net: ipc_router: Add snapshot of IPC Router
This snapshot is taken as of msm-4.4 'commit <d2afad6a903b>
("Merge "ext4 crypto: enable HW based encryption with ICE"")'.
Additionally fix the code style warnings and errors.
CRs-Fixed: 1079350
Change-Id: I0972e0a42d12659fc854dce2491df3016704d756
Signed-off-by: Karthikeyan Ramasubramanian <kramasub@codeaurora.org>
diff --git a/include/linux/ipc_router_xprt.h b/include/linux/ipc_router_xprt.h
new file mode 100644
index 0000000..e33a10a
--- /dev/null
+++ b/include/linux/ipc_router_xprt.h
@@ -0,0 +1,175 @@
+/* Copyright (c) 2011-2016, The Linux Foundation. All rights reserved.
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License version 2 and
+ * only version 2 as published by the Free Software Foundation.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+ * GNU General Public License for more details.
+ */
+
+#ifndef _IPC_ROUTER_XPRT_H
+#define _IPC_ROUTER_XPRT_H
+
+#include <linux/types.h>
+#include <linux/errno.h>
+#include <linux/mm.h>
+#include <linux/list.h>
+#include <linux/platform_device.h>
+#include <linux/msm_ipc.h>
+#include <linux/ipc_router.h>
+#include <linux/kref.h>
+
+#define IPC_ROUTER_XPRT_EVENT_DATA 1
+#define IPC_ROUTER_XPRT_EVENT_OPEN 2
+#define IPC_ROUTER_XPRT_EVENT_CLOSE 3
+
+#define FRAG_PKT_WRITE_ENABLE 0x1
+
+/**
+ * rr_header_v1 - IPC Router header version 1
+ * @version: Version information.
+ * @type: IPC Router Message Type.
+ * @src_node_id: Source Node ID of the message.
+ * @src_port_id: Source Port ID of the message.
+ * @control_flag: Flag to indicate flow control.
+ * @size: Size of the IPC Router payload.
+ * @dst_node_id: Destination Node ID of the message.
+ * @dst_port_id: Destination Port ID of the message.
+ */
+struct rr_header_v1 {
+ uint32_t version;
+ uint32_t type;
+ uint32_t src_node_id;
+ uint32_t src_port_id;
+ uint32_t control_flag;
+ uint32_t size;
+ uint32_t dst_node_id;
+ uint32_t dst_port_id;
+};
+
+/**
+ * rr_header_v2 - IPC Router header version 2
+ * @version: Version information.
+ * @type: IPC Router Message Type.
+ * @control_flag: Flags to indicate flow control, optional header etc.
+ * @opt_len: Combined size of the all optional headers in units of words.
+ * @size: Size of the IPC Router payload.
+ * @src_node_id: Source Node ID of the message.
+ * @src_port_id: Source Port ID of the message.
+ * @dst_node_id: Destination Node ID of the message.
+ * @dst_port_id: Destination Port ID of the message.
+ */
+struct rr_header_v2 {
+ uint8_t version;
+ uint8_t type;
+ uint8_t control_flag;
+ uint8_t opt_len;
+ uint32_t size;
+ uint16_t src_node_id;
+ uint16_t src_port_id;
+ uint16_t dst_node_id;
+ uint16_t dst_port_id;
+} __attribute__((__packed__));
+
+union rr_header {
+ struct rr_header_v1 hdr_v1;
+ struct rr_header_v2 hdr_v2;
+};
+
+/**
+ * rr_opt_hdr - Optional header for IPC Router header version 2
+ * @len: Total length of the optional header.
+ * @data: Pointer to the actual optional header.
+ */
+struct rr_opt_hdr {
+ size_t len;
+ unsigned char *data;
+};
+
+#define IPC_ROUTER_HDR_SIZE sizeof(union rr_header)
+#define IPCR_WORD_SIZE 4
+
+/**
+ * rr_packet - Router to Router packet structure
+ * @list: Pointer to prev & next packets in a port's rx list.
+ * @hdr: Header information extracted from or prepended to a packet.
+ * @opt_hdr: Optinal header information.
+ * @pkt_fragment_q: Queue of SKBs containing payload.
+ * @length: Length of data in the chain of SKBs
+ * @ref: Reference count for the packet.
+ */
+struct rr_packet {
+ struct list_head list;
+ struct rr_header_v1 hdr;
+ struct rr_opt_hdr opt_hdr;
+ struct sk_buff_head *pkt_fragment_q;
+ uint32_t length;
+ struct kref ref;
+};
+
+/**
+ * msm_ipc_router_xprt - Structure to hold XPRT specific information
+ * @name: Name of the XPRT.
+ * @link_id: Network cluster ID to which the XPRT belongs to.
+ * @priv: XPRT's private data.
+ * @get_version: Method to get header version supported by the XPRT.
+ * @set_version: Method to set header version in XPRT.
+ * @get_option: Method to get XPRT specific options.
+ * @read_avail: Method to get data size available to be read from the XPRT.
+ * @read: Method to read data from the XPRT.
+ * @write_avail: Method to get write space available in the XPRT.
+ * @write: Method to write data to the XPRT.
+ * @close: Method to close the XPRT.
+ * @sft_close_done: Method to indicate to the XPRT that handling of reset
+ * event is complete.
+ */
+struct msm_ipc_router_xprt {
+ char *name;
+ uint32_t link_id;
+ void *priv;
+
+ int (*get_version)(struct msm_ipc_router_xprt *xprt);
+ int (*get_option)(struct msm_ipc_router_xprt *xprt);
+ void (*set_version)(struct msm_ipc_router_xprt *xprt,
+ unsigned int version);
+ int (*read_avail)(struct msm_ipc_router_xprt *xprt);
+ int (*read)(void *data, uint32_t len,
+ struct msm_ipc_router_xprt *xprt);
+ int (*write_avail)(struct msm_ipc_router_xprt *xprt);
+ int (*write)(void *data, uint32_t len,
+ struct msm_ipc_router_xprt *xprt);
+ int (*close)(struct msm_ipc_router_xprt *xprt);
+ void (*sft_close_done)(struct msm_ipc_router_xprt *xprt);
+};
+
+void msm_ipc_router_xprt_notify(struct msm_ipc_router_xprt *xprt,
+ unsigned int event,
+ void *data);
+
+/**
+ * create_pkt() - Create a Router packet
+ * @data: SKB queue to be contained inside the packet.
+ *
+ * @return: pointer to packet on success, NULL on failure.
+ */
+struct rr_packet *create_pkt(struct sk_buff_head *data);
+struct rr_packet *clone_pkt(struct rr_packet *pkt);
+void release_pkt(struct rr_packet *pkt);
+
+/**
+ * ipc_router_peek_pkt_size() - Peek into the packet header to get potential
+ * packet size
+ * @data: Starting address of the packet which points to router header.
+ *
+ * @returns: potential packet size on success, < 0 on error.
+ *
+ * This function is used by the underlying transport abstraction layer to
+ * peek into the potential packet size of an incoming packet. This information
+ * is used to perform link layer fragmentation and re-assembly
+ */
+int ipc_router_peek_pkt_size(char *data);
+
+#endif