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| author | David Belanger <david.belanger@amd.com> | 2024-07-02 17:56:41 -0400 |
|---|---|---|
| committer | Greg Kroah-Hartman <gregkh@linuxfoundation.org> | 2025-03-28 22:03:31 +0100 |
| commit | 8201c17e986e6c1ee7c6a9a781f881843d82ad47 (patch) | |
| tree | 7dfc1660f92377fcb5a2e895954044911eeb6d56 | |
| parent | eacbc9d28391be33cd47024aeb72e4fd33f2c646 (diff) | |
| download | linux-8201c17e986e6c1ee7c6a9a781f881843d82ad47.tar.gz linux-8201c17e986e6c1ee7c6a9a781f881843d82ad47.tar.bz2 linux-8201c17e986e6c1ee7c6a9a781f881843d82ad47.zip | |
drm/amdgpu: Restore uncached behaviour on GFX12
commit 35b6162bb790555ad56b7f0d120e307b8334d778 upstream.
Always use MTYPE_UC if UNCACHED flag is specified.
This makes kernarg region uncached and it restores
usermode cache disable debug flag functionality.
Do not set MTYPE_UC for COHERENT flag, on GFX12 coherence is handled by
shader code.
Signed-off-by: David Belanger <david.belanger@amd.com>
Reviewed-by: Felix Kuehling <felix.kuehling@amd.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>
(cherry picked from commit eb6cdfb807d038d9b9986b5c87188f28a4071eae)
Cc: stable@vger.kernel.org # 6.12.x
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
| -rw-r--r-- | drivers/gpu/drm/amd/amdgpu/gmc_v12_0.c | 22 | ||||
| -rw-r--r-- | drivers/gpu/drm/amd/amdkfd/kfd_svm.c | 8 |
2 files changed, 3 insertions, 27 deletions
diff --git a/drivers/gpu/drm/amd/amdgpu/gmc_v12_0.c b/drivers/gpu/drm/amd/amdgpu/gmc_v12_0.c index 9c6824e1c156..60acf676000b 100644 --- a/drivers/gpu/drm/amd/amdgpu/gmc_v12_0.c +++ b/drivers/gpu/drm/amd/amdgpu/gmc_v12_0.c @@ -498,9 +498,6 @@ static void gmc_v12_0_get_vm_pte(struct amdgpu_device *adev, uint64_t *flags) { struct amdgpu_bo *bo = mapping->bo_va->base.bo; - struct amdgpu_device *bo_adev; - bool coherent, is_system; - *flags &= ~AMDGPU_PTE_EXECUTABLE; *flags |= mapping->flags & AMDGPU_PTE_EXECUTABLE; @@ -516,26 +513,11 @@ static void gmc_v12_0_get_vm_pte(struct amdgpu_device *adev, *flags &= ~AMDGPU_PTE_VALID; } - if (!bo) - return; - - if (bo->flags & (AMDGPU_GEM_CREATE_COHERENT | - AMDGPU_GEM_CREATE_UNCACHED)) - *flags = AMDGPU_PTE_MTYPE_GFX12(*flags, MTYPE_UC); - - bo_adev = amdgpu_ttm_adev(bo->tbo.bdev); - coherent = bo->flags & AMDGPU_GEM_CREATE_COHERENT; - is_system = bo->tbo.resource && - (bo->tbo.resource->mem_type == TTM_PL_TT || - bo->tbo.resource->mem_type == AMDGPU_PL_PREEMPT); - if (bo && bo->flags & AMDGPU_GEM_CREATE_GFX12_DCC) *flags |= AMDGPU_PTE_DCC; - /* WA for HW bug */ - if (is_system || ((bo_adev != adev) && coherent)) - *flags = AMDGPU_PTE_MTYPE_GFX12(*flags, MTYPE_NC); - + if (bo && bo->flags & AMDGPU_GEM_CREATE_UNCACHED) + *flags = AMDGPU_PTE_MTYPE_GFX12(*flags, MTYPE_UC); } static unsigned gmc_v12_0_get_vbios_fb_size(struct amdgpu_device *adev) diff --git a/drivers/gpu/drm/amd/amdkfd/kfd_svm.c b/drivers/gpu/drm/amd/amdkfd/kfd_svm.c index 1893c27746a5..8c61dee5ca0d 100644 --- a/drivers/gpu/drm/amd/amdkfd/kfd_svm.c +++ b/drivers/gpu/drm/amd/amdkfd/kfd_svm.c @@ -1276,13 +1276,7 @@ svm_range_get_pte_flags(struct kfd_node *node, break; case IP_VERSION(12, 0, 0): case IP_VERSION(12, 0, 1): - if (domain == SVM_RANGE_VRAM_DOMAIN) { - if (bo_node != node) - mapping_flags |= AMDGPU_VM_MTYPE_NC; - } else { - mapping_flags |= coherent ? - AMDGPU_VM_MTYPE_UC : AMDGPU_VM_MTYPE_NC; - } + mapping_flags |= AMDGPU_VM_MTYPE_NC; break; default: mapping_flags |= coherent ? |