diff options
Diffstat (limited to 'drivers/gpu/drm/drm_drawable.c')
| -rw-r--r-- | drivers/gpu/drm/drm_drawable.c | 192 |
1 files changed, 192 insertions, 0 deletions
diff --git a/drivers/gpu/drm/drm_drawable.c b/drivers/gpu/drm/drm_drawable.c new file mode 100644 index 0000000..1839c57 --- /dev/null +++ b/drivers/gpu/drm/drm_drawable.c @@ -0,0 +1,192 @@ +/** + * \file drm_drawable.c + * IOCTLs for drawables + * + * \author Rickard E. (Rik) Faith <faith@valinux.com> + * \author Gareth Hughes <gareth@valinux.com> + * \author Michel Dänzer <michel@tungstengraphics.com> + */ + +/* + * Created: Tue Feb 2 08:37:54 1999 by faith@valinux.com + * + * Copyright 1999 Precision Insight, Inc., Cedar Park, Texas. + * Copyright 2000 VA Linux Systems, Inc., Sunnyvale, California. + * Copyright 2006 Tungsten Graphics, Inc., Bismarck, North Dakota. + * 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 "drmP.h" + +/** + * Allocate drawable ID and memory to store information about it. + */ +int drm_adddraw(struct drm_device *dev, void *data, struct drm_file *file_priv) +{ + unsigned long irqflags; + struct drm_draw *draw = data; + int new_id = 0; + int ret; + +again: + if (idr_pre_get(&dev->drw_idr, GFP_KERNEL) == 0) { + DRM_ERROR("Out of memory expanding drawable idr\n"); + return -ENOMEM; + } + + spin_lock_irqsave(&dev->drw_lock, irqflags); + ret = idr_get_new_above(&dev->drw_idr, NULL, 1, &new_id); + if (ret == -EAGAIN) { + spin_unlock_irqrestore(&dev->drw_lock, irqflags); + goto again; + } + + spin_unlock_irqrestore(&dev->drw_lock, irqflags); + + draw->handle = new_id; + + DRM_DEBUG("%d\n", draw->handle); + + return 0; +} + +/** + * Free drawable ID and memory to store information about it. + */ +int drm_rmdraw(struct drm_device *dev, void *data, struct drm_file *file_priv) +{ + struct drm_draw *draw = data; + unsigned long irqflags; + + spin_lock_irqsave(&dev->drw_lock, irqflags); + + drm_free(drm_get_drawable_info(dev, draw->handle), + sizeof(struct drm_drawable_info), DRM_MEM_BUFS); + + idr_remove(&dev->drw_idr, draw->handle); + + spin_unlock_irqrestore(&dev->drw_lock, irqflags); + DRM_DEBUG("%d\n", draw->handle); + return 0; +} + +int drm_update_drawable_info(struct drm_device *dev, void *data, struct drm_file *file_priv) +{ + struct drm_update_draw *update = data; + unsigned long irqflags; + struct drm_clip_rect *rects; + struct drm_drawable_info *info; + int err; + + info = idr_find(&dev->drw_idr, update->handle); + if (!info) { + info = drm_calloc(1, sizeof(*info), DRM_MEM_BUFS); + if (!info) + return -ENOMEM; + if (IS_ERR(idr_replace(&dev->drw_idr, info, update->handle))) { + DRM_ERROR("No such drawable %d\n", update->handle); + drm_free(info, sizeof(*info), DRM_MEM_BUFS); + return -EINVAL; + } + } + + switch (update->type) { + case DRM_DRAWABLE_CLIPRECTS: + if (update->num != info->num_rects) { + rects = drm_alloc(update->num * sizeof(struct drm_clip_rect), + DRM_MEM_BUFS); + } else + rects = info->rects; + + if (update->num && !rects) { + DRM_ERROR("Failed to allocate cliprect memory\n"); + err = -ENOMEM; + goto error; + } + + if (update->num && DRM_COPY_FROM_USER(rects, + (struct drm_clip_rect __user *) + (unsigned long)update->data, + update->num * + sizeof(*rects))) { + DRM_ERROR("Failed to copy cliprects from userspace\n"); + err = -EFAULT; + goto error; + } + + spin_lock_irqsave(&dev->drw_lock, irqflags); + + if (rects != info->rects) { + drm_free(info->rects, info->num_rects * + sizeof(struct drm_clip_rect), DRM_MEM_BUFS); + } + + info->rects = rects; + info->num_rects = update->num; + + spin_unlock_irqrestore(&dev->drw_lock, irqflags); + + DRM_DEBUG("Updated %d cliprects for drawable %d\n", + info->num_rects, update->handle); + break; + default: + DRM_ERROR("Invalid update type %d\n", update->type); + return -EINVAL; + } + + return 0; + +error: + if (rects != info->rects) + drm_free(rects, update->num * sizeof(struct drm_clip_rect), + DRM_MEM_BUFS); + + return err; +} + +/** + * Caller must hold the drawable spinlock! + */ +struct drm_drawable_info *drm_get_drawable_info(struct drm_device *dev, drm_drawable_t id) +{ + return idr_find(&dev->drw_idr, id); +} +EXPORT_SYMBOL(drm_get_drawable_info); + +static int drm_drawable_free(int idr, void *p, void *data) +{ + struct drm_drawable_info *info = p; + + if (info) { + drm_free(info->rects, info->num_rects * + sizeof(struct drm_clip_rect), DRM_MEM_BUFS); + drm_free(info, sizeof(*info), DRM_MEM_BUFS); + } + + return 0; +} + +void drm_drawable_free_all(struct drm_device *dev) +{ + idr_for_each(&dev->drw_idr, drm_drawable_free, NULL); + idr_remove_all(&dev->drw_idr); +} |
