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blk: blkmap: add ramdisk creation utility function

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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>
Reviewed-by: Simon Glass <sjg@chromium.org>
Reviewed-by: Ilias Apalodimas <ilias.apalodimas@linaro.org>
Signed-off-by: Ilias Apalodimas <ilias.apalodimas@linaro.org>
This commit is contained in:
Masahisa Kojima 2023-11-10 13:25:36 +09:00 committed by Ilias Apalodimas
parent 8cf18da1a9
commit d822255d65
4 changed files with 84 additions and 16 deletions
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3
drivers/block/Makefile
View File

@ -15,7 +15,8 @@ obj-$(CONFIG_RKMTD) += rkmtd.o
endif
obj-$(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_$(SPL_TPL_)BLKMAP) += blkmap.o
obj-$(CONFIG_$(SPL_TPL_)BLKMAP) += blkmap_helper.o
obj-$(CONFIG_EFI_MEDIA) += efi-media-uclass.o
obj-$(CONFIG_EFI_MEDIA_SANDBOX) += sb_efi_media.o

15
drivers/block/blkmap.c
View File

@ -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));

53
drivers/block/blkmap_helper.c Normal file
View File

@ -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, ulong 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;
}

29
include/blkmap.h
View File

@ -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, ulong image_size,
struct udevice **devp);
#endif /* _BLKMAP_H */