On Wed, Feb 03, 2016 at 05:28:30PM -0600, Tyrel Datwyler wrote:
> The PAPR defines four valid header values for the first byte of a
> CRQ message. Namely, an unused/empty message (0x00), a valid
> command/response entry (0x80), a valid initialization entry (0xC0),
> and a transport event (0xFF). Define these values as enums and use
> them in the code in place of their magic number equivalents.
>
> Signed-off-by: Tyrel Datwyler <tyr...@linux.vnet.ibm.com>
> ---
> drivers/scsi/ibmvscsi/ibmvscsi.c | 14 +++++++-------
> drivers/scsi/ibmvscsi/viosrp.h | 7 +++++++
> 2 files changed, 14 insertions(+), 7 deletions(-)
>
> diff --git a/drivers/scsi/ibmvscsi/ibmvscsi.c
> b/drivers/scsi/ibmvscsi/ibmvscsi.c
> index adfef9d..176260d 100644
> --- a/drivers/scsi/ibmvscsi/ibmvscsi.c
> +++ b/drivers/scsi/ibmvscsi/ibmvscsi.c
> @@ -182,7 +182,7 @@ static struct viosrp_crq *crq_queue_next_crq(struct
> crq_queue *queue)
>
> spin_lock_irqsave(&queue->lock, flags);
> crq = &queue->msgs[queue->cur];
> - if (crq->valid & 0x80) {
> + if (crq->valid & VIOSRP_CRQ_VALID) {
> if (++queue->cur == queue->size)
> queue->cur = 0;
>
> @@ -231,7 +231,7 @@ static void ibmvscsi_task(void *data)
> /* Pull all the valid messages off the CRQ */
> while ((crq = crq_queue_next_crq(&hostdata->queue)) != NULL) {
> ibmvscsi_handle_crq(crq, hostdata);
> - crq->valid = 0x00;
> + crq->valid = VIOSRP_CRQ_FREE;
> }
>
> vio_enable_interrupts(vdev);
> @@ -239,7 +239,7 @@ static void ibmvscsi_task(void *data)
> if (crq != NULL) {
> vio_disable_interrupts(vdev);
> ibmvscsi_handle_crq(crq, hostdata);
> - crq->valid = 0x00;
> + crq->valid = VIOSRP_CRQ_FREE;
> } else {
> done = 1;
> }
> @@ -474,7 +474,7 @@ static int initialize_event_pool(struct event_pool *pool,
> struct srp_event_struct *evt = &pool->events[i];
> memset(&evt->crq, 0x00, sizeof(evt->crq));
> atomic_set(&evt->free, 1);
> - evt->crq.valid = 0x80;
> + evt->crq.valid = VIOSRP_CRQ_VALID;
> evt->crq.IU_length = cpu_to_be16(sizeof(*evt->xfer_iu));
> evt->crq.IU_data_ptr = cpu_to_be64(pool->iu_token +
> sizeof(*evt->xfer_iu) * i);
> @@ -1767,7 +1767,7 @@ static void ibmvscsi_handle_crq(struct viosrp_crq *crq,
> struct srp_event_struct *evt_struct =
> (__force struct srp_event_struct *)crq->IU_data_ptr;
> switch (crq->valid) {
> - case 0xC0: /* initialization */
> + case VIOSRP_CRQ_INIT: /* initialization */
> switch (crq->format) {
> case 0x01: /* Initialization message */
> dev_info(hostdata->dev, "partner initialized\n");
> @@ -1791,7 +1791,7 @@ static void ibmvscsi_handle_crq(struct viosrp_crq *crq,
> dev_err(hostdata->dev, "unknown crq message type:
> %d\n", crq->format);
> }
> return;
> - case 0xFF: /* Hypervisor telling us the connection is closed */
> + case VIOSRP_CRQ_TRANSPORT: /* Hypervisor telling us the connection
> is closed */
> scsi_block_requests(hostdata->host);
> atomic_set(&hostdata->request_limit, 0);
> if (crq->format == 0x06) {
> @@ -1807,7 +1807,7 @@ static void ibmvscsi_handle_crq(struct viosrp_crq *crq,
> ibmvscsi_reset_host(hostdata);
> }
> return;
> - case 0x80: /* real payload */
> + case VIOSRP_CRQ_VALID: /* real payload */
> break;
> default:
> dev_err(hostdata->dev, "got an invalid message type 0x%02x\n",
> diff --git a/drivers/scsi/ibmvscsi/viosrp.h b/drivers/scsi/ibmvscsi/viosrp.h
> index d1044e9..17f2de0 100644
> --- a/drivers/scsi/ibmvscsi/viosrp.h
> +++ b/drivers/scsi/ibmvscsi/viosrp.h
> @@ -51,6 +51,13 @@ union srp_iu {
> u8 reserved[SRP_MAX_IU_LEN];
> };
>
> +enum viosrp_crq_headers {
> + VIOSRP_CRQ_FREE = 0x00,
> + VIOSRP_CRQ_VALID = 0x80,
> + VIOSRP_CRQ_INIT = 0xC0,
> + VIOSRP_CRQ_TRANSPORT = 0xFF
> +};
> +
> enum viosrp_crq_formats {
> VIOSRP_SRP_FORMAT = 0x01,
> VIOSRP_MAD_FORMAT = 0x02,
> --
> 2.5.0
>
> --
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Reviewed-by: Johannes Thumshirn <jthumsh...@suse.de>
--
Johannes Thumshirn Storage
jthumsh...@suse.de +49 911 74053 689
SUSE LINUX GmbH, Maxfeldstr. 5, 90409 Nürnberg
GF: Felix Imendörffer, Jane Smithard, Graham Norton
HRB 21284 (AG Nürnberg)
Key fingerprint = EC38 9CAB C2C4 F25D 8600 D0D0 0393 969D 2D76 0850
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