/******************************************************************* * This file is part of the Emulex Linux Device Driver for * * Fibre Channel Host Bus Adapters. * * Copyright (C) 2017-2025 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 <linux/unaligned.h> #include <linux/t10-pi.h> #include <linux/crc-t10dif.h> #include <linux/blk-cgroup.h> #include <net/checksum.h>
/** * 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.
**/ staticvoid
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)
{ unsignedlong flags;
uint32_t evt_posted; unsignedlong expires;
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; unsignedlong new_queue_depth; unsignedlong num_rsrc_err; int i;
num_rsrc_err = atomic_read(&phba->num_rsrc_err);
/* * 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) { if (num_rsrc_err >= sdev->queue_depth)
new_queue_depth = 1; else
new_queue_depth = sdev->queue_depth -
num_rsrc_err;
scsi_change_queue_depth(sdev, new_queue_depth);
}
}
lpfc_destroy_vport_work_array(phba, vports);
atomic_set(&phba->num_rsrc_err, 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.
**/ staticint
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;
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;
}
/* * 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; unsignedlong iflag = 0; int idx;
if (!(vport->cfg_enable_fc4_type & LPFC_ENABLE_FCP)) return;
/* may be called before queues established if hba_setup fails */ if (!phba->sli4_hba.hdwq) return;
/* 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];
/** * 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
**/ staticstruct 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; unsignedlong iflag = 0;
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
**/ staticstruct 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_le *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;
}
/* * 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_le *)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));
bf_set_le32(lpfc_sli4_sge_last, sgl, 0); if (cmnd && cmnd->cmd_len > LPFC_FCP_CDB_LEN)
sgl->sge_len = cpu_to_le32(sizeof(struct fcp_cmnd32)); else
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_cmnd32);
sgl->addr_hi = cpu_to_le32(putPaddrHigh(pdma_phys_fcp_rsp));
sgl->addr_lo = cpu_to_le32(putPaddrLow(pdma_phys_fcp_rsp));
bf_set_le32(lpfc_sli4_sge_last, sgl, 1);
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
**/ staticstruct 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.
**/ staticvoid
lpfc_release_scsi_buf_s3(struct lpfc_hba *phba, struct lpfc_io_buf *psb)
{ unsignedlong iflag = 0;
/** * 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.
**/ staticvoid
lpfc_release_scsi_buf_s4(struct lpfc_hba *phba, struct lpfc_io_buf *psb)
{ struct lpfc_sli4_hdw_queue *qp; unsignedlong iflag = 0;
/** * 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.
**/ staticvoid
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);
/** * 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.
**/ staticvoid
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
**/ staticint
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
**/ staticint
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;
/* 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.
*/
/* * 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", (unsignedlong)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", (unsignedlong)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;
/* 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.
*/
/* * 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", (unsignedlong)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", (unsignedlong)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;
/* 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", (unsignedlong)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", (unsignedlong)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_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 *
**/ staticint
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 *
**/ staticint
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.
**/ staticint
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);
/* 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);
/* 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.
**/ staticint
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; unsignedshort curr_prot = 0; unsignedint split_offset; unsignedint protgroup_len, protgroup_offset = 0, protgroup_remainder; unsignedint protgrp_blks, protgrp_bytes; unsignedint remainder, subtotal; int status; int datadir = sc->sc_data_direction; unsignedchar 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;
/* 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);
/* 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;
/* 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;
} elseif (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 uint32_t
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, status;
uint32_t reftag, num_sge = 0;
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);
/* * 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);
/* 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 = (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 uint32_t
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; unsignedshort curr_prot = 0; unsignedint split_offset; unsignedint protgroup_len, protgroup_offset = 0, protgroup_remainder; unsignedint protgrp_blks, protgrp_bytes; unsignedint remainder, subtotal; int status; unsignedchar 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, num_sge = 0; int j = 2; struct sli4_hybrid_sgl *sgl_xtra = NULL;
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);
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;
}
}
/* 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;
} elseif (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) *
**/ staticint
lpfc_prot_group_type(struct lpfc_hba *phba, struct scsi_cmnd *sc)
{ int ret = LPFC_PG_TYPE_INVALID; unsignedchar 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
**/ staticint
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.
**/ staticint
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;
}
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;
/* * 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;
/* * 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);
/* * 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.
*/ staticvoid
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 = sg_dma_len(sgde); 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 = sg_dma_len(sgpe); 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;
}
}
/* 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;
/* * 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)
*/ staticint
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;
/* 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);
}
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;
}
/* 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
**/ staticint
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 = (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);
/* * 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.
*/ if (scsi_cmnd->cmd_len > LPFC_FCP_CDB_LEN)
((struct fcp_cmnd32 *)fcp_cmnd)->fcpDl =
cpu_to_be32(scsi_bufflen(scsi_cmnd)); else
fcp_cmnd->fcpDl = cpu_to_be32(scsi_bufflen(scsi_cmnd)); /* Set first-burst provided it was successfully negotiated */ if (!test_bit(HBA_FCOE_MODE, &phba->hba_flag) &&
vport->cfg_first_burst_size &&
scsi_cmnd->sc_data_direction == DMA_TO_DEVICE) {
u32 init_len, total_len;
/* * 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);
/** * 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
**/ staticint
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;
}
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;
}
/* 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;
}
/* 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;
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;
}
/* * 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_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
**/ staticinlineint
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
**/ staticinlineint
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
**/ staticinlineint
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.
**/ staticvoid
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; unsignedlong 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));
} elseif ((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];
} elseif ((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;
/** * 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.
**/ staticvoid
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;
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;
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 */
/** * 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);
}
/** * 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.
**/ staticvoid
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;
}
/* 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;
}
/* * 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;
}
} elseif (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.
*/
} elseif (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));
}
/** * 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.
**/ staticvoid
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; unsignedlong 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++;
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;
}
/* 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.
**/ staticvoid
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; unsignedlong 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++;
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;
}
/* 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,
**/ staticint 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 &&
test_bit(NLP_FIRSTBURST, &pnode->nlp_flag)) {
u32 xrdy_len;
/* * 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;
/** * 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,
**/ staticint 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);
}
/* Additional fcp cdb length field calculation. * LPFC_FCP_CDB_LEN_32 - normal 16 byte cdb length, * then divide by 4 for the word count. * shift 2 because of the RDDATA/WRDATA.
*/ if (scsi_cmnd->cmd_len > LPFC_FCP_CDB_LEN)
fcp_cmnd->fcpCntl3 |= 4 << 2;
} 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
*/
/** * 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.
**/ staticint
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;
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
**/ staticint
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;
/* 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;
/* 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_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)
{
/** * 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.
**/ staticvoid
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)
{ conststruct 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 ||
test_bit(HBA_FCOE_MODE, &phba->hba_flag)) {
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.
**/ constchar *
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; staticchar 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;
}
/* Support for BSG ioctls */
scnprintf(tmp, sizeof(tmp), " BSG"); if (strlcat(lpfcinfobuf, tmp, sizeof(lpfcinfobuf)) >= sizeof(lpfcinfobuf)) goto buffer_done;
/** * 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)
{ unsignedlong 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 = timer_container_of(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
*/ staticchar *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.
**/ staticint
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;
/* * 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 (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;
}
}
/* * 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)
timer_delete_sync(&vport->phba->inactive_vmid_poll);
/** * 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
**/ staticint
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; unsignedlong 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 (test_bit(HBA_IOQ_FLUSH, &phba->hba_flag)) {
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) { /* if the io_wq & pring are gone, the port was reset. */ if (!phba->sli4_hba.hdwq[iocb->hba_wqidx].io_wq ||
!phba->sli4_hba.hdwq[iocb->hba_wqidx].io_wq->pring) {
lpfc_printf_vlog(vport, KERN_WARNING, LOG_FCP, "2877 SCSI Layer I/O Abort Request " "IO CMPL Status x%x ID %d LUN %llu " "HBA_SETUP %d\n", FAILED,
cmnd->device->id,
(u64)cmnd->device->lun,
test_bit(HBA_SETUP, &phba->hba_flag));
ret = FAILED; goto out_unlock_hba;
}
pring_s4 = phba->sli4_hba.hdwq[iocb->hba_wqidx].io_wq->pring;
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;
}
/* 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),
secs_to_jiffies(2*vport->cfg_devloss_tmo));
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);
}
staticchar *
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
**/ staticint
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 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.
**/ staticint
lpfc_send_taskmgmt(struct lpfc_vport *vport, struct fc_rport *rport, unsignedint 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;
/* * If target is not in a MAPPED state, delay until * target is rediscovered or devloss timeout expires.
*/
later = secs_to_jiffies(2 * vport->cfg_devloss_tmo) + 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 context - 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
**/ staticint
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; unsignedlong later; int cnt;
/* * 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);
/* * 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
**/ staticint
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_sdev_init - scsi_host_template sdev_init 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
**/ staticint
lpfc_sdev_init(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; unsignedlong 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.
*/
/* 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 */
} elseif (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_sdev_configure - scsi_host_template sdev_configure entry point * @sdev: Pointer to scsi_device. * @lim: Request queue limits. * * 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
**/ staticint
lpfc_sdev_configure(struct scsi_device *sdev, struct queue_limits *lim)
{ struct lpfc_vport *vport = (struct lpfc_vport *) sdev->host->hostdata; struct lpfc_hba *phba = vport->phba;
/** * 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)
{
/** * 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)
{
/** * 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)
{
/** * 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)
{
if (unlikely(!phba) || !vport_wwpn || !target_wwpn ||
!phba->cfg_fof) returnfalse;
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); returntrue;
}
/* 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); returntrue;
}
spin_unlock_irqrestore(&phba->devicelock, flags); returnfalse;
}
/** * 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)
{
if (unlikely(!phba) || !vport_wwpn || !target_wwpn ||
!phba->cfg_fof) returnfalse;
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); returntrue;
}
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