drm/amdgpu: Calculate IP specific xgmi bandwidth

Use IP version specific xgmi speed/width for bandwidth calculation.

Signed-off-by: Lijo Lazar <[email protected]>
Reviewed-by: Jonathan Kim <[email protected]>
Signed-off-by: Alex Deucher <[email protected]>

Author: Lijo Lazar

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

@@ -2757,6 +2757,9 @@ static int amdgpu_device_ip_early_init(struct amdgpu_device *adev)
 	if (!total)
 		return -ENODEV;
 
+	if (adev->gmc.xgmi.supported)
+		amdgpu_xgmi_early_init(adev);
+
 	ip_block = amdgpu_device_ip_get_ip_block(adev, AMD_IP_BLOCK_TYPE_GFX);
 	if (ip_block->status.valid != false)
 		amdgpu_amdkfd_device_probe(adev);

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

@@ -844,7 +844,9 @@ int amdgpu_xgmi_get_bandwidth(struct amdgpu_device *adev, struct amdgpu_device *
 {
 	bool peer_mode = bw_mode == AMDGPU_XGMI_BW_MODE_PER_PEER;
 	int unit_scale = bw_unit == AMDGPU_XGMI_BW_UNIT_MBYTES ? 1000 : 1;
-	int speed = 25, num_lanes = 16, num_links = !peer_mode ? 1 : -1;
+	int num_lanes = adev->gmc.xgmi.max_width;
+	int speed = adev->gmc.xgmi.max_speed;
+	int num_links = !peer_mode ? 1 : -1;
 
 	if (!(min_bw && max_bw))
 		return -EINVAL;