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-rw-r--r--drivers/tee/amdtee/amdtee_private.h172
1 files changed, 172 insertions, 0 deletions
diff --git a/drivers/tee/amdtee/amdtee_private.h b/drivers/tee/amdtee/amdtee_private.h
new file mode 100644
index 0000000000..6d0f7062bb
--- /dev/null
+++ b/drivers/tee/amdtee/amdtee_private.h
@@ -0,0 +1,172 @@
+/* SPDX-License-Identifier: MIT */
+
+/*
+ * Copyright 2019 Advanced Micro Devices, Inc.
+ */
+
+#ifndef AMDTEE_PRIVATE_H
+#define AMDTEE_PRIVATE_H
+
+#include <linux/mutex.h>
+#include <linux/spinlock.h>
+#include <linux/tee_drv.h>
+#include <linux/kref.h>
+#include <linux/types.h>
+#include "amdtee_if.h"
+
+#define DRIVER_NAME "amdtee"
+#define DRIVER_AUTHOR "AMD-TEE Linux driver team"
+
+/* Some GlobalPlatform error codes used in this driver */
+#define TEEC_SUCCESS 0x00000000
+#define TEEC_ERROR_GENERIC 0xFFFF0000
+#define TEEC_ERROR_BAD_PARAMETERS 0xFFFF0006
+#define TEEC_ERROR_OUT_OF_MEMORY 0xFFFF000C
+#define TEEC_ERROR_COMMUNICATION 0xFFFF000E
+
+#define TEEC_ORIGIN_COMMS 0x00000002
+
+/* Maximum number of sessions which can be opened with a Trusted Application */
+#define TEE_NUM_SESSIONS 32
+
+#define TA_LOAD_PATH "/amdtee"
+#define TA_PATH_MAX 60
+
+/**
+ * struct amdtee - main service struct
+ * @teedev: client device
+ * @pool: shared memory pool
+ */
+struct amdtee {
+ struct tee_device *teedev;
+ struct tee_shm_pool *pool;
+};
+
+/**
+ * struct amdtee_session - Trusted Application (TA) session related information.
+ * @ta_handle: handle to Trusted Application (TA) loaded in TEE environment
+ * @refcount: counter to keep track of sessions opened for the TA instance
+ * @session_info: an array pointing to TA allocated session data.
+ * @sess_mask: session usage bit-mask. If a particular bit is set, then the
+ * corresponding @session_info entry is in use or valid.
+ *
+ * Session structure is updated on open_session and this information is used for
+ * subsequent operations with the Trusted Application.
+ */
+struct amdtee_session {
+ struct list_head list_node;
+ u32 ta_handle;
+ struct kref refcount;
+ u32 session_info[TEE_NUM_SESSIONS];
+ DECLARE_BITMAP(sess_mask, TEE_NUM_SESSIONS);
+ spinlock_t lock; /* synchronizes access to @sess_mask */
+};
+
+/**
+ * struct amdtee_context_data - AMD-TEE driver context data
+ * @sess_list: Keeps track of sessions opened in current TEE context
+ * @shm_list: Keeps track of buffers allocated and mapped in current TEE
+ * context
+ */
+struct amdtee_context_data {
+ struct list_head sess_list;
+ struct list_head shm_list;
+ struct mutex shm_mutex; /* synchronizes access to @shm_list */
+};
+
+struct amdtee_driver_data {
+ struct amdtee *amdtee;
+};
+
+struct shmem_desc {
+ void *kaddr;
+ u64 size;
+};
+
+/**
+ * struct amdtee_shm_data - Shared memory data
+ * @kaddr: Kernel virtual address of shared memory
+ * @buf_id: Buffer id of memory mapped by TEE_CMD_ID_MAP_SHARED_MEM
+ */
+struct amdtee_shm_data {
+ struct list_head shm_node;
+ void *kaddr;
+ u32 buf_id;
+};
+
+/**
+ * struct amdtee_ta_data - Keeps track of all TAs loaded in AMD Secure
+ * Processor
+ * @ta_handle: Handle to TA loaded in TEE
+ * @refcount: Reference count for the loaded TA
+ */
+struct amdtee_ta_data {
+ struct list_head list_node;
+ u32 ta_handle;
+ u32 refcount;
+};
+
+#define LOWER_TWO_BYTE_MASK 0x0000FFFF
+
+/**
+ * set_session_id() - Sets the session identifier.
+ * @ta_handle: [in] handle of the loaded Trusted Application (TA)
+ * @session_index: [in] Session index. Range: 0 to (TEE_NUM_SESSIONS - 1).
+ * @session: [out] Pointer to session id
+ *
+ * Lower two bytes of the session identifier represents the TA handle and the
+ * upper two bytes is session index.
+ */
+static inline void set_session_id(u32 ta_handle, u32 session_index,
+ u32 *session)
+{
+ *session = (session_index << 16) | (LOWER_TWO_BYTE_MASK & ta_handle);
+}
+
+static inline u32 get_ta_handle(u32 session)
+{
+ return session & LOWER_TWO_BYTE_MASK;
+}
+
+static inline u32 get_session_index(u32 session)
+{
+ return (session >> 16) & LOWER_TWO_BYTE_MASK;
+}
+
+int amdtee_open_session(struct tee_context *ctx,
+ struct tee_ioctl_open_session_arg *arg,
+ struct tee_param *param);
+
+int amdtee_close_session(struct tee_context *ctx, u32 session);
+
+int amdtee_invoke_func(struct tee_context *ctx,
+ struct tee_ioctl_invoke_arg *arg,
+ struct tee_param *param);
+
+int amdtee_cancel_req(struct tee_context *ctx, u32 cancel_id, u32 session);
+
+int amdtee_map_shmem(struct tee_shm *shm);
+
+void amdtee_unmap_shmem(struct tee_shm *shm);
+
+int handle_load_ta(void *data, u32 size,
+ struct tee_ioctl_open_session_arg *arg);
+
+int handle_unload_ta(u32 ta_handle);
+
+int handle_open_session(struct tee_ioctl_open_session_arg *arg, u32 *info,
+ struct tee_param *p);
+
+int handle_close_session(u32 ta_handle, u32 info);
+
+int handle_map_shmem(u32 count, struct shmem_desc *start, u32 *buf_id);
+
+void handle_unmap_shmem(u32 buf_id);
+
+int handle_invoke_cmd(struct tee_ioctl_invoke_arg *arg, u32 sinfo,
+ struct tee_param *p);
+
+struct tee_shm_pool *amdtee_config_shm(void);
+
+u32 get_buffer_id(struct tee_shm *shm);
+#endif /*AMDTEE_PRIVATE_H*/