[RESEND PATCH v2 04/14] tee: shm: add page accessor functions

From: Volodymyr Babchuk
Date: Wed Nov 29 2017 - 07:49:25 EST


From: Volodymyr Babchuk <vlad.babchuk@xxxxxxxxx>

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

Signed-off-by: Volodymyr Babchuk <vlad.babchuk@xxxxxxxxx>
---
include/linux/tee_drv.h | 13 +++++++++++++
1 file changed, 13 insertions(+)

diff --git a/include/linux/tee_drv.h b/include/linux/tee_drv.h
index 0d7f2a5..5489c38 100644
--- a/include/linux/tee_drv.h
+++ b/include/linux/tee_drv.h
@@ -394,6 +394,19 @@ static inline size_t tee_shm_get_size(struct tee_shm *shm)
}

/**
+ * 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
--
2.7.4