From: Ellen Pan <yunru.pan@amd.com>
Date: Tue, 7 Oct 2025 14:46:16 +0000 (-0500)
Subject: drm/amdgpu: Add SRIOV crit_region_version support
X-Git-Url: http://git.ipfire.org/gitweb.cgi?a=commitdiff_plain;h=6d2191d226553c86f8ea98f5e6cba13d9ef13280;p=thirdparty%2Flinux.git

drm/amdgpu: Add SRIOV crit_region_version support

1. Added enum amd_sriov_crit_region_version to support multi versions
2. Added logic in SRIOV mailbox to regonize crit_region version during
   req_gpu_init_data

Signed-off-by: Ellen Pan <yunru.pan@amd.com>
Reviewed-by: Alex Deucher <alexander.deucher@amd.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>
---

diff --git a/drivers/gpu/drm/amd/amdgpu/amdgpu_virt.c b/drivers/gpu/drm/amd/amdgpu/amdgpu_virt.c
index 8cd02eb605c54..56573fb27f633 100644
--- a/drivers/gpu/drm/amd/amdgpu/amdgpu_virt.c
+++ b/drivers/gpu/drm/amd/amdgpu/amdgpu_virt.c
@@ -150,9 +150,10 @@ void amdgpu_virt_request_init_data(struct amdgpu_device *adev)
 		virt->ops->req_init_data(adev);
 
 	if (adev->virt.req_init_data_ver > 0)
-		DRM_INFO("host supports REQ_INIT_DATA handshake\n");
+		dev_info(adev->dev, "host supports REQ_INIT_DATA handshake of critical_region_version %d\n",
+				 adev->virt.req_init_data_ver);
 	else
-		DRM_WARN("host doesn't support REQ_INIT_DATA handshake\n");
+		dev_warn(adev->dev, "host doesn't support REQ_INIT_DATA handshake\n");
 }
 
 /**
diff --git a/drivers/gpu/drm/amd/amdgpu/amdgpu_virt.h b/drivers/gpu/drm/amd/amdgpu/amdgpu_virt.h
index d1172c8e58c47..36247a160aa63 100644
--- a/drivers/gpu/drm/amd/amdgpu/amdgpu_virt.h
+++ b/drivers/gpu/drm/amd/amdgpu/amdgpu_virt.h
@@ -262,6 +262,11 @@ struct amdgpu_virt_ras {
 
 DECLARE_ATTR_CAP_CLASS(amdgpu_virt, AMDGPU_VIRT_CAPS_LIST);
 
+struct amdgpu_virt_region {
+	uint32_t offset;
+	uint32_t size_kb;
+};
+
 /* GPU virtualization */
 struct amdgpu_virt {
 	uint32_t			caps;
@@ -289,6 +294,9 @@ struct amdgpu_virt {
 	bool ras_init_done;
 	uint32_t reg_access;
 
+	/* dynamic(v2) critical regions */
+	struct amdgpu_virt_region init_data_header;
+
 	/* vf2pf message */
 	struct delayed_work vf2pf_work;
 	uint32_t vf2pf_update_interval_ms;
diff --git a/drivers/gpu/drm/amd/amdgpu/amdgv_sriovmsg.h b/drivers/gpu/drm/amd/amdgpu/amdgv_sriovmsg.h
index 7509756b9ac5a..9228fd2c6dfd9 100644
--- a/drivers/gpu/drm/amd/amdgpu/amdgv_sriovmsg.h
+++ b/drivers/gpu/drm/amd/amdgpu/amdgv_sriovmsg.h
@@ -66,6 +66,11 @@
 	(AMD_SRIOV_MSG_VBIOS_SIZE_KB_V1 + AMD_SRIOV_MSG_DATAEXCHANGE_SIZE_KB_V1 + \
 	 AMD_SRIOV_MSG_RAS_TELEMETRY_SIZE_KB_V1)
 
+enum amd_sriov_crit_region_version {
+	GPU_CRIT_REGION_V1 = 1,
+	GPU_CRIT_REGION_V2 = 2,
+};
+
 /*
  * PF2VF history log:
  * v1 defined in amdgim
diff --git a/drivers/gpu/drm/amd/amdgpu/mxgpu_nv.c b/drivers/gpu/drm/amd/amdgpu/mxgpu_nv.c
index e5282a5d05d95..cd5b2f07edb89 100644
--- a/drivers/gpu/drm/amd/amdgpu/mxgpu_nv.c
+++ b/drivers/gpu/drm/amd/amdgpu/mxgpu_nv.c
@@ -222,12 +222,20 @@ send_request:
 				adev->virt.req_init_data_ver = 0;
 		} else {
 			if (req == IDH_REQ_GPU_INIT_DATA) {
-				adev->virt.req_init_data_ver =
-					RREG32_NO_KIQ(mmMAILBOX_MSGBUF_RCV_DW1);
-
-				/* assume V1 in case host doesn't set version number */
-				if (adev->virt.req_init_data_ver < 1)
-					adev->virt.req_init_data_ver = 1;
+				switch (RREG32_NO_KIQ(mmMAILBOX_MSGBUF_RCV_DW1)) {
+				case GPU_CRIT_REGION_V2:
+					adev->virt.req_init_data_ver = GPU_CRIT_REGION_V2;
+					adev->virt.init_data_header.offset =
+						RREG32_NO_KIQ(mmMAILBOX_MSGBUF_RCV_DW2);
+					adev->virt.init_data_header.size_kb =
+						RREG32_NO_KIQ(mmMAILBOX_MSGBUF_RCV_DW3);
+					break;
+				default:
+					adev->virt.req_init_data_ver = GPU_CRIT_REGION_V1;
+					adev->virt.init_data_header.offset = -1;
+					adev->virt.init_data_header.size_kb = 0;
+					break;
+				}
 			}
 		}
 
@@ -285,7 +293,8 @@ static int xgpu_nv_release_full_gpu_access(struct amdgpu_device *adev,
 
 static int xgpu_nv_request_init_data(struct amdgpu_device *adev)
 {
-	return xgpu_nv_send_access_requests(adev, IDH_REQ_GPU_INIT_DATA);
+	return xgpu_nv_send_access_requests_with_param(adev, IDH_REQ_GPU_INIT_DATA,
+			0, GPU_CRIT_REGION_V2, 0);
 }
 
 static int xgpu_nv_mailbox_ack_irq(struct amdgpu_device *adev,