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[MTD] NAND: Combined oob buffer so it's contiguous with data

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Ditch the separate oobrbuf and oobwbuf fields from the chip buffers,
and use only a single buffer immediately after the data. This accommodates
NAND controllers such as the OLPC CAFÉ chip, which can't do scatter/gather
DMA so needs the OOB buffer to be contiguous with the data, for both read
and write.

Signed-off-by: David Woodhouse <dwmw2@infradead.org>
This commit is contained in:
David Woodhouse
2006-10-21 17:09:53 +01:00
parent 513b046c96
commit 7dcdcbef5d
2 changed files with 6 additions and 15 deletions
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6
include/linux/mtd/nand.h
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@@ -286,9 +286,7 @@ struct nand_ecc_ctrl {
* struct nand_buffers - buffer structure for read/write
* @ecccalc: buffer for calculated ecc
* @ecccode: buffer for ecc read from flash
* @oobwbuf: buffer for write oob data
* @databuf: buffer for data - dynamically sized
* @oobrbuf: buffer to read oob data
*
* Do not change the order of buffers. databuf and oobrbuf must be in
* consecutive order.
@@ -296,9 +294,7 @@ struct nand_ecc_ctrl {
struct nand_buffers {
uint8_t ecccalc[NAND_MAX_OOBSIZE];
uint8_t ecccode[NAND_MAX_OOBSIZE];
uint8_t oobwbuf[NAND_MAX_OOBSIZE];
uint8_t databuf[NAND_MAX_PAGESIZE];
uint8_t oobrbuf[NAND_MAX_OOBSIZE];
uint8_t databuf[NAND_MAX_PAGESIZE + NAND_MAX_OOBSIZE];
};
/**