* [PATCH AUTOSEL 6.1 09/14] drm/amdgpu: set gfx9 onwards APU atomics support to be true
[not found] <20230520182044.836702-1-sashal@kernel.org>
@ 2023-05-20 18:20 ` Sasha Levin
0 siblings, 0 replies; only message in thread
From: Sasha Levin @ 2023-05-20 18:20 UTC (permalink / raw)
To: linux-kernel, stable
Cc: Sasha Levin, Yifan Zhang, lijo.lazar, dri-devel,
andrey.grodzovsky, Amaranath.Somalapuram, airlied, Felix Kuehling,
Xinhui.Pan, amd-gfx, YiPeng.Chai, mario.limonciello, daniel,
Bokun.Zhang, Alex Deucher, Lang Yu, christian.koenig,
Hawking.Zhang
From: Yifan Zhang <yifan1.zhang@amd.com>
[ Upstream commit af7828fbceed4f9e503034111066a0adef3db383 ]
APUs w/ gfx9 onwards doesn't reply on PCIe atomics, rather
it is internal path w/ native atomic support. Set have_atomics_support
to true.
Signed-off-by: Yifan Zhang <yifan1.zhang@amd.com>
Reviewed-by: Lang Yu <lang.yu@amd.com>
Acked-by: Felix Kuehling <Felix.Kuehling@amd.com>
Acked-by: Alex Deucher <alexander.deucher@amd.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>
Signed-off-by: Sasha Levin <sashal@kernel.org>
---
drivers/gpu/drm/amd/amdgpu/amdgpu_device.c | 6 ++++++
1 file changed, 6 insertions(+)
diff --git a/drivers/gpu/drm/amd/amdgpu/amdgpu_device.c b/drivers/gpu/drm/amd/amdgpu/amdgpu_device.c
index 011e4fbe27f10..646a211e1a964 100644
--- a/drivers/gpu/drm/amd/amdgpu/amdgpu_device.c
+++ b/drivers/gpu/drm/amd/amdgpu/amdgpu_device.c
@@ -3735,6 +3735,12 @@ int amdgpu_device_init(struct amdgpu_device *adev,
adev->have_atomics_support = ((struct amd_sriov_msg_pf2vf_info *)
adev->virt.fw_reserve.p_pf2vf)->pcie_atomic_ops_support_flags ==
(PCI_EXP_DEVCAP2_ATOMIC_COMP32 | PCI_EXP_DEVCAP2_ATOMIC_COMP64);
+ /* APUs w/ gfx9 onwards doesn't reply on PCIe atomics, rather it is a
+ * internal path natively support atomics, set have_atomics_support to true.
+ */
+ else if ((adev->flags & AMD_IS_APU) &&
+ (adev->ip_versions[GC_HWIP][0] > IP_VERSION(9, 0, 0)))
+ adev->have_atomics_support = true;
else
adev->have_atomics_support =
!pci_enable_atomic_ops_to_root(adev->pdev,
--
2.39.2
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