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drm/amdgpu: Properly allocate VM invalidate eng v2

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commit c5066129af upstream.

v1: Properly allocate TLB invalidation engine to avoid conflict.
v2: Added comments to codes

Signed-off-by: Oak Zeng <Oak.Zeng@amd.com>
Reviewed-by: Alex Deucher <alexander.deucher@amd.com>
Acked-by: Christian Konig <christian.koenig@amd.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
This commit is contained in:
ozeng
2017-06-06 10:53:28 -05:00
committed by Greg Kroah-Hartman
parent a00b7ea3df
commit ecd08e684c
1 changed files with 12 additions and 3 deletions
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15
drivers/gpu/drm/amd/amdgpu/gmc_v9_0.c
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@@ -395,7 +395,16 @@ static int gmc_v9_0_early_init(void *handle)
static int gmc_v9_0_late_init(void *handle)
{
struct amdgpu_device *adev = (struct amdgpu_device *)handle;
unsigned vm_inv_eng[AMDGPU_MAX_VMHUBS] = { 3, 3 };
/*
* The latest engine allocation on gfx9 is:
* Engine 0, 1: idle
* Engine 2, 3: firmware
* Engine 4~13: amdgpu ring, subject to change when ring number changes
* Engine 14~15: idle
* Engine 16: kfd tlb invalidation
* Engine 17: Gart flushes
*/
unsigned vm_inv_eng[AMDGPU_MAX_VMHUBS] = { 4, 4 };
unsigned i;
for(i = 0; i < adev->num_rings; ++i) {
@@ -408,9 +417,9 @@ static int gmc_v9_0_late_init(void *handle)
ring->funcs->vmhub);
}
/* Engine 17 is used for GART flushes */
/* Engine 16 is used for KFD and 17 for GART flushes */
for(i = 0; i < AMDGPU_MAX_VMHUBS; ++i)
BUG_ON(vm_inv_eng[i] > 17);
BUG_ON(vm_inv_eng[i] > 16);
return amdgpu_irq_get(adev, &adev->mc.vm_fault, 0);
}