From 2dc8f81e4f822cfe8f6475da968ab2dd5881b8d8 Mon Sep 17 00:00:00 2001 From: Horace Chen 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 Reviewed-by: Alex Deucher Signed-off-by: Alex Deucher --- drivers/gpu/drm/amd/amdgpu/mxgpu_ai.c | 6 ++++++ 1 file changed, 6 insertions(+) (limited to 'drivers/gpu/drm/amd/amdgpu/mxgpu_ai.c') diff --git a/drivers/gpu/drm/amd/amdgpu/mxgpu_ai.c b/drivers/gpu/drm/amd/amdgpu/mxgpu_ai.c index 2812d88a8bdd..b4906d2f30d3 100644 --- a/drivers/gpu/drm/amd/amdgpu/mxgpu_ai.c +++ b/drivers/gpu/drm/amd/amdgpu/mxgpu_ai.c @@ -183,6 +183,12 @@ static int xgpu_ai_send_access_requests(struct amdgpu_device *adev, pr_err("Doesn't get READY_TO_ACCESS_GPU from pf, give up\n"); return r; } + /* Retrieve checksum from mailbox2 */ + if (req == IDH_REQ_GPU_INIT_ACCESS) { + adev->virt.fw_reserve.checksum_key = + RREG32_NO_KIQ(SOC15_REG_OFFSET(NBIO, 0, + mmBIF_BX_PF0_MAILBOX_MSGBUF_RCV_DW2)); + } } return 0; -- cgit v1.2.3