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Subject[PATCH 010/115] gpu: ion: Get an sg_table from an ion handle
Date
From: Rebecca Schultz Zavin <rebecca@android.com>

This patch adds an interface to return and sg_table given a
valid ion handle.

Signed-off-by: Rebecca Schultz Zavin <rebecca@android.com>
[jstultz: modified patch to apply to staging directory]
Signed-off-by: John Stultz <john.stultz@linaro.org>
---
drivers/staging/android/ion/ion.c | 8 ++------
drivers/staging/android/ion/ion.h | 13 ++++++++++++-
2 files changed, 14 insertions(+), 7 deletions(-)

diff --git a/drivers/staging/android/ion/ion.c b/drivers/staging/android/ion/ion.c
index b95202b..7ff9983 100644
--- a/drivers/staging/android/ion/ion.c
+++ b/drivers/staging/android/ion/ion.c
@@ -616,8 +616,8 @@ void ion_client_destroy(struct ion_client *client)
kfree(client);
}

-struct sg_table *ion_map_dma(struct ion_client *client,
- struct ion_handle *handle)
+struct sg_table *ion_sg_table(struct ion_client *client,
+ struct ion_handle *handle)
{
struct ion_buffer *buffer;
struct sg_table *table;
@@ -635,10 +635,6 @@ struct sg_table *ion_map_dma(struct ion_client *client,
return table;
}

-void ion_unmap_dma(struct ion_client *client, struct ion_handle *handle)
-{
-}
-
static struct sg_table *ion_map_dma_buf(struct dma_buf_attachment *attachment,
enum dma_data_direction direction)
{
diff --git a/drivers/staging/android/ion/ion.h b/drivers/staging/android/ion/ion.h
index 84ca2a9..28810c8 100644
--- a/drivers/staging/android/ion/ion.h
+++ b/drivers/staging/android/ion/ion.h
@@ -149,7 +149,7 @@ void ion_free(struct ion_client *client, struct ion_handle *handle);
* This function queries the heap for a particular handle to get the
* handle's physical address. It't output is only correct if
* a heap returns physically contiguous memory -- in other cases
- * this api should not be implemented -- ion_map_dma should be used
+ * this api should not be implemented -- ion_sg_table should be used
* instead. Returns -EINVAL if the handle is invalid. This has
* no implications on the reference counting of the handle --
* the returned value may not be valid if the caller is not
@@ -159,6 +159,17 @@ int ion_phys(struct ion_client *client, struct ion_handle *handle,
ion_phys_addr_t *addr, size_t *len);

/**
+ * ion_map_dma - return an sg_table describing a handle
+ * @client: the client
+ * @handle: the handle
+ *
+ * This function returns the sg_table describing
+ * a particular ion handle.
+ */
+struct sg_table *ion_sg_table(struct ion_client *client,
+ struct ion_handle *handle);
+
+/**
* ion_map_kernel - create mapping for the given handle
* @client: the client
* @handle: handle to map
--
1.8.3.2


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