[PATCH 1/2] drm/amdgpu: fix GFX10 missing CSIB set

[Zhang, Hawking]

[AMD Official Use Only - Internal Distribution Only]

The gfx10 PG and gfxoff are fully controlled by RLC and SMU fw and don't need driver to be involved anymore. So the legacy programing for gfx_idle_threshold.etc will not be applied to gfx10. 

More aggressively, let's drop gfx_v10_0_init_pg and just init csb. 

Regards,
Hawking
-----Original Message-----
From: Liu, Monk <Monk.Liu at amd.com> 
Sent: 2019年11月29日 16:47
To: Zhang, Hawking <Hawking.Zhang at amd.com>; amd-gfx at lists.freedesktop.org
Subject: RE: [PATCH 1/2] drm/amdgpu: fix GFX10 missing CSIB set

For now init_pg() is good enough for bare-metal and SR-IOV, but checkout GFX9, there are more jobs in init_pg(), so in the future I'd expect there will be More lines come into init_pg() on gfx10 and by that time I need to modify init_pg() , 

So IMHO the best way is use init_csb() from the beginning 

Thanks
_____________________________________
Monk Liu|GPU Virtualization Team |AMD


-----Original Message-----
From: Zhang, Hawking <Hawking.Zhang at amd.com> 
Sent: Friday, November 29, 2019 4:43 PM
To: Liu, Monk <Monk.Liu at amd.com>; amd-gfx at lists.freedesktop.org
Cc: Liu, Monk <Monk.Liu at amd.com>
Subject: RE: [PATCH 1/2] drm/amdgpu: fix GFX10 missing CSIB set

[AMD Official Use Only - Internal Distribution Only]

I don't think you need to introduce SRIOV specific path here. The gfx_v10_0_init_pg should be good enough to cover both bare-metal and virtualization case. 

You can drop the tlb flush in that function if that's your major concern.

Regards,
Hawking
-----Original Message-----
From: amd-gfx <amd-gfx-bounces at lists.freedesktop.org> On Behalf Of Monk Liu
Sent: 2019年11月29日 16:24
To: amd-gfx at lists.freedesktop.org
Cc: Liu, Monk <Monk.Liu at amd.com>
Subject: [PATCH 1/2] drm/amdgpu: fix GFX10 missing CSIB set

still need to init csb even for SRIOV

Signed-off-by: Monk Liu <Monk.Liu at amd.com>
---
 drivers/gpu/drm/amd/amdgpu/gfx_v10_0.c | 8 +++++---
 1 file changed, 5 insertions(+), 3 deletions(-)

diff --git a/drivers/gpu/drm/amd/amdgpu/gfx_v10_0.c b/drivers/gpu/drm/amd/amdgpu/gfx_v10_0.c
index 74edfd9..230e8af 100644
--- a/drivers/gpu/drm/amd/amdgpu/gfx_v10_0.c
+++ b/drivers/gpu/drm/amd/amdgpu/gfx_v10_0.c
@@ -1874,14 +1874,16 @@ static int gfx_v10_0_rlc_resume(struct amdgpu_device *adev)  {
 	int r;
 
-	if (amdgpu_sriov_vf(adev))
-		return 0;
-
 	if (adev->firmware.load_type == AMDGPU_FW_LOAD_PSP) {
 		r = gfx_v10_0_wait_for_rlc_autoload_complete(adev);
 		if (r)
 			return r;
 
+		if (amdgpu_sriov_vf(adev)) {
+			gfx_v10_0_init_csb(adev);
+			return 0;
+		}
+
 		r = gfx_v10_0_init_pg(adev);
 		if (r)
 			return r;
--
2.7.4

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