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radeonsi: add header file for cenc parameters

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New header file that defines parameters and structres for cenc decryption.

Signed-off-by: Boyuan Zhang <boyuan.zhang@amd.com>
Reviewed-by: Ruijing Dong <ruijing.dong@amd.com>
Part-of: <https://gitlab.freedesktop.org/mesa/mesa/-/merge_requests/34854>
This commit is contained in:
Boyuan Zhang 2025-03-13 20:42:54 -04:00 • committed by Marge Bot
parent 4e9b59075a
commit 5565043534
2 changed files with 87 additions and 0 deletions
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86
src/gallium/drivers/radeonsi/cencdecryptionparam.h Normal file
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@ -0,0 +1,86 @@
/**************************************************************************
*
* Copyright 2025 Advanced Micro Devices, Inc.
*
* SPDX-License-Identifier: MIT
*
**************************************************************************/
#ifndef SECURE_BUFFER_FORMAT_H
#define SECURE_BUFFER_FORMAT_H
#include <stdint.h>
#define AES_BLOCK_SIZE 16
#define KEY_SIZE_128 16
#define CMAC_SIZE AES_BLOCK_SIZE
#define MAX_SUBSAMPLES 288 /* Maximum subsamples in a sample */
typedef struct PACKED _secure_buffer_header
{
uint8_t cookie[8]; /* 8-byte cookie with value 'wvcencsb' */
uint8_t version; /* Set to 1 */
uint8_t reserved[55]; /* Reserved for future use */
} secure_buffer_header;
typedef struct PACKED _subsample_description
{
uint32_t num_bytes_clear;
uint32_t num_bytes_encrypted;
uint8_t subsample_flags; /* Is this the first/last subsample in a sample? */
uint8_t block_offset; /* Used only for CTR "cenc" mode */
} subsample_description;
typedef struct PACKED _cenc_encrypt_pattern_desc
{
uint32_t encrypt; /* Number of 16 byte blocks to decrypt */
uint32_t skip; /* Number of 16 byte blocks to leave in clear */
} cenc_encrypt_pattern_desc;
typedef struct PACKED _sample_description
{
subsample_description subsamples[MAX_SUBSAMPLES];
uint8_t iv[AES_BLOCK_SIZE]; /* The IV for the initial subsample */
cenc_encrypt_pattern_desc pattern;
uint32_t subsamples_length; /* The number of subsamples in the sample */
} sample_description;
typedef struct PACKED _native_enforce_policy_info
{
uint8_t enabled_policy_index[4];
uint32_t policy_array[32];
} native_enforce_policy_info;
typedef struct PACKED _signed_native_enforce_policy
{
uint8_t wrapped_key[KEY_SIZE_128];
native_enforce_policy_info native_policy;
uint8_t signature[CMAC_SIZE];
} signed_native_enforce_policy;
typedef struct PACKED hw_drm_key_blob_info
{
uint8_t wrapped_key[KEY_SIZE_128]; /* Content key encrypted with session key */
uint8_t wrapped_key_iv[AES_BLOCK_SIZE]; /* IV used to encrypt content key */
union
{
struct
{
uint32_t drm_session_id : 4; /* DRM Session ID */
uint32_t use_hw_drm_aes_ctr : 1; /* Invoke HW-DRM with AES-CTR for content decryption */
uint32_t use_hw_drm_aes_cbc : 1; /* Invoke HW-DRM with AES-CBC for content decryption */
uint32_t reserved_bits : 26; /* Reserved fields */
} s;
uint32_t value;
} u;
signed_native_enforce_policy local_policy;
uint8_t reserved[128];
} hw_drm_key_blob_info;
typedef struct PACKED amd_secure_buffer_format
{
secure_buffer_header sb_header;
sample_description desc;
hw_drm_key_blob_info key_blob;
} amd_secure_buffer_format;
#endif /* SECURE_BUFFER_FORMAT_H */

1
src/gallium/drivers/radeonsi/meson.build
View file

@ -77,6 +77,7 @@ files_libradeonsi = files(
'si_vpe.c',
'si_vpe.h',
'pspdecryptionparam.h',
'cencdecryptionparam.h',
'radeon_uvd.c',
'radeon_uvd.h',
'radeon_uvd_enc.c',