OpenCloudOS-Kernel/drivers/mtd
Abhishek Sahu 6192ff7a44 mtd: nand: qcom: DMA mapping support for register read buffer
The EBI2 NAND controller directly remaps register read buffer with
dma_map_sg and DMA address of this buffer will be passed to DMA
API’s. While, on QPIC NAND controller, which uses BAM DMA, we read
the controller registers by preparing a BAM command descriptor. This
command descriptor requires the

  - controller register address
  - the DMA address in which we want to store the value read
    back from the controller register.

This command descriptor will be remapped with dma_map_sg
and its DMA address will be passed to DMA API’s. Therefore,
it's required that we also map our register read buffer for
DMA (using dma_map_single). We use the returned DMA address
for preparing entries in our command descriptor.

This patch adds the DMA mapping support for register read
buffer. This buffer will be DMA mapped during allocation
time. Before starting of any operation, this buffer will
be synced for device operation and after operation
completion, it will be synced again for CPU.

Reviewed-by: Archit Taneja <architt@codeaurora.org>
Signed-off-by: Abhishek Sahu <absahu@codeaurora.org>
Signed-off-by: Boris Brezillon <boris.brezillon@free-electrons.com>
2017-08-23 16:49:25 +02:00
..
chips mtd: cfi_cmdset_0020: Drop unnecessary static 2017-05-11 11:49:20 -07:00
devices mtd: st_spi_fsm: Handle clk_prepare_enable/clk_disable_unprepare. 2017-08-23 16:49:20 +02:00
lpddr mtd: lpddr: show parent device in sysfs 2015-10-13 09:21:17 -07:00
maps mtd: physmap_of: Drop unnecessary static 2017-05-11 11:49:21 -07:00
nand mtd: nand: qcom: DMA mapping support for register read buffer 2017-08-23 16:49:25 +02:00
onenand mtd: silence some uninitialized variable warnings 2016-07-09 18:14:39 -07:00
parsers mtd: parsers: trx: fix pr_err format for printing offset 2017-06-23 10:47:54 -07:00
spi-nor mtd: spi-nor: cqspi: remove duplicate const 2017-06-27 21:28:52 +02:00
tests mtd: subpagetest: fix wrong written check in function write_eraseblock2 2017-06-08 16:39:21 -07:00
ubi driver core patches for 4.13-rc1 2017-07-03 20:27:48 -07:00
Kconfig mtd: extract TRX parser out of bcm47xxpart into a separated module 2017-06-22 13:13:10 -07:00
Makefile mtd: extract TRX parser out of bcm47xxpart into a separated module 2017-06-22 13:13:10 -07:00
afs.c mtd: partitions: make parsers return 'const' partition arrays 2015-12-09 10:21:57 -08:00
ar7part.c mtd: partitions: make parsers return 'const' partition arrays 2015-12-09 10:21:57 -08:00
bcm47xxpart.c mtd: extract TRX parser out of bcm47xxpart into a separated module 2017-06-22 13:13:10 -07:00
bcm63xxpart.c mtd: bcm63xxpart: give width specifier an 'int', not 'size_t' 2016-03-07 13:13:58 -08:00
cmdlinepart.c mtd: partitions: make parsers return 'const' partition arrays 2015-12-09 10:21:57 -08:00
ftl.c Replace <asm/uaccess.h> with <linux/uaccess.h> globally 2016-12-24 11:46:01 -08:00
inftlcore.c Replace <asm/uaccess.h> with <linux/uaccess.h> globally 2016-12-24 11:46:01 -08:00
inftlmount.c Replace <asm/uaccess.h> with <linux/uaccess.h> globally 2016-12-24 11:46:01 -08:00
mtd_blkdevs.c block: don't set bounce limit in blk_init_queue 2017-06-27 12:13:45 -06:00
mtdblock.c mtd: mtdblock: remove the needless mtdblks_lock 2015-01-07 12:51:56 -08:00
mtdblock_ro.c
mtdchar.c mtd: Fix typo: "occured" -> "occurred" 2017-02-08 14:24:57 -08:00
mtdconcat.c mtd: create an mtd_ooblayout_ops struct to ease ECC layout definition 2016-04-19 22:05:55 +02:00
mtdcore.c mtd: Fix check in mtd_unpoint() 2017-07-07 17:57:59 -07:00
mtdcore.h mtd: partitions: support a cleanup callback for parsers 2015-12-09 14:57:44 -08:00
mtdoops.c
mtdpart.c mtd: partitions: fixup some allocate_partition() whitespace 2017-06-23 10:52:15 -07:00
mtdsuper.c fs: Remove SB_I_DYNBDI flag 2017-04-20 12:09:55 -06:00
mtdswap.c mtd: mtdswap: use MTDSWAP_ECNT_MIN/MAX 2017-04-19 13:12:02 -07:00
nftlcore.c Replace <asm/uaccess.h> with <linux/uaccess.h> globally 2016-12-24 11:46:01 -08:00
nftlmount.c mtd: nftl: reorganize operations in condition check 2015-01-09 15:26:29 -08:00
ofpart.c drivers/mtd: Convert remaining uses of pr_warning to pr_warn 2017-04-19 13:10:54 -07:00
redboot.c mtd: partitions: make parsers return 'const' partition arrays 2015-12-09 10:21:57 -08:00
rfd_ftl.c
sm_ftl.c treewide: Fix typos in printk 2016-04-18 11:23:24 +02:00
sm_ftl.h
ssfdc.c mtd: Replace if and BUG with BUG_ON 2016-07-09 18:48:54 -07:00