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path: root/drivers/gpu/drm/drm_drawable.c
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Diffstat (limited to 'drivers/gpu/drm/drm_drawable.c')
-rw-r--r--drivers/gpu/drm/drm_drawable.c192
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 00000000000..1839c57663c
--- /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);
+}