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gpu: ion: Get an sg_table from an ion handle

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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>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
This commit is contained in:
Rebecca Schultz Zavin 2013-12-13 14:23:44 -08:00 committed by Greg Kroah-Hartman
parent 29ae6bc712
commit ce1f147a2e
2 changed files with 14 additions and 7 deletions
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8
drivers/staging/android/ion/ion.c
View File

@ -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)
{

13
drivers/staging/android/ion/ion.h
View File

@ -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
@ -158,6 +158,17 @@ void ion_free(struct ion_client *client, struct ion_handle *handle);
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