[PATCH 3/4] drm/amdgpu: invoke req full access early enough

["Wenhui.Sheng" <Wenhui.Sheng@amd.com>]

From: Wenhui Sheng <Wenhui.Sheng@amd.com>

From SIENNA_CICHLID, HW introduce a new protection
feature which can control the FB, doorbell and MMIO
write access for VF, so guest driver should request
full access before ip discovery, or we couldn't access
ip discovery data in FB.

Signed-off-by: Wenhui Sheng <Wenhui.Sheng@amd.com>
---
 drivers/gpu/drm/amd/amdgpu/amdgpu_device.c | 54 +++++++++-------------
 1 file changed, 23 insertions(+), 31 deletions(-)

diff --git a/drivers/gpu/drm/amd/amdgpu/amdgpu_device.c b/drivers/gpu/drm/amd/amdgpu/amdgpu_device.c
index 2858c09fd8c0..138ace9c28d6 100644
--- a/drivers/gpu/drm/amd/amdgpu/amdgpu_device.c
+++ b/drivers/gpu/drm/amd/amdgpu/amdgpu_device.c
@@ -1722,6 +1722,29 @@ static int amdgpu_device_ip_early_init(struct amdgpu_device *adev)
 
 	amdgpu_device_enable_virtual_display(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) {
+			amdgpu_atombios_fini(adev);
+			return r;
+		}
+	}
+
 	switch (adev->asic_type) {
 #ifdef CONFIG_DRM_AMDGPU_SI
 	case CHIP_VERDE:
@@ -1801,31 +1824,6 @@ 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;
-			}
-		}
-	}
-
-	/* we need to send REQ_GPU here for legacy handshaker otherwise the vbios
-	 * will not be prepared by host for this VF */
-	if (amdgpu_sriov_vf(adev) && adev->virt.req_init_data_ver < 1) {
-		r = amdgpu_virt_request_full_gpu(adev, true);
-		if (r)
-			return r;
-	}
-
 	adev->pm.pp_feature = amdgpu_pp_feature_mask;
 	if (amdgpu_sriov_vf(adev) || sched_policy == KFD_SCHED_POLICY_NO_HWS)
 		adev->pm.pp_feature &= ~PP_GFXOFF_MASK;
@@ -1987,12 +1985,6 @@ static int amdgpu_device_ip_init(struct amdgpu_device *adev)
 	if (r)
 		return r;
 
-	if (amdgpu_sriov_vf(adev) && adev->virt.req_init_data_ver > 0) {
-		r = amdgpu_virt_request_full_gpu(adev, true);
-		if (r)
-			return -EAGAIN;
-	}
-
 	for (i = 0; i < adev->num_ip_blocks; i++) {
 		if (!adev->ip_blocks[i].status.valid)
 			continue;
-- 
2.17.1

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