diff options
Diffstat (limited to 'drivers/crypto/ccp/tee-dev.h')
| -rw-r--r-- | drivers/crypto/ccp/tee-dev.h | 35 |
1 files changed, 20 insertions, 15 deletions
diff --git a/drivers/crypto/ccp/tee-dev.h b/drivers/crypto/ccp/tee-dev.h index f09960112115..ea9a2b7c05f5 100644 --- a/drivers/crypto/ccp/tee-dev.h +++ b/drivers/crypto/ccp/tee-dev.h @@ -1,6 +1,6 @@ /* SPDX-License-Identifier: MIT */ /* - * Copyright 2019 Advanced Micro Devices, Inc. + * Copyright (C) 2019,2021 Advanced Micro Devices, Inc. * * Author: Rijo Thomas <Rijo-john.Thomas@amd.com> * Author: Devaraj Rangasamy <Devaraj.Rangasamy@amd.com> @@ -17,20 +17,9 @@ #include <linux/device.h> #include <linux/mutex.h> -#define TEE_DEFAULT_TIMEOUT 10 -#define MAX_BUFFER_SIZE 992 - -/** - * enum tee_ring_cmd_id - TEE interface commands for ring buffer configuration - * @TEE_RING_INIT_CMD: Initialize ring buffer - * @TEE_RING_DESTROY_CMD: Destroy ring buffer - * @TEE_RING_MAX_CMD: Maximum command id - */ -enum tee_ring_cmd_id { - TEE_RING_INIT_CMD = 0x00010000, - TEE_RING_DESTROY_CMD = 0x00020000, - TEE_RING_MAX_CMD = 0x000F0000, -}; +#define TEE_DEFAULT_CMD_TIMEOUT (10 * MSEC_PER_SEC) +#define TEE_DEFAULT_RING_TIMEOUT 10 +#define MAX_BUFFER_SIZE 988 /** * struct tee_init_ring_cmd - Command to init TEE ring buffer @@ -82,6 +71,20 @@ enum tee_cmd_state { }; /** + * enum cmd_resp_state - TEE command's response status maintained by driver + * @CMD_RESPONSE_INVALID: initial state when no command is written to ring + * @CMD_WAITING_FOR_RESPONSE: driver waiting for response from TEE + * @CMD_RESPONSE_TIMEDOUT: failed to get response from TEE + * @CMD_RESPONSE_COPIED: driver has copied response from TEE + */ +enum cmd_resp_state { + CMD_RESPONSE_INVALID, + CMD_WAITING_FOR_RESPONSE, + CMD_RESPONSE_TIMEDOUT, + CMD_RESPONSE_COPIED, +}; + +/** * struct tee_ring_cmd - Structure of the command buffer in TEE ring * @cmd_id: refers to &enum tee_cmd_id. Command id for the ring buffer * interface @@ -91,6 +94,7 @@ enum tee_cmd_state { * @pdata: private data (currently unused) * @res1: reserved region * @buf: TEE command specific buffer + * @flag: refers to &enum cmd_resp_state */ struct tee_ring_cmd { u32 cmd_id; @@ -100,6 +104,7 @@ struct tee_ring_cmd { u64 pdata; u32 res1[2]; u8 buf[MAX_BUFFER_SIZE]; + u32 flag; /* Total size: 1024 bytes */ } __packed; |