On Tue, 1 Sep 2020 at 06:31, Ralph Campbell <rcampbell@xxxxxxxxxx> wrote:
>
> The user level OpenCL code shouldn't have to align start and end
> addresses to a page boundary. That is better handled in the nouveau
> driver. The npages field is also redundant since it can be computed
> from the start and end addresses.
>
> Signed-off-by: Ralph Campbell <rcampbell@xxxxxxxxxx>
Thanks Ralph,
Queued in my tree.
Ben.
> ---
>
> This is for Ben Skegg's nouveau tree.
>
> I have been working with Karol Herbst on the OpenCL mesa changes for
> nouveau which will be merged upstream soon.
> With or without those changes, the user visible effect of this patch
> only extends the range by one page (round up vs. round down to page
> boundary).
>
> Changes in v2:
> I changed the start/end check to require a size so start has to be less
> than end.
>
> drivers/gpu/drm/nouveau/nouveau_svm.c | 14 +++-----------
> 1 file changed, 3 insertions(+), 11 deletions(-)
>
> diff --git a/drivers/gpu/drm/nouveau/nouveau_svm.c b/drivers/gpu/drm/nouveau/nouveau_svm.c
> index 2df1c0460559..4f69e4c3dafd 100644
> --- a/drivers/gpu/drm/nouveau/nouveau_svm.c
> +++ b/drivers/gpu/drm/nouveau/nouveau_svm.c
> @@ -105,11 +105,11 @@ nouveau_svmm_bind(struct drm_device *dev, void *data,
> struct nouveau_cli *cli = nouveau_cli(file_priv);
> struct drm_nouveau_svm_bind *args = data;
> unsigned target, cmd, priority;
> - unsigned long addr, end, size;
> + unsigned long addr, end;
> struct mm_struct *mm;
>
> args->va_start &= PAGE_MASK;
> - args->va_end &= PAGE_MASK;
> + args->va_end = ALIGN(args->va_end, PAGE_SIZE);
>
> /* Sanity check arguments */
> if (args->reserved0 || args->reserved1)
> @@ -118,8 +118,6 @@ nouveau_svmm_bind(struct drm_device *dev, void *data,
> return -EINVAL;
> if (args->va_start >= args->va_end)
> return -EINVAL;
> - if (!args->npages)
> - return -EINVAL;
>
> cmd = args->header >> NOUVEAU_SVM_BIND_COMMAND_SHIFT;
> cmd &= NOUVEAU_SVM_BIND_COMMAND_MASK;
> @@ -151,12 +149,6 @@ nouveau_svmm_bind(struct drm_device *dev, void *data,
> if (args->stride)
> return -EINVAL;
>
> - size = ((unsigned long)args->npages) << PAGE_SHIFT;
> - if ((args->va_start + size) <= args->va_start)
> - return -EINVAL;
> - if ((args->va_start + size) > args->va_end)
> - return -EINVAL;
> -
> /*
> * Ok we are ask to do something sane, for now we only support migrate
> * commands but we will add things like memory policy (what to do on
> @@ -171,7 +163,7 @@ nouveau_svmm_bind(struct drm_device *dev, void *data,
> return -EINVAL;
> }
>
> - for (addr = args->va_start, end = args->va_start + size; addr < end;) {
> + for (addr = args->va_start, end = args->va_end; addr < end;) {
> struct vm_area_struct *vma;
> unsigned long next;
>
> --
> 2.20.1
>
> _______________________________________________
> Nouveau mailing list
> Nouveau@xxxxxxxxxxxxxxxxxxxxx
> https://lists.freedesktop.org/mailman/listinfo/nouveau
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