path: root/include/drm/drmP.h

/*
 * Internal Header for the Direct Rendering Manager
 *
 * Copyright 1999 Precision Insight, Inc., Cedar Park, Texas.
 * Copyright 2000 VA Linux Systems, Inc., Sunnyvale, California.
 * Copyright (c) 2009-2010, Code Aurora Forum.
 * All rights reserved.
 *
 * Author: Rickard E. (Rik) Faith <faith@valinux.com>
 * Author: Gareth Hughes <gareth@valinux.com>
 *
 * 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
 * VA LINUX SYSTEMS AND/OR ITS SUPPLIERS 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 _DRM_P_H_
#define _DRM_P_H_

#include <linux/agp_backend.h>
#include <linux/cdev.h>
#include <linux/dma-mapping.h>
#include <linux/file.h>
#include <linux/fs.h>
#include <linux/highmem.h>
#include <linux/idr.h>
#include <linux/init.h>
#include <linux/io.h>
#include <linux/jiffies.h>
#include <linux/kernel.h>
#include <linux/kref.h>
#include <linux/miscdevice.h>
#include <linux/mm.h>
#include <linux/mutex.h>
#include <linux/pci.h>
#include <linux/platform_device.h>
#include <linux/poll.h>
#include <linux/ratelimit.h>
#include <linux/rbtree.h>
#include <linux/sched.h>
#include <linux/slab.h>
#include <linux/types.h>
#include <linux/vmalloc.h>
#include <linux/workqueue.h>
#include <linux/dma-fence.h>

#include <asm/mman.h>
#include <asm/pgalloc.h>
#include <linux/uaccess.h>

#include <uapi/drm/drm.h>
#include <uapi/drm/drm_mode.h>

#include <drm/drm_agpsupport.h>
#include <drm/drm_crtc.h>
#include <drm/drm_fourcc.h>
#include <drm/drm_global.h>
#include <drm/drm_hashtab.h>
#include <drm/drm_mem_util.h>
#include <drm/drm_mm.h>
#include <drm/drm_os_linux.h>
#include <drm/drm_sarea.h>
#include <drm/drm_vma_manager.h>
#include <drm/drm_drv.h>

struct module;

struct drm_file;
struct drm_device;
struct drm_agp_head;
struct drm_local_map;
struct drm_device_dma;
struct drm_dma_handle;
struct drm_gem_object;
struct drm_master;
struct drm_vblank_crtc;

struct device_node;
struct videomode;
struct reservation_object;
struct dma_buf_attachment;

/*
 * The following categories are defined:
 *
 * CORE: Used in the generic drm code: drm_ioctl.c, drm_mm.c, drm_memory.c, ...
 *	 This is the category used by the DRM_DEBUG() macro.
 *
 * DRIVER: Used in the vendor specific part of the driver: i915, radeon, ...
 *	   This is the category used by the DRM_DEBUG_DRIVER() macro.
 *
 * KMS: used in the modesetting code.
 *	This is the category used by the DRM_DEBUG_KMS() macro.
 *
 * PRIME: used in the prime code.
 *	  This is the category used by the DRM_DEBUG_PRIME() macro.
 *
 * ATOMIC: used in the atomic code.
 *	  This is the category used by the DRM_DEBUG_ATOMIC() macro.
 *
 * VBL: used for verbose debug message in the vblank code
 *	  This is the category used by the DRM_DEBUG_VBL() macro.
 *
 * Enabling verbose debug messages is done through the drm.debug parameter,
 * each category being enabled by a bit.
 *
 * drm.debug=0x1 will enable CORE messages
 * drm.debug=0x2 will enable DRIVER messages
 * drm.debug=0x3 will enable CORE and DRIVER messages
 * ...
 * drm.debug=0x3f will enable all messages
 *
 * An interesting feature is that it's possible to enable verbose logging at
 * run-time by echoing the debug value in its sysfs node:
 *   # echo 0xf > /sys/module/drm/parameters/debug
 */
#define DRM_UT_NONE		0x00
#define DRM_UT_CORE 		0x01
#define DRM_UT_DRIVER		0x02
#define DRM_UT_KMS		0x04
#define DRM_UT_PRIME		0x08
#define DRM_UT_ATOMIC		0x10
#define DRM_UT_VBL		0x20
#define DRM_UT_STATE		0x40

/***********************************************************************/
/** \name DRM template customization defaults */
/*@{*/

/***********************************************************************/
/** \name Macros to make printk easier */
/*@{*/

#define _DRM_PRINTK(once, level, fmt, ...)				\
	do {								\
		printk##once(KERN_##level "[" DRM_NAME "] " fmt,	\
			     ##__VA_ARGS__);				\
	} while (0)

#define DRM_INFO(fmt, ...)						\
	_DRM_PRINTK(, INFO, fmt, ##__VA_ARGS__)
#define DRM_NOTE(fmt, ...)						\
	_DRM_PRINTK(, NOTICE, fmt, ##__VA_ARGS__)
#define DRM_WARN(fmt, ...)						\
	_DRM_PRINTK(, WARNING, fmt, ##__VA_ARGS__)

#define DRM_INFO_ONCE(fmt, ...)						\
	_DRM_PRINTK(_once, INFO, fmt, ##__VA_ARGS__)
#define DRM_NOTE_ONCE(fmt, ...)						\
	_DRM_PRINTK(_once, NOTICE, fmt, ##__VA_ARGS__)
#define DRM_WARN_ONCE(fmt, ...)						\
	_DRM_PRINTK(_once, WARNING, fmt, ##__VA_ARGS__)

/**
 * Error output.
 *
 * \param fmt printf() like format string.
 * \param arg arguments
 */
#define DRM_DEV_ERROR(dev, fmt, ...)					\
	drm_dev_printk(dev, KERN_ERR, DRM_UT_NONE, __func__, " *ERROR*",\
		       fmt, ##__VA_ARGS__)
#define DRM_ERROR(fmt, ...)						\
	drm_printk(KERN_ERR, DRM_UT_NONE, fmt,	##__VA_ARGS__)

/**
 * Rate limited error output.  Like DRM_ERROR() but won't flood the log.
 *
 * \param fmt printf() like format string.
 * \param arg arguments
 */
#define DRM_DEV_ERROR_RATELIMITED(dev, fmt, ...)			\
({									\
	static DEFINE_RATELIMIT_STATE(_rs,				\
				      DEFAULT_RATELIMIT_INTERVAL,	\
				      DEFAULT_RATELIMIT_BURST);		\
									\
	if (__ratelimit(&_rs))						\
		DRM_DEV_ERROR(dev, fmt, ##__VA_ARGS__);			\
})
#define DRM_ERROR_RATELIMITED(fmt, ...)					\
	DRM_DEV_ERROR_RATELIMITED(NULL, fmt, ##__VA_ARGS__)

#define DRM_DEV_INFO(dev, fmt, ...)					\
	drm_dev_printk(dev, KERN_INFO, DRM_UT_NONE, __func__, "", fmt,	\
		       ##__VA_ARGS__)

#define DRM_DEV_INFO_ONCE(dev, fmt, ...)				\
({									\
	static bool __print_once __read_mostly;				\
	if (!__print_once) {						\
		__print_once = true;					\
		DRM_DEV_INFO(dev, fmt, ##__VA_ARGS__);			\
	}								\
})

/**
 * Debug output.
 *
 * \param fmt printf() like format string.
 * \param arg arguments
 */
#define DRM_DEV_DEBUG(dev, fmt, args...)				\
	drm_dev_printk(dev, KERN_DEBUG, DRM_UT_CORE, __func__, "", fmt,	\
		       ##args)
#define DRM_DEBUG(fmt, ...)						\
	drm_printk(KERN_DEBUG, DRM_UT_CORE, fmt, ##__VA_ARGS__)

#define DRM_DEV_DEBUG_DRIVER(dev, fmt, args...)				\
	drm_dev_printk(dev, KERN_DEBUG, DRM_UT_DRIVER, __func__, "",	\
		       fmt, ##args)
#define DRM_DEBUG_DRIVER(fmt, ...)					\
	drm_printk(KERN_DEBUG, DRM_UT_DRIVER, fmt, ##__VA_ARGS__)

#define DRM_DEV_DEBUG_KMS(dev, fmt, args...)				\
	drm_dev_printk(dev, KERN_DEBUG, DRM_UT_KMS, __func__, "", fmt,	\
		       ##args)
#define DRM_DEBUG_KMS(fmt, ...)					\
	drm_printk(KERN_DEBUG, DRM_UT_KMS, fmt, ##__VA_ARGS__)

#define DRM_DEV_DEBUG_PRIME(dev, fmt, args...)				\
	drm_dev_printk(dev, KERN_DEBUG, DRM_UT_PRIME, __func__, "",	\
		       fmt, ##args)
#define DRM_DEBUG_PRIME(fmt, ...)					\
	drm_printk(KERN_DEBUG, DRM_UT_PRIME, fmt, ##__VA_ARGS__)

#define DRM_DEV_DEBUG_ATOMIC(dev, fmt, args...)				\
	drm_dev_printk(dev, KERN_DEBUG, DRM_UT_ATOMIC, __func__, "",	\
		       fmt, ##args)
#define DRM_DEBUG_ATOMIC(fmt, ...)					\
	drm_printk(KERN_DEBUG, DRM_UT_ATOMIC, fmt, ##__VA_ARGS__)

#define DRM_DEV_DEBUG_VBL(dev, fmt, args...)				\
	drm_dev_printk(dev, KERN_DEBUG, DRM_UT_VBL, __func__, "", fmt,	\
		       ##args)
#define DRM_DEBUG_VBL(fmt, ...)					\
	drm_printk(KERN_DEBUG, DRM_UT_VBL, fmt, ##__VA_ARGS__)

#define _DRM_DEV_DEFINE_DEBUG_RATELIMITED(dev, level, fmt, args...)	\
({									\
	static DEFINE_RATELIMIT_STATE(_rs,				\
				      DEFAULT_RATELIMIT_INTERVAL,	\
				      DEFAULT_RATELIMIT_BURST);		\
	if (__ratelimit(&_rs))						\
		drm_dev_printk(dev, KERN_DEBUG, DRM_UT_ ## level,	\
			       __func__, "", fmt, ##args);		\
})

/**
 * Rate limited debug output. Like DRM_DEBUG() but won't flood the log.
 *
 * \param fmt printf() like format string.
 * \param arg arguments
 */
#define DRM_DEV_DEBUG_RATELIMITED(dev, fmt, args...)			\
	DEV__DRM_DEFINE_DEBUG_RATELIMITED(dev, CORE, fmt, ##args)
#define DRM_DEBUG_RATELIMITED(fmt, args...)				\
	DRM_DEV_DEBUG_RATELIMITED(NULL, fmt, ##args)
#define DRM_DEV_DEBUG_DRIVER_RATELIMITED(dev, fmt, args...)		\
	_DRM_DEV_DEFINE_DEBUG_RATELIMITED(dev, DRIVER, fmt, ##args)
#define DRM_DEBUG_DRIVER_RATELIMITED(fmt, args...)			\
	DRM_DEV_DEBUG_DRIVER_RATELIMITED(NULL, fmt, ##args)
#define DRM_DEV_DEBUG_KMS_RATELIMITED(dev, fmt, args...)		\
	_DRM_DEV_DEFINE_DEBUG_RATELIMITED(dev, KMS, fmt, ##args)
#define DRM_DEBUG_KMS_RATELIMITED(fmt, args...)				\
	DRM_DEV_DEBUG_KMS_RATELIMITED(NULL, fmt, ##args)
#define DRM_DEV_DEBUG_PRIME_RATELIMITED(dev, fmt, args...)		\
	_DRM_DEV_DEFINE_DEBUG_RATELIMITED(dev, PRIME, fmt, ##args)
#define DRM_DEBUG_PRIME_RATELIMITED(fmt, args...)			\
	DRM_DEV_DEBUG_PRIME_RATELIMITED(NULL, fmt, ##args)

/* Format strings and argument splitters to simplify printing
 * various "complex" objects
 */
#define DRM_MODE_FMT    "%d:\"%s\" %d %d %d %d %d %d %d %d %d %d 0x%x 0x%x"
#define DRM_MODE_ARG(m) \
	(m)->base.id, (m)->name, (m)->vrefresh, (m)->clock, \
	(m)->hdisplay, (m)->hsync_start, (m)->hsync_end, (m)->htotal, \
	(m)->vdisplay, (m)->vsync_start, (m)->vsync_end, (m)->vtotal, \
	(m)->type, (m)->flags

#define DRM_RECT_FMT    "%dx%d%+d%+d"
#define DRM_RECT_ARG(r) drm_rect_width(r), drm_rect_height(r), (r)->x1, (r)->y1

/* for rect's in fixed-point format: */
#define DRM_RECT_FP_FMT "%d.%06ux%d.%06u%+d.%06u%+d.%06u"
#define DRM_RECT_FP_ARG(r) \
		drm_rect_width(r) >> 16, ((drm_rect_width(r) & 0xffff) * 15625) >> 10, \
		drm_rect_height(r) >> 16, ((drm_rect_height(r) & 0xffff) * 15625) >> 10, \
		(r)->x1 >> 16, (((r)->x1 & 0xffff) * 15625) >> 10, \
		(r)->y1 >> 16, (((r)->y1 & 0xffff) * 15625) >> 10

/*@}*/

/***********************************************************************/
/** \name Internal types and structures */
/*@{*/

#define DRM_IF_VERSION(maj, min) (maj << 16 | min)

/**
 * Ioctl function type.
 *
 * \param inode device inode.
 * \param file_priv DRM file private pointer.
 * \param cmd command.
 * \param arg argument.
 */
typedef int drm_ioctl_t(struct drm_device *dev, void *data,
			struct drm_file *file_priv);

typedef int drm_ioctl_compat_t(struct file *filp, unsigned int cmd,
			       unsigned long arg);

#define DRM_IOCTL_NR(n)                _IOC_NR(n)
#define DRM_MAJOR       226

#define DRM_AUTH	0x1
#define	DRM_MASTER	0x2
#define DRM_ROOT_ONLY	0x4
#define DRM_CONTROL_ALLOW 0x8
#define DRM_UNLOCKED	0x10
#define DRM_RENDER_ALLOW 0x20

struct drm_ioctl_desc {
	unsigned int cmd;
	int flags;
	drm_ioctl_t *func;
	const char *name;
};

/**
 * Creates a driver or general drm_ioctl_desc array entry for the given
 * ioctl, for use by drm_ioctl().
 */

#define DRM_IOCTL_DEF_DRV(ioctl, _func, _flags)				\
	[DRM_IOCTL_NR(DRM_IOCTL_##ioctl) - DRM_COMMAND_BASE] = {	\
		.cmd = DRM_IOCTL_##ioctl,				\
		.func = _func,						\
		.flags = _flags,					\
		.name = #ioctl						\
	 }

/* Event queued up for userspace to read */
struct drm_pending_event {
	struct completion *completion;
	struct drm_event *event;
	struct dma_fence *fence;
	struct list_head link;
	struct list_head pending_link;
	struct drm_file *file_priv;
	pid_t pid; /* pid of requester, no guarantee it's valid by the time
		      we deliver the event, for tracing only */
};

struct drm_prime_file_private {
	struct mutex lock;
	struct rb_root dmabufs;
	struct rb_root handles;
};

/** File private data */
struct drm_file {
	unsigned authenticated :1;
	/* true when the client has asked us to expose stereo 3D mode flags */
	unsigned stereo_allowed :1;
	/*
	 * true if client understands CRTC primary planes and cursor planes
	 * in the plane list
	 */
	unsigned universal_planes:1;
	/* true if client understands atomic properties */
	unsigned atomic:1;