drm/amdgpu: equip new req_init_data handshake

by this new handshake host side can prepare vbios/ip-discovery
and pf&vf exchange data upon recieving this request without
stopping world switch.

this way the world switch is less impacted by VF's exclusive mode
request
Signed-off-by: Monk Liu <Monk.Liu@amd.com>
Reviewed-by: Emily Deng <Emily.Deng@amd.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>

drivers/gpu/drm/amd/amdgpu/amdgpu_device.c

@@ -1798,6 +1798,21 @@ static int amdgpu_device_ip_early_init(struct amdgpu_device *adev)
 	amdgpu_amdkfd_device_probe(adev);
 
 	if (amdgpu_sriov_vf(adev)) {
+		/* handle vbios stuff prior full access mode for new handshake */
+		if (adev->virt.req_init_data_ver == 1) {
+			if (!amdgpu_get_bios(adev)) {
+				DRM_ERROR("failed to get vbios\n");
+				return -EINVAL;
+			}
+
+			r = amdgpu_atombios_init(adev);
+			if (r) {
+				dev_err(adev->dev, "amdgpu_atombios_init failed\n");
+				amdgpu_vf_error_put(adev, AMDGIM_ERROR_VF_ATOMBIOS_INIT_FAIL, 0, 0);
+				return r;
+			}
+		}
+
 		r = amdgpu_virt_request_full_gpu(adev, true);
 		if (r)
 			return -EAGAIN;
@@ -1830,6 +1845,10 @@ static int amdgpu_device_ip_early_init(struct amdgpu_device *adev)
 		}
 		/* get the vbios after the asic_funcs are set up */
 		if (adev->ip_blocks[i].version->type == AMD_IP_BLOCK_TYPE_COMMON) {
+			/* skip vbios handling for new handshake */
+			if (amdgpu_sriov_vf(adev) && adev->virt.req_init_data_ver == 1)
+				continue;
+
 			/* Read BIOS */
 			if (!amdgpu_get_bios(adev))
 				return -EINVAL;

drivers/gpu/drm/amd/amdgpu/nv.c

@@ -457,16 +457,19 @@ int nv_set_ip_blocks(struct amdgpu_device *adev)
 {
 	int r;
 
-	/* Set IP register base before any HW register access */
-	r = nv_reg_base_init(adev);
-	if (r)
-		return r;
-
 	adev->nbio.funcs = &nbio_v2_3_funcs;
 	adev->nbio.hdp_flush_reg = &nbio_v2_3_hdp_flush_reg;
 
-	if (amdgpu_sriov_vf(adev))
+	if (amdgpu_sriov_vf(adev)) {
 		adev->virt.ops = &xgpu_nv_virt_ops;
+		/* try send GPU_INIT_DATA request to host */
+		amdgpu_virt_request_init_data(adev);
+	}
+
+	/* Set IP register base before any HW register access */
+	r = nv_reg_base_init(adev);
+	if (r)
+		return r;
 
 	switch (adev->asic_type) {
 	case CHIP_NAVI10: