diff options
Diffstat (limited to 'linux-core')
| -rw-r--r-- | linux-core/drmP.h | 1 | ||||
| -rw-r--r-- | linux-core/drm_bufs.c | 35 |
2 files changed, 31 insertions, 5 deletions
diff --git a/linux-core/drmP.h b/linux-core/drmP.h index b095d86f..f3a76c2a 100644 --- a/linux-core/drmP.h +++ b/linux-core/drmP.h @@ -868,6 +868,7 @@ extern int drm_freebufs(struct inode *inode, struct file *filp, unsigned int cmd, unsigned long arg); extern int drm_mapbufs(struct inode *inode, struct file *filp, unsigned int cmd, unsigned long arg); +extern int drm_order(unsigned long size); /* DMA support (drm_dma.h) */ extern int drm_dma_setup(drm_device_t * dev); diff --git a/linux-core/drm_bufs.c b/linux-core/drm_bufs.c index ca5aacae..8ade8f38 100644 --- a/linux-core/drm_bufs.c +++ b/linux-core/drm_bufs.c @@ -212,7 +212,7 @@ int drm_addmap(struct inode *inode, struct file *filp, case _DRM_SHM: map->handle = vmalloc_32(map->size); DRM_DEBUG("%lu %d %p\n", - map->size, get_order(map->size), map->handle); + map->size, drm_order(map->size), map->handle); if (!map->handle) { drm_free(map, sizeof(*map), DRM_MEM_MAPS); return -ENOMEM; @@ -440,7 +440,7 @@ int drm_addbufs_agp(struct inode *inode, struct file *filp, return -EFAULT; count = request.count; - order = get_order(request.size); + order = drm_order(request.size); size = 1 << order; alignment = (request.flags & _DRM_PAGE_ALIGN) @@ -609,7 +609,7 @@ int drm_addbufs_pci(struct inode *inode, struct file *filp, return -EFAULT; count = request.count; - order = get_order(request.size); + order = drm_order(request.size); size = 1 << order; DRM_DEBUG("count=%d, size=%d (%d), order=%d, queue_count=%d\n", @@ -835,7 +835,7 @@ int drm_addbufs_sg(struct inode *inode, struct file *filp, return -EFAULT; count = request.count; - order = get_order(request.size); + order = drm_order(request.size); size = 1 << order; alignment = (request.flags & _DRM_PAGE_ALIGN) @@ -1137,7 +1137,7 @@ int drm_markbufs(struct inode *inode, struct file *filp, DRM_DEBUG("%d, %d, %d\n", request.size, request.low_mark, request.high_mark); - order = get_order(request.size); + order = drm_order(request.size); if (order < DRM_MIN_ORDER || order > DRM_MAX_ORDER) return -EINVAL; entry = &dma->bufs[order]; @@ -1332,3 +1332,28 @@ int drm_mapbufs(struct inode *inode, struct file *filp, 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); + |