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From 3e0a43d9fc5236d2b946e0e6bf089565daffc5be Mon Sep 17 00:00:00 2001
From: Jack Xiao <Jack.Xiao@amd.com>
Date: Fri, 24 May 2019 00:13:14 +0800
Subject: [PATCH 2615/2940] drm/amdgpu: enable PCIE atomics ops support
GPU atomics operation depends on PCIE atomics support.
Always enable PCIE atomics ops support in case that
it hasn't been enabled.
Signed-off-by: Jack Xiao <Jack.Xiao@amd.com>
Reviewed-by: Hawking Zhang <Hawking.Zhang@amd.com>
---
drivers/gpu/drm/amd/amdgpu/amdgpu_device.c | 11 +++++++++++
1 file changed, 11 insertions(+)
diff --git a/drivers/gpu/drm/amd/amdgpu/amdgpu_device.c b/drivers/gpu/drm/amd/amdgpu/amdgpu_device.c
index 6a87bafbe2f2..4a76f062906e 100644
--- a/drivers/gpu/drm/amd/amdgpu/amdgpu_device.c
+++ b/drivers/gpu/drm/amd/amdgpu/amdgpu_device.c
@@ -2589,6 +2589,17 @@ int amdgpu_device_init(struct amdgpu_device *adev,
if (adev->rio_mem == NULL)
DRM_INFO("PCI I/O BAR is not found.\n");
+ /* enable PCIE atomic ops */
+ r = pci_enable_atomic_ops_to_root(adev->pdev,
+ PCI_EXP_DEVCAP2_ATOMIC_COMP32 |
+ PCI_EXP_DEVCAP2_ATOMIC_COMP64);
+ if (r) {
+ adev->have_atomics_support = false;
+ DRM_INFO("PCIE atomic ops is not supported\n");
+ } else {
+ adev->have_atomics_support = true;
+ }
+
amdgpu_device_get_pcie_info(adev);
if (amdgpu_mcbp)
--
2.17.1
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