/**
- * \file drm_bufs.h
+ * \file drm_bufs.c
* Generic buffer template
- *
+ *
* \author Rickard E. (Rik) Faith <faith@valinux.com>
* \author Gareth Hughes <gareth@valinux.com>
*/
#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 )
+unsigned long drm_get_resource_start(drm_device_t *dev, unsigned int resource)
{
- int order;
- unsigned long tmp;
+ return pci_resource_start(dev->pdev, resource);
+}
+EXPORT_SYMBOL(drm_get_resource_start);
- for (order = 0, tmp = size >> 1; tmp; tmp >>= 1, order++)
- ;
+unsigned long drm_get_resource_len(drm_device_t *dev, unsigned int resource)
+{
+ return pci_resource_len(dev->pdev, resource);
+}
- if (size & (size - 1))
- ++order;
+EXPORT_SYMBOL(drm_get_resource_len);
- return order;
+static drm_map_list_t *drm_find_matching_map(drm_device_t *dev,
+ drm_local_map_t *map)
+{
+ struct list_head *list;
+
+ list_for_each(list, &dev->maplist->head) {
+ drm_map_list_t *entry = list_entry(list, drm_map_list_t, head);
+ if (entry->map && map->type == entry->map->type &&
+ entry->map->offset == map->offset) {
+ return entry;
+ }
+ }
+
+ return NULL;
}
-EXPORT_SYMBOL(drm_order);
+
+/*
+ * Used to allocate 32-bit handles for mappings.
+ */
+#define START_RANGE 0x10000000
+#define END_RANGE 0x40000000
+
+#ifdef _LP64
+static __inline__ unsigned int HandleID(unsigned long lhandle,
+ drm_device_t *dev)
+{
+ static unsigned int map32_handle = START_RANGE;
+ unsigned int hash;
+
+ if (lhandle & 0xffffffff00000000) {
+ hash = map32_handle;
+ map32_handle += PAGE_SIZE;
+ if (map32_handle > END_RANGE)
+ map32_handle = START_RANGE;
+ } else
+ hash = lhandle;
+
+ while (1) {
+ drm_map_list_t *_entry;
+ list_for_each_entry(_entry, &dev->maplist->head, head) {
+ if (_entry->user_token == hash)
+ break;
+ }
+ if (&_entry->head == &dev->maplist->head)
+ return hash;
+
+ hash += PAGE_SIZE;
+ map32_handle += PAGE_SIZE;
+ }
+}
+#else
+# define HandleID(x,dev) (unsigned int)(x)
+#endif
/**
* Ioctl to specify a range of memory that is available for mapping by a non-root process.
* 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 )
+static int drm_addmap_core(drm_device_t * dev, unsigned int offset,
+ unsigned int size, drm_map_type_t type,
+ drm_map_flags_t flags, drm_map_list_t ** maplist)
{
- drm_file_t *priv = filp->private_data;
- drm_device_t *dev = priv->head->dev;
drm_map_t *map;
- drm_map_t __user *argp = (void __user *)arg;
drm_map_list_t *list;
+ drm_dma_handle_t *dmah;
- if ( !(filp->f_mode & 3) ) return -EACCES; /* Require read/write */
-
- map = drm_alloc( sizeof(*map), DRM_MEM_MAPS );
- if ( !map )
+ 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;
- }
+ map->offset = offset;
+ map->size = size;
+ map->flags = flags;
+ map->type = type;
/* 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 );
+ 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 );
+ 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->mtrr = -1;
map->handle = NULL;
- switch ( map->type ) {
+ switch (map->type) {
case _DRM_REGISTERS:
case _DRM_FRAME_BUFFER:
-#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 );
+#if !defined(__sparc__) && !defined(__alpha__) && !defined(__ia64__) && !defined(__powerpc64__) && !defined(__x86_64__)
+ if (map->offset + (map->size-1) < 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
+ /* Some drivers preinitialize some maps, without the X Server
+ * needing to be aware of it. Therefore, we just return success
+ * when the server tries to create a duplicate map.
+ */
+ list = drm_find_matching_map(dev, map);
+ if (list != NULL) {
+ if (list->map->size != map->size) {
+ DRM_DEBUG("Matching maps of type %d with "
+ "mismatched sizes, (%ld vs %ld)\n",
+ map->type, map->size,
+ list->map->size);
+ list->map->size = map->size;
+ }
+
+ drm_free(map, sizeof(*map), DRM_MEM_MAPS);
+ *maplist = list;
+ return 0;
+ }
+
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_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 );
+ 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 );
+ 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 ) {
+ 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 );
+ 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 */
+ dev->sigdata.lock = dev->lock.hw_lock = map->handle; /* Pointer to lock */
}
break;
case _DRM_AGP:
map->offset += dev->hose->mem_space->start;
#endif
map->offset += dev->agp->base;
- map->mtrr = dev->agp->agp_mtrr; /* for getmap */
+ map->mtrr = dev->agp->agp_mtrr; /* for getmap */
}
break;
case _DRM_SCATTER_GATHER:
drm_free(map, sizeof(*map), DRM_MEM_MAPS);
return -EINVAL;
}
- map->offset += dev->sg->handle;
+ map->offset += (unsigned long)dev->sg->virtual;
+ break;
+ case _DRM_CONSISTENT:
+ /* dma_addr_t is 64bit on i386 with CONFIG_HIGHMEM64G,
+ * As we're limiting the address to 2^32-1 (or less),
+ * casting it down to 32 bits is no problem, but we
+ * need to point to a 64bit variable first. */
+ dmah = drm_pci_alloc(dev, map->size, map->size, 0xffffffffUL);
+ if (!dmah) {
+ drm_free(map, sizeof(*map), DRM_MEM_MAPS);
+ return -ENOMEM;
+ }
+ map->handle = dmah->vaddr;
+ map->offset = (unsigned long)dmah->busaddr;
+ kfree(dmah);
break;
-
default:
- drm_free( map, sizeof(*map), DRM_MEM_MAPS );
+ drm_free(map, sizeof(*map), DRM_MEM_MAPS);
return -EINVAL;
}
list = drm_alloc(sizeof(*list), DRM_MEM_MAPS);
- if(!list) {
+ if (!list) {
drm_free(map, sizeof(*map), DRM_MEM_MAPS);
return -EINVAL;
}
memset(list, 0, sizeof(*list));
list->map = map;
- down(&dev->struct_sem);
+ mutex_lock(&dev->struct_mutex);
list_add(&list->head, &dev->maplist->head);
- up(&dev->struct_sem);
+ /* Assign a 32-bit handle */
+ /* We do it here so that dev->struct_mutex protects the increment */
+ list->user_token = HandleID(map->type == _DRM_SHM
+ ? (unsigned long)map->handle
+ : map->offset, dev);
+ mutex_unlock(&dev->struct_mutex);
+
+ *maplist = list;
+ return 0;
+}
+
+int drm_addmap(drm_device_t * dev, unsigned int offset,
+ unsigned int size, drm_map_type_t type,
+ drm_map_flags_t flags, drm_local_map_t ** map_ptr)
+{
+ drm_map_list_t *list;
+ int rc;
+
+ rc = drm_addmap_core(dev, offset, size, type, flags, &list);
+ if (!rc)
+ *map_ptr = list->map;
+ return rc;
+}
+
+EXPORT_SYMBOL(drm_addmap);
+
+int drm_addmap_ioctl(struct inode *inode, struct file *filp,
+ unsigned int cmd, unsigned long arg)
+{
+ drm_file_t *priv = filp->private_data;
+ drm_device_t *dev = priv->head->dev;
+ drm_map_t map;
+ drm_map_list_t *maplist;
+ drm_map_t __user *argp = (void __user *)arg;
+ int err;
- if ( copy_to_user( argp, map, sizeof(*map) ) )
+ if (!(filp->f_mode & 3))
+ return -EACCES; /* Require read/write */
+
+ if (copy_from_user(&map, argp, sizeof(map))) {
return -EFAULT;
- if ( map->type != _DRM_SHM ) {
- if ( copy_to_user( &argp->handle,
- &map->offset,
- sizeof(map->offset) ) )
- return -EFAULT;
}
+
+ if (!(capable(CAP_SYS_ADMIN) || map.type == _DRM_AGP))
+ return -EPERM;
+
+ err = drm_addmap_core(dev, map.offset, map.size, map.type, map.flags,
+ &maplist);
+
+ if (err)
+ return err;
+
+ if (copy_to_user(argp, maplist->map, sizeof(drm_map_t)))
+ return -EFAULT;
+
+ /* avoid a warning on 64-bit, this casting isn't very nice, but the API is set so too late */
+ if (put_user((void *)(unsigned long)maplist->user_token, &argp->handle))
+ return -EFAULT;
return 0;
}
-
/**
* Remove a map private from list and deallocate resources if the mapping
* isn't in use.
* its being used, and free any associate resource (such as MTRR's) if it's not
* being on use.
*
- * \sa addmap().
+ * \sa drm_addmap
*/
-int drm_rmmap(struct inode *inode, struct file *filp,
- unsigned int cmd, unsigned long arg)
+int drm_rmmap_locked(drm_device_t *dev, drm_local_map_t *map)
{
- drm_file_t *priv = filp->private_data;
- drm_device_t *dev = priv->head->dev;
struct list_head *list;
drm_map_list_t *r_list = NULL;
- drm_vma_entry_t *pt, *prev;
- drm_map_t *map;
+ drm_dma_handle_t dmah;
+
+ /* Find the list entry for the map and remove it */
+ list_for_each(list, &dev->maplist->head) {
+ r_list = list_entry(list, drm_map_list_t, head);
+
+ if (r_list->map == map) {
+ list_del(list);
+ drm_free(list, sizeof(*list), DRM_MEM_MAPS);
+ break;
+ }
+ }
+
+ /* List has wrapped around to the head pointer, or it's empty and we
+ * didn't find anything.
+ */
+ if (list == (&dev->maplist->head)) {
+ return -EINVAL;
+ }
+
+ switch (map->type) {
+ case _DRM_REGISTERS:
+ drm_ioremapfree(map->handle, map->size, dev);
+ /* FALLTHROUGH */
+ case _DRM_FRAME_BUFFER:
+ if (drm_core_has_MTRR(dev) && map->mtrr >= 0) {
+ int retcode;
+ retcode = mtrr_del(map->mtrr, map->offset, map->size);
+ DRM_DEBUG("mtrr_del=%d\n", retcode);
+ }
+ break;
+ case _DRM_SHM:
+ vfree(map->handle);
+ break;
+ case _DRM_AGP:
+ case _DRM_SCATTER_GATHER:
+ break;
+ case _DRM_CONSISTENT:
+ dmah.vaddr = map->handle;
+ dmah.busaddr = map->offset;
+ dmah.size = map->size;
+ __drm_pci_free(dev, &dmah);
+ break;
+ }
+ drm_free(map, sizeof(*map), DRM_MEM_MAPS);
+
+ return 0;
+}
+
+int drm_rmmap(drm_device_t *dev, drm_local_map_t *map)
+{
+ int ret;
+
+ mutex_lock(&dev->struct_mutex);
+ ret = drm_rmmap_locked(dev, map);
+ mutex_unlock(&dev->struct_mutex);
+
+ return ret;
+}
+
+/* The rmmap ioctl appears to be unnecessary. All mappings are torn down on
+ * the last close of the device, and this is necessary for cleanup when things
+ * exit uncleanly. Therefore, having userland manually remove mappings seems
+ * like a pointless exercise since they're going away anyway.
+ *
+ * One use case might be after addmap is allowed for normal users for SHM and
+ * gets used by drivers that the server doesn't need to care about. This seems
+ * unlikely.
+ */
+int drm_rmmap_ioctl(struct inode *inode, struct file *filp,
+ unsigned int cmd, unsigned long arg)
+{
+ drm_file_t *priv = filp->private_data;
+ drm_device_t *dev = priv->head->dev;
drm_map_t request;
- int found_maps = 0;
+ drm_local_map_t *map = NULL;
+ struct list_head *list;
+ int ret;
- if (copy_from_user(&request, (drm_map_t __user *)arg,
- sizeof(request))) {
+ if (copy_from_user(&request, (drm_map_t __user *) arg, sizeof(request))) {
return -EFAULT;
}
- down(&dev->struct_sem);
- list = &dev->maplist->head;
+ mutex_lock(&dev->struct_mutex);
list_for_each(list, &dev->maplist->head) {
- r_list = list_entry(list, drm_map_list_t, head);
+ drm_map_list_t *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;
+ if (r_list->map &&
+ r_list->user_token == (unsigned long)request.handle &&
+ r_list->map->flags & _DRM_REMOVABLE) {
+ map = r_list->map;
+ 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);
+ if (list == (&dev->maplist->head)) {
+ mutex_unlock(&dev->struct_mutex);
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 (pt->vma->vm_private_data == map) found_maps++;
- }
+ if (!map)
+ return -EINVAL;
- if(!found_maps) {
- switch (map->type) {
- case _DRM_REGISTERS:
- case _DRM_FRAME_BUFFER:
- if (drm_core_has_MTRR(dev)) {
- if (map->mtrr >= 0) {
- int retcode;
- retcode = mtrr_del(map->mtrr,
- map->offset,
- map->size);
- DRM_DEBUG("mtrr_del = %d\n", retcode);
- }
- }
- drm_ioremapfree(map->handle, map->size, dev);
- break;
- case _DRM_SHM:
- vfree(map->handle);
- break;
- case _DRM_AGP:
- case _DRM_SCATTER_GATHER:
- break;
- }
- drm_free(map, sizeof(*map), DRM_MEM_MAPS);
+ /* Register and framebuffer maps are permanent */
+ if ((map->type == _DRM_REGISTERS) || (map->type == _DRM_FRAME_BUFFER)) {
+ mutex_unlock(&dev->struct_mutex);
+ return 0;
}
- up(&dev->struct_sem);
- return 0;
+
+ ret = drm_rmmap_locked(dev, map);
+
+ mutex_unlock(&dev->struct_mutex);
+
+ return ret;
}
/**
* 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)
+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_pci_free(dev, entry->seglist[i]);
}
}
drm_free(entry->seglist,
- entry->seg_count *
- sizeof(*entry->seglist),
- DRM_MEM_SEGS);
+ 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->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);
+ 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 *
+ sizeof(*entry->buflist), DRM_MEM_BUFS);
entry->buf_count = 0;
}
#if __OS_HAS_AGP
/**
- * Add AGP buffers for DMA transfers (ioctl).
+ * Add AGP buffers for DMA transfers.
*
- * \param inode device inode.
- * \param filp file pointer.
- * \param cmd command.
- * \param arg pointer to a drm_buf_desc_t request.
+ * \param dev drm_device_t to which the buffers are to be added.
+ * \param request pointer to a drm_buf_desc_t describing the 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 )
+int drm_addbufs_agp(drm_device_t * dev, drm_buf_desc_t * request)
{
- drm_file_t *priv = filp->private_data;
- drm_device_t *dev = priv->head->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;
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;
+ if (!dma)
+ return -EINVAL;
- count = request.count;
- order = drm_order( request.size );
+ count = request->count;
+ order = drm_order(request->size);
size = 1 << order;
- alignment = (request.flags & _DRM_PAGE_ALIGN)
- ? PAGE_ALIGN(size) : size;
+ 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 );
+ 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: %lx\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 );
+ atomic_inc(&dev->buf_alloc);
+ spin_unlock(&dev->count_lock);
- down( &dev->struct_sem );
+ mutex_lock(&dev->struct_mutex);
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 (entry->buf_count) {
+ mutex_unlock(&dev->struct_mutex);
+ 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 );
+ mutex_unlock(&dev->struct_mutex);
+ 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 );
+ entry->buflist = drm_alloc(count * sizeof(*entry->buflist),
+ DRM_MEM_BUFS);
+ if (!entry->buflist) {
+ mutex_unlock(&dev->struct_mutex);
+ atomic_dec(&dev->buf_alloc);
return -ENOMEM;
}
- memset( entry->buflist, 0, count * sizeof(*entry->buflist) );
+ 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;
+ 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->offset = (dma->byte_count + offset);
buf->bus_address = agp_offset + offset;
buf->address = (void *)(agp_offset + offset);
- buf->next = NULL;
+ buf->next = NULL;
buf->waiting = 0;
buf->pending = 0;
- init_waitqueue_head( &buf->dma_wait );
- buf->filp = NULL;
+ init_waitqueue_head(&buf->dma_wait);
+ buf->filp = NULL;
buf->dev_priv_size = dev->driver->dev_priv_size;
- buf->dev_private = drm_alloc( buf->dev_priv_size,
- DRM_MEM_BUFS );
- if(!buf->dev_private) {
+ 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 );
+ drm_cleanup_buf_error(dev, entry);
+ mutex_unlock(&dev->struct_mutex);
+ atomic_dec(&dev->buf_alloc);
return -ENOMEM;
}
- memset( buf->dev_private, 0, buf->dev_priv_size );
+ memset(buf->dev_private, 0, buf->dev_priv_size);
- DRM_DEBUG( "buffer %d @ %p\n",
- entry->buf_count, buf->address );
+ 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 );
+ 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) {
+ 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 );
+ drm_cleanup_buf_error(dev, entry);
+ mutex_unlock(&dev->struct_mutex);
+ atomic_dec(&dev->buf_alloc);
return -ENOMEM;
}
dma->buflist = temp_buflist;
- for ( i = 0 ; i < entry->buf_count ; i++ ) {
+ 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 += byte_count >> PAGE_SHIFT;
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 );
+ DRM_DEBUG("dma->buf_count : %d\n", dma->buf_count);
+ DRM_DEBUG("entry->buf_count : %d\n", entry->buf_count);
- up( &dev->struct_sem );
+ mutex_unlock(&dev->struct_mutex);
- request.count = entry->buf_count;
- request.size = size;
-
- if ( copy_to_user( argp, &request, sizeof(request) ) )
- return -EFAULT;
+ request->count = entry->buf_count;
+ request->size = size;
dma->flags = _DRM_DMA_USE_AGP;
- atomic_dec( &dev->buf_alloc );
+ atomic_dec(&dev->buf_alloc);
return 0;
}
-#endif /* __OS_HAS_AGP */
+EXPORT_SYMBOL(drm_addbufs_agp);
+#endif /* __OS_HAS_AGP */
-int drm_addbufs_pci( struct inode *inode, struct file *filp,
- unsigned int cmd, unsigned long arg )
+int drm_addbufs_pci(drm_device_t * dev, drm_buf_desc_t * request)
{
- drm_file_t *priv = filp->private_data;
- drm_device_t *dev = priv->head->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_dma_handle_t *dmah;
drm_buf_t *buf;
int alignment;
unsigned long offset;
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 (!drm_core_check_feature(dev, DRIVER_PCI_DMA))
+ return -EINVAL;
- if ( copy_from_user( &request, argp, sizeof(request) ) )
- return -EFAULT;
+ if (!dma)
+ return -EINVAL;
+
+ if (!capable(CAP_SYS_ADMIN))
+ return -EPERM;
- count = request.count;
- order = drm_order( request.size );
+ 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 );
+ 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 */
+ 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;
+ 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 );
+ 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 );
+ atomic_inc(&dev->buf_alloc);
+ spin_unlock(&dev->count_lock);
- down( &dev->struct_sem );
+ mutex_lock(&dev->struct_mutex);
entry = &dma->bufs[order];
- if ( entry->buf_count ) {
- up( &dev->struct_sem );
- atomic_dec( &dev->buf_alloc );
+ if (entry->buf_count) {
+ mutex_unlock(&dev->struct_mutex);
+ 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 );
+ mutex_unlock(&dev->struct_mutex);
+ 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 );
+ entry->buflist = drm_alloc(count * sizeof(*entry->buflist),
+ DRM_MEM_BUFS);
+ if (!entry->buflist) {
+ mutex_unlock(&dev->struct_mutex);
+ 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 );
+ 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);
+ mutex_unlock(&dev->struct_mutex);
+ atomic_dec(&dev->buf_alloc);
return -ENOMEM;
}
- memset( entry->seglist, 0, count * sizeof(*entry->seglist) );
+ 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 );
+ 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 );
+ drm_free(entry->buflist,
+ count * sizeof(*entry->buflist), DRM_MEM_BUFS);
+ drm_free(entry->seglist,
+ count * sizeof(*entry->seglist), DRM_MEM_SEGS);
+ mutex_unlock(&dev->struct_mutex);
+ 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) );
+ 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->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 ) {
+ while (entry->buf_count < count) {
+
+ dmah = drm_pci_alloc(dev, PAGE_SIZE << page_order, 0x1000, 0xfffffffful);
+
+ if (!dmah) {
/* 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 );
+ drm_free(temp_pagelist,
+ (dma->page_count + (count << page_order))
+ * sizeof(*dma->pagelist), DRM_MEM_PAGES);
+ mutex_unlock(&dev->struct_mutex);
+ 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 );
+ entry->seglist[entry->seg_count++] = dmah;
+ for (i = 0; i < (1 << page_order); i++) {
+ DRM_DEBUG("page %d @ 0x%08lx\n",
+ dma->page_count + page_count,
+ (unsigned long)dmah->vaddr + PAGE_SIZE * i);
temp_pagelist[dma->page_count + page_count++]
- = page + PAGE_SIZE * i;
+ = (unsigned long)dmah->vaddr + 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;
+ 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 *)(dmah->vaddr + offset);
+ buf->bus_address = dmah->busaddr + offset;
+ buf->next = NULL;
buf->waiting = 0;
buf->pending = 0;
- init_waitqueue_head( &buf->dma_wait );
- buf->filp = NULL;
+ init_waitqueue_head(&buf->dma_wait);
+ buf->filp = NULL;
buf->dev_priv_size = dev->driver->dev_priv_size;
- buf->dev_private = drm_alloc( buf->dev_priv_size,
- DRM_MEM_BUFS );
- if(!buf->dev_private) {
+ 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;
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 );
+ drm_cleanup_buf_error(dev, entry);
+ drm_free(temp_pagelist,
+ (dma->page_count +
+ (count << page_order))
+ * sizeof(*dma->pagelist),
+ DRM_MEM_PAGES);
+ mutex_unlock(&dev->struct_mutex);
+ atomic_dec(&dev->buf_alloc);
return -ENOMEM;
}
- memset( buf->dev_private, 0, buf->dev_priv_size );
+ memset(buf->dev_private, 0, buf->dev_priv_size);
- DRM_DEBUG( "buffer %d @ %p\n",
- entry->buf_count, buf->address );
+ 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 );
+ 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 );
+ drm_cleanup_buf_error(dev, entry);
+ drm_free(temp_pagelist,
+ (dma->page_count + (count << page_order))
+ * sizeof(*dma->pagelist), DRM_MEM_PAGES);
+ mutex_unlock(&dev->struct_mutex);
+ atomic_dec(&dev->buf_alloc);
return -ENOMEM;
}
dma->buflist = temp_buflist;
- for ( i = 0 ; i < entry->buf_count ; i++ ) {
+ for (i = 0; i < entry->buf_count; i++) {
dma->buflist[i + dma->buf_count] = &entry->buflist[i];
}
*/
if (dma->page_count) {
drm_free(dma->pagelist,
- dma->page_count * sizeof(*dma->pagelist),
- DRM_MEM_PAGES);
+ dma->page_count * sizeof(*dma->pagelist),
+ DRM_MEM_PAGES);
}
dma->pagelist = temp_pagelist;
dma->page_count += entry->seg_count << page_order;
dma->byte_count += PAGE_SIZE * (entry->seg_count << page_order);
- up( &dev->struct_sem );
+ mutex_unlock(&dev->struct_mutex);
- request.count = entry->buf_count;
- request.size = size;
-
- if ( copy_to_user( argp, &request, sizeof(request) ) )
- return -EFAULT;
+ request->count = entry->buf_count;
+ request->size = size;
- atomic_dec( &dev->buf_alloc );
+ atomic_dec(&dev->buf_alloc);
return 0;
}
+EXPORT_SYMBOL(drm_addbufs_pci);
-int drm_addbufs_sg( struct inode *inode, struct file *filp,
- unsigned int cmd, unsigned long arg )
+static int drm_addbufs_sg(drm_device_t * dev, drm_buf_desc_t * request)
{
- drm_file_t *priv = filp->private_data;
- drm_device_t *dev = priv->head->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;
int i;
drm_buf_t **temp_buflist;
- if (!drm_core_check_feature(dev, DRIVER_SG)) return -EINVAL;
-
- if ( !dma ) return -EINVAL;
+ if (!drm_core_check_feature(dev, DRIVER_SG))
+ return -EINVAL;
- if ( copy_from_user( &request, argp, sizeof(request) ) )
- return -EFAULT;
+ if (!dma)
+ return -EINVAL;
+
+ if (!capable(CAP_SYS_ADMIN))
+ return -EPERM;
- count = request.count;
- order = drm_order( request.size );
+ count = request->count;
+ order = drm_order(request->size);
size = 1 << order;
- alignment = (request.flags & _DRM_PAGE_ALIGN)
- ? PAGE_ALIGN(size) : size;
+ 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 );
+ 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 );
+ atomic_inc(&dev->buf_alloc);
+ spin_unlock(&dev->count_lock);
- down( &dev->struct_sem );
+ mutex_lock(&dev->struct_mutex);
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 (entry->buf_count) {
+ mutex_unlock(&dev->struct_mutex);
+ 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 );
+ mutex_unlock(&dev->struct_mutex);
+ 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 );
+ entry->buflist = drm_alloc(count * sizeof(*entry->buflist),
+ DRM_MEM_BUFS);
+ if (!entry->buflist) {
+ mutex_unlock(&dev->struct_mutex);
+ atomic_dec(&dev->buf_alloc);
return -ENOMEM;
}
- memset( entry->buflist, 0, count * sizeof(*entry->buflist) );
+ 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;
+ 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->offset = (dma->byte_count + offset);
buf->bus_address = agp_offset + offset;
- buf->address = (void *)(agp_offset + offset + dev->sg->handle);
- buf->next = NULL;
+ buf->address = (void *)(agp_offset + offset
+ + (unsigned long)dev->sg->virtual);
+ buf->next = NULL;
buf->waiting = 0;
buf->pending = 0;
- init_waitqueue_head( &buf->dma_wait );
- buf->filp = NULL;
+ init_waitqueue_head(&buf->dma_wait);
+ buf->filp = NULL;
buf->dev_priv_size = dev->driver->dev_priv_size;
- buf->dev_private = drm_alloc( buf->dev_priv_size,
- DRM_MEM_BUFS );
- if(!buf->dev_private) {
+ 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 );
+ drm_cleanup_buf_error(dev, entry);
+ mutex_unlock(&dev->struct_mutex);
+ atomic_dec(&dev->buf_alloc);
return -ENOMEM;
}
- memset( buf->dev_private, 0, buf->dev_priv_size );
+ memset(buf->dev_private, 0, buf->dev_priv_size);
- DRM_DEBUG( "buffer %d @ %p\n",
- entry->buf_count, buf->address );
+ 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 );
+ 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) {
+ 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 );
+ drm_cleanup_buf_error(dev, entry);
+ mutex_unlock(&dev->struct_mutex);
+ atomic_dec(&dev->buf_alloc);
return -ENOMEM;
}
dma->buflist = temp_buflist;
- for ( i = 0 ; i < entry->buf_count ; i++ ) {
+ 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 += byte_count >> PAGE_SHIFT;
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 );
+ DRM_DEBUG("dma->buf_count : %d\n", dma->buf_count);
+ DRM_DEBUG("entry->buf_count : %d\n", entry->buf_count);
- up( &dev->struct_sem );
+ mutex_unlock(&dev->struct_mutex);
- request.count = entry->buf_count;
- request.size = size;
-
- if ( copy_to_user( argp, &request, sizeof(request) ) )
- return -EFAULT;
+ request->count = entry->buf_count;
+ request->size = size;
dma->flags = _DRM_DMA_USE_SG;
- atomic_dec( &dev->buf_alloc );
+ atomic_dec(&dev->buf_alloc);
return 0;
}
+static int drm_addbufs_fb(drm_device_t * dev, drm_buf_desc_t * request)
+{
+ drm_device_dma_t *dma = dev->dma;
+ 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_FB_DMA))
+ return -EINVAL;
+
+ if (!dma)
+ return -EINVAL;
+
+ if (!capable(CAP_SYS_ADMIN))
+ return -EPERM;
+
+ 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);
+
+ mutex_lock(&dev->struct_mutex);
+ entry = &dma->bufs[order];
+ if (entry->buf_count) {
+ mutex_unlock(&dev->struct_mutex);
+ atomic_dec(&dev->buf_alloc);
+ return -ENOMEM; /* May only call once for each order */
+ }
+
+ if (count < 0 || count > 4096) {
+ mutex_unlock(&dev->struct_mutex);
+ atomic_dec(&dev->buf_alloc);
+ return -EINVAL;
+ }
+
+ entry->buflist = drm_alloc(count * sizeof(*entry->buflist),
+ DRM_MEM_BUFS);
+ if (!entry->buflist) {
+ mutex_unlock(&dev->struct_mutex);
+ 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->driver->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);
+ mutex_unlock(&dev->struct_mutex);
+ 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);
+ mutex_unlock(&dev->struct_mutex);
+ 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 += byte_count >> PAGE_SHIFT;
+ 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);
+
+ mutex_unlock(&dev->struct_mutex);
+
+ request->count = entry->buf_count;
+ request->size = size;
+
+ dma->flags = _DRM_DMA_USE_FB;
+
+ atomic_dec(&dev->buf_alloc);
+ return 0;
+}
+
+
/**
* Add buffers for DMA transfers (ioctl).
*
* 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 )
+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->head->dev;
-
+ int ret;
+
if (!drm_core_check_feature(dev, DRIVER_HAVE_DMA))
return -EINVAL;
- if ( copy_from_user( &request, (drm_buf_desc_t __user *)arg,
- sizeof(request) ) )
+ 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 );
+ if (request.flags & _DRM_AGP_BUFFER)
+ ret = drm_addbufs_agp(dev, &request);
else
#endif
- if ( request.flags & _DRM_SG_BUFFER )
- return drm_addbufs_sg( inode, filp, cmd, arg );
+ if (request.flags & _DRM_SG_BUFFER)
+ ret = drm_addbufs_sg(dev, &request);
+ else if (request.flags & _DRM_FB_BUFFER)
+ ret = drm_addbufs_fb(dev, &request);
else
- return drm_addbufs_pci( inode, filp, cmd, arg );
-}
+ ret = drm_addbufs_pci(dev, &request);
+ if (ret == 0) {
+ if (copy_to_user((void __user *)arg, &request, sizeof(request))) {
+ ret = -EFAULT;
+ }
+ }
+ return ret;
+}
/**
* Get information about the buffer mappings.
* 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 )
+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->head->dev;
if (!drm_core_check_feature(dev, DRIVER_HAVE_DMA))
return -EINVAL;
- if ( !dma ) return -EINVAL;
+ if (!dma)
+ return -EINVAL;
- spin_lock( &dev->count_lock );
- if ( atomic_read( &dev->buf_alloc ) ) {
- spin_unlock( &dev->count_lock );
+ 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 );
+ spin_unlock(&dev->count_lock);
- if ( copy_from_user( &request, argp, sizeof(request) ) )
+ 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;
+ for (i = 0, count = 0; i < DRM_MAX_ORDER + 1; i++) {
+ if (dma->bufs[i].buf_count)
+ ++count;
}
- DRM_DEBUG( "count = %d\n", 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];
+ 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) ) )
+ 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 );
+ 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) ) )
+ if (copy_to_user(argp, &request, sizeof(request)))
return -EFAULT;
return 0;
*
* \note This ioctl is deprecated and mostly never used.
*/
-int drm_markbufs( struct inode *inode, struct file *filp,
- unsigned int cmd, unsigned long arg )
+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->head->dev;
if (!drm_core_check_feature(dev, DRIVER_HAVE_DMA))
return -EINVAL;
- if ( !dma ) return -EINVAL;
+ if (!dma)
+ return -EINVAL;
- if ( copy_from_user( &request,
- (drm_buf_desc_t __user *)arg,
- sizeof(request) ) )
+ 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;
+ 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 )
+ if (request.low_mark < 0 || request.low_mark > entry->buf_count)
return -EINVAL;
- if ( request.high_mark < 0 || request.high_mark > entry->buf_count )
+ if (request.high_mark < 0 || request.high_mark > entry->buf_count)
return -EINVAL;
- entry->freelist.low_mark = request.low_mark;
+ 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.
+ * 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 )
+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->head->dev;
if (!drm_core_check_feature(dev, DRIVER_HAVE_DMA))
return -EINVAL;
- if ( !dma ) return -EINVAL;
+ if (!dma)
+ return -EINVAL;
- if ( copy_from_user( &request,
- (drm_buf_free_t __user *)arg,
- sizeof(request) ) )
+ 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) ) )
+ 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 );
+ 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 );
+ if (buf->filp != filp) {
+ DRM_ERROR("Process %d freeing buffer not owned\n",
+ current->pid);
return -EINVAL;
}
- drm_free_buffer( dev, buf );
+ drm_free_buffer(dev, buf);
}
return 0;
* 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 )
+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->head->dev;
if (!drm_core_check_feature(dev, DRIVER_HAVE_DMA))
return -EINVAL;
- if ( !dma ) return -EINVAL;
+ if (!dma)
+ return -EINVAL;
- spin_lock( &dev->count_lock );
- if ( atomic_read( &dev->buf_alloc ) ) {
- spin_unlock( &dev->count_lock );
+ 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 );
+ spin_unlock(&dev->count_lock);
- if ( copy_from_user( &request, argp, sizeof(request) ) )
+ 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)) ) {
+ 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;
+ unsigned long token = dev->agp_buffer_token;
- if ( !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
+ down_write(¤t->mm->mmap_sem);
+ virtual = do_mmap(filp, 0, map->size,
+ PROT_READ | PROT_WRITE,
+ MAP_SHARED, token);
+ up_write(¤t->mm->mmap_sem);
} 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
+ down_write(¤t->mm->mmap_sem);
+ virtual = do_mmap(filp, 0, dma->byte_count,
+ PROT_READ | PROT_WRITE,
+ MAP_SHARED, 0);
+ up_write(¤t->mm->mmap_sem);
}
- if ( virtual > -1024UL ) {
+ 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) ) ) {
+ 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) ) ) {
+ 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) ) ) {
+ 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) ) ) {
+ address = virtual + dma->buflist[i]->offset; /* *** */
+ if (copy_to_user(&request.list[i].address,
+ &address, sizeof(address))) {
retcode = -EFAULT;
goto done;
}
}
}
- done:
+ done:
request.count = dma->buf_count;
- DRM_DEBUG( "%d buffers, retcode = %d\n", request.count, retcode );
+ DRM_DEBUG("%d buffers, retcode = %d\n", request.count, retcode);
- if ( copy_to_user( argp, &request, sizeof(request) ) )
+ if (copy_to_user(argp, &request, sizeof(request)))
return -EFAULT;
return retcode;
}
+/**
+ * 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;
+}
+EXPORT_SYMBOL(drm_order);
+
+
git://git.onelab.eu / linux-2.6.git / blobdiff