User needs to call several functions to create the ramdisk with blkmap. This adds the utility function to create blkmap device and mount the ramdisk.
Signed-off-by: Masahisa Kojima masahisa.kojima@linaro.org --- drivers/block/Makefile | 1 + drivers/block/blkmap.c | 15 ---------- drivers/block/blkmap_helper.c | 53 +++++++++++++++++++++++++++++++++++ include/blkmap.h | 29 +++++++++++++++++++ 4 files changed, 83 insertions(+), 15 deletions(-) create mode 100644 drivers/block/blkmap_helper.c
diff --git a/drivers/block/Makefile b/drivers/block/Makefile index a161d145fd..c3ccfc03e5 100644 --- a/drivers/block/Makefile +++ b/drivers/block/Makefile @@ -15,6 +15,7 @@ endif obj-$(CONFIG_SANDBOX) += sandbox.o host-uclass.o host_dev.o obj-$(CONFIG_$(SPL_TPL_)BLOCK_CACHE) += blkcache.o obj-$(CONFIG_BLKMAP) += blkmap.o +obj-$(CONFIG_BLKMAP) += blkmap_helper.o
obj-$(CONFIG_EFI_MEDIA) += efi-media-uclass.o obj-$(CONFIG_EFI_MEDIA_SANDBOX) += sb_efi_media.o diff --git a/drivers/block/blkmap.c b/drivers/block/blkmap.c index 2bb0acc20f..4e95997f61 100644 --- a/drivers/block/blkmap.c +++ b/drivers/block/blkmap.c @@ -66,21 +66,6 @@ struct blkmap_slice { void (*destroy)(struct blkmap *bm, struct blkmap_slice *bms); };
-/** - * struct blkmap - Block map - * - * Data associated with a blkmap. - * - * @label: Human readable name of this blkmap - * @blk: Underlying block device - * @slices: List of slices associated with this blkmap - */ -struct blkmap { - char *label; - struct udevice *blk; - struct list_head slices; -}; - static bool blkmap_slice_contains(struct blkmap_slice *bms, lbaint_t blknr) { return (blknr >= bms->blknr) && (blknr < (bms->blknr + bms->blkcnt)); diff --git a/drivers/block/blkmap_helper.c b/drivers/block/blkmap_helper.c new file mode 100644 index 0000000000..0f80035f57 --- /dev/null +++ b/drivers/block/blkmap_helper.c @@ -0,0 +1,53 @@ +// SPDX-License-Identifier: GPL-2.0+ +/* + * blkmap helper function + * + * Copyright (c) 2023, Linaro Limited + */ + +#include <blk.h> +#include <blkmap.h> +#include <dm/device.h> +#include <dm/device-internal.h> + +int blkmap_create_ramdisk(const char *label, ulong image_addr, int image_size, + struct udevice **devp) +{ + int ret; + lbaint_t blknum; + struct blkmap *bm; + struct blk_desc *desc; + struct udevice *bm_dev; + + ret = blkmap_create(label, &bm_dev); + if (ret) { + log_err("failed to create blkmap\n"); + return ret; + } + + bm = dev_get_plat(bm_dev); + desc = dev_get_uclass_plat(bm->blk); + blknum = image_size >> desc->log2blksz; + ret = blkmap_map_pmem(bm_dev, 0, blknum, image_addr); + if (ret) { + log_err("Unable to map %#llx at block %d : %d\n", + (unsigned long long)image_addr, 0, ret); + goto err; + } + log_info("Block %d+0x" LBAF " mapped to %#llx\n", 0, blknum, + (unsigned long long)image_addr); + + ret = device_probe(bm->blk); + if (ret) + goto err; + + if (devp) + *devp = bm_dev; + + return 0; + +err: + blkmap_destroy(bm_dev); + + return ret; +} diff --git a/include/blkmap.h b/include/blkmap.h index af54583c7d..0d87e6db6b 100644 --- a/include/blkmap.h +++ b/include/blkmap.h @@ -7,6 +7,23 @@ #ifndef _BLKMAP_H #define _BLKMAP_H
+#include <dm/lists.h> + +/** + * struct blkmap - Block map + * + * Data associated with a blkmap. + * + * @label: Human readable name of this blkmap + * @blk: Underlying block device + * @slices: List of slices associated with this blkmap + */ +struct blkmap { + char *label; + struct udevice *blk; + struct list_head slices; +}; + /** * blkmap_map_linear() - Map region of other block device * @@ -74,4 +91,16 @@ int blkmap_create(const char *label, struct udevice **devp); */ int blkmap_destroy(struct udevice *dev);
+/** + * blkmap_create_ramdisk() - Create new ramdisk with blkmap + * + * @label: Label of the new blkmap + * @image_addr: Target memory start address of this mapping + * @image_size: Target memory size of this mapping + * @devp: Updated with the address of the created blkmap device + * Returns: 0 on success, negative error code on failure + */ +int blkmap_create_ramdisk(const char *label, ulong image_addr, int image_size, + struct udevice **devp); + #endif /* _BLKMAP_H */