mirror of
https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git
synced 2024-08-27 03:10:12 +00:00
![Jens Wiklander](/assets/img/avatar_default.png)
The ctx element in struct tee_shm is always valid. So remove the now redundant teedev element. Signed-off-by: Jens Wiklander <jens.wiklander@linaro.org>
563 lines
17 KiB
C
563 lines
17 KiB
C
/* SPDX-License-Identifier: GPL-2.0-only */
|
|
/*
|
|
* Copyright (c) 2015-2016, Linaro Limited
|
|
*/
|
|
|
|
#ifndef __TEE_DRV_H
|
|
#define __TEE_DRV_H
|
|
|
|
#include <linux/device.h>
|
|
#include <linux/idr.h>
|
|
#include <linux/kref.h>
|
|
#include <linux/list.h>
|
|
#include <linux/mod_devicetable.h>
|
|
#include <linux/tee.h>
|
|
#include <linux/types.h>
|
|
#include <linux/uuid.h>
|
|
|
|
/*
|
|
* The file describes the API provided by the generic TEE driver to the
|
|
* specific TEE driver.
|
|
*/
|
|
|
|
#define TEE_SHM_MAPPED BIT(0) /* Memory mapped by the kernel */
|
|
#define TEE_SHM_DMA_BUF BIT(1) /* Memory with dma-buf handle */
|
|
#define TEE_SHM_EXT_DMA_BUF BIT(2) /* Memory with dma-buf handle */
|
|
#define TEE_SHM_REGISTER BIT(3) /* Memory registered in secure world */
|
|
#define TEE_SHM_USER_MAPPED BIT(4) /* Memory mapped in user space */
|
|
#define TEE_SHM_POOL BIT(5) /* Memory allocated from pool */
|
|
|
|
struct device;
|
|
struct tee_device;
|
|
struct tee_shm;
|
|
struct tee_shm_pool;
|
|
|
|
/**
|
|
* struct tee_context - driver specific context on file pointer data
|
|
* @teedev: pointer to this drivers struct tee_device
|
|
* @list_shm: List of shared memory object owned by this context
|
|
* @data: driver specific context data, managed by the driver
|
|
* @refcount: reference counter for this structure
|
|
* @releasing: flag that indicates if context is being released right now.
|
|
* It is needed to break circular dependency on context during
|
|
* shared memory release.
|
|
* @supp_nowait: flag that indicates that requests in this context should not
|
|
* wait for tee-supplicant daemon to be started if not present
|
|
* and just return with an error code. It is needed for requests
|
|
* that arises from TEE based kernel drivers that should be
|
|
* non-blocking in nature.
|
|
*/
|
|
struct tee_context {
|
|
struct tee_device *teedev;
|
|
void *data;
|
|
struct kref refcount;
|
|
bool releasing;
|
|
bool supp_nowait;
|
|
};
|
|
|
|
struct tee_param_memref {
|
|
size_t shm_offs;
|
|
size_t size;
|
|
struct tee_shm *shm;
|
|
};
|
|
|
|
struct tee_param_value {
|
|
u64 a;
|
|
u64 b;
|
|
u64 c;
|
|
};
|
|
|
|
struct tee_param {
|
|
u64 attr;
|
|
union {
|
|
struct tee_param_memref memref;
|
|
struct tee_param_value value;
|
|
} u;
|
|
};
|
|
|
|
/**
|
|
* struct tee_driver_ops - driver operations vtable
|
|
* @get_version: returns version of driver
|
|
* @open: called when the device file is opened
|
|
* @release: release this open file
|
|
* @open_session: open a new session
|
|
* @close_session: close a session
|
|
* @invoke_func: invoke a trusted function
|
|
* @cancel_req: request cancel of an ongoing invoke or open
|
|
* @supp_revc: called for supplicant to get a command
|
|
* @supp_send: called for supplicant to send a response
|
|
* @shm_register: register shared memory buffer in TEE
|
|
* @shm_unregister: unregister shared memory buffer in TEE
|
|
*/
|
|
struct tee_driver_ops {
|
|
void (*get_version)(struct tee_device *teedev,
|
|
struct tee_ioctl_version_data *vers);
|
|
int (*open)(struct tee_context *ctx);
|
|
void (*release)(struct tee_context *ctx);
|
|
int (*open_session)(struct tee_context *ctx,
|
|
struct tee_ioctl_open_session_arg *arg,
|
|
struct tee_param *param);
|
|
int (*close_session)(struct tee_context *ctx, u32 session);
|
|
int (*invoke_func)(struct tee_context *ctx,
|
|
struct tee_ioctl_invoke_arg *arg,
|
|
struct tee_param *param);
|
|
int (*cancel_req)(struct tee_context *ctx, u32 cancel_id, u32 session);
|
|
int (*supp_recv)(struct tee_context *ctx, u32 *func, u32 *num_params,
|
|
struct tee_param *param);
|
|
int (*supp_send)(struct tee_context *ctx, u32 ret, u32 num_params,
|
|
struct tee_param *param);
|
|
int (*shm_register)(struct tee_context *ctx, struct tee_shm *shm,
|
|
struct page **pages, size_t num_pages,
|
|
unsigned long start);
|
|
int (*shm_unregister)(struct tee_context *ctx, struct tee_shm *shm);
|
|
};
|
|
|
|
/**
|
|
* struct tee_desc - Describes the TEE driver to the subsystem
|
|
* @name: name of driver
|
|
* @ops: driver operations vtable
|
|
* @owner: module providing the driver
|
|
* @flags: Extra properties of driver, defined by TEE_DESC_* below
|
|
*/
|
|
#define TEE_DESC_PRIVILEGED 0x1
|
|
struct tee_desc {
|
|
const char *name;
|
|
const struct tee_driver_ops *ops;
|
|
struct module *owner;
|
|
u32 flags;
|
|
};
|
|
|
|
/**
|
|
* tee_device_alloc() - Allocate a new struct tee_device instance
|
|
* @teedesc: Descriptor for this driver
|
|
* @dev: Parent device for this device
|
|
* @pool: Shared memory pool, NULL if not used
|
|
* @driver_data: Private driver data for this device
|
|
*
|
|
* Allocates a new struct tee_device instance. The device is
|
|
* removed by tee_device_unregister().
|
|
*
|
|
* @returns a pointer to a 'struct tee_device' or an ERR_PTR on failure
|
|
*/
|
|
struct tee_device *tee_device_alloc(const struct tee_desc *teedesc,
|
|
struct device *dev,
|
|
struct tee_shm_pool *pool,
|
|
void *driver_data);
|
|
|
|
/**
|
|
* tee_device_register() - Registers a TEE device
|
|
* @teedev: Device to register
|
|
*
|
|
* tee_device_unregister() need to be called to remove the @teedev if
|
|
* this function fails.
|
|
*
|
|
* @returns < 0 on failure
|
|
*/
|
|
int tee_device_register(struct tee_device *teedev);
|
|
|
|
/**
|
|
* tee_device_unregister() - Removes a TEE device
|
|
* @teedev: Device to unregister
|
|
*
|
|
* This function should be called to remove the @teedev even if
|
|
* tee_device_register() hasn't been called yet. Does nothing if
|
|
* @teedev is NULL.
|
|
*/
|
|
void tee_device_unregister(struct tee_device *teedev);
|
|
|
|
/**
|
|
* struct tee_shm - shared memory object
|
|
* @ctx: context using the object
|
|
* @paddr: physical address of the shared memory
|
|
* @kaddr: virtual address of the shared memory
|
|
* @size: size of shared memory
|
|
* @offset: offset of buffer in user space
|
|
* @pages: locked pages from userspace
|
|
* @num_pages: number of locked pages
|
|
* @dmabuf: dmabuf used to for exporting to user space
|
|
* @flags: defined by TEE_SHM_* in tee_drv.h
|
|
* @id: unique id of a shared memory object on this device
|
|
*
|
|
* This pool is only supposed to be accessed directly from the TEE
|
|
* subsystem and from drivers that implements their own shm pool manager.
|
|
*/
|
|
struct tee_shm {
|
|
struct tee_context *ctx;
|
|
phys_addr_t paddr;
|
|
void *kaddr;
|
|
size_t size;
|
|
unsigned int offset;
|
|
struct page **pages;
|
|
size_t num_pages;
|
|
struct dma_buf *dmabuf;
|
|
u32 flags;
|
|
int id;
|
|
};
|
|
|
|
/**
|
|
* struct tee_shm_pool_mgr - shared memory manager
|
|
* @ops: operations
|
|
* @private_data: private data for the shared memory manager
|
|
*/
|
|
struct tee_shm_pool_mgr {
|
|
const struct tee_shm_pool_mgr_ops *ops;
|
|
void *private_data;
|
|
};
|
|
|
|
/**
|
|
* struct tee_shm_pool_mgr_ops - shared memory pool manager operations
|
|
* @alloc: called when allocating shared memory
|
|
* @free: called when freeing shared memory
|
|
* @destroy_poolmgr: called when destroying the pool manager
|
|
*/
|
|
struct tee_shm_pool_mgr_ops {
|
|
int (*alloc)(struct tee_shm_pool_mgr *poolmgr, struct tee_shm *shm,
|
|
size_t size);
|
|
void (*free)(struct tee_shm_pool_mgr *poolmgr, struct tee_shm *shm);
|
|
void (*destroy_poolmgr)(struct tee_shm_pool_mgr *poolmgr);
|
|
};
|
|
|
|
/**
|
|
* tee_shm_pool_alloc() - Create a shared memory pool from shm managers
|
|
* @priv_mgr: manager for driver private shared memory allocations
|
|
* @dmabuf_mgr: manager for dma-buf shared memory allocations
|
|
*
|
|
* Allocation with the flag TEE_SHM_DMA_BUF set will use the range supplied
|
|
* in @dmabuf, others will use the range provided by @priv.
|
|
*
|
|
* @returns pointer to a 'struct tee_shm_pool' or an ERR_PTR on failure.
|
|
*/
|
|
struct tee_shm_pool *tee_shm_pool_alloc(struct tee_shm_pool_mgr *priv_mgr,
|
|
struct tee_shm_pool_mgr *dmabuf_mgr);
|
|
|
|
/*
|
|
* tee_shm_pool_mgr_alloc_res_mem() - Create a shm manager for reserved
|
|
* memory
|
|
* @vaddr: Virtual address of start of pool
|
|
* @paddr: Physical address of start of pool
|
|
* @size: Size in bytes of the pool
|
|
*
|
|
* @returns pointer to a 'struct tee_shm_pool_mgr' or an ERR_PTR on failure.
|
|
*/
|
|
struct tee_shm_pool_mgr *tee_shm_pool_mgr_alloc_res_mem(unsigned long vaddr,
|
|
phys_addr_t paddr,
|
|
size_t size,
|
|
int min_alloc_order);
|
|
|
|
/**
|
|
* tee_shm_pool_mgr_destroy() - Free a shared memory manager
|
|
*/
|
|
static inline void tee_shm_pool_mgr_destroy(struct tee_shm_pool_mgr *poolm)
|
|
{
|
|
poolm->ops->destroy_poolmgr(poolm);
|
|
}
|
|
|
|
/**
|
|
* struct tee_shm_pool_mem_info - holds information needed to create a shared
|
|
* memory pool
|
|
* @vaddr: Virtual address of start of pool
|
|
* @paddr: Physical address of start of pool
|
|
* @size: Size in bytes of the pool
|
|
*/
|
|
struct tee_shm_pool_mem_info {
|
|
unsigned long vaddr;
|
|
phys_addr_t paddr;
|
|
size_t size;
|
|
};
|
|
|
|
/**
|
|
* tee_shm_pool_alloc_res_mem() - Create a shared memory pool from reserved
|
|
* memory range
|
|
* @priv_info: Information for driver private shared memory pool
|
|
* @dmabuf_info: Information for dma-buf shared memory pool
|
|
*
|
|
* Start and end of pools will must be page aligned.
|
|
*
|
|
* Allocation with the flag TEE_SHM_DMA_BUF set will use the range supplied
|
|
* in @dmabuf, others will use the range provided by @priv.
|
|
*
|
|
* @returns pointer to a 'struct tee_shm_pool' or an ERR_PTR on failure.
|
|
*/
|
|
struct tee_shm_pool *
|
|
tee_shm_pool_alloc_res_mem(struct tee_shm_pool_mem_info *priv_info,
|
|
struct tee_shm_pool_mem_info *dmabuf_info);
|
|
|
|
/**
|
|
* tee_shm_pool_free() - Free a shared memory pool
|
|
* @pool: The shared memory pool to free
|
|
*
|
|
* The must be no remaining shared memory allocated from this pool when
|
|
* this function is called.
|
|
*/
|
|
void tee_shm_pool_free(struct tee_shm_pool *pool);
|
|
|
|
/**
|
|
* tee_get_drvdata() - Return driver_data pointer
|
|
* @returns the driver_data pointer supplied to tee_register().
|
|
*/
|
|
void *tee_get_drvdata(struct tee_device *teedev);
|
|
|
|
/**
|
|
* tee_shm_alloc() - Allocate shared memory
|
|
* @ctx: Context that allocates the shared memory
|
|
* @size: Requested size of shared memory
|
|
* @flags: Flags setting properties for the requested shared memory.
|
|
*
|
|
* Memory allocated as global shared memory is automatically freed when the
|
|
* TEE file pointer is closed. The @flags field uses the bits defined by
|
|
* TEE_SHM_* above. TEE_SHM_MAPPED must currently always be set. If
|
|
* TEE_SHM_DMA_BUF global shared memory will be allocated and associated
|
|
* with a dma-buf handle, else driver private memory.
|
|
*
|
|
* @returns a pointer to 'struct tee_shm'
|
|
*/
|
|
struct tee_shm *tee_shm_alloc(struct tee_context *ctx, size_t size, u32 flags);
|
|
|
|
/**
|
|
* tee_shm_register() - Register shared memory buffer
|
|
* @ctx: Context that registers the shared memory
|
|
* @addr: Address is userspace of the shared buffer
|
|
* @length: Length of the shared buffer
|
|
* @flags: Flags setting properties for the requested shared memory.
|
|
*
|
|
* @returns a pointer to 'struct tee_shm'
|
|
*/
|
|
struct tee_shm *tee_shm_register(struct tee_context *ctx, unsigned long addr,
|
|
size_t length, u32 flags);
|
|
|
|
/**
|
|
* tee_shm_is_registered() - Check if shared memory object in registered in TEE
|
|
* @shm: Shared memory handle
|
|
* @returns true if object is registered in TEE
|
|
*/
|
|
static inline bool tee_shm_is_registered(struct tee_shm *shm)
|
|
{
|
|
return shm && (shm->flags & TEE_SHM_REGISTER);
|
|
}
|
|
|
|
/**
|
|
* tee_shm_free() - Free shared memory
|
|
* @shm: Handle to shared memory to free
|
|
*/
|
|
void tee_shm_free(struct tee_shm *shm);
|
|
|
|
/**
|
|
* tee_shm_put() - Decrease reference count on a shared memory handle
|
|
* @shm: Shared memory handle
|
|
*/
|
|
void tee_shm_put(struct tee_shm *shm);
|
|
|
|
/**
|
|
* tee_shm_va2pa() - Get physical address of a virtual address
|
|
* @shm: Shared memory handle
|
|
* @va: Virtual address to tranlsate
|
|
* @pa: Returned physical address
|
|
* @returns 0 on success and < 0 on failure
|
|
*/
|
|
int tee_shm_va2pa(struct tee_shm *shm, void *va, phys_addr_t *pa);
|
|
|
|
/**
|
|
* tee_shm_pa2va() - Get virtual address of a physical address
|
|
* @shm: Shared memory handle
|
|
* @pa: Physical address to tranlsate
|
|
* @va: Returned virtual address
|
|
* @returns 0 on success and < 0 on failure
|
|
*/
|
|
int tee_shm_pa2va(struct tee_shm *shm, phys_addr_t pa, void **va);
|
|
|
|
/**
|
|
* tee_shm_get_va() - Get virtual address of a shared memory plus an offset
|
|
* @shm: Shared memory handle
|
|
* @offs: Offset from start of this shared memory
|
|
* @returns virtual address of the shared memory + offs if offs is within
|
|
* the bounds of this shared memory, else an ERR_PTR
|
|
*/
|
|
void *tee_shm_get_va(struct tee_shm *shm, size_t offs);
|
|
|
|
/**
|
|
* tee_shm_get_pa() - Get physical address of a shared memory plus an offset
|
|
* @shm: Shared memory handle
|
|
* @offs: Offset from start of this shared memory
|
|
* @pa: Physical address to return
|
|
* @returns 0 if offs is within the bounds of this shared memory, else an
|
|
* error code.
|
|
*/
|
|
int tee_shm_get_pa(struct tee_shm *shm, size_t offs, phys_addr_t *pa);
|
|
|
|
/**
|
|
* tee_shm_get_size() - Get size of shared memory buffer
|
|
* @shm: Shared memory handle
|
|
* @returns size of shared memory
|
|
*/
|
|
static inline size_t tee_shm_get_size(struct tee_shm *shm)
|
|
{
|
|
return shm->size;
|
|
}
|
|
|
|
/**
|
|
* tee_shm_get_pages() - Get list of pages that hold shared buffer
|
|
* @shm: Shared memory handle
|
|
* @num_pages: Number of pages will be stored there
|
|
* @returns pointer to pages array
|
|
*/
|
|
static inline struct page **tee_shm_get_pages(struct tee_shm *shm,
|
|
size_t *num_pages)
|
|
{
|
|
*num_pages = shm->num_pages;
|
|
return shm->pages;
|
|
}
|
|
|
|
/**
|
|
* tee_shm_get_page_offset() - Get shared buffer offset from page start
|
|
* @shm: Shared memory handle
|
|
* @returns page offset of shared buffer
|
|
*/
|
|
static inline size_t tee_shm_get_page_offset(struct tee_shm *shm)
|
|
{
|
|
return shm->offset;
|
|
}
|
|
|
|
/**
|
|
* tee_shm_get_id() - Get id of a shared memory object
|
|
* @shm: Shared memory handle
|
|
* @returns id
|
|
*/
|
|
static inline int tee_shm_get_id(struct tee_shm *shm)
|
|
{
|
|
return shm->id;
|
|
}
|
|
|
|
/**
|
|
* tee_shm_get_from_id() - Find shared memory object and increase reference
|
|
* count
|
|
* @ctx: Context owning the shared memory
|
|
* @id: Id of shared memory object
|
|
* @returns a pointer to 'struct tee_shm' on success or an ERR_PTR on failure
|
|
*/
|
|
struct tee_shm *tee_shm_get_from_id(struct tee_context *ctx, int id);
|
|
|
|
/**
|
|
* tee_client_open_context() - Open a TEE context
|
|
* @start: if not NULL, continue search after this context
|
|
* @match: function to check TEE device
|
|
* @data: data for match function
|
|
* @vers: if not NULL, version data of TEE device of the context returned
|
|
*
|
|
* This function does an operation similar to open("/dev/teeX") in user space.
|
|
* A returned context must be released with tee_client_close_context().
|
|
*
|
|
* Returns a TEE context of the first TEE device matched by the match()
|
|
* callback or an ERR_PTR.
|
|
*/
|
|
struct tee_context *
|
|
tee_client_open_context(struct tee_context *start,
|
|
int (*match)(struct tee_ioctl_version_data *,
|
|
const void *),
|
|
const void *data, struct tee_ioctl_version_data *vers);
|
|
|
|
/**
|
|
* tee_client_close_context() - Close a TEE context
|
|
* @ctx: TEE context to close
|
|
*
|
|
* Note that all sessions previously opened with this context will be
|
|
* closed when this function is called.
|
|
*/
|
|
void tee_client_close_context(struct tee_context *ctx);
|
|
|
|
/**
|
|
* tee_client_get_version() - Query version of TEE
|
|
* @ctx: TEE context to TEE to query
|
|
* @vers: Pointer to version data
|
|
*/
|
|
void tee_client_get_version(struct tee_context *ctx,
|
|
struct tee_ioctl_version_data *vers);
|
|
|
|
/**
|
|
* tee_client_open_session() - Open a session to a Trusted Application
|
|
* @ctx: TEE context
|
|
* @arg: Open session arguments, see description of
|
|
* struct tee_ioctl_open_session_arg
|
|
* @param: Parameters passed to the Trusted Application
|
|
*
|
|
* Returns < 0 on error else see @arg->ret for result. If @arg->ret
|
|
* is TEEC_SUCCESS the session identifier is available in @arg->session.
|
|
*/
|
|
int tee_client_open_session(struct tee_context *ctx,
|
|
struct tee_ioctl_open_session_arg *arg,
|
|
struct tee_param *param);
|
|
|
|
/**
|
|
* tee_client_close_session() - Close a session to a Trusted Application
|
|
* @ctx: TEE Context
|
|
* @session: Session id
|
|
*
|
|
* Return < 0 on error else 0, regardless the session will not be
|
|
* valid after this function has returned.
|
|
*/
|
|
int tee_client_close_session(struct tee_context *ctx, u32 session);
|
|
|
|
/**
|
|
* tee_client_invoke_func() - Invoke a function in a Trusted Application
|
|
* @ctx: TEE Context
|
|
* @arg: Invoke arguments, see description of
|
|
* struct tee_ioctl_invoke_arg
|
|
* @param: Parameters passed to the Trusted Application
|
|
*
|
|
* Returns < 0 on error else see @arg->ret for result.
|
|
*/
|
|
int tee_client_invoke_func(struct tee_context *ctx,
|
|
struct tee_ioctl_invoke_arg *arg,
|
|
struct tee_param *param);
|
|
|
|
/**
|
|
* tee_client_cancel_req() - Request cancellation of the previous open-session
|
|
* or invoke-command operations in a Trusted Application
|
|
* @ctx: TEE Context
|
|
* @arg: Cancellation arguments, see description of
|
|
* struct tee_ioctl_cancel_arg
|
|
*
|
|
* Returns < 0 on error else 0 if the cancellation was successfully requested.
|
|
*/
|
|
int tee_client_cancel_req(struct tee_context *ctx,
|
|
struct tee_ioctl_cancel_arg *arg);
|
|
|
|
static inline bool tee_param_is_memref(struct tee_param *param)
|
|
{
|
|
switch (param->attr & TEE_IOCTL_PARAM_ATTR_TYPE_MASK) {
|
|
case TEE_IOCTL_PARAM_ATTR_TYPE_MEMREF_INPUT:
|
|
case TEE_IOCTL_PARAM_ATTR_TYPE_MEMREF_OUTPUT:
|
|
case TEE_IOCTL_PARAM_ATTR_TYPE_MEMREF_INOUT:
|
|
return true;
|
|
default:
|
|
return false;
|
|
}
|
|
}
|
|
|
|
extern struct bus_type tee_bus_type;
|
|
|
|
/**
|
|
* struct tee_client_device - tee based device
|
|
* @id: device identifier
|
|
* @dev: device structure
|
|
*/
|
|
struct tee_client_device {
|
|
struct tee_client_device_id id;
|
|
struct device dev;
|
|
};
|
|
|
|
#define to_tee_client_device(d) container_of(d, struct tee_client_device, dev)
|
|
|
|
/**
|
|
* struct tee_client_driver - tee client driver
|
|
* @id_table: device id table supported by this driver
|
|
* @driver: driver structure
|
|
*/
|
|
struct tee_client_driver {
|
|
const struct tee_client_device_id *id_table;
|
|
struct device_driver driver;
|
|
};
|
|
|
|
#define to_tee_client_driver(d) \
|
|
container_of(d, struct tee_client_driver, driver)
|
|
|
|
#endif /*__TEE_DRV_H*/
|