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-rw-r--r--security/tf_driver/scx_protocol.h676
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diff --git a/security/tf_driver/scx_protocol.h b/security/tf_driver/scx_protocol.h
new file mode 100644
index 000000000000..06a0bb792769
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+++ b/security/tf_driver/scx_protocol.h
@@ -0,0 +1,676 @@
+/*
+ * Copyright (c) 2006-2010 Trusted Logic S.A.
+ * All Rights Reserved.
+ *
+ * This program is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU General Public License
+ * version 2 as published by the Free Software Foundation.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program; if not, write to the Free Software
+ * Foundation, Inc., 59 Temple Place, Suite 330, Boston,
+ * MA 02111-1307 USA
+ */
+
+#ifndef __SCX_PROTOCOL_H__
+#define __SCX_PROTOCOL_H__
+
+/*----------------------------------------------------------------------------
+ *
+ * This header file defines the structure used in the SChannel Protocol.
+ * See your Product Reference Manual for a specification of the SChannel
+ * protocol.
+ *---------------------------------------------------------------------------*/
+
+/*
+ * The driver interface version returned by the version ioctl
+ */
+#define SCX_DRIVER_INTERFACE_VERSION 0x04000000
+
+/*
+ * Protocol version handling
+ */
+#define SCX_S_PROTOCOL_MAJOR_VERSION (0x06)
+#define GET_PROTOCOL_MAJOR_VERSION(a) (a >> 24)
+#define GET_PROTOCOL_MINOR_VERSION(a) ((a >> 16) & 0xFF)
+
+/*
+ * The size, in bytes, of the L1 Shared Buffer.
+ */
+#define SCX_COMM_BUFFER_SIZE (0x1000) /* 4kB*/
+
+/*
+ * The S flag of the nConfigFlags_S register.
+ */
+#define SCX_CONFIG_FLAG_S (1 << 3)
+
+/*
+ * The TimeSlot field of the nSyncSerial_N register.
+ */
+#define SCX_SYNC_SERIAL_TIMESLOT_N (1)
+
+/*
+ * nStatus_S related defines.
+ */
+#define SCX_STATUS_P_MASK (0X00000001)
+#define SCX_STATUS_POWER_STATE_SHIFT (3)
+#define SCX_STATUS_POWER_STATE_MASK (0x1F << SCX_STATUS_POWER_STATE_SHIFT)
+
+/*
+ * Possible power states of the POWER_STATE field of the nStatus_S register
+ */
+#define SCX_POWER_MODE_COLD_BOOT (0)
+#define SCX_POWER_MODE_WARM_BOOT (1)
+#define SCX_POWER_MODE_ACTIVE (3)
+#define SCX_POWER_MODE_READY_TO_SHUTDOWN (5)
+#define SCX_POWER_MODE_READY_TO_HIBERNATE (7)
+#define SCX_POWER_MODE_WAKEUP (8)
+#define SCX_POWER_MODE_PANIC (15)
+
+/*
+ * Possible nCommand values for MANAGEMENT commands
+ */
+#define SCX_MANAGEMENT_HIBERNATE (1)
+#define SCX_MANAGEMENT_SHUTDOWN (2)
+#define SCX_MANAGEMENT_PREPARE_FOR_CORE_OFF (3)
+#define SCX_MANAGEMENT_RESUME_FROM_CORE_OFF (4)
+
+/*
+ * The capacity of the Normal Word message queue, in number of slots.
+ */
+#define SCX_N_MESSAGE_QUEUE_CAPACITY (512)
+
+/*
+ * The capacity of the Secure World message answer queue, in number of slots.
+ */
+#define SCX_S_ANSWER_QUEUE_CAPACITY (256)
+
+/*
+ * The value of the S-timeout register indicating an infinite timeout.
+ */
+#define SCX_S_TIMEOUT_0_INFINITE (0xFFFFFFFF)
+#define SCX_S_TIMEOUT_1_INFINITE (0xFFFFFFFF)
+
+/*
+ * The value of the S-timeout register indicating an immediate timeout.
+ */
+#define SCX_S_TIMEOUT_0_IMMEDIATE (0x0)
+#define SCX_S_TIMEOUT_1_IMMEDIATE (0x0)
+
+/*
+ * Identifies the get protocol version SMC.
+ */
+#define SCX_SMC_GET_PROTOCOL_VERSION (0XFFFFFFFB)
+
+/*
+ * Identifies the init SMC.
+ */
+#define SCX_SMC_INIT (0XFFFFFFFF)
+
+/*
+ * Identifies the reset irq SMC.
+ */
+#define SCX_SMC_RESET_IRQ (0xFFFFFFFE)
+
+/*
+ * Identifies the SET_W3B SMC.
+ */
+#define SCX_SMC_WAKE_UP (0xFFFFFFFD)
+
+/*
+ * Identifies the STOP SMC.
+ */
+#define SCX_SMC_STOP (0xFFFFFFFC)
+
+/*
+ * Identifies the n-yield SMC.
+ */
+#define SCX_SMC_N_YIELD (0X00000003)
+
+
+/* Possible stop commands for SMC_STOP */
+#define SCSTOP_HIBERNATE (0xFFFFFFE1)
+#define SCSTOP_SHUTDOWN (0xFFFFFFE2)
+
+/*
+ * representation of an UUID.
+ */
+struct SCX_UUID {
+ u32 time_low;
+ u16 time_mid;
+ u16 time_hi_and_version;
+ u8 clock_seq_and_node[8];
+};
+
+
+/**
+ * Command parameters.
+ */
+struct SCX_COMMAND_PARAM_VALUE {
+ u32 a;
+ u32 b;
+};
+
+struct SCX_COMMAND_PARAM_TEMP_MEMREF {
+ u32 nDescriptor; /* data pointer for exchange message.*/
+ u32 nSize;
+ u32 nOffset;
+};
+
+struct SCX_COMMAND_PARAM_MEMREF {
+ u32 hBlock;
+ u32 nSize;
+ u32 nOffset;
+};
+
+union SCX_COMMAND_PARAM {
+ struct SCX_COMMAND_PARAM_VALUE sValue;
+ struct SCX_COMMAND_PARAM_TEMP_MEMREF sTempMemref;
+ struct SCX_COMMAND_PARAM_MEMREF sMemref;
+};
+
+/**
+ * Answer parameters.
+ */
+struct SCX_ANSWER_PARAM_VALUE {
+ u32 a;
+ u32 b;
+};
+
+struct SCX_ANSWER_PARAM_SIZE {
+ u32 _ignored;
+ u32 nSize;
+};
+
+union SCX_ANSWER_PARAM {
+ struct SCX_ANSWER_PARAM_SIZE sSize;
+ struct SCX_ANSWER_PARAM_VALUE sValue;
+};
+
+/*
+ * Descriptor tables capacity
+ */
+#define SCX_MAX_W3B_COARSE_PAGES (2)
+#define SCX_MAX_COARSE_PAGES (8)
+#define SCX_DESCRIPTOR_TABLE_CAPACITY_BIT_SHIFT (8)
+#define SCX_DESCRIPTOR_TABLE_CAPACITY \
+ (1 << SCX_DESCRIPTOR_TABLE_CAPACITY_BIT_SHIFT)
+#define SCX_DESCRIPTOR_TABLE_CAPACITY_MASK \
+ (SCX_DESCRIPTOR_TABLE_CAPACITY - 1)
+/* Shared memories coarse pages can map up to 1MB */
+#define SCX_MAX_COARSE_PAGE_MAPPED_SIZE \
+ (PAGE_SIZE * SCX_DESCRIPTOR_TABLE_CAPACITY)
+/* Shared memories cannot exceed 8MB */
+#define SCX_MAX_SHMEM_SIZE \
+ (SCX_MAX_COARSE_PAGE_MAPPED_SIZE << 3)
+
+/*
+ * Buffer size for version description fields
+ */
+#define SCX_DESCRIPTION_BUFFER_LENGTH 64
+
+/*
+ * Shared memory type flags.
+ */
+#define SCX_SHMEM_TYPE_READ (0x00000001)
+#define SCX_SHMEM_TYPE_WRITE (0x00000002)
+
+/*
+ * Shared mem flags
+ */
+#define SCX_SHARED_MEM_FLAG_INPUT 1
+#define SCX_SHARED_MEM_FLAG_OUTPUT 2
+#define SCX_SHARED_MEM_FLAG_INOUT 3
+
+
+/*
+ * Parameter types
+ */
+#define SCX_PARAM_TYPE_NONE 0x0
+#define SCX_PARAM_TYPE_VALUE_INPUT 0x1
+#define SCX_PARAM_TYPE_VALUE_OUTPUT 0x2
+#define SCX_PARAM_TYPE_VALUE_INOUT 0x3
+#define SCX_PARAM_TYPE_MEMREF_TEMP_INPUT 0x5
+#define SCX_PARAM_TYPE_MEMREF_TEMP_OUTPUT 0x6
+#define SCX_PARAM_TYPE_MEMREF_TEMP_INOUT 0x7
+#define SCX_PARAM_TYPE_MEMREF_INPUT 0xD
+#define SCX_PARAM_TYPE_MEMREF_OUTPUT 0xE
+#define SCX_PARAM_TYPE_MEMREF_INOUT 0xF
+
+#define SCX_PARAM_TYPE_MEMREF_FLAG 0x4
+#define SCX_PARAM_TYPE_REGISTERED_MEMREF_FLAG 0x8
+
+
+#define SCX_MAKE_PARAM_TYPES(t0, t1, t2, t3) \
+ ((t0) | ((t1) << 4) | ((t2) << 8) | ((t3) << 12))
+#define SCX_GET_PARAM_TYPE(t, i) (((t) >> (4 * i)) & 0xF)
+
+/*
+ * Login types.
+ */
+#define SCX_LOGIN_PUBLIC 0x00000000
+#define SCX_LOGIN_USER 0x00000001
+#define SCX_LOGIN_GROUP 0x00000002
+#define SCX_LOGIN_APPLICATION 0x00000004
+#define SCX_LOGIN_APPLICATION_USER 0x00000005
+#define SCX_LOGIN_APPLICATION_GROUP 0x00000006
+#define SCX_LOGIN_AUTHENTICATION 0x80000000
+#define SCX_LOGIN_PRIVILEGED 0x80000002
+
+/* Login variants */
+
+#define SCX_LOGIN_VARIANT(mainType, os, variant) \
+ ((mainType) | (1 << 27) | ((os) << 16) | ((variant) << 8))
+
+#define SCX_LOGIN_GET_MAIN_TYPE(type) \
+ ((type) & ~SCX_LOGIN_VARIANT(0, 0xFF, 0xFF))
+
+#define SCX_LOGIN_OS_ANY 0x00
+#define SCX_LOGIN_OS_LINUX 0x01
+#define SCX_LOGIN_OS_ANDROID 0x04
+
+/* OS-independent variants */
+#define SCX_LOGIN_USER_NONE \
+ SCX_LOGIN_VARIANT(SCX_LOGIN_USER, SCX_LOGIN_OS_ANY, 0xFF)
+#define SCX_LOGIN_GROUP_NONE \
+ SCX_LOGIN_VARIANT(SCX_LOGIN_GROUP, SCX_LOGIN_OS_ANY, 0xFF)
+#define SCX_LOGIN_APPLICATION_USER_NONE \
+ SCX_LOGIN_VARIANT(SCX_LOGIN_APPLICATION_USER, SCX_LOGIN_OS_ANY, 0xFF)
+#define SCX_LOGIN_AUTHENTICATION_BINARY_SHA1_HASH \
+ SCX_LOGIN_VARIANT(SCX_LOGIN_AUTHENTICATION, SCX_LOGIN_OS_ANY, 0x01)
+#define SCX_LOGIN_PRIVILEGED_KERNEL \
+ SCX_LOGIN_VARIANT(SCX_LOGIN_PRIVILEGED, SCX_LOGIN_OS_ANY, 0x01)
+
+/* Linux variants */
+#define SCX_LOGIN_USER_LINUX_EUID \
+ SCX_LOGIN_VARIANT(SCX_LOGIN_USER, SCX_LOGIN_OS_LINUX, 0x01)
+#define SCX_LOGIN_GROUP_LINUX_GID \
+ SCX_LOGIN_VARIANT(SCX_LOGIN_GROUP, SCX_LOGIN_OS_LINUX, 0x01)
+#define SCX_LOGIN_APPLICATION_LINUX_PATH_SHA1_HASH \
+ SCX_LOGIN_VARIANT(SCX_LOGIN_APPLICATION, SCX_LOGIN_OS_LINUX, 0x01)
+#define SCX_LOGIN_APPLICATION_USER_LINUX_PATH_EUID_SHA1_HASH \
+ SCX_LOGIN_VARIANT(SCX_LOGIN_APPLICATION_USER, SCX_LOGIN_OS_LINUX, 0x01)
+#define SCX_LOGIN_APPLICATION_GROUP_LINUX_PATH_GID_SHA1_HASH \
+ SCX_LOGIN_VARIANT(SCX_LOGIN_APPLICATION_GROUP, SCX_LOGIN_OS_LINUX, 0x01)
+
+/* Android variants */
+#define SCX_LOGIN_USER_ANDROID_EUID \
+ SCX_LOGIN_VARIANT(SCX_LOGIN_USER, SCX_LOGIN_OS_ANDROID, 0x01)
+#define SCX_LOGIN_GROUP_ANDROID_GID \
+ SCX_LOGIN_VARIANT(SCX_LOGIN_GROUP, SCX_LOGIN_OS_ANDROID, 0x01)
+#define SCX_LOGIN_APPLICATION_ANDROID_UID \
+ SCX_LOGIN_VARIANT(SCX_LOGIN_APPLICATION, SCX_LOGIN_OS_ANDROID, 0x01)
+#define SCX_LOGIN_APPLICATION_USER_ANDROID_UID_EUID \
+ SCX_LOGIN_VARIANT(SCX_LOGIN_APPLICATION_USER, SCX_LOGIN_OS_ANDROID, \
+ 0x01)
+#define SCX_LOGIN_APPLICATION_GROUP_ANDROID_UID_GID \
+ SCX_LOGIN_VARIANT(SCX_LOGIN_APPLICATION_GROUP, SCX_LOGIN_OS_ANDROID, \
+ 0x01)
+
+/*
+ * return origins
+ */
+#define SCX_ORIGIN_COMMS 2
+#define SCX_ORIGIN_TEE 3
+#define SCX_ORIGIN_TRUSTED_APP 4
+/*
+ * The SCX message types.
+ */
+#define SCX_MESSAGE_TYPE_CREATE_DEVICE_CONTEXT 0x02
+#define SCX_MESSAGE_TYPE_DESTROY_DEVICE_CONTEXT 0xFD
+#define SCX_MESSAGE_TYPE_REGISTER_SHARED_MEMORY 0xF7
+#define SCX_MESSAGE_TYPE_RELEASE_SHARED_MEMORY 0xF9
+#define SCX_MESSAGE_TYPE_OPEN_CLIENT_SESSION 0xF0
+#define SCX_MESSAGE_TYPE_CLOSE_CLIENT_SESSION 0xF2
+#define SCX_MESSAGE_TYPE_INVOKE_CLIENT_COMMAND 0xF5
+#define SCX_MESSAGE_TYPE_CANCEL_CLIENT_COMMAND 0xF4
+#define SCX_MESSAGE_TYPE_MANAGEMENT 0xFE
+
+
+/*
+ * The error codes
+ */
+#define S_SUCCESS 0x00000000
+#define S_ERROR_NO_DATA 0xFFFF000B
+#define S_ERROR_OUT_OF_MEMORY 0xFFFF000C
+
+
+struct SCX_COMMAND_HEADER {
+ u8 nMessageSize;
+ u8 nMessageType;
+ u16 nMessageInfo;
+ u32 nOperationID;
+};
+
+struct SCX_ANSWER_HEADER {
+ u8 nMessageSize;
+ u8 nMessageType;
+ u16 nMessageInfo;
+ u32 nOperationID;
+ u32 nErrorCode;
+};
+
+/*
+ * CREATE_DEVICE_CONTEXT command message.
+ */
+struct SCX_COMMAND_CREATE_DEVICE_CONTEXT {
+ u8 nMessageSize;
+ u8 nMessageType;
+ u16 nMessageInfo_RFU;
+ u32 nOperationID;
+ u32 nDeviceContextID;
+};
+
+/*
+ * CREATE_DEVICE_CONTEXT answer message.
+ */
+struct SCX_ANSWER_CREATE_DEVICE_CONTEXT {
+ u8 nMessageSize;
+ u8 nMessageType;
+ u16 nMessageInfo_RFU;
+ /* an opaque Normal World identifier for the operation */
+ u32 nOperationID;
+ u32 nErrorCode;
+ /* an opaque Normal World identifier for the device context */
+ u32 hDeviceContext;
+};
+
+/*
+ * DESTROY_DEVICE_CONTEXT command message.
+ */
+struct SCX_COMMAND_DESTROY_DEVICE_CONTEXT {
+ u8 nMessageSize;
+ u8 nMessageType;
+ u16 nMessageInfo_RFU;
+ u32 nOperationID;
+ u32 hDeviceContext;
+};
+
+/*
+ * DESTROY_DEVICE_CONTEXT answer message.
+ */
+struct SCX_ANSWER_DESTROY_DEVICE_CONTEXT {
+ u8 nMessageSize;
+ u8 nMessageType;
+ u16 nMessageInfo_RFU;
+ /* an opaque Normal World identifier for the operation */
+ u32 nOperationID;
+ u32 nErrorCode;
+ u32 nDeviceContextID;
+};
+
+/*
+ * OPEN_CLIENT_SESSION command message.
+ */
+struct SCX_COMMAND_OPEN_CLIENT_SESSION {
+ u8 nMessageSize;
+ u8 nMessageType;
+ u16 nParamTypes;
+ /* an opaque Normal World identifier for the operation */
+ u32 nOperationID;
+ u32 hDeviceContext;
+ u32 nCancellationID;
+ u64 sTimeout;
+ struct SCX_UUID sDestinationUUID;
+ union SCX_COMMAND_PARAM sParams[4];
+ u32 nLoginType;
+ /*
+ * Size = 0 for public, [16] for group identification, [20] for
+ * authentication
+ */
+ u8 sLoginData[20];
+};
+
+/*
+ * OPEN_CLIENT_SESSION answer message.
+ */
+struct SCX_ANSWER_OPEN_CLIENT_SESSION {
+ u8 nMessageSize;
+ u8 nMessageType;
+ u8 nReturnOrigin;
+ u8 __nReserved;
+ /* an opaque Normal World identifier for the operation */
+ u32 nOperationID;
+ u32 nErrorCode;
+ u32 hClientSession;
+ union SCX_ANSWER_PARAM sAnswers[4];
+};
+
+/*
+ * CLOSE_CLIENT_SESSION command message.
+ */
+struct SCX_COMMAND_CLOSE_CLIENT_SESSION {
+ u8 nMessageSize;
+ u8 nMessageType;
+ u16 nMessageInfo_RFU;
+ /* an opaque Normal World identifier for the operation */
+ u32 nOperationID;
+ u32 hDeviceContext;
+ u32 hClientSession;
+};
+
+/*
+ * CLOSE_CLIENT_SESSION answer message.
+ */
+struct SCX_ANSWER_CLOSE_CLIENT_SESSION {
+ u8 nMessageSize;
+ u8 nMessageType;
+ u16 nMessageInfo_RFU;
+ /* an opaque Normal World identifier for the operation */
+ u32 nOperationID;
+ u32 nErrorCode;
+};
+
+
+/*
+ * REGISTER_SHARED_MEMORY command message
+ */
+struct SCX_COMMAND_REGISTER_SHARED_MEMORY {
+ u8 nMessageSize;
+ u8 nMessageType;
+ u16 nMemoryFlags;
+ u32 nOperationID;
+ u32 hDeviceContext;
+ u32 nBlockID;
+ u32 nSharedMemSize;
+ u32 nSharedMemStartOffset;
+ u32 nSharedMemDescriptors[SCX_MAX_COARSE_PAGES];
+};
+
+/*
+ * REGISTER_SHARED_MEMORY answer message.
+ */
+struct SCX_ANSWER_REGISTER_SHARED_MEMORY {
+ u8 nMessageSize;
+ u8 nMessageType;
+ u16 nMessageInfo_RFU;
+ /* an opaque Normal World identifier for the operation */
+ u32 nOperationID;
+ u32 nErrorCode;
+ u32 hBlock;
+};
+
+/*
+ * RELEASE_SHARED_MEMORY command message.
+ */
+struct SCX_COMMAND_RELEASE_SHARED_MEMORY {
+ u8 nMessageSize;
+ u8 nMessageType;
+ u16 nMessageInfo_RFU;
+ /* an opaque Normal World identifier for the operation */
+ u32 nOperationID;
+ u32 hDeviceContext;
+ u32 hBlock;
+};
+
+/*
+ * RELEASE_SHARED_MEMORY answer message.
+ */
+struct SCX_ANSWER_RELEASE_SHARED_MEMORY {
+ u8 nMessageSize;
+ u8 nMessageType;
+ u16 nMessageInfo_RFU;
+ u32 nOperationID;
+ u32 nErrorCode;
+ u32 nBlockID;
+};
+
+/*
+ * INVOKE_CLIENT_COMMAND command message.
+ */
+struct SCX_COMMAND_INVOKE_CLIENT_COMMAND {
+ u8 nMessageSize;
+ u8 nMessageType;
+ u16 nParamTypes;
+ u32 nOperationID;
+ u32 hDeviceContext;
+ u32 hClientSession;
+ u64 sTimeout;
+ u32 nCancellationID;
+ u32 nClientCommandIdentifier;
+ union SCX_COMMAND_PARAM sParams[4];
+};
+
+/*
+ * INVOKE_CLIENT_COMMAND command answer.
+ */
+struct SCX_ANSWER_INVOKE_CLIENT_COMMAND {
+ u8 nMessageSize;
+ u8 nMessageType;
+ u8 nReturnOrigin;
+ u8 __nReserved;
+ u32 nOperationID;
+ u32 nErrorCode;
+ union SCX_ANSWER_PARAM sAnswers[4];
+};
+
+/*
+ * CANCEL_CLIENT_OPERATION command message.
+ */
+struct SCX_COMMAND_CANCEL_CLIENT_OPERATION {
+ u8 nMessageSize;
+ u8 nMessageType;
+ u16 nMessageInfo_RFU;
+ /* an opaque Normal World identifier for the operation */
+ u32 nOperationID;
+ u32 hDeviceContext;
+ u32 hClientSession;
+ u32 nCancellationID;
+};
+
+struct SCX_ANSWER_CANCEL_CLIENT_OPERATION {
+ u8 nMessageSize;
+ u8 nMessageType;
+ u16 nMessageInfo_RFU;
+ u32 nOperationID;
+ u32 nErrorCode;
+};
+
+/*
+ * MANAGEMENT command message.
+ */
+struct SCX_COMMAND_MANAGEMENT {
+ u8 nMessageSize;
+ u8 nMessageType;
+ u16 nCommand;
+ u32 nOperationID;
+ u32 nW3BSize;
+ u32 nW3BStartOffset;
+ u32 nSharedMemDescriptors[1];
+};
+
+/*
+ * POWER_MANAGEMENT answer message.
+ * The message does not provide message specific parameters.
+ * Therefore no need to define a specific answer structure
+ */
+
+/*
+ * Structure for L2 messages
+ */
+union SCX_COMMAND_MESSAGE {
+ struct SCX_COMMAND_HEADER sHeader;
+ struct SCX_COMMAND_CREATE_DEVICE_CONTEXT sCreateDeviceContextMessage;
+ struct SCX_COMMAND_DESTROY_DEVICE_CONTEXT sDestroyDeviceContextMessage;
+ struct SCX_COMMAND_OPEN_CLIENT_SESSION sOpenClientSessionMessage;
+ struct SCX_COMMAND_CLOSE_CLIENT_SESSION sCloseClientSessionMessage;
+ struct SCX_COMMAND_REGISTER_SHARED_MEMORY sRegisterSharedMemoryMessage;
+ struct SCX_COMMAND_RELEASE_SHARED_MEMORY sReleaseSharedMemoryMessage;
+ struct SCX_COMMAND_INVOKE_CLIENT_COMMAND sInvokeClientCommandMessage;
+ struct SCX_COMMAND_CANCEL_CLIENT_OPERATION
+ sCancelClientOperationMessage;
+ struct SCX_COMMAND_MANAGEMENT sManagementMessage;
+};
+
+/*
+ * Structure for any L2 answer
+ */
+
+union SCX_ANSWER_MESSAGE {
+ struct SCX_ANSWER_HEADER sHeader;
+ struct SCX_ANSWER_CREATE_DEVICE_CONTEXT sCreateDeviceContextAnswer;
+ struct SCX_ANSWER_OPEN_CLIENT_SESSION sOpenClientSessionAnswer;
+ struct SCX_ANSWER_CLOSE_CLIENT_SESSION sCloseClientSessionAnswer;
+ struct SCX_ANSWER_REGISTER_SHARED_MEMORY sRegisterSharedMemoryAnswer;
+ struct SCX_ANSWER_RELEASE_SHARED_MEMORY sReleaseSharedMemoryAnswer;
+ struct SCX_ANSWER_INVOKE_CLIENT_COMMAND sInvokeClientCommandAnswer;
+ struct SCX_ANSWER_DESTROY_DEVICE_CONTEXT sDestroyDeviceContextAnswer;
+ struct SCX_ANSWER_CANCEL_CLIENT_OPERATION sCancelClientOperationAnswer;
+};
+
+/* Structure of the Communication Buffer */
+struct SCHANNEL_C1S_BUFFER {
+ u32 nConfigFlags_S;
+ u32 nW3BSizeMax_S;
+ u32 nReserved0;
+ u32 nW3BSizeCurrent_S;
+ u8 sReserved1[48];
+ u8 sVersionDescription[SCX_DESCRIPTION_BUFFER_LENGTH];
+ u32 nStatus_S;
+ u32 sReserved2;
+ u32 nSyncSerial_N;
+ u32 nSyncSerial_S;
+ u64 sTime_N[2];
+ u64 sTimeout_S[2];
+ u32 nFirstCommand;
+ u32 nFirstFreeCommand;
+ u32 nFirstAnswer;
+ u32 nFirstFreeAnswer;
+ u32 nW3BDescriptors[128];
+ #ifdef CONFIG_TF_ZEBRA
+ u8 sRPCTraceBuffer[140];
+ u8 sRPCShortcutBuffer[180];
+ #else
+ u8 sReserved3[320];
+ #endif
+ u32 sCommandQueue[SCX_N_MESSAGE_QUEUE_CAPACITY];
+ u32 sAnswerQueue[SCX_S_ANSWER_QUEUE_CAPACITY];
+};
+
+
+/*
+ * SCX_VERSION_INFORMATION_BUFFER structure description
+ * Description of the sVersionBuffer handed over from user space to kernel space
+ * This field is filled by the driver during a CREATE_DEVICE_CONTEXT ioctl
+ * and handed back to user space
+ */
+struct SCX_VERSION_INFORMATION_BUFFER {
+ u8 sDriverDescription[65];
+ u8 sSecureWorldDescription[65];
+};
+
+
+/* The IOCTLs the driver supports */
+#include <linux/ioctl.h>
+
+#define IOCTL_SCX_GET_VERSION _IO('z', 0)
+#define IOCTL_SCX_EXCHANGE _IOWR('z', 1, union SCX_COMMAND_MESSAGE)
+#define IOCTL_SCX_GET_DESCRIPTION _IOR('z', 2, \
+ struct SCX_VERSION_INFORMATION_BUFFER)
+
+#endif /* !defined(__SCX_PROTOCOL_H__) */
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