xiaomi-sm8450/android_kernel_xiaomi_sm8450
1
0
Fork 0
Code Issues Pull Requests Actions Packages Projects Releases Wiki Activity

tee: flexible shared memory pool creation

Browse Source 
Makes creation of shm pools more flexible by adding new more primitive
functions to allocate a shm pool. This makes it easier to add driver
specific shm pool management.

Signed-off-by: Jens Wiklander <jens.wiklander@linaro.org>
Signed-off-by: Volodymyr Babchuk <vlad.babchuk@gmail.com>
This commit is contained in:
Jens Wiklander
2017-11-29 14:48:25 +02:00
parent 50c4c4e268
commit e2aca5d892
4 changed files with 200 additions and 123 deletions
Download Patch File Download Diff File Expand all files Collapse all files

57
drivers/tee/tee_private.h
View File

@@ -21,68 +21,15 @@
#include <linux/mutex.h>
#include <linux/types.h>
struct tee_device;
/**
* struct tee_shm - shared memory object
* @teedev: device used to allocate the object
* @ctx: context using the object, if NULL the context is gone
* @link link element
* @paddr: physical address of the shared memory
* @kaddr: virtual address of the shared memory
* @size: size of shared memory
* @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
*/
struct tee_shm {
struct tee_device *teedev;
struct tee_context *ctx;
struct list_head link;
phys_addr_t paddr;
void *kaddr;
size_t size;
struct dma_buf *dmabuf;
u32 flags;
int id;
};
struct tee_shm_pool_mgr;
/**
* struct tee_shm_pool_mgr_ops - shared memory pool manager operations
* @alloc: called when allocating shared memory
* @free: called when freeing shared memory
*/
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);
};
/**
* 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 - shared memory pool
* @private_mgr: pool manager for shared memory only between kernel
* and secure world
* @dma_buf_mgr: pool manager for shared memory exported to user space
* @destroy: called when destroying the pool
* @private_data: private data for the pool
*/
struct tee_shm_pool {
struct tee_shm_pool_mgr private_mgr;
struct tee_shm_pool_mgr dma_buf_mgr;
void (*destroy)(struct tee_shm_pool *pool);
void *private_data;
struct tee_shm_pool_mgr *private_mgr;
struct tee_shm_pool_mgr *dma_buf_mgr;
};
#define TEE_DEVICE_FLAG_REGISTERED 0x1