diff options
| -rw-r--r-- | include/fwu.h | 29 | ||||
| -rw-r--r-- | lib/fwu_updates/fwu.c | 27 | ||||
| -rw-r--r-- | lib/fwu_updates/fwu_gpt.c | 123 |
3 files changed, 179 insertions, 0 deletions
diff --git a/include/fwu.h b/include/fwu.h index ce99c02..5391af9 100644 --- a/include/fwu.h +++ b/include/fwu.h @@ -312,4 +312,33 @@ int fwu_accept_image(efi_guid_t *img_type_id, u32 bank); */ int fwu_clear_accept_image(efi_guid_t *img_type_id, u32 bank); +/** + * fwu_plat_get_alt_num() - Get the DFU Alt Num for the image from the platform + * @dev: FWU device + * @image_guid: Image GUID for which DFU alt number needs to be retrieved + * @alt_num: Pointer to the alt_num + * + * Get the DFU alt number from the platform for the image specified by the + * image GUID. + * + * Return: 0 if OK, -ve on error + * + */ +int fwu_plat_get_alt_num(struct udevice *dev, efi_guid_t *image_guid, + u8 *alt_num); + +/** + * fwu_plat_get_update_index() - Get the value of the update bank + * @update_idx: Bank number to which images are to be updated + * + * Get the value of the bank(partition) to which the update needs to be + * made. + * + * Note: This is a weak function and platforms can override this with + * their own implementation for selection of the update bank. + * + * Return: 0 if OK, -ve on error + * + */ +int fwu_plat_get_update_index(uint *update_idx); #endif /* _FWU_H_ */ diff --git a/lib/fwu_updates/fwu.c b/lib/fwu_updates/fwu.c index e92533e..e73d5f1 100644 --- a/lib/fwu_updates/fwu.c +++ b/lib/fwu_updates/fwu.c @@ -472,3 +472,30 @@ int fwu_clear_accept_image(efi_guid_t *img_type_id, u32 bank) return fwu_clrset_image_accept(img_type_id, bank, IMAGE_ACCEPT_CLEAR); } + +/** + * fwu_plat_get_update_index() - Get the value of the update bank + * @update_idx: Bank number to which images are to be updated + * + * Get the value of the bank(partition) to which the update needs to be + * made. + * + * Note: This is a weak function and platforms can override this with + * their own implementation for selection of the update bank. + * + * Return: 0 if OK, -ve on error + * + */ +__weak int fwu_plat_get_update_index(uint *update_idx) +{ + int ret; + u32 active_idx; + + ret = fwu_get_active_index(&active_idx); + if (ret < 0) + return -1; + + *update_idx = (active_idx + 1) % CONFIG_FWU_NUM_BANKS; + + return ret; +} diff --git a/lib/fwu_updates/fwu_gpt.c b/lib/fwu_updates/fwu_gpt.c new file mode 100644 index 0000000..21a573c --- /dev/null +++ b/lib/fwu_updates/fwu_gpt.c @@ -0,0 +1,123 @@ +// SPDX-License-Identifier: GPL-2.0-or-later +/* + * Copyright (c) 2022, Linaro Limited + */ + +#include <blk.h> +#include <dfu.h> +#include <efi.h> +#include <efi_loader.h> +#include <fwu.h> +#include <log.h> +#include <part.h> + +#include <linux/errno.h> + +static int get_gpt_dfu_identifier(struct blk_desc *desc, efi_guid_t *image_guid) +{ + int i; + struct disk_partition info; + efi_guid_t unique_part_guid; + + for (i = 1; i < MAX_SEARCH_PARTITIONS; i++) { + if (part_get_info(desc, i, &info)) + continue; + uuid_str_to_bin(info.uuid, unique_part_guid.b, + UUID_STR_FORMAT_GUID); + + if (!guidcmp(&unique_part_guid, image_guid)) + return i; + } + + log_err("No partition found with image_guid %pUs\n", image_guid); + return -ENOENT; +} + +static int fwu_alt_num_for_dfu_dev(struct dfu_entity *dfu, int dev_num, + int part, unsigned char dfu_dev, + u8 *alt_num) +{ + int ret; + + switch(dfu_dev) { + case DFU_DEV_MMC: + if (dfu->layout == DFU_RAW_ADDR && + dfu->data.mmc.dev_num == dev_num && + dfu->data.mmc.part == part) { + *alt_num = dfu->alt; + ret = 0; + } else { + ret = -ENOENT; + } + break; + default: + ret = -ENOENT; + } + + return ret; +} + +static int fwu_gpt_get_alt_num(struct blk_desc *desc, efi_guid_t *image_guid, + u8 *alt_num, unsigned char dfu_dev) +{ + int ret = -1; + int i, part, dev_num; + struct dfu_entity *dfu; + + dev_num = desc->devnum; + part = get_gpt_dfu_identifier(desc, image_guid); + if (part < 0) + return -ENOENT; + + ret = dfu_init_env_entities(NULL, NULL); + if (ret) + goto out; + + i = 0; + while (true) { + dfu = dfu_get_entity(i++); + if (!dfu) { + ret = -ENOENT; + break; + } + + if (dfu->dev_type != dfu_dev) + continue; + + ret = fwu_alt_num_for_dfu_dev(dfu, dev_num, part, dfu_dev, + alt_num); + if (!ret) + break; + } + +out: + dfu_free_entities(); + + return ret; +} + +/** + * fwu_plat_get_alt_num() - Get the DFU alt number + * @dev: FWU metadata device + * @image_guid: GUID value of the image for which the alt num is to + * be obtained + * @alt_num: The DFU alt number for the image that is to be updated + * + * Get the DFU alt number for the image that is to be updated. The + * image is identified with the image_guid parameter that is passed + * to the function. + * + * Note: This is a weak function and platforms can override this with + * their own implementation for obtaining the alt number value. + * + * Return: 0 if OK, -ve on error + * + */ +__weak int fwu_plat_get_alt_num(struct udevice *dev, efi_guid_t *image_guid, + u8 *alt_num) +{ + struct fwu_mdata_gpt_blk_priv *priv = dev_get_priv(dev); + + return fwu_gpt_get_alt_num(dev_get_uclass_plat(priv->blk_dev), + image_guid, alt_num, DFU_DEV_MMC); +} |