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| author |   Alyssa Rosenzweig <alyssa.rosenzweig@collabora.com> | 2021-08-24 13:30:27 -0400 |
|---|---|---|
| committer |   Steven Price <steven.price@arm.com> | 2021-08-25 15:40:19 +0100 |
| commit | bd7ffbc3ca12629aeb66fb9e28cf42b7f37e3e3b (patch) | |
| tree | 8c9b9d98b29efb37abdd40f1f2f916ac9096221c /drivers/gpu/drm/panfrost/panfrost_mmu.c | |
| parent | drm/panfrost: Use u64 for size in lock_region (diff) | |
| download | linux-dev-bd7ffbc3ca12629aeb66fb9e28cf42b7f37e3e3b.tar.xz linux-dev-bd7ffbc3ca12629aeb66fb9e28cf42b7f37e3e3b.zip | |
drm/panfrost: Clamp lock region to Bifrost minimum
When locking a region, we currently clamp to a PAGE_SIZE as the minimum
lock region. While this is valid for Midgard, it is invalid for Bifrost,
where the minimum locking size is 8x larger than the 4k page size. Add a
hardware definition for the minimum lock region size (corresponding to
KBASE_LOCK_REGION_MIN_SIZE_LOG2 in kbase) and respect it.
Signed-off-by: Alyssa Rosenzweig <alyssa.rosenzweig@collabora.com>
Tested-by: Chris Morgan <macromorgan@hotmail.com>
Reviewed-by: Steven Price <steven.price@arm.com>
Reviewed-by: Rob Herring <robh@kernel.org>
Cc: <stable@vger.kernel.org>
Signed-off-by: Steven Price <steven.price@arm.com>
Link: https://patchwork.freedesktop.org/patch/msgid/20210824173028.7528-4-alyssa.rosenzweig@collabora.com
Diffstat (limited to 'drivers/gpu/drm/panfrost/panfrost_mmu.c')
| -rw-r--r-- | drivers/gpu/drm/panfrost/panfrost_mmu.c | 2 |
1 files changed, 1 insertions, 1 deletions
diff --git a/drivers/gpu/drm/panfrost/panfrost_mmu.c b/drivers/gpu/drm/panfrost/panfrost_mmu.c index 3a795273e505..dfe5f1d29763 100644 --- a/drivers/gpu/drm/panfrost/panfrost_mmu.c +++ b/drivers/gpu/drm/panfrost/panfrost_mmu.c @@ -66,7 +66,7 @@ static void lock_region(struct panfrost_device *pfdev, u32 as_nr, /* The size is encoded as ceil(log2) minus(1), which may be calculated * with fls. The size must be clamped to hardware bounds. */ - size = max_t(u64, size, PAGE_SIZE); + size = max_t(u64, size, AS_LOCK_REGION_MIN_SIZE); region_width = fls64(size - 1) - 1; region |= region_width; |