These patches makes the vmwgfx driver use the DMA API to obtain valid
device addresses rather than blindly using physical addresses.
The main motivation is to be able to use a virtual IOMMU in the future.
Other TTM drivers typically map pages one by one rather than using a
scatter-gather list,
The code handles three different cases:
1) physical page addresses. The ttm page array is used.
2) DMA subsystem addresses. A scatter-gather list is used.
3) Coherent pages. The ttm dma pool is used, together with the dma_ttm
array os dma_addr_t
Signed-off-by: Thomas Hellstrom
Used by the vmwgfx driver
Signed-off-by: Thomas Hellstrom thellst...@vmware.com
Reviewed-by: Jakob Bornecrantz ja...@vmware.com
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drivers/gpu/drm/ttm/Makefile |6 +-
drivers/gpu/drm/ttm/ttm_page_alloc_dma.c |3 +++
include/drm/ttm/ttm_page_alloc.h | 11
On Mon, Nov 04, 2013 at 05:57:39AM -0800, Thomas Hellstrom wrote:
The code handles three different cases:
1) physical page addresses. The ttm page array is used.
2) DMA subsystem addresses. A scatter-gather list is used.
3) Coherent pages. The ttm dma pool is used, together with the dma_ttm
On 11/04/2013 05:27 PM, Daniel Vetter wrote:
On Mon, Nov 04, 2013 at 05:57:39AM -0800, Thomas Hellstrom wrote:
The code handles three different cases:
1) physical page addresses. The ttm page array is used.
2) DMA subsystem addresses. A scatter-gather list is used.
3) Coherent pages. The ttm
On 11/04/2013 05:30 PM, Konrad Rzeszutek Wilk wrote:
On Mon, Nov 04, 2013 at 05:57:37AM -0800, Thomas Hellstrom wrote:
These patches makes the vmwgfx driver use the DMA API to obtain valid
device addresses rather than blindly using physical addresses.
The main motivation is to be able to use
On 11/04/2013 05:34 PM, Konrad Rzeszutek Wilk wrote:
On Mon, Nov 04, 2013 at 05:57:38AM -0800, Thomas Hellstrom wrote:
Used by the vmwgfx driver
That looks OK to me. And baremetal should not be
affected as the Intel VT-d driver turns of the SWIOTLB
driver - so it will still use the classic
On 11/04/2013 05:40 PM, Konrad Rzeszutek Wilk wrote:
On Mon, Nov 04, 2013 at 05:57:39AM -0800, Thomas Hellstrom wrote:
The code handles three different cases:
1) physical page addresses. The ttm page array is used.
2) DMA subsystem addresses. A scatter-gather list is used.
3) Coherent pages.
On 10/31/2013 04:13 PM, Keith Packard wrote:
Instead of assuming that the size will be height * pitch, have the caller pass
in the size explicitly.
Signed-off-by: Keith Packard kei...@keithp.com
One nit below. With that changed,
Reviewed-by: Ian Romanick ian.d.roman...@intel.com
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