[PATCH v2] drm/msm/iommu: optimize map/unmap
Sai Prakash Ranjan
quic_saipraka at quicinc.com
Tue Aug 23 16:53:06 UTC 2022
On 8/23/2022 10:07 PM, Rob Clark wrote:
> From: Rob Clark <robdclark at chromium.org>
>
> Using map_pages/unmap_pages cuts down on the # of pgtable walks needed
> in the process of finding where to insert/remove an entry. The end
> result is ~5-10x faster than mapping a single page at a time.
>
> v2: Rename iommu_pgsize(), drop obsolete comments, fix error handling
> in msm_iommu_pagetable_map()
>
> Signed-off-by: Rob Clark <robdclark at chromium.org>
> ---
> drivers/gpu/drm/msm/msm_iommu.c | 101 +++++++++++++++++++++++++++-----
> 1 file changed, 86 insertions(+), 15 deletions(-)
Reviewed-by: Sai Prakash Ranjan <quic_saipraka at quicinc.com>
Thanks,
Sai
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