Commit a61236da authored by Tyrel Datwyler's avatar Tyrel Datwyler Committed by Martin K. Petersen
Browse files

scsi: ibmvfc: Add cancel mad initialization helper 

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: default avatarBrian King <brking@linux.vnet.ibm.com>
Signed-off-by: default avatarTyrel Datwyler <tyreld@linux.ibm.com>
Signed-off-by: default avatarMartin K. Petersen <martin.petersen@oracle.com>
parent b88a5d9b

drivers/scsi/ibmvscsi/ibmvfc.c

+40 −28
Original line number Diff line number Diff line
@@ -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);

	}