* [PATCH] drm/amdgpu: fix 64bit division
@ 2017-04-05 9:39 Christian König
[not found] ` <1491385157-16175-1-git-send-email-deathsimple-ANTagKRnAhcb1SvskN2V4Q@public.gmane.org>
0 siblings, 1 reply; 2+ messages in thread
From: Christian König @ 2017-04-05 9:39 UTC (permalink / raw)
To: amd-gfx-PD4FTy7X32lNgt0PjOBp9y5qC8QIuHrW
From: Christian König <christian.koenig@amd.com>
Added with "handle CPU access for split VRAM buffers".
Signed-off-by: Christian König <christian.koenig@amd.com>
---
drivers/gpu/drm/amd/amdgpu/amdgpu_ttm.c | 4 ++--
1 file changed, 2 insertions(+), 2 deletions(-)
diff --git a/drivers/gpu/drm/amd/amdgpu/amdgpu_ttm.c b/drivers/gpu/drm/amd/amdgpu/amdgpu_ttm.c
index 10b793a..c91f13b 100644
--- a/drivers/gpu/drm/amd/amdgpu/amdgpu_ttm.c
+++ b/drivers/gpu/drm/amd/amdgpu/amdgpu_ttm.c
@@ -551,9 +551,9 @@ static unsigned long amdgpu_ttm_io_mem_pfn(struct ttm_buffer_object *bo,
{
struct drm_mm_node *mm = bo->mem.mm_node;
uint64_t size = mm->size;
+ unsigned long offset = page_offset;
- mm += page_offset / size;
- page_offset %= size;
+ page_offset = do_div(offset, size);
return (bo->mem.bus.base >> PAGE_SHIFT) + mm->start + page_offset;
}
--
2.5.0
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amd-gfx@lists.freedesktop.org
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^ permalink raw reply related [flat|nested] 2+ messages in thread
* Re: [PATCH] drm/amdgpu: fix 64bit division
[not found] ` <1491385157-16175-1-git-send-email-deathsimple-ANTagKRnAhcb1SvskN2V4Q@public.gmane.org>
@ 2017-04-05 12:50 ` Alex Deucher
0 siblings, 0 replies; 2+ messages in thread
From: Alex Deucher @ 2017-04-05 12:50 UTC (permalink / raw)
To: Christian König; +Cc: amd-gfx list
On Wed, Apr 5, 2017 at 5:39 AM, Christian König <deathsimple@vodafone.de> wrote:
> From: Christian König <christian.koenig@amd.com>
>
> Added with "handle CPU access for split VRAM buffers".
>
> Signed-off-by: Christian König <christian.koenig@amd.com>
Reviewed-by: Alex Deucher <alexander.deucher@amd.com>
> ---
> drivers/gpu/drm/amd/amdgpu/amdgpu_ttm.c | 4 ++--
> 1 file changed, 2 insertions(+), 2 deletions(-)
>
> diff --git a/drivers/gpu/drm/amd/amdgpu/amdgpu_ttm.c b/drivers/gpu/drm/amd/amdgpu/amdgpu_ttm.c
> index 10b793a..c91f13b 100644
> --- a/drivers/gpu/drm/amd/amdgpu/amdgpu_ttm.c
> +++ b/drivers/gpu/drm/amd/amdgpu/amdgpu_ttm.c
> @@ -551,9 +551,9 @@ static unsigned long amdgpu_ttm_io_mem_pfn(struct ttm_buffer_object *bo,
> {
> struct drm_mm_node *mm = bo->mem.mm_node;
> uint64_t size = mm->size;
> + unsigned long offset = page_offset;
>
> - mm += page_offset / size;
> - page_offset %= size;
> + page_offset = do_div(offset, size);
> return (bo->mem.bus.base >> PAGE_SHIFT) + mm->start + page_offset;
> }
>
> --
> 2.5.0
>
> _______________________________________________
> amd-gfx mailing list
> amd-gfx@lists.freedesktop.org
> https://lists.freedesktop.org/mailman/listinfo/amd-gfx
_______________________________________________
amd-gfx mailing list
amd-gfx@lists.freedesktop.org
https://lists.freedesktop.org/mailman/listinfo/amd-gfx
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2017-04-05 9:39 [PATCH] drm/amdgpu: fix 64bit division Christian König
[not found] ` <1491385157-16175-1-git-send-email-deathsimple-ANTagKRnAhcb1SvskN2V4Q@public.gmane.org>
2017-04-05 12:50 ` Alex Deucher
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