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rpmb: move rpmb_frame struct and constants to common header 

Move struct rpmb_frame and RPMB operation constants from MMC block
driver to include/linux/rpmb.h for reuse across different RPMB
implementations (UFS, NVMe, etc.).

Signed-off-by: Bean Huo <beanhuo@micron.com>
Reviewed-by: Avri Altman <avri.altman@sandisk.com>
Acked-by: Jens Wiklander <jens.wiklander@linaro.org>
Reviewed-by: Bart Van Assche <bvanassche@acm.org>
Signed-off-by: Ulf Hansson <ulf.hansson@linaro.org>
This commit is contained in:
Bean Huo 2025-10-01 08:08:03 +02:00 committed by Ulf Hansson
parent 3a86608788
commit 7e8242405b
2 changed files with 44 additions and 42 deletions
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42
drivers/mmc/core/block.c
View File

@ -79,48 +79,6 @@ MODULE_ALIAS("mmc:block");
#define MMC_EXTRACT_INDEX_FROM_ARG(x) ((x & 0x00FF0000) >> 16)
#define MMC_EXTRACT_VALUE_FROM_ARG(x) ((x & 0x0000FF00) >> 8)
/**
* struct rpmb_frame - rpmb frame as defined by eMMC 5.1 (JESD84-B51)
*
* @stuff : stuff bytes
* @key_mac : The authentication key or the message authentication
* code (MAC) depending on the request/response type.
* The MAC will be delivered in the last (or the only)
* block of data.
* @data : Data to be written or read by signed access.
* @nonce : Random number generated by the host for the requests
* and copied to the response by the RPMB engine.
* @write_counter: Counter value for the total amount of the successful
* authenticated data write requests made by the host.
* @addr : Address of the data to be programmed to or read
* from the RPMB. Address is the serial number of
* the accessed block (half sector 256B).
* @block_count : Number of blocks (half sectors, 256B) requested to be
* read/programmed.
* @result : Includes information about the status of the write counter
* (valid, expired) and result of the access made to the RPMB.
* @req_resp : Defines the type of request and response to/from the memory.
*
* The stuff bytes and big-endian properties are modeled to fit to the spec.
*/
struct rpmb_frame {
u8 stuff[196];
u8 key_mac[32];
u8 data[256];
u8 nonce[16];
__be32 write_counter;
__be16 addr;
__be16 block_count;
__be16 result;
__be16 req_resp;
} __packed;
#define RPMB_PROGRAM_KEY 0x1 /* Program RPMB Authentication Key */
#define RPMB_GET_WRITE_COUNTER 0x2 /* Read RPMB write counter */
#define RPMB_WRITE_DATA 0x3 /* Write data to RPMB partition */
#define RPMB_READ_DATA 0x4 /* Read data from RPMB partition */
#define RPMB_RESULT_READ 0x5 /* Read result request (Internal) */
#define RPMB_FRAME_SIZE sizeof(struct rpmb_frame)
#define CHECK_SIZE_NEQ(val) ((val) != sizeof(struct rpmb_frame))
#define CHECK_SIZE_ALIGNED(val) IS_ALIGNED((val), sizeof(struct rpmb_frame))

44
include/linux/rpmb.h
View File

@ -61,6 +61,50 @@ struct rpmb_dev {
#define to_rpmb_dev(x) container_of((x), struct rpmb_dev, dev)
/**
* struct rpmb_frame - RPMB frame structure for authenticated access
*
* @stuff : stuff bytes, a padding/reserved area of 196 bytes at the
* beginning of the RPMB frame. They don’t carry meaningful
* data but are required to make the frame exactly 512 bytes.
* @key_mac : The authentication key or the message authentication
* code (MAC) depending on the request/response type.
* The MAC will be delivered in the last (or the only)
* block of data.
* @data : Data to be written or read by signed access.
* @nonce : Random number generated by the host for the requests
* and copied to the response by the RPMB engine.
* @write_counter: Counter value for the total amount of the successful
* authenticated data write requests made by the host.
* @addr : Address of the data to be programmed to or read
* from the RPMB. Address is the serial number of
* the accessed block (half sector 256B).
* @block_count : Number of blocks (half sectors, 256B) requested to be
* read/programmed.
* @result : Includes information about the status of the write counter
* (valid, expired) and result of the access made to the RPMB.
* @req_resp : Defines the type of request and response to/from the memory.
*
* The stuff bytes and big-endian properties are modeled to fit to the spec.
*/
struct rpmb_frame {
u8 stuff[196];
u8 key_mac[32];
u8 data[256];
u8 nonce[16];
__be32 write_counter;
__be16 addr;
__be16 block_count;
__be16 result;
__be16 req_resp;
};
#define RPMB_PROGRAM_KEY 0x1 /* Program RPMB Authentication Key */
#define RPMB_GET_WRITE_COUNTER 0x2 /* Read RPMB write counter */
#define RPMB_WRITE_DATA 0x3 /* Write data to RPMB partition */
#define RPMB_READ_DATA 0x4 /* Read data from RPMB partition */
#define RPMB_RESULT_READ 0x5 /* Read result request (Internal) */
#if IS_ENABLED(CONFIG_RPMB)
struct rpmb_dev *rpmb_dev_get(struct rpmb_dev *rdev);
void rpmb_dev_put(struct rpmb_dev *rdev);