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/** arch/arm/mach-msm/smd_rpcrouter.h
*
* Copyright (C) 2007 Google, Inc.
* Copyright (c) 2007-2008 QUALCOMM Incorporated.
* Author: San Mehat <san@android.com>
*
* This software is licensed under the terms of the GNU General Public
* License version 2, as published by the Free Software Foundation, and
* may be copied, distributed, and modified under those terms.
*
* 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 _ARCH_ARM_MACH_MSM_SMD_RPCROUTER_H
#define _ARCH_ARM_MACH_MSM_SMD_RPCROUTER_H
#include <linux/types.h>
#include <linux/list.h>
#include <linux/cdev.h>
#include <linux/platform_device.h>
#include <linux/wakelock.h>
#include <mach/msm_smd.h>
#include <mach/msm_rpcrouter.h>
/* definitions for the R2R wire protcol */
#define RPCROUTER_VERSION 1
#define RPCROUTER_PROCESSORS_MAX 4
#define RPCROUTER_MSGSIZE_MAX 512
#define RPCROUTER_CLIENT_BCAST_ID 0xffffffff
#define RPCROUTER_ROUTER_ADDRESS 0xfffffffe
#define RPCROUTER_PID_LOCAL 1
#define RPCROUTER_PID_REMOTE 0
#define RPCROUTER_CTRL_CMD_DATA 1
#define RPCROUTER_CTRL_CMD_HELLO 2
#define RPCROUTER_CTRL_CMD_BYE 3
#define RPCROUTER_CTRL_CMD_NEW_SERVER 4
#define RPCROUTER_CTRL_CMD_REMOVE_SERVER 5
#define RPCROUTER_CTRL_CMD_REMOVE_CLIENT 6
#define RPCROUTER_CTRL_CMD_RESUME_TX 7
#define RPCROUTER_CTRL_CMD_EXIT 8
#define RPCROUTER_DEFAULT_RX_QUOTA 5
union rr_control_msg {
uint32_t cmd;
struct {
uint32_t cmd;
uint32_t prog;
uint32_t vers;
uint32_t pid;
uint32_t cid;
} srv;
struct {
uint32_t cmd;
uint32_t pid;
uint32_t cid;
} cli;
};
struct rr_header {
uint32_t version;
uint32_t type;
uint32_t src_pid;
uint32_t src_cid;
uint32_t confirm_rx;
uint32_t size;
uint32_t dst_pid;
uint32_t dst_cid;
};
/* internals */
#define RPCROUTER_MAX_REMOTE_SERVERS 100
struct rr_fragment {
unsigned char data[RPCROUTER_MSGSIZE_MAX];
uint32_t length;
struct rr_fragment *next;
};
struct rr_packet {
struct list_head list;
struct rr_fragment *first;
struct rr_fragment *last;
struct rr_header hdr;
uint32_t mid;
uint32_t length;
};
#define PACMARK_LAST(n) ((n) & 0x80000000)
#define PACMARK_MID(n) (((n) >> 16) & 0xFF)
#define PACMARK_LEN(n) ((n) & 0xFFFF)
static inline uint32_t PACMARK(uint32_t len, uint32_t mid, uint32_t first,
uint32_t last)
{
return (len & 0xFFFF) |
((mid & 0xFF) << 16) |
((!!first) << 30) |
((!!last) << 31);
}
struct rr_server {
struct list_head list;
uint32_t pid;
uint32_t cid;
uint32_t prog;
uint32_t vers;
dev_t device_number;
struct cdev cdev;
struct device *device;
struct rpcsvr_platform_device p_device;
char pdev_name[32];
};
struct rr_remote_endpoint {
uint32_t pid;
uint32_t cid;
int tx_quota_cntr;
spinlock_t quota_lock;
wait_queue_head_t quota_wait;
struct list_head list;
};
struct msm_rpc_endpoint {
struct list_head list;
/* incomplete packets waiting for assembly */
struct list_head incomplete;
/* complete packets waiting to be read */
struct list_head read_q;
spinlock_t read_q_lock;
struct wake_lock read_q_wake_lock;
wait_queue_head_t wait_q;
unsigned flags;
/* endpoint address */
uint32_t pid;
uint32_t cid;
/* bound remote address
* if not connected (dst_pid == 0xffffffff) RPC_CALL writes fail
* RPC_CALLs must be to the prog/vers below or they will fail
*/
uint32_t dst_pid;
uint32_t dst_cid;
uint32_t dst_prog; /* be32 */
uint32_t dst_vers; /* be32 */
/* reply remote address
* if reply_pid == 0xffffffff, none available
* RPC_REPLY writes may only go to the pid/cid/xid of the
* last RPC_CALL we received.
*/
uint32_t reply_pid;
uint32_t reply_cid;
uint32_t reply_xid; /* be32 */
uint32_t next_pm; /* Pacmark sequence */
/* device node if this endpoint is accessed via userspace */
dev_t dev;
};
/* shared between smd_rpcrouter*.c */
int __msm_rpc_read(struct msm_rpc_endpoint *ept,
struct rr_fragment **frag,
unsigned len, long timeout);
struct msm_rpc_endpoint *msm_rpcrouter_create_local_endpoint(dev_t dev);
int msm_rpcrouter_destroy_local_endpoint(struct msm_rpc_endpoint *ept);
int msm_rpcrouter_create_server_cdev(struct rr_server *server);
int msm_rpcrouter_create_server_pdev(struct rr_server *server);
int msm_rpcrouter_init_devices(void);
void msm_rpcrouter_exit_devices(void);
extern dev_t msm_rpcrouter_devno;
extern struct class *msm_rpcrouter_class;
#endif
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