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drm/amdgpu: enable paging queue doorbell support v4

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Because increase SDMA_DOORBELL_RANGE to add new SDMA doorbell for paging queue will
break SRIOV, instead we can reserve and map two doorbell pages for amdgpu, paging
queues doorbell index use same index as SDMA gfx queues index but on second page.

For Vega20, after we change doorbell layout to increase SDMA doorbell for 8 SDMA RLC
queues later, we could use new doorbell index for paging queue.

Signed-off-by: Philip Yang <Philip.Yang@amd.com>
Reviewed-by: Felix Kuehling <Felix.Kuehling@amd.com>
Reviewed-by: Alex Deucher <alexander.deucher@amd.com>
Reviewed-by: Christian König <christian.koenig@amd.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>
This commit is contained in:
Philip Yang
2018-11-19 10:36:02 -05:00
committed by Alex Deucher
parent bc5ab2d29b
commit ec3db8a63d
2 changed files with 25 additions and 9 deletions
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6
drivers/gpu/drm/amd/amdgpu/amdgpu_device.c
View File

@@ -534,6 +534,12 @@ static int amdgpu_device_doorbell_init(struct amdgpu_device *adev)
if (adev->doorbell.num_doorbells == 0)
return -EINVAL;
/* For Vega, reserve and map two pages on doorbell BAR since SDMA
* paging queue doorbell use the second page
*/
if (adev->asic_type >= CHIP_VEGA10)
adev->doorbell.num_doorbells *= 2;
adev->doorbell.ptr = ioremap(adev->doorbell.base,
adev->doorbell.num_doorbells *
sizeof(u32));