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-----Original Message-----
From: Surbhi Kakarya <surbhi.kakarya@xxxxxxx>
Sent: Monday, October 30, 2023 9:54 PM
To: amd-gfx@xxxxxxxxxxxxxxxxxxxxx; Yang, Philip <Philip.Yang@xxxxxxx>
Cc: Kakarya, Surbhi <Surbhi.Kakarya@xxxxxxx>
Subject: [PATCH] drm: Disable XNACK on SRIOV environment
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@xxxxxxx>
---
drivers/gpu/drm/amd/amdgpu/amdgpu_gmc.c | 5 ++++- drivers/gpu/drm/amd/amdgpu/amdgpu_virt.c | 9 +++++++++ drivers/gpu/drm/amd/amdgpu/amdgpu_virt.h | 1 + drivers/gpu/drm/amd/amdkfd/kfd_process.c | 10 ++++++++--
4 files changed, 22 insertions(+), 3 deletions(-)
diff --git a/drivers/gpu/drm/amd/amdgpu/amdgpu_gmc.c b/drivers/gpu/drm/amd/amdgpu/amdgpu_gmc.c
index 2dce338b0f1e..d582b240f919 100644
--- a/drivers/gpu/drm/amd/amdgpu/amdgpu_gmc.c
+++ b/drivers/gpu/drm/amd/amdgpu/amdgpu_gmc.c
@@ -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->norety = 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, diff --git a/drivers/gpu/drm/amd/amdgpu/amdgpu_virt.c b/drivers/gpu/drm/amd/amdgpu/amdgpu_virt.c
index a0aa624f5a92..41c77d5c5a79 100644
--- a/drivers/gpu/drm/amd/amdgpu/amdgpu_virt.c
+++ b/drivers/gpu/drm/amd/amdgpu/amdgpu_virt.c
@@ -1093,3 +1093,12 @@ u32 amdgpu_sriov_rreg(struct amdgpu_device *adev,
else
return RREG32(offset);
}
+bool amdgpu_sriov_xnack_support(struct amdgpu_device *adev) {
+ bool xnack_mode = 1;
+
+ if (amdgpu_sriov_vf(adev) && (adev->ip_versions[GC_HWIP][0] == IP_VERSION(9, 4, 2)))
+ xnack_mode = 0;
+
+ return xnack_mode;
+}
diff --git a/drivers/gpu/drm/amd/amdgpu/amdgpu_virt.h b/drivers/gpu/drm/amd/amdgpu/amdgpu_virt.h
index 858ef21ae515..935ca736300e 100644
--- a/drivers/gpu/drm/amd/amdgpu/amdgpu_virt.h
+++ b/drivers/gpu/drm/amd/amdgpu/amdgpu_virt.h
@@ -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
diff --git a/drivers/gpu/drm/amd/amdkfd/kfd_process.c b/drivers/gpu/drm/amd/amdkfd/kfd_process.c
index fbf053001af9..69954a2a8503 100644
--- a/drivers/gpu/drm/amd/amdkfd/kfd_process.c
+++ b/drivers/gpu/drm/amd/amdkfd/kfd_process.c
@@ -1416,8 +1416,14 @@ 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))
- continue;
+ 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;
+ }
+ else
+ continue;
+ }
/* GFXv10 and later GPUs do not support shader preemption
* during page faults. This can lead to poor QoS for queue
--
2.25.1
