From 73b7e48a87c79fd6df40aeafcd3994287e31e25f Mon Sep 17 00:00:00 2001 From: Rob Clark Date: Wed, 22 Oct 2025 15:20:51 -0700 Subject: drm/msm: Reject MAP_NULL op if no PRR We need PRR support in order to implement MAP_NULL. Userspace shouldn't be trying to use this if it is unsupported. Reported-by: Valentine Burley Link: https://gitlab.freedesktop.org/mesa/mesa/-/merge_requests/37935#note_3153730 Signed-off-by: Rob Clark Tested-by: Valentine Burley Patchwork: https://patchwork.freedesktop.org/patch/682941/ Message-ID: <20251022222051.10030-1-robin.clark@oss.qualcomm.com> --- drivers/gpu/drm/msm/msm_gpu.h | 11 +++++++++++ 1 file changed, 11 insertions(+) (limited to 'drivers/gpu/drm/msm/msm_gpu.h') diff --git a/drivers/gpu/drm/msm/msm_gpu.h b/drivers/gpu/drm/msm/msm_gpu.h index a597f2bee30b..2894fc118485 100644 --- a/drivers/gpu/drm/msm/msm_gpu.h +++ b/drivers/gpu/drm/msm/msm_gpu.h @@ -299,6 +299,17 @@ static inline struct msm_gpu *dev_to_gpu(struct device *dev) return container_of(adreno_smmu, struct msm_gpu, adreno_smmu); } +static inline bool +adreno_smmu_has_prr(struct msm_gpu *gpu) +{ + struct adreno_smmu_priv *adreno_smmu = dev_get_drvdata(&gpu->pdev->dev); + + if (!adreno_smmu) + return false; + + return adreno_smmu && adreno_smmu->set_prr_addr; +} + /* It turns out that all targets use the same ringbuffer size */ #define MSM_GPU_RINGBUFFER_SZ SZ_32K #define MSM_GPU_RINGBUFFER_BLKSIZE 32 -- cgit v1.2.3