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2024-05-10 093a6c67005148ae32a5c9e4553491b9f5c2457b 
 kernel/include/linux/tee_drv.h
....@@ -1,25 +1,19 @@
1
+/* SPDX-License-Identifier: GPL-2.0-only */
12 /*
23  * Copyright (c) 2015-2016, Linaro Limited
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- *
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- * This software is licensed under the terms of the GNU General Public
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- * License version 2, as published by the Free Software Foundation, and
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- * may be copied, distributed, and modified under those terms.
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- *
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- * This program is distributed in the hope that it will be useful,
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- * but WITHOUT ANY WARRANTY; without even the implied warranty of
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- * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
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- * GNU General Public License for more details.
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- *
134  */
145 
156 #ifndef __TEE_DRV_H
167 #define __TEE_DRV_H
178 
18
-#include <linux/types.h>
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+#include <linux/device.h>
1910 #include <linux/idr.h>
2011 #include <linux/kref.h>
2112 #include <linux/list.h>
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+#include <linux/mod_devicetable.h>
2214 #include <linux/tee.h>
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+#include <linux/types.h>
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+#include <linux/uuid.h>
2317 
2418 /*
2519  * The file describes the API provided by the generic TEE driver to the
....@@ -32,6 +26,8 @@
3226 #define TEE_SHM_REGISTER	BIT(3)  /* Memory registered in secure world */
3327 #define TEE_SHM_USER_MAPPED	BIT(4)  /* Memory mapped in user space */
3428 #define TEE_SHM_POOL		BIT(5)  /* Memory allocated from pool */
29
+#define TEE_SHM_KERNEL_MAPPED	BIT(6)  /* Memory mapped in kernel space */
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+#define TEE_SHM_PRIV		BIT(7)  /* Memory private to TEE driver */
3531 
3632 struct device;
3733 struct tee_device;
....@@ -47,13 +43,21 @@
4743  * @releasing:  flag that indicates if context is being released right now.
4844  *		It is needed to break circular dependency on context during
4945  *              shared memory release.
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+ * @supp_nowait: flag that indicates that requests in this context should not
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+ *              wait for tee-supplicant daemon to be started if not present
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+ *              and just return with an error code. It is needed for requests
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+ *              that arises from TEE based kernel drivers that should be
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+ *              non-blocking in nature.
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+ * @cap_memref_null: flag indicating if the TEE Client support shared
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+ *                   memory buffer with a NULL pointer.
5053  */
5154 struct tee_context {
5255 	struct tee_device *teedev;
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-	struct list_head list_shm;
5456 	void *data;
5557 	struct kref refcount;
5658 	bool releasing;
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+	bool supp_nowait;
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+	bool cap_memref_null;
5761 };
5862 
5963 struct tee_param_memref {
....@@ -167,10 +171,24 @@
167171 void tee_device_unregister(struct tee_device *teedev);
168172 
169173 /**
174
+ * tee_session_calc_client_uuid() - Calculates client UUID for session
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+ * @uuid:		Resulting UUID
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+ * @connection_method:	Connection method for session (TEE_IOCTL_LOGIN_*)
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+ * @connectuon_data:	Connection data for opening session
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+ *
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+ * Based on connection method calculates UUIDv5 based client UUID.
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+ *
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+ * For group based logins verifies that calling process has specified
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+ * credentials.
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+ *
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+ * @return < 0 on failure
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+ */
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+int tee_session_calc_client_uuid(uuid_t *uuid, u32 connection_method,
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+				 const u8 connection_data[TEE_IOCTL_UUID_LEN]);
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+
189
+/**
170190  * struct tee_shm - shared memory object
171
- * @teedev:	device used to allocate the object
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- * @ctx:	context using the object, if NULL the context is gone
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- * @link	link element
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+ * @ctx:	context using the object
174192  * @paddr:	physical address of the shared memory
175193  * @kaddr:	virtual address of the shared memory
176194  * @size:	size of shared memory
....@@ -185,9 +203,7 @@
185203  * subsystem and from drivers that implements their own shm pool manager.
186204  */
187205 struct tee_shm {
188
-	struct tee_device *teedev;
189206 	struct tee_context *ctx;
190
-	struct list_head link;
191207 	phys_addr_t paddr;
192208 	void *kaddr;
193209 	size_t size;
....@@ -317,18 +333,7 @@
317333  * @returns a pointer to 'struct tee_shm'
318334  */
319335 struct tee_shm *tee_shm_alloc(struct tee_context *ctx, size_t size, u32 flags);
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-
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-/**
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- * tee_shm_priv_alloc() - Allocate shared memory privately
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- * @dev:	Device that allocates the shared memory
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- * @size:	Requested size of shared memory
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- *
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- * Allocates shared memory buffer that is not associated with any client
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- * context. Such buffers are owned by TEE driver and used for internal calls.
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- *
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- * @returns a pointer to 'struct tee_shm'
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- */
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-struct tee_shm *tee_shm_priv_alloc(struct tee_device *teedev, size_t size);
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+struct tee_shm *tee_shm_alloc_kernel_buf(struct tee_context *ctx, size_t size);
332337 
333338 /**
334339  * tee_shm_register() - Register shared memory buffer
....@@ -453,6 +458,91 @@
453458  */
454459 struct tee_shm *tee_shm_get_from_id(struct tee_context *ctx, int id);
455460 
461
+/**
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+ * tee_client_open_context() - Open a TEE context
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+ * @start:	if not NULL, continue search after this context
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+ * @match:	function to check TEE device
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+ * @data:	data for match function
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+ * @vers:	if not NULL, version data of TEE device of the context returned
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+ *
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+ * This function does an operation similar to open("/dev/teeX") in user space.
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+ * A returned context must be released with tee_client_close_context().
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+ *
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+ * Returns a TEE context of the first TEE device matched by the match()
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+ * callback or an ERR_PTR.
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+ */
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+struct tee_context *
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+tee_client_open_context(struct tee_context *start,
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+			int (*match)(struct tee_ioctl_version_data *,
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+				     const void *),
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+			const void *data, struct tee_ioctl_version_data *vers);
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+
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+/**
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+ * tee_client_close_context() - Close a TEE context
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+ * @ctx:	TEE context to close
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+ *
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+ * Note that all sessions previously opened with this context will be
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+ * closed when this function is called.
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+ */
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+void tee_client_close_context(struct tee_context *ctx);
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+
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+/**
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+ * tee_client_get_version() - Query version of TEE
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+ * @ctx:	TEE context to TEE to query
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+ * @vers:	Pointer to version data
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+ */
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+void tee_client_get_version(struct tee_context *ctx,
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+			    struct tee_ioctl_version_data *vers);
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+
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+/**
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+ * tee_client_open_session() - Open a session to a Trusted Application
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+ * @ctx:	TEE context
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+ * @arg:	Open session arguments, see description of
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+ *		struct tee_ioctl_open_session_arg
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+ * @param:	Parameters passed to the Trusted Application
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+ *
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+ * Returns < 0 on error else see @arg->ret for result. If @arg->ret
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+ * is TEEC_SUCCESS the session identifier is available in @arg->session.
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+ */
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+int tee_client_open_session(struct tee_context *ctx,
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+			    struct tee_ioctl_open_session_arg *arg,
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+			    struct tee_param *param);
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+
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+/**
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+ * tee_client_close_session() - Close a session to a Trusted Application
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+ * @ctx:	TEE Context
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+ * @session:	Session id
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+ *
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+ * Return < 0 on error else 0, regardless the session will not be
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+ * valid after this function has returned.
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+ */
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+int tee_client_close_session(struct tee_context *ctx, u32 session);
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+
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+/**
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+ * tee_client_invoke_func() - Invoke a function in a Trusted Application
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+ * @ctx:	TEE Context
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+ * @arg:	Invoke arguments, see description of
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+ *		struct tee_ioctl_invoke_arg
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+ * @param:	Parameters passed to the Trusted Application
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+ *
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+ * Returns < 0 on error else see @arg->ret for result.
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+ */
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+int tee_client_invoke_func(struct tee_context *ctx,
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+			   struct tee_ioctl_invoke_arg *arg,
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+			   struct tee_param *param);
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+
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+/**
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+ * tee_client_cancel_req() - Request cancellation of the previous open-session
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+ * or invoke-command operations in a Trusted Application
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+ * @ctx:       TEE Context
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+ * @arg:       Cancellation arguments, see description of
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+ *             struct tee_ioctl_cancel_arg
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+ *
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+ * Returns < 0 on error else 0 if the cancellation was successfully requested.
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+ */
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+int tee_client_cancel_req(struct tee_context *ctx,
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+			  struct tee_ioctl_cancel_arg *arg);
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+
456546 static inline bool tee_param_is_memref(struct tee_param *param)
457547 {
458548 	switch (param->attr & TEE_IOCTL_PARAM_ATTR_TYPE_MASK) {
....@@ -465,4 +555,45 @@
465555 	}
466556 }
467557 
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+extern struct bus_type tee_bus_type;
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+
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+/**
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+ * struct tee_client_device - tee based device
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+ * @id:			device identifier
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+ * @dev:		device structure
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+ */
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+struct tee_client_device {
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+	struct tee_client_device_id id;
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+	struct device dev;
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+};
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+
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+#define to_tee_client_device(d) container_of(d, struct tee_client_device, dev)
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+
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+/**
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+ * struct tee_client_driver - tee client driver
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+ * @id_table:		device id table supported by this driver
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+ * @driver:		driver structure
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+ */
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+struct tee_client_driver {
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+	const struct tee_client_device_id *id_table;
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+	struct device_driver driver;
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+};
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+
582
+#define to_tee_client_driver(d) \
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+		container_of(d, struct tee_client_driver, driver)
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+
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+/**
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+ * teedev_open() - Open a struct tee_device
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+ * @teedev:	Device to open
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+ *
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+ * @return a pointer to struct tee_context on success or an ERR_PTR on failure.
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+ */
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+struct tee_context *teedev_open(struct tee_device *teedev);
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+
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+/**
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+ * teedev_close_context() - closes a struct tee_context
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+ * @ctx:	The struct tee_context to close
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+ */
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+void teedev_close_context(struct tee_context *ctx);
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+
468599 #endif /*__TEE_DRV_H*/