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drm/amd: Disable XNACK on SRIOV environment

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The purpose of this patch is to disable XNACK or set XNACK OFF mode
on SRIOV platform which doesn't support it.

This will prevent user-space application to fail or result into
unexpected behaviour whenever the application need to run test-case
in XNACK ON mode.

Signed-off-by: Surbhi Kakarya <surbhi.kakarya@amd.com>
Reviewed-by: Shaoyun Liu <shaoyun.liu@amd.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>
This commit is contained in:
Surbhi Kakarya 2023-09-25 12:12:10 -04:00 committed by Alex Deucher
parent 9ccde17d46
commit 9256e8d47a
4 changed files with 21 additions and 2 deletions
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5
drivers/gpu/drm/amd/amdgpu/amdgpu_gmc.c
View File

@ -826,7 +826,10 @@ void amdgpu_gmc_noretry_set(struct amdgpu_device *adev)
gc_ver == IP_VERSION(9, 4, 3) ||
gc_ver >= IP_VERSION(10, 3, 0));
gmc->noretry = (amdgpu_noretry == -1) ? noretry_default : amdgpu_noretry;
if (!amdgpu_sriov_xnack_support(adev))
gmc->noretry = 1;
else
gmc->noretry = (amdgpu_noretry == -1) ? noretry_default : amdgpu_noretry;
}
void amdgpu_gmc_set_vm_fault_masks(struct amdgpu_device *adev, int hub_type,

10
drivers/gpu/drm/amd/amdgpu/amdgpu_virt.c
View File

@ -1093,3 +1093,13 @@ u32 amdgpu_sriov_rreg(struct amdgpu_device *adev,
else
return RREG32(offset);
}
bool amdgpu_sriov_xnack_support(struct amdgpu_device *adev)
{
bool xnack_mode = true;
if (amdgpu_sriov_vf(adev) && adev->ip_versions[GC_HWIP][0] == IP_VERSION(9, 4, 2))
xnack_mode = false;
return xnack_mode;
}

1
drivers/gpu/drm/amd/amdgpu/amdgpu_virt.h
View File

@ -365,4 +365,5 @@ u32 amdgpu_sriov_rreg(struct amdgpu_device *adev,
bool amdgpu_virt_fw_load_skip_check(struct amdgpu_device *adev,
uint32_t ucode_id);
void amdgpu_virt_post_reset(struct amdgpu_device *adev);
bool amdgpu_sriov_xnack_support(struct amdgpu_device *adev);
#endif

7
drivers/gpu/drm/amd/amdkfd/kfd_process.c
View File

@ -1416,8 +1416,13 @@ bool kfd_process_xnack_mode(struct kfd_process *p, bool supported)
* per-process XNACK mode selection. But let the dev->noretry
* setting still influence the default XNACK mode.
*/
if (supported && KFD_SUPPORT_XNACK_PER_PROCESS(dev))
if (supported && KFD_SUPPORT_XNACK_PER_PROCESS(dev)) {
if (!amdgpu_sriov_xnack_support(dev->kfd->adev)) {
pr_debug("SRIOV platform xnack not supported\n");
return false;
}
continue;
}
/* GFXv10 and later GPUs do not support shader preemption
* during page faults. This can lead to poor QoS for queue