Add support for tracking drawable information to core

Actually make the existing ioctls for adding and removing drawables do
something useful, and add another ioctl for the X server to update drawable
information. The only kind of drawable information tracked so far is cliprects.
(cherry picked from 29598e5253ff5c085ccf63580fd24b84db848424 commit)

9 files changed, 314 insertions, 109 deletions

diff --git a/bsd-core/drm_drawable.c b/bsd-core/drm_drawable.c
index 379e0aa7..d64bbe10 100644..120000
--- a/bsd-core/drm_drawable.c
+++ b/bsd-core/drm_drawable.c
@@ -1,51 +1 @@
-/* drm_drawable.h -- IOCTLs for drawables -*- linux-c -*-
- * 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.
- * 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.
- *
- * Authors:
- *    Rickard E. (Rik) Faith <faith@valinux.com>
- *    Gareth Hughes <gareth@valinux.com>
- *
- */
-
-#include "drmP.h"
-
-int drm_adddraw(DRM_IOCTL_ARGS)
-{
-	drm_draw_t draw;
-
-	draw.handle = 0;	/* NOOP */
-	DRM_DEBUG("%d\n", draw.handle);
-	
-	DRM_COPY_TO_USER_IOCTL( (drm_draw_t *)data, draw, sizeof(draw) );
-
-	return 0;
-}
-
-int drm_rmdraw(DRM_IOCTL_ARGS)
-{
-	return 0;		/* NOOP */
-}
+../shared-core/drm_drawable.c
\ No newline at end of file
diff --git a/libdrm/xf86drm.c b/libdrm/xf86drm.c
index 31d1c164..ab884eb5 100644
--- a/libdrm/xf86drm.c
+++ b/libdrm/xf86drm.c
@@ -1398,6 +1398,22 @@ int drmDestroyDrawable(int fd, drm_drawable_t handle)
     return 0;
 }
 
+int drmUpdateDrawableInfo(int fd, drm_drawable_t handle,
+			   drm_drawable_info_type_t type, unsigned int num,
+			   void *data)
+{
+    drm_update_draw_t update;
+
+    update.handle = handle;
+    update.type = type;
+    update.num = num;
+    update.data = (unsigned long long)(unsigned long)data;
+
+    if (ioctl(fd, DRM_IOCTL_UPDATE_DRAW, &update)) return -errno;
+
+    return 0;
+}
+
 /**
  * Acquire the AGP device.
  *
diff --git a/libdrm/xf86drm.h b/libdrm/xf86drm.h
index d97681c0..d39974de 100644
--- a/libdrm/xf86drm.h
+++ b/libdrm/xf86drm.h
@@ -545,6 +545,9 @@ extern int           drmSwitchToContext(int fd, drm_context_t context);
 extern int           drmDestroyContext(int fd, drm_context_t handle);
 extern int           drmCreateDrawable(int fd, drm_drawable_t * handle);
 extern int           drmDestroyDrawable(int fd, drm_drawable_t handle);
+extern int           drmUpdateDrawableInfo(int fd, drm_drawable_t handle,
+					   drm_drawable_info_type_t type,
+					   unsigned int num, void *data);
 extern int           drmCtlInstHandler(int fd, int irq);
 extern int           drmCtlUninstHandler(int fd);
 
diff --git a/linux-core/Makefile b/linux-core/Makefile
index 32828d28..3aecec43 100644
--- a/linux-core/Makefile
+++ b/linux-core/Makefile
@@ -75,8 +75,8 @@ DRM_MODULES ?= $(MODULE_LIST)
 
 # These definitions are for handling dependencies in the out of kernel build.
 
-DRMSHARED =     drm.h drm_sarea.h
-DRMHEADERS =    drmP.h drm_compat.h drm_os_linux.h $(DRMSHARED)
+DRMSHARED =     drm.h drm_sarea.h drm_drawable.c
+DRMHEADERS =    drmP.h drm_compat.h drm_os_linux.h drm.h drm_sarea.h
 COREHEADERS =   drm_core.h drm_sman.h drm_hashtab.h 
 
 TDFXHEADERS =   tdfx_drv.h $(DRMHEADERS)
diff --git a/linux-core/drmP.h b/linux-core/drmP.h
index 60354bce..8a099ba1 100644
--- a/linux-core/drmP.h
+++ b/linux-core/drmP.h
@@ -954,6 +954,14 @@ typedef struct drm_device {
 	drm_fence_manager_t fm;
 	drm_buffer_manager_t bm;
   
+	/** \name Drawable information */
+	/*@{ */
+	spinlock_t drw_lock;
+	unsigned int drw_bitfield_length;
+	u32 *drw_bitfield;
+	unsigned int drw_info_length;
+	drm_drawable_info_t **drw_info;
+	/*@} */
 } drm_device_t;
 
 #if __OS_HAS_AGP
@@ -1161,6 +1169,8 @@ extern int drm_adddraw(struct inode *inode, struct file *filp,
 		       unsigned int cmd, unsigned long arg);
 extern int drm_rmdraw(struct inode *inode, struct file *filp,
 		      unsigned int cmd, unsigned long arg);
+extern drm_drawable_info_t *drm_get_drawable_info(drm_device_t *dev,
+						  drm_drawable_t id);
 
 				/* Authentication IOCTL support (drm_auth.h) */
 extern int drm_getmagic(struct inode *inode, struct file *filp,
diff --git a/linux-core/drm_drawable.c b/linux-core/drm_drawable.c
index 7857453c..d64bbe10 100644..120000
--- a/linux-core/drm_drawable.c
+++ b/linux-core/drm_drawable.c
@@ -1,56 +1 @@
-/**
- * \file drm_drawable.c
- * IOCTLs for drawables
- *
- * \author Rickard E. (Rik) Faith <faith@valinux.com>
- * \author Gareth Hughes <gareth@valinux.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.
- * 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"
-
-/** No-op. */
-int drm_adddraw(struct inode *inode, struct file *filp,
-		unsigned int cmd, unsigned long arg)
-{
-	drm_draw_t draw;
-
-	draw.handle = 0;	/* NOOP */
-	DRM_DEBUG("%d\n", draw.handle);
-	if (copy_to_user((drm_draw_t __user *) arg, &draw, sizeof(draw)))
-		return -EFAULT;
-	return 0;
-}
-
-/** No-op. */
-int drm_rmdraw(struct inode *inode, struct file *filp,
-	       unsigned int cmd, unsigned long arg)
-{
-	return 0;		/* NOOP */
-}
+../shared-core/drm_drawable.c
\ No newline at end of file
diff --git a/linux-core/drm_stub.c b/linux-core/drm_stub.c
index c4f33813..5d28284c 100644
--- a/linux-core/drm_stub.c
+++ b/linux-core/drm_stub.c
@@ -67,6 +67,7 @@ static int drm_fill_in_dev(drm_device_t * dev, struct pci_dev *pdev,
 	int retcode;
 
 	spin_lock_init(&dev->count_lock);
+	spin_lock_init(&dev->drw_lock);
 	init_timer(&dev->timer);
 	mutex_init(&dev->struct_mutex);
 	mutex_init(&dev->ctxlist_mutex);
diff --git a/shared-core/drm.h b/shared-core/drm.h
index c2bcf62c..0b241117 100644
--- a/shared-core/drm.h
+++ b/shared-core/drm.h
@@ -165,6 +165,14 @@ typedef struct drm_clip_rect {
 } drm_clip_rect_t;
 
 /**
+ * Drawable information.
+ */
+typedef struct drm_drawable_info {
+	unsigned int num_rects;
+	drm_clip_rect_t *rects;
+} drm_drawable_info_t;
+
+/**
  * Texture region,
  */
 typedef struct drm_tex_region {
@@ -515,6 +523,20 @@ typedef struct drm_draw {
 } drm_draw_t;
 
 /**
+ * DRM_IOCTL_UPDATE_DRAW ioctl argument type.
+ */
+typedef enum {
+	DRM_DRAWABLE_CLIPRECTS,
+} drm_drawable_info_type_t;
+
+typedef struct drm_update_draw {
+	drm_drawable_t handle;
+	unsigned int type;
+	unsigned int num;
+	unsigned long long data;
+} drm_update_draw_t;
+
+/**
  * DRM_IOCTL_GET_MAGIC and DRM_IOCTL_AUTH_MAGIC ioctl argument type.
  */
 typedef struct drm_auth {
@@ -901,6 +923,8 @@ typedef union drm_mm_init_arg{
 #define DRM_IOCTL_MM_INIT               DRM_IOWR(0x3e, drm_mm_init_arg_t)
 #endif
 
+#define DRM_IOCTL_UPDATE_DRAW           DRM_IOW(0x3f, drm_update_draw_t)
+
 /*@}*/
 
 /**
diff --git a/shared-core/drm_drawable.c b/shared-core/drm_drawable.c
new file mode 100644
index 00000000..ca6eb81c
--- /dev/null
+++ b/shared-core/drm_drawable.c
@@ -0,0 +1,256 @@
+/**
+ * \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.
+ * 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"
+
+/** No-op. */
+int drm_adddraw(DRM_IOCTL_ARGS)
+{
+	DRM_DEVICE;
+	unsigned int irqflags;
+	int i, j = 0;
+	drm_draw_t draw;
+
+	spin_lock_irqsave(&dev->drw_lock, irqflags);
+
+	for (i = 0; i < dev->drw_bitfield_length; i++) {
+		u32 bitfield = dev->drw_bitfield[i];
+
+		if (bitfield == ~0)
+			continue;
+
+		for (; j < sizeof(bitfield); j++)
+			if (!(bitfield & (1 << j)))
+				goto done;
+	}
+done:
+
+	if (i == dev->drw_bitfield_length) {
+		u32 *new_bitfield = drm_realloc(dev->drw_bitfield, i * 4,
+						(i + 1) * 4, DRM_MEM_BUFS);
+
+		if (!new_bitfield) {
+			DRM_ERROR("Failed to allocate new drawable bitfield\n");
+			spin_unlock_irqrestore(&dev->drw_lock, irqflags);
+			return DRM_ERR(ENOMEM);
+		}
+
+		if (32 * (i + 1) > dev->drw_info_length) {
+			void *new_info = drm_realloc(dev->drw_info,
+						     dev->drw_info_length *
+						     sizeof(drm_drawable_info_t*),
+						     32 * (i + 1) *
+						     sizeof(drm_drawable_info_t*),
+						     DRM_MEM_BUFS);
+
+			if (!new_info) {
+				DRM_ERROR("Failed to allocate new drawable info"
+					  " array\n");
+
+				drm_free(new_bitfield, (i + 1) * 4, DRM_MEM_BUFS);
+				spin_unlock_irqrestore(&dev->drw_lock, irqflags);
+				return DRM_ERR(ENOMEM);
+			}
+
+			dev->drw_info = (drm_drawable_info_t**)new_info;
+		}
+
+		new_bitfield[i] = 0;
+
+		dev->drw_bitfield = new_bitfield;
+		dev->drw_bitfield_length++;
+	}
+
+	dev->drw_bitfield[i] |= 1 << j;
+
+	draw.handle = i * sizeof(u32) + j;
+	DRM_DEBUG("%d\n", draw.handle);
+
+	dev->drw_info[draw.handle] = NULL;
+
+	spin_unlock_irqrestore(&dev->drw_lock, irqflags);
+
+	DRM_COPY_TO_USER_IOCTL((drm_draw_t __user *)data, draw, sizeof(draw));
+
+	return 0;
+}
+
+/** No-op. */
+int drm_rmdraw(DRM_IOCTL_ARGS)
+{
+	DRM_DEVICE;
+	drm_draw_t draw;
+	unsigned int idx, mod;
+	unsigned int irqflags;
+
+	DRM_COPY_FROM_USER_IOCTL(draw, (drm_draw_t __user *) data,
+				 sizeof(draw));
+
+	idx = draw.handle / 32;
+	mod = draw.handle % 32;
+
+	spin_lock_irqsave(&dev->drw_lock, irqflags);
+
+	if (idx >= dev->drw_bitfield_length ||
+	    !(dev->drw_bitfield[idx] & (1 << mod))) {
+		DRM_DEBUG("No such drawable %d\n", draw.handle);
+		spin_unlock_irqrestore(&dev->drw_lock, irqflags);
+		return 0;
+	}
+
+	dev->drw_bitfield[idx] &= ~(1 << mod);
+
+	if (idx == (dev->drw_bitfield_length - 1)) {
+		while (idx >= 0 && !dev->drw_bitfield[idx])
+			--idx;
+
+		if (idx != draw.handle / 32) {
+			u32 *new_bitfield = drm_realloc(dev->drw_bitfield,
+							dev->drw_bitfield_length * 4,
+							(idx + 1) * 4,
+							DRM_MEM_BUFS);
+
+			if (new_bitfield || idx == -1) {
+				dev->drw_bitfield = new_bitfield;
+				dev->drw_bitfield_length = idx + 1;
+			}
+		}
+	}
+
+	if (32 * dev->drw_bitfield_length < dev->drw_info_length) {
+		void *new_info = drm_realloc(dev->drw_info,
+					     dev->drw_info_length *
+					     sizeof(drm_drawable_info_t*),
+					     32 * dev->drw_bitfield_length *
+					     sizeof(drm_drawable_info_t*),
+					     DRM_MEM_BUFS);
+
+		if (new_info || !dev->drw_bitfield_length) {
+			dev->drw_info = (drm_drawable_info_t**)new_info;
+			dev->drw_info_length = 32 * dev->drw_bitfield_length;
+		}
+	}
+
+	spin_unlock_irqrestore(&dev->drw_lock, irqflags);
+
+	return 0;
+}
+
+int drm_update_drawable_info(DRM_IOCTL_ARGS) {
+	DRM_DEVICE;
+	drm_update_draw_t update;
+	unsigned int id, idx, mod;
+	unsigned int irqflags;
+	drm_drawable_info_t *info;
+	void *new_data;
+
+	DRM_COPY_FROM_USER_IOCTL(update, (drm_update_draw_t __user *) data,
+				 sizeof(update));
+
+	id = update.handle;
+	idx = id / 32;
+	mod = id % 32;
+
+	spin_lock_irqsave(&dev->drw_lock, irqflags);
+
+	if (idx >= dev->drw_bitfield_length ||
+	    !(dev->drw_bitfield[idx] & (1 << mod))) {
+		DRM_ERROR("No such drawable %d\n", update.handle);
+		spin_unlock_irqrestore(&dev->drw_lock, irqflags);
+		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");
+			spin_unlock_irqrestore(&dev->drw_lock, irqflags);
+			return DRM_ERR(ENOMEM);
+		}
+
+		dev->drw_info[id] = info;
+	}
+
+	switch (update.type) {
+	case DRM_DRAWABLE_CLIPRECTS:
+		new_data = drm_alloc(update.num * sizeof(drm_clip_rect_t),
+				     DRM_MEM_BUFS);
+
+		if (!new_data) {
+			DRM_ERROR("Failed to allocate cliprect memory\n");
+			spin_unlock_irqrestore(&dev->drw_lock, irqflags);
+			return DRM_ERR(ENOMEM);
+		}
+
+		if (DRM_COPY_FROM_USER(new_data,
+				       (drm_clip_rect_t __user *) 
+				       (unsigned long)update.data,
+				       update.num * sizeof(drm_clip_rect_t))) {
+			DRM_ERROR("Failed to copy cliprects from userspace\n");
+			spin_unlock_irqrestore(&dev->drw_lock, irqflags);
+			return DRM_ERR(EFAULT);
+		}
+
+		drm_free(info->rects, info->num_rects * sizeof(drm_clip_rect_t),
+			 DRM_MEM_BUFS);
+
+		info->rects = new_data;
+		info->num_rects = update.num;
+		break;
+	}
+
+	spin_unlock_irqrestore(&dev->drw_lock, irqflags);
+
+	return 0;
+}
+
+/**
+ * Caller must hold the drawable spinlock!
+ */
+drm_drawable_info_t *drm_get_drawable_info(drm_device_t *dev, drm_drawable_t id) {
+	unsigned int idx = id / 32, mod = id % 32;
+
+	if (idx >= dev->drw_bitfield_length ||
+	    !(dev->drw_bitfield[idx] & (1 << mod))) {
+		DRM_DEBUG("No such drawable %d\n", id);
+		return NULL;
+	}
+
+	return dev->drw_info[id];
+}