[Public]
> -Original Message-
> From: Sasha Levin
> Sent: Tuesday, August 22, 2023 7:36 AM
> To: linux-ker...@vger.kernel.org; sta...@vger.kernel.org
> Cc: Deucher, Alexander ; Kuehling, Felix
> ; Koenig, Christian ;
> Mike Lothian ; Sasha Levin ; Pan,
> Xinhui ; airl...@gmail.com; dan...@ffwll.ch; amd-
> g...@lists.freedesktop.org; dri-devel@lists.freedesktop.org
> Subject: [PATCH AUTOSEL 6.4 10/11] drm/amdkfd: disable IOMMUv2
> support for KV/CZ
>
> From: Alex Deucher
>
> [ Upstream commit 616f92d188ee7142a95a52068efdbea82645f859 ]
>
> Use the dGPU path instead. There were a lot of platform issues with IOMMU
> in general on these chips due to windows not enabling IOMMU at the time.
> The dGPU path has been used for a long time with newer APUs and works
> fine. This also paves the way to simplify the driver significantly.
>
> v2: use the dGPU queue manager functions
This is not needed for stable.
Alex
>
> Reviewed-by: Felix Kuehling
> Acked-by: Christian König
> Tested-by: Mike Lothian
> Signed-off-by: Alex Deucher
> Signed-off-by: Sasha Levin
> ---
> drivers/gpu/drm/amd/amdkfd/kfd_device.c | 6 --
> drivers/gpu/drm/amd/amdkfd/kfd_device_queue_manager.c | 8 +---
> 2 files changed, 1 insertion(+), 13 deletions(-)
>
> diff --git a/drivers/gpu/drm/amd/amdkfd/kfd_device.c
> b/drivers/gpu/drm/amd/amdkfd/kfd_device.c
> index 00f528eb98126..9c8197573dee7 100644
> --- a/drivers/gpu/drm/amd/amdkfd/kfd_device.c
> +++ b/drivers/gpu/drm/amd/amdkfd/kfd_device.c
> @@ -224,10 +224,6 @@ static void kfd_device_info_init(struct kfd_dev *kfd,
> asic_type != CHIP_TONGA)
> kfd->device_info.supports_cwsr = true;
>
> - if (asic_type == CHIP_KAVERI ||
> - asic_type == CHIP_CARRIZO)
> - kfd->device_info.needs_iommu_device = true;
> -
> if (asic_type != CHIP_HAWAII && !vf)
> kfd->device_info.needs_pci_atomics = true;
> }
> @@ -240,7 +236,6 @@ struct kfd_dev *kgd2kfd_probe(struct
> amdgpu_device *adev, bool vf)
> uint32_t gfx_target_version = 0;
>
> switch (adev->asic_type) {
> -#ifdef KFD_SUPPORT_IOMMU_V2
> #ifdef CONFIG_DRM_AMDGPU_CIK
> case CHIP_KAVERI:
> gfx_target_version = 7;
> @@ -253,7 +248,6 @@ struct kfd_dev *kgd2kfd_probe(struct
> amdgpu_device *adev, bool vf)
> if (!vf)
> f2g = &gfx_v8_kfd2kgd;
> break;
> -#endif
> #ifdef CONFIG_DRM_AMDGPU_CIK
> case CHIP_HAWAII:
> gfx_target_version = 70001;
> diff --git a/drivers/gpu/drm/amd/amdkfd/kfd_device_queue_manager.c
> b/drivers/gpu/drm/amd/amdkfd/kfd_device_queue_manager.c
> index 7a95698d83f73..c73417e79745e 100644
> --- a/drivers/gpu/drm/amd/amdkfd/kfd_device_queue_manager.c
> +++ b/drivers/gpu/drm/amd/amdkfd/kfd_device_queue_manager.c
> @@ -2335,18 +2335,12 @@ struct device_queue_manager
> *device_queue_manager_init(struct kfd_dev *dev)
> }
>
> switch (dev->adev->asic_type) {
> - case CHIP_CARRIZO:
> - device_queue_manager_init_vi(&dqm->asic_ops);
> - break;
> -
> case CHIP_KAVERI:
> - device_queue_manager_init_cik(&dqm->asic_ops);
> - break;
> -
> case CHIP_HAWAII:
> device_queue_manager_init_cik_hawaii(&dqm->asic_ops);
> break;
>
> + case CHIP_CARRIZO:
> case CHIP_TONGA:
> case CHIP_FIJI:
> case CHIP_POLARIS10:
> --
> 2.40.1
