linux-kernel - [PATCH v1 03/14] tee: shm: add accessors for buffer size and page offset

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Date:   Fri, 13 Oct 2017 22:32:33 +0300
From:   Volodymyr Babchuk <volodymyr_babchuk@...m.com>
To:     linux-kernel@...r.kernel.org, linux-arm-kernel@...ts.infradead.org,
        tee-dev@...ts.linaro.org,
        Jens Wiklander <jens.wiklander@...aro.org>
Cc:     Volodymyr Babchuk <vlad.babchuk@...il.com>,
        volodymyr_babchuk@...m.com
Subject: [PATCH v1 03/14] tee: shm: add accessors for buffer size and page offset

From: Volodymyr Babchuk <vlad.babchuk@...il.com>

These two function will be needed for shared memory registration in OP-TEE

Signed-off-by: Volodymyr Babchuk <vlad.babchuk@...il.com>
---
 include/linux/tee_drv.h | 20 ++++++++++++++++++++
 1 file changed, 20 insertions(+)

diff --git a/include/linux/tee_drv.h b/include/linux/tee_drv.h
index 70b9c73..0d7f2a5 100644
--- a/include/linux/tee_drv.h
+++ b/include/linux/tee_drv.h
@@ -384,6 +384,26 @@ void *tee_shm_get_va(struct tee_shm *shm, size_t offs);
 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_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
-- 
2.7.4