drmP.h 55.2 KB
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/**
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 * \file drmP.h
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 * Private header for Direct Rendering Manager
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 *
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 * \author Rickard E. (Rik) Faith <faith@valinux.com>
 * \author Gareth Hughes <gareth@valinux.com>
 */

/*
 * Copyright 1999 Precision Insight, Inc., Cedar Park, Texas.
 * Copyright 2000 VA Linux Systems, Inc., Sunnyvale, California.
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 * Copyright (c) 2009-2010, Code Aurora Forum.
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 * All rights reserved.
 *
 * 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_

#ifdef __KERNEL__
#ifdef __alpha__
/* add include of current.h so that "current" is defined
 * before static inline funcs in wait.h. Doing this so we
 * can build the DRM (part of PI DRI). 4/21/2000 S + B */
#include <asm/current.h>
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#endif				/* __alpha__ */
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#include <linux/kernel.h>
#include <linux/miscdevice.h>
#include <linux/fs.h>
#include <linux/init.h>
#include <linux/file.h>
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#include <linux/platform_device.h>
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#include <linux/pci.h>
#include <linux/jiffies.h>
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#include <linux/dma-mapping.h>
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#include <linux/mm.h>
#include <linux/cdev.h>
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#include <linux/mutex.h>
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#include <linux/io.h>
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#include <linux/slab.h>
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#include <linux/ratelimit.h>
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#if defined(__alpha__) || defined(__powerpc__)
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#include <asm/pgtable.h>	/* For pte_wrprotect */
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#endif
#include <asm/mman.h>
#include <asm/uaccess.h>
#include <linux/types.h>
#include <linux/agp_backend.h>
#include <linux/workqueue.h>
#include <linux/poll.h>
#include <asm/pgalloc.h>
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#include <drm/drm.h>
#include <drm/drm_sarea.h>
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#include <drm/drm_vma_manager.h>
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#include <linux/idr.h>

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#define __OS_HAS_AGP (defined(CONFIG_AGP) || (defined(CONFIG_AGP_MODULE) && defined(MODULE)))

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struct module;

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struct drm_file;
struct drm_device;

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struct device_node;
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struct videomode;

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#include <drm/drm_os_linux.h>
#include <drm/drm_hashtab.h>
#include <drm/drm_mm.h>
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#define DRM_UT_CORE 		0x01
#define DRM_UT_DRIVER		0x02
#define DRM_UT_KMS		0x04
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#define DRM_UT_PRIME		0x08
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/*
 * Three debug levels are defined.
 * drm_core, drm_driver, drm_kms
 * drm_core level can be used in the generic drm code. For example:
 * 	drm_ioctl, drm_mm, drm_memory
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 * The macro definition of DRM_DEBUG is used.
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 * 	DRM_DEBUG(fmt, args...)
 * 	The debug info by using the DRM_DEBUG can be obtained by adding
 * 	the boot option of "drm.debug=1".
 *
 * drm_driver level can be used in the specific drm driver. It is used
 * to add the debug info related with the drm driver. For example:
 * i915_drv, i915_dma, i915_gem, radeon_drv,
 * 	The macro definition of DRM_DEBUG_DRIVER can be used.
 * 	DRM_DEBUG_DRIVER(fmt, args...)
 * 	The debug info by using the DRM_DEBUG_DRIVER can be obtained by
 * 	adding the boot option of "drm.debug=0x02"
 *
 * drm_kms level can be used in the KMS code related with specific drm driver.
 * It is used to add the debug info related with KMS mode. For example:
 * the connector/crtc ,
 * 	The macro definition of DRM_DEBUG_KMS can be used.
 * 	DRM_DEBUG_KMS(fmt, args...)
 * 	The debug info by using the DRM_DEBUG_KMS can be obtained by
 * 	adding the boot option of "drm.debug=0x04"
 *
 * If we add the boot option of "drm.debug=0x06", we can get the debug info by
 * using the DRM_DEBUG_KMS and DRM_DEBUG_DRIVER.
 * If we add the boot option of "drm.debug=0x05", we can get the debug info by
 * using the DRM_DEBUG_KMS and DRM_DEBUG.
 */
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extern __printf(4, 5)
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void drm_ut_debug_printk(unsigned int request_level,
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			 const char *prefix,
			 const char *function_name,
			 const char *format, ...);
extern __printf(2, 3)
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int drm_err(const char *func, const char *format, ...);

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

/* driver capabilities and requirements mask */
#define DRIVER_USE_AGP     0x1
#define DRIVER_PCI_DMA     0x8
#define DRIVER_SG          0x10
#define DRIVER_HAVE_DMA    0x20
#define DRIVER_HAVE_IRQ    0x40
#define DRIVER_IRQ_SHARED  0x80
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#define DRIVER_GEM         0x1000
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#define DRIVER_MODESET     0x2000
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#define DRIVER_PRIME       0x4000
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#define DRIVER_RENDER      0x8000
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#define DRIVER_BUS_PCI 0x1
#define DRIVER_BUS_PLATFORM 0x2
#define DRIVER_BUS_USB 0x3
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#define DRIVER_BUS_HOST1X 0x4
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/***********************************************************************/
/** \name Begin the DRM... */
/*@{*/

#define DRM_DEBUG_CODE 2	  /**< Include debugging code if > 1, then
				     also include looping detection. */

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#define DRM_MAGIC_HASH_ORDER  4  /**< Size of key hash table. Must be power of 2. */
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#define DRM_KERNEL_CONTEXT    0	 /**< Change drm_resctx if changed */
#define DRM_RESERVED_CONTEXTS 1	 /**< Change drm_resctx if changed */

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#define DRM_MAP_HASH_OFFSET 0x10000000
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/*@}*/
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/***********************************************************************/
/** \name Macros to make printk easier */
/*@{*/

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

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#define DRM_INFO(fmt, ...)				\
	printk(KERN_INFO "[" DRM_NAME "] " fmt, ##__VA_ARGS__)
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/**
 * Debug output.
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 *
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 * \param fmt printf() like format string.
 * \param arg arguments
 */
#if DRM_DEBUG_CODE
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#define DRM_DEBUG(fmt, args...)						\
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	do {								\
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		drm_ut_debug_printk(DRM_UT_CORE, DRM_NAME, 		\
					__func__, fmt, ##args);		\
	} while (0)

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#define DRM_DEBUG_DRIVER(fmt, args...)					\
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	do {								\
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		drm_ut_debug_printk(DRM_UT_DRIVER, DRM_NAME,		\
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					__func__, fmt, ##args);		\
	} while (0)
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#define DRM_DEBUG_KMS(fmt, args...)				\
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	do {								\
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		drm_ut_debug_printk(DRM_UT_KMS, DRM_NAME, 		\
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					 __func__, fmt, ##args);	\
	} while (0)
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#define DRM_DEBUG_PRIME(fmt, args...)					\
	do {								\
		drm_ut_debug_printk(DRM_UT_PRIME, DRM_NAME,		\
					__func__, fmt, ##args);		\
	} while (0)
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#define DRM_LOG(fmt, args...)						\
	do {								\
		drm_ut_debug_printk(DRM_UT_CORE, NULL,			\
					NULL, fmt, ##args);		\
	} while (0)
#define DRM_LOG_KMS(fmt, args...)					\
	do {								\
		drm_ut_debug_printk(DRM_UT_KMS, NULL,			\
					NULL, fmt, ##args);		\
	} while (0)
#define DRM_LOG_MODE(fmt, args...)					\
	do {								\
		drm_ut_debug_printk(DRM_UT_MODE, NULL,			\
					NULL, fmt, ##args);		\
	} while (0)
#define DRM_LOG_DRIVER(fmt, args...)					\
	do {								\
		drm_ut_debug_printk(DRM_UT_DRIVER, NULL,		\
					NULL, fmt, ##args);		\
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	} while (0)
#else
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#define DRM_DEBUG_DRIVER(fmt, args...) do { } while (0)
#define DRM_DEBUG_KMS(fmt, args...)	do { } while (0)
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#define DRM_DEBUG_PRIME(fmt, args...)	do { } while (0)
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#define DRM_DEBUG(fmt, arg...)		 do { } while (0)
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#define DRM_LOG(fmt, arg...)		do { } while (0)
#define DRM_LOG_KMS(fmt, args...) do { } while (0)
#define DRM_LOG_MODE(fmt, arg...) do { } while (0)
#define DRM_LOG_DRIVER(fmt, arg...) do { } while (0)

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#endif

/*@}*/

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

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#define DRM_ARRAY_SIZE(x) ARRAY_SIZE(x)
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#define DRM_IF_VERSION(maj, min) (maj << 16 | min)

/**
 * Test that the hardware lock is held by the caller, returning otherwise.
 *
 * \param dev DRM device.
 * \param filp file pointer of the caller.
 */
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#define LOCK_TEST_WITH_RETURN( dev, _file_priv )				\
do {										\
	if (!_DRM_LOCK_IS_HELD(_file_priv->master->lock.hw_lock->lock) ||	\
	    _file_priv->master->lock.file_priv != _file_priv)	{		\
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		DRM_ERROR( "%s called without lock held, held  %d owner %p %p\n",\
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			   __func__, _DRM_LOCK_IS_HELD(_file_priv->master->lock.hw_lock->lock),\
			   _file_priv->master->lock.file_priv, _file_priv);	\
		return -EINVAL;							\
	}									\
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} while (0)

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

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

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#define DRM_AUTH	0x1
#define	DRM_MASTER	0x2
#define DRM_ROOT_ONLY	0x4
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#define DRM_CONTROL_ALLOW 0x8
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#define DRM_UNLOCKED	0x10
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#define DRM_RENDER_ALLOW 0x20
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struct drm_ioctl_desc {
	unsigned int cmd;
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	int flags;
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	drm_ioctl_t *func;
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	unsigned int cmd_drv;
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	const char *name;
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};

/**
 * Creates a driver or general drm_ioctl_desc array entry for the given
 * ioctl, for use by drm_ioctl().
 */
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#define DRM_IOCTL_DEF_DRV(ioctl, _func, _flags)			\
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	[DRM_IOCTL_NR(DRM_##ioctl)] = {.cmd = DRM_##ioctl, .func = _func, .flags = _flags, .cmd_drv = DRM_IOCTL_##ioctl, .name = #ioctl}
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struct drm_magic_entry {
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	struct list_head head;
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	struct drm_hash_item hash_item;
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	struct drm_file *priv;
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};
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struct drm_vma_entry {
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	struct list_head head;
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	struct vm_area_struct *vma;
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	pid_t pid;
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};
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/**
 * DMA buffer.
 */
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struct drm_buf {
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	int idx;		       /**< Index into master buflist */
	int total;		       /**< Buffer size */
	int order;		       /**< log-base-2(total) */
	int used;		       /**< Amount of buffer in use (for DMA) */
	unsigned long offset;	       /**< Byte offset (used internally) */
	void *address;		       /**< Address of buffer */
	unsigned long bus_address;     /**< Bus address of buffer */
	struct drm_buf *next;	       /**< Kernel-only: used for free list */
	__volatile__ int waiting;      /**< On kernel DMA queue */
	__volatile__ int pending;      /**< On hardware DMA queue */
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	struct drm_file *file_priv;    /**< Private of holding file descr */
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	int context;		       /**< Kernel queue for this buffer */
	int while_locked;	       /**< Dispatch this buffer while locked */
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	enum {
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		DRM_LIST_NONE = 0,
		DRM_LIST_FREE = 1,
		DRM_LIST_WAIT = 2,
		DRM_LIST_PEND = 3,
		DRM_LIST_PRIO = 4,
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		DRM_LIST_RECLAIM = 5
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	} list;			       /**< Which list we're on */
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	int dev_priv_size;		 /**< Size of buffer private storage */
	void *dev_private;		 /**< Per-buffer private storage */
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};
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/** bufs is one longer than it has to be */
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struct drm_waitlist {
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	int count;			/**< Number of possible buffers */
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	struct drm_buf **bufs;		/**< List of pointers to buffers */
	struct drm_buf **rp;			/**< Read pointer */
	struct drm_buf **wp;			/**< Write pointer */
	struct drm_buf **end;		/**< End pointer */
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	spinlock_t read_lock;
	spinlock_t write_lock;
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};
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struct drm_freelist {
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	int initialized;	       /**< Freelist in use */
	atomic_t count;		       /**< Number of free buffers */
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	struct drm_buf *next;	       /**< End pointer */
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	wait_queue_head_t waiting;     /**< Processes waiting on free bufs */
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	int low_mark;		       /**< Low water mark */
	int high_mark;		       /**< High water mark */
	atomic_t wfh;		       /**< If waiting for high mark */
	spinlock_t lock;
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};
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typedef struct drm_dma_handle {
	dma_addr_t busaddr;
	void *vaddr;
	size_t size;
} drm_dma_handle_t;

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/**
 * Buffer entry.  There is one of this for each buffer size order.
 */
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struct drm_buf_entry {
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	int buf_size;			/**< size */
	int buf_count;			/**< number of buffers */
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	struct drm_buf *buflist;		/**< buffer list */
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	int seg_count;
	int page_order;
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	struct drm_dma_handle **seglist;
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	struct drm_freelist freelist;
};
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/* Event queued up for userspace to read */
struct drm_pending_event {
	struct drm_event *event;
	struct list_head link;
	struct drm_file *file_priv;
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	pid_t pid; /* pid of requester, no guarantee it's valid by the time
		      we deliver the event, for tracing only */
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	void (*destroy)(struct drm_pending_event *event);
};

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/* initial implementaton using a linked list - todo hashtab */
struct drm_prime_file_private {
	struct list_head head;
	struct mutex lock;
};

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/** File private data */
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struct drm_file {
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	unsigned always_authenticated :1;
	unsigned authenticated :1;
	unsigned is_master :1; /* this file private is a master for a minor */
	/* true when the client has asked us to expose stereo 3D mode flags */
	unsigned stereo_allowed :1;

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	struct pid *pid;
	kuid_t uid;
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	drm_magic_t magic;
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	struct list_head lhead;
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	struct drm_minor *minor;
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	unsigned long lock_count;
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	/** Mapping of mm object handles to object pointers. */
	struct idr object_idr;
	/** Lock for synchronization of access to object_idr. */
	spinlock_t table_lock;
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	struct file *filp;
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	void *driver_priv;
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	struct drm_master *master; /* master this node is currently associated with
				      N.B. not always minor->master */
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	/**
	 * fbs - List of framebuffers associated with this file.
	 *
	 * Protected by fbs_lock. Note that the fbs list holds a reference on
	 * the fb object to prevent it from untimely disappearing.
	 */
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	struct list_head fbs;
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	struct mutex fbs_lock;
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	wait_queue_head_t event_wait;
	struct list_head event_list;
	int event_space;
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	struct drm_prime_file_private prime;
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};
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/** Wait queue */
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struct drm_queue {
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	atomic_t use_count;		/**< Outstanding uses (+1) */
	atomic_t finalization;		/**< Finalization in progress */
	atomic_t block_count;		/**< Count of processes waiting */
	atomic_t block_read;		/**< Queue blocked for reads */
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	wait_queue_head_t read_queue;	/**< Processes waiting on block_read */
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	atomic_t block_write;		/**< Queue blocked for writes */
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	wait_queue_head_t write_queue;	/**< Processes waiting on block_write */
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	atomic_t total_queued;		/**< Total queued statistic */
	atomic_t total_flushed;		/**< Total flushes statistic */
	atomic_t total_locks;		/**< Total locks statistics */
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	enum drm_ctx_flags flags;	/**< Context preserving and 2D-only */
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	struct drm_waitlist waitlist;	/**< Pending buffers */
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	wait_queue_head_t flush_queue;	/**< Processes waiting until flush */
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};
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/**
 * Lock data.
 */
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struct drm_lock_data {
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	struct drm_hw_lock *hw_lock;	/**< Hardware lock */
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	/** Private of lock holder's file (NULL=kernel) */
	struct drm_file *file_priv;
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	wait_queue_head_t lock_queue;	/**< Queue of blocked processes */
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	unsigned long lock_time;	/**< Time of last lock in jiffies */
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	spinlock_t spinlock;
	uint32_t kernel_waiters;
	uint32_t user_waiters;
	int idle_has_lock;
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};
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/**
 * DMA data.
 */
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struct drm_device_dma {
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	struct drm_buf_entry bufs[DRM_MAX_ORDER + 1];	/**< buffers, grouped by their size order */
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	int buf_count;			/**< total number of buffers */
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	struct drm_buf **buflist;		/**< Vector of pointers into drm_device_dma::bufs */
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	int seg_count;
	int page_count;			/**< number of pages */
	unsigned long *pagelist;	/**< page list */
	unsigned long byte_count;
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	enum {
		_DRM_DMA_USE_AGP = 0x01,
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		_DRM_DMA_USE_SG = 0x02,
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		_DRM_DMA_USE_FB = 0x04,
		_DRM_DMA_USE_PCI_RO = 0x08
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	} flags;

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};
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/**
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 * AGP memory entry.  Stored as a doubly linked list.
 */
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struct drm_agp_mem {
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	unsigned long handle;		/**< handle */
529
	struct agp_memory *memory;
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	unsigned long bound;		/**< address */
	int pages;
532
	struct list_head head;
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};
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/**
 * AGP data.
 *
 * \sa drm_agp_init() and drm_device::agp.
 */
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struct drm_agp_head {
541
	struct agp_kern_info agp_info;		/**< AGP device information */
542
	struct list_head memory;
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	unsigned long mode;		/**< AGP mode */
	struct agp_bridge_data *bridge;
	int enabled;			/**< whether the AGP bus as been enabled */
	int acquired;			/**< whether the AGP device has been acquired */
	unsigned long base;
	int agp_mtrr;
	int cant_use_aperture;
	unsigned long page_mask;
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};
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/**
 * Scatter-gather memory.
 */
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struct drm_sg_mem {
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	unsigned long handle;
	void *virtual;
	int pages;
	struct page **pagelist;
	dma_addr_t *busaddr;
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};
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struct drm_sigdata {
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	int context;
566
	struct drm_hw_lock *lock;
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};
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/**
 * Kernel side of a mapping
 */
struct drm_local_map {
574
	resource_size_t offset;	 /**< Requested physical address (0 for SAREA)*/
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	unsigned long size;	 /**< Requested physical size (bytes) */
	enum drm_map_type type;	 /**< Type of memory to map */
	enum drm_map_flags flags;	 /**< Flags */
	void *handle;		 /**< User-space: "Handle" to pass to mmap() */
				 /**< Kernel-space: kernel-virtual address */
	int mtrr;		 /**< MTRR slot used */
};

typedef struct drm_local_map drm_local_map_t;

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/**
 * Mappings list
 */
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struct drm_map_list {
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	struct list_head head;		/**< list head */
590
	struct drm_hash_item hash;
591
	struct drm_local_map *map;	/**< mapping */
592
	uint64_t user_token;
593
	struct drm_master *master;
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};
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/**
 * Context handle list
 */
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struct drm_ctx_list {
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	struct list_head head;		/**< list head */
	drm_context_t handle;		/**< context handle */
602
	struct drm_file *tag;		/**< associated fd private data */
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};
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/* location of GART table */
#define DRM_ATI_GART_MAIN 1
#define DRM_ATI_GART_FB   2

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#define DRM_ATI_GART_PCI 1
#define DRM_ATI_GART_PCIE 2
#define DRM_ATI_GART_IGP 3

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struct drm_ati_pcigart_info {
614
	int gart_table_location;
615
	int gart_reg_if;
616
	void *addr;
617
	dma_addr_t bus_addr;
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	dma_addr_t table_mask;
	struct drm_dma_handle *table_handle;
620
	struct drm_local_map mapping;
621
	int table_size;
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};
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/**
 * This structure defines the drm_mm memory object, which will be used by the
 * DRM for its buffer objects.
 */
struct drm_gem_object {
	/** Reference count of this object */
	struct kref refcount;

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	/**
	 * handle_count - gem file_priv handle count of this object
	 *
	 * Each handle also holds a reference. Note that when the handle_count
	 * drops to 0 any global names (e.g. the id in the flink namespace) will
	 * be cleared.
	 *
	 * Protected by dev->object_name_lock.
	 * */
	unsigned handle_count;
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	/** Related drm device */
	struct drm_device *dev;

	/** File representing the shmem storage */
	struct file *filp;

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	/* Mapping info for this object */
650
	struct drm_vma_offset_node vma_node;
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	/**
	 * Size of the object, in bytes.  Immutable over the object's
	 * lifetime.
	 */
	size_t size;

	/**
	 * Global name for this object, starts at 1. 0 means unnamed.
	 * Access is covered by the object_name_lock in the related drm_device
	 */
	int name;

	/**
	 * Memory domains. These monitor which caches contain read/write data
	 * related to the object. When transitioning from one set of domains
	 * to another, the driver is called to ensure that caches are suitably
	 * flushed and invalidated
	 */
	uint32_t read_domains;
	uint32_t write_domain;

	/**
	 * While validating an exec operation, the
	 * new read/write domain values are computed here.
	 * They will be transferred to the above values
	 * at the point that any cache flushing occurs
	 */
	uint32_t pending_read_domains;
	uint32_t pending_write_domain;

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	/**
	 * dma_buf - dma buf associated with this GEM object
	 *
	 * Pointer to the dma-buf associated with this gem object (either
	 * through importing or exporting). We break the resulting reference
	 * loop when the last gem handle for this object is released.
	 *
	 * Protected by obj->object_name_lock
	 */
	struct dma_buf *dma_buf;
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	/**
	 * import_attach - dma buf attachment backing this object
	 *
	 * Any foreign dma_buf imported as a gem object has this set to the
	 * attachment point for the device. This is invariant over the lifetime
	 * of a gem object.
	 *
	 * The driver's ->gem_free_object callback is responsible for cleaning
	 * up the dma_buf attachment and references acquired at import time.
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	 *
	 * Note that the drm gem/prime core does not depend upon drivers setting
	 * this field any more. So for drivers where this doesn't make sense
	 * (e.g. virtual devices or a displaylink behind an usb bus) they can
	 * simply leave it as NULL.
707
	 */
708
	struct dma_buf_attachment *import_attach;
709 710
};

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#include <drm/drm_crtc.h>
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/* per-master structure */
struct drm_master {

	struct kref refcount; /* refcount for this master */

	struct list_head head; /**< each minor contains a list of masters */
	struct drm_minor *minor; /**< link back to minor we are a master for */

	char *unique;			/**< Unique identifier: e.g., busid */
	int unique_len;			/**< Length of unique field */
723
	int unique_size;		/**< amount allocated */
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	int blocked;			/**< Blocked due to VC switch? */

	/** \name Authentication */
	/*@{ */
	struct drm_open_hash magiclist;
	struct list_head magicfree;
	/*@} */

	struct drm_lock_data lock;	/**< Information on hardware lock */

	void *driver_priv; /**< Private structure for driver to use */
};

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/* Size of ringbuffer for vblank timestamps. Just double-buffer
 * in initial implementation.
 */
#define DRM_VBLANKTIME_RBSIZE 2

/* Flags and return codes for get_vblank_timestamp() driver function. */
#define DRM_CALLED_FROM_VBLIRQ 1
#define DRM_VBLANKTIME_SCANOUTPOS_METHOD (1 << 0)
#define DRM_VBLANKTIME_INVBL             (1 << 1)

/* get_scanout_position() return flags */
#define DRM_SCANOUTPOS_VALID        (1 << 0)
#define DRM_SCANOUTPOS_INVBL        (1 << 1)
#define DRM_SCANOUTPOS_ACCURATE     (1 << 2)

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struct drm_bus {
	int bus_type;
	int (*get_irq)(struct drm_device *dev);
	const char *(*get_name)(struct drm_device *dev);
	int (*set_busid)(struct drm_device *dev, struct drm_master *master);
	int (*set_unique)(struct drm_device *dev, struct drm_master *master,
			  struct drm_unique *unique);
	int (*irq_by_busid)(struct drm_device *dev, struct drm_irq_busid *p);
};

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/**
 * DRM driver structure. This structure represent the common code for
 * a family of cards. There will one drm_device for each card present
 * in this family
 */
struct drm_driver {
769 770
	int (*load) (struct drm_device *, unsigned long flags);
	int (*firstopen) (struct drm_device *);
771
	int (*open) (struct drm_device *, struct drm_file *);
772
	void (*preclose) (struct drm_device *, struct drm_file *file_priv);
773
	void (*postclose) (struct drm_device *, struct drm_file *);
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	void (*lastclose) (struct drm_device *);
	int (*unload) (struct drm_device *);
776
	int (*suspend) (struct drm_device *, pm_message_t state);
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	int (*resume) (struct drm_device *);
778
	int (*dma_ioctl) (struct drm_device *dev, void *data, struct drm_file *file_priv);
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	int (*dma_quiescent) (struct drm_device *);
780
	int (*context_dtor) (struct drm_device *dev, int context);
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	/**
	 * get_vblank_counter - get raw hardware vblank counter
	 * @dev: DRM device
	 * @crtc: counter to fetch
	 *
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	 * Driver callback for fetching a raw hardware vblank counter for @crtc.
	 * If a device doesn't have a hardware counter, the driver can simply
	 * return the value of drm_vblank_count. The DRM core will account for
	 * missed vblank events while interrupts where disabled based on system
	 * timestamps.
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	 *
	 * Wraparound handling and loss of events due to modesetting is dealt
	 * with in the DRM core code.
	 *
	 * RETURNS
	 * Raw vblank counter value.
	 */
	u32 (*get_vblank_counter) (struct drm_device *dev, int crtc);

	/**
	 * enable_vblank - enable vblank interrupt events
	 * @dev: DRM device
	 * @crtc: which irq to enable
	 *
	 * Enable vblank interrupts for @crtc.  If the device doesn't have
	 * a hardware vblank counter, this routine should be a no-op, since
	 * interrupts will have to stay on to keep the count accurate.
	 *
	 * RETURNS
	 * Zero on success, appropriate errno if the given @crtc's vblank
	 * interrupt cannot be enabled.
	 */
	int (*enable_vblank) (struct drm_device *dev, int crtc);

	/**
	 * disable_vblank - disable vblank interrupt events
	 * @dev: DRM device
	 * @crtc: which irq to enable
	 *
	 * Disable vblank interrupts for @crtc.  If the device doesn't have
	 * a hardware vblank counter, this routine should be a no-op, since
	 * interrupts will have to stay on to keep the count accurate.
	 */
	void (*disable_vblank) (struct drm_device *dev, int crtc);

827 828 829 830 831 832 833 834 835 836 837
	/**
	 * Called by \c drm_device_is_agp.  Typically used to determine if a
	 * card is really attached to AGP or not.
	 *
	 * \param dev  DRM device handle
	 *
	 * \returns
	 * One of three values is returned depending on whether or not the
	 * card is absolutely \b not AGP (return of 0), absolutely \b is AGP
	 * (return of 1), or may or may not be AGP (return of 2).
	 */
838
	int (*device_is_agp) (struct drm_device *dev);
839

840 841 842
	/**
	 * Called by vblank timestamping code.
	 *
843 844
	 * Return the current display scanout position from a crtc, and an
	 * optional accurate ktime_get timestamp of when position was measured.
845 846 847
	 *
	 * \param dev  DRM device.
	 * \param crtc Id of the crtc to query.
848
	 * \param flags Flags from the caller (DRM_CALLED_FROM_VBLIRQ or 0).
849 850
	 * \param *vpos Target location for current vertical scanout position.
	 * \param *hpos Target location for current horizontal scanout position.
851 852 853 854
	 * \param *stime Target location for timestamp taken immediately before
	 *               scanout position query. Can be NULL to skip timestamp.
	 * \param *etime Target location for timestamp taken immediately after
	 *               scanout position query. Can be NULL to skip timestamp.
855 856 857 858 859 860 861 862
	 *
	 * Returns vpos as a positive number while in active scanout area.
	 * Returns vpos as a negative number inside vblank, counting the number
	 * of scanlines to go until end of vblank, e.g., -1 means "one scanline
	 * until start of active scanout / end of vblank."
	 *
	 * \return Flags, or'ed together as follows:
	 *
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	 * DRM_SCANOUTPOS_VALID = Query successful.
864 865 866 867 868 869 870
	 * DRM_SCANOUTPOS_INVBL = Inside vblank.
	 * DRM_SCANOUTPOS_ACCURATE = Returned position is accurate. A lack of
	 * this flag means that returned position may be offset by a constant
	 * but unknown small number of scanlines wrt. real scanout position.
	 *
	 */
	int (*get_scanout_position) (struct drm_device *dev, int crtc,
871
				     unsigned int flags,
872 873
				     int *vpos, int *hpos, ktime_t *stime,
				     ktime_t *etime);
874 875 876 877 878 879 880 881

	/**
	 * Called by \c drm_get_last_vbltimestamp. Should return a precise
	 * timestamp when the most recent VBLANK interval ended or will end.
	 *
	 * Specifically, the timestamp in @vblank_time should correspond as
	 * closely as possible to the time when the first video scanline of
	 * the video frame after the end of VBLANK will start scanning out,
882
	 * the time immediately after end of the VBLANK interval. If the
883 884 885 886 887 888 889 890 891 892 893 894 895 896 897 898 899 900 901 902 903 904 905 906 907 908 909
	 * @crtc is currently inside VBLANK, this will be a time in the future.
	 * If the @crtc is currently scanning out a frame, this will be the
	 * past start time of the current scanout. This is meant to adhere
	 * to the OpenML OML_sync_control extension specification.
	 *
	 * \param dev dev DRM device handle.
	 * \param crtc crtc for which timestamp should be returned.
	 * \param *max_error Maximum allowable timestamp error in nanoseconds.
	 *                   Implementation should strive to provide timestamp
	 *                   with an error of at most *max_error nanoseconds.
	 *                   Returns true upper bound on error for timestamp.
	 * \param *vblank_time Target location for returned vblank timestamp.
	 * \param flags 0 = Defaults, no special treatment needed.
	 * \param       DRM_CALLED_FROM_VBLIRQ = Function is called from vblank
	 *	        irq handler. Some drivers need to apply some workarounds
	 *              for gpu-specific vblank irq quirks if flag is set.
	 *
	 * \returns
	 * Zero if timestamping isn't supported in current display mode or a
	 * negative number on failure. A positive status code on success,
	 * which describes how the vblank_time timestamp was computed.
	 */
	int (*get_vblank_timestamp) (struct drm_device *dev, int crtc,
				     int *max_error,
				     struct timeval *vblank_time,
				     unsigned flags);

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	/* these have to be filled in */
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	irqreturn_t(*irq_handler) (int irq, void *arg);
913
	void (*irq_preinstall) (struct drm_device *dev);
914
	int (*irq_postinstall) (struct drm_device *dev);
915
	void (*irq_uninstall) (struct drm_device *dev);
916

917 918 919
	/* Master routines */
	int (*master_create)(struct drm_device *dev, struct drm_master *master);
	void (*master_destroy)(struct drm_device *dev, struct drm_master *master);
920 921 922 923 924 925 926 927 928
	/**
	 * master_set is called whenever the minor master is set.
	 * master_drop is called whenever the minor master is dropped.
	 */

	int (*master_set)(struct drm_device *dev, struct drm_file *file_priv,
			  bool from_open);
	void (*master_drop)(struct drm_device *dev, struct drm_file *file_priv,
			    bool from_release);
929

930 931
	int (*debugfs_init)(struct drm_minor *minor);
	void (*debugfs_cleanup)(struct drm_minor *minor);
932 933 934 935 936 937 938 939

	/**
	 * Driver-specific constructor for drm_gem_objects, to set up
	 * obj->driver_private.
	 *
	 * Returns 0 on success.
	 */
	void (*gem_free_object) (struct drm_gem_object *obj);
940 941
	int (*gem_open_object) (struct drm_gem_object *, struct drm_file *);
	void (*gem_close_object) (struct drm_gem_object *, struct drm_file *);
942

943 944 945 946 947 948 949 950 951 952 953 954 955
	/* prime: */
	/* export handle -> fd (see drm_gem_prime_handle_to_fd() helper) */
	int (*prime_handle_to_fd)(struct drm_device *dev, struct drm_file *file_priv,
				uint32_t handle, uint32_t flags, int *prime_fd);
	/* import fd -> handle (see drm_gem_prime_fd_to_handle() helper) */
	int (*prime_fd_to_handle)(struct drm_device *dev, struct drm_file *file_priv,
				int prime_fd, uint32_t *handle);
	/* export GEM -> dmabuf */
	struct dma_buf * (*gem_prime_export)(struct drm_device *dev,
				struct drm_gem_object *obj, int flags);
	/* import dmabuf -> GEM */
	struct drm_gem_object * (*gem_prime_import)(struct drm_device *dev,
				struct dma_buf *dma_buf);
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	/* low-level interface used by drm_gem_prime_{import,export} */
	int (*gem_prime_pin)(struct drm_gem_object *obj);
958
	void (*gem_prime_unpin)(struct drm_gem_object *obj);
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	struct sg_table *(*gem_prime_get_sg_table)(struct drm_gem_object *obj);
	struct drm_gem_object *(*gem_prime_import_sg_table)(
				struct drm_device *dev, size_t size,
				struct sg_table *sgt);
	void *(*gem_prime_vmap)(struct drm_gem_object *obj);
	void (*gem_prime_vunmap)(struct drm_gem_object *obj, void *vaddr);
965 966
	int (*gem_prime_mmap)(struct drm_gem_object *obj,
				struct vm_area_struct *vma);
967

968 969 970
	/* vga arb irq handler */
	void (*vgaarb_irq)(struct drm_device *dev, bool state);

971 972 973 974 975 976 977 978 979 980 981
	/* dumb alloc support */
	int (*dumb_create)(struct drm_file *file_priv,
			   struct drm_device *dev,
			   struct drm_mode_create_dumb *args);
	int (*dumb_map_offset)(struct drm_file *file_priv,
			       struct drm_device *dev, uint32_t handle,
			       uint64_t *offset);
	int (*dumb_destroy)(struct drm_file *file_priv,
			    struct drm_device *dev,
			    uint32_t handle);

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	/* Driver private ops for this object */
983
	const struct vm_operations_struct *gem_vm_ops;
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985 986 987 988 989 990 991
	int major;
	int minor;
	int patchlevel;
	char *name;
	char *desc;
	char *date;

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	u32 driver_features;
	int dev_priv_size;
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	const struct drm_ioctl_desc *ioctls;
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	int num_ioctls;
996
	const struct file_operations *fops;
997 998 999
	union {
		struct pci_driver *pci;
		struct platform_device *platform_device;
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		struct usb_driver *usb;
1001 1002 1003
	} kdriver;
	struct drm_bus *bus;

1004 1005
	/* List of devices hanging off this driver with stealth attach. */
	struct list_head legacy_dev_list;
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};

1008 1009
#define DRM_MINOR_UNASSIGNED 0
#define DRM_MINOR_LEGACY 1
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#define DRM_MINOR_CONTROL 2
#define DRM_MINOR_RENDER 3
1012

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/**
 * Info file list entry. This structure represents a debugfs or proc file to
 * be created by the drm core
 */
struct drm_info_list {
	const char *name; /** file name */
	int (*show)(struct seq_file*, void*); /** show callback */
	u32 driver_features; /**< Required driver features for this entry */
	void *data;
};

/**
 * debugfs node structure. This structure represents a debugfs file.
 */
struct drm_info_node {
	struct list_head list;
	struct drm_minor *minor;
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	const struct drm_info_list *info_ent;
1031 1032 1033
	struct dentry *dent;
};

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/**
1035
 * DRM minor structure. This structure represents a drm minor number.
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 */
1037 1038 1039 1040
struct drm_minor {
	int index;			/**< Minor device number */
	int type;                       /**< Control or render */
	dev_t device;			/**< Device number for mknod */
1041
	struct device *kdev;		/**< Linux device */
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	struct drm_device *dev;
1043 1044

	struct dentry *debugfs_root;
1045 1046 1047

	struct list_head debugfs_list;
	struct mutex debugfs_lock; /* Protects debugfs_list. */
1048

1049 1050
	struct drm_master *master; /* currently active master for this node */
	struct list_head master_list;
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	struct drm_mode_group mode_group;
1052
};
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/* mode specified on the command line */
struct drm_cmdline_mode {
	bool specified;
	bool refresh_specified;
	bool bpp_specified;
	int xres, yres;
	int bpp;
	int refresh;
	bool rb;
	bool interlace;
	bool cvt;
	bool margins;
	enum drm_connector_force force;
};


1070 1071 1072 1073 1074 1075
struct drm_pending_vblank_event {
	struct drm_pending_event base;
	int pipe;
	struct drm_event_vblank event;
};

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struct drm_vblank_crtc {
	wait_queue_head_t queue;	/**< VBLANK wait queue */
	struct timeval time[DRM_VBLANKTIME_RBSIZE];	/**< timestamp of current count */
	atomic_t count;			/**< number of VBLANK interrupts */
	atomic_t refcount;		/* number of users of vblank interruptsper crtc */
	u32 last;			/* protected by dev->vbl_lock, used */
					/* for wraparound handling */
	u32 last_wait;			/* Last vblank seqno waited per CRTC */
	unsigned int inmodeset;		/* Display driver is setting mode */
	bool enabled;			/* so we don't call enable more than
					   once per disable */
};

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/**
 * DRM device structure. This structure represent a complete card that
 * may contain multiple heads.
 */
1093
struct drm_device {
1094
	struct list_head legacy_dev_list;/**< list of devices per driver for stealth attach cleanup */
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	char *devname;			/**< For /proc/interrupts */
	int if_version;			/**< Highest interface version set */
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	/** \name Locks */
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	/*@{ */
	spinlock_t count_lock;		/**< For inuse, drm_device::open_count, drm_device::buf_use */
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	struct mutex struct_mutex;	/**< For others */
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	/*@} */
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	/** \name Usage Counters */
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	/*@{ */
	int open_count;			/**< Outstanding files open */
	int buf_use;			/**< Buffers in use -- cannot alloc */
	atomic_t buf_alloc;		/**< Buffer allocation in progress */
	/*@} */
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1111
	struct list_head filelist;
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	/** \name Memory management */
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1114
	/*@{ */
1115
	struct list_head maplist;	/**< Linked list of regions */
1116
	struct drm_open_hash map_hash;	/**< User token hash table for maps */
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	/** \name Context handle management */
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	/*@{ */
1120
	struct list_head ctxlist;	/**< Linked list of context handles */
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	struct mutex ctxlist_mutex;	/**< For ctxlist */
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1123
	struct idr ctx_idr;
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1125
	struct list_head vmalist;	/**< List of vmas (for debugging) */
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	/*@} */
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	/** \name DMA support */
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1130
	/*@{ */
1131
	struct drm_device_dma *dma;		/**< Optional pointer for DMA support */
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	/*@} */
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	/** \name Context support */
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	/*@{ */
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	bool irq_enabled;		/**< True if irq handler is enabled */
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	__volatile__ long context_flag;	/**< Context swapping flag */
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	int last_context;		/**< Last current context */
	/*@} */

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	/** \name VBLANK IRQ support */
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1142 1143
	/*@{ */

1144 1145 1146 1147 1148 1149
	/*
	 * At load time, disabling the vblank interrupt won't be allowed since
	 * old clients may not call the modeset ioctl and therefore misbehave.
	 * Once the modeset ioctl *has* been called though, we can safely
	 * disable them when unused.
	 */
1150
	bool vblank_disable_allowed;
1151

1152 1153
	/* array of size num_crtcs */
	struct drm_vblank_crtc *vblank;
1154

1155
	spinlock_t vblank_time_lock;    /**< Protects vblank count and time updates during vblank enable/disable */
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	spinlock_t vbl_lock;
1157 1158 1159
	struct timer_list vblank_disable_timer;

	u32 max_vblank_count;           /**< size of vblank counter register */
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1161 1162 1163 1164 1165 1166
	/**
	 * List of events
	 */
	struct list_head vblank_event_list;
	spinlock_t event_lock;

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	/*@} */

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	struct drm_agp_head *agp;	/**< AGP data */
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1171
	struct device *dev;             /**< Device structure */
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	struct pci_dev *pdev;		/**< PCI device structure */
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#ifdef __alpha__
	struct pci_controller *hose;
#endif
1176 1177

	struct platform_device *platformdev; /**< Platform device struture */
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	struct usb_device *usbdev;
1179

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	struct drm_sg_mem *sg;	/**< Scatter gather memory */
1181
	unsigned int num_crtcs;                  /**< Number of CRTCs on this device */
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	void *dev_private;		/**< device private data */
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	struct address_space *dev_mapping;
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	struct drm_sigdata sigdata;	   /**< For block_all_signals */
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	sigset_t sigmask;

	struct drm_driver *driver;
1188
	struct drm_local_map *agp_buffer_map;
1189
	unsigned int agp_buffer_token;
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	struct drm_minor *control;		/**< Control node for card */
1191
	struct drm_minor *primary;		/**< render type primary screen head */
1192
	struct drm_minor *render;		/**< render node for card */
1193

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        struct drm_mode_config mode_config;	/**< Current mode config */

1196 1197
	/** \name GEM information */
	/*@{ */
1198
	struct mutex object_name_lock;
1199
	struct idr object_name_idr;
1200
	struct drm_vma_offset_manager *vma_offset_manager;
1201
	/*@} */
1202
	int switch_power_state;
1203 1204

	atomic_t unplugged; /* device has been unplugged or gone away */
1205
};
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1207 1208 1209
#define DRM_SWITCH_POWER_ON 0
#define DRM_SWITCH_POWER_OFF 1
#define DRM_SWITCH_POWER_CHANGING 2
1210
#define DRM_SWITCH_POWER_DYNAMIC_OFF 3
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static __inline__ int drm_core_check_feature(struct drm_device *dev,
					     int feature)
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{
	return ((dev->driver->driver_features & feature) ? 1 : 0);
}

1218 1219
static inline int drm_dev_to_irq(struct drm_device *dev)
{
1220
	return dev->driver->bus->get_irq(dev);
1221 1222
}

1223 1224 1225 1226 1227 1228 1229 1230 1231 1232 1233 1234 1235
static inline void drm_device_set_unplugged(struct drm_device *dev)
{
	smp_wmb();
	atomic_set(&dev->unplugged, 1);
}

static inline int drm_device_is_unplugged(struct drm_device *dev)
{
	int ret = atomic_read(&dev->unplugged);
	smp_rmb();
	return ret;
}

1236 1237 1238 1239 1240
static inline bool drm_modeset_is_locked(struct drm_device *dev)
{
	return mutex_is_locked(&dev->mode_config.mutex);
}

1241 1242 1243 1244 1245
static inline bool drm_is_render_client(struct drm_file *file_priv)
{
	return file_priv->minor->type == DRM_MINOR_RENDER;
}

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/******************************************************************/
/** \name Internal function definitions */
/*@{*/

				/* Driver support (drm_drv.h) */
1251 1252
extern long drm_ioctl(struct file *filp,
		      unsigned int cmd, unsigned long arg);
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extern long drm_compat_ioctl(struct file *filp,
			     unsigned int cmd, unsigned long arg);
1255
extern int drm_lastclose(struct drm_device *dev);
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				/* Device support (drm_fops.h) */
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extern struct mutex drm_global_mutex;
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extern int drm_open(struct inode *inode, struct file *filp);
extern int drm_stub_open(struct inode *inode, struct file *filp);
1261 1262
extern ssize_t drm_read(struct file *filp, char __user *buffer,
			size_t count, loff_t *offset);
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extern int drm_release(struct inode *inode, struct file *filp);
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				/* Mapping support (drm_vm.h) */
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extern int drm_mmap(struct file *filp, struct vm_area_struct *vma);
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extern int drm_mmap_locked(struct file *filp, struct vm_area_struct *vma);
1268 1269
extern void drm_vm_open_locked(struct drm_device *dev, struct vm_area_struct *vma);
extern void drm_vm_close_locked(struct drm_device *dev, struct vm_area_struct *vma);
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extern unsigned int drm_poll(struct file *filp, struct poll_table_struct *wait);
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				/* Memory management support (drm_memory.h) */
1273
#include <drm/drm_memory.h>
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1275

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				/* Misc. IOCTL support (drm_ioctl.h) */
1277 1278 1279 1280 1281 1282 1283 1284 1285 1286 1287 1288
extern int drm_irq_by_busid(struct drm_device *dev, void *data,
			    struct drm_file *file_priv);
extern int drm_getunique(struct drm_device *dev, void *data,
			 struct drm_file *file_priv);
extern int drm_setunique(struct drm_device *dev, void *data,
			 struct drm_file *file_priv);
extern int drm_getmap(struct drm_device *dev, void *data,
		      struct drm_file *file_priv);
extern int drm_getclient(struct drm_device *dev, void *data,
			 struct drm_file *file_priv);
extern int drm_getstats(struct drm_device *dev, void *data,
			struct drm_file *file_priv);
1289 1290
extern int drm_getcap(struct drm_device *dev, void *data,
		      struct drm_file *file_priv);
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extern int drm_setclientcap(struct drm_device *dev, void *data,
			    struct drm_file *file_priv);
1293 1294 1295 1296
extern int drm_setversion(struct drm_device *dev, void *data,
			  struct drm_file *file_priv);
extern int drm_noop(struct drm_device *dev, void *data,
		    struct drm_file *file_priv);
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				/* Context IOCTL support (drm_context.h) */
1299 1300 1301 1302 1303 1304 1305 1306 1307 1308 1309 1310
extern int drm_resctx(struct drm_device *dev, void *data,
		      struct drm_file *file_priv);
extern int drm_addctx(struct drm_device *dev, void *data,
		      struct drm_file *file_priv);
extern int drm_getctx(struct drm_device *dev, void *data,
		      struct drm_file *file_priv);
extern int drm_switchctx(struct drm_device *dev, void *data,
			 struct drm_file *file_priv);
extern int drm_newctx(struct drm_device *dev, void *data,
		      struct drm_file *file_priv);
extern int drm_rmctx(struct drm_device *dev, void *data,
		     struct drm_file *file_priv);
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1312 1313 1314
extern int drm_ctxbitmap_init(struct drm_device *dev);
extern void drm_ctxbitmap_cleanup(struct drm_device *dev);
extern void drm_ctxbitmap_free(struct drm_device *dev, int ctx_handle);
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1316 1317 1318 1319
extern int drm_setsareactx(struct drm_device *dev, void *data,
			   struct drm_file *file_priv);
extern int drm_getsareactx(struct drm_device *dev, void *data,
			   struct drm_file *file_priv);
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				/* Authentication IOCTL support (drm_auth.h) */
1322 1323 1324 1325
extern int drm_getmagic(struct drm_device *dev, void *data,
			struct drm_file *file_priv);
extern int drm_authmagic(struct drm_device *dev, void *data,
			 struct drm_file *file_priv);
1326
extern int drm_remove_magic(struct drm_master *master, drm_magic_t magic);
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1328 1329
/* Cache management (drm_cache.c) */
void drm_clflush_pages(struct page *pages[], unsigned long num_pages);
1330
void drm_clflush_sg(struct sg_table *st);
1331
void drm_clflush_virt_range(char *addr, unsigned long length);
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				/* Locking IOCTL support (drm_lock.h) */
1334 1335 1336 1337
extern int drm_lock(struct drm_device *dev, void *data,
		    struct drm_file *file_priv);
extern int drm_unlock(struct drm_device *dev, void *data,
		      struct drm_file *file_priv);
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extern int drm_lock_free(struct drm_lock_data *lock_data, unsigned int context);
extern void drm_idlelock_take(struct drm_lock_data *lock_data);
extern void drm_idlelock_release(struct drm_lock_data *lock_data);
1341 1342 1343 1344 1345 1346

/*
 * These are exported to drivers so that they can implement fencing using
 * DMA quiscent + idle. DMA quiescent usually requires the hardware lock.
 */

1347
extern int drm_i_have_hw_lock(struct drm_device *dev, struct drm_file *file_priv);
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				/* Buffer management support (drm_bufs.h) */
1350 1351
extern int drm_addbufs_agp(struct drm_device *dev, struct drm_buf_desc * request);
extern int drm_addbufs_pci(struct drm_device *dev, struct drm_buf_desc * request);
1352
extern int drm_addmap(struct drm_device *dev, resource_size_t offset,
1353
		      unsigned int size, enum drm_map_type type,
1354
		      enum drm_map_flags flags, struct drm_local_map **map_ptr);
1355 1356
extern int drm_addmap_ioctl(struct drm_device *dev, void *data,
			    struct drm_file *file_priv);
1357 1358
extern int drm_rmmap(struct drm_device *dev, struct drm_local_map *map);
extern int drm_rmmap_locked(struct drm_device *dev, struct drm_local_map *map);
1359 1360 1361 1362 1363 1364 1365 1366 1367 1368 1369 1370
extern int drm_rmmap_ioctl(struct drm_device *dev, void *data,
			   struct drm_file *file_priv);
extern int drm_addbufs(struct drm_device *dev, void *data,
		       struct drm_file *file_priv);
extern int drm_infobufs(struct drm_device *dev, void *data,
			struct drm_file *file_priv);
extern int drm_markbufs(struct drm_device *dev, void *data,
			struct drm_file *file_priv);
extern int drm_freebufs(struct drm_device *dev, void *data,
			struct drm_file *file_priv);
extern int drm_mapbufs(struct drm_device *dev, void *data,
		       struct drm_file *file_priv);
1371 1372
extern int drm_dma_ioctl(struct drm_device *dev, void *data,
			 struct drm_file *file_priv);
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				/* DMA support (drm_dma.h) */
1375 1376
extern int drm_legacy_dma_setup(struct drm_device *dev);
extern void drm_legacy_dma_takedown(struct drm_device *dev);
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extern void drm_free_buffer(struct drm_device *dev, struct drm_buf * buf);
1378 1379
extern void drm_core_reclaim_buffers(struct drm_device *dev,
				     struct drm_file *filp);
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				/* IRQ support (drm_irq.h) */
1382 1383
extern int drm_control(struct drm_device *dev, void *data,
		       struct drm_file *file_priv);
1384
extern int drm_irq_install(struct drm_device *dev);
1385
extern int drm_irq_uninstall(struct drm_device *dev);
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1387
extern int drm_vblank_init(struct drm_device *dev, int num_crtcs);
1388
extern int drm_wait_vblank(struct drm_device *dev, void *data,
1389 1390
			   struct drm_file *filp);
extern u32 drm_vblank_count(struct drm_device *dev, int crtc);
1391 1392
extern u32 drm_vblank_count_and_time(struct drm_device *dev, int crtc,
				     struct timeval *vblanktime);
1393 1394
extern void drm_send_vblank_event(struct drm_device *dev, int crtc,
				     struct drm_pending_vblank_event *e);
1395
extern bool drm_handle_vblank(struct drm_device *dev, int crtc);
1396 1397
extern int drm_vblank_get(struct drm_device *dev, int crtc);
extern void drm_vblank_put(struct drm_device *dev, int crtc);
1398
extern void drm_vblank_off(struct drm_device *dev, int crtc);
1399
extern void drm_vblank_cleanup(struct drm_device *dev);
1400 1401 1402 1403 1404 1405
extern u32 drm_get_last_vbltimestamp(struct drm_device *dev, int crtc,
				     struct timeval *tvblank, unsigned flags);
extern int drm_calc_vbltimestamp_from_scanoutpos(struct drm_device *dev,
						 int crtc, int *max_error,
						 struct timeval *vblank_time,
						 unsigned flags,
1406 1407
						 const struct drm_crtc *refcrtc,
						 const struct drm_display_mode *mode);
1408 1409
extern void drm_calc_timestamping_constants(struct drm_crtc *crtc,
					    const struct drm_display_mode *mode);
1410

1411 1412 1413 1414 1415 1416 1417 1418 1419
extern bool
drm_mode_parse_command_line_for_connector(const char *mode_option,
					  struct drm_connector *connector,
					  struct drm_cmdline_mode *mode);

extern struct drm_display_mode *
drm_mode_create_from_cmdline_mode(struct drm_device *dev,
				  struct drm_cmdline_mode *cmd);

1420 1421
extern int drm_display_mode_from_videomode(const struct videomode *vm,
					   struct drm_display_mode *dmode);
1422 1423 1424
extern int of_get_drm_display_mode(struct device_node *np,
				   struct drm_display_mode *dmode,
				   int index);
1425

1426
/* Modesetting support */
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extern void drm_vblank_pre_modeset(struct drm_device *dev, int crtc);
extern void drm_vblank_post_modeset(struct drm_device *dev, int crtc);
1429 1430
extern int drm_modeset_ctl(struct drm_device *dev, void *data,
			   struct drm_file *file_priv);
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				/* AGP/GART support (drm_agpsupport.h) */
1433 1434

#include <drm/drm_agpsupport.h>
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1435 1436

				/* Stub support (drm_stub.h) */
1437 1438 1439 1440 1441 1442 1443
extern int drm_setmaster_ioctl(struct drm_device *dev, void *data,
			       struct drm_file *file_priv);
extern int drm_dropmaster_ioctl(struct drm_device *dev, void *data,
				struct drm_file *file_priv);
struct drm_master *drm_master_create(struct drm_minor *minor);
extern struct drm_master *drm_master_get(struct drm_master *master);
extern void drm_master_put(struct drm_master **master);
1444

1445
extern void drm_put_dev(struct drm_device *dev);
1446
extern void drm_unplug_dev(struct drm_device *dev);
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extern unsigned int drm_debug;
1448
extern unsigned int drm_rnodes;
1449

1450 1451
extern unsigned int drm_vblank_offdelay;
extern unsigned int drm_timestamp_precision;
1452
extern unsigned int drm_timestamp_monotonic;
1453

1454
extern struct class *drm_class;
1455
extern struct dentry *drm_debugfs_root;
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1457 1458
extern struct idr drm_minors_idr;

1459
extern struct drm_local_map *drm_getsarea(struct drm_device *dev);
1460

1461 1462 1463 1464
				/* Debugfs support */
#if defined(CONFIG_DEBUG_FS)
extern int drm_debugfs_init(struct drm_minor *minor, int minor_id,
			    struct dentry *root);
1465 1466 1467 1468 1469
extern int drm_debugfs_create_files(const struct drm_info_list *files,
				    int count, struct dentry *root,
				    struct drm_minor *minor);
extern int drm_debugfs_remove_files(const struct drm_info_list *files,
				    int count, struct drm_minor *minor);
1470
extern int drm_debugfs_cleanup(struct drm_minor *minor);
1471 1472 1473 1474 1475 1476 1477 1478 1479 1480 1481 1482 1483 1484 1485 1486 1487 1488 1489 1490 1491 1492 1493 1494
#else
static inline int drm_debugfs_init(struct drm_minor *minor, int minor_id,
				   struct dentry *root)
{
	return 0;
}

static inline int drm_debugfs_create_files(const struct drm_info_list *files,
					   int count, struct dentry *root,
					   struct drm_minor *minor)
{
	return 0;
}

static inline int drm_debugfs_remove_files(const struct drm_info_list *files,
					   int count, struct drm_minor *minor)
{
	return 0;
}

static inline int drm_debugfs_cleanup(struct drm_minor *minor)
{
	return 0;
}
1495 1496 1497 1498 1499 1500 1501 1502 1503 1504
#endif

				/* Info file support */
extern int drm_name_info(struct seq_file *m, void *data);
extern int drm_vm_info(struct seq_file *m, void *data);
extern int drm_bufs_info(struct seq_file *m, void *data);
extern int drm_vblank_info(struct seq_file *m, void *data);
extern int drm_clients_info(struct seq_file *m, void* data);
extern int drm_gem_name_info(struct seq_file *m, void *data);

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extern struct dma_buf *drm_gem_prime_export(struct drm_device *dev,
		struct drm_gem_object *obj, int flags);
1508 1509 1510
extern int drm_gem_prime_handle_to_fd(struct drm_device *dev,
		struct drm_file *file_priv, uint32_t handle, uint32_t flags,
		int *prime_fd);
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extern struct drm_gem_object *drm_gem_prime_import(struct drm_device *dev,
		struct dma_buf *dma_buf);
1513 1514
extern int drm_gem_prime_fd_to_handle(struct drm_device *dev,
		struct drm_file *file_priv, int prime_fd, uint32_t *handle);
1515
extern void drm_gem_dmabuf_release(struct dma_buf *dma_buf);
1516 1517 1518 1519 1520 1521

extern int drm_prime_handle_to_fd_ioctl(struct drm_device *dev, void *data,
					struct drm_file *file_priv);
extern int drm_prime_fd_to_handle_ioctl(struct drm_device *dev, void *data,
					struct drm_file *file_priv);

1522 1523
extern int drm_prime_sg_to_page_addr_arrays(struct sg_table *sgt, struct page **pages,
					    dma_addr_t *addrs, int max_pages);
1524 1525 1526
extern struct sg_table *drm_prime_pages_to_sg(struct page **pages, int nr_pages);
extern void drm_prime_gem_destroy(struct drm_gem_object *obj, struct sg_table *sg);

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int drm_gem_dumb_destroy(struct drm_file *file,
			 struct drm_device *dev,
			 uint32_t handle);
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void drm_prime_init_file_private(struct drm_prime_file_private *prime_fpriv);
void drm_prime_destroy_file_private(struct drm_prime_file_private *prime_fpriv);
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void drm_prime_remove_buf_handle_locked(struct drm_prime_file_private *prime_fpriv, struct dma_buf *dma_buf);
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#if DRM_DEBUG_CODE
extern int drm_vma_info(struct seq_file *m, void *data);
#endif

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				/* Scatter Gather Support (drm_scatter.h) */
1540
extern void drm_legacy_sg_cleanup(struct drm_device *dev);
1541
extern int drm_sg_alloc(struct drm_device *dev, void *data,
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			struct drm_file *file_priv);
extern int drm_sg_free(struct drm_device *dev, void *data,
		       struct drm_file *file_priv);
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			       /* ATI PCIGART support (ati_pcigart.h) */
1547
extern int drm_ati_pcigart_init(struct drm_device *dev,
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				struct drm_ati_pcigart_info * gart_info);
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extern int drm_ati_pcigart_cleanup(struct drm_device *dev,
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				   struct drm_ati_pcigart_info * gart_info);
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extern drm_dma_handle_t *drm_pci_alloc(struct drm_device *dev, size_t size,
1553
				       size_t align);
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extern void __drm_pci_free(struct drm_device *dev, drm_dma_handle_t * dmah);
extern void drm_pci_free(struct drm_device *dev, drm_dma_handle_t * dmah);
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			       /* sysfs support (drm_sysfs.c) */
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struct drm_sysfs_class;
1559
extern struct class *drm_sysfs_create(struct module *owner, char *name);
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extern void drm_sysfs_destroy(void);
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extern int drm_sysfs_device_add(struct drm_minor *minor);
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extern void drm_sysfs_hotplug_event(struct drm_device *dev);
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extern void drm_sysfs_device_remove(struct drm_minor *minor);
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extern int drm_sysfs_connector_add(struct drm_connector *connector);
extern void drm_sysfs_connector_remove(struct drm_connector *connector);
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/* Graphics Execution Manager library functions (drm_gem.c) */
int drm_gem_init(struct drm_device *dev);
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void drm_gem_destroy(struct drm_device *dev);
1570
void drm_gem_object_release(struct drm_gem_object *obj);
1571
void drm_gem_object_free(struct kref *kref);
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int drm_gem_object_init(struct drm_device *dev,
			struct drm_gem_object *obj, size_t size);
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void drm_gem_private_object_init(struct drm_device *dev,
				 struct drm_gem_object *obj, size_t size);
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void drm_gem_vm_open(struct vm_area_struct *vma);
void drm_gem_vm_close(struct vm_area_struct *vma);
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int drm_gem_mmap_obj(struct drm_gem_object *obj, unsigned long obj_size,
		     struct vm_area_struct *vma);
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int drm_gem_mmap(struct file *filp, struct vm_area_struct *vma);
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1582
#include <drm/drm_global.h>
1583

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static inline void
drm_gem_object_reference(struct drm_gem_object *obj)
{
	kref_get(&obj->refcount);
}

static inline void
drm_gem_object_unreference(struct drm_gem_object *obj)
{
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	if (obj != NULL)
		kref_put(&obj->refcount, drm_gem_object_free);
}
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static inline void
drm_gem_object_unreference_unlocked(struct drm_gem_object *obj)
{
1600
	if (obj && !atomic_add_unless(&obj->refcount.refcount, -1, 1)) {
1601
		struct drm_device *dev = obj->dev;
1602

1603
		mutex_lock(&dev->struct_mutex);
1604 1605
		if (likely(atomic_dec_and_test(&obj->refcount.refcount)))
			drm_gem_object_free(&obj->refcount);
1606 1607
		mutex_unlock(&dev->struct_mutex);
	}
1608 1609
}

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int drm_gem_handle_create_tail(struct drm_file *file_priv,
			       struct drm_gem_object *obj,
			       u32 *handlep);
1613 1614
int drm_gem_handle_create(struct drm_file *file_priv,
			  struct drm_gem_object *obj,
1615
			  u32 *handlep);
1616
int drm_gem_handle_delete(struct drm_file *filp, u32 handle);
1617

1618

1619 1620
void drm_gem_free_mmap_offset(struct drm_gem_object *obj);
int drm_gem_create_mmap_offset(struct drm_gem_object *obj);
1621
int drm_gem_create_mmap_offset_size(struct drm_gem_object *obj, size_t size);
1622

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struct page **drm_gem_get_pages(struct drm_gem_object *obj, gfp_t gfpmask);
void drm_gem_put_pages(struct drm_gem_object *obj, struct page **pages,
		bool dirty, bool accessed);

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struct drm_gem_object *drm_gem_object_lookup(struct drm_device *dev,
					     struct drm_file *filp,
1629
					     u32 handle);
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int drm_gem_close_ioctl(struct drm_device *dev, void *data,
			struct drm_file *file_priv);
int drm_gem_flink_ioctl(struct drm_device *dev, void *data,
			struct drm_file *file_priv);
int drm_gem_open_ioctl(struct drm_device *dev, void *data,
		       struct drm_file *file_priv);
void drm_gem_open(struct drm_device *dev, struct drm_file *file_private);
void drm_gem_release(struct drm_device *dev, struct drm_file *file_private);

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extern void drm_core_ioremap(struct drm_local_map *map, struct drm_device *dev);
extern void drm_core_ioremap_wc(struct drm_local_map *map, struct drm_device *dev);
extern void drm_core_ioremapfree(struct drm_local_map *map, struct drm_device *dev);
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static __inline__ struct drm_local_map *drm_core_findmap(struct drm_device *dev,
							 unsigned int token)
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{
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	struct drm_map_list *_entry;
1647
	list_for_each_entry(_entry, &dev->maplist, head)
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	    if (_entry->user_token == token)
		return _entry->map;
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	return NULL;
}

1653
static __inline__ void drm_core_dropmap(struct drm_local_map *map)
1654
{
1655 1656
}

1657
#include <drm/drm_mem_util.h>
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struct drm_device *drm_dev_alloc(struct drm_driver *driver,
				 struct device *parent);
1661
void drm_dev_free(struct drm_device *dev);
1662
int drm_dev_register(struct drm_device *dev, unsigned long flags);
1663
void drm_dev_unregister(struct drm_device *dev);
1664 1665 1666 1667 1668
/*@}*/

/* PCI section */
static __inline__ int drm_pci_device_is_agp(struct drm_device *dev)
{
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	if (dev->driver->device_is_agp != NULL) {
		int err = (*dev->driver->device_is_agp) (dev);

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		if (err != 2) {
			return err;
		}
	}

	return pci_find_capability(dev->pdev, PCI_CAP_ID_AGP);
}
1679
void drm_pci_agp_destroy(struct drm_device *dev);
1680

1681 1682 1683
extern int drm_pci_init(struct drm_driver *driver, struct pci_driver *pdriver);
extern void drm_pci_exit(struct drm_driver *driver, struct pci_driver *pdriver);
extern int drm_get_pci_dev(struct pci_dev *pdev,
1684 1685
			   const struct pci_device_id *ent,
			   struct drm_driver *driver);
1686

1687 1688 1689 1690 1691
#define DRM_PCIE_SPEED_25 1
#define DRM_PCIE_SPEED_50 2
#define DRM_PCIE_SPEED_80 4

extern int drm_pcie_get_speed_cap_mask(struct drm_device *dev, u32 *speed_mask);
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/* platform section */
extern int drm_platform_init(struct drm_driver *driver, struct platform_device *platform_device);

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/* returns true if currently okay to sleep */
static __inline__ bool drm_can_sleep(void)
{
	if (in_atomic() || in_dbg_master() || irqs_disabled())
		return false;
	return true;
}

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#endif				/* __KERNEL__ */
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#endif