drm_bufs.h
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上传日期:2013-02-24
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- /* drm_bufs.h -- Generic buffer template -*- linux-c -*-
- * 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.
- *
- * Authors:
- * Rickard E. (Rik) Faith <faith@valinux.com>
- * Gareth Hughes <gareth@valinux.com>
- */
- #define __NO_VERSION__
- #include <linux/vmalloc.h>
- #include "drmP.h"
- #ifndef __HAVE_PCI_DMA
- #define __HAVE_PCI_DMA 0
- #endif
- #ifndef __HAVE_SG
- #define __HAVE_SG 0
- #endif
- #ifndef DRIVER_BUF_PRIV_T
- #define DRIVER_BUF_PRIV_T u32
- #endif
- #ifndef DRIVER_AGP_BUFFERS_MAP
- #if __HAVE_AGP && __HAVE_DMA
- #error "You must define DRIVER_AGP_BUFFERS_MAP()"
- #else
- #define DRIVER_AGP_BUFFERS_MAP( dev ) NULL
- #endif
- #endif
- /*
- * Compute order. Can be made faster.
- */
- int DRM(order)( unsigned long size )
- {
- int order;
- unsigned long tmp;
- for ( order = 0, tmp = size ; tmp >>= 1 ; ++order );
- if ( size & ~(1 << order) )
- ++order;
- return order;
- }
- 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_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, (drm_map_t *)arg, 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 = %dn",
- 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 = 0;
- switch ( map->type ) {
- case _DRM_REGISTERS:
- case _DRM_FRAME_BUFFER:
- #if !defined(__sparc__) && !defined(__alpha__)
- 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 __REALLY_HAVE_MTRR
- if ( map->type == _DRM_FRAME_BUFFER ||
- (map->flags & _DRM_WRITE_COMBINING) ) {
- map->mtrr = mtrr_add( map->offset, map->size,
- MTRR_TYPE_WRCOMB, 1 );
- }
- #endif
- map->handle = DRM(ioremap)( map->offset, map->size );
- break;
- case _DRM_SHM:
- map->handle = vmalloc_32(map->size);
- DRM_DEBUG( "%ld %d %pn",
- 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 ) {
- dev->lock.hw_lock = map->handle; /* Pointer to lock */
- }
- break;
- #if __REALLY_HAVE_AGP
- case _DRM_AGP:
- #ifdef __alpha__
- map->offset += dev->hose->mem_space->start;
- #endif
- map->offset = map->offset + dev->agp->base;
- map->mtrr = dev->agp->agp_mtrr; /* for getmap */
- break;
- #endif
- case _DRM_SCATTER_GATHER:
- if (!dev->sg) {
- DRM(free)(map, sizeof(*map), DRM_MEM_MAPS);
- return -EINVAL;
- }
- map->offset = 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);
- if ( copy_to_user( (drm_map_t *)arg, map, sizeof(*map) ) )
- return -EFAULT;
- if ( map->type != _DRM_SHM ) {
- if ( copy_to_user( &((drm_map_t *)arg)->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.
- */
- 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 *)arg,
- sizeof(request))) {
- return -EFAULT;
- }
- down(&dev->struct_sem);
- list = &dev->maplist->head;
- list_for_each(list, &dev->maplist->head) {
- r_list = (drm_map_list_t *) list;
- 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;
- list_del(list);
- DRM(free)(list, sizeof(*list), DRM_MEM_MAPS);
- for (pt = dev->vmalist, prev = NULL; pt; prev = pt, pt = pt->next) {
- #if LINUX_VERSION_CODE >= 0x020300
- if (pt->vma->vm_private_data == map) found_maps++;
- #else
- if (pt->vma->vm_pte == map) found_maps++;
- #endif
- }
- if(!found_maps) {
- switch (map->type) {
- case _DRM_REGISTERS:
- case _DRM_FRAME_BUFFER:
- #if __REALLY_HAVE_MTRR
- if (map->mtrr >= 0) {
- int retcode;
- retcode = mtrr_del(map->mtrr,
- map->offset,
- map->size);
- DRM_DEBUG("mtrr_del = %dn", retcode);
- }
- #endif
- DRM(ioremapfree)(map->handle, map->size);
- break;
- 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;
- }
- #if __HAVE_DMA
- static void DRM(cleanup_buf_error)(drm_buf_entry_t *entry)
- {
- int i;
- if (entry->seg_count) {
- for (i = 0; i < entry->seg_count; 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);
- #if __HAVE_DMA_FREELIST
- DRM(freelist_destroy)(&entry->freelist);
- #endif
- entry->buf_count = 0;
- }
- }
- #if __REALLY_HAVE_AGP
- 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;
- if ( !dma ) return -EINVAL;
- if ( copy_from_user( &request, (drm_buf_desc_t *)arg,
- 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: %dn", count );
- DRM_DEBUG( "order: %dn", order );
- DRM_DEBUG( "size: %dn", size );
- DRM_DEBUG( "agp_offset: %ldn", agp_offset );
- DRM_DEBUG( "alignment: %dn", alignment );
- DRM_DEBUG( "page_order: %dn", page_order );
- DRM_DEBUG( "total: %dn", 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->pid = 0;
- buf->dev_priv_size = sizeof(DRIVER_BUF_PRIV_T);
- buf->dev_private = DRM(alloc)( sizeof(DRIVER_BUF_PRIV_T),
- DRM_MEM_BUFS );
- if(!buf->dev_private) {
- /* Set count correctly so we free the proper amount. */
- entry->buf_count = count;
- DRM(cleanup_buf_error)(entry);
- }
- memset( buf->dev_private, 0, buf->dev_priv_size );
- #if __HAVE_DMA_HISTOGRAM
- buf->time_queued = 0;
- buf->time_dispatched = 0;
- buf->time_completed = 0;
- buf->time_freed = 0;
- #endif
- DRM_DEBUG( "buffer %d @ %pn",
- entry->buf_count, buf->address );
- offset += alignment;
- entry->buf_count++;
- byte_count += PAGE_SIZE << page_order;
- }
- DRM_DEBUG( "byte_count: %dn", 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)(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 : %dn", dma->buf_count );
- DRM_DEBUG( "entry->buf_count : %dn", entry->buf_count );
- #if __HAVE_DMA_FREELIST
- DRM(freelist_create)( &entry->freelist, entry->buf_count );
- for ( i = 0 ; i < entry->buf_count ; i++ ) {
- DRM(freelist_put)( dev, &entry->freelist, &entry->buflist[i] );
- }
- #endif
- up( &dev->struct_sem );
- request.count = entry->buf_count;
- request.size = size;
- if ( copy_to_user( (drm_buf_desc_t *)arg, &request, sizeof(request) ) )
- return -EFAULT;
- dma->flags = _DRM_DMA_USE_AGP;
- atomic_dec( &dev->buf_alloc );
- return 0;
- }
- #endif /* __REALLY_HAVE_AGP */
- #if __HAVE_PCI_DMA
- 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;
- if ( !dma ) return -EINVAL;
- if ( copy_from_user( &request, (drm_buf_desc_t *)arg,
- 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=%dn",
- 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) );
- temp_pagelist = DRM(realloc)( dma->pagelist,
- dma->page_count * sizeof(*dma->pagelist),
- (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;
- }
- dma->pagelist = temp_pagelist;
- DRM_DEBUG( "pagelist: %d entriesn",
- 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 ) break;
- entry->seglist[entry->seg_count++] = page;
- for ( i = 0 ; i < (1 << page_order) ; i++ ) {
- DRM_DEBUG( "page %d @ 0x%08lxn",
- dma->page_count + page_count,
- page + PAGE_SIZE * i );
- dma->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];
- buf->idx = dma->buf_count + entry->buf_count;
- buf->total = alignment;
- buf->order = order;
- buf->used = 0;
- buf->offset = (dma->byte_count + byte_count + offset);
- buf->address = (void *)(page + offset);
- buf->next = NULL;
- buf->waiting = 0;
- buf->pending = 0;
- init_waitqueue_head( &buf->dma_wait );
- buf->pid = 0;
- #if __HAVE_DMA_HISTOGRAM
- buf->time_queued = 0;
- buf->time_dispatched = 0;
- buf->time_completed = 0;
- buf->time_freed = 0;
- #endif
- DRM_DEBUG( "buffer %d @ %pn",
- entry->buf_count, buf->address );
- }
- byte_count += PAGE_SIZE << page_order;
- }
- 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)(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->seg_count += entry->seg_count;
- dma->page_count += entry->seg_count << page_order;
- dma->byte_count += PAGE_SIZE * (entry->seg_count << page_order);
- #if __HAVE_DMA_FREELIST
- DRM(freelist_create)( &entry->freelist, entry->buf_count );
- for ( i = 0 ; i < entry->buf_count ; i++ ) {
- DRM(freelist_put)( dev, &entry->freelist, &entry->buflist[i] );
- }
- #endif
- up( &dev->struct_sem );
- request.count = entry->buf_count;
- request.size = size;
- if ( copy_to_user( (drm_buf_desc_t *)arg, &request, sizeof(request) ) )
- return -EFAULT;
- atomic_dec( &dev->buf_alloc );
- return 0;
- }
- #endif /* __HAVE_PCI_DMA */
- #ifdef __HAVE_SG
- int DRM(addbufs_sg)( 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;
- if ( !dma ) return -EINVAL;
- if ( copy_from_user( &request, (drm_buf_desc_t *)arg,
- 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 = request.agp_start;
- DRM_DEBUG( "count: %dn", count );
- DRM_DEBUG( "order: %dn", order );
- DRM_DEBUG( "size: %dn", size );
- DRM_DEBUG( "agp_offset: %ldn", agp_offset );
- DRM_DEBUG( "alignment: %dn", alignment );
- DRM_DEBUG( "page_order: %dn", page_order );
- DRM_DEBUG( "total: %dn", 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 + dev->sg->handle);
- buf->next = NULL;
- buf->waiting = 0;
- buf->pending = 0;
- init_waitqueue_head( &buf->dma_wait );
- buf->pid = 0;
- buf->dev_priv_size = sizeof(DRIVER_BUF_PRIV_T);
- buf->dev_private = DRM(alloc)( sizeof(DRIVER_BUF_PRIV_T),
- DRM_MEM_BUFS );
- if(!buf->dev_private) {
- /* Set count correctly so we free the proper amount. */
- entry->buf_count = count;
- DRM(cleanup_buf_error)(entry);
- up( &dev->struct_sem );
- atomic_dec( &dev->buf_alloc );
- return -ENOMEM;
- }
- memset( buf->dev_private, 0, buf->dev_priv_size );
- # if __HAVE_DMA_HISTOGRAM
- buf->time_queued = 0;
- buf->time_dispatched = 0;
- buf->time_completed = 0;
- buf->time_freed = 0;
- # endif
- DRM_DEBUG( "buffer %d @ %pn",
- entry->buf_count, buf->address );
- offset += alignment;
- entry->buf_count++;
- byte_count += PAGE_SIZE << page_order;
- }
- DRM_DEBUG( "byte_count: %dn", 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)(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 : %dn", dma->buf_count );
- DRM_DEBUG( "entry->buf_count : %dn", entry->buf_count );
- #if __HAVE_DMA_FREELIST
- DRM(freelist_create)( &entry->freelist, entry->buf_count );
- for ( i = 0 ; i < entry->buf_count ; i++ ) {
- DRM(freelist_put)( dev, &entry->freelist, &entry->buflist[i] );
- }
- #endif
- up( &dev->struct_sem );
- request.count = entry->buf_count;
- request.size = size;
- if ( copy_to_user( (drm_buf_desc_t *)arg, &request, sizeof(request) ) )
- return -EFAULT;
- dma->flags = _DRM_DMA_USE_SG;
- atomic_dec( &dev->buf_alloc );
- return 0;
- }
- #endif /* __HAVE_SG */
- int DRM(addbufs)( struct inode *inode, struct file *filp,
- unsigned int cmd, unsigned long arg )
- {
- drm_buf_desc_t request;
- if ( copy_from_user( &request, (drm_buf_desc_t *)arg,
- sizeof(request) ) )
- return -EFAULT;
- #if __REALLY_HAVE_AGP
- if ( request.flags & _DRM_AGP_BUFFER )
- return DRM(addbufs_agp)( inode, filp, cmd, arg );
- else
- #endif
- #if __HAVE_SG
- if ( request.flags & _DRM_SG_BUFFER )
- return DRM(addbufs_sg)( inode, filp, cmd, arg );
- else
- #endif
- #if __HAVE_PCI_DMA
- return DRM(addbufs_pci)( inode, filp, cmd, arg );
- #else
- return -EINVAL;
- #endif
- }
- int DRM(infobufs)( 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_info_t request;
- int i;
- int count;
- if ( !dma ) return -EINVAL;
- spin_lock( &dev->count_lock );
- if ( atomic_read( &dev->buf_alloc ) ) {
- spin_unlock( &dev->count_lock );
- return -EBUSY;
- }
- ++dev->buf_use; /* Can't allocate more after this call */
- spin_unlock( &dev->count_lock );
- if ( copy_from_user( &request,
- (drm_buf_info_t *)arg,
- sizeof(request) ) )
- return -EFAULT;
- for ( i = 0, count = 0 ; i < DRM_MAX_ORDER + 1 ; i++ ) {
- if ( dma->bufs[i].buf_count ) ++count;
- }
- DRM_DEBUG( "count = %dn", count );
- if ( request.count >= count ) {
- for ( i = 0, count = 0 ; i < DRM_MAX_ORDER + 1 ; i++ ) {
- if ( dma->bufs[i].buf_count ) {
- drm_buf_desc_t *to = &request.list[count];
- drm_buf_entry_t *from = &dma->bufs[i];
- drm_freelist_t *list = &dma->bufs[i].freelist;
- if ( copy_to_user( &to->count,
- &from->buf_count,
- sizeof(from->buf_count) ) ||
- copy_to_user( &to->size,
- &from->buf_size,
- sizeof(from->buf_size) ) ||
- copy_to_user( &to->low_mark,
- &list->low_mark,
- sizeof(list->low_mark) ) ||
- copy_to_user( &to->high_mark,
- &list->high_mark,
- sizeof(list->high_mark) ) )
- return -EFAULT;
- DRM_DEBUG( "%d %d %d %d %dn",
- i,
- dma->bufs[i].buf_count,
- dma->bufs[i].buf_size,
- dma->bufs[i].freelist.low_mark,
- dma->bufs[i].freelist.high_mark );
- ++count;
- }
- }
- }
- request.count = count;
- if ( copy_to_user( (drm_buf_info_t *)arg,
- &request,
- sizeof(request) ) )
- return -EFAULT;
- return 0;
- }
- int DRM(markbufs)( 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 order;
- drm_buf_entry_t *entry;
- if ( !dma ) return -EINVAL;
- if ( copy_from_user( &request,
- (drm_buf_desc_t *)arg,
- sizeof(request) ) )
- return -EFAULT;
- DRM_DEBUG( "%d, %d, %dn",
- request.size, request.low_mark, request.high_mark );
- order = DRM(order)( request.size );
- if ( order < DRM_MIN_ORDER || order > DRM_MAX_ORDER ) return -EINVAL;
- entry = &dma->bufs[order];
- if ( request.low_mark < 0 || request.low_mark > entry->buf_count )
- return -EINVAL;
- if ( request.high_mark < 0 || request.high_mark > entry->buf_count )
- return -EINVAL;
- entry->freelist.low_mark = request.low_mark;
- entry->freelist.high_mark = request.high_mark;
- return 0;
- }
- int DRM(freebufs)( 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_free_t request;
- int i;
- int idx;
- drm_buf_t *buf;
- if ( !dma ) return -EINVAL;
- if ( copy_from_user( &request,
- (drm_buf_free_t *)arg,
- sizeof(request) ) )
- return -EFAULT;
- DRM_DEBUG( "%dn", request.count );
- for ( i = 0 ; i < request.count ; i++ ) {
- if ( copy_from_user( &idx,
- &request.list[i],
- sizeof(idx) ) )
- return -EFAULT;
- if ( idx < 0 || idx >= dma->buf_count ) {
- DRM_ERROR( "Index %d (of %d max)n",
- idx, dma->buf_count - 1 );
- return -EINVAL;
- }
- buf = dma->buflist[idx];
- if ( buf->pid != current->pid ) {
- DRM_ERROR( "Process %d freeing buffer owned by %dn",
- current->pid, buf->pid );
- return -EINVAL;
- }
- DRM(free_buffer)( dev, buf );
- }
- return 0;
- }
- int DRM(mapbufs)( 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;
- int retcode = 0;
- const int zero = 0;
- unsigned long virtual;
- unsigned long address;
- drm_buf_map_t request;
- int i;
- if ( !dma ) return -EINVAL;
- spin_lock( &dev->count_lock );
- if ( atomic_read( &dev->buf_alloc ) ) {
- spin_unlock( &dev->count_lock );
- return -EBUSY;
- }
- dev->buf_use++; /* Can't allocate more after this call */
- spin_unlock( &dev->count_lock );
- if ( copy_from_user( &request, (drm_buf_map_t *)arg,
- sizeof(request) ) )
- return -EFAULT;
- if ( request.count >= dma->buf_count ) {
- if ( (__HAVE_AGP && (dma->flags & _DRM_DMA_USE_AGP)) ||
- (__HAVE_SG && (dma->flags & _DRM_DMA_USE_SG)) ) {
- drm_map_t *map = DRIVER_AGP_BUFFERS_MAP( dev );
- if ( !map ) {
- retcode = -EINVAL;
- goto done;
- }
- #if LINUX_VERSION_CODE <= 0x020402
- down( ¤t->mm->mmap_sem );
- #else
- down_write( ¤t->mm->mmap_sem );
- #endif
- virtual = do_mmap( filp, 0, map->size,
- PROT_READ | PROT_WRITE,
- MAP_SHARED,
- (unsigned long)map->offset );
- #if LINUX_VERSION_CODE <= 0x020402
- up( ¤t->mm->mmap_sem );
- #else
- up_write( ¤t->mm->mmap_sem );
- #endif
- } else {
- #if LINUX_VERSION_CODE <= 0x020402
- down( ¤t->mm->mmap_sem );
- #else
- down_write( ¤t->mm->mmap_sem );
- #endif
- virtual = do_mmap( filp, 0, dma->byte_count,
- PROT_READ | PROT_WRITE,
- MAP_SHARED, 0 );
- #if LINUX_VERSION_CODE <= 0x020402
- up( ¤t->mm->mmap_sem );
- #else
- up_write( ¤t->mm->mmap_sem );
- #endif
- }
- if ( virtual > -1024UL ) {
- /* Real error */
- retcode = (signed long)virtual;
- goto done;
- }
- request.virtual = (void *)virtual;
- for ( i = 0 ; i < dma->buf_count ; i++ ) {
- if ( copy_to_user( &request.list[i].idx,
- &dma->buflist[i]->idx,
- sizeof(request.list[0].idx) ) ) {
- retcode = -EFAULT;
- goto done;
- }
- if ( copy_to_user( &request.list[i].total,
- &dma->buflist[i]->total,
- sizeof(request.list[0].total) ) ) {
- retcode = -EFAULT;
- goto done;
- }
- if ( copy_to_user( &request.list[i].used,
- &zero,
- sizeof(zero) ) ) {
- retcode = -EFAULT;
- goto done;
- }
- address = virtual + dma->buflist[i]->offset; /* *** */
- if ( copy_to_user( &request.list[i].address,
- &address,
- sizeof(address) ) ) {
- retcode = -EFAULT;
- goto done;
- }
- }
- }
- done:
- request.count = dma->buf_count;
- DRM_DEBUG( "%d buffers, retcode = %dn", request.count, retcode );
- if ( copy_to_user( (drm_buf_map_t *)arg, &request, sizeof(request) ) )
- return -EFAULT;
- return retcode;
- }
- #endif /* __HAVE_DMA */