[PATCH] PATCH: libata. Add ->data_xfer method
We need to pass the device in order to do per device checks such as
32bit I/O enables. With the changes to include dev->ap we now don't have
to add parameters however just clean them up. Also add data_xfer methods
to the existing drivers except ata_piix (which is in the other block of
patches). If you reject the piix one just add a data_xfer to it...
Signed-off-by: Alan Cox <alan@redhat.com>
Signed-off-by: Jeff Garzik <jeff@garzik.org>
diff --git a/drivers/scsi/libata-core.c b/drivers/scsi/libata-core.c
index 45b6b29..074a46e 100644
--- a/drivers/scsi/libata-core.c
+++ b/drivers/scsi/libata-core.c
@@ -3527,7 +3527,7 @@
/**
* ata_mmio_data_xfer - Transfer data by MMIO
- * @ap: port to read/write
+ * @dev: device for this I/O
* @buf: data buffer
* @buflen: buffer length
* @write_data: read/write
@@ -3538,9 +3538,10 @@
* Inherited from caller.
*/
-static void ata_mmio_data_xfer(struct ata_port *ap, unsigned char *buf,
- unsigned int buflen, int write_data)
+void ata_mmio_data_xfer(struct ata_device *adev, unsigned char *buf,
+ unsigned int buflen, int write_data)
{
+ struct ata_port *ap = adev->ap;
unsigned int i;
unsigned int words = buflen >> 1;
u16 *buf16 = (u16 *) buf;
@@ -3572,7 +3573,7 @@
/**
* ata_pio_data_xfer - Transfer data by PIO
- * @ap: port to read/write
+ * @adev: device to target
* @buf: data buffer
* @buflen: buffer length
* @write_data: read/write
@@ -3583,9 +3584,10 @@
* Inherited from caller.
*/
-static void ata_pio_data_xfer(struct ata_port *ap, unsigned char *buf,
- unsigned int buflen, int write_data)
+void ata_pio_data_xfer(struct ata_device *adev, unsigned char *buf,
+ unsigned int buflen, int write_data)
{
+ struct ata_port *ap = adev->ap;
unsigned int words = buflen >> 1;
/* Transfer multiple of 2 bytes */
@@ -3610,39 +3612,6 @@
}
/**
- * ata_data_xfer - Transfer data from/to the data register.
- * @ap: port to read/write
- * @buf: data buffer
- * @buflen: buffer length
- * @do_write: read/write
- *
- * Transfer data from/to the device data register.
- *
- * LOCKING:
- * Inherited from caller.
- */
-
-static void ata_data_xfer(struct ata_port *ap, unsigned char *buf,
- unsigned int buflen, int do_write)
-{
- /* Make the crap hardware pay the costs not the good stuff */
- if (unlikely(ap->flags & ATA_FLAG_IRQ_MASK)) {
- unsigned long flags;
- local_irq_save(flags);
- if (ap->flags & ATA_FLAG_MMIO)
- ata_mmio_data_xfer(ap, buf, buflen, do_write);
- else
- ata_pio_data_xfer(ap, buf, buflen, do_write);
- local_irq_restore(flags);
- } else {
- if (ap->flags & ATA_FLAG_MMIO)
- ata_mmio_data_xfer(ap, buf, buflen, do_write);
- else
- ata_pio_data_xfer(ap, buf, buflen, do_write);
- }
-}
-
-/**
* ata_pio_sector - Transfer ATA_SECT_SIZE (512 bytes) of data.
* @qc: Command on going
*
@@ -3676,17 +3645,18 @@
if (PageHighMem(page)) {
unsigned long flags;
+ /* FIXME: use a bounce buffer */
local_irq_save(flags);
buf = kmap_atomic(page, KM_IRQ0);
/* do the actual data transfer */
- ata_data_xfer(ap, buf + offset, ATA_SECT_SIZE, do_write);
+ ap->ops->data_xfer(qc->dev, buf + offset, ATA_SECT_SIZE, do_write);
kunmap_atomic(buf, KM_IRQ0);
local_irq_restore(flags);
} else {
buf = page_address(page);
- ata_data_xfer(ap, buf + offset, ATA_SECT_SIZE, do_write);
+ ap->ops->data_xfer(qc->dev, buf + offset, ATA_SECT_SIZE, do_write);
}
qc->cursect++;
@@ -3742,7 +3712,7 @@
DPRINTK("send cdb\n");
WARN_ON(qc->dev->cdb_len < 12);
- ata_data_xfer(ap, qc->cdb, qc->dev->cdb_len, 1);
+ ap->ops->data_xfer(qc->dev, qc->cdb, qc->dev->cdb_len, 1);
ata_altstatus(ap); /* flush */
switch (qc->tf.protocol) {
@@ -3802,7 +3772,7 @@
"%u bytes trailing data\n", bytes);
for (i = 0; i < words; i++)
- ata_data_xfer(ap, (unsigned char*)pad_buf, 2, do_write);
+ ap->ops->data_xfer(qc->dev, (unsigned char*)pad_buf, 2, do_write);
ap->hsm_task_state = HSM_ST_LAST;
return;
@@ -3828,17 +3798,18 @@
if (PageHighMem(page)) {
unsigned long flags;
+ /* FIXME: use bounce buffer */
local_irq_save(flags);
buf = kmap_atomic(page, KM_IRQ0);
/* do the actual data transfer */
- ata_data_xfer(ap, buf + offset, count, do_write);
+ ap->ops->data_xfer(qc->dev, buf + offset, count, do_write);
kunmap_atomic(buf, KM_IRQ0);
local_irq_restore(flags);
} else {
buf = page_address(page);
- ata_data_xfer(ap, buf + offset, count, do_write);
+ ap->ops->data_xfer(qc->dev, buf + offset, count, do_write);
}
bytes -= count;
@@ -5702,6 +5673,8 @@
EXPORT_SYMBOL_GPL(ata_port_stop);
EXPORT_SYMBOL_GPL(ata_host_stop);
EXPORT_SYMBOL_GPL(ata_interrupt);
+EXPORT_SYMBOL_GPL(ata_mmio_data_xfer);
+EXPORT_SYMBOL_GPL(ata_pio_data_xfer);
EXPORT_SYMBOL_GPL(ata_qc_prep);
EXPORT_SYMBOL_GPL(ata_noop_qc_prep);
EXPORT_SYMBOL_GPL(ata_bmdma_setup);