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lpfc_bsg.c
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/*******************************************************************
* This file is part of the Emulex Linux Device Driver for *
* Fibre Channel Host Bus Adapters. *
* Copyright (C) 2009-2011 Emulex. All rights reserved. *
* EMULEX and SLI are trademarks of Emulex. *
* www.emulex.com *
* *
* 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/interrupt.h>
#include <linux/mempool.h>
#include <linux/pci.h>
#include <linux/slab.h>
#include <linux/delay.h>
#include <linux/list.h>
#include <scsi/scsi.h>
#include <scsi/scsi_host.h>
#include <scsi/scsi_transport_fc.h>
#include <scsi/scsi_bsg_fc.h>
#include <scsi/fc/fc_fs.h>
#include "lpfc_hw4.h"
#include "lpfc_hw.h"
#include "lpfc_sli.h"
#include "lpfc_sli4.h"
#include "lpfc_nl.h"
#include "lpfc_bsg.h"
#include "lpfc_disc.h"
#include "lpfc_scsi.h"
#include "lpfc.h"
#include "lpfc_logmsg.h"
#include "lpfc_crtn.h"
#include "lpfc_vport.h"
#include "lpfc_version.h"
struct lpfc_bsg_event {
struct list_head node;
struct kref kref;
wait_queue_head_t wq;
/* Event type and waiter identifiers */
uint32_t type_mask;
uint32_t req_id;
uint32_t reg_id;
/* next two flags are here for the auto-delete logic */
unsigned long wait_time_stamp;
int waiting;
/* seen and not seen events */
struct list_head events_to_get;
struct list_head events_to_see;
/* job waiting for this event to finish */
struct fc_bsg_job *set_job;
};
struct lpfc_bsg_iocb {
struct lpfc_iocbq *cmdiocbq;
struct lpfc_iocbq *rspiocbq;
struct lpfc_dmabuf *bmp;
struct lpfc_nodelist *ndlp;
/* job waiting for this iocb to finish */
struct fc_bsg_job *set_job;
};
struct lpfc_bsg_mbox {
LPFC_MBOXQ_t *pmboxq;
MAILBOX_t *mb;
struct lpfc_dmabuf *dmabuffers; /* for BIU diags */
uint8_t *ext; /* extended mailbox data */
uint32_t mbOffset; /* from app */
uint32_t inExtWLen; /* from app */
uint32_t outExtWLen; /* from app */
/* job waiting for this mbox command to finish */
struct fc_bsg_job *set_job;
};
#define MENLO_DID 0x0000FC0E
struct lpfc_bsg_menlo {
struct lpfc_iocbq *cmdiocbq;
struct lpfc_iocbq *rspiocbq;
struct lpfc_dmabuf *bmp;
/* job waiting for this iocb to finish */
struct fc_bsg_job *set_job;
};
#define TYPE_EVT 1
#define TYPE_IOCB 2
#define TYPE_MBOX 3
#define TYPE_MENLO 4
struct bsg_job_data {
uint32_t type;
union {
struct lpfc_bsg_event *evt;
struct lpfc_bsg_iocb iocb;
struct lpfc_bsg_mbox mbox;
struct lpfc_bsg_menlo menlo;
} context_un;
};
struct event_data {
struct list_head node;
uint32_t type;
uint32_t immed_dat;
void *data;
uint32_t len;
};
#define BUF_SZ_4K 4096
#define SLI_CT_ELX_LOOPBACK 0x10
enum ELX_LOOPBACK_CMD {
ELX_LOOPBACK_XRI_SETUP,
ELX_LOOPBACK_DATA,
};
#define ELX_LOOPBACK_HEADER_SZ \
(size_t)(&((struct lpfc_sli_ct_request *)NULL)->un)
struct lpfc_dmabufext {
struct lpfc_dmabuf dma;
uint32_t size;
uint32_t flag;
};
/**
* lpfc_bsg_send_mgmt_cmd_cmp - lpfc_bsg_send_mgmt_cmd's completion handler
* @phba: Pointer to HBA context object.
* @cmdiocbq: Pointer to command iocb.
* @rspiocbq: Pointer to response iocb.
*
* This function is the completion handler for iocbs issued using
* lpfc_bsg_send_mgmt_cmd function. This function is called by the
* ring event handler function without any lock held. This function
* can be called from both worker thread context and interrupt
* context. This function also can be called from another thread which
* cleans up the SLI layer objects.
* This function copies the contents of the response iocb to the
* response iocb memory object provided by the caller of
* lpfc_sli_issue_iocb_wait and then wakes up the thread which
* sleeps for the iocb completion.
**/
static void
lpfc_bsg_send_mgmt_cmd_cmp(struct lpfc_hba *phba,
struct lpfc_iocbq *cmdiocbq,
struct lpfc_iocbq *rspiocbq)
{
struct bsg_job_data *dd_data;
struct fc_bsg_job *job;
IOCB_t *rsp;
struct lpfc_dmabuf *bmp;
struct lpfc_nodelist *ndlp;
struct lpfc_bsg_iocb *iocb;
unsigned long flags;
int rc = 0;
spin_lock_irqsave(&phba->ct_ev_lock, flags);
dd_data = cmdiocbq->context2;
if (!dd_data) {
spin_unlock_irqrestore(&phba->ct_ev_lock, flags);
lpfc_sli_release_iocbq(phba, cmdiocbq);
return;
}
iocb = &dd_data->context_un.iocb;
job = iocb->set_job;
job->dd_data = NULL; /* so timeout handler does not reply */
bmp = iocb->bmp;
rsp = &rspiocbq->iocb;
ndlp = cmdiocbq->context1;
pci_unmap_sg(phba->pcidev, job->request_payload.sg_list,
job->request_payload.sg_cnt, DMA_TO_DEVICE);
pci_unmap_sg(phba->pcidev, job->reply_payload.sg_list,
job->reply_payload.sg_cnt, DMA_FROM_DEVICE);
if (rsp->ulpStatus) {
if (rsp->ulpStatus == IOSTAT_LOCAL_REJECT) {
switch (rsp->un.ulpWord[4] & 0xff) {
case IOERR_SEQUENCE_TIMEOUT:
rc = -ETIMEDOUT;
break;
case IOERR_INVALID_RPI:
rc = -EFAULT;
break;
default:
rc = -EACCES;
break;
}
} else
rc = -EACCES;
} else
job->reply->reply_payload_rcv_len =
rsp->un.genreq64.bdl.bdeSize;
lpfc_mbuf_free(phba, bmp->virt, bmp->phys);
lpfc_sli_release_iocbq(phba, cmdiocbq);
lpfc_nlp_put(ndlp);
kfree(bmp);
kfree(dd_data);
/* make error code available to userspace */
job->reply->result = rc;
/* complete the job back to userspace */
job->job_done(job);
spin_unlock_irqrestore(&phba->ct_ev_lock, flags);
return;
}
/**
* lpfc_bsg_send_mgmt_cmd - send a CT command from a bsg request
* @job: fc_bsg_job to handle
**/
static int
lpfc_bsg_send_mgmt_cmd(struct fc_bsg_job *job)
{
struct lpfc_vport *vport = (struct lpfc_vport *)job->shost->hostdata;
struct lpfc_hba *phba = vport->phba;
struct lpfc_rport_data *rdata = job->rport->dd_data;
struct lpfc_nodelist *ndlp = rdata->pnode;
struct ulp_bde64 *bpl = NULL;
uint32_t timeout;
struct lpfc_iocbq *cmdiocbq = NULL;
IOCB_t *cmd;
struct lpfc_dmabuf *bmp = NULL;
int request_nseg;
int reply_nseg;
struct scatterlist *sgel = NULL;
int numbde;
dma_addr_t busaddr;
struct bsg_job_data *dd_data;
uint32_t creg_val;
int rc = 0;
int iocb_stat;
/* in case no data is transferred */
job->reply->reply_payload_rcv_len = 0;
/* allocate our bsg tracking structure */
dd_data = kmalloc(sizeof(struct bsg_job_data), GFP_KERNEL);
if (!dd_data) {
lpfc_printf_log(phba, KERN_WARNING, LOG_LIBDFC,
"2733 Failed allocation of dd_data\n");
rc = -ENOMEM;
goto no_dd_data;
}
if (!lpfc_nlp_get(ndlp)) {
rc = -ENODEV;
goto no_ndlp;
}
bmp = kmalloc(sizeof(struct lpfc_dmabuf), GFP_KERNEL);
if (!bmp) {
rc = -ENOMEM;
goto free_ndlp;
}
if (ndlp->nlp_flag & NLP_ELS_SND_MASK) {
rc = -ENODEV;
goto free_bmp;
}
cmdiocbq = lpfc_sli_get_iocbq(phba);
if (!cmdiocbq) {
rc = -ENOMEM;
goto free_bmp;
}
cmd = &cmdiocbq->iocb;
bmp->virt = lpfc_mbuf_alloc(phba, 0, &bmp->phys);
if (!bmp->virt) {
rc = -ENOMEM;
goto free_cmdiocbq;
}
INIT_LIST_HEAD(&bmp->list);
bpl = (struct ulp_bde64 *) bmp->virt;
request_nseg = pci_map_sg(phba->pcidev, job->request_payload.sg_list,
job->request_payload.sg_cnt, DMA_TO_DEVICE);
for_each_sg(job->request_payload.sg_list, sgel, request_nseg, numbde) {
busaddr = sg_dma_address(sgel);
bpl->tus.f.bdeFlags = BUFF_TYPE_BDE_64;
bpl->tus.f.bdeSize = sg_dma_len(sgel);
bpl->tus.w = cpu_to_le32(bpl->tus.w);
bpl->addrLow = cpu_to_le32(putPaddrLow(busaddr));
bpl->addrHigh = cpu_to_le32(putPaddrHigh(busaddr));
bpl++;
}
reply_nseg = pci_map_sg(phba->pcidev, job->reply_payload.sg_list,
job->reply_payload.sg_cnt, DMA_FROM_DEVICE);
for_each_sg(job->reply_payload.sg_list, sgel, reply_nseg, numbde) {
busaddr = sg_dma_address(sgel);
bpl->tus.f.bdeFlags = BUFF_TYPE_BDE_64I;
bpl->tus.f.bdeSize = sg_dma_len(sgel);
bpl->tus.w = cpu_to_le32(bpl->tus.w);
bpl->addrLow = cpu_to_le32(putPaddrLow(busaddr));
bpl->addrHigh = cpu_to_le32(putPaddrHigh(busaddr));
bpl++;
}
cmd->un.genreq64.bdl.ulpIoTag32 = 0;
cmd->un.genreq64.bdl.addrHigh = putPaddrHigh(bmp->phys);
cmd->un.genreq64.bdl.addrLow = putPaddrLow(bmp->phys);
cmd->un.genreq64.bdl.bdeFlags = BUFF_TYPE_BLP_64;
cmd->un.genreq64.bdl.bdeSize =
(request_nseg + reply_nseg) * sizeof(struct ulp_bde64);
cmd->ulpCommand = CMD_GEN_REQUEST64_CR;
cmd->un.genreq64.w5.hcsw.Fctl = (SI | LA);
cmd->un.genreq64.w5.hcsw.Dfctl = 0;
cmd->un.genreq64.w5.hcsw.Rctl = FC_RCTL_DD_UNSOL_CTL;
cmd->un.genreq64.w5.hcsw.Type = FC_TYPE_CT;
cmd->ulpBdeCount = 1;
cmd->ulpLe = 1;
cmd->ulpClass = CLASS3;
cmd->ulpContext = ndlp->nlp_rpi;
if (phba->sli_rev == LPFC_SLI_REV4)
cmd->ulpContext = phba->sli4_hba.rpi_ids[ndlp->nlp_rpi];
cmd->ulpOwner = OWN_CHIP;
cmdiocbq->vport = phba->pport;
cmdiocbq->context3 = bmp;
cmdiocbq->iocb_flag |= LPFC_IO_LIBDFC;
timeout = phba->fc_ratov * 2;
cmd->ulpTimeout = timeout;
cmdiocbq->iocb_cmpl = lpfc_bsg_send_mgmt_cmd_cmp;
cmdiocbq->context1 = ndlp;
cmdiocbq->context2 = dd_data;
dd_data->type = TYPE_IOCB;
dd_data->context_un.iocb.cmdiocbq = cmdiocbq;
dd_data->context_un.iocb.set_job = job;
dd_data->context_un.iocb.bmp = bmp;
if (phba->cfg_poll & DISABLE_FCP_RING_INT) {
if (lpfc_readl(phba->HCregaddr, &creg_val)) {
rc = -EIO ;
goto free_cmdiocbq;
}
creg_val |= (HC_R0INT_ENA << LPFC_FCP_RING);
writel(creg_val, phba->HCregaddr);
readl(phba->HCregaddr); /* flush */
}
iocb_stat = lpfc_sli_issue_iocb(phba, LPFC_ELS_RING, cmdiocbq, 0);
if (iocb_stat == IOCB_SUCCESS)
return 0; /* done for now */
else if (iocb_stat == IOCB_BUSY)
rc = -EAGAIN;
else
rc = -EIO;
/* iocb failed so cleanup */
pci_unmap_sg(phba->pcidev, job->request_payload.sg_list,
job->request_payload.sg_cnt, DMA_TO_DEVICE);
pci_unmap_sg(phba->pcidev, job->reply_payload.sg_list,
job->reply_payload.sg_cnt, DMA_FROM_DEVICE);
lpfc_mbuf_free(phba, bmp->virt, bmp->phys);
free_cmdiocbq:
lpfc_sli_release_iocbq(phba, cmdiocbq);
free_bmp:
kfree(bmp);
free_ndlp:
lpfc_nlp_put(ndlp);
no_ndlp:
kfree(dd_data);
no_dd_data:
/* make error code available to userspace */
job->reply->result = rc;
job->dd_data = NULL;
return rc;
}
/**
* lpfc_bsg_rport_els_cmp - lpfc_bsg_rport_els's completion handler
* @phba: Pointer to HBA context object.
* @cmdiocbq: Pointer to command iocb.
* @rspiocbq: Pointer to response iocb.
*
* This function is the completion handler for iocbs issued using
* lpfc_bsg_rport_els_cmp function. This function is called by the
* ring event handler function without any lock held. This function
* can be called from both worker thread context and interrupt
* context. This function also can be called from other thread which
* cleans up the SLI layer objects.
* This function copies the contents of the response iocb to the
* response iocb memory object provided by the caller of
* lpfc_sli_issue_iocb_wait and then wakes up the thread which
* sleeps for the iocb completion.
**/
static void
lpfc_bsg_rport_els_cmp(struct lpfc_hba *phba,
struct lpfc_iocbq *cmdiocbq,
struct lpfc_iocbq *rspiocbq)
{
struct bsg_job_data *dd_data;
struct fc_bsg_job *job;
IOCB_t *rsp;
struct lpfc_nodelist *ndlp;
struct lpfc_dmabuf *pbuflist = NULL;
struct fc_bsg_ctels_reply *els_reply;
uint8_t *rjt_data;
unsigned long flags;
int rc = 0;
spin_lock_irqsave(&phba->ct_ev_lock, flags);
dd_data = cmdiocbq->context1;
/* normal completion and timeout crossed paths, already done */
if (!dd_data) {
spin_unlock_irqrestore(&phba->ct_ev_lock, flags);
return;
}
cmdiocbq->iocb_flag |= LPFC_IO_WAKE;
if (cmdiocbq->context2 && rspiocbq)
memcpy(&((struct lpfc_iocbq *)cmdiocbq->context2)->iocb,
&rspiocbq->iocb, sizeof(IOCB_t));
job = dd_data->context_un.iocb.set_job;
cmdiocbq = dd_data->context_un.iocb.cmdiocbq;
rspiocbq = dd_data->context_un.iocb.rspiocbq;
rsp = &rspiocbq->iocb;
ndlp = dd_data->context_un.iocb.ndlp;
pci_unmap_sg(phba->pcidev, job->request_payload.sg_list,
job->request_payload.sg_cnt, DMA_TO_DEVICE);
pci_unmap_sg(phba->pcidev, job->reply_payload.sg_list,
job->reply_payload.sg_cnt, DMA_FROM_DEVICE);
if (job->reply->result == -EAGAIN)
rc = -EAGAIN;
else if (rsp->ulpStatus == IOSTAT_SUCCESS)
job->reply->reply_payload_rcv_len =
rsp->un.elsreq64.bdl.bdeSize;
else if (rsp->ulpStatus == IOSTAT_LS_RJT) {
job->reply->reply_payload_rcv_len =
sizeof(struct fc_bsg_ctels_reply);
/* LS_RJT data returned in word 4 */
rjt_data = (uint8_t *)&rsp->un.ulpWord[4];
els_reply = &job->reply->reply_data.ctels_reply;
els_reply->status = FC_CTELS_STATUS_REJECT;
els_reply->rjt_data.action = rjt_data[3];
els_reply->rjt_data.reason_code = rjt_data[2];
els_reply->rjt_data.reason_explanation = rjt_data[1];
els_reply->rjt_data.vendor_unique = rjt_data[0];
} else
rc = -EIO;
pbuflist = (struct lpfc_dmabuf *) cmdiocbq->context3;
lpfc_mbuf_free(phba, pbuflist->virt, pbuflist->phys);
lpfc_sli_release_iocbq(phba, rspiocbq);
lpfc_sli_release_iocbq(phba, cmdiocbq);
lpfc_nlp_put(ndlp);
kfree(dd_data);
/* make error code available to userspace */
job->reply->result = rc;
job->dd_data = NULL;
/* complete the job back to userspace */
job->job_done(job);
spin_unlock_irqrestore(&phba->ct_ev_lock, flags);
return;
}
/**
* lpfc_bsg_rport_els - send an ELS command from a bsg request
* @job: fc_bsg_job to handle
**/
static int
lpfc_bsg_rport_els(struct fc_bsg_job *job)
{
struct lpfc_vport *vport = (struct lpfc_vport *)job->shost->hostdata;
struct lpfc_hba *phba = vport->phba;
struct lpfc_rport_data *rdata = job->rport->dd_data;
struct lpfc_nodelist *ndlp = rdata->pnode;
uint32_t elscmd;
uint32_t cmdsize;
uint32_t rspsize;
struct lpfc_iocbq *rspiocbq;
struct lpfc_iocbq *cmdiocbq;
IOCB_t *rsp;
uint16_t rpi = 0;
struct lpfc_dmabuf *pcmd;
struct lpfc_dmabuf *prsp;
struct lpfc_dmabuf *pbuflist = NULL;
struct ulp_bde64 *bpl;
int request_nseg;
int reply_nseg;
struct scatterlist *sgel = NULL;
int numbde;
dma_addr_t busaddr;
struct bsg_job_data *dd_data;
uint32_t creg_val;
int rc = 0;
/* in case no data is transferred */
job->reply->reply_payload_rcv_len = 0;
/* allocate our bsg tracking structure */
dd_data = kmalloc(sizeof(struct bsg_job_data), GFP_KERNEL);
if (!dd_data) {
lpfc_printf_log(phba, KERN_WARNING, LOG_LIBDFC,
"2735 Failed allocation of dd_data\n");
rc = -ENOMEM;
goto no_dd_data;
}
if (!lpfc_nlp_get(ndlp)) {
rc = -ENODEV;
goto free_dd_data;
}
elscmd = job->request->rqst_data.r_els.els_code;
cmdsize = job->request_payload.payload_len;
rspsize = job->reply_payload.payload_len;
rspiocbq = lpfc_sli_get_iocbq(phba);
if (!rspiocbq) {
lpfc_nlp_put(ndlp);
rc = -ENOMEM;
goto free_dd_data;
}
rsp = &rspiocbq->iocb;
rpi = ndlp->nlp_rpi;
cmdiocbq = lpfc_prep_els_iocb(vport, 1, cmdsize, 0, ndlp,
ndlp->nlp_DID, elscmd);
if (!cmdiocbq) {
rc = -EIO;
goto free_rspiocbq;
}
/* prep els iocb set context1 to the ndlp, context2 to the command
* dmabuf, context3 holds the data dmabuf
*/
pcmd = (struct lpfc_dmabuf *) cmdiocbq->context2;
prsp = (struct lpfc_dmabuf *) pcmd->list.next;
lpfc_mbuf_free(phba, pcmd->virt, pcmd->phys);
kfree(pcmd);
lpfc_mbuf_free(phba, prsp->virt, prsp->phys);
kfree(prsp);
cmdiocbq->context2 = NULL;
pbuflist = (struct lpfc_dmabuf *) cmdiocbq->context3;
bpl = (struct ulp_bde64 *) pbuflist->virt;
request_nseg = pci_map_sg(phba->pcidev, job->request_payload.sg_list,
job->request_payload.sg_cnt, DMA_TO_DEVICE);
for_each_sg(job->request_payload.sg_list, sgel, request_nseg, numbde) {
busaddr = sg_dma_address(sgel);
bpl->tus.f.bdeFlags = BUFF_TYPE_BDE_64;
bpl->tus.f.bdeSize = sg_dma_len(sgel);
bpl->tus.w = cpu_to_le32(bpl->tus.w);
bpl->addrLow = cpu_to_le32(putPaddrLow(busaddr));
bpl->addrHigh = cpu_to_le32(putPaddrHigh(busaddr));
bpl++;
}
reply_nseg = pci_map_sg(phba->pcidev, job->reply_payload.sg_list,
job->reply_payload.sg_cnt, DMA_FROM_DEVICE);
for_each_sg(job->reply_payload.sg_list, sgel, reply_nseg, numbde) {
busaddr = sg_dma_address(sgel);
bpl->tus.f.bdeFlags = BUFF_TYPE_BDE_64I;
bpl->tus.f.bdeSize = sg_dma_len(sgel);
bpl->tus.w = cpu_to_le32(bpl->tus.w);
bpl->addrLow = cpu_to_le32(putPaddrLow(busaddr));
bpl->addrHigh = cpu_to_le32(putPaddrHigh(busaddr));
bpl++;
}
cmdiocbq->iocb.un.elsreq64.bdl.bdeSize =
(request_nseg + reply_nseg) * sizeof(struct ulp_bde64);
cmdiocbq->iocb.ulpContext = rpi;
cmdiocbq->iocb_flag |= LPFC_IO_LIBDFC;
cmdiocbq->context1 = NULL;
cmdiocbq->context2 = NULL;
cmdiocbq->iocb_cmpl = lpfc_bsg_rport_els_cmp;
cmdiocbq->context1 = dd_data;
cmdiocbq->context2 = rspiocbq;
dd_data->type = TYPE_IOCB;
dd_data->context_un.iocb.cmdiocbq = cmdiocbq;
dd_data->context_un.iocb.rspiocbq = rspiocbq;
dd_data->context_un.iocb.set_job = job;
dd_data->context_un.iocb.bmp = NULL;
dd_data->context_un.iocb.ndlp = ndlp;
if (phba->cfg_poll & DISABLE_FCP_RING_INT) {
if (lpfc_readl(phba->HCregaddr, &creg_val)) {
rc = -EIO;
goto linkdown_err;
}
creg_val |= (HC_R0INT_ENA << LPFC_FCP_RING);
writel(creg_val, phba->HCregaddr);
readl(phba->HCregaddr); /* flush */
}
rc = lpfc_sli_issue_iocb(phba, LPFC_ELS_RING, cmdiocbq, 0);
lpfc_nlp_put(ndlp);
if (rc == IOCB_SUCCESS)
return 0; /* done for now */
else if (rc == IOCB_BUSY)
rc = -EAGAIN;
else
rc = -EIO;
linkdown_err:
pci_unmap_sg(phba->pcidev, job->request_payload.sg_list,
job->request_payload.sg_cnt, DMA_TO_DEVICE);
pci_unmap_sg(phba->pcidev, job->reply_payload.sg_list,
job->reply_payload.sg_cnt, DMA_FROM_DEVICE);
lpfc_mbuf_free(phba, pbuflist->virt, pbuflist->phys);
lpfc_sli_release_iocbq(phba, cmdiocbq);
free_rspiocbq:
lpfc_sli_release_iocbq(phba, rspiocbq);
free_dd_data:
kfree(dd_data);
no_dd_data:
/* make error code available to userspace */
job->reply->result = rc;
job->dd_data = NULL;
return rc;
}
/**
* lpfc_bsg_event_free - frees an allocated event structure
* @kref: Pointer to a kref.
*
* Called from kref_put. Back cast the kref into an event structure address.
* Free any events to get, delete associated nodes, free any events to see,
* free any data then free the event itself.
**/
static void
lpfc_bsg_event_free(struct kref *kref)
{
struct lpfc_bsg_event *evt = container_of(kref, struct lpfc_bsg_event,
kref);
struct event_data *ed;
list_del(&evt->node);
while (!list_empty(&evt->events_to_get)) {
ed = list_entry(evt->events_to_get.next, typeof(*ed), node);
list_del(&ed->node);
kfree(ed->data);
kfree(ed);
}
while (!list_empty(&evt->events_to_see)) {
ed = list_entry(evt->events_to_see.next, typeof(*ed), node);
list_del(&ed->node);
kfree(ed->data);
kfree(ed);
}
kfree(evt);
}
/**
* lpfc_bsg_event_ref - increments the kref for an event
* @evt: Pointer to an event structure.
**/
static inline void
lpfc_bsg_event_ref(struct lpfc_bsg_event *evt)
{
kref_get(&evt->kref);
}
/**
* lpfc_bsg_event_unref - Uses kref_put to free an event structure
* @evt: Pointer to an event structure.
**/
static inline void
lpfc_bsg_event_unref(struct lpfc_bsg_event *evt)
{
kref_put(&evt->kref, lpfc_bsg_event_free);
}
/**
* lpfc_bsg_event_new - allocate and initialize a event structure
* @ev_mask: Mask of events.
* @ev_reg_id: Event reg id.
* @ev_req_id: Event request id.
**/
static struct lpfc_bsg_event *
lpfc_bsg_event_new(uint32_t ev_mask, int ev_reg_id, uint32_t ev_req_id)
{
struct lpfc_bsg_event *evt = kzalloc(sizeof(*evt), GFP_KERNEL);
if (!evt)
return NULL;
INIT_LIST_HEAD(&evt->events_to_get);
INIT_LIST_HEAD(&evt->events_to_see);
evt->type_mask = ev_mask;
evt->req_id = ev_req_id;
evt->reg_id = ev_reg_id;
evt->wait_time_stamp = jiffies;
init_waitqueue_head(&evt->wq);
kref_init(&evt->kref);
return evt;
}
/**
* diag_cmd_data_free - Frees an lpfc dma buffer extension
* @phba: Pointer to HBA context object.
* @mlist: Pointer to an lpfc dma buffer extension.
**/
static int
diag_cmd_data_free(struct lpfc_hba *phba, struct lpfc_dmabufext *mlist)
{
struct lpfc_dmabufext *mlast;
struct pci_dev *pcidev;
struct list_head head, *curr, *next;
if ((!mlist) || (!lpfc_is_link_up(phba) &&
(phba->link_flag & LS_LOOPBACK_MODE))) {
return 0;
}
pcidev = phba->pcidev;
list_add_tail(&head, &mlist->dma.list);
list_for_each_safe(curr, next, &head) {
mlast = list_entry(curr, struct lpfc_dmabufext , dma.list);
if (mlast->dma.virt)
dma_free_coherent(&pcidev->dev,
mlast->size,
mlast->dma.virt,
mlast->dma.phys);
kfree(mlast);
}
return 0;
}
/**
* lpfc_bsg_ct_unsol_event - process an unsolicited CT command
* @phba:
* @pring:
* @piocbq:
*
* This function is called when an unsolicited CT command is received. It
* forwards the event to any processes registered to receive CT events.
**/
int
lpfc_bsg_ct_unsol_event(struct lpfc_hba *phba, struct lpfc_sli_ring *pring,
struct lpfc_iocbq *piocbq)
{
uint32_t evt_req_id = 0;
uint32_t cmd;
uint32_t len;
struct lpfc_dmabuf *dmabuf = NULL;
struct lpfc_bsg_event *evt;
struct event_data *evt_dat = NULL;
struct lpfc_iocbq *iocbq;
size_t offset = 0;
struct list_head head;
struct ulp_bde64 *bde;
dma_addr_t dma_addr;
int i;
struct lpfc_dmabuf *bdeBuf1 = piocbq->context2;
struct lpfc_dmabuf *bdeBuf2 = piocbq->context3;
struct lpfc_hbq_entry *hbqe;
struct lpfc_sli_ct_request *ct_req;
struct fc_bsg_job *job = NULL;
unsigned long flags;
int size = 0;
INIT_LIST_HEAD(&head);
list_add_tail(&head, &piocbq->list);
if (piocbq->iocb.ulpBdeCount == 0 ||
piocbq->iocb.un.cont64[0].tus.f.bdeSize == 0)
goto error_ct_unsol_exit;
if (phba->link_state == LPFC_HBA_ERROR ||
(!(phba->sli.sli_flag & LPFC_SLI_ACTIVE)))
goto error_ct_unsol_exit;
if (phba->sli3_options & LPFC_SLI3_HBQ_ENABLED)
dmabuf = bdeBuf1;
else {
dma_addr = getPaddr(piocbq->iocb.un.cont64[0].addrHigh,
piocbq->iocb.un.cont64[0].addrLow);
dmabuf = lpfc_sli_ringpostbuf_get(phba, pring, dma_addr);
}
if (dmabuf == NULL)
goto error_ct_unsol_exit;
ct_req = (struct lpfc_sli_ct_request *)dmabuf->virt;
evt_req_id = ct_req->FsType;
cmd = ct_req->CommandResponse.bits.CmdRsp;
len = ct_req->CommandResponse.bits.Size;
if (!(phba->sli3_options & LPFC_SLI3_HBQ_ENABLED))
lpfc_sli_ringpostbuf_put(phba, pring, dmabuf);
spin_lock_irqsave(&phba->ct_ev_lock, flags);
list_for_each_entry(evt, &phba->ct_ev_waiters, node) {
if (!(evt->type_mask & FC_REG_CT_EVENT) ||
evt->req_id != evt_req_id)
continue;
lpfc_bsg_event_ref(evt);
spin_unlock_irqrestore(&phba->ct_ev_lock, flags);
evt_dat = kzalloc(sizeof(*evt_dat), GFP_KERNEL);
if (evt_dat == NULL) {
spin_lock_irqsave(&phba->ct_ev_lock, flags);
lpfc_bsg_event_unref(evt);
lpfc_printf_log(phba, KERN_WARNING, LOG_LIBDFC,
"2614 Memory allocation failed for "
"CT event\n");
break;
}
if (phba->sli3_options & LPFC_SLI3_HBQ_ENABLED) {
/* take accumulated byte count from the last iocbq */
iocbq = list_entry(head.prev, typeof(*iocbq), list);
evt_dat->len = iocbq->iocb.unsli3.rcvsli3.acc_len;
} else {
list_for_each_entry(iocbq, &head, list) {
for (i = 0; i < iocbq->iocb.ulpBdeCount; i++)
evt_dat->len +=
iocbq->iocb.un.cont64[i].tus.f.bdeSize;
}
}
evt_dat->data = kzalloc(evt_dat->len, GFP_KERNEL);
if (evt_dat->data == NULL) {
lpfc_printf_log(phba, KERN_WARNING, LOG_LIBDFC,
"2615 Memory allocation failed for "
"CT event data, size %d\n",
evt_dat->len);
kfree(evt_dat);
spin_lock_irqsave(&phba->ct_ev_lock, flags);
lpfc_bsg_event_unref(evt);
spin_unlock_irqrestore(&phba->ct_ev_lock, flags);
goto error_ct_unsol_exit;
}
list_for_each_entry(iocbq, &head, list) {
size = 0;
if (phba->sli3_options & LPFC_SLI3_HBQ_ENABLED) {
bdeBuf1 = iocbq->context2;
bdeBuf2 = iocbq->context3;
}
for (i = 0; i < iocbq->iocb.ulpBdeCount; i++) {
if (phba->sli3_options &
LPFC_SLI3_HBQ_ENABLED) {
if (i == 0) {
hbqe = (struct lpfc_hbq_entry *)
&iocbq->iocb.un.ulpWord[0];
size = hbqe->bde.tus.f.bdeSize;
dmabuf = bdeBuf1;
} else if (i == 1) {
hbqe = (struct lpfc_hbq_entry *)
&iocbq->iocb.unsli3.
sli3Words[4];
size = hbqe->bde.tus.f.bdeSize;
dmabuf = bdeBuf2;
}
if ((offset + size) > evt_dat->len)
size = evt_dat->len - offset;
} else {
size = iocbq->iocb.un.cont64[i].
tus.f.bdeSize;
bde = &iocbq->iocb.un.cont64[i];
dma_addr = getPaddr(bde->addrHigh,
bde->addrLow);
dmabuf = lpfc_sli_ringpostbuf_get(phba,
pring, dma_addr);
}
if (!dmabuf) {
lpfc_printf_log(phba, KERN_ERR,
LOG_LIBDFC, "2616 No dmabuf "
"found for iocbq 0x%p\n",
iocbq);
kfree(evt_dat->data);
kfree(evt_dat);
spin_lock_irqsave(&phba->ct_ev_lock,
flags);
lpfc_bsg_event_unref(evt);
spin_unlock_irqrestore(
&phba->ct_ev_lock, flags);
goto error_ct_unsol_exit;
}
memcpy((char *)(evt_dat->data) + offset,
dmabuf->virt, size);
offset += size;
if (evt_req_id != SLI_CT_ELX_LOOPBACK &&
!(phba->sli3_options &
LPFC_SLI3_HBQ_ENABLED)) {
lpfc_sli_ringpostbuf_put(phba, pring,
dmabuf);
} else {
switch (cmd) {
case ELX_LOOPBACK_DATA:
diag_cmd_data_free(phba,
(struct lpfc_dmabufext *)
dmabuf);
break;
case ELX_LOOPBACK_XRI_SETUP:
if ((phba->sli_rev ==
LPFC_SLI_REV2) ||
(phba->sli3_options &
LPFC_SLI3_HBQ_ENABLED
)) {
lpfc_in_buf_free(phba,
dmabuf);
} else {
lpfc_post_buffer(phba,
pring,
1);
}
break;
default:
if (!(phba->sli3_options &
LPFC_SLI3_HBQ_ENABLED))
lpfc_post_buffer(phba,
pring,
1);
break;
}
}
}
}
spin_lock_irqsave(&phba->ct_ev_lock, flags);
if (phba->sli_rev == LPFC_SLI_REV4) {
evt_dat->immed_dat = phba->ctx_idx;
phba->ctx_idx = (phba->ctx_idx + 1) % 64;
/* Provide warning for over-run of the ct_ctx array */
if (phba->ct_ctx[evt_dat->immed_dat].flags &
UNSOL_VALID)
lpfc_printf_log(phba, KERN_WARNING, LOG_ELS,
"2717 CT context array entry "
"[%d] over-run: oxid:x%x, "
"sid:x%x\n", phba->ctx_idx,
phba->ct_ctx[
evt_dat->immed_dat].oxid,
phba->ct_ctx[
evt_dat->immed_dat].SID);
phba->ct_ctx[evt_dat->immed_dat].oxid =
piocbq->iocb.ulpContext;
phba->ct_ctx[evt_dat->immed_dat].SID =
piocbq->iocb.un.rcvels.remoteID;
phba->ct_ctx[evt_dat->immed_dat].flags = UNSOL_VALID;
} else
evt_dat->immed_dat = piocbq->iocb.ulpContext;
evt_dat->type = FC_REG_CT_EVENT;
list_add(&evt_dat->node, &evt->events_to_see);
if (evt_req_id == SLI_CT_ELX_LOOPBACK) {
wake_up_interruptible(&evt->wq);
lpfc_bsg_event_unref(evt);
break;
}
list_move(evt->events_to_see.prev, &evt->events_to_get);
lpfc_bsg_event_unref(evt);
job = evt->set_job;
evt->set_job = NULL;
if (job) {
job->reply->reply_payload_rcv_len = size;
/* make error code available to userspace */
job->reply->result = 0;
job->dd_data = NULL;
/* complete the job back to userspace */
spin_unlock_irqrestore(&phba->ct_ev_lock, flags);
job->job_done(job);
spin_lock_irqsave(&phba->ct_ev_lock, flags);
}
}
spin_unlock_irqrestore(&phba->ct_ev_lock, flags);
error_ct_unsol_exit:
if (!list_empty(&head))
list_del(&head);
if (evt_req_id == SLI_CT_ELX_LOOPBACK)