drmp.h

h内核

/**
 * \file drmP.h 
 * Private header for Direct Rendering Manager
 * 
 * \author Rickard E. (Rik) Faith <[e-mail]>
 * \author Gareth Hughes <[e-mail]>
 */

/*
 * Copyright 1999 Precision Insight, Inc., Cedar Park, Texas.
 * Copyright 2000 VA Linux Systems, Inc., Sunnyvale, California.
 * 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_

/* If you want the memory alloc debug functionality, change define below */
/* #define DEBUG_MEMORY */

#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>
#endif /* __alpha__ */
#include <linux/config.h>
#include <linux/module.h>
#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>
#include <linux/pci.h>
#include <linux/version.h>
#include <linux/jiffies.h>
#include <linux/smp_lock.h>	/* For (un)lock_kernel */
#include <linux/mm.h>
#include <linux/cdev.h>
#if defined(__alpha__) || defined(__powerpc__)
#include <asm/pgtable.h> /* For pte_wrprotect */
#endif
#include <asm/io.h>
#include <asm/mman.h>
#include <asm/uaccess.h>
#ifdef CONFIG_MTRR
#include <asm/mtrr.h>
#endif
#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>
#include "drm.h"

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

#include "drm_os_linux.h"

/***********************************************************************/
/** \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
#define DRIVER_IRQ_VBL     0x100
#define DRIVER_DMA_QUEUE   0x200

/***********************************************************************/
/** \name Begin the DRM... */
/*@{*/

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

#define DRM_HASH_SIZE	      16 /**< Size of key hash table. Must be power of 2. */
#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_BSZ		      1024 /**< Buffer size for /dev/drm? output */
#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_MEM_DMA	   0
#define DRM_MEM_SAREA	   1
#define DRM_MEM_DRIVER	   2
#define DRM_MEM_MAGIC	   3
#define DRM_MEM_IOCTLS	   4
#define DRM_MEM_MAPS	   5
#define DRM_MEM_VMAS	   6
#define DRM_MEM_BUFS	   7
#define DRM_MEM_SEGS	   8
#define DRM_MEM_PAGES	   9
#define DRM_MEM_FILES	  10
#define DRM_MEM_QUEUES	  11
#define DRM_MEM_CMDS	  12
#define DRM_MEM_MAPPINGS  13
#define DRM_MEM_BUFLISTS  14
#define DRM_MEM_AGPLISTS  15
#define DRM_MEM_TOTALAGP  16
#define DRM_MEM_BOUNDAGP  17
#define DRM_MEM_CTXBITMAP 18
#define DRM_MEM_STUB      19
#define DRM_MEM_SGLISTS   20
#define DRM_MEM_CTXLIST  21

#define DRM_MAX_CTXBITMAP (PAGE_SIZE * 8)
	
/*@}*/


/***********************************************************************/
/** \name Backward compatibility section */
/*@{*/

#ifndef MODULE_LICENSE
#define MODULE_LICENSE(x) 
#endif

#ifndef preempt_disable
#define preempt_disable()
#define preempt_enable()
#endif

#ifndef pte_offset_map 
#define pte_offset_map pte_offset
#define pte_unmap(pte)
#endif

#if LINUX_VERSION_CODE < KERNEL_VERSION(2,4,19)
static inline struct page * vmalloc_to_page(void * vmalloc_addr)
{
	unsigned long addr = (unsigned long) vmalloc_addr;
	struct page *page = NULL;
	pgd_t *pgd = pgd_offset_k(addr);
	pmd_t *pmd;
	pte_t *ptep, pte;
  
	if (!pgd_none(*pgd)) {
		pmd = pmd_offset(pgd, addr);
		if (!pmd_none(*pmd)) {
			preempt_disable();
			ptep = pte_offset_map(pmd, addr);
			pte = *ptep;
			if (pte_present(pte))
				page = pte_page(pte);
			pte_unmap(ptep);
			preempt_enable();
		}
	}
	return page;
}
#endif

#if LINUX_VERSION_CODE < KERNEL_VERSION(2,5,0)
#define DRM_RPR_ARG(vma)
#else
#define DRM_RPR_ARG(vma) vma,
#endif

#define VM_OFFSET(vma) ((vma)->vm_pgoff << PAGE_SHIFT)

/*@}*/


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

/**
 * Error output.
 *
 * \param fmt printf() like format string.
 * \param arg arguments
 */
#define DRM_ERROR(fmt, arg...) \
	printk(KERN_ERR "[" DRM_NAME ":%s] *ERROR* " fmt , __FUNCTION__ , ##arg)

/**
 * Memory error output.
 *
 * \param area memory area where the error occurred.
 * \param fmt printf() like format string.
 * \param arg arguments
 */
#define DRM_MEM_ERROR(area, fmt, arg...) \
	printk(KERN_ERR "[" DRM_NAME ":%s:%s] *ERROR* " fmt , __FUNCTION__, \
	       drm_mem_stats[area].name , ##arg)

#define DRM_INFO(fmt, arg...)  printk(KERN_INFO "[" DRM_NAME "] " fmt , ##arg)

/**
 * Debug output.
 * 
 * \param fmt printf() like format string.
 * \param arg arguments
 */
#if DRM_DEBUG_CODE
#define DRM_DEBUG(fmt, arg...)						\
	do {								\
		if ( drm_debug )			\
			printk(KERN_DEBUG				\
			       "[" DRM_NAME ":%s] " fmt ,	\
			       __FUNCTION__ , ##arg);			\
	} while (0)
#else
#define DRM_DEBUG(fmt, arg...)		 do { } while (0)
#endif

#define DRM_PROC_LIMIT (PAGE_SIZE-80)

#define DRM_PROC_PRINT(fmt, arg...)					\
   len += sprintf(&buf[len], fmt , ##arg);				\
   if (len > DRM_PROC_LIMIT) { *eof = 1; return len - offset; }

#define DRM_PROC_PRINT_RET(ret, fmt, arg...)				\
   len += sprintf(&buf[len], fmt , ##arg);				\
   if (len > DRM_PROC_LIMIT) { ret; *eof = 1; return len - offset; }

/*@}*/


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

#define DRM_ARRAY_SIZE(x) (sizeof(x)/sizeof(x[0]))
#define DRM_MIN(a,b) ((a)<(b)?(a):(b))
#define DRM_MAX(a,b) ((a)>(b)?(a):(b))

#define DRM_LEFTCOUNT(x) (((x)->rp + (x)->count - (x)->wp) % ((x)->count + 1))
#define DRM_BUFCOUNT(x) ((x)->count - DRM_LEFTCOUNT(x))
#define DRM_WAITCOUNT(dev,idx) DRM_BUFCOUNT(&dev->queuelist[idx]->waitlist)

#define DRM_IF_VERSION(maj, min) (maj << 16 | min)
/**
 * Get the private SAREA mapping.
 *
 * \param _dev DRM device.
 * \param _ctx context number.
 * \param _map output mapping.
 */
#define DRM_GET_PRIV_SAREA(_dev, _ctx, _map) do {	\
	(_map) = (_dev)->context_sareas[_ctx];		\
} while(0)

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

/**
 * Copy and IOCTL return string to user space
 */
#define DRM_COPY( name, value )						\
	len = strlen( value );						\
	if ( len > name##_len ) len = name##_len;			\
	name##_len = strlen( value );					\
	if ( len && name ) {						\
		if ( copy_to_user( name, value, len ) )			\
			return -EFAULT;					\
	}
	
/**
 * Ioctl function type.
 *
 * \param inode device inode.
 * \param filp file pointer.
 * \param cmd command.
 * \param arg argument.
 */
typedef int drm_ioctl_t( struct inode *inode, struct file *filp,
			 unsigned int cmd, unsigned long arg );

typedef struct drm_ioctl_desc {
	drm_ioctl_t	     *func;
	int		     auth_needed;
	int		     root_only;
} drm_ioctl_desc_t;

typedef struct drm_devstate {
	pid_t		  owner;	/**< X server pid holding x_lock */
} drm_devstate_t;

typedef struct drm_magic_entry {
	drm_magic_t	       magic;
	struct drm_file	       *priv;
	struct drm_magic_entry *next;
} drm_magic_entry_t;

typedef struct drm_magic_head {
	struct drm_magic_entry *head;
	struct drm_magic_entry *tail;
} drm_magic_head_t;

typedef struct drm_vma_entry {
	struct vm_area_struct *vma;
	struct drm_vma_entry  *next;
	pid_t		      pid;
} drm_vma_entry_t;

/**
 * DMA buffer.
 */
typedef struct drm_buf {
	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 */