From b680bd28e6b17b6b6cd3914719d8d9468ce7fb65 Mon Sep 17 00:00:00 2001
From: Felix Kuehling <Felix.Kuehling@amd.com>
Date: Wed, 24 Jun 2020 23:08:46 -0400
Subject: drm/amdgpu: Let KFD use more VMIDs on Arcturus
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Git-commit: 81659b2022cbdd7491f9480ab15afd38b91281d5
Patch-mainline: v5.9-rc1
References: jsc#SLE-12680, jsc#SLE-12880, jsc#SLE-12882, jsc#SLE-12883, jsc#SLE-13496, jsc#SLE-15322
When there is no graphics support, KFD can use more of the VMIDs. Graphics
VMIDs are only used for video decoding/encoding and post processing. With
two VCE engines, there is no reason to reserve more than 2 VMIDs for that.
Signed-off-by: Felix Kuehling <Felix.Kuehling@amd.com>
Reviewed-by: Christian König <christian.koenig@amd.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>
Signed-off-by: Patrik Jakobsson <pjakobsson@suse.de>
---
drivers/gpu/drm/amd/amdgpu/gmc_v9_0.c | 11 ++++++++---
1 file changed, 8 insertions(+), 3 deletions(-)
diff --git a/drivers/gpu/drm/amd/amdgpu/gmc_v9_0.c b/drivers/gpu/drm/amd/amdgpu/gmc_v9_0.c
index 6e10b42c57e5..3470929e5b8e 100644
--- a/drivers/gpu/drm/amd/amdgpu/gmc_v9_0.c
+++ b/drivers/gpu/drm/amd/amdgpu/gmc_v9_0.c
@@ -1245,10 +1245,15 @@ static int gmc_v9_0_sw_init(void *handle)
/*
* number of VMs
* VMID 0 is reserved for System
- * amdgpu graphics/compute will use VMIDs 1-7
- * amdkfd will use VMIDs 8-15
+ * amdgpu graphics/compute will use VMIDs 1..n-1
+ * amdkfd will use VMIDs n..15
+ *
+ * The first KFD VMID is 8 for GPUs with graphics, 3 for
+ * compute-only GPUs. On compute-only GPUs that leaves 2 VMIDs
+ * for video processing.
*/
- adev->vm_manager.first_kfd_vmid = 8;
+ adev->vm_manager.first_kfd_vmid =
+ adev->asic_type == CHIP_ARCTURUS ? 3 : 8;
amdgpu_vm_manager_init(adev);
--
2.29.2