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-rw-r--r--linux-core/drm_drawable.c330
1 files changed, 330 insertions, 0 deletions
diff --git a/linux-core/drm_drawable.c b/linux-core/drm_drawable.c
new file mode 100644
index 00000000..0817e321
--- /dev/null
+++ b/linux-core/drm_drawable.c
@@ -0,0 +1,330 @@
+/**
+ * \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(DRM_IOCTL_ARGS)
+{
+ DRM_DEVICE;
+ unsigned long irqflags;
+ int i, j;
+ u32 *bitfield = dev->drw_bitfield;
+ unsigned int bitfield_length = dev->drw_bitfield_length;
+ drm_drawable_info_t **info = dev->drw_info;
+ unsigned int info_length = dev->drw_info_length;
+ drm_draw_t draw;
+
+ for (i = 0, j = 0; i < bitfield_length; i++) {
+ if (bitfield[i] == ~0)
+ continue;
+
+ for (; j < 8 * sizeof(*bitfield); j++)
+ if (!(bitfield[i] & (1 << j)))
+ goto done;
+ }
+done:
+
+ if (i == bitfield_length) {
+ bitfield_length++;
+
+ bitfield = drm_alloc(bitfield_length * sizeof(*bitfield),
+ DRM_MEM_BUFS);
+
+ if (!bitfield) {
+ DRM_ERROR("Failed to allocate new drawable bitfield\n");
+ return DRM_ERR(ENOMEM);
+ }
+
+ if (8 * sizeof(*bitfield) * bitfield_length > info_length) {
+ info_length += 8 * sizeof(*bitfield);
+
+ info = drm_alloc(info_length * sizeof(*info),
+ DRM_MEM_BUFS);
+
+ if (!info) {
+ DRM_ERROR("Failed to allocate new drawable info"
+ " array\n");
+
+ drm_free(bitfield,
+ bitfield_length * sizeof(*bitfield),
+ DRM_MEM_BUFS);
+ return DRM_ERR(ENOMEM);
+ }
+ }
+
+ bitfield[i] = 0;
+ }
+
+ draw.handle = i * 8 * sizeof(*bitfield) + j + 1;
+ DRM_DEBUG("%d\n", draw.handle);
+
+ spin_lock_irqsave(&dev->drw_lock, irqflags);
+
+ bitfield[i] |= 1 << j;
+ info[draw.handle - 1] = NULL;
+
+ if (bitfield != dev->drw_bitfield) {
+ memcpy(bitfield, dev->drw_bitfield, dev->drw_bitfield_length *
+ sizeof(*bitfield));
+ drm_free(dev->drw_bitfield, sizeof(*bitfield) *
+ dev->drw_bitfield_length, DRM_MEM_BUFS);
+ dev->drw_bitfield = bitfield;
+ dev->drw_bitfield_length = bitfield_length;
+ }
+
+ if (info != dev->drw_info) {
+ memcpy(info, dev->drw_info, dev->drw_info_length *
+ sizeof(*info));
+ drm_free(dev->drw_info, sizeof(*info) * dev->drw_info_length,
+ DRM_MEM_BUFS);
+ dev->drw_info = info;
+ dev->drw_info_length = info_length;
+ }
+
+ spin_unlock_irqrestore(&dev->drw_lock, irqflags);
+
+ DRM_COPY_TO_USER_IOCTL((drm_draw_t __user *)data, draw, sizeof(draw));
+
+ return 0;
+}
+
+/**
+ * Free drawable ID and memory to store information about it.
+ */
+int drm_rmdraw(DRM_IOCTL_ARGS)
+{
+ DRM_DEVICE;
+ drm_draw_t draw;
+ int id, idx;
+ unsigned int shift;
+ unsigned long irqflags;
+ u32 *bitfield = dev->drw_bitfield;
+ unsigned int bitfield_length = dev->drw_bitfield_length;
+ drm_drawable_info_t **info = dev->drw_info;
+ unsigned int info_length = dev->drw_info_length;
+
+ DRM_COPY_FROM_USER_IOCTL(draw, (drm_draw_t __user *) data,
+ sizeof(draw));
+
+ id = draw.handle - 1;
+ idx = id / (8 * sizeof(*bitfield));
+ shift = id % (8 * sizeof(*bitfield));
+
+ if (idx < 0 || idx >= bitfield_length ||
+ !(bitfield[idx] & (1 << shift))) {
+ DRM_DEBUG("No such drawable %d\n", draw.handle);
+ return 0;
+ }
+
+ spin_lock_irqsave(&dev->drw_lock, irqflags);
+
+ bitfield[idx] &= ~(1 << shift);
+
+ spin_unlock_irqrestore(&dev->drw_lock, irqflags);
+
+ if (info[id]) {
+ drm_free(info[id]->rects, info[id]->num_rects *
+ sizeof(drm_clip_rect_t), DRM_MEM_BUFS);
+ drm_free(info[id], sizeof(**info), DRM_MEM_BUFS);
+ }
+
+ /* Can we shrink the arrays? */
+ if (idx == bitfield_length - 1) {
+ while (idx >= 0 && !bitfield[idx])
+ --idx;
+
+ bitfield_length = idx + 1;
+
+ if (idx != id / (8 * sizeof(*bitfield)))
+ bitfield = drm_alloc(bitfield_length *
+ sizeof(*bitfield), DRM_MEM_BUFS);
+
+ if (!bitfield && bitfield_length) {
+ bitfield = dev->drw_bitfield;
+ bitfield_length = dev->drw_bitfield_length;
+ }
+ }
+
+ if (bitfield != dev->drw_bitfield) {
+ info_length = 8 * sizeof(*bitfield) * bitfield_length;
+
+ info = drm_alloc(info_length * sizeof(*info), DRM_MEM_BUFS);
+
+ if (!info && info_length) {
+ info = dev->drw_info;
+ info_length = dev->drw_info_length;
+ }
+
+ spin_lock_irqsave(&dev->drw_lock, irqflags);
+
+ memcpy(bitfield, dev->drw_bitfield, bitfield_length *
+ sizeof(*bitfield));
+ drm_free(dev->drw_bitfield, sizeof(*bitfield) *
+ dev->drw_bitfield_length, DRM_MEM_BUFS);
+ dev->drw_bitfield = bitfield;
+ dev->drw_bitfield_length = bitfield_length;
+
+ if (info != dev->drw_info) {
+ memcpy(info, dev->drw_info, info_length *
+ sizeof(*info));
+ drm_free(dev->drw_info, sizeof(*info) *
+ dev->drw_info_length, DRM_MEM_BUFS);
+ dev->drw_info = info;
+ dev->drw_info_length = info_length;
+ }
+
+ spin_unlock_irqrestore(&dev->drw_lock, irqflags);
+ }
+
+ DRM_DEBUG("%d\n", draw.handle);
+ return 0;
+}
+
+int drm_update_drawable_info(DRM_IOCTL_ARGS) {
+ DRM_DEVICE;
+ drm_update_draw_t update;
+ unsigned int id, idx, shift, bitfield_length = dev->drw_bitfield_length;
+ u32 *bitfield = dev->drw_bitfield;
+ unsigned long irqflags;
+ drm_drawable_info_t *info;
+ drm_clip_rect_t *rects;
+ int err;
+
+ DRM_COPY_FROM_USER_IOCTL(update, (drm_update_draw_t __user *) data,
+ sizeof(update));
+
+ id = update.handle - 1;
+ idx = id / (8 * sizeof(*bitfield));
+ shift = id % (8 * sizeof(*bitfield));
+
+ if (idx < 0 || idx >= bitfield_length ||
+ !(bitfield[idx] & (1 << shift))) {
+ DRM_ERROR("No such drawable %d\n", update.handle);
+ return DRM_ERR(EINVAL);
+ }
+
+ info = dev->drw_info[id];
+
+ if (!info) {
+ info = drm_calloc(1, sizeof(drm_drawable_info_t), DRM_MEM_BUFS);
+
+ if (!info) {
+ DRM_ERROR("Failed to allocate drawable info memory\n");
+ return DRM_ERR(ENOMEM);
+ }
+ }
+
+ switch (update.type) {
+ case DRM_DRAWABLE_CLIPRECTS:
+ if (update.num != info->num_rects) {
+ rects = drm_alloc(update.num * sizeof(drm_clip_rect_t),
+ DRM_MEM_BUFS);
+ } else
+ rects = info->rects;
+
+ if (update.num && !rects) {
+ DRM_ERROR("Failed to allocate cliprect memory\n");
+ err = DRM_ERR(ENOMEM);
+ goto error;
+ }
+
+ if (update.num && DRM_COPY_FROM_USER(rects,
+ (drm_clip_rect_t __user *)
+ (unsigned long)update.data,
+ update.num *
+ sizeof(*rects))) {
+ DRM_ERROR("Failed to copy cliprects from userspace\n");
+ err = DRM_ERR(EFAULT);
+ goto error;
+ }
+
+ spin_lock_irqsave(&dev->drw_lock, irqflags);
+
+ if (rects != info->rects) {
+ drm_free(info->rects, info->num_rects *
+ sizeof(drm_clip_rect_t), DRM_MEM_BUFS);
+ }
+
+ info->rects = rects;
+ info->num_rects = update.num;
+ dev->drw_info[id] = info;
+
+ spin_unlock_irqrestore(&dev->drw_lock, irqflags);
+
+ DRM_DEBUG("Updated %d cliprects for drawable %d\n",
+ info->num_rects, id);
+ break;
+ default:
+ DRM_ERROR("Invalid update type %d\n", update.type);
+ return DRM_ERR(EINVAL);
+ }
+
+ return 0;
+
+error:
+ if (!dev->drw_info[id])
+ drm_free(info, sizeof(*info), DRM_MEM_BUFS);
+ else if (rects != dev->drw_info[id]->rects)
+ drm_free(rects, update.num *
+ sizeof(drm_clip_rect_t), DRM_MEM_BUFS);
+
+ return err;
+}
+
+/**
+ * Caller must hold the drawable spinlock!
+ */
+drm_drawable_info_t *drm_get_drawable_info(drm_device_t *dev, drm_drawable_t id) {
+ u32 *bitfield = dev->drw_bitfield;
+ unsigned int idx, shift;
+
+ id--;
+ idx = id / (8 * sizeof(*bitfield));
+ shift = id % (8 * sizeof(*bitfield));
+
+ if (idx < 0 || idx >= dev->drw_bitfield_length ||
+ !(bitfield[idx] & (1 << shift))) {
+ DRM_DEBUG("No such drawable %d\n", id);
+ return NULL;
+ }
+
+ return dev->drw_info[id];
+}
+EXPORT_SYMBOL(drm_get_drawable_info);
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