msm: camera: uapi: Add PF msg struct

Add data struct for reporting v4l2 event on page
fault. Upon receiving the event, userspace is
expected to abort, and all kernel drivers are shut
down. when Titan power on the next session, CAMSS
will undergo async reset.

CRs-Fixed: 3109439
Change-Id: I518148baa2414fd072b874200a408589332f95ec
Signed-off-by: sokchetra eung <[email protected]>

include/uapi/camera/media/cam_req_mgr.h

@@ -1,6 +1,7 @@
 /* SPDX-License-Identifier: GPL-2.0-only WITH Linux-syscall-note */
 /*
  * Copyright (c) 2016-2021, The Linux Foundation. All rights reserved.
+ * Copyright (c) 2022 Qualcomm Innovation Center, Inc. All rights reserved.
  */
 
 #ifndef __UAPI_LINUX_CAM_REQ_MGR_H
@@ -58,6 +59,7 @@
 #define V4L_EVENT_CAM_REQ_MGR_CUSTOM_EVT                                3
 #define V4L_EVENT_CAM_REQ_MGR_NODE_EVENT                                4
 #define V4L_EVENT_CAM_REQ_MGR_SOF_UNIFIED_TS                            5
+#define V4L_EVENT_CAM_REQ_MGR_PF_ERROR                                  6
 
 /* SOF Event status */
 #define CAM_REQ_MGR_SOF_EVENT_SUCCESS           0
@@ -604,10 +606,80 @@ struct cam_req_mgr_node_msg {
 };
 
 /**
- * struct cam_req_mgr_message
+ * Request Manager Msg Page Fault event
+ * @CAM_REQ_MGR_PF_EVT_BUF_NOT_FOUND          : Faulted buffer not found
+ * @CAM_REQ_MGR_PF_EVT_BUF_FOUND_IO_CFG       : Faulted buffer from io_cfg found
+ * @CAM_REQ_MGR_PF_EVT_BUF_FOUND_REF_BUF      : Faulted io region buffer in Patch found
+ * @CAM_REQ_MGR_PF_EVT_BUF_FOUND_CDM_SHARED   : Fault in cmd buffer/shared region buffer
+ */
+#define CAM_REQ_MGR_PF_EVT_BUF_NOT_FOUND            0
+#define CAM_REQ_MGR_PF_EVT_BUF_FOUND_IO_CFG         1
+#define CAM_REQ_MGR_PF_EVT_BUF_FOUND_REF_BUF        2
+#define CAM_REQ_MGR_PF_EVT_BUF_FOUND_CDM_SHARED     3
+
+/**
+ * Faulted Memory Type
+ * @CAM_REQ_MGR_PF_TYPE_NULL               : Fault on NULL
+ * @CAM_REQ_MGR_PF_TYPE_OUT_OF_BOUND       : Fault on address outside of any mapped buffer
+ * @CAM_REQ_MGR_PF_TYPE_MAPPED_REGION      : Fault on address within a mapped buffer
+ */
+#define CAM_REQ_MGR_PF_TYPE_NULL            0
+#define CAM_REQ_MGR_PF_TYPE_OUT_OF_BOUND    1
+#define CAM_REQ_MGR_PF_TYPE_MAPPED_REGION   2
+
+/**
+ * Faulted Memory stage
+ * @CAM_REQ_MGR_STAGE1_FAULT     : Faulted memory in non-secure stage
+ * @CAM_REQ_MGR_STAGE2_FAULT     : Faulted memory in secure stage
+ */
+#define CAM_REQ_MGR_STAGE1_FAULT     0
+#define CAM_REQ_MGR_STAGE2_FAULT     1
+
+/**
+ * struct cam_req_mgr_pf_err_msg
+ * @device_hdl          : device handle of the device reporting the error
+ * @link_hdl            : link hdl for real time devices
+ * @pf_evt              : indicates if no faulted buffer found or found
+ *                        io cfg faulted buffer or found ref faulted buffer
+ *                        or found cdm shared fautled buffer
+ * @pf_type             : indicates if page fault type is fault on NULL or
+ *                        fault out of bound or fault within mapped region
+ * @pf_stage            : indicates if faulted memory is from secure or non-secure region
+ * @patch_id            : index to which patch in the packet is faulted
+ * @buf_hdl             : faulted buffer memory handle
+ * @offset              : offset provided in the packet
+ * @port_id             : resource type of the io cfg in packet
+ * @far_delta           : memory gab between faulted addr and closest
+ *                        buffer's starting address
+ * @req_id              : request id for the faulted request
+ * @bid                 : bus id
+ * @pid                 : unique id for hw group of ports
+ * @mid                 : port id of hw
+ * @reserved            : reserved fields
+ */
+struct cam_req_mgr_pf_err_msg {
+	__s32 device_hdl;
+	__s32 link_hdl;
+	__u8 pf_evt;
+	__u8 pf_type;
+	__u8 pf_stage;
+	__u8 patch_id;
+	__s32 buf_hdl;
+	__u32 offset;
+	__u32 port_id;
+	__u64 far_delta;
+	__u64 req_id;
+	__u8 bid;
+	__u8 pid;
+	__u16 mid;
+	__u32 reserved[3];
+};
+
+/**
+ * struct cam_req_mgr_message - 64 bytes is the max size that can be sent as v4l2 evt
  * @session_hdl: session to which the frame belongs to
  * @reserved: reserved field
- * @u: union which can either be error/frame/custom/node message
+ * @u: union which can either be error/frame/custom/node message/page fault message
  */
 struct cam_req_mgr_message {
 	__s32 session_hdl;
@@ -618,6 +690,7 @@ struct cam_req_mgr_message {
 		struct cam_req_mgr_frame_msg_v2 frame_msg_v2;
 		struct cam_req_mgr_custom_msg custom_msg;
 		struct cam_req_mgr_node_msg node_msg;
+		struct cam_req_mgr_pf_err_msg pf_err_msg;
 	} u;
 };
 #endif /* __UAPI_LINUX_CAM_REQ_MGR_H */