linux-kernel - [PATCH 010/115] gpu: ion: Get an sg

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Date:	Fri, 13 Dec 2013 14:23:44 -0800
From:	John Stultz <john.stultz@...aro.org>
To:	LKML <linux-kernel@...r.kernel.org>
Cc:	Greg KH <gregkh@...uxfoundation.org>,
	Android Kernel Team <kernel-team@...roid.com>,
	Sumit Semwal <sumit.semwal@...aro.org>,
	Jesse Barker <jesse.barker@....com>,
	Colin Cross <ccross@...roid.com>,
	Rebecca Schultz Zavin <rebecca@...roid.com>,
	John Stultz <john.stultz@...aro.org>
Subject: [PATCH 010/115] gpu: ion: Get an sg_table from an ion handle

From: Rebecca Schultz Zavin <rebecca@...roid.com>

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

Signed-off-by: Rebecca Schultz Zavin <rebecca@...roid.com>
[jstultz: modified patch to apply to staging directory]
Signed-off-by: John Stultz <john.stultz@...aro.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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