diff options
Diffstat (limited to 'drivers/staging/dream/smd/smd_rpcrouter.h')
| -rw-r--r-- | drivers/staging/dream/smd/smd_rpcrouter.h | 195 |
1 files changed, 195 insertions, 0 deletions
diff --git a/drivers/staging/dream/smd/smd_rpcrouter.h b/drivers/staging/dream/smd/smd_rpcrouter.h new file mode 100644 index 000000000000..a7416a2ec58c --- /dev/null +++ b/drivers/staging/dream/smd/smd_rpcrouter.h @@ -0,0 +1,195 @@ +/** 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 |