diff options
Diffstat (limited to 'nx-X11/extras/drm/linux/drm_bufs.h')
| -rw-r--r-- | nx-X11/extras/drm/linux/drm_bufs.h | 1529 |
1 files changed, 0 insertions, 1529 deletions
diff --git a/nx-X11/extras/drm/linux/drm_bufs.h b/nx-X11/extras/drm/linux/drm_bufs.h deleted file mode 100644 index 03900d1b1..000000000 --- a/nx-X11/extras/drm/linux/drm_bufs.h +++ /dev/null @@ -1,1529 +0,0 @@ -/** - * \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]; - 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->bus_address = virt_to_bus(buf->address); - 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)( dev->dev_priv_size, - DRM_MEM_BUFS ); - if(!buf->dev_private) { - /* 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; - } - memset( buf->dev_private, 0, buf->dev_priv_size ); - - DRM_DEBUG( "buffer %d @ %p\n", - 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)(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; - } - dma->buflist = temp_buflist; - - for ( i = 0 ; i < entry->buf_count ; i++ ) { - dma->buflist[i + dma->buf_count] = &entry->buflist[i]; - } - - /* No allocations failed, so now we can replace the orginal pagelist - * with the new one. - */ - if (dma->page_count) { - DRM(free)(dma->pagelist, - dma->page_count * sizeof(*dma->pagelist), - DRM_MEM_PAGES); - } - dma->pagelist = temp_pagelist; - - 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); - - up( &dev->struct_sem ); - - request.count = entry->buf_count; - request.size = size; - - if ( copy_to_user( argp, &request, sizeof(request) ) ) - return -EFAULT; - - atomic_dec( &dev->buf_alloc ); - return 0; - -} - -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 __user *argp = (void __user *)arg; - 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 (!drm_core_check_feature(dev, DRIVER_SG)) 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; - - 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: %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 + dev->sg->handle); - 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)( dev->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_SG; - - atomic_dec( &dev->buf_alloc ); - return 0; -} - - -int DRM(addbufs_fb)( 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 (!drm_core_check_feature(dev, DRIVER_FB_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; - - 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: %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_FB; - - atomic_dec( &dev->buf_alloc ); - return 0; -} - - - -/** - * Add 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. - * - * According with the memory type specified in drm_buf_desc::flags and the - * build options, it dispatches the call either to addbufs_agp(), - * addbufs_sg() or addbufs_pci() for AGP, scatter-gather or consistent - * PCI memory respectively. - */ -int DRM(addbufs)( struct inode *inode, struct file *filp, - unsigned int cmd, unsigned long arg ) -{ - drm_buf_desc_t request; - drm_file_t *priv = filp->private_data; - drm_device_t *dev = priv->dev; - - if (!drm_core_check_feature(dev, DRIVER_HAVE_DMA)) - return -EINVAL; - - if ( copy_from_user( &request, (drm_buf_desc_t __user *)arg, - sizeof(request) ) ) - return -EFAULT; - -#if __OS_HAS_AGP - if ( request.flags & _DRM_AGP_BUFFER ) - return DRM(addbufs_agp)( inode, filp, cmd, arg ); - else -#endif - if ( request.flags & _DRM_SG_BUFFER ) - return DRM(addbufs_sg)( inode, filp, cmd, arg ); - else if ( request.flags & _DRM_FB_BUFFER ) - return DRM(addbufs_fb)( inode, filp, cmd, arg ); - else - return DRM(addbufs_pci)( inode, filp, cmd, arg ); -} - - -/** - * Get information about the buffer mappings. - * - * This was originally mean for debugging purposes, or by a sophisticated - * client library to determine how best to use the available buffers (e.g., - * large buffers can be used for image transfer). - * - * \param inode device inode. - * \param filp file pointer. - * \param cmd command. - * \param arg pointer to a drm_buf_info structure. - * \return zero on success or a negative number on failure. - * - * Increments drm_device::buf_use while holding the drm_device::count_lock - * lock, preventing of allocating more buffers after this call. Information - * about each requested buffer is then copied into user space. - */ -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; - drm_buf_info_t __user *argp = (void __user *)arg; - int i; - int count; - - if (!drm_core_check_feature(dev, DRIVER_HAVE_DMA)) - return -EINVAL; - - 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, argp, 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 __user *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( argp, &request, sizeof(request) ) ) - return -EFAULT; - - return 0; -} - -/** - * Specifies a low and high water mark for buffer allocation - * - * \param inode device inode. - * \param filp file pointer. - * \param cmd command. - * \param arg a pointer to a drm_buf_desc structure. - * \return zero on success or a negative number on failure. - * - * Verifies that the size order is bounded between the admissible orders and - * updates the respective drm_device_dma::bufs entry low and high water mark. - * - * \note This ioctl is deprecated and mostly never used. - */ -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 (!drm_core_check_feature(dev, DRIVER_HAVE_DMA)) - return -EINVAL; - - if ( !dma ) return -EINVAL; - - if ( copy_from_user( &request, - (drm_buf_desc_t __user *)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; -} - -/** - * Unreserve the buffers in list, previously reserved using drmDMA. - * - * \param inode device inode. - * \param filp file pointer. - * \param cmd command. - * \param arg pointer to a drm_buf_free structure. - * \return zero on success or a negative number on failure. - * - * Calls free_buffer() for each used buffer. - * This function is primarily used for debugging. - */ -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 (!drm_core_check_feature(dev, DRIVER_HAVE_DMA)) - return -EINVAL; - - if ( !dma ) return -EINVAL; - - if ( copy_from_user( &request, - (drm_buf_free_t __user *)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->filp != filp ) { - DRM_ERROR( "Process %d freeing buffer not owned\n", - current->pid ); - return -EINVAL; - } - DRM(free_buffer)( dev, buf ); - } - - return 0; -} - -/** - * Maps all of the DMA buffers into client-virtual space (ioctl). - * - * \param inode device inode. - * \param filp file pointer. - * \param cmd command. - * \param arg pointer to a drm_buf_map structure. - * \return zero on success or a negative number on failure. - * - * Maps the AGP or SG buffer region with do_mmap(), and copies information - * about each buffer into user space. The PCI buffers are already mapped on the - * addbufs_pci() call. - */ -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; - drm_buf_map_t __user *argp = (void __user *)arg; - int retcode = 0; - const int zero = 0; - unsigned long virtual; - unsigned long address; - drm_buf_map_t request; - int i; - - if (!drm_core_check_feature(dev, DRIVER_HAVE_DMA)) - return -EINVAL; - - 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, argp, sizeof(request) ) ) - return -EFAULT; - - if ( request.count >= dma->buf_count ) { - if ((drm_core_has_AGP(dev) && (dma->flags & _DRM_DMA_USE_AGP)) || - (drm_core_check_feature(dev, DRIVER_SG) && (dma->flags & _DRM_DMA_USE_SG)) || - (drm_core_check_feature(dev, DRIVER_FB_DMA) && (dma->flags & _DRM_DMA_USE_FB))) { - drm_map_t *map = dev->agp_buffer_map; - - 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 __user *)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( argp, &request, sizeof(request) ) ) - return -EFAULT; - - return retcode; -} - |