Merge branch 'master' into crestline

Conflicts:

	shared-core/i915_dma.c

1 files changed, 330 insertions, 0 deletions

diff --git a/shared-core/drm_drawable.c b/shared-core/drm_drawable.c
new file mode 100644
index 00000000..0817e321
--- /dev/null
+++ b/shared-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);