Re: [PATCH 3/4] dma-buf: add support for mapping with dma mapping attributes

On Tue, 22 Jan 2019, Andrew F. Davis wrote: > On 1/21/19 4:12 PM, Liam Mark wrote: > > On Mon, 21 Jan 2019, Christoph Hellwig wrote: > > > >> On Mon, Jan 21, 2019 at 11:44:10AM -0800, Liam Mark wrote: > >>> The main use case is for allowing clients to pass in > >>> DMA_ATTR_SKIP_CPU_SYNC in

Re: [PATCH 3/4] dma-buf: add support for mapping with dma mapping attributes

On Tue, 22 Jan 2019, Andrew F. Davis wrote: > On 1/21/19 4:18 PM, Liam Mark wrote: > > On Mon, 21 Jan 2019, Andrew F. Davis wrote: > > > >> On 1/21/19 2:20 PM, Liam Mark wrote: > >>> On Mon, 21 Jan 2019, Andrew F. Davis wrote: > >>> > On 1/21/19 1:44 PM, Liam Mark wrote: > > On Mon, 21

Re: [PATCH 3/4] dma-buf: add support for mapping with dma mapping attributes

On 1/21/19 4:12 PM, Liam Mark wrote: > On Mon, 21 Jan 2019, Christoph Hellwig wrote: > >> On Mon, Jan 21, 2019 at 11:44:10AM -0800, Liam Mark wrote: >>> The main use case is for allowing clients to pass in >>> DMA_ATTR_SKIP_CPU_SYNC in order to skip the default cache maintenance >>> which

Re: [PATCH 3/4] dma-buf: add support for mapping with dma mapping attributes

On 1/21/19 4:18 PM, Liam Mark wrote: > On Mon, 21 Jan 2019, Andrew F. Davis wrote: > >> On 1/21/19 2:20 PM, Liam Mark wrote: >>> On Mon, 21 Jan 2019, Andrew F. Davis wrote: >>> On 1/21/19 1:44 PM, Liam Mark wrote: > On Mon, 21 Jan 2019, Christoph Hellwig wrote: > >> On Sat, Jan

Re: [PATCH 3/4] dma-buf: add support for mapping with dma mapping attributes

On Mon, 21 Jan 2019, Andrew F. Davis wrote: > On 1/21/19 2:20 PM, Liam Mark wrote: > > On Mon, 21 Jan 2019, Andrew F. Davis wrote: > > > >> On 1/21/19 1:44 PM, Liam Mark wrote: > >>> On Mon, 21 Jan 2019, Christoph Hellwig wrote: > >>> > On Sat, Jan 19, 2019 at 08:50:41AM -0800, Laura Abbott

Re: [PATCH 3/4] dma-buf: add support for mapping with dma mapping attributes

On Mon, 21 Jan 2019, Christoph Hellwig wrote: > On Mon, Jan 21, 2019 at 11:44:10AM -0800, Liam Mark wrote: > > The main use case is for allowing clients to pass in > > DMA_ATTR_SKIP_CPU_SYNC in order to skip the default cache maintenance > > which happens in dma_buf_map_attachment and

Re: [PATCH 3/4] dma-buf: add support for mapping with dma mapping attributes

On Mon, 21 Jan 2019, Andrew F. Davis wrote: > On 1/21/19 1:44 PM, Liam Mark wrote: > > On Mon, 21 Jan 2019, Christoph Hellwig wrote: > > > >> On Sat, Jan 19, 2019 at 08:50:41AM -0800, Laura Abbott wrote: > And who is going to decide which ones to pass? And who documents > which ones

Re: [PATCH 3/4] dma-buf: add support for mapping with dma mapping attributes

On Mon, 21 Jan 2019, Christoph Hellwig wrote: > On Sat, Jan 19, 2019 at 08:50:41AM -0800, Laura Abbott wrote: > > > And who is going to decide which ones to pass? And who documents > > > which ones are safe? > > > > > > I'd much rather have explicit, well documented dma-buf flags that > > >

Re: [PATCH 3/4] dma-buf: add support for mapping with dma mapping attributes

On Mon, 21 Jan 2019, Christoph Hellwig wrote: > On Mon, Jan 21, 2019 at 12:20:42PM -0800, Liam Mark wrote: > > I have left this to clients, but if they own the buffer they can have the > > knowledge as to whether CPU access is needed in that use case (example for > > post-processing). > > That

Re: [PATCH 3/4] dma-buf: add support for mapping with dma mapping attributes

On 1/21/19 2:20 PM, Liam Mark wrote: > On Mon, 21 Jan 2019, Andrew F. Davis wrote: > >> On 1/21/19 1:44 PM, Liam Mark wrote: >>> On Mon, 21 Jan 2019, Christoph Hellwig wrote: >>> On Sat, Jan 19, 2019 at 08:50:41AM -0800, Laura Abbott wrote: >> And who is going to decide which ones to

Re: [PATCH 3/4] dma-buf: add support for mapping with dma mapping attributes

On 1/21/19 1:44 PM, Liam Mark wrote: > On Mon, 21 Jan 2019, Christoph Hellwig wrote: > >> On Sat, Jan 19, 2019 at 08:50:41AM -0800, Laura Abbott wrote: And who is going to decide which ones to pass? And who documents which ones are safe? I'd much rather have explicit, well

Re: [PATCH 3/4] dma-buf: add support for mapping with dma mapping attributes

On Fri, 18 Jan 2019, Laura Abbott wrote: > On 1/18/19 10:37 AM, Liam Mark wrote: > > Add support for configuring dma mapping attributes when mapping > > and unmapping memory through dma_buf_map_attachment and > > dma_buf_unmap_attachment. > > > > Signed-off-by: Liam Mark > > --- > >

[PATCH 3/4] dma-buf: add support for mapping with dma mapping attributes

Add support for configuring dma mapping attributes when mapping and unmapping memory through dma_buf_map_attachment and dma_buf_unmap_attachment. Signed-off-by: Liam Mark --- include/linux/dma-buf.h | 3 +++ 1 file changed, 3 insertions(+) diff --git a/include/linux/dma-buf.h

Re: [PATCH 3/4] dma-buf: add support for mapping with dma mapping attributes

On 1/19/19 2:25 AM, Christoph Hellwig wrote: On Fri, Jan 18, 2019 at 10:37:46AM -0800, Liam Mark wrote: Add support for configuring dma mapping attributes when mapping and unmapping memory through dma_buf_map_attachment and dma_buf_unmap_attachment. Signed-off-by: Liam Mark And who is going

Re: [PATCH 3/4] dma-buf: add support for mapping with dma mapping attributes

On 1/18/19 1:32 PM, Liam Mark wrote: On Fri, 18 Jan 2019, Laura Abbott wrote: On 1/18/19 10:37 AM, Liam Mark wrote: Add support for configuring dma mapping attributes when mapping and unmapping memory through dma_buf_map_attachment and dma_buf_unmap_attachment. Signed-off-by: Liam Mark ---

Re: [PATCH 3/4] dma-buf: add support for mapping with dma mapping attributes

On 1/18/19 10:37 AM, Liam Mark wrote: Add support for configuring dma mapping attributes when mapping and unmapping memory through dma_buf_map_attachment and dma_buf_unmap_attachment. Signed-off-by: Liam Mark --- include/linux/dma-buf.h | 3 +++ 1 file changed, 3 insertions(+) diff --git