pata_hpt3x3: major reworking and testing

The HPT343/345 (aka 363) is a bit of a warped device.  For many setups you
need to access the other registers via BAR4 offsets.  PIO is now rock
solid, DMA isn't.  Unfortunately the drivers/ide hpt34x driver is
completely broken so doesn't help further debug.

Signed-off-by: Alan Cox <alan@redhat.com>
Cc: Bartlomiej Zolnierkiewicz <bzolnier@gmail.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Jeff Garzik <jeff@garzik.org>

1 files changed, 9 insertions, 1 deletions

diff --git a/drivers/ata/Kconfig b/drivers/ata/Kconfig
index 4ad8675f5a16..d8046a113c37 100644
--- a/drivers/ata/Kconfig
+++ b/drivers/ata/Kconfig
@@ -309,7 +309,7 @@ config PATA_HPT3X2N
           If unsure, say N.
 
 config PATA_HPT3X3
-        tristate "HPT 343/363 PATA support (Experimental)"
+        tristate "HPT 343/363 PATA support"
         depends on PCI
         help
           This option enables support for the HPT 343/363
@@ -317,6 +317,14 @@ config PATA_HPT3X3
 
           If unsure, say N.
 
+config PATA_HPT3X3_DMA
+        bool "HPT 343/363 DMA support (Experimental)"
+        depends on PATA_HPT3X3
+        help
+          This option enables DMA support for the HPT343/363
+          controllers. Enable with care as there are still some
+          problems with DMA on this chipset.
+
 config PATA_ISAPNP
         tristate "ISA Plug and Play PATA support (Experimental)"
         depends on EXPERIMENTAL && ISAPNP