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au1xmmc: raise segment size limit.

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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
1 changed files with 7 additions and 1 deletions
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8
drivers/mmc/host/au1xmmc.c
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@ -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 | \