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[SCSI] be2iscsi: Adding bsg interface for be2iscsi

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Signed-off-by: Jayamohan Kallickal <jayamohan.kallickal@emulex.com>
Signed-off-by: Mike Christie <michaelc@cs.wisc.edu>
Signed-off-by: James Bottomley <JBottomley@Parallels.com>
This commit is contained in:
Jayamohan Kallickal
2012-04-03 23:41:50 -05:00
committed by James Bottomley
parent 2177199d51
commit ffce3e2e8c
4 changed files with 162 additions and 1 deletions
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76
drivers/scsi/be2iscsi/be_main.c
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@@ -28,8 +28,11 @@
#include <linux/semaphore.h>
#include <linux/iscsi_boot_sysfs.h>
#include <linux/module.h>
#include <linux/bsg-lib.h>
#include <scsi/libiscsi.h>
#include <scsi/scsi_bsg_iscsi.h>
#include <scsi/scsi_netlink.h>
#include <scsi/scsi_transport_iscsi.h>
#include <scsi/scsi_transport.h>
#include <scsi/scsi_cmnd.h>
@@ -407,6 +410,8 @@ static struct scsi_host_template beiscsi_sht = {
.max_sectors = BEISCSI_MAX_SECTORS,
.cmd_per_lun = BEISCSI_CMD_PER_LUN,
.use_clustering = ENABLE_CLUSTERING,
.vendor_id = SCSI_NL_VID_TYPE_PCI | BE_VENDOR_ID,
};
static struct scsi_transport_template *beiscsi_scsi_transport;
@@ -4135,6 +4140,76 @@ static int beiscsi_task_xmit(struct iscsi_task *task)
return beiscsi_iotask(task, sg, num_sg, xferlen, writedir);
}
/**
* beiscsi_bsg_request - handle bsg request from ISCSI transport
* @job: job to handle
*/
static int beiscsi_bsg_request(struct bsg_job *job)
{
struct Scsi_Host *shost;
struct beiscsi_hba *phba;
struct iscsi_bsg_request *bsg_req = job->request;
int rc = -EINVAL;
unsigned int tag;
struct be_dma_mem nonemb_cmd;
struct be_cmd_resp_hdr *resp;
struct iscsi_bsg_reply *bsg_reply = job->reply;
unsigned short status, extd_status;
shost = iscsi_job_to_shost(job);
phba = iscsi_host_priv(shost);
switch (bsg_req->msgcode) {
case ISCSI_BSG_HST_VENDOR:
nonemb_cmd.va = pci_alloc_consistent(phba->ctrl.pdev,
job->request_payload.payload_len,
&nonemb_cmd.dma);
if (nonemb_cmd.va == NULL) {
SE_DEBUG(DBG_LVL_1, "Failed to allocate memory for "
"beiscsi_bsg_request\n");
return -EIO;
}
tag = mgmt_vendor_specific_fw_cmd(&phba->ctrl, phba, job,
&nonemb_cmd);
if (!tag) {
SE_DEBUG(DBG_LVL_1, "be_cmd_get_mac_addr Failed\n");
pci_free_consistent(phba->ctrl.pdev, nonemb_cmd.size,
nonemb_cmd.va, nonemb_cmd.dma);
return -EAGAIN;
} else
wait_event_interruptible(phba->ctrl.mcc_wait[tag],
phba->ctrl.mcc_numtag[tag]);
extd_status = (phba->ctrl.mcc_numtag[tag] & 0x0000FF00) >> 8;
status = phba->ctrl.mcc_numtag[tag] & 0x000000FF;
free_mcc_tag(&phba->ctrl, tag);
resp = (struct be_cmd_resp_hdr *)nonemb_cmd.va;
sg_copy_from_buffer(job->reply_payload.sg_list,
job->reply_payload.sg_cnt,
nonemb_cmd.va, (resp->response_length
+ sizeof(*resp)));
bsg_reply->reply_payload_rcv_len = resp->response_length;
bsg_reply->result = status;
bsg_job_done(job, bsg_reply->result,
bsg_reply->reply_payload_rcv_len);
pci_free_consistent(phba->ctrl.pdev, nonemb_cmd.size,
nonemb_cmd.va, nonemb_cmd.dma);
if (status || extd_status) {
SE_DEBUG(DBG_LVL_1, "be_cmd_get_mac_addr Failed"
" status = %d extd_status = %d\n",
status, extd_status);
return -EIO;
}
break;
default:
SE_DEBUG(DBG_LVL_1, "Unsupported bsg command: 0x%x\n",
bsg_req->msgcode);
break;
}
return rc;
}
static void beiscsi_quiesce(struct beiscsi_hba *phba)
{
struct hwi_controller *phwi_ctrlr;
@@ -4447,6 +4522,7 @@ struct iscsi_transport beiscsi_iscsi_transport = {
.ep_poll = beiscsi_ep_poll,
.ep_disconnect = beiscsi_ep_disconnect,
.session_recovery_timedout = iscsi_session_recovery_timedout,
.bsg_request = beiscsi_bsg_request,
};
static struct pci_driver beiscsi_pci_driver = {