diff options
| -rw-r--r-- | drivers/gpu/drm/amd/amdgpu/amdgpu_device.c | 43 |
1 files changed, 35 insertions, 8 deletions
diff --git a/drivers/gpu/drm/amd/amdgpu/amdgpu_device.c b/drivers/gpu/drm/amd/amdgpu/amdgpu_device.c index ad97f03f1358..da06705f0026 100644 --- a/drivers/gpu/drm/amd/amdgpu/amdgpu_device.c +++ b/drivers/gpu/drm/amd/amdgpu/amdgpu_device.c @@ -3957,6 +3957,27 @@ static void amdgpu_device_check_iommu_direct_map(struct amdgpu_device *adev) adev->ram_is_direct_mapped = true; } +#if defined(CONFIG_HSA_AMD_P2P) +/** + * amdgpu_device_check_iommu_remap - Check if DMA remapping is enabled. + * + * @adev: amdgpu_device pointer + * + * return if IOMMU remapping bar address + */ +static bool amdgpu_device_check_iommu_remap(struct amdgpu_device *adev) +{ + struct iommu_domain *domain; + + domain = iommu_get_domain_for_dev(adev->dev); + if (domain && (domain->type == IOMMU_DOMAIN_DMA || + domain->type == IOMMU_DOMAIN_DMA_FQ)) + return true; + + return false; +} +#endif + static const struct attribute *amdgpu_dev_attributes[] = { &dev_attr_pcie_replay_count.attr, NULL @@ -6151,18 +6172,24 @@ bool amdgpu_device_is_peer_accessible(struct amdgpu_device *adev, struct amdgpu_device *peer_adev) { #ifdef CONFIG_HSA_AMD_P2P - uint64_t address_mask = peer_adev->dev->dma_mask ? - ~*peer_adev->dev->dma_mask : ~((1ULL << 32) - 1); - resource_size_t aper_limit = - adev->gmc.aper_base + adev->gmc.aper_size - 1; bool p2p_access = !adev->gmc.xgmi.connected_to_cpu && !(pci_p2pdma_distance(adev->pdev, peer_adev->dev, false) < 0); - return pcie_p2p && p2p_access && (adev->gmc.visible_vram_size && - adev->gmc.real_vram_size == adev->gmc.visible_vram_size && - !(adev->gmc.aper_base & address_mask || - aper_limit & address_mask)); + bool is_large_bar = adev->gmc.visible_vram_size && + adev->gmc.real_vram_size == adev->gmc.visible_vram_size; + bool p2p_addressable = amdgpu_device_check_iommu_remap(peer_adev); + + if (!p2p_addressable) { + uint64_t address_mask = peer_adev->dev->dma_mask ? + ~*peer_adev->dev->dma_mask : ~((1ULL << 32) - 1); + resource_size_t aper_limit = + adev->gmc.aper_base + adev->gmc.aper_size - 1; + + p2p_addressable = !(adev->gmc.aper_base & address_mask || + aper_limit & address_mask); + } + return is_large_bar && p2p_access && p2p_addressable; #else return false; #endif |