From: Hante Meuleman <[email protected]> Host platforms such as routers supported by OpenWRT can support NVRAM reading directly from internal NVRAM store. The brcmfmac for one requires the complete nvram contents to select what needs to be sent to wireless device.
Reviewed-by: Arend Van Spriel <[email protected]> Reviewed-by: Franky (Zhenhui) Lin <[email protected]> Reviewed-by: Pieter-Paul Giesberts <[email protected]> Reviewed-by: Daniel (Deognyoun) Kim <[email protected]> Signed-off-by: Hante Meuleman <[email protected]> Signed-off-by: Arend van Spriel <[email protected]> --- Made a typo so it did not go the the linux-mips mailing list. Sorry for the noise. Regards, Arend --- arch/mips/bcm47xx/nvram.c | 40 +++++++++++++++++++++++++++++++++------- include/linux/bcm47xx_nvram.h | 15 +++++++++++++++ 2 files changed, 48 insertions(+), 7 deletions(-) diff --git a/arch/mips/bcm47xx/nvram.c b/arch/mips/bcm47xx/nvram.c index ba632ff..3bb7f41 100644 --- a/arch/mips/bcm47xx/nvram.c +++ b/arch/mips/bcm47xx/nvram.c @@ -138,6 +138,7 @@ static int nvram_init(void) #ifdef CONFIG_MTD struct mtd_info *mtd; struct nvram_header header; + struct nvram_header *pheader; size_t bytes_read; int err; @@ -146,20 +147,21 @@ static int nvram_init(void) return -ENODEV; err = mtd_read(mtd, 0, sizeof(header), &bytes_read, (uint8_t *)&header); - if (!err && header.magic == NVRAM_MAGIC) { - u8 *dst = (uint8_t *)nvram_buf; - size_t len = header.len; - - if (header.len > NVRAM_SPACE) { + if (!err && header.magic == NVRAM_MAGIC && + header.len > sizeof(header)) { + if (header.len > NVRAM_SPACE - 2) { pr_err("nvram on flash (%i bytes) is bigger than the reserved space in memory, will just copy the first %i bytes\n", header.len, NVRAM_SPACE); - len = NVRAM_SPACE; + header.len = NVRAM_SPACE - 2; } - err = mtd_read(mtd, 0, len, &bytes_read, dst); + err = mtd_read(mtd, 0, header.len, &bytes_read, + (u8 *)nvram_buf); if (err) return err; + pheader = (struct nvram_header *)nvram_buf; + pheader->len = header.len; return 0; } #endif @@ -221,3 +223,27 @@ int bcm47xx_nvram_gpio_pin(const char *name) return -ENOENT; } EXPORT_SYMBOL(bcm47xx_nvram_gpio_pin); + +char *bcm47xx_nvram_get_contents(size_t *nvram_size) +{ + int err; + char *nvram; + struct nvram_header *header; + + if (!nvram_buf[0]) { + err = nvram_init(); + if (err) + return NULL; + } + + header = (struct nvram_header *)nvram_buf; + *nvram_size = header->len - sizeof(struct nvram_header); + nvram = vmalloc(*nvram_size); + if (!nvram) + return NULL; + memcpy(nvram, &nvram_buf[sizeof(struct nvram_header)], *nvram_size); + + return nvram; +} +EXPORT_SYMBOL(bcm47xx_nvram_get_contents); + diff --git a/include/linux/bcm47xx_nvram.h b/include/linux/bcm47xx_nvram.h index b12b07e..c73927c 100644 --- a/include/linux/bcm47xx_nvram.h +++ b/include/linux/bcm47xx_nvram.h @@ -10,11 +10,17 @@ #include <linux/types.h> #include <linux/kernel.h> +#include <linux/vmalloc.h> #ifdef CONFIG_BCM47XX int bcm47xx_nvram_init_from_mem(u32 base, u32 lim); int bcm47xx_nvram_getenv(const char *name, char *val, size_t val_len); int bcm47xx_nvram_gpio_pin(const char *name); +char *bcm47xx_nvram_get_contents(size_t *val_len); +static inline void bcm47xx_nvram_release_contents(char *nvram) +{ + vfree(nvram); +}; #else static inline int bcm47xx_nvram_init_from_mem(u32 base, u32 lim) { @@ -29,6 +35,15 @@ static inline int bcm47xx_nvram_gpio_pin(const char *name) { return -ENOTSUPP; }; + +static inline char *bcm47xx_nvram_get_contents(size_t *val_len) +{ + return NULL; +}; + +static inline void bcm47xx_nvram_release_contents(char *nvram) +{ +}; #endif #endif /* __BCM47XX_NVRAM_H */ -- 1.9.1 -- To unsubscribe from this list: send the line "unsubscribe linux-wireless" in the body of a message to [email protected] More majordomo info at http://vger.kernel.org/majordomo-info.html
