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/*
* Copyright (c) 2017, 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 __MMC_RING_BUFFER__
#define __MMC_RING_BUFFER__
#include <linux/mmc/card.h>
#include <linux/smp.h>
#include "core.h"
#define MMC_TRACE_RBUF_SZ_ORDER 2 /* 2^2 pages */
#define MMC_TRACE_RBUF_SZ (PAGE_SIZE * (1 << MMC_TRACE_RBUF_SZ_ORDER))
#define MMC_TRACE_EVENT_SZ 256
#define MMC_TRACE_RBUF_NUM_EVENTS (MMC_TRACE_RBUF_SZ / MMC_TRACE_EVENT_SZ)
struct mmc_host;
struct mmc_trace_buffer {
int wr_idx;
bool stop_tracing;
spinlock_t trace_lock;
char *data;
};
#ifdef CONFIG_MMC_RING_BUFFER
void mmc_stop_tracing(struct mmc_host *mmc);
void mmc_trace_write(struct mmc_host *mmc, const char *fmt, ...);
void mmc_trace_init(struct mmc_host *mmc);
void mmc_trace_free(struct mmc_host *mmc);
void mmc_dump_trace_buffer(struct mmc_host *mmc, struct seq_file *s);
#else
static inline void mmc_stop_tracing(struct mmc_host *mmc) {}
static inline void mmc_trace_write(struct mmc_host *mmc,
const char *fmt, ...) {}
static inline void mmc_trace_init(struct mmc_host *mmc) {}
static inline void mmc_trace_free(struct mmc_host *mmc) {}
static inline void mmc_dump_trace_buffer(struct mmc_host *mmc,
struct seq_file *s) {}
#endif
#define MMC_TRACE(mmc, fmt, ...) \
mmc_trace_write(mmc, fmt, ##__VA_ARGS__)
#endif /* __MMC_RING_BUFFER__ */
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