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BACKPORT: tee: shm: add page accessor functions

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In order to register a shared buffer in TEE, we need accessor
function that return list of pages for that buffer.

Change-Id: I4078da3e7fff7e44bb6478e297250458d66dd89d
Signed-off-by: Volodymyr Babchuk <vlad.babchuk@gmail.com>
Signed-off-by: Jens Wiklander <jens.wiklander@linaro.org>
(cherry picked from commit e0c69ae8bf)
Signed-off-by: Victor Chong <victor.chong@linaro.org>
This commit is contained in:
Volodymyr Babchuk
2017-11-29 14:48:28 +02:00
committed by Amit Pundir
parent 875096695d
commit 345ccf320e
1 changed files with 13 additions and 0 deletions
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13
include/linux/tee_drv.h
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@@ -403,6 +403,19 @@ 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