On Tue, Sep 26, 2017 at 7:30 PM, Yong Zhao <yong.zhao at amd.com> wrote:
> From: Yong Zhao <Yong.Zhao at amd.com>
>
> Without the additional bits set in PDEs/PTEs, the ATC memory access
> would have failed.
>
> Change-Id: I28429ef6d39cdb01dc6f17fea4264ee22d7121d4
> Signed-off-by: Yong Zhao <yong.zhao at amd.com>
Glad we finally got this sorted.
Acked-by: Alex Deucher <alexander.deucher at amd.com>
> ---
> drivers/gpu/drm/amd/amdgpu/amdgpu_vm.c | 18 +++++++++++++++---
> 1 file changed, 15 insertions(+), 3 deletions(-)
>
> diff --git a/drivers/gpu/drm/amd/amdgpu/amdgpu_vm.c b/drivers/gpu/drm/amd/amdgpu/amdgpu_vm.c
> index 8fcc743..c848b7c 100644
> --- a/drivers/gpu/drm/amd/amdgpu/amdgpu_vm.c
> +++ b/drivers/gpu/drm/amd/amdgpu/amdgpu_vm.c
> @@ -33,6 +33,8 @@
> #include "amdgpu.h"
> #include "amdgpu_trace.h"
>
> +#include "vega10/vega10_enum.h"
> +
> /*
> * PASID manager
> *
> @@ -108,6 +110,13 @@ INTERVAL_TREE_DEFINE(struct amdgpu_bo_va_mapping, rb, uint64_t, __subtree_last,
> #undef START
> #undef LAST
>
> +#define AMDGPU_PTE_DEFAULT_ATC (AMDGPU_PTE_SYSTEM \
> + | AMDGPU_PTE_SNOOPED \
> + | AMDGPU_PTE_EXECUTABLE \
> + | AMDGPU_PTE_READABLE \
> + | AMDGPU_PTE_WRITEABLE \
> + | AMDGPU_PTE_MTYPE(MTYPE_CC))
> +
> /* Local structure. Encapsulate some VM table update parameters to reduce
> * the number of function parameters
> */
> @@ -328,9 +337,10 @@ static int amdgpu_vm_alloc_levels(struct amdgpu_device *adev,
> AMDGPU_GEM_CREATE_SHADOW);
>
> if (vm->pte_support_ats) {
> - init_value = AMDGPU_PTE_SYSTEM;
> + init_value = AMDGPU_PTE_DEFAULT_ATC;
> if (level != adev->vm_manager.num_level - 1)
> init_value |= AMDGPU_PDE_PTE;
> +
> }
>
> /* walk over the address space and allocate the page tables */
> @@ -2017,7 +2027,7 @@ int amdgpu_vm_clear_freed(struct amdgpu_device *adev,
> list_del(&mapping->list);
>
> if (vm->pte_support_ats)
> - init_pte_value = AMDGPU_PTE_SYSTEM;
> + init_pte_value = AMDGPU_PTE_DEFAULT_ATC;
>
> r = amdgpu_vm_bo_update_mapping(adev, NULL, NULL, vm,
> mapping->start, mapping->last,
> @@ -2627,7 +2637,9 @@ int amdgpu_vm_init(struct amdgpu_device *adev, struct amdgpu_vm *vm,
>
> if (adev->asic_type == CHIP_RAVEN) {
> vm->pte_support_ats = true;
> - init_pde_value = AMDGPU_PTE_SYSTEM | AMDGPU_PDE_PTE;
> + init_pde_value = AMDGPU_PTE_DEFAULT_ATC
> + | AMDGPU_PDE_PTE;
> +
> }
> } else
> vm->use_cpu_for_update = !!(adev->vm_manager.vm_update_mode &
> --
> 2.7.4
>
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> amd-gfx at lists.freedesktop.org
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