diff options
Diffstat (limited to 'include')
| -rw-r--r-- | include/dm/uclass-id.h | 1 | ||||
| -rw-r--r-- | include/sm-uclass.h | 72 | ||||
| -rw-r--r-- | include/sm.h | 67 |
3 files changed, 140 insertions, 0 deletions
diff --git a/include/dm/uclass-id.h b/include/dm/uclass-id.h index 0432c95c9ed..d2c5288c8bb 100644 --- a/include/dm/uclass-id.h +++ b/include/dm/uclass-id.h @@ -89,6 +89,7 @@ enum uclass_id { UCLASS_MDIO, /* MDIO bus */ UCLASS_MDIO_MUX, /* MDIO MUX/switch */ UCLASS_MEMORY, /* Memory Controller device */ + UCLASS_SM, /* Secure Monitor driver */ UCLASS_MISC, /* Miscellaneous device */ UCLASS_MMC, /* SD / MMC card or chip */ UCLASS_MOD_EXP, /* RSA Mod Exp device */ diff --git a/include/sm-uclass.h b/include/sm-uclass.h new file mode 100644 index 00000000000..c1144840440 --- /dev/null +++ b/include/sm-uclass.h @@ -0,0 +1,72 @@ +/* SPDX-License-Identifier: GPL-2.0+ */ +/* + * Copyright (c) 2023 SberDevices, Inc. + * + * Author: Alexey Romanov <avromanov@salutedevices.com> + */ + +#ifndef __SM_UCLASS_H__ +#define __SM_UCLASS_H__ + +#include <asm/types.h> +#include <asm/ptrace.h> + +struct udevice; + +/** + * struct sm_ops - The functions that a SM driver must implement. + * + * @sm_call: Request a secure monitor call with specified command. + * + * @sm_call_read: Request a secure monitor call and retrieve data + * from secure-monitor (depends on specified command). + * + * @sm_call_write: Request a secure monitor call and send data + * to secure-monitor (depends on specified command). + * + * The individual methods are described more fully below. + */ +struct sm_ops { + /** + * sm_call - generic SMC call to the secure-monitor + * + * @dev: Pointer to UCLASS_SM device + * @cmd_index: Index of the SMC function ID + * @smc_ret: Returned value from secure world + * @args: SMC arguments + * + * @return: 0 on success, a negative value on error + */ + int (*sm_call)(struct udevice *dev, u32 cmd, s32 *smc_ret, + struct pt_regs *args); + + /** + * sm_call_write - send data to secure-monitor + * + * @dev: Pointer to UCLASS_SM device + * @buffer: Buffer containing data to send + * @size: Size of the buffer + * @cmd: Index of the SMC function ID + * @args: SMC arguments + * + * @return: size of sent data on success, a negative value on error + */ + int (*sm_call_write)(struct udevice *dev, void *buffer, + size_t size, u32 cmd, struct pt_regs *args); + + /** + * sm_call_read - retrieve data from secure-monitor + * + * @dev: Pointer to UCLASS_SM device + * @buffer: Buffer to store the retrieved data + * @size: Size of the buffer + * @cmd: Index of the SMC function ID + * @args: SMC arguments + * + * @return: size of read data on success, a negative value on error + */ + int (*sm_call_read)(struct udevice *dev, void *buffer, + size_t size, u32 cmd, struct pt_regs *args); +}; + +#endif /* __SM_UCLASS_H__ */ diff --git a/include/sm.h b/include/sm.h new file mode 100644 index 00000000000..afa9c89055e --- /dev/null +++ b/include/sm.h @@ -0,0 +1,67 @@ +/* SPDX-License-Identifier: GPL-2.0+ */ +/* + * Copyright (c) 2023 SberDevices, Inc. + * + * Author: Alexey Romanov <avromanov@salutedevices.ru> + */ + +#ifndef __SM_H__ +#define __SM_H__ + +/* + * NOTE: UCLASS_SM is designed with the idea that + * each driver should convert @cmd to some raw + * value, which is known only for driver, and set this + * value to the first element of the @args->regs array. + * Therefore, it is necessary to pass the remaining + * arguments starting at index = 1. Anyway, driver + * implementation may vary, so, please, check the specific + * implementation of the driver you are using. + */ + +#include <asm/types.h> +#include <asm/ptrace.h> + +struct udevice; + +/** + * sm_call - generic SMC call to the secure-monitor + * + * @dev: Pointer to UCLASS_SM device + * @cmd_index: Index of the SMC function ID + * @smc_ret: Returned value from secure world + * @args: SMC arguments + * + * @return: 0 on success, a negative value on error + */ +int sm_call(struct udevice *dev, u32 cmd, s32 *ret, struct pt_regs *args); + +/** + * sm_call_read - retrieve data from secure-monitor + * + * @dev: Pointer to UCLASS_MESON_SM device + * @buffer: Buffer to store the retrieved data + * @size: Size of the buffer + * @cmd: Index of the SMC function ID + * @args: SMC arguments + * + * @return: size of read data on success, a negative value on error + */ +int sm_call_read(struct udevice *dev, void *buffer, size_t size, + u32 cmd, struct pt_regs *args); + +/** + * sm_call_write - send data to secure-monitor + * + * @dev: Pointer to UCLASS_SM device + * @buffer: Buffer containing data to send + * @size: Size of the buffer + * @cmd: Index of the SMC function ID + * @args: SMC arguments + * + * @return: size of sent data on success, a negative value on error + */ +int sm_call_write(struct udevice *dev, void *buffer, size_t size, + u32 cmd, struct pt_regs *args); + +#endif /* __SM_H__ */ |