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-rw-r--r--linux/drm_bufs.h757
1 files changed, 757 insertions, 0 deletions
diff --git a/linux/drm_bufs.h b/linux/drm_bufs.h
new file mode 100644
index 00000000..f2613a98
--- /dev/null
+++ b/linux/drm_bufs.h
@@ -0,0 +1,757 @@
+/* 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 "drmP.h"
+
+#ifndef __HAVE_PCI_DMA
+#define __HAVE_PCI_DMA 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;
+
+ 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;
+ }
+
+ 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 = 0;
+
+ switch ( map->type ) {
+ case _DRM_REGISTERS:
+ case _DRM_FRAME_BUFFER:
+#ifndef __sparc__
+ 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 CONFIG_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 = (void *)DRM(alloc_pages)( DRM(order)( map->size )
+ - PAGE_SHIFT,
+ DRM_MEM_SAREA );
+ DRM_DEBUG( "%ld %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 ) {
+ dev->lock.hw_lock = map->handle; /* Pointer to lock */
+ }
+ break;
+#if __REALLY_HAVE_AGP
+ case _DRM_AGP:
+ map->offset = map->offset + dev->agp->base;
+ break;
+#endif
+ default:
+ DRM(free)( map, sizeof(*map), DRM_MEM_MAPS );
+ return -EINVAL;
+ }
+
+ down( &dev->struct_sem );
+ if ( dev->maplist ) {
+ ++dev->map_count;
+ dev->maplist = DRM(realloc)( dev->maplist,
+ (dev->map_count-1)
+ * sizeof(*dev->maplist),
+ dev->map_count
+ * sizeof(*dev->maplist),
+ DRM_MEM_MAPS );
+ } else {
+ dev->map_count = 1;
+ dev->maplist = DRM(alloc)( dev->map_count*sizeof(*dev->maplist),
+ DRM_MEM_MAPS );
+ }
+ dev->maplist[dev->map_count-1] = map;
+ 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;
+}
+
+#if __HAVE_DMA
+
+#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;
+
+ 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: %d\n", count );
+ DRM_DEBUG( "order: %d\n", order );
+ DRM_DEBUG( "size: %d\n", size );
+ DRM_DEBUG( "agp_offset: %ld\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 */
+ }
+
+ 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 );
+ memset( buf->dev_private, 0, buf->dev_priv_size );
+
+#if DRM_DMA_HISTOGRAM
+ buf->time_queued = 0;
+ buf->time_dispatched = 0;
+ buf->time_completed = 0;
+ buf->time_freed = 0;
+#endif
+ 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 );
+
+ dma->buflist = DRM(realloc)( dma->buflist,
+ dma->buf_count * sizeof(*dma->buflist),
+ (dma->buf_count + entry->buf_count)
+ * sizeof(*dma->buflist),
+ DRM_MEM_BUFS );
+ 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 );
+
+/* GH: Please leave this disabled for now. I need to fix this properly...
+ */
+#if 0
+ /* FIXME: work this mess out...
+ */
+ 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;
+
+ 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=%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 */
+ }
+
+ 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) );
+
+ dma->pagelist = DRM(realloc)( dma->pagelist,
+ dma->page_count * sizeof(*dma->pagelist),
+ (dma->page_count + (count << page_order))
+ * sizeof(*dma->pagelist),
+ DRM_MEM_PAGES );
+ 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 ) break;
+ 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 );
+ 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 DRM_DMA_HISTOGRAM
+ buf->time_queued = 0;
+ buf->time_dispatched = 0;
+ buf->time_completed = 0;
+ buf->time_freed = 0;
+#endif
+ DRM_DEBUG( "buffer %d @ %p\n",
+ entry->buf_count, buf->address );
+ }
+ byte_count += PAGE_SIZE << page_order;
+ }
+
+ dma->buflist = DRM(realloc)( dma->buflist,
+ dma->buf_count * sizeof(*dma->buflist),
+ (dma->buf_count + entry->buf_count)
+ * sizeof(*dma->buflist),
+ DRM_MEM_BUFS );
+ 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);
+
+/* GH: Please leave this disabled for now. I need to fix this properly...
+ */
+#if 0
+ /* FIXME: work this mess out...
+ */
+ 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 */
+
+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_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 = %d\n", 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 %d\n",
+ 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, %d\n",
+ 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( "%d\n", 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 %d\n",
+ 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) ) {
+ drm_map_t *map = DRIVER_AGP_BUFFERS_MAP( dev );
+
+ if ( !map ) {
+ retcode = -EINVAL;
+ goto done;
+ }
+
+ down( &current->mm->mmap_sem );
+ virtual = do_mmap( filp, 0, map->size,
+ PROT_READ | PROT_WRITE,
+ MAP_SHARED,
+ (unsigned long)map->offset );
+ up( &current->mm->mmap_sem );
+ } else {
+ down( &current->mm->mmap_sem );
+ virtual = do_mmap( filp, 0, dma->byte_count,
+ PROT_READ | PROT_WRITE,
+ MAP_SHARED, 0 );
+ up( &current->mm->mmap_sem );
+ }
+ 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 = %d\n", request.count, retcode );
+
+ if ( copy_to_user( (drm_buf_map_t *)arg, &request, sizeof(request) ) )
+ return -EFAULT;
+
+ return retcode;
+}
+
+#endif /* __HAVE_DMA */
generated by cgit v1.2.3 (git 2.39.1) at 2024-12-05 02:17:06 +0000