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/* Copyright (c) 2012-2013, 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_LOGGING_PRIVATE_H
#define _IPC_LOGGING_PRIVATE_H
#include <linux/ipc_logging.h>
struct ipc_log_page_header {
uint32_t magic;
uint32_t nmagic; /* inverse of magic number */
uint32_t log_id; /* owner of log */
uint32_t page_num;
uint16_t read_offset;
uint16_t write_offset;
struct list_head list;
};
struct ipc_log_page {
struct ipc_log_page_header hdr;
char data[PAGE_SIZE - sizeof(struct ipc_log_page_header)];
};
struct ipc_log_context {
struct list_head list;
struct list_head page_list;
struct ipc_log_page *first_page;
struct ipc_log_page *last_page;
struct ipc_log_page *write_page;
struct ipc_log_page *read_page;
uint32_t write_avail;
struct dentry *dent;
struct list_head dfunc_info_list;
spinlock_t ipc_log_context_lock;
struct completion read_avail;
};
struct dfunc_info {
struct list_head list;
int type;
void (*dfunc) (struct encode_context *, struct decode_context *);
};
enum {
TSV_TYPE_INVALID,
TSV_TYPE_TIMESTAMP,
TSV_TYPE_POINTER,
TSV_TYPE_INT32,
TSV_TYPE_BYTE_ARRAY,
};
enum {
OUTPUT_DEBUGFS,
};
#define IPC_LOGGING_MAGIC_NUM 0x52784425
#define MIN(x, y) ((x) < (y) ? (x) : (y))
#define IS_MSG_TYPE(x) (((x) > TSV_TYPE_MSG_START) && \
((x) < TSV_TYPE_MSG_END))
#define MAX_MSG_DECODED_SIZE (MAX_MSG_SIZE*4)
extern rwlock_t ipc_log_context_list_lock;
extern int msg_read(struct ipc_log_context *ilctxt,
struct encode_context *ectxt);
static inline int is_ilctxt_empty(struct ipc_log_context *ilctxt)
{
if (!ilctxt)
return -EINVAL;
return ((ilctxt->read_page == ilctxt->write_page) &&
(ilctxt->read_page->hdr.read_offset ==
ilctxt->write_page->hdr.write_offset));
}
#if (defined(CONFIG_DEBUG_FS))
void check_and_create_debugfs(void);
void create_ctx_debugfs(struct ipc_log_context *ctxt,
const char *mod_name);
#else
void check_and_create_debugfs(void)
{
}
void create_ctx_debugfs(struct ipc_log_context *ctxt, const char *mod_name)
{
}
#endif
#endif
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