diff options
| author | Rob Clark <robdclark@chromium.org> | 2021-06-10 14:44:13 -0700 |
|---|---|---|
| committer | Rob Clark <robdclark@chromium.org> | 2021-06-23 07:33:55 -0700 |
| commit | e25e92e08e32c6bf63a968929d232f13dcf9938c (patch) | |
| tree | fbe3898e124d71c6d4e5351cfd490a2e96b550b8 /drivers/gpu/drm/msm/msm_iommu.c | |
| parent | ba6014a4e480c3c2b169438c47273a113c35ba4e (diff) | |
drm/msm: devcoredump iommu fault support
Wire up support to stall the SMMU on iova fault, and collect a devcore-
dump snapshot for easier debugging of faults.
Currently this is a6xx-only, but mostly only because so far it is the
only one using adreno-smmu-priv.
Signed-off-by: Rob Clark <robdclark@chromium.org>
Acked-by: Jordan Crouse <jordan@cosmicpenguin.net>
Link: https://lore.kernel.org/r/20210610214431.539029-6-robdclark@gmail.com
Signed-off-by: Rob Clark <robdclark@chromium.org>
Diffstat (limited to 'drivers/gpu/drm/msm/msm_iommu.c')
| -rw-r--r-- | drivers/gpu/drm/msm/msm_iommu.c | 11 |
1 files changed, 11 insertions, 0 deletions
diff --git a/drivers/gpu/drm/msm/msm_iommu.c b/drivers/gpu/drm/msm/msm_iommu.c index 6975b95c3c29..eed2a762e9dd 100644 --- a/drivers/gpu/drm/msm/msm_iommu.c +++ b/drivers/gpu/drm/msm/msm_iommu.c @@ -184,6 +184,9 @@ struct msm_mmu *msm_iommu_pagetable_create(struct msm_mmu *parent) * the arm-smmu driver as a trigger to set up TTBR0 */ if (atomic_inc_return(&iommu->pagetables) == 1) { + /* Enable stall on iommu fault: */ + adreno_smmu->set_stall(adreno_smmu->cookie, true); + ret = adreno_smmu->set_ttbr0_cfg(adreno_smmu->cookie, &ttbr0_cfg); if (ret) { free_io_pgtable_ops(pagetable->pgtbl_ops); @@ -226,6 +229,13 @@ static int msm_fault_handler(struct iommu_domain *domain, struct device *dev, return 0; } +static void msm_iommu_resume_translation(struct msm_mmu *mmu) +{ + struct adreno_smmu_priv *adreno_smmu = dev_get_drvdata(mmu->dev); + + adreno_smmu->resume_translation(adreno_smmu->cookie, true); +} + static void msm_iommu_detach(struct msm_mmu *mmu) { struct msm_iommu *iommu = to_msm_iommu(mmu); @@ -273,6 +283,7 @@ static const struct msm_mmu_funcs funcs = { .map = msm_iommu_map, .unmap = msm_iommu_unmap, .destroy = msm_iommu_destroy, + .resume_translation = msm_iommu_resume_translation, }; struct msm_mmu *msm_iommu_new(struct device *dev, struct iommu_domain *domain) |