diff options
Diffstat (limited to 'src/vboot')
| -rw-r--r-- | src/vboot/Kconfig | 3 | ||||
| -rw-r--r-- | src/vboot/vbnv_flash.c | 82 |
2 files changed, 16 insertions, 69 deletions
diff --git a/src/vboot/Kconfig b/src/vboot/Kconfig index 08381677e3..f3df7c524b 100644 --- a/src/vboot/Kconfig +++ b/src/vboot/Kconfig @@ -29,7 +29,7 @@ config VBOOT_VBNV_CMOS config VBOOT_VBNV_CMOS_BACKUP_TO_FLASH bool "Back up Vboot non-volatile storage from CMOS to flash." default n - depends on VBOOT_VBNV_CMOS + depends on VBOOT_VBNV_CMOS && BOOT_DEVICE_SUPPORTS_WRITES help Vboot non-volatile storage data will be backed up from CMOS to flash and restored from flash if the CMOS is invalid due to power loss. @@ -42,6 +42,7 @@ config VBOOT_VBNV_EC config VBOOT_VBNV_FLASH def_bool n + depends on BOOT_DEVICE_SUPPORTS_WRITES help VBNV is stored in flash storage diff --git a/src/vboot/vbnv_flash.c b/src/vboot/vbnv_flash.c index 717ff23819..d061228a2a 100644 --- a/src/vboot/vbnv_flash.c +++ b/src/vboot/vbnv_flash.c @@ -17,7 +17,6 @@ #include <assert.h> #include <commonlib/region.h> #include <console/console.h> -#include <spi_flash.h> #include <string.h> #include <vb2_api.h> #include <vboot_nvstorage.h> @@ -31,17 +30,14 @@ struct vbnv_flash_ctx { /* VBNV flash is initialized */ int initialized; - /* Offset of the current nvdata in SPI flash */ + /* Offset of the current nvdata in flash */ int blob_offset; - /* Offset of the topmost nvdata blob in SPI flash */ + /* Offset of the topmost nvdata blob in flash */ int top_offset; - /* SPI flash handler used when saving data */ - struct spi_flash *flash; - - /* FMAP descriptor of the NVRAM area */ - struct region_device region; + /* Region to store and retrieve the VBNV contents. */ + struct region_device vbnv_dev; /* Cache of the current nvdata */ uint8_t cache[BLOB_SIZE]; @@ -66,13 +62,14 @@ static inline int can_overwrite(uint8_t current, uint8_t new) static int init_vbnv(void) { struct vbnv_flash_ctx *ctx = car_get_var_ptr(&vbnv_flash); + struct region_device *rdev = &ctx->vbnv_dev; uint8_t buf[BLOB_SIZE]; uint8_t empty_blob[BLOB_SIZE]; int offset; int i; - if (vboot_named_region_device("RW_NVRAM", &ctx->region) || - region_device_sz(&ctx->region) < BLOB_SIZE) { + if (vboot_named_region_device_rw("RW_NVRAM", rdev) || + region_device_sz(rdev) < BLOB_SIZE) { printk(BIOS_ERR, "%s: failed to locate NVRAM\n", __func__); return 1; } @@ -82,7 +79,7 @@ static int init_vbnv(void) empty_blob[i] = erase_value(); offset = 0; - ctx->top_offset = region_device_sz(&ctx->region) - BLOB_SIZE; + ctx->top_offset = region_device_sz(rdev) - BLOB_SIZE; /* * after the loop, offset is supposed to point the blob right before @@ -91,7 +88,7 @@ static int init_vbnv(void) * used. */ for (i = 0; i <= ctx->top_offset; i += BLOB_SIZE) { - if (rdev_readat(&ctx->region, buf, i, BLOB_SIZE) < 0) { + if (rdev_readat(rdev, buf, i, BLOB_SIZE) < 0) { printk(BIOS_ERR, "failed to read nvdata\n"); return 1; } @@ -101,7 +98,7 @@ static int init_vbnv(void) } /* reread the nvdata and write it to the cache */ - if (rdev_readat(&ctx->region, ctx->cache, offset, BLOB_SIZE) < 0) { + if (rdev_readat(rdev, ctx->cache, offset, BLOB_SIZE) < 0) { printk(BIOS_ERR, "failed to read nvdata\n"); return 1; } @@ -112,61 +109,12 @@ static int init_vbnv(void) return 0; } -static void vbnv_is_erasable(void) -{ - /* - * We check whether the region is aligned or not in advance to ensure - * we can erase the region when it's all used up. - * - * The region offset & size are determined by fmap.dts yet the check can - * be confidently done only by the spi flash driver. We use the same - * check as the one used by spi_flash_cmd_erase, which happens to be - * common to all the spi flash parts we support. - * - * TODO: Check by calling can_erase implemented by each spi flash driver - */ - struct vbnv_flash_ctx *ctx = car_get_var_ptr(&vbnv_flash); - - assert(!(region_device_offset(&ctx->region) % ctx->flash->sector_size)); - assert(!(region_device_sz(&ctx->region) % ctx->flash->sector_size)); -} - -static int vbnv_flash_probe(void) -{ - struct vbnv_flash_ctx *ctx = car_get_var_ptr(&vbnv_flash); - - if (!ctx->flash) { - ctx->flash = - spi_flash_probe(CONFIG_BOOT_DEVICE_SPI_FLASH_BUS, 0); - if (!ctx->flash) { - printk(BIOS_ERR, "failed to probe spi flash\n"); - return 1; - } - /* - * Called here instead of init_vbnv to reduce impact on boot - * speed. - */ - vbnv_is_erasable(); - } - - /* - * Handle the case where spi_flash_probe returns a CAR_GLOBAL - * in early execution on x86 but then later is moved to RAM. - */ - ctx->flash = car_get_var_ptr(ctx->flash); - - return 0; -} - static int erase_nvram(void) { struct vbnv_flash_ctx *ctx = car_get_var_ptr(&vbnv_flash); + const struct region_device *rdev = &ctx->vbnv_dev; - if (vbnv_flash_probe()) - return 1; - - if (ctx->flash->erase(ctx->flash, region_device_offset(&ctx->region), - region_device_sz(&ctx->region))) { + if (rdev_eraseat(rdev, 0, region_device_sz(rdev)) < 0) { printk(BIOS_ERR, "failed to erase nvram\n"); return 1; } @@ -191,6 +139,7 @@ void save_vbnv_flash(const uint8_t *vbnv_copy) struct vbnv_flash_ctx *ctx = car_get_var_ptr(&vbnv_flash); int new_offset; int i; + const struct region_device *rdev = &ctx->vbnv_dev; if (!ctx->initialized) if (init_vbnv()) @@ -216,10 +165,7 @@ void save_vbnv_flash(const uint8_t *vbnv_copy) } } - if (!vbnv_flash_probe() && - !ctx->flash->write(ctx->flash, - region_device_offset(&ctx->region) + new_offset, - BLOB_SIZE, vbnv_copy)) { + if (rdev_writeat(rdev, vbnv_copy, new_offset, BLOB_SIZE) < 0) { /* write was successful. safely move pointer forward */ ctx->blob_offset = new_offset; memcpy(ctx->cache, vbnv_copy, BLOB_SIZE); |