From 2dc8f81e4f822cfe8f6475da968ab2dd5881b8d8 Mon Sep 17 00:00:00 2001
From: Horace Chen <horace.chen@amd.com>
Date: Mon, 9 Oct 2017 16:17:16 +0800
Subject: drm/amdgpu: SR-IOV data exchange between PF&VF
SR-IOV need to exchange some data between PF&VF through shared VRAM
PF will copy some necessary firmware and information to the shared
VRAM. It also requires some information from VF. PF will send a
key through mailbox2 to help guest calculate checksum so that it can
verify whether the data is correct.
So check the data on the specified offset of the shared VRAM, if the
checksum is right, read values from it and write some VF information
next to the data from PF.
Signed-off-by: Horace Chen <horace.chen@amd.com>
Reviewed-by: Alex Deucher <alexander.deucher@amd.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>
---
drivers/gpu/drm/amd/amdgpu/amdgpu_device.c | 3 +++
1 file changed, 3 insertions(+)
(limited to 'drivers/gpu/drm/amd/amdgpu/amdgpu_device.c')
diff --git a/drivers/gpu/drm/amd/amdgpu/amdgpu_device.c b/drivers/gpu/drm/amd/amdgpu/amdgpu_device.c
index 1f793eb301ef..9cdaba4af216 100644
--- a/drivers/gpu/drm/amd/amdgpu/amdgpu_device.c
+++ b/drivers/gpu/drm/amd/amdgpu/amdgpu_device.c
@@ -2300,6 +2300,9 @@ int amdgpu_device_init(struct amdgpu_device *adev,
if (r)
DRM_ERROR("ib ring test failed (%d).\n", r);
+ if (amdgpu_sriov_vf(adev))
+ amdgpu_virt_init_data_exchange(adev);
+
amdgpu_fbdev_init(adev);
r = amdgpu_pm_sysfs_init(adev);
--
cgit