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https://github.com/AuxXxilium/linux_dsm_epyc7002.git
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6054d4d563
This patch enable writing nand flash via NFC SRAM. It will minimize the CPU overhead. The SRAM write only support ECC_NONE and ECC_HW with PMECC. To enable this NFC write by SRAM feature, you can add a string in dts under NFC driver node. This driver has been tested on SAMA5D3X-EK with JFFS2, YAFFS2, UBIFS and mtd-utils. Here is part of mtd_speedtest (writing test) result, compare with non-NFC writing, it reduces %65 cpu load with loss %12 speed. - commands use to test: # insmod /mnt/mtd_speedtest.ko dev=2 & # top -n 30 -d 1 | grep speedtest - test result: ================================================= mtd_speedtest: MTD device: 2 mtd_speedtest: MTD device size 41943040, eraseblock size 131072, page size 2048, count of eraseblocks 320, pages per eraseblock 64, OOB size 64 mtd_speedtest: testing eraseblock write speed 509 495 root D 1164 0% 7% insmod /mnt/mtd_speedtest.ko dev=2 509 495 root D 1164 0% 8% insmod /mnt/mtd_speedtest.ko dev=2 509 495 root R 1164 0% 5% insmod /mnt/mtd_speedtest.ko dev=2 mtd_speedtest: eraseblock write speed is 5194 KiB/s mtd_speedtest: testing page write speed 509 495 root D 1164 0% 32% insmod /mnt/mtd_speedtest.ko dev=2 509 495 root D 1164 0% 27% insmod /mnt/mtd_speedtest.ko dev=2 509 495 root D 1164 0% 25% insmod /mnt/mtd_speedtest.ko dev=2 509 495 root D 1164 0% 30% insmod /mnt/mtd_speedtest.ko dev=2 mtd_speedtest: page write speed is 5024 KiB/s Signed-off-by: Josh Wu <josh.wu@atmel.com> Acked-by: Jean-Christophe PLAGNIOL-VILLARD <plagnioj@jcrosoft.com> Signed-off-by: Artem Bityutskiy <artem.bityutskiy@linux.intel.com> Signed-off-by: David Woodhouse <David.Woodhouse@intel.com> |
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| .. | ||
| bcm47xxnflash | ||
| gpmi-nand | ||
| alauda.c | ||
| ams-delta.c | ||
| atmel_nand_ecc.h | ||
| atmel_nand_nfc.h | ||
| atmel_nand.c | ||
| au1550nd.c | ||
| bf5xx_nand.c | ||
| cafe_nand.c | ||
| cmx270_nand.c | ||
| cs553x_nand.c | ||
| davinci_nand.c | ||
| denali_dt.c | ||
| denali_pci.c | ||
| denali.c | ||
| denali.h | ||
| diskonchip.c | ||
| docg4.c | ||
| fsl_elbc_nand.c | ||
| fsl_ifc_nand.c | ||
| fsl_upm.c | ||
| fsmc_nand.c | ||
| gpio.c | ||
| jz4740_nand.c | ||
| Kconfig | ||
| lpc32xx_mlc.c | ||
| lpc32xx_slc.c | ||
| Makefile | ||
| mpc5121_nfc.c | ||
| mxc_nand.c | ||
| nand_base.c | ||
| nand_bbt.c | ||
| nand_bch.c | ||
| nand_ecc.c | ||
| nand_ids.c | ||
| nandsim.c | ||
| ndfc.c | ||
| nuc900_nand.c | ||
| omap2.c | ||
| orion_nand.c | ||
| pasemi_nand.c | ||
| plat_nand.c | ||
| pxa3xx_nand.c | ||
| r852.c | ||
| r852.h | ||
| s3c2410.c | ||
| sh_flctl.c | ||
| sharpsl.c | ||
| sm_common.c | ||
| sm_common.h | ||
| socrates_nand.c | ||
| tmio_nand.c | ||
| txx9ndfmc.c | ||
| xway_nand.c | ||