[PATCH 2/4] drm/amdgpu: indirect register access for nv12 sriov

[Peng Ju Zhou <PengJu.Zhou@amd.com>]

get pf2vf msg info at it's earliest time so that
guest driver can use these info to decide whether
register indirect access enabled.

Signed-off-by: Peng Ju Zhou <PengJu.Zhou@amd.com>
---
 drivers/gpu/drm/amd/amdgpu/amdgpu_device.c | 5 +++++
 drivers/gpu/drm/amd/amdgpu/amdgpu_virt.c   | 8 ++++++++
 2 files changed, 13 insertions(+)

diff --git a/drivers/gpu/drm/amd/amdgpu/amdgpu_device.c b/drivers/gpu/drm/amd/amdgpu/amdgpu_device.c
index a501d1a4d000..060d0ae99453 100644
--- a/drivers/gpu/drm/amd/amdgpu/amdgpu_device.c
+++ b/drivers/gpu/drm/amd/amdgpu/amdgpu_device.c
@@ -2080,6 +2080,11 @@ static int amdgpu_device_ip_early_init(struct amdgpu_device *adev)
 				amdgpu_vf_error_put(adev, AMDGIM_ERROR_VF_ATOMBIOS_INIT_FAIL, 0, 0);
 				return r;
 			}
+
+			/*get pf2vf msg info at it's earliest time*/
+			if (amdgpu_sriov_vf(adev))
+				amdgpu_virt_init_data_exchange(adev);
+
 		}
 	}
 
diff --git a/drivers/gpu/drm/amd/amdgpu/amdgpu_virt.c b/drivers/gpu/drm/amd/amdgpu/amdgpu_virt.c
index d9ffff8eb41d..b62f134d6dd5 100644
--- a/drivers/gpu/drm/amd/amdgpu/amdgpu_virt.c
+++ b/drivers/gpu/drm/amd/amdgpu/amdgpu_virt.c
@@ -617,6 +617,14 @@ void amdgpu_virt_init_data_exchange(struct amdgpu_device *adev)
 				if (adev->virt.ras_init_done)
 					amdgpu_virt_add_bad_page(adev, bp_block_offset, bp_block_size);
 			}
+	} else if (adev->bios != NULL) {
+		adev->virt.fw_reserve.p_pf2vf =
+			(struct amd_sriov_msg_pf2vf_info_header *)
+			(adev->bios + (AMD_SRIOV_MSG_PF2VF_OFFSET_KB << 10));
+
+		amdgpu_virt_read_pf2vf_data(adev);
+
+		return;
 	}
 
 	if (adev->virt.vf2pf_update_interval_ms != 0) {
-- 
2.17.1

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