drmP.h 57.3 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/proc_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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#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>
#if defined(CONFIG_AGP) || defined(CONFIG_AGP_MODULE)
#include <linux/types.h>
#include <linux/agp_backend.h>
#endif
#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)))
#define __OS_HAS_MTRR (defined(CONFIG_MTRR))

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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_REQUIRE_AGP 0x2
#define DRIVER_USE_MTRR    0x4
#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_IRQ_VBL     0x100
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#define DRIVER_DMA_QUEUE   0x200
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#define DRIVER_FB_DMA      0x400
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#define DRIVER_IRQ_VBL2    0x800
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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_BUS_PCI 0x1
#define DRIVER_BUS_PLATFORM 0x2
#define DRIVER_BUS_USB 0x3
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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 */
#define DRM_LOOPING_LIMIT     5000000
#define DRM_TIME_SLICE	      (HZ/20)  /**< Time slice for GLXContexts */
#define DRM_LOCK_SLICE	      1	/**< Time slice for lock, in jiffies */

#define DRM_FLAG_DEBUG	  0x01

#define DRM_MAX_CTXBITMAP (PAGE_SIZE * 8)
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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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#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_LEFTCOUNT(x) (((x)->rp + (x)->count - (x)->wp) % ((x)->count + 1))
#define DRM_BUFCOUNT(x) ((x)->count - DRM_LEFTCOUNT(x))

#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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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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	int authenticated;
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	struct pid *pid;
	kuid_t uid;
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	drm_magic_t magic;
	unsigned long ioctl_count;
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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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	int is_master; /* this file private is a master for a minor */
	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 */
	DRM_AGP_MEM *memory;
	unsigned long bound;		/**< address */
	int pages;
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	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 {
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	DRM_AGP_KERN agp_info;		/**< AGP device information */
539
	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;
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	struct drm_hw_lock *lock;
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};
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/**
 * Kernel side of a mapping
 */
struct drm_local_map {
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	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 */
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	struct drm_hash_item hash;
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	struct drm_local_map *map;	/**< mapping */
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	uint64_t user_token;
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	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 */
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	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 {
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	int gart_table_location;
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	int gart_reg_if;
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	void *addr;
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	dma_addr_t bus_addr;
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	dma_addr_t table_mask;
	struct drm_dma_handle *table_handle;
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	struct drm_local_map mapping;
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	int table_size;
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};
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/**
 * GEM specific mm private for tracking GEM objects
 */
struct drm_gem_mm {
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	struct drm_vma_offset_manager vma_manager;
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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;

	/** Handle count of this object. Each handle also holds a reference */
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	atomic_t handle_count; /* number of handles on this object */
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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 */
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	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;

	void *driver_private;
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	/* dma buf exported from this GEM object */
	struct dma_buf *export_dma_buf;

	/* dma buf attachment backing this object */
	struct dma_buf_attachment *import_attach;
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};

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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 */
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	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);
	/* hooks that are for PCI */
	int (*agp_init)(struct drm_device *dev);

};

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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 {
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	int (*load) (struct drm_device *, unsigned long flags);
	int (*firstopen) (struct drm_device *);
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	int (*open) (struct drm_device *, struct drm_file *);
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	void (*preclose) (struct drm_device *, struct drm_file *file_priv);
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	void (*postclose) (struct drm_device *, struct drm_file *);
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	void (*lastclose) (struct drm_device *);
	int (*unload) (struct drm_device *);
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	int (*suspend) (struct drm_device *, pm_message_t state);
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	int (*resume) (struct drm_device *);
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	int (*dma_ioctl) (struct drm_device *dev, void *data, struct drm_file *file_priv);
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	int (*dma_quiescent) (struct drm_device *);
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	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);

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	/**
	 * 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).
	 */
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	int (*device_is_agp) (struct drm_device *dev);
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	/**
	 * Called by vblank timestamping code.
	 *
	 * Return the current display scanout position from a crtc.
	 *
	 * \param dev  DRM device.
	 * \param crtc Id of the crtc to query.
	 * \param *vpos Target location for current vertical scanout position.
	 * \param *hpos Target location for current horizontal scanout position.
	 *
	 * 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.
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	 * 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,
				     int *vpos, int *hpos);

	/**
	 * 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,
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	 * the time immediately after end of the VBLANK interval. If the
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	 * @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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883
	irqreturn_t(*irq_handler) (DRM_IRQ_ARGS);
884
	void (*irq_preinstall) (struct drm_device *dev);
885
	int (*irq_postinstall) (struct drm_device *dev);
886 887
	void (*irq_uninstall) (struct drm_device *dev);
	void (*set_version) (struct drm_device *dev,
888
			     struct drm_set_version *sv);
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890 891 892
	/* Master routines */
	int (*master_create)(struct drm_device *dev, struct drm_master *master);
	void (*master_destroy)(struct drm_device *dev, struct drm_master *master);
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	/**
	 * 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);
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903 904
	int (*debugfs_init)(struct drm_minor *minor);
	void (*debugfs_cleanup)(struct drm_minor *minor);
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	/**
	 * Driver-specific constructor for drm_gem_objects, to set up
	 * obj->driver_private.
	 *
	 * Returns 0 on success.
	 */
	int (*gem_init_object) (struct drm_gem_object *obj);
	void (*gem_free_object) (struct drm_gem_object *obj);
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	int (*gem_open_object) (struct drm_gem_object *, struct drm_file *);
	void (*gem_close_object) (struct drm_gem_object *, struct drm_file *);
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	/* 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);
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	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);
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	int (*gem_prime_mmap)(struct drm_gem_object *obj,
				struct vm_area_struct *vma);
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942 943 944
	/* vga arb irq handler */
	void (*vgaarb_irq)(struct drm_device *dev, bool state);

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	/* 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 */
957
	const struct vm_operations_struct *gem_vm_ops;
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959 960 961 962 963 964 965
	int major;
	int minor;
	int patchlevel;
	char *name;
	char *desc;
	char *date;

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	u32 driver_features;
	int dev_priv_size;
968
	struct drm_ioctl_desc *ioctls;
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	int num_ioctls;
970
	const struct file_operations *fops;
971 972 973
	union {
		struct pci_driver *pci;
		struct platform_device *platform_device;
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		struct usb_driver *usb;
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	} kdriver;
	struct drm_bus *bus;

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	/* List of devices hanging off this driver */
	struct list_head device_list;
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};

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#define DRM_MINOR_UNASSIGNED 0
#define DRM_MINOR_LEGACY 1
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#define DRM_MINOR_CONTROL 2
#define DRM_MINOR_RENDER 3
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/**
 * debugfs node list. This structure represents a debugfs file to
 * be created by the drm core
 */
struct drm_debugfs_list {
	const char *name; /** file name */
	int (*show)(struct seq_file*, void*); /** show callback */
	u32 driver_features; /**< Required driver features for this entry */
};

/**
 * debugfs node structure. This structure represents a debugfs file.
 */
struct drm_debugfs_node {
	struct list_head list;
	struct drm_minor *minor;
	struct drm_debugfs_list *debugfs_ent;
	struct dentry *dent;
};

/**
 * 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;
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	struct dentry *dent;
};

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/**
1030
 * DRM minor structure. This structure represents a drm minor number.
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 */
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struct drm_minor {
	int index;			/**< Minor device number */
	int type;                       /**< Control or render */
	dev_t device;			/**< Device number for mknod */
	struct device kdev;		/**< Linux device */
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	struct drm_device *dev;
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	struct proc_dir_entry *proc_root;  /**< proc directory entry */
	struct drm_info_node proc_nodes;
	struct dentry *debugfs_root;
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	struct list_head debugfs_list;
	struct mutex debugfs_lock; /* Protects debugfs_list. */
1045

1046 1047
	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;
1049
};
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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;
};


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struct drm_pending_vblank_event {
	struct drm_pending_event base;
	int pipe;
	struct drm_event_vblank event;
};

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/**
 * DRM device structure. This structure represent a complete card that
 * may contain multiple heads.
 */
1077
struct drm_device {
1078
	struct list_head driver_item;	/**< list of devices per driver */
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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 */
	atomic_t ioctl_count;		/**< Outstanding IOCTLs pending */
	atomic_t vma_count;		/**< Outstanding vma areas open */
	int buf_use;			/**< Buffers in use -- cannot alloc */
	atomic_t buf_alloc;		/**< Buffer allocation in progress */
	/*@} */
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	/** \name Performance counters */
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	/*@{ */
	unsigned long counters;
1100
	enum drm_stat_type types[15];
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	atomic_t counts[15];
	/*@} */
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1104
	struct list_head filelist;
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	/** \name Memory management */
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	/*@{ */
1108
	struct list_head maplist;	/**< Linked list of regions */
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	int map_count;			/**< Number of mappable regions */
1110
	struct drm_open_hash map_hash;	/**< User token hash table for maps */
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	/** \name Context handle management */
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	/*@{ */
1114
	struct list_head ctxlist;	/**< Linked list of context handles */
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	int ctx_count;			/**< Number of context handles */
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	struct mutex ctxlist_mutex;	/**< For ctxlist */
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1118
	struct idr ctx_idr;
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1120
	struct list_head vmalist;	/**< List of vmas (for debugging) */
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	/*@} */
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	/** \name DMA support */
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	/*@{ */
1126
	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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	/*@{ */
	int 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 */
	/*@} */

	struct work_struct work;
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	/** \name VBLANK IRQ support */
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	/*@{ */

1140 1141 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.
	 */
	int vblank_disable_allowed;

	wait_queue_head_t *vbl_queue;   /**< VBLANK wait queue */
	atomic_t *_vblank_count;        /**< number of VBLANK interrupts (driver must alloc the right number of counters) */
1150 1151
	struct timeval *_vblank_time;   /**< timestamp of current vblank_count (drivers must alloc right number of fields) */
	spinlock_t vblank_time_lock;    /**< Protects vblank count and time updates during vblank enable/disable */
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	spinlock_t vbl_lock;
1153 1154 1155 1156 1157 1158
	atomic_t *vblank_refcount;      /* number of users of vblank interruptsper crtc */
	u32 *last_vblank;               /* protected by dev->vbl_lock, used */
					/* for wraparound handling */
	int *vblank_enabled;            /* so we don't call enable more than
					   once per disable */
	int *vblank_inmodeset;          /* Display driver is setting mode */
1159
	u32 *last_vblank_wait;		/* Last vblank seqno waited per CRTC */
1160 1161 1162
	struct timer_list vblank_disable_timer;

	u32 max_vblank_count;           /**< size of vblank counter register */
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1164 1165 1166 1167 1168 1169
	/**
	 * List of events
	 */
	struct list_head vblank_event_list;
	spinlock_t event_lock;

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	/*@} */

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	struct fasync_struct *buf_async;/**< Processes waiting for SIGIO */

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	struct drm_agp_head *agp;	/**< AGP data */
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1176
	struct device *dev;             /**< Device structure */
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	struct pci_dev *pdev;		/**< PCI device structure */
1178 1179
	int pci_vendor;			/**< PCI vendor id */
	int pci_device;			/**< PCI device id */
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#ifdef __alpha__
	struct pci_controller *hose;
#endif
1183 1184

	struct platform_device *platformdev; /**< Platform device struture */
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	struct usb_device *usbdev;
1186

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	struct drm_sg_mem *sg;	/**< Scatter gather memory */
1188
	unsigned int num_crtcs;                  /**< Number of CRTCs on this device */
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	void *dev_private;		/**< device private data */
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	void *mm_private;
	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;
1196
	struct drm_local_map *agp_buffer_map;
1197
	unsigned int agp_buffer_token;
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	struct drm_minor *control;		/**< Control node for card */
1199
	struct drm_minor *primary;		/**< render type primary screen head */
1200

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

1203 1204 1205 1206 1207
	/** \name GEM information */
	/*@{ */
	spinlock_t object_name_lock;
	struct idr object_name_idr;
	/*@} */
1208
	int switch_power_state;
1209 1210

	atomic_t unplugged; /* device has been unplugged or gone away */
1211
};
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1213 1214 1215 1216
#define DRM_SWITCH_POWER_ON 0
#define DRM_SWITCH_POWER_OFF 1
#define DRM_SWITCH_POWER_CHANGING 2

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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);
}

1223 1224
static inline int drm_dev_to_irq(struct drm_device *dev)
{
1225
	return dev->driver->bus->get_irq(dev);
1226 1227
}

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#if __OS_HAS_AGP
static inline int drm_core_has_AGP(struct drm_device *dev)
{
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	return drm_core_check_feature(dev, DRIVER_USE_AGP);
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}
#else
#define drm_core_has_AGP(dev) (0)
#endif

#if __OS_HAS_MTRR
static inline int drm_core_has_MTRR(struct drm_device *dev)
{
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	return drm_core_check_feature(dev, DRIVER_USE_MTRR);
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}
#else
#define drm_core_has_MTRR(dev) (0)
#endif

1247 1248 1249 1250 1251 1252 1253 1254 1255 1256 1257 1258 1259
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;
}

1260 1261 1262 1263 1264
static inline bool drm_modeset_is_locked(struct drm_device *dev)
{
	return mutex_is_locked(&dev->mode_config.mutex);
}

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

				/* Driver support (drm_drv.h) */
1270 1271
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);
1274
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);
extern int drm_fasync(int fd, struct file *filp, int on);
1281 1282
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);
1288 1289
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) */
1293
#include <drm/drm_memory.h>
1294
extern void drm_free_agp(DRM_AGP_MEM * handle, int pages);
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extern int drm_bind_agp(DRM_AGP_MEM * handle, unsigned int start);
1296 1297 1298
extern DRM_AGP_MEM *drm_agp_bind_pages(struct drm_device *dev,
				       struct page **pages,
				       unsigned long num_pages,
1299 1300
				       uint32_t gtt_offset,
				       uint32_t type);
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extern int drm_unbind_agp(DRM_AGP_MEM * handle);
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				/* Misc. IOCTL support (drm_ioctl.h) */
1304 1305 1306 1307 1308 1309 1310 1311 1312 1313 1314 1315
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);
1316 1317
extern int drm_getcap(struct drm_device *dev, void *data,
		      struct drm_file *file_priv);
1318 1319 1320 1321
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) */
1324 1325 1326 1327 1328 1329 1330 1331 1332 1333 1334 1335
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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1337 1338 1339
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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1341 1342 1343 1344
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) */
1347 1348 1349 1350
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);
1351
extern int drm_remove_magic(struct drm_master *master, drm_magic_t magic);
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1353 1354
/* Cache management (drm_cache.c) */
void drm_clflush_pages(struct page *pages[], unsigned long num_pages);
1355
void drm_clflush_sg(struct sg_table *st);
1356
void drm_clflush_virt_range(char *addr, unsigned long length);
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				/* Locking IOCTL support (drm_lock.h) */
1359 1360 1361 1362
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);
1366 1367 1368 1369 1370 1371

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

1372
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) */
1375 1376
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);
1377
extern int drm_addmap(struct drm_device *dev, resource_size_t offset,
1378
		      unsigned int size, enum drm_map_type type,
1379
		      enum drm_map_flags flags, struct drm_local_map **map_ptr);
1380 1381
extern int drm_addmap_ioctl(struct drm_device *dev, void *data,
			    struct drm_file *file_priv);
1382 1383
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);
1384 1385 1386 1387 1388 1389 1390 1391 1392 1393 1394 1395
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);
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				/* DMA support (drm_dma.h) */
1398 1399
extern int drm_dma_setup(struct drm_device *dev);
extern void drm_dma_takedown(struct drm_device *dev);
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extern void drm_free_buffer(struct drm_device *dev, struct drm_buf * buf);
1401 1402
extern void drm_core_reclaim_buffers(struct drm_device *dev,
				     struct drm_file *filp);
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				/* IRQ support (drm_irq.h) */
1405 1406
extern int drm_control(struct drm_device *dev, void *data,
		       struct drm_file *file_priv);
1407
extern int drm_irq_install(struct drm_device *dev);
1408
extern int drm_irq_uninstall(struct drm_device *dev);
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1410
extern int drm_vblank_init(struct drm_device *dev, int num_crtcs);
1411
extern int drm_wait_vblank(struct drm_device *dev, void *data,
1412
			   struct drm_file *filp);
1413
extern int drm_vblank_wait(struct drm_device *dev, unsigned int *vbl_seq);
1414
extern u32 drm_vblank_count(struct drm_device *dev, int crtc);
1415 1416
extern u32 drm_vblank_count_and_time(struct drm_device *dev, int crtc,
				     struct timeval *vblanktime);
1417 1418
extern void drm_send_vblank_event(struct drm_device *dev, int crtc,
				     struct drm_pending_vblank_event *e);
1419
extern bool drm_handle_vblank(struct drm_device *dev, int crtc);
1420 1421
extern int drm_vblank_get(struct drm_device *dev, int crtc);
extern void drm_vblank_put(struct drm_device *dev, int crtc);
1422
extern void drm_vblank_off(struct drm_device *dev, int crtc);
1423
extern void drm_vblank_cleanup(struct drm_device *dev);
1424 1425 1426 1427 1428 1429 1430 1431 1432
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,
						 struct drm_crtc *refcrtc);
extern void drm_calc_timestamping_constants(struct drm_crtc *crtc);

1433 1434 1435 1436 1437 1438 1439 1440 1441
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);

1442 1443
extern int drm_display_mode_from_videomode(const struct videomode *vm,
					   struct drm_display_mode *dmode);
1444 1445 1446
extern int of_get_drm_display_mode(struct device_node *np,
				   struct drm_display_mode *dmode,
				   int index);
1447

1448
/* 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);
1451 1452
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) */
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extern struct drm_agp_head *drm_agp_init(struct drm_device *dev);
1456
extern int drm_agp_acquire(struct drm_device *dev);
1457 1458
extern int drm_agp_acquire_ioctl(struct drm_device *dev, void *data,
				 struct drm_file *file_priv);
1459
extern int drm_agp_release(struct drm_device *dev);
1460 1461
extern int drm_agp_release_ioctl(struct drm_device *dev, void *data,
				 struct drm_file *file_priv);
1462
extern int drm_agp_enable(struct drm_device *dev, struct drm_agp_mode mode);
1463 1464 1465 1466 1467
extern int drm_agp_enable_ioctl(struct drm_device *dev, void *data,
				struct drm_file *file_priv);
extern int drm_agp_info(struct drm_device *dev, struct drm_agp_info *info);
extern int drm_agp_info_ioctl(struct drm_device *dev, void *data,
			struct drm_file *file_priv);
1468
extern int drm_agp_alloc(struct drm_device *dev, struct drm_agp_buffer *request);
1469 1470
extern int drm_agp_alloc_ioctl(struct drm_device *dev, void *data,
			 struct drm_file *file_priv);
1471
extern int drm_agp_free(struct drm_device *dev, struct drm_agp_buffer *request);
1472 1473
extern int drm_agp_free_ioctl(struct drm_device *dev, void *data,
			struct drm_file *file_priv);
1474
extern int drm_agp_unbind(struct drm_device *dev, struct drm_agp_binding *request);
1475 1476
extern int drm_agp_unbind_ioctl(struct drm_device *dev, void *data,
			  struct drm_file *file_priv);
1477
extern int drm_agp_bind(struct drm_device *dev, struct drm_agp_binding *request);
1478 1479
extern int drm_agp_bind_ioctl(struct drm_device *dev, void *data,
			struct drm_file *file_priv);
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				/* Stub support (drm_stub.h) */
1482 1483 1484 1485 1486 1487 1488
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);
1489

1490
extern void drm_put_dev(struct drm_device *dev);
1491
extern int drm_put_minor(struct drm_minor **minor);
1492
extern void drm_unplug_dev(struct drm_device *dev);
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extern unsigned int drm_debug;
1494

1495 1496
extern unsigned int drm_vblank_offdelay;
extern unsigned int drm_timestamp_precision;
1497
extern unsigned int drm_timestamp_monotonic;
1498

1499
extern struct class *drm_class;
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extern struct proc_dir_entry *drm_proc_root;
1501
extern struct dentry *drm_debugfs_root;
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1503 1504
extern struct idr drm_minors_idr;

1505
extern struct drm_local_map *drm_getsarea(struct drm_device *dev);
1506

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				/* Proc support (drm_proc.h) */
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extern int drm_proc_init(struct drm_minor *minor, struct proc_dir_entry *root);
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extern int drm_proc_cleanup(struct drm_minor *minor, struct proc_dir_entry *root);
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				/* Debugfs support */
#if defined(CONFIG_DEBUG_FS)
extern int drm_debugfs_init(struct drm_minor *minor, int minor_id,
			    struct dentry *root);
extern int drm_debugfs_create_files(struct drm_info_list *files, int count,
				    struct dentry *root, struct drm_minor *minor);
extern int drm_debugfs_remove_files(struct drm_info_list *files, int count,
                                    struct drm_minor *minor);
extern int drm_debugfs_cleanup(struct drm_minor *minor);
#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);
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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);
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extern int drm_gem_prime_fd_to_handle(struct drm_device *dev,
		struct drm_file *file_priv, int prime_fd, uint32_t *handle);

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);

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extern int drm_prime_sg_to_page_addr_arrays(struct sg_table *sgt, struct page **pages,
					    dma_addr_t *addrs, int max_pages);
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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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int drm_prime_lookup_buf_handle(struct drm_prime_file_private *prime_fpriv, struct dma_buf *dma_buf, uint32_t *handle);
void drm_prime_remove_buf_handle(struct drm_prime_file_private *prime_fpriv, struct dma_buf *dma_buf);
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int drm_prime_add_dma_buf(struct drm_device *dev, struct drm_gem_object *obj);
int drm_prime_lookup_obj(struct drm_device *dev, struct dma_buf *buf,
			 struct drm_gem_object **obj);

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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) */
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extern void drm_sg_cleanup(struct drm_sg_mem * entry);
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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) */
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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,
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				       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;
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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);
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void drm_gem_object_release(struct drm_gem_object *obj);
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void drm_gem_object_free(struct kref *kref);
struct drm_gem_object *drm_gem_object_alloc(struct drm_device *dev,
					    size_t size);
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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_object_handle_free(struct drm_gem_object *obj);
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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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1614
#include <drm/drm_global.h>
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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)
{
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	if (obj != NULL) {
		struct drm_device *dev = obj->dev;
		mutex_lock(&dev->struct_mutex);
		kref_put(&obj->refcount, drm_gem_object_free);
		mutex_unlock(&dev->struct_mutex);
	}
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}

int drm_gem_handle_create(struct drm_file *file_priv,
			  struct drm_gem_object *obj,
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			  u32 *handlep);
1643
int drm_gem_handle_delete(struct drm_file *filp, u32 handle);
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static inline void
drm_gem_object_handle_reference(struct drm_gem_object *obj)
{
	drm_gem_object_reference(obj);
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	atomic_inc(&obj->handle_count);
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}

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static inline void
drm_gem_object_handle_unreference_unlocked(struct drm_gem_object *obj)
{
	if (obj == NULL)
		return;

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	if (atomic_read(&obj->handle_count) == 0)
		return;

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	/*
	* Must bump handle count first as this may be the last
	* ref, in which case the object would disappear before we
	* checked for a name
	*/
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	if (atomic_dec_and_test(&obj->handle_count))
		drm_gem_object_handle_free(obj);
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	drm_gem_object_unreference_unlocked(obj);
}

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void drm_gem_free_mmap_offset(struct drm_gem_object *obj);
int drm_gem_create_mmap_offset(struct drm_gem_object *obj);

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struct drm_gem_object *drm_gem_object_lookup(struct drm_device *dev,
					     struct drm_file *filp,
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					     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;
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	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;
}

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static __inline__ void drm_core_dropmap(struct drm_local_map *map)
1702
{
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}

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#include <drm/drm_mem_util.h>
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extern int drm_fill_in_dev(struct drm_device *dev,
			   const struct pci_device_id *ent,
			   struct drm_driver *driver);
int drm_get_minor(struct drm_device *dev, struct drm_minor **minor, int type);
/*@}*/

/* 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);
}

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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,
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			   const struct pci_device_id *ent,
			   struct drm_driver *driver);
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#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);
extern void drm_platform_exit(struct drm_driver *driver, struct platform_device *platform_device);

extern int drm_get_platform_dev(struct platform_device *pdev,
				struct drm_driver *driver);
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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