{
struct ata_port *ap = qc->ap;
+ /* Use polling pio if the LLD doesn't handle
+ * interrupt driven pio and atapi CDB interrupt.
+ */
+ if (ap->flags & ATA_FLAG_PIO_POLLING) {
+ switch (qc->tf.protocol) {
+ case ATA_PROT_PIO:
+ case ATA_PROT_ATAPI:
+ case ATA_PROT_ATAPI_NODATA:
+ qc->tf.flags |= ATA_TFLAG_POLLING;
+ break;
+ case ATA_PROT_ATAPI_DMA:
+ if (qc->dev->flags & ATA_DFLAG_CDB_INTR)
+ BUG();
+ break;
+ default:
+ break;
+ }
+ }
+
+ /* select the device */
ata_dev_select(ap, qc->dev->devno, 1, 0);
+ /* start the command */
switch (qc->tf.protocol) {
case ATA_PROT_NODATA:
- ata_tf_to_host_nolock(ap, &qc->tf);
+ if (qc->tf.flags & ATA_TFLAG_POLLING)
+ ata_qc_set_polling(qc);
+
+ ata_tf_to_host(ap, &qc->tf);
+ ap->hsm_task_state = HSM_ST_LAST;
+
+ if (qc->tf.flags & ATA_TFLAG_POLLING)
+ queue_work(ata_wq, &ap->pio_task);
+
break;
case ATA_PROT_DMA:
ap->ops->tf_load(ap, &qc->tf); /* load tf registers */
ap->ops->bmdma_setup(qc); /* set up bmdma */
ap->ops->bmdma_start(qc); /* initiate bmdma */
+ ap->hsm_task_state = HSM_ST_LAST;
break;
- case ATA_PROT_PIO: /* load tf registers, initiate polling pio */
- ata_qc_set_polling(qc);
- ata_tf_to_host(ap, &qc->tf);
- ap->hsm_task_state = HSM_ST;
- queue_work(ata_wq, &ap->pio_task);
- break;
+ case ATA_PROT_PIO:
+ if (qc->tf.flags & ATA_TFLAG_POLLING)
+ ata_qc_set_polling(qc);
- ata_tf_to_host_nolock(ap, &qc->tf);
- case ATA_PROT_ATAPI:
- ata_qc_set_polling(qc);
+ ata_tf_to_host(ap, &qc->tf);
- queue_work(ata_wq, &ap->packet_task);
+
+ if (qc->tf.flags & ATA_TFLAG_WRITE) {
+ /* PIO data out protocol */
+ ap->hsm_task_state = HSM_ST_FIRST;
+ queue_work(ata_wq, &ap->dataout_task);
+
+ /* always send first data block using
+ * the ata_dataout_task() codepath.
+ */
+ } else {
+ /* PIO data in protocol */
+ ap->hsm_task_state = HSM_ST;
+
+ if (qc->tf.flags & ATA_TFLAG_POLLING)
+ queue_work(ata_wq, &ap->pio_task);
+
+ /* if polling, ata_pio_task() handles the rest.
+ * otherwise, interrupt handler takes over from here.
+ */
+ }
+
break;
+ case ATA_PROT_ATAPI:
case ATA_PROT_ATAPI_NODATA:
- ap->flags |= ATA_FLAG_NOINTR;
+ if (qc->tf.flags & ATA_TFLAG_POLLING)
+ ata_qc_set_polling(qc);
+
- ata_tf_to_host_nolock(ap, &qc->tf);
+ ata_tf_to_host(ap, &qc->tf);
- queue_work(ata_wq, &ap->packet_task);
+ ap->hsm_task_state = HSM_ST_FIRST;
+
+ /* send cdb by polling if no cdb interrupt */
+ if ((!(qc->dev->flags & ATA_DFLAG_CDB_INTR)) ||
+ (qc->tf.flags & ATA_TFLAG_POLLING))
+ queue_work(ata_wq, &ap->dataout_task);
break;
case ATA_PROT_ATAPI_DMA: