/* * Copyright 2005 Stephane Marchesin. * 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 __NOUVEAU_DRV_H__ #define __NOUVEAU_DRV_H__ #define DRIVER_AUTHOR "Stephane Marchesin" #define DRIVER_EMAIL "dri-devel@lists.sourceforge.net" #define DRIVER_NAME "nouveau" #define DRIVER_DESC "nVidia Riva/TNT/GeForce" #define DRIVER_DATE "20060213" #define DRIVER_MAJOR 0 #define DRIVER_MINOR 0 #define DRIVER_PATCHLEVEL 3 #define NOUVEAU_FAMILY 0x0000FFFF #define NOUVEAU_FLAGS 0xFFFF0000 #include "nouveau_drm.h" #include "nouveau_reg.h" struct mem_block { struct mem_block *next; struct mem_block *prev; uint64_t start; uint64_t size; DRMFILE filp; /* 0: free, -1: heap, other: real files */ int flags; drm_local_map_t *map; }; enum nouveau_flags { NV_NFORCE =0x10000000, NV_NFORCE2 =0x20000000 }; struct nouveau_object { struct nouveau_object *next; struct nouveau_object *prev; struct mem_block *instance; uint32_t ht_loc; uint32_t handle; int class; int engine; }; #define NV_DMA_TARGET_VIDMEM 0 #define NV_DMA_TARGET_PCI 2 #define NV_DMA_TARGET_AGP 3 struct nouveau_fifo { int used; /* owner of this fifo */ DRMFILE filp; /* mapping of the fifo itself */ drm_local_map_t *map; /* mapping of the regs controling the fifo */ drm_local_map_t *regs; /* dma object for the command buffer itself */ struct mem_block *cmdbuf_mem; struct nouveau_object *cmdbuf_obj; /* PGRAPH context, for cards that keep it in RAMIN */ struct mem_block *ramin_grctx; /* objects belonging to this fifo */ struct nouveau_object *objs; /* XXX dynamic alloc ? */ uint32_t nv10_pgraph_ctx [340]; }; struct nouveau_config { struct { int location; int size; } cmdbuf; }; typedef struct drm_nouveau_private { /* the card type, takes NV_* as values */ int card_type; /* exact chipset, derived from NV_PMC_BOOT_0 */ int chipset; int flags; drm_local_map_t *mmio; drm_local_map_t *fb; drm_local_map_t *ramin; /* NV40 onwards */ //TODO: Remove me, I'm bogus :) int cur_fifo; struct nouveau_object *fb_obj; int cmdbuf_ch_size; struct mem_block* cmdbuf_alloc; int fifo_alloc_count; struct nouveau_fifo fifos[NV_MAX_FIFO_NUMBER]; /* RAMIN configuration, RAMFC, RAMHT and RAMRO offsets */ uint32_t ramin_size; uint32_t ramht_offset; uint32_t ramht_size; uint32_t ramht_bits; uint32_t ramfc_offset; uint32_t ramfc_size; uint32_t ramro_offset; uint32_t ramro_size; /* base physical adresses */ uint64_t fb_phys; uint64_t agp_phys; /* the mtrr covering the FB */ int fb_mtrr; struct mem_block *agp_heap; struct mem_block *fb_heap; struct mem_block *fb_nomap_heap; struct mem_block *ramin_heap; /* context table pointed to be NV_PGRAPH_CHANNEL_CTX_TABLE (0x400780) */ uint32_t ctx_table_size; struct mem_block *ctx_table; struct nouveau_config config; } drm_nouveau_private_t; /* nouveau_state.c */ extern void nouveau_preclose(drm_device_t * dev, DRMFILE filp); extern int nouveau_load(struct drm_device *dev, unsigned long flags); extern int nouveau_firstopen(struct drm_device *dev); extern void nouveau_lastclose(struct drm_device *dev); extern int nouveau_unload(struct drm_device *dev); extern int nouveau_ioctl_getparam(DRM_IOCTL_ARGS); extern int nouveau_ioctl_setparam(DRM_IOCTL_ARGS); extern void nouveau_wait_for_idle(struct drm_device *dev); /* nouveau_mem.c */ extern uint64_t nouveau_mem_fb_amount(struct drm_device *dev); extern void nouveau_mem_release(DRMFILE filp, struct mem_block *heap); extern int nouveau_ioctl_mem_alloc(DRM_IOCTL_ARGS); extern int nouveau_ioctl_mem_free(DRM_IOCTL_ARGS); extern struct mem_block* nouveau_mem_alloc(struct drm_device *dev, int alignment, uint64_t size, int flags, DRMFILE filp); extern void nouveau_mem_free(struct drm_device* dev, struct mem_block*); extern int nouveau_mem_init(struct drm_device *dev); extern void nouveau_mem_close(struct drm_device *dev); extern int nouveau_instmem_init(struct drm_device *dev, uint32_t offset); extern struct mem_block* nouveau_instmem_alloc(struct drm_device *dev, uint32_t size, uint32_t align); extern void nouveau_instmem_free(struct drm_device *dev, struct mem_block *block); extern uint32_t nouveau_instmem_r32(drm_nouveau_private_t *dev_priv, struct mem_block *mem, int index); extern void nouveau_instmem_w32(drm_nouveau_private_t *dev_priv, struct mem_block *mem, int index, uint32_t val); /* nouveau_fifo.c */ extern int nouveau_fifo_init(drm_device_t *dev); extern int nouveau_fifo_number(drm_device_t *dev); extern void nouveau_fifo_cleanup(drm_device_t *dev, DRMFILE filp); extern int nouveau_fifo_id_get(drm_device_t *dev, DRMFILE filp); extern void nouveau_fifo_free(drm_device_t *dev, int channel); /* nouveau_object.c */ extern void nouveau_object_cleanup(drm_device_t *dev, DRMFILE filp); extern struct nouveau_object *nouveau_dma_object_create(drm_device_t *dev, uint32_t offset, uint32_t size, int access, uint32_t target); extern int nouveau_ioctl_object_init(DRM_IOCTL_ARGS); extern int nouveau_ioctl_dma_object_init(DRM_IOCTL_ARGS); extern uint32_t nouveau_chip_instance_get(drm_device_t *dev, struct mem_block *mem); /* nouveau_irq.c */ extern irqreturn_t nouveau_irq_handler(DRM_IRQ_ARGS); extern void nouveau_irq_preinstall(drm_device_t*); extern void nouveau_irq_postinstall(drm_device_t*); extern void nouveau_irq_uninstall(drm_device_t*); /* nv10_graph.c */ extern void nouveau_nv10_context_switch(drm_device_t *dev); extern int nv10_graph_init(drm_device_t *dev); extern int nv10_graph_context_create(drm_device_t *dev, int channel); /* nv20_graph.c */ extern void nouveau_nv20_context_switch(drm_device_t *dev); extern int nv20_graph_init(drm_device_t *dev); extern int nv20_graph_context_create(drm_device_t *dev, int channel); /* nv30_graph.c */ extern int nv30_graph_init(drm_device_t *dev); extern int nv30_graph_context_create(drm_device_t *dev, int channel); /* nv40_graph.c */ extern int nv40_graph_init(drm_device_t *dev); extern int nv40_graph_context_create(drm_device_t *dev, int channel); extern void nv40_graph_context_save_current(drm_device_t *dev); extern void nv40_graph_context_restore(drm_device_t *dev, int channel); extern long nouveau_compat_ioctl(struct file *filp, unsigned int cmd, unsigned long arg); #if defined(__powerpc__) #define NV_READ(reg) in_be32((void __iomem *)(dev_priv->mmio)->handle + (reg) ) #define NV_WRITE(reg,val) out_be32((void __iomem *)(dev_priv->mmio)->handle + (reg) , (val) ) #else #define NV_READ(reg) DRM_READ32( dev_priv->mmio, (reg) ) #define NV_WRITE(reg,val) DRM_WRITE32( dev_priv->mmio, (reg), (val) ) #endif #define INSTANCE_WR(mem,ofs,val) nouveau_instmem_w32(dev_priv,(mem),(ofs),(val)) #define INSTANCE_RD(mem,ofs) nouveau_instmem_r32(dev_priv,(mem),(ofs)) #endif /* __NOUVEAU_DRV_H__ */ n164' href='#n164'>164 165 166 167 168 169 170 171 172 173 174 175 176 177 178 179 180 181 182 183 184 185 186 187 188 189 190 191 192 193 194 195 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/**
 * \file drm_bufs.h 
 * Generic buffer template
 * 
 * \author Rickard E. (Rik) Faith <faith@valinux.com>
 * \author Gareth Hughes <gareth@valinux.com>
 */

/*
 * Created: Thu Nov 23 03:10:50 2000 by gareth@valinux.com
 *
 * Copyright 1999, 2000 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.
 */

#include <linux/vmalloc.h>
#include "drmP.h"

/**
 * Compute size order.  Returns the exponent of the smaller power of two which
 * is greater or equal to given number.
 * 
 * \param size size.
 * \return order.
 *
 * \todo Can be made faster.
 */
int DRM(order)( unsigned long size )
{
	int order;
	unsigned long tmp;

	for (order = 0, tmp = size >> 1; tmp; tmp >>= 1, order++)
		;

	if (size & (size - 1))
		++order;

	return order;
}

static int permanent_maps = 0; 
 /**
 * Adjusts the memory offset to its absolute value according to the mapping
 * type.  Adds the map to the map list drm_device::maplist. Adds MTRR's where
 * applicable and if supported by the kernel.
 */
int DRM(initmap)( drm_device_t *dev, unsigned int offset, unsigned int size, int type, int flags )
{
	drm_map_t *map;
	drm_map_list_t *list;

	DRM_DEBUG("\n");

	if ( (offset & (~PAGE_MASK)) || (size & (~PAGE_MASK)) )
		return -EINVAL;
#if !defined(__sparc__) && !defined(__alpha__)
	if ( offset + size < offset || offset < virt_to_phys(high_memory) )
		return -EINVAL;
#endif
	if ( !(list = DRM(alloc)( sizeof(*list), DRM_MEM_MAPS )))
		return -ENOMEM;
	memset(list, 0, sizeof(*list));
		
	if ( !(map = DRM(alloc)( sizeof(*map), DRM_MEM_MAPS ))) {
		DRM(free)(list, sizeof(*list), DRM_MEM_MAPS);
		return -ENOMEM;
	}

	*map = (drm_map_t){
		.offset = offset,
		.size = size,
		.type = type,
		.flags = flags,
		.mtrr = -1,
		.handle = 0,
	};
	list->map = map;

	DRM_DEBUG( "initmap offset = 0x%08lx, size = 0x%08lx, type = %d\n",
		   map->offset, map->size, map->type );
        
#ifdef __alpha__
	map->offset += dev->hose->mem_space->start;
#endif
	if (drm_core_has_MTRR(dev)) {
		if ( map->type == _DRM_FRAME_BUFFER ||
		     (map->flags & _DRM_WRITE_COMBINING) ) {
			map->mtrr = mtrr_add( map->offset, map->size,
					      MTRR_TYPE_WRCOMB, 1 );
		}
	}

	if (map->type == _DRM_REGISTERS)
		map->handle = DRM(ioremap)( map->offset, map->size, dev );

	down(&dev->struct_sem);
	list_add(&list->head, &dev->maplist->head);
	up(&dev->struct_sem);
	
	permanent_maps = 1;
	DRM_DEBUG("finished\n");

	return 0;
}

/**
 * Ioctl to specify a range of memory that is available for mapping by a non-root process.
 *
 * \param inode device inode.
 * \param filp file pointer.
 * \param cmd command.
 * \param arg pointer to a drm_map structure.
 * \return zero on success or a negative value on error.
 *
 * Adjusts the memory offset to its absolute value according to the mapping
 * type.  Adds the map to the map list drm_device::maplist. Adds MTRR's where
 * applicable and if supported by the kernel.
 */
int DRM(addmap)( struct inode *inode, struct file *filp,
		 unsigned int cmd, unsigned long arg )
{
	drm_file_t *priv = filp->private_data;
	drm_device_t *dev = priv->dev;
	drm_map_t *map;
	drm_map_t __user *argp = (void __user *)arg;
	drm_map_list_t *list;

	if ( !(filp->f_mode & 3) ) return -EACCES; /* Require read/write */

	map = DRM(alloc)( sizeof(*map), DRM_MEM_MAPS );
	if ( !map )
		return -ENOMEM;

	if ( copy_from_user( map, argp, sizeof(*map) ) ) {
		DRM(free)( map, sizeof(*map), DRM_MEM_MAPS );
		return -EFAULT;
	}

	/* Only allow shared memory to be removable since we only keep enough
	 * book keeping information about shared memory to allow for removal
	 * when processes fork.
	 */
	if ( (map->flags & _DRM_REMOVABLE) && map->type != _DRM_SHM ) {
		DRM(free)( map, sizeof(*map), DRM_MEM_MAPS );
		return -EINVAL;
	}
	DRM_DEBUG( "offset = 0x%08lx, size = 0x%08lx, type = %d\n",
		   map->offset, map->size, map->type );
	if ( (map->offset & (~PAGE_MASK)) || (map->size & (~PAGE_MASK)) ) {
		DRM(free)( map, sizeof(*map), DRM_MEM_MAPS );
		return -EINVAL;
	}
	map->mtrr   = -1;
	map->handle = NULL;

	switch ( map->type ) {
	case _DRM_REGISTERS:
	case _DRM_FRAME_BUFFER: {
		/* after all the drivers switch to permanent mapping this should just return an error */
        	struct list_head *_list;

		/* If permanent maps are implemented, maps must match */
		if (permanent_maps) {
			DRM_DEBUG( "Looking for: offset = 0x%08lx, size = 0x%08lx, type = %d\n",
				map->offset, map->size, map->type );
			list_for_each( _list, &dev->maplist->head ) {
				drm_map_list_t *_entry = list_entry( _list, drm_map_list_t, head );
				DRM_DEBUG( "Checking: offset = 0x%08lx, size = 0x%08lx, type = %d\n",
					_entry->map->offset, _entry->map->size, _entry->map->type );
				if ( _entry->map && map->type == _entry->map->type  &&
						map->offset == _entry->map->offset ) {
					_entry->map->size = map->size;
					DRM(free)( map, sizeof(*map), DRM_MEM_MAPS );
					map = _entry->map;
					DRM_DEBUG( "Found existing: offset = 0x%08lx, size = 0x%08lx, type = %d\n",
						map->offset, map->size, map->type );
					goto found_it;
				}
			}
			/* addmap didn't match an existing permanent map, that's an error */
			return -EINVAL;
		}
#if !defined(__sparc__) && !defined(__alpha__) && !defined(__ia64__)
		if ( map->offset + map->size < map->offset ||
		     map->offset < virt_to_phys(high_memory) ) {
			DRM(free)( map, sizeof(*map), DRM_MEM_MAPS );
			return -EINVAL;
		}
#endif
#ifdef __alpha__
		map->offset += dev->hose->mem_space->start;
#endif
		if (drm_core_has_MTRR(dev)) {
			if ( map->type == _DRM_FRAME_BUFFER ||
			     (map->flags & _DRM_WRITE_COMBINING) ) {
				map->mtrr = mtrr_add( map->offset, map->size,
						      MTRR_TYPE_WRCOMB, 1 );
			}
		}
		if (map->type == _DRM_REGISTERS)
			map->handle = DRM(ioremap)( map->offset, map->size,
						    dev );
		break;
	}
	case _DRM_SHM:
		map->handle = vmalloc_32(map->size);
		DRM_DEBUG( "%lu %d %p\n",
			   map->size, DRM(order)( map->size ), map->handle );
		if ( !map->handle ) {
			DRM(free)( map, sizeof(*map), DRM_MEM_MAPS );
			return -ENOMEM;
		}
		map->offset = (unsigned long)map->handle;
		if ( map->flags & _DRM_CONTAINS_LOCK ) {
			/* Prevent a 2nd X Server from creating a 2nd lock */
			if (dev->lock.hw_lock != NULL) {
				vfree( map->handle );
				DRM(free)( map, sizeof(*map), DRM_MEM_MAPS );
				return -EBUSY;
			}
			dev->sigdata.lock =
			dev->lock.hw_lock = map->handle; /* Pointer to lock */
		}
		break;
	case _DRM_AGP:
		if (drm_core_has_AGP(dev)) {
#ifdef __alpha__
			map->offset += dev->hose->mem_space->start;
#endif
			map->offset += dev->agp->base;
			map->mtrr   = dev->agp->agp_mtrr; /* for getmap */
		}
		break;
	case _DRM_SCATTER_GATHER:
		if (!dev->sg) {
			DRM(free)(map, sizeof(*map), DRM_MEM_MAPS);
			return -EINVAL;
		}
		map->offset += dev->sg->handle;
		break;

	default:
		DRM(free)( map, sizeof(*map), DRM_MEM_MAPS );
		return -EINVAL;
	}

	list = DRM(alloc)(sizeof(*list), DRM_MEM_MAPS);
	if(!list) {
		DRM(free)(map, sizeof(*map), DRM_MEM_MAPS);
		return -EINVAL;
	}
	memset(list, 0, sizeof(*list));
	list->map = map;

	down(&dev->struct_sem);
	list_add(&list->head, &dev->maplist->head);
 	up(&dev->struct_sem);
found_it:
	if ( copy_to_user( argp, map, sizeof(*map) ) )
		return -EFAULT;
	if ( map->type != _DRM_SHM ) {
		if ( copy_to_user( &argp->handle,
				   &map->offset,
				   sizeof(map->offset) ) )
			return -EFAULT;
	}
	return 0;
}


/**
 * Remove a map private from list and deallocate resources if the mapping
 * isn't in use.
 *
 * \param inode device inode.
 * \param filp file pointer.
 * \param cmd command.
 * \param arg pointer to a drm_map_t structure.
 * \return zero on success or a negative value on error.
 *
 * Searches the map on drm_device::maplist, removes it from the list, see if
 * its being used, and free any associate resource (such as MTRR's) if it's not
 * being on use.
 *
 * \sa addmap().
 */
int DRM(rmmap)(struct inode *inode, struct file *filp,
	       unsigned int cmd, unsigned long arg)
{
	drm_file_t	*priv	= filp->private_data;
	drm_device_t	*dev	= priv->dev;
	struct list_head *list;
	drm_map_list_t *r_list = NULL;
	drm_vma_entry_t *pt, *prev;
	drm_map_t *map;
	drm_map_t request;
	int found_maps = 0;

	if (copy_from_user(&request, (drm_map_t __user *)arg,
			   sizeof(request))) {
		return -EFAULT;
	}
	
	down(&dev->struct_sem);
	list = &dev->maplist->head;
	list_for_each(list, &dev->maplist->head) {
		r_list = list_entry(list, drm_map_list_t, head);

		if(r_list->map &&
		   r_list->map->handle == request.handle &&
		   r_list->map->flags & _DRM_REMOVABLE) break;
	}

	/* List has wrapped around to the head pointer, or its empty we didn't
	 * find anything.
	 */
	if(list == (&dev->maplist->head)) {
		up(&dev->struct_sem);
		return -EINVAL;
	}
	map = r_list->map;
	
	/* Register and framebuffer maps are permanent */
	if ((map->type == _DRM_REGISTERS) || (map->type == _DRM_FRAME_BUFFER)) {
		up(&dev->struct_sem);
		return 0;
	}
	list_del(list);
	DRM(free)(list, sizeof(*list), DRM_MEM_MAPS);

	for (pt = dev->vmalist, prev = NULL; pt; prev = pt, pt = pt->next) {
		if (pt->vma->vm_private_data == map) found_maps++;
	}

	if(!found_maps) {
		switch (map->type) {
		case _DRM_REGISTERS:
		case _DRM_FRAME_BUFFER:
			break;  /* Can't get here, make compiler happy */
		case _DRM_SHM:
			vfree(map->handle);
			break;
		case _DRM_AGP:
		case _DRM_SCATTER_GATHER:
			break;
		}
		DRM(free)(map, sizeof(*map), DRM_MEM_MAPS);
	}
	up(&dev->struct_sem);
	return 0;
}

/**
 * Cleanup after an error on one of the addbufs() functions.
 *
 * \param dev DRM device.
 * \param entry buffer entry where the error occurred.
 *
 * Frees any pages and buffers associated with the given entry.
 */
static void DRM(cleanup_buf_error)(drm_device_t *dev, drm_buf_entry_t *entry)
{
	int i;

	if (entry->seg_count) {
		for (i = 0; i < entry->seg_count; i++) {
			if (entry->seglist[i]) {
				DRM(free_pages)(entry->seglist[i],
					        entry->page_order,
					        DRM_MEM_DMA);
			}
		}
		DRM(free)(entry->seglist,
			  entry->seg_count *
			  sizeof(*entry->seglist),
			  DRM_MEM_SEGS);

		entry->seg_count = 0;
	}

   	if (entry->buf_count) {
	   	for (i = 0; i < entry->buf_count; i++) {
			if (entry->buflist[i].dev_private) {
				DRM(free)(entry->buflist[i].dev_private,
					  entry->buflist[i].dev_priv_size,
					  DRM_MEM_BUFS);
			}
		}
		DRM(free)(entry->buflist,
			  entry->buf_count *
			  sizeof(*entry->buflist),
			  DRM_MEM_BUFS);

		entry->buf_count = 0;
	}
}

#if __OS_HAS_AGP
/**
 * Add AGP buffers for DMA transfers (ioctl).
 *
 * \param inode device inode.
 * \param filp file pointer.
 * \param cmd command.
 * \param arg pointer to a drm_buf_desc_t request.
 * \return zero on success or a negative number on failure.
 * 
 * After some sanity checks creates a drm_buf structure for each buffer and
 * reallocates the buffer list of the same size order to accommodate the new
 * buffers.
 */
int DRM(addbufs_agp)( struct inode *inode, struct file *filp,
		      unsigned int cmd, unsigned long arg )
{
	drm_file_t *priv = filp->private_data;
	drm_device_t *dev = priv->dev;
	drm_device_dma_t *dma = dev->dma;
	drm_buf_desc_t request;
	drm_buf_entry_t *entry;
	drm_buf_t *buf;
	unsigned long offset;
	unsigned long agp_offset;
	int count;
	int order;
	int size;
	int alignment;
	int page_order;
	int total;
	int byte_count;
	int i;
	drm_buf_t **temp_buflist;
	drm_buf_desc_t __user *argp = (void __user *)arg;

	if ( !dma ) return -EINVAL;

	if ( copy_from_user( &request, argp,
			     sizeof(request) ) )
		return -EFAULT;

	count = request.count;
	order = DRM(order)( request.size );
	size = 1 << order;

	alignment  = (request.flags & _DRM_PAGE_ALIGN)
		? PAGE_ALIGN(size) : size;
	page_order = order - PAGE_SHIFT > 0 ? order - PAGE_SHIFT : 0;
	total = PAGE_SIZE << page_order;

	byte_count = 0;
	agp_offset = dev->agp->base + request.agp_start;

	DRM_DEBUG( "count:      %d\n",  count );
	DRM_DEBUG( "order:      %d\n",  order );
	DRM_DEBUG( "size:       %d\n",  size );
	DRM_DEBUG( "agp_offset: %lu\n", agp_offset );
	DRM_DEBUG( "alignment:  %d\n",  alignment );
	DRM_DEBUG( "page_order: %d\n",  page_order );
	DRM_DEBUG( "total:      %d\n",  total );

	if ( order < DRM_MIN_ORDER || order > DRM_MAX_ORDER ) return -EINVAL;
	if ( dev->queue_count ) return -EBUSY; /* Not while in use */

	spin_lock( &dev->count_lock );
	if ( dev->buf_use ) {
		spin_unlock( &dev->count_lock );
		return -EBUSY;
	}
	atomic_inc( &dev->buf_alloc );
	spin_unlock( &dev->count_lock );

	down( &dev->struct_sem );
	entry = &dma->bufs[order];
	if ( entry->buf_count ) {
		up( &dev->struct_sem );
		atomic_dec( &dev->buf_alloc );
		return -ENOMEM; /* May only call once for each order */
	}

	if (count < 0 || count > 4096) {
		up( &dev->struct_sem );
		atomic_dec( &dev->buf_alloc );
		return -EINVAL;
	}

	entry->buflist = DRM(alloc)( count * sizeof(*entry->buflist),
				    DRM_MEM_BUFS );
	if ( !entry->buflist ) {
		up( &dev->struct_sem );
		atomic_dec( &dev->buf_alloc );
		return -ENOMEM;
	}
	memset( entry->buflist, 0, count * sizeof(*entry->buflist) );

	entry->buf_size = size;
	entry->page_order = page_order;

	offset = 0;

	while ( entry->buf_count < count ) {
		buf          = &entry->buflist[entry->buf_count];
		buf->idx     = dma->buf_count + entry->buf_count;
		buf->total   = alignment;
		buf->order   = order;
		buf->used    = 0;

		buf->offset  = (dma->byte_count + offset);
		buf->bus_address = agp_offset + offset;
		buf->address = (void *)(agp_offset + offset);
		buf->next    = NULL;
		buf->waiting = 0;
		buf->pending = 0;
		init_waitqueue_head( &buf->dma_wait );
		buf->filp    = NULL;

		buf->dev_priv_size = dev->dev_priv_size;
		buf->dev_private = DRM(alloc)( buf->dev_priv_size,
					       DRM_MEM_BUFS );
		if(!buf->dev_private) {
			/* Set count correctly so we free the proper amount. */
			entry->buf_count = count;
			DRM(cleanup_buf_error)(dev,entry);
			up( &dev->struct_sem );
			atomic_dec( &dev->buf_alloc );
			return -ENOMEM;
		}
		memset( buf->dev_private, 0, buf->dev_priv_size );

		DRM_DEBUG( "buffer %d @ %p\n",
			   entry->buf_count, buf->address );

		offset += alignment;
		entry->buf_count++;
		byte_count += PAGE_SIZE << page_order;
	}

	DRM_DEBUG( "byte_count: %d\n", byte_count );

	temp_buflist = DRM(realloc)( dma->buflist,
				     dma->buf_count * sizeof(*dma->buflist),
				     (dma->buf_count + entry->buf_count)
				     * sizeof(*dma->buflist),
				     DRM_MEM_BUFS );
	if(!temp_buflist) {
		/* Free the entry because it isn't valid */
		DRM(cleanup_buf_error)(dev,entry);
		up( &dev->struct_sem );
		atomic_dec( &dev->buf_alloc );
		return -ENOMEM;
	}
	dma->buflist = temp_buflist;

	for ( i = 0 ; i < entry->buf_count ; i++ ) {
		dma->buflist[i + dma->buf_count] = &entry->buflist[i];
	}

	dma->buf_count += entry->buf_count;
	dma->byte_count += byte_count;

	DRM_DEBUG( "dma->buf_count : %d\n", dma->buf_count );
	DRM_DEBUG( "entry->buf_count : %d\n", entry->buf_count );

	up( &dev->struct_sem );

	request.count = entry->buf_count;
	request.size = size;

	if ( copy_to_user( argp, &request, sizeof(request) ) )
		return -EFAULT;

	dma->flags = _DRM_DMA_USE_AGP;

	atomic_dec( &dev->buf_alloc );
	return 0;
}
#endif /* __OS_HAS_AGP */

int DRM(addbufs_pci)( struct inode *inode, struct file *filp,
		      unsigned int cmd, unsigned long arg )
{
   	drm_file_t *priv = filp->private_data;
	drm_device_t *dev = priv->dev;
	drm_device_dma_t *dma = dev->dma;
	drm_buf_desc_t request;
	int count;
	int order;
	int size;
	int total;
	int page_order;
	drm_buf_entry_t *entry;
	unsigned long page;
	drm_buf_t *buf;
	int alignment;
	unsigned long offset;
	int i;
	int byte_count;
	int page_count;
	unsigned long *temp_pagelist;
	drm_buf_t **temp_buflist;
	drm_buf_desc_t __user *argp = (void __user *)arg;

	if (!drm_core_check_feature(dev, DRIVER_PCI_DMA)) return -EINVAL;

	if ( !dma ) return -EINVAL;

	if ( copy_from_user( &request, argp, sizeof(request) ) )
		return -EFAULT;

	count = request.count;
	order = DRM(order)( request.size );
	size = 1 << order;

	DRM_DEBUG( "count=%d, size=%d (%d), order=%d, queue_count=%d\n",
		   request.count, request.size, size,
		   order, dev->queue_count );

	if ( order < DRM_MIN_ORDER || order > DRM_MAX_ORDER ) return -EINVAL;
	if ( dev->queue_count ) return -EBUSY; /* Not while in use */

	alignment = (request.flags & _DRM_PAGE_ALIGN)
		? PAGE_ALIGN(size) : size;
	page_order = order - PAGE_SHIFT > 0 ? order - PAGE_SHIFT : 0;
	total = PAGE_SIZE << page_order;

	spin_lock( &dev->count_lock );
	if ( dev->buf_use ) {
		spin_unlock( &dev->count_lock );
		return -EBUSY;
	}
	atomic_inc( &dev->buf_alloc );
	spin_unlock( &dev->count_lock );

	down( &dev->struct_sem );
	entry = &dma->bufs[order];
	if ( entry->buf_count ) {
		up( &dev->struct_sem );
		atomic_dec( &dev->buf_alloc );
		return -ENOMEM;	/* May only call once for each order */
	}

	if (count < 0 || count > 4096) {
		up( &dev->struct_sem );
		atomic_dec( &dev->buf_alloc );
		return -EINVAL;
	}

	entry->buflist = DRM(alloc)( count * sizeof(*entry->buflist),
				    DRM_MEM_BUFS );
	if ( !entry->buflist ) {
		up( &dev->struct_sem );
		atomic_dec( &dev->buf_alloc );
		return -ENOMEM;
	}
	memset( entry->buflist, 0, count * sizeof(*entry->buflist) );

	entry->seglist = DRM(alloc)( count * sizeof(*entry->seglist),
				    DRM_MEM_SEGS );
	if ( !entry->seglist ) {
		DRM(free)( entry->buflist,
			  count * sizeof(*entry->buflist),
			  DRM_MEM_BUFS );
		up( &dev->struct_sem );
		atomic_dec( &dev->buf_alloc );
		return -ENOMEM;
	}
	memset( entry->seglist, 0, count * sizeof(*entry->seglist) );

	/* Keep the original pagelist until we know all the allocations
	 * have succeeded
	 */
	temp_pagelist = DRM(alloc)( (dma->page_count + (count << page_order))
				    * sizeof(*dma->pagelist),
				    DRM_MEM_PAGES );
	if (!temp_pagelist) {
		DRM(free)( entry->buflist,
			   count * sizeof(*entry->buflist),
			   DRM_MEM_BUFS );
		DRM(free)( entry->seglist,
			   count * sizeof(*entry->seglist),
			   DRM_MEM_SEGS );
		up( &dev->struct_sem );
		atomic_dec( &dev->buf_alloc );
		return -ENOMEM;
	}
	memcpy(temp_pagelist,
	       dma->pagelist,
	       dma->page_count * sizeof(*dma->pagelist));
	DRM_DEBUG( "pagelist: %d entries\n",
		   dma->page_count + (count << page_order) );

	entry->buf_size	= size;
	entry->page_order = page_order;
	byte_count = 0;
	page_count = 0;

	while ( entry->buf_count < count ) {
		page = DRM(alloc_pages)( page_order, DRM_MEM_DMA );
		if ( !page ) {
			/* Set count correctly so we free the proper amount. */
			entry->buf_count = count;
			entry->seg_count = count;
			DRM(cleanup_buf_error)(dev,entry);
			DRM(free)( temp_pagelist,
				   (dma->page_count + (count << page_order))
				   * sizeof(*dma->pagelist),
				   DRM_MEM_PAGES );
			up( &dev->struct_sem );
			atomic_dec( &dev->buf_alloc );
			return -ENOMEM;
		}
		entry->seglist[entry->seg_count++] = page;
		for ( i = 0 ; i < (1 << page_order) ; i++ ) {
			DRM_DEBUG( "page %d @ 0x%08lx\n",
				   dma->page_count + page_count,
				   page + PAGE_SIZE * i );
			temp_pagelist[dma->page_count + page_count++]
				= page + PAGE_SIZE * i;
		}
		for ( offset = 0 ;
		      offset + size <= total && entry->buf_count < count ;
		      offset += alignment, ++entry->buf_count ) {
			buf	     = &entry->buflist[entry->buf_count];