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From dec22ddfd540e1cba1b5e40d48925a1484309a9d Mon Sep 17 00:00:00 2001
From: Jay Cornwall <Jay.Cornwall@amd.com>
Date: Thu, 1 Dec 2016 19:39:17 -0600
Subject: [PATCH 0834/4131] drm/amdkfd: Reject devices without host atomic
support
HSA requires atomic operations from device to host for all ASICs from
Gfx8 onwards. APUs implicitly support this through ATS. Discrete GPUs
require PCI support to route atomics to the host bridge and complete
them.
Do not bind to PCI devices which cannot route atomics to the host.
Change-Id: Ieea113713229a81296a8f2565762b422eaf7122c
Signed-off-by: Jay Cornwall <Jay.Cornwall@amd.com>
Signed-off-by: Kalyan Alle <kalyan.alle@amd.com>
Conflicts:
drivers/gpu/drm/amd/amdgpu/gmc_v8_0.c
---
drivers/gpu/drm/amd/amdgpu/gmc_v8_0.c | 4 ----
1 file changed, 4 deletions(-)
diff --git a/drivers/gpu/drm/amd/amdgpu/gmc_v8_0.c b/drivers/gpu/drm/amd/amdgpu/gmc_v8_0.c
index 6a8d7cb..3b3326d 100644
--- a/drivers/gpu/drm/amd/amdgpu/gmc_v8_0.c
+++ b/drivers/gpu/drm/amd/amdgpu/gmc_v8_0.c
@@ -1136,10 +1136,6 @@ static int gmc_v8_0_sw_init(void *handle)
adev->vm_manager.vram_base_offset = 0;
}
- /* Allow BIF to recode atomics to PCIe 3.0 AtomicOps.
- */
- pci_enable_atomic_ops_to_root(adev->pdev);
-
return 0;
}
--
2.7.4
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