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scsi: ibmvfc: Add cancel mad initialization helper

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Add a helper routine for initializing a Cancel MAD. This will be useful for
a channelized client that needs to send Cancel commands down every channel
commands were sent for a particular LUN.

Link: https://lore.kernel.org/r/20210114203148.246656-18-tyreld@linux.ibm.com
Reviewed-by: Brian King <brking@linux.vnet.ibm.com>
Signed-off-by: Tyrel Datwyler <tyreld@linux.ibm.com>
Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>
This commit is contained in:
Tyrel Datwyler 2021-01-14 14:31:44 -06:00 committed by Martin K. Petersen
parent b88a5d9b7f
commit a61236da7f
1 changed files with 40 additions and 28 deletions
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68
drivers/scsi/ibmvscsi/ibmvfc.c
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@ -2379,6 +2379,45 @@ static int ibmvfc_wait_for_ops(struct ibmvfc_host *vhost, void *device,
return SUCCESS;
}
static struct ibmvfc_event *ibmvfc_init_tmf(struct ibmvfc_queue *queue,
struct scsi_device *sdev,
int type)
{
struct ibmvfc_host *vhost = shost_priv(sdev->host);
struct scsi_target *starget = scsi_target(sdev);
struct fc_rport *rport = starget_to_rport(starget);
struct ibmvfc_event *evt;
struct ibmvfc_tmf *tmf;
evt = ibmvfc_get_event(queue);
ibmvfc_init_event(evt, ibmvfc_sync_completion, IBMVFC_MAD_FORMAT);
tmf = &evt->iu.tmf;
memset(tmf, 0, sizeof(*tmf));
if (ibmvfc_check_caps(vhost, IBMVFC_HANDLE_VF_WWPN)) {
tmf->common.version = cpu_to_be32(2);
tmf->target_wwpn = cpu_to_be64(rport->port_name);
} else {
tmf->common.version = cpu_to_be32(1);
}
tmf->common.opcode = cpu_to_be32(IBMVFC_TMF_MAD);
tmf->common.length = cpu_to_be16(sizeof(*tmf));
tmf->scsi_id = cpu_to_be64(rport->port_id);
int_to_scsilun(sdev->lun, &tmf->lun);
if (!ibmvfc_check_caps(vhost, IBMVFC_CAN_SUPPRESS_ABTS))
type &= ~IBMVFC_TMF_SUPPRESS_ABTS;
if (vhost->state == IBMVFC_ACTIVE)
tmf->flags = cpu_to_be32((type | IBMVFC_TMF_LUA_VALID));
else
tmf->flags = cpu_to_be32(((type & IBMVFC_TMF_SUPPRESS_ABTS) | IBMVFC_TMF_LUA_VALID));
tmf->cancel_key = cpu_to_be32((unsigned long)sdev->hostdata);
tmf->my_cancel_key = cpu_to_be32((unsigned long)starget->hostdata);
init_completion(&evt->comp);
return evt;
}
/**
* ibmvfc_cancel_all - Cancel all outstanding commands to the device
* @sdev: scsi device to cancel commands
@ -2393,9 +2432,6 @@ static int ibmvfc_wait_for_ops(struct ibmvfc_host *vhost, void *device,
static int ibmvfc_cancel_all(struct scsi_device *sdev, int type)
{
struct ibmvfc_host *vhost = shost_priv(sdev->host);
struct scsi_target *starget = scsi_target(sdev);
struct fc_rport *rport = starget_to_rport(starget);
struct ibmvfc_tmf *tmf;
struct ibmvfc_event *evt, *found_evt;
union ibmvfc_iu rsp;
int rsp_rc = -EBUSY;
@ -2422,32 +2458,8 @@ static int ibmvfc_cancel_all(struct scsi_device *sdev, int type)
}
if (vhost->logged_in) {
evt = ibmvfc_get_event(&vhost->crq);
ibmvfc_init_event(evt, ibmvfc_sync_completion, IBMVFC_MAD_FORMAT);
tmf = &evt->iu.tmf;
memset(tmf, 0, sizeof(*tmf));
if (ibmvfc_check_caps(vhost, IBMVFC_HANDLE_VF_WWPN)) {
tmf->common.version = cpu_to_be32(2);
tmf->target_wwpn = cpu_to_be64(rport->port_name);
} else {
tmf->common.version = cpu_to_be32(1);
}
tmf->common.opcode = cpu_to_be32(IBMVFC_TMF_MAD);
tmf->common.length = cpu_to_be16(sizeof(*tmf));
tmf->scsi_id = cpu_to_be64(rport->port_id);
int_to_scsilun(sdev->lun, &tmf->lun);
if (!ibmvfc_check_caps(vhost, IBMVFC_CAN_SUPPRESS_ABTS))
type &= ~IBMVFC_TMF_SUPPRESS_ABTS;
if (vhost->state == IBMVFC_ACTIVE)
tmf->flags = cpu_to_be32((type | IBMVFC_TMF_LUA_VALID));
else
tmf->flags = cpu_to_be32(((type & IBMVFC_TMF_SUPPRESS_ABTS) | IBMVFC_TMF_LUA_VALID));
tmf->cancel_key = cpu_to_be32((unsigned long)sdev->hostdata);
tmf->my_cancel_key = cpu_to_be32((unsigned long)starget->hostdata);
evt = ibmvfc_init_tmf(&vhost->crq, sdev, type);
evt->sync_iu = &rsp;
init_completion(&evt->comp);
rsp_rc = ibmvfc_send_event(evt, vhost, default_timeout);
}