au1xmmc: raise segment size limit.

Raise the DMA block size limit from 2048 bytes to the maximum supported
by the DMA controllers on the chip (64KB on Au1100, 4MB on Au1200).

This gives a very small performance boost and apparently fixes an oops
when MMC-DMA and network traffic are active at the same time.

Signed-off-by: Manuel Lauss <mano@roarinelk.homelinux.net>
Signed-off-by: Pierre Ossman <drzeus@drzeus.cx>
This commit is contained in:
Manuel Lauss 2008-07-29 10:10:49 +02:00 committed by Pierre Ossman
parent b41e9c7b8e
commit e491d230fd

View file

@ -61,7 +61,13 @@
/* Hardware definitions */
#define AU1XMMC_DESCRIPTOR_COUNT 1
#define AU1XMMC_DESCRIPTOR_SIZE 2048
/* max DMA seg size: 64KB on Au1100, 4MB on Au1200 */
#ifdef CONFIG_SOC_AU1100
#define AU1XMMC_DESCRIPTOR_SIZE 0x0000ffff
#else /* Au1200 */
#define AU1XMMC_DESCRIPTOR_SIZE 0x003fffff
#endif
#define AU1XMMC_OCR (MMC_VDD_27_28 | MMC_VDD_28_29 | MMC_VDD_29_30 | \
MMC_VDD_30_31 | MMC_VDD_31_32 | MMC_VDD_32_33 | \