MFp4:

Introduce ATA_CAM kernel option, turning ata(4) controller drivers into
cam(4) interface modules. When enabled, this options deprecates all ata(4)
peripheral drivers (ad, acd, ...) and interfaces and allows cam(4) drivers
(ada, cd, ...) and interfaces to be natively used instead.

As side effect of this, ata(4) mode setting code was completely rewritten
to make controller API more strict and permit above change. While doing
this, SATA revision was separated from PATA mode. It allows DMA-incapable
SATA devices to operate and makes hw.ata.atapi_dma tunable work again.

Also allow ata(4) controller drivers (except some specific or broken ones)
to handle larger data transfers. Previous constraint of 64K was artificial
and is not really required by PCI ATA BM specification or hardware.

Submitted by:	nwitehorn (powerpc part)

1 files changed, 13 insertions, 6 deletions

diff --git a/sys/dev/ata/ata_if.m b/sys/dev/ata/ata_if.m
index 8fcc3f2..a1775ac 100644
--- a/sys/dev/ata/ata_if.m
+++ b/sys/dev/ata/ata_if.m
@@ -57,17 +57,24 @@ HEADER {
 };
 
 CODE {
-	static void ata_null_setmode(device_t parent, device_t dev)
+	static int ata_null_setmode(device_t dev, int target, int mode)
 	{
-	    struct ata_device *atadev = device_get_softc(dev);
 
-	    atadev->mode = ata_limit_mode(dev, atadev->mode, ATA_PIO_MAX);
+		if (mode > ATA_PIO_MAX)
+			return (ATA_PIO_MAX);
+		return (mode);
 	}
 };
-METHOD void setmode {
-    device_t    channel;
+METHOD int setmode {
+    device_t    dev;
+    int		target;
+    int		mode;
+}  DEFAULT ata_null_setmode;
+
+METHOD int getrev {
     device_t    dev;
-}  DEFAULT ata_null_setmode;;
+    int		target;
+};
 
 METHOD void reset {
     device_t    channel;