/*
 * Copyright © 2013 Intel Corporation
 *
 * Permission is hereby granted, free of charge, to any person obtaining a
 * copy of this software and associated documentation files (the "Software"),
 * to deal in the Software without restriction, including without limitation
 * the rights to use, copy, modify, merge, publish, distribute, sublicense,
 * and/or sell copies of the Software, and to permit persons to whom the
 * Software is furnished to do so, subject to the following conditions:
 *
 * The above copyright notice and this permission notice (including the next
 * paragraph) shall be included in all copies or substantial portions of the
 * Software.
 *
 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
 * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
 * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.  IN NO EVENT SHALL
 * THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
 * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
 * FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS
 * IN THE SOFTWARE.
 *
 */

#ifndef __IGT_DEBUGFS_H__
#define __IGT_DEBUGFS_H__

#include <stdbool.h>
#include <stdint.h>
#include <stdio.h>

enum pipe;

const char *igt_debugfs_mount(void);
char *igt_debugfs_path(int device, char *path, int pathlen);

int igt_debugfs_dir(int device);
int igt_debugfs_connector_dir(int device, char *conn_name, int mode);
int igt_debugfs_pipe_dir(int device, int pipe, int mode);

int igt_debugfs_open(int fd, const char *filename, int mode);
bool igt_debugfs_is_dir(int drm_fd, const char *name, int gt_id);
bool igt_debugfs_exists(int fd, const char *filename, int mode);
void __igt_debugfs_read(int fd, const char *filename, char *buf, int size);
void __igt_debugfs_write(int fd, const char *filename, const char *buf, int size);
int igt_debugfs_simple_read(int dir, const char *filename, char *buf, int size);
bool igt_debugfs_search(int fd, const char *filename, const char *substring);

int igt_debugfs_gt_dir(int device, unsigned int gt);
int igt_debugfs_gt_open(int device, unsigned int gt, const char *filename,
			int mode);

/**
 * igt_debugfs_read:
 * @filename: name of the debugfs file
 * @buf: buffer where the contents will be stored, allocated by the caller.
 *
 * This is just a convenience wrapper for __igt_debugfs_read. See its
 * documentation.
 */
#define igt_debugfs_read(fd, filename, buf) \
		__igt_debugfs_read(fd, (filename), (buf), sizeof(buf))

/**
 * igt_debugfs_write:
 * @fd: the drm device file fd
 * @filename: name of the debugfs file
 * @buf: buffer to be written to the debugfs file
 *
 * This is just a convenience wrapper for __igt_debugfs_write. See its
 * documentation.
 */
#define igt_debugfs_write(fd, filename, buf) \
		__igt_debugfs_write(fd, (filename), (buf), sizeof(buf))

void igt_hpd_storm_set_threshold(int fd, unsigned int threshold);
void igt_hpd_storm_reset(int fd);
bool igt_hpd_storm_detected(int fd);
void igt_require_hpd_storm_ctl(int fd);
bool igt_ignore_long_hpd(int fd, bool enable);

/*
 * Drop caches
 */

/**
 * DROP_UNBOUND:
 *
 * Drop all currently unbound gem buffer objects from the cache.
 */
#define DROP_UNBOUND 0x1
/**
 * DROP_BOUND:
 *
 * Drop all inactive objects which are bound into some gpu address space.
 */
#define DROP_BOUND 0x2
/**
 * DROP_RETIRE:
 *
 * Wait for all outstanding gpu commands to complete, but do not take any
 * further actions.
 */
#define DROP_RETIRE 0x4
/**
 * DROP_ACTIVE:
 *
 * Also drop active objects once retired.
 */
#define DROP_ACTIVE 0x8
/**
 * DROP_FREED:
 *
 * Also drop freed objects.
 */
#define DROP_FREED 0x10
/**
 * DROP_SHRINK_ALL:
 *
 * Force all unpinned buffers to be evicted from their GTT and returned to the
 * system.
 */
#define DROP_SHRINK_ALL 0x20
/**
 * DROP_IDLE:
 *
 * Flush the driver's idle_worker, releasing internal caches and wakerefs.
 */
#define DROP_IDLE 0x40
/**
 * DROP_RESET_ACTIVE:
 *
 * Cancel all outstanding requests by forcing a gpu reset
 */
#define DROP_RESET_ACTIVE 0x80
/**
 * DROP_RESET_SEQNO:
 *
 * Reset the global request seqno counter back to 0
 */
#define DROP_RESET_SEQNO 0x100
/**
 * DROP_RCU:
 *
 * Performs rcu_barrier() and waits for an RCU grace period to complete,
 * which will flush any RCU callbacks and deferred tasks.
 */
#define DROP_RCU 0x200
/**
 * DROP_ALL:
 *
 * All of the above DROP_ flags combined.
 */
#define DROP_ALL (DROP_UNBOUND | \
		  DROP_BOUND | \
		  DROP_SHRINK_ALL | \
		  DROP_RETIRE | \
		  DROP_ACTIVE | \
		  DROP_FREED | \
		  DROP_IDLE)

void igt_reset_fifo_underrun_reporting(int drm_fd);

bool igt_drop_caches_has(int fd, uint64_t val);
void igt_drop_caches_set(int fd, uint64_t val);

static inline void rcu_barrier(int fd)
{
	igt_drop_caches_set(fd, DROP_RCU);
}

/*
 * Put the driver into a stable (quiescent) state and get the current number of
 * gem buffer objects
 */
int igt_get_stable_obj_count(int driver);
void __igt_debugfs_dump(int device, const char *filename, int level);
#define igt_debugfs_dump(d, f) __igt_debugfs_dump(d, f, IGT_LOG_DEBUG)

#endif /* __IGT_DEBUGFS_H__ */