drmp.h

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/* drmP.h -- Private header for Direct Rendering Manager -*- linux-c -*-
 * Created: Mon Jan  4 10:05:05 1999 by [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.
 *
 * Authors:
 *    Rickard E. (Rik) Faith <[e-mail]>
 *    Gareth Hughes <[e-mail]>
 */

#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>
#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/wrapper.h>
#include <linux/version.h>
#include <linux/sched.h>
#include <linux/smp_lock.h>	/* For (un)lock_kernel */
#include <asm/system.h>	/* for cmpxchg() */
#include <linux/mm.h>
#include <linux/pagemap.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/tqueue.h>
#include <linux/poll.h>
#include <asm/pgalloc.h>
#include "drm.h"

#include "drm_os_linux.h"

/* DRM template customization defaults
 */
#ifndef __HAVE_AGP
#define __HAVE_AGP		0
#endif
#ifndef __HAVE_MTRR
#define __HAVE_MTRR		0
#endif
#ifndef __HAVE_CTX_BITMAP
#define __HAVE_CTX_BITMAP	0
#endif
#ifndef __HAVE_DMA
#define __HAVE_DMA		0
#endif
#ifndef __HAVE_DMA_IRQ
#define __HAVE_DMA_IRQ		0
#endif
#ifndef __HAVE_DMA_WAITLIST
#define __HAVE_DMA_WAITLIST	0
#endif
#ifndef __HAVE_DMA_FREELIST
#define __HAVE_DMA_FREELIST	0
#endif
#ifndef __HAVE_DMA_HISTOGRAM
#define __HAVE_DMA_HISTOGRAM	0
#endif

#define __REALLY_HAVE_AGP	(__HAVE_AGP && (defined(CONFIG_AGP) || \
						defined(CONFIG_AGP_MODULE)))
#define __REALLY_HAVE_MTRR	(__HAVE_MTRR && defined(CONFIG_MTRR))


				/* Generic cmpxchg added in 2.3.x */
#ifndef __HAVE_ARCH_CMPXCHG
				/* Include this here so that driver can be
                                   used with older kernels. */
#if defined(__alpha__)
static __inline__ unsigned long
__cmpxchg_u32(volatile int *m, int old, int new)
{
	unsigned long prev, cmp;

	__asm__ __volatile__(
	"1:	ldl_l %0,%2\n"
	"	cmpeq %0,%3,%1\n"
	"	beq %1,2f\n"
	"	mov %4,%1\n"
	"	stl_c %1,%2\n"
	"	beq %1,3f\n"
	"2:	mb\n"
	".subsection 2\n"
	"3:	br 1b\n"
	".previous"
	: "=&r"(prev), "=&r"(cmp), "=m"(*m)
	: "r"((long) old), "r"(new), "m"(*m));

	return prev;
}

static __inline__ unsigned long
__cmpxchg_u64(volatile long *m, unsigned long old, unsigned long new)
{
	unsigned long prev, cmp;

	__asm__ __volatile__(
	"1:	ldq_l %0,%2\n"
	"	cmpeq %0,%3,%1\n"
	"	beq %1,2f\n"
	"	mov %4,%1\n"
	"	stq_c %1,%2\n"
	"	beq %1,3f\n"
	"2:	mb\n"
	".subsection 2\n"
	"3:	br 1b\n"
	".previous"
	: "=&r"(prev), "=&r"(cmp), "=m"(*m)
	: "r"((long) old), "r"(new), "m"(*m));

	return prev;
}

static __inline__ unsigned long
__cmpxchg(volatile void *ptr, unsigned long old, unsigned long new, int size)
{
	switch (size) {
		case 4:
			return __cmpxchg_u32(ptr, old, new);
		case 8:
			return __cmpxchg_u64(ptr, old, new);
	}
	return old;
}
#define cmpxchg(ptr,o,n)						 \
  ({									 \
     __typeof__(*(ptr)) _o_ = (o);					 \
     __typeof__(*(ptr)) _n_ = (n);					 \
     (__typeof__(*(ptr))) __cmpxchg((ptr), (unsigned long)_o_,		 \
				    (unsigned long)_n_, sizeof(*(ptr))); \
  })

#endif /* alpha */
#endif
#define __REALLY_HAVE_SG	(__HAVE_SG)

/* 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		  */
#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_FLAG_NOCTX	  0x02

#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_MAX_CTXBITMAP (PAGE_SIZE * 8)

				/* Backward compatibility section */
#ifndef minor
#define minor(x) MINOR((x))
#endif

#ifndef MODULE_LICENSE
#define MODULE_LICENSE(x) 
#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)) {
			ptep = pte_offset_map(pmd, addr);
			pte = *ptep;
			if (pte_present(pte))
				page = pte_page(pte);
			pte_unmap(ptep);
		}
	}
	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)

				/* Macros to make printk easier */
#define DRM_ERROR(fmt, arg...) \
	printk(KERN_ERR "[" DRM_NAME ":%s] *ERROR* " fmt , __FUNCTION__ , ##arg)
#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)

#if DRM_DEBUG_CODE
#define DRM_DEBUG(fmt, arg...)						\
	do {								\
		if ( DRM(flags) & DRM_FLAG_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; }

				/* Mapping helper macros */
#define DRM_IOREMAP(map, dev)					\
	(map)->handle = DRM(ioremap)((map)->offset, (map)->size, (dev) )

#define DRM_IOREMAP_NOCACHE(map, dev)					\
	(map)->handle = DRM(ioremap_nocache)((map)->offset, (map)->size, (dev) )

#define DRM_IOREMAPFREE(map, dev)						\
	do {								\
		if ( (map)->handle && (map)->size )			\
			DRM(ioremapfree)( (map)->handle, (map)->size, (dev) );	\
	} while (0)

#define DRM_FIND_MAP(_map, _o)						\
do {									\
	struct list_head *_list;					\
	list_for_each( _list, &dev->maplist->head ) {			\
		drm_map_list_t *_entry = (drm_map_list_t *)_list;	\
		if ( _entry->map &&					\
		     _entry->map->offset == (_o) ) {			\
			(_map) = _entry->map;				\
			break;						\
 		}							\
	}								\
} while(0)

				/* 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))