hi Masami, On Tue, 21 Dec 2021 at 05:40, Masami Hiramatsu <masami.hirama...@linaro.org> wrote:
> Hi Sughosh, > > 2021年12月19日(日) 16:06 Sughosh Ganu <sughosh.g...@linaro.org>: > > > > In the FWU Multi Bank Update feature, the information about the > > updatable images is stored as part of the metadata, which is stored on > > a dedicated partition. Add the metadata structure, and functions to > > access the metadata. These are generic API's, and implementations can > > be added based on parameters like how the metadata partition is > > accessed and what type of storage device houses the metadata. > > > > Signed-off-by: Sughosh Ganu <sughosh.g...@linaro.org> > > --- > > Changes since V1: > > * Move all function declarations to a separate header fwu.h > > * Rename metadata with mdata for all symbols > > * Drop the parameter in the function fwu_revert_boot_index > > as suggested by Etienne > > > > include/fwu.h | 28 +++++ > > include/fwu_mdata.h | 102 ++++++++++++++++ > > lib/fwu_updates/fwu_mdata.c | 236 ++++++++++++++++++++++++++++++++++++ > > 3 files changed, 366 insertions(+) > > create mode 100644 include/fwu.h > > create mode 100644 include/fwu_mdata.h > > create mode 100644 lib/fwu_updates/fwu_mdata.c > > > > diff --git a/include/fwu.h b/include/fwu.h > > new file mode 100644 > > index 0000000000..e6bc3e6b73 > > --- /dev/null > > +++ b/include/fwu.h > > @@ -0,0 +1,28 @@ > > +/* SPDX-License-Identifier: GPL-2.0+ */ > > +/* > > + * Copyright (c) 2021, Linaro Limited > > + */ > > + > > +#if !defined _FWU_H_ > > +#define _FWU_H_ > > + > > +#include <efi.h> > > + > > +#include <linux/types.h> > > + > > +#define FWU_MDATA_VERSION 0x1 > > + > > +#define FWU_MDATA_GUID \ > > + EFI_GUID(0x8a7a84a0, 0x8387, 0x40f6, 0xab, 0x41, \ > > + 0xa8, 0xb9, 0xa5, 0xa6, 0x0d, 0x23) > > + > > +int fwu_get_active_index(u32 *active_idx); > > +int fwu_update_active_index(u32 active_idx); > > +int fwu_get_image_alt_num(efi_guid_t image_type_id, u32 update_bank, > > + int *alt_num); > > +int fwu_mdata_check(void); > > +int fwu_revert_boot_index(void); > > +int fwu_accept_image(efi_guid_t *img_type_id); > > +int fwu_clear_accept_image(efi_guid_t *img_type_id, u32 bank); > > + > > +#endif /* _FWU_H_ */ > > diff --git a/include/fwu_mdata.h b/include/fwu_mdata.h > > new file mode 100644 > > index 0000000000..11eb570012 > > --- /dev/null > > +++ b/include/fwu_mdata.h > > @@ -0,0 +1,102 @@ > > +/* SPDX-License-Identifier: GPL-2.0+ */ > > +/* > > + * Copyright (c) 2021, Linaro Limited > > + */ > > + > > +#if !defined _FWU_MDATA_H_ > > +#define _FWU_MDATA_H_ > > + > > +#include <efi.h> > > +#include <uuid.h> > > + > > +#include <linux/types.h> > > + > > +/** > > + * struct fwu_image_bank_info - firmware image information > > + * @image_uuid: Guid value of the image in this bank > > + * @accepted: Acceptance status of the image > > + * @reserved: Reserved > > + * > > + * The structure contains image specific fields which are > > + * used to identify the image and to specify the image's > > + * acceptance status > > + */ > > +struct fwu_image_bank_info { > > + efi_guid_t image_uuid; > > + u32 accepted; > > + u32 reserved; > > +}; > > Could you explicitly pack these metadata data structures? > Since these metadata will be shared among bootloaders (TF-A, SCP-firmware), > it is better to ensure that those are packed and fixed offset for each > field. > Okay. WIll do it. > > > + > > +/** > > + * struct fwu_image_entry - information for a particular type of image > > + * @image_type_uuid: Guid value for identifying the image type > > + * @location_uuid: Guid of the storage volume where the image is located > > + * @img_bank_info: Array containing properties of images > > + * > > + * This structure contains information on various types of updatable > > + * firmware images. Each image type then contains an array of image > > + * information per bank. > > + */ > > +struct fwu_image_entry { > > + efi_guid_t image_type_uuid; > > + efi_guid_t location_uuid; > > + struct fwu_image_bank_info img_bank_info[CONFIG_FWU_NUM_BANKS]; > > +}; > > + > > +/** > > + * struct fwu_mdata - FWU metadata structure for multi-bank updates > > + * @crc32: crc32 value for the FWU metadata > > + * @version: FWU metadata version > > + * @active_index: Index of the bank currently used for booting images > > + * @previous_active_inde: Index of the bank used before the current bank > > + * being used for booting > > + * @img_entry: Array of information on various firmware images that can > > + * be updated > > + * > > + * This structure is used to store all the needed information for > performing > > + * multi bank updates on the platform. This contains info on the bank > being > > + * used to boot along with the information needed for identification of > > + * individual images > > + */ > > +struct fwu_mdata { > > + u32 crc32; > > + u32 version; > > + u32 active_index; > > + u32 previous_active_index; > > + > > + struct fwu_image_entry img_entry[CONFIG_FWU_NUM_IMAGES_PER_BANK]; > > +}; > > + > > +/** > > + * @get_active_index: get the current active_index value > > + * @update_active_index: update the active_index value > > + * @get_image_alt_num: get the alt number to be used for the image > > + * @mdata_check: check the validity of the FWU metadata partitions > > + * @revert_boot_index: set the active_index to previous_active_index > > + * @set_accept_image: set the accepted bit for the image > > + * @clear_accept_image: clear the accepted bit for the image > > + * @get_mdata() - Get a FWU metadata copy > > + */ > > +struct fwu_mdata_ops { > > + int (*get_active_index)(u32 *active_idx); > > + > > + int (*update_active_index)(u32 active_idx); > > + > > + int (*get_image_alt_num)(efi_guid_t image_type_id, u32 > update_bank, > > + int *alt_num); > > + > > + int (*mdata_check)(void); > > + > > + int (*revert_boot_index)(void); > > + > > + int (*set_accept_image)(efi_guid_t *img_type_id); > > + > > + int (*clear_accept_image)(efi_guid_t *img_type_id, u32 bank); > > + > > + int (*get_mdata)(struct fwu_mdata **mdata); > > +}; > > + > > +int fwu_get_mdata(struct fwu_mdata **mdata); > > +struct fwu_mdata_ops *get_plat_fwu_mdata_ops(void); > > Also, could you also move these function prototypes and operators to > fwu? I would like to copy this header file to the boot loaders as is. > In that case, I just need the definition of the metadata data structure, > but no function prototypes. > I have moved the function declarations to fwu.h. The one function prototype that I have in fwu_mdata.h is the one which has the metadata structure as one of it's parameters. Same for the ops as well. The get_mdata function has the metadata structure as its parameter. Are you facing any issues with the current structure of the files. -sughosh > Thank you, > > > + > > +#endif /* _FWU_MDATA_H_ */ > > diff --git a/lib/fwu_updates/fwu_mdata.c b/lib/fwu_updates/fwu_mdata.c > > new file mode 100644 > > index 0000000000..348e9c85f7 > > --- /dev/null > > +++ b/lib/fwu_updates/fwu_mdata.c > > @@ -0,0 +1,236 @@ > > +// SPDX-License-Identifier: GPL-2.0+ > > +/* > > + * Copyright (c) 2021, Linaro Limited > > + */ > > + > > +#include <fwu_mdata.h> > > + > > +#include <linux/errno.h> > > +#include <linux/types.h> > > + > > +static struct fwu_mdata_ops *get_fwu_mdata_ops(void) > > +{ > > + struct fwu_mdata_ops *ops; > > + > > + ops = get_plat_fwu_mdata_ops(); > > + if (!ops) { > > + log_err("Unable to get fwu ops\n"); > > + return NULL; > > + } > > + > > + return ops; > > +} > > + > > +/** > > + * fwu_get_active_index() - Get active_index from the FWU metadata > > + * @active_idx: active_index value to be read > > + * > > + * Read the active_index field from the FWU metadata and place it in > > + * the variable pointed to be the function argument. > > + * > > + * Return: 0 if OK, -ve on error > > + * > > + */ > > +int fwu_get_active_index(u32 *active_idx) > > +{ > > + struct fwu_mdata_ops *ops; > > + > > + ops = get_fwu_mdata_ops(); > > + if (!ops) > > + return -EPROTONOSUPPORT; > > + > > + if (!ops->get_active_index) { > > + log_err("get_active_index() method not defined for the > platform\n"); > > + return -ENOSYS; > > + } > > + > > + return ops->get_active_index(active_idx); > > +} > > + > > +/** > > + * fwu_update_active_index() - Update active_index from the FWU metadata > > + * @active_idx: active_index value to be updated > > + * > > + * Update the active_index field in the FWU metadata > > + * > > + * Return: 0 if OK, -ve on error > > + * > > + */ > > +int fwu_update_active_index(u32 active_idx) > > +{ > > + struct fwu_mdata_ops *ops; > > + > > + ops = get_fwu_mdata_ops(); > > + if (!ops) > > + return -EPROTONOSUPPORT; > > + > > + if (!ops->update_active_index) { > > + log_err("update_active_index() method not defined for > the platform\n"); > > + return -ENOSYS; > > + } > > + > > + return ops->update_active_index(active_idx); > > +} > > + > > +/** > > + * fwu_get_image_alt_num() - Get the dfu alt number to be used for > capsule update > > + * @image_type_id: image guid as passed in the capsule > > + * @update_bank: Bank to which the update is to be made > > + * @alt_num: The alt_num for the image > > + * > > + * Based on the guid value passed in the capsule, along with the bank > to which the > > + * image needs to be updated, get the dfu alt number which will be used > for the > > + * capsule update > > + * > > + * Return: 0 if OK, -ve on error > > + * > > + */ > > +int fwu_get_image_alt_num(efi_guid_t image_type_id, u32 update_bank, > > + int *alt_num) > > +{ > > + struct fwu_mdata_ops *ops; > > + > > + ops = get_fwu_mdata_ops(); > > + if (!ops) > > + return -EPROTONOSUPPORT; > > + > > + if (!ops->get_image_alt_num) { > > + log_err("get_image_alt_num() method not defined for the > platform\n"); > > + return -ENOSYS; > > + } > > + > > + return ops->get_image_alt_num(image_type_id, update_bank, > alt_num); > > +} > > + > > +/** > > + * fwu_mdata_check() - Check if the FWU metadata is valid > > + * > > + * Validate both copies of the FWU metadata. If one of the copies > > + * has gone bad, restore it from the other bad copy. > > + * > > + * Return: 0 if OK, -ve on error > > + * > > + */ > > +int fwu_mdata_check(void) > > +{ > > + struct fwu_mdata_ops *ops; > > + > > + ops = get_fwu_mdata_ops(); > > + if (!ops) > > + return -EPROTONOSUPPORT; > > + > > + if (!ops->mdata_check) { > > + log_err("mdata_check() method not defined for the > platform\n"); > > + return -ENOSYS; > > + } > > + > > + return ops->mdata_check(); > > +} > > + > > +/** > > + * fwu_revert_boot_index() - Revert the active index in the FWU metadata > > + * > > + * Revert the active_index value in the FWU metadata, by swapping the > values > > + * of active_index and previous_active_index in both copies of the > > + * FWU metadata. > > + * > > + * Return: 0 if OK, -ve on error > > + * > > + */ > > +int fwu_revert_boot_index(void) > > +{ > > + struct fwu_mdata_ops *ops; > > + > > + ops = get_fwu_mdata_ops(); > > + if (!ops) > > + return -EPROTONOSUPPORT; > > + > > + if (!ops->revert_boot_index) { > > + log_err("revert_boot_index() method not defined for the > platform\n"); > > + return -ENOSYS; > > + } > > + > > + return ops->revert_boot_index(); > > +} > > + > > +/** > > + * fwu_accept_image() - Set the Acceptance bit for the image > > + * @img_type_id: Guid of the image type for which the accepted bit is > to be > > + * cleared > > + * > > + * Set the accepted bit for the image specified by the img_guid > parameter. This > > + * indicates acceptance of image for subsequent boots by some governing > component > > + * like OS(or firmware). > > + * > > + * Return: 0 if OK, -ve on error > > + * > > + */ > > +int fwu_accept_image(efi_guid_t *img_type_id) > > +{ > > + struct fwu_mdata_ops *ops; > > + > > + ops = get_fwu_mdata_ops(); > > + if (!ops) > > + return -EPROTONOSUPPORT; > > + > > + if (!ops->set_accept_image) { > > + log_err("set_accept_image() method not defined for the > platform\n"); > > + return -ENOSYS; > > + } > > + > > + return ops->set_accept_image(img_type_id); > > +} > > + > > +/** > > + * fwu_clear_accept_image() - Clear the Acceptance bit for the image > > + * @img_type_id: Guid of the image type for which the accepted bit is > to be > > + * cleared > > + * > > + * Clear the accepted bit for the image type specified by the > img_type_id parameter. > > + * This function is called after the image has been updated. The > accepted bit is > > + * cleared to be set subsequently after passing the image acceptance > criteria, by > > + * either the OS(or firmware) > > + * > > + * Return: 0 if OK, -ve on error > > + * > > + */ > > +int fwu_clear_accept_image(efi_guid_t *img_type_id, u32 bank) > > +{ > > + struct fwu_mdata_ops *ops; > > + > > + ops = get_fwu_mdata_ops(); > > + if (!ops) > > + return -EPROTONOSUPPORT; > > + > > + if (!ops->clear_accept_image) { > > + log_err("clear_accept_image() method not defined for the > platform\n"); > > + return -ENOSYS; > > + } > > + > > + return ops->clear_accept_image(img_type_id, bank); > > +} > > + > > +/** > > + * fwu_get_mdata() - Get a FWU metadata copy > > + * @mdata: Copy of the FWU metadata > > + * > > + * Get a valid copy of the FWU metadata. > > + * > > + * Return: 0 if OK, -ve on error > > + * > > + */ > > +int fwu_get_mdata(struct fwu_mdata **mdata) > > +{ > > + struct fwu_mdata_ops *ops; > > + > > + ops = get_fwu_mdata_ops(); > > + if (!ops) > > + return -EPROTONOSUPPORT; > > + > > + if (!ops->get_mdata) { > > + log_err("get_mdata() method not defined for the > platform\n"); > > + return -ENOSYS; > > + } > > + > > + return ops->get_mdata(mdata); > > +} > > -- > > 2.17.1 > > > > > -- > Masami Hiramatsu >