Hello Robin,
On 2015-02-06 15:55, Robin Murphy wrote:
Taking some inspiration from the arch/arm code, implement the
arch-specific side of the DMA mapping ops using the new IOMMU-DMA layer.
Signed-off-by: Robin Murphy
---
arch/arm64/include/asm/device.h | 3 +
arch/arm64/include/asm/d
On 09/03/15 20:09, Robin Murphy wrote:
[...]
I think ideally you'd call dma_map_page when you first create the page
table, dma_sync_single_for_device on any update, and dma_unmap_page when you
tear it down, and you'd also use the appropriate DMA addresses everywhere
instead of physical addresses.
Hi Russell,
On 09/03/15 17:59, Russell King - ARM Linux wrote:
[...]
For a noncoherent device, dma_map_single() will end up calling
__dma_map_area() with the page offset and size of the original request, so
the updated part gets flushed by VA, and the rest of the page isn't touched
if it doesn'
On Thu, Mar 05, 2015 at 11:16:28AM +, Robin Murphy wrote:
> Hi Laura,
>
> On 05/03/15 00:19, Laura Abbott wrote:
> [...]
> >>Consider that the IOMMU's page table walker is a DMA master in its own
> >right, and that is the device you're mapping the page tables for.
> >Therefore your IOMMU drive
Hi Laura,
On 05/03/15 00:19, Laura Abbott wrote:
[...]
Consider that the IOMMU's page table walker is a DMA master in its own
right, and that is the device you're mapping the page tables for.
Therefore your IOMMU driver needs to have access to the struct device
of the IOMMU itself to use for th
On 3/3/2015 4:15 AM, Robin Murphy wrote:
On 03/03/15 03:38, Yong Wu wrote:
On Mon, 2015-02-16 at 20:04 +, Robin Murphy wrote:
2)int (*domain_init)(struct iommu_domain *domain);
About this function, it will alloc pagetable for the iommu
domain. And We expect the pagetable me
On 03/03/15 03:38, Yong Wu wrote:
On Mon, 2015-02-16 at 20:04 +, Robin Murphy wrote:
2)int (*domain_init)(struct iommu_domain *domain);
About this function, it will alloc pagetable for the iommu
domain. And We expect the pagetable memory is uncacheable, so try to
call "dma_a
On Mon, 2015-02-16 at 20:04 +, Robin Murphy wrote:
> > 2)int (*domain_init)(struct iommu_domain *domain);
> > About this function, it will alloc pagetable for the iommu
> > domain. And We expect the pagetable memory is uncacheable, so try to
> > call "dma_alloc_coherent", unfortu
On 14/02/15 08:03, Yong Wu wrote:
On Tue, 2015-02-10 at 12:07 +, Robin Murphy wrote:
On 10/02/15 04:39, Yingjoe Chen wrote:
On Fri, 2015-02-06 at 14:55 +, Robin Murphy wrote
<...>
diff --git a/arch/arm64/include/asm/dma-mapping.h
b/arch/arm64/include/asm/dma-mapping.h
index 6932bb5..c
On Tue, 2015-02-10 at 12:07 +, Robin Murphy wrote:
> On 10/02/15 04:39, Yingjoe Chen wrote:
> > On Fri, 2015-02-06 at 14:55 +, Robin Murphy wrote
> > <...>
> >> diff --git a/arch/arm64/include/asm/dma-mapping.h
> >> b/arch/arm64/include/asm/dma-mapping.h
> >> index 6932bb5..c1b271f 100644
On 09/02/15 06:02, Will Deacon wrote:
On Fri, Feb 06, 2015 at 02:55:14PM +, Robin Murphy wrote:
Taking some inspiration from the arch/arm code, implement the
arch-specific side of the DMA mapping ops using the new IOMMU-DMA layer.
Is anybody looking at porting arch/arm/ over to this?
If
On 10/02/15 04:39, Yingjoe Chen wrote:
On Fri, 2015-02-06 at 14:55 +, Robin Murphy wrote
<...>
diff --git a/arch/arm64/include/asm/dma-mapping.h
b/arch/arm64/include/asm/dma-mapping.h
index 6932bb5..c1b271f 100644
--- a/arch/arm64/include/asm/dma-mapping.h
+++ b/arch/arm64/include/asm/dma-m
On Fri, 2015-02-06 at 14:55 +, Robin Murphy wrote
<...>
> diff --git a/arch/arm64/include/asm/dma-mapping.h
> b/arch/arm64/include/asm/dma-mapping.h
> index 6932bb5..c1b271f 100644
> --- a/arch/arm64/include/asm/dma-mapping.h
> +++ b/arch/arm64/include/asm/dma-mapping.h
> @@ -62,13 +62,30 @@ s
On Fri, Feb 06, 2015 at 02:55:14PM +, Robin Murphy wrote:
> Taking some inspiration from the arch/arm code, implement the
> arch-specific side of the DMA mapping ops using the new IOMMU-DMA layer.
Is anybody looking at porting arch/arm/ over to this?
> Signed-off-by: Robin Murphy
> ---
> ar
Taking some inspiration from the arch/arm code, implement the
arch-specific side of the DMA mapping ops using the new IOMMU-DMA layer.
Signed-off-by: Robin Murphy
---
arch/arm64/include/asm/device.h | 3 +
arch/arm64/include/asm/dma-mapping.h | 17 ++
arch/arm64/mm/dma-mapping.c
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