diff options
| author | Eric Nelson <eric.nelson@boundarydevices.com> | 2012-04-11 04:08:53 +0000 |
|---|---|---|
| committer | Anatolij Gustschin <agust@denx.de> | 2012-04-30 16:54:50 +0200 |
| commit | 9a800ac718abcac0aff6f98b922ceb236f411ffd (patch) | |
| tree | c9c19ed362ee0a65e1f88217d2dff20671ef559c | |
| parent | dec049d92427a4bf8bf4083f4ebaedbc5dc83e7b (diff) | |
fs/fat: align disk buffers on cache line to enable DMA and cache
Signed-off-by: Eric Nelson <eric.nelson@boundarydevices.com>
Acked-by: Mike Frysinger <vapier@gentoo.org>
| -rw-r--r-- | fs/fat/fat.c | 22 |
1 files changed, 12 insertions, 10 deletions
diff --git a/fs/fat/fat.c b/fs/fat/fat.c index 1f95eb4cafe..a3085b51d99 100644 --- a/fs/fat/fat.c +++ b/fs/fat/fat.c @@ -31,6 +31,8 @@ #include <fat.h> #include <asm/byteorder.h> #include <part.h> +#include <malloc.h> +#include <linux/compiler.h> /* * Convert a string to lowercase. @@ -62,7 +64,7 @@ static int disk_read(__u32 block, __u32 nr_blocks, void *buf) int fat_register_device (block_dev_desc_t * dev_desc, int part_no) { - unsigned char buffer[dev_desc->blksz]; + ALLOC_CACHE_ALIGN_BUFFER(unsigned char, buffer, dev_desc->blksz); /* First close any currently found FAT filesystem */ cur_dev = NULL; @@ -293,7 +295,7 @@ get_cluster (fsdata *mydata, __u32 clustnum, __u8 *buffer, return -1; } if (size % mydata->sect_size) { - __u8 tmpbuf[mydata->sect_size]; + ALLOC_CACHE_ALIGN_BUFFER(__u8, tmpbuf, mydata->sect_size); idx = size / mydata->sect_size; ret = disk_read(startsect + idx, 1, tmpbuf); @@ -428,8 +430,8 @@ static int slot2str (dir_slot *slotptr, char *l_name, int *idx) * into 'retdent' * Return 0 on success, -1 otherwise. */ -__attribute__ ((__aligned__ (__alignof__ (dir_entry)))) -__u8 get_vfatname_block[MAX_CLUSTSIZE]; +__u8 get_vfatname_block[MAX_CLUSTSIZE] + __aligned(ARCH_DMA_MINALIGN); static int get_vfatname (fsdata *mydata, int curclust, __u8 *cluster, @@ -533,8 +535,8 @@ static __u8 mkcksum (const char *str) * Get the directory entry associated with 'filename' from the directory * starting at 'startsect' */ -__attribute__ ((__aligned__ (__alignof__ (dir_entry)))) -__u8 get_dentfromdir_block[MAX_CLUSTSIZE]; +__u8 get_dentfromdir_block[MAX_CLUSTSIZE] + __aligned(ARCH_DMA_MINALIGN); static dir_entry *get_dentfromdir (fsdata *mydata, int startsect, char *filename, dir_entry *retdent, @@ -709,7 +711,7 @@ read_bootsectandvi (boot_sector *bs, volume_info *volinfo, int *fatsize) return -1; } - block = malloc(cur_dev->blksz); + block = memalign(ARCH_DMA_MINALIGN, cur_dev->blksz); if (block == NULL) { debug("Error: allocating block\n"); return -1; @@ -765,8 +767,8 @@ exit: return ret; } -__attribute__ ((__aligned__ (__alignof__ (dir_entry)))) -__u8 do_fat_read_block[MAX_CLUSTSIZE]; +__u8 do_fat_read_block[MAX_CLUSTSIZE] + __aligned(ARCH_DMA_MINALIGN); long do_fat_read (const char *filename, void *buffer, unsigned long maxsize, @@ -828,7 +830,7 @@ do_fat_read (const char *filename, void *buffer, unsigned long maxsize, } mydata->fatbufnum = -1; - mydata->fatbuf = malloc(FATBUFSIZE); + mydata->fatbuf = memalign(ARCH_DMA_MINALIGN, FATBUFSIZE); if (mydata->fatbuf == NULL) { debug("Error: allocating memory\n"); return -1; |