Merged bsd-1-0-1

1 files changed, 714 insertions, 0 deletions

diff --git a/bsd/mga/mga_drv.c b/bsd/mga/mga_drv.c
new file mode 100644
index 00000000..09937201
--- /dev/null
+++ b/bsd/mga/mga_drv.c
@@ -0,0 +1,714 @@
+/* mga_drv.c -- Matrox g200/g400 driver
+ * Created: Mon Dec 13 01:56:22 1999 by jhartmann@precisioninsight.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
+ * PRECISION INSIGHT 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>
+ *	    Jeff Hartmann <jhartmann@valinux.com>
+ *
+ *
+ */
+
+#include "drmP.h"
+#include "mga_drv.h"
+
+#include <pci/pcivar.h>
+
+MODULE_DEPEND(mga, drm, 1, 1, 1);
+MODULE_DEPEND(mga, agp, 1, 1, 1);
+
+#define MGA_NAME	 "mga"
+#define MGA_DESC	 "Matrox g200/g400"
+#define MGA_DATE	 "19991213"
+#define MGA_MAJOR	 1
+#define MGA_MINOR	 0
+#define MGA_PATCHLEVEL	 0
+
+drm_ctx_t		      mga_res_ctx;
+
+static int mga_probe(device_t dev)
+{
+	const char *s = 0;
+
+	switch (pci_get_devid(dev)) {
+	case 0x0525102b:
+		s = "Matrox MGA G400 AGP graphics accelerator";
+		break;
+
+	case 0x0521102b:
+		s = "Matrox MGA G200 AGP graphics accelerator";
+		break;
+	}
+
+	if (s) {
+		device_set_desc(dev, s);
+		return 0;
+	}
+
+	return ENXIO;
+}
+
+static int mga_attach(device_t dev)
+{
+	return mga_init(dev);
+}
+
+static int mga_detach(device_t dev)
+{
+	mga_cleanup(dev);
+	return 0;
+}
+
+static device_method_t mga_methods[] = {
+	/* Device interface */
+	DEVMETHOD(device_probe,		mga_probe),
+	DEVMETHOD(device_attach,	mga_attach),
+	DEVMETHOD(device_detach,	mga_detach),
+
+	{ 0, 0 }
+};
+
+static driver_t mga_driver = {
+	"drm",
+	mga_methods,
+	sizeof(drm_device_t),
+};
+
+static devclass_t mga_devclass;
+#define MGA_SOFTC(unit) \
+	((drm_device_t *) devclass_get_softc(mga_devclass, unit))
+
+DRIVER_MODULE(if_mga, pci, mga_driver, mga_devclass, 0, 0);
+
+#define CDEV_MAJOR	145
+				/* mga_drv.c */
+static struct cdevsw mga_cdevsw = {
+	/* open */	mga_open,
+	/* close */	mga_close,
+	/* read */	drm_read,
+	/* write */	drm_write,
+	/* ioctl */	mga_ioctl,
+	/* poll */	drm_poll,
+	/* mmap */	drm_mmap,
+	/* strategy */	nostrategy,
+	/* name */	"mga",
+	/* maj */	CDEV_MAJOR,
+	/* dump */	nodump,
+	/* psize */	nopsize,
+	/* flags */	D_TTY | D_TRACKCLOSE,
+	/* bmaj */	-1
+};
+
+static drm_ioctl_desc_t	      mga_ioctls[] = {
+	[DRM_IOCTL_NR(DRM_IOCTL_VERSION)]     = { mga_version,	  0, 0 },
+	[DRM_IOCTL_NR(DRM_IOCTL_GET_UNIQUE)]  = { drm_getunique,  0, 0 },
+	[DRM_IOCTL_NR(DRM_IOCTL_GET_MAGIC)]   = { drm_getmagic,	  0, 0 },
+	[DRM_IOCTL_NR(DRM_IOCTL_IRQ_BUSID)]   = { drm_irq_busid,  0, 1 },
+
+	[DRM_IOCTL_NR(DRM_IOCTL_SET_UNIQUE)]  = { drm_setunique,  1, 1 },
+	[DRM_IOCTL_NR(DRM_IOCTL_BLOCK)]	      = { drm_block,	  1, 1 },
+	[DRM_IOCTL_NR(DRM_IOCTL_UNBLOCK)]     = { drm_unblock,	  1, 1 },
+	[DRM_IOCTL_NR(DRM_IOCTL_CONTROL)]     = { mga_control,	  1, 1 },
+	[DRM_IOCTL_NR(DRM_IOCTL_AUTH_MAGIC)]  = { drm_authmagic,  1, 1 },
+	[DRM_IOCTL_NR(DRM_IOCTL_ADD_MAP)]     = { drm_addmap,	  1, 1 },
+	[DRM_IOCTL_NR(DRM_IOCTL_ADD_BUFS)]    = { mga_addbufs,	  1, 1 },
+	[DRM_IOCTL_NR(DRM_IOCTL_MARK_BUFS)]   = { mga_markbufs,	  1, 1 },
+	[DRM_IOCTL_NR(DRM_IOCTL_INFO_BUFS)]   = { mga_infobufs,	  1, 0 },
+	[DRM_IOCTL_NR(DRM_IOCTL_MAP_BUFS)]    = { mga_mapbufs,	  1, 0 },
+	[DRM_IOCTL_NR(DRM_IOCTL_FREE_BUFS)]   = { mga_freebufs,	  1, 0 },
+
+	[DRM_IOCTL_NR(DRM_IOCTL_ADD_CTX)]     = { mga_addctx,	  1, 1 },
+	[DRM_IOCTL_NR(DRM_IOCTL_RM_CTX)]      = { mga_rmctx,	  1, 1 },
+	[DRM_IOCTL_NR(DRM_IOCTL_MOD_CTX)]     = { mga_modctx,	  1, 1 },
+	[DRM_IOCTL_NR(DRM_IOCTL_GET_CTX)]     = { mga_getctx,	  1, 0 },
+	[DRM_IOCTL_NR(DRM_IOCTL_SWITCH_CTX)]  = { mga_switchctx,  1, 1 },
+	[DRM_IOCTL_NR(DRM_IOCTL_NEW_CTX)]     = { mga_newctx,	  1, 1 },
+	[DRM_IOCTL_NR(DRM_IOCTL_RES_CTX)]     = { mga_resctx,	  1, 0 },
+	[DRM_IOCTL_NR(DRM_IOCTL_ADD_DRAW)]    = { drm_adddraw,	  1, 1 },
+	[DRM_IOCTL_NR(DRM_IOCTL_RM_DRAW)]     = { drm_rmdraw,	  1, 1 },
+
+	[DRM_IOCTL_NR(DRM_IOCTL_DMA)]	      = { mga_dma,	  1, 0 },
+
+	[DRM_IOCTL_NR(DRM_IOCTL_LOCK)]	      = { mga_lock,	  1, 0 },
+	[DRM_IOCTL_NR(DRM_IOCTL_UNLOCK)]      = { mga_unlock,	  1, 0 },
+	[DRM_IOCTL_NR(DRM_IOCTL_FINISH)]      = { drm_finish,	  1, 0 },
+
+	[DRM_IOCTL_NR(DRM_IOCTL_AGP_ACQUIRE)] = { drm_agp_acquire, 1, 1 },
+	[DRM_IOCTL_NR(DRM_IOCTL_AGP_RELEASE)] = { drm_agp_release, 1, 1 },
+	[DRM_IOCTL_NR(DRM_IOCTL_AGP_ENABLE)]  = { drm_agp_enable,  1, 1 },
+	[DRM_IOCTL_NR(DRM_IOCTL_AGP_INFO)]    = { drm_agp_info,    1, 0 },
+	[DRM_IOCTL_NR(DRM_IOCTL_AGP_ALLOC)]   = { drm_agp_alloc,   1, 1 },
+	[DRM_IOCTL_NR(DRM_IOCTL_AGP_FREE)]    = { drm_agp_free,    1, 1 },
+	[DRM_IOCTL_NR(DRM_IOCTL_AGP_BIND)]    = { drm_agp_bind,    1, 1 },
+	[DRM_IOCTL_NR(DRM_IOCTL_AGP_UNBIND)]  = { drm_agp_unbind,  1, 1 },
+   	[DRM_IOCTL_NR(DRM_IOCTL_MGA_INIT)]    = { mga_dma_init,    1, 1 },
+   	[DRM_IOCTL_NR(DRM_IOCTL_MGA_SWAP)]    = { mga_swap_bufs,   1, 0 },
+   	[DRM_IOCTL_NR(DRM_IOCTL_MGA_CLEAR)]   = { mga_clear_bufs,  1, 0 },
+   	[DRM_IOCTL_NR(DRM_IOCTL_MGA_ILOAD)]   = { mga_iload,       1, 0 },
+   	[DRM_IOCTL_NR(DRM_IOCTL_MGA_VERTEX)]  = { mga_vertex,      1, 0 },
+   	[DRM_IOCTL_NR(DRM_IOCTL_MGA_FLUSH)]   = { mga_flush_ioctl, 1, 0 },
+   	[DRM_IOCTL_NR(DRM_IOCTL_MGA_INDICES)] = { mga_indices,     1, 0 },
+};
+
+#define MGA_IOCTL_COUNT DRM_ARRAY_SIZE(mga_ioctls)
+
+static int mga_setup(drm_device_t *dev)
+{
+	int i;
+	
+	device_busy(dev->device);
+
+	atomic_set(&dev->ioctl_count, 0);
+	atomic_set(&dev->vma_count, 0);
+	dev->buf_use	  = 0;
+	atomic_set(&dev->buf_alloc, 0);
+
+	drm_dma_setup(dev);
+
+	atomic_set(&dev->total_open, 0);
+	atomic_set(&dev->total_close, 0);
+	atomic_set(&dev->total_ioctl, 0);
+	atomic_set(&dev->total_irq, 0);
+	atomic_set(&dev->total_ctx, 0);
+	atomic_set(&dev->total_locks, 0);
+	atomic_set(&dev->total_unlocks, 0);
+	atomic_set(&dev->total_contends, 0);
+	atomic_set(&dev->total_sleeps, 0);
+
+	for (i = 0; i < DRM_HASH_SIZE; i++) {
+		dev->magiclist[i].head = NULL;
+		dev->magiclist[i].tail = NULL;
+	}
+	dev->maplist	    = NULL;
+	dev->map_count	    = 0;
+	dev->vmalist	    = NULL;
+	dev->lock.hw_lock   = NULL;
+	dev->lock.lock_queue = 0;
+	dev->queue_count    = 0;
+	dev->queue_reserved = 0;
+	dev->queue_slots    = 0;
+	dev->queuelist	    = NULL;
+	dev->irq	    = 0;
+	dev->context_flag   = 0;
+	dev->interrupt_flag = 0;
+	dev->dma_flag	    = 0;
+	dev->last_context   = 0;
+	dev->last_switch    = 0;
+	dev->last_checked   = 0;
+	callout_init(&dev->timer);
+	dev->context_wait   = 0;
+
+	timespecclear(&dev->ctx_start);
+	timespecclear(&dev->lck_start);
+	
+	dev->buf_rp	  = dev->buf;
+	dev->buf_wp	  = dev->buf;
+	dev->buf_end	  = dev->buf + DRM_BSZ;
+	bzero(&dev->buf_sel, sizeof dev->buf_sel);
+	dev->buf_sigio	  = NULL;
+	dev->buf_readers  = 0;
+	dev->buf_writers  = 0;
+	dev->buf_selecting = 0;
+			
+	DRM_DEBUG("\n");
+			
+	/* The kernel's context could be created here, but is now created
+	   in drm_dma_enqueue.	This is more resource-efficient for
+	   hardware that does not do DMA, but may mean that
+	   drm_select_queue fails between the time the interrupt is
+	   initialized and the time the queues are initialized. */
+			
+	return 0;
+}
+
+
+static int mga_takedown(drm_device_t *dev)
+{
+	int		  i;
+	drm_magic_entry_t *pt, *next;
+	drm_map_t	  *map;
+	drm_vma_entry_t	  *vma, *vma_next;
+
+	DRM_DEBUG("\n");
+
+	if (dev->irq) mga_irq_uninstall(dev);
+	
+	lockmgr(&dev->dev_lock, LK_EXCLUSIVE, 0, curproc);
+	callout_stop(&dev->timer);
+	
+	if (dev->devname) {
+		drm_free(dev->devname, strlen(dev->devname)+1, DRM_MEM_DRIVER);
+		dev->devname = NULL;
+	}
+	
+	if (dev->unique) {
+		drm_free(dev->unique, strlen(dev->unique)+1, DRM_MEM_DRIVER);
+		dev->unique = NULL;
+		dev->unique_len = 0;
+	}
+				/* Clear pid list */
+	for (i = 0; i < DRM_HASH_SIZE; i++) {
+		for (pt = dev->magiclist[i].head; pt; pt = next) {
+			next = pt->next;
+			drm_free(pt, sizeof(*pt), DRM_MEM_MAGIC);
+		}
+		dev->magiclist[i].head = dev->magiclist[i].tail = NULL;
+	}
+   				/* Clear AGP information */
+	if (dev->agp) {
+		drm_agp_mem_t *entry;
+		drm_agp_mem_t *nexte;
+		
+				/* Remove AGP resources, but leave dev->agp
+                                   intact until cleanup is called. */
+		for (entry = dev->agp->memory; entry; entry = nexte) {
+			nexte = entry->next;
+			if (entry->bound) drm_unbind_agp(entry->handle);
+			drm_free_agp(entry->handle, entry->pages);
+			drm_free(entry, sizeof(*entry), DRM_MEM_AGPLISTS);
+		}
+		dev->agp->memory = NULL;
+		
+		if (dev->agp->acquired)
+			agp_release(dev->agp->agpdev);
+		
+		dev->agp->acquired = 0;
+		dev->agp->enabled  = 0;
+	}
+				/* Clear vma list (only built for debugging) */
+	if (dev->vmalist) {
+		for (vma = dev->vmalist; vma; vma = vma_next) {
+			vma_next = vma->next;
+			drm_free(vma, sizeof(*vma), DRM_MEM_VMAS);
+		}
+		dev->vmalist = NULL;
+	}
+	
+				/* Clear map area and mtrr information */
+	if (dev->maplist) {
+		for (i = 0; i < dev->map_count; i++) {
+			map = dev->maplist[i];
+			switch (map->type) {
+			case _DRM_REGISTERS:
+			case _DRM_FRAME_BUFFER:
+#ifdef CONFIG_MTRR
+				if (map->mtrr >= 0) {
+					int retcode;
+					retcode = mtrr_del(map->mtrr,
+							   map->offset,
+							   map->size);
+					DRM_DEBUG("mtrr_del = %d\n", retcode);
+				}
+#endif
+				drm_ioremapfree(map->handle, map->size);
+				break;
+			case _DRM_SHM:
+				drm_free_pages((unsigned long)map->handle,
+					       drm_order(map->size)
+					       - PAGE_SHIFT,
+					       DRM_MEM_SAREA);
+				break;
+			case _DRM_AGP:
+				break;
+			}
+			drm_free(map, sizeof(*map), DRM_MEM_MAPS);
+		}
+		drm_free(dev->maplist,
+			 dev->map_count * sizeof(*dev->maplist),
+			 DRM_MEM_MAPS);
+		dev->maplist   = NULL;
+		dev->map_count = 0;
+	}
+	
+	if (dev->queuelist) {
+		for (i = 0; i < dev->queue_count; i++) {
+			drm_waitlist_destroy(&dev->queuelist[i]->waitlist);
+			if (dev->queuelist[i]) {
+				drm_free(dev->queuelist[i],
+					 sizeof(*dev->queuelist[0]),
+					 DRM_MEM_QUEUES);
+				dev->queuelist[i] = NULL;
+			}
+		}
+		drm_free(dev->queuelist,
+			 dev->queue_slots * sizeof(*dev->queuelist),
+			 DRM_MEM_QUEUES);
+		dev->queuelist	 = NULL;
+	}
+
+	drm_dma_takedown(dev);
+
+	dev->queue_count     = 0;
+	if (dev->lock.hw_lock) {
+		dev->lock.hw_lock    = NULL; /* SHM removed */
+		dev->lock.pid	     = 0;
+		wakeup(&dev->lock.lock_queue);
+	}
+	lockmgr(&dev->dev_lock, LK_RELEASE, 0, curproc);
+	
+	return 0;
+}
+
+/* mga_init is called via mga_attach at module load time, */
+
+int
+mga_init(device_t nbdev)
+{
+	int		      retcode;
+	drm_device_t	      *dev = device_get_softc(nbdev);
+
+	DRM_DEBUG("\n");
+
+	memset((void *)dev, 0, sizeof(*dev));
+	simple_lock_init(&dev->count_lock);
+	lockinit(&dev->dev_lock, PZERO, "drmlk", 0, 0);
+	
+#if 0
+	drm_parse_options(mga);
+#endif
+	dev->device = nbdev;
+	dev->devnode = make_dev(&mga_cdevsw,
+				device_get_unit(nbdev),
+				DRM_DEV_UID,
+				DRM_DEV_GID,
+				DRM_DEV_MODE,
+				MGA_NAME);
+	dev->name   = MGA_NAME;
+
+   	DRM_DEBUG("doing mem init\n");
+	drm_mem_init();
+	DRM_DEBUG("doing proc init\n");
+	drm_sysctl_init(dev);
+	TAILQ_INIT(&dev->files);
+	DRM_DEBUG("doing agp init\n");
+	dev->agp    = drm_agp_init();
+      	if(dev->agp == NULL) {
+	   	DRM_INFO("The mga drm module requires the agp module"
+			 " to function correctly\nPlease load the agp"
+			 " module before you load the mga module\n");
+	   	drm_sysctl_cleanup(dev);
+	   	mga_takedown(dev);
+	   	return ENOMEM;
+	}
+#if 0
+   	dev->agp->agp_mtrr = mtrr_add(dev->agp->agp_info.aper_base,
+				      dev->agp->agp_info.aper_size * 1024 * 1024,
+				      MTRR_TYPE_WRCOMB,
+				      1);
+#endif
+	DRM_DEBUG("doing ctxbitmap init\n");
+	if((retcode = drm_ctxbitmap_init(dev))) {
+		DRM_ERROR("Cannot allocate memory for context bitmap.\n");
+		drm_sysctl_cleanup(dev);
+		mga_takedown(dev);
+		return retcode;
+	}
+
+	DRM_INFO("Initialized %s %d.%d.%d %s on minor %d\n",
+		 MGA_NAME,
+		 MGA_MAJOR,
+		 MGA_MINOR,
+		 MGA_PATCHLEVEL,
+		 MGA_DATE,
+		 device_get_unit(nbdev));
+
+	return 0;
+}
+
+/* mga_cleanup is called via cleanup_module at module unload time. */
+
+void mga_cleanup(device_t nbdev)
+{
+	drm_device_t	      *dev = device_get_softc(nbdev);
+
+	DRM_DEBUG("\n");
+	
+	drm_sysctl_cleanup(dev);
+	destroy_dev(dev->devnode);
+
+	DRM_INFO("Module unloaded\n");
+	drm_ctxbitmap_cleanup(dev);
+	mga_dma_cleanup(dev);
+#if 0
+   	if(dev->agp && dev->agp->agp_mtrr) {
+	   	int retval;
+	   	retval = mtrr_del(dev->agp->agp_mtrr, 
+				  dev->agp->agp_info.aper_base,
+				  dev->agp->agp_info.aper_size * 1024*1024);
+	   	DRM_DEBUG("mtrr_del = %d\n", retval);
+	}
+#endif
+
+	mga_takedown(dev);
+	if (dev->agp) {
+		drm_free(dev->agp, sizeof(*dev->agp), DRM_MEM_AGPLISTS);
+		dev->agp = NULL;
+	}
+}
+
+int
+mga_version(dev_t kdev, u_long cmd, caddr_t data, int flags, struct proc *p)
+{
+	drm_version_t version;
+	int	      len;
+
+	version = *(drm_version_t *) data;
+
+#define DRM_COPY(name,value)				\
+	len = strlen(value);				\
+	if (len > name##_len) len = name##_len;		\
+	name##_len = strlen(value);			\
+	if (len && name) {				\
+		int error = copyout(value, name, len);	\
+		if (error) return error;		\
+	}
+
+	version.version_major	   = MGA_MAJOR;
+	version.version_minor	   = MGA_MINOR;
+	version.version_patchlevel = MGA_PATCHLEVEL;
+
+	DRM_COPY(version.name, MGA_NAME);
+	DRM_COPY(version.date, MGA_DATE);
+	DRM_COPY(version.desc, MGA_DESC);
+
+	*(drm_version_t *) data = version;
+	return 0;
+}
+
+int
+mga_open(dev_t kdev, int flags, int fmt, struct proc *p)
+{
+	drm_device_t  *dev    = MGA_SOFTC(minor(kdev));
+	int	      retcode = 0;
+	
+	DRM_DEBUG("open_count = %d\n", dev->open_count);
+
+	device_busy(dev->device);
+	if (!(retcode = drm_open_helper(kdev, flags, fmt, p, dev))) {
+		atomic_inc(&dev->total_open);
+		simple_lock(&dev->count_lock);
+		if (!dev->open_count++) {
+			simple_unlock(&dev->count_lock);
+			retcode = mga_setup(dev);
+		}
+		simple_unlock(&dev->count_lock);
+	}
+	device_unbusy(dev->device);
+
+	return retcode;
+}
+
+int
+mga_close(dev_t kdev, int flags, int fmt, struct proc *p)
+{
+	drm_device_t  *dev    = kdev->si_drv1;
+	drm_file_t    *priv;
+	int	      retcode = 0;
+
+	DRM_DEBUG("pid = %d, open_count = %d\n",
+		  p->p_pid, dev->open_count);
+
+	priv = drm_find_file_by_proc(dev, p);
+	if (!priv) {
+		DRM_DEBUG("can't find authenticator\n");
+		return EINVAL;
+	}
+
+	if (dev->lock.hw_lock && _DRM_LOCK_IS_HELD(dev->lock.hw_lock->lock)
+	    && dev->lock.pid == p->p_pid) {
+	      	mga_reclaim_buffers(dev, priv->pid);
+		DRM_ERROR("Process %d dead, freeing lock for context %d\n",
+			  p->p_pid,
+			  _DRM_LOCKING_CONTEXT(dev->lock.hw_lock->lock));
+		drm_lock_free(dev,
+			      &dev->lock.hw_lock->lock,
+			      _DRM_LOCKING_CONTEXT(dev->lock.hw_lock->lock));
+		
+				/* FIXME: may require heavy-handed reset of
+                                   hardware at this point, possibly
+                                   processed via a callback to the X
+                                   server. */
+	} else if (dev->lock.hw_lock) {
+	   	/* The lock is required to reclaim buffers */
+		for (;;) {
+			if (!dev->lock.hw_lock) {
+				/* Device has been unregistered */
+				retcode = EINTR;
+				break;
+			}
+			if (drm_lock_take(&dev->lock.hw_lock->lock,
+					  DRM_KERNEL_CONTEXT)) {
+				dev->lock.pid	    = p->p_pid;
+				dev->lock.lock_time = ticks;
+				atomic_inc(&dev->total_locks);
+				break;	/* Got lock */
+			}			
+				/* Contention */
+			atomic_inc(&dev->total_sleeps);
+			retcode = tsleep(&dev->lock.lock_queue,
+					 PZERO|PCATCH,
+					 "drmlk2",
+					 0);
+			if (retcode)
+				break;
+		}
+	   	if(!retcode) {
+		   	mga_reclaim_buffers(dev, priv->pid);
+		   	drm_lock_free(dev, &dev->lock.hw_lock->lock,
+				      DRM_KERNEL_CONTEXT);
+		}
+	}
+	funsetown(dev->buf_sigio);
+
+	lockmgr(&dev->dev_lock, LK_EXCLUSIVE, 0, p);
+	priv = drm_find_file_by_proc(dev, p);
+	if (priv) {
+		priv->refs--;
+		if (!priv->refs) {
+			TAILQ_REMOVE(&dev->files, priv, link);
+			drm_free(priv, sizeof(*priv), DRM_MEM_FILES);
+		}
+	}
+	lockmgr(&dev->dev_lock, LK_RELEASE, 0, p);
+
+   	atomic_inc(&dev->total_close);
+   	simple_lock(&dev->count_lock);
+   	if (!--dev->open_count) {
+	   	if (atomic_read(&dev->ioctl_count) || dev->blocked) {
+		   	DRM_ERROR("Device busy: %d %d\n",
+				  atomic_read(&dev->ioctl_count),
+				  dev->blocked);
+		   	simple_unlock(&dev->count_lock);
+		   	return EBUSY;
+		}
+	   	simple_unlock(&dev->count_lock);
+		device_unbusy(dev->device);
+	   	return mga_takedown(dev);
+	}
+   	simple_unlock(&dev->count_lock);
+	return retcode;
+}
+
+
+/* mga_ioctl is called whenever a process performs an ioctl on /dev/drm. */
+
+int
+mga_ioctl(dev_t kdev, u_long cmd, caddr_t data, int flags, struct proc *p)
+{
+	int		 nr	 = DRM_IOCTL_NR(cmd);
+	drm_device_t	 *dev	 = kdev->si_drv1;
+	drm_file_t	 *priv;
+	int		 retcode = 0;
+	drm_ioctl_desc_t *ioctl;
+	d_ioctl_t	 *func;
+
+	DRM_DEBUG("dev=%p\n", dev);
+	priv = drm_find_file_by_proc(dev, p);
+	if (!priv) {
+		DRM_DEBUG("can't find authenticator\n");
+		return EINVAL;
+	}
+
+	atomic_inc(&dev->ioctl_count);
+	atomic_inc(&dev->total_ioctl);
+	++priv->ioctl_count;
+	
+	DRM_DEBUG("pid = %d, cmd = 0x%02lx, nr = 0x%02x, auth = %d\n",
+		  p->p_pid, cmd, nr, priv->authenticated);
+
+	switch (cmd) {
+	case FIONBIO:
+		atomic_dec(&dev->ioctl_count);
+		return 0;
+
+	case FIOASYNC:
+		atomic_dec(&dev->ioctl_count);
+		dev->flags |= FASYNC;
+		return 0;
+
+	case FIOSETOWN:
+		atomic_dec(&dev->ioctl_count);
+		return fsetown(*(int *)data, &dev->buf_sigio);
+
+	case FIOGETOWN:
+		atomic_dec(&dev->ioctl_count);
+		*(int *) data = fgetown(dev->buf_sigio);
+		return 0;
+	}
+
+	if (nr >= MGA_IOCTL_COUNT) {
+		retcode = EINVAL;
+	} else {
+		ioctl	  = &mga_ioctls[nr];
+		func	  = ioctl->func;
+
+		if (!func) {
+			DRM_DEBUG("no function\n");
+			retcode = EINVAL;
+		} else if ((ioctl->root_only && suser(p))
+			    || (ioctl->auth_needed && !priv->authenticated)) {
+			retcode = EACCES;
+		} else {
+			retcode = (func)(kdev, cmd, data, flags, p);
+		}
+	}
+	
+	atomic_dec(&dev->ioctl_count);
+	return retcode;
+}
+
+int
+mga_unlock(dev_t kdev, u_long cmd, caddr_t data, int flags, struct proc *p)
+{
+        drm_device_t      *dev    = kdev->si_drv1;
+	drm_lock_t	  lock;
+	int		  s;
+
+	lock = *(drm_lock_t *) data;
+	
+	if (lock.context == DRM_KERNEL_CONTEXT) {
+		DRM_ERROR("Process %d using kernel context %d\n",
+			  p->p_pid, lock.context);
+		return EINVAL;
+	}
+
+	DRM_DEBUG("%d frees lock (%d holds)\n",
+		  lock.context,
+		  _DRM_LOCKING_CONTEXT(dev->lock.hw_lock->lock));
+	atomic_inc(&dev->total_unlocks);
+	if (_DRM_LOCK_IS_CONT(dev->lock.hw_lock->lock))
+		atomic_inc(&dev->total_contends);
+	drm_lock_transfer(dev, &dev->lock.hw_lock->lock, DRM_KERNEL_CONTEXT);
+
+	s = splsofttq();
+	mga_dma_schedule(dev, 1);
+	splx(s);
+
+	if (drm_lock_free(dev, &dev->lock.hw_lock->lock,
+			  DRM_KERNEL_CONTEXT)) {
+	   DRM_ERROR("\n");
+	}
+
+	return 0;
+}