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nouveau: find the smallest page allocation to cover a buffer alloc.

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commit e9ba37d9f9a6872b069dd893bd86a7d77ba8c153 upstream.

With the new uapi we don't have the comp flags on the allocation,
so we shouldn't be using the first size that works, we should be
iterating until we get the correct one.

This reduces allocations from 2MB to 64k in lots of places.

Fixes dEQP-VK.memory.allocation.basic.size_8KiB.forward.count_4000
on my ampere/gsp system.

Cc: stable@vger.kernel.org # v6.6
Signed-off-by: Dave Airlie <airlied@redhat.com>
Reviewed-by: Faith Ekstrand <faith.ekstrand@collabora.com>
Signed-off-by: Danilo Krummrich <dakr@redhat.com>
Link: https://patchwork.freedesktop.org/patch/msgid/20230811031520.248341-1-airlied@gmail.com
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
This commit is contained in:
Dave Airlie
2023-08-11 13:15:20 +10:00
committed by Greg Kroah-Hartman
parent 09f7520048
commit 59ae50ebf0
1 changed files with 3 additions and 2 deletions
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5
drivers/gpu/drm/nouveau/nouveau_bo.c
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@@ -318,8 +318,9 @@ nouveau_bo_alloc(struct nouveau_cli *cli, u64 *size, int *align, u32 domain,
(!vmm->page[i].host || vmm->page[i].shift > PAGE_SHIFT))
continue;
if (pi < 0)
pi = i;
/* pick the last one as it will be smallest. */
pi = i;
/* Stop once the buffer is larger than the current page size. */
if (*size >= 1ULL << vmm->page[i].shift)
break;