1 files changed, 452 insertions, 49 deletions

diff --git a/sys/dev/drm2/drm_fops.c b/sys/dev/drm2/drm_fops.c
index 2685ff7b2779..b73cec63d3b7 100644
--- a/sys/dev/drm2/drm_fops.c
+++ b/sys/dev/drm2/drm_fops.c
@@ -1,4 +1,15 @@
-/*-
+/**
+ * \file drm_fops.c
+ * File operations for DRM
+ *
+ * \author Rickard E. (Rik) Faith <faith@valinux.com>
+ * \author Daryll Strauss <daryll@valinux.com>
+ * \author Gareth Hughes <gareth@valinux.com>
+ */
+
+/*
+ * Created: Mon Jan  4 08:58:31 1999 by faith@valinux.com
+ *
  * Copyright 1999 Precision Insight, Inc., Cedar Park, Texas.
  * Copyright 2000 VA Linux Systems, Inc., Sunnyvale, California.
  * All Rights Reserved.
@@ -21,51 +32,177 @@
  * 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>
- *    Daryll Strauss <daryll@valinux.com>
- *    Gareth Hughes <gareth@valinux.com>
- *
  */
 
 #include <sys/cdefs.h>
 __FBSDID("$FreeBSD$");
 
-/** @file drm_fops.c
- * Support code for dealing with the file privates associated with each
- * open of the DRM device.
+#include <dev/drm2/drmP.h>
+
+static int drm_open_helper(struct cdev *kdev, int flags, int fmt,
+			   DRM_STRUCTPROC *p, struct drm_device *dev);
+
+static int drm_setup(struct drm_device * dev)
+{
+	int i;
+	int ret;
+
+	if (dev->driver->firstopen) {
+		ret = dev->driver->firstopen(dev);
+		if (ret != 0)
+			return ret;
+	}
+
+	atomic_set(&dev->ioctl_count, 0);
+	atomic_set(&dev->vma_count, 0);
+
+	if (drm_core_check_feature(dev, DRIVER_HAVE_DMA) &&
+	    !drm_core_check_feature(dev, DRIVER_MODESET)) {
+		dev->buf_use = 0;
+		atomic_set(&dev->buf_alloc, 0);
+
+		i = drm_dma_setup(dev);
+		if (i < 0)
+			return i;
+	}
+
+	/*
+	 * FIXME Linux<->FreeBSD: counter incremented in drm_open() and
+	 * reset to 0 here.
+	 */
+#if 0
+	for (i = 0; i < ARRAY_SIZE(dev->counts); i++)
+		atomic_set(&dev->counts[i], 0);
+#endif
+
+	dev->sigdata.lock = NULL;
+
+	dev->context_flag = 0;
+	dev->interrupt_flag = 0;
+	dev->dma_flag = 0;
+	dev->last_context = 0;
+	dev->last_switch = 0;
+	dev->last_checked = 0;
+	DRM_INIT_WAITQUEUE(&dev->context_wait);
+	dev->if_version = 0;
+
+#ifdef FREEBSD_NOTYET
+	dev->ctx_start = 0;
+	dev->lck_start = 0;
+
+	dev->buf_async = NULL;
+	DRM_INIT_WAITQUEUE(&dev->buf_readers);
+	DRM_INIT_WAITQUEUE(&dev->buf_writers);
+#endif /* FREEBSD_NOTYET */
+
+	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;
+}
+
+/**
+ * Open file.
+ *
+ * \param inode device inode
+ * \param filp file pointer.
+ * \return zero on success or a negative number on failure.
+ *
+ * Searches the DRM device with the same minor number, calls open_helper(), and
+ * increments the device open count. If the open count was previous at zero,
+ * i.e., it's the first that the device is open, then calls setup().
  */
+int drm_open(struct cdev *kdev, int flags, int fmt, DRM_STRUCTPROC *p)
+{
+	struct drm_device *dev = NULL;
+	struct drm_minor *minor;
+	int retcode = 0;
+	int need_setup = 0;
 
-#include <dev/drm2/drmP.h>
+	minor = kdev->si_drv1;
+	if (!minor)
+		return ENODEV;
+
+	if (!(dev = minor->dev))
+		return ENODEV;
+
+	sx_xlock(&drm_global_mutex);
 
-/* drm_open_helper is called whenever a process opens /dev/drm. */
-int drm_open_helper(struct cdev *kdev, int flags, int fmt, DRM_STRUCTPROC *p,
-		    struct drm_device *dev)
+	/*
+	 * FIXME Linux<->FreeBSD: On Linux, counter updated outisde
+	 * global mutex.
+	 */
+	if (!dev->open_count++)
+		need_setup = 1;
+
+	retcode = drm_open_helper(kdev, flags, fmt, p, dev);
+	if (retcode) {
+		sx_xunlock(&drm_global_mutex);
+		return (-retcode);
+	}
+	atomic_inc(&dev->counts[_DRM_STAT_OPENS]);
+	if (need_setup) {
+		retcode = drm_setup(dev);
+		if (retcode)
+			goto err_undo;
+	}
+	sx_xunlock(&drm_global_mutex);
+	return 0;
+
+err_undo:
+	mtx_lock(&Giant); /* FIXME: Giant required? */
+	device_unbusy(dev->dev);
+	mtx_unlock(&Giant);
+	dev->open_count--;
+	sx_xunlock(&drm_global_mutex);
+	return -retcode;
+}
+EXPORT_SYMBOL(drm_open);
+
+/**
+ * Called whenever a process opens /dev/drm.
+ *
+ * \param inode device inode.
+ * \param filp file pointer.
+ * \param dev device.
+ * \return zero on success or a negative number on failure.
+ *
+ * Creates and initializes a drm_file structure for the file private data in \p
+ * filp and add it into the double linked list in \p dev.
+ */
+static int drm_open_helper(struct cdev *kdev, int flags, int fmt,
+			   DRM_STRUCTPROC *p, struct drm_device *dev)
 {
 	struct drm_file *priv;
-	int retcode;
+	int ret;
 
 	if (flags & O_EXCL)
-		return EBUSY; /* No exclusive opens */
-	dev->flags = flags;
+		return -EBUSY;	/* No exclusive opens */
+	if (dev->switch_power_state != DRM_SWITCH_POWER_ON)
+		return -EINVAL;
 
 	DRM_DEBUG("pid = %d, device = %s\n", DRM_CURRENTPID, devtoname(kdev));
 
 	priv = malloc(sizeof(*priv), DRM_MEM_FILES, M_NOWAIT | M_ZERO);
-	if (priv == NULL) {
-		return ENOMEM;
-	}
-
-	DRM_LOCK(dev);
-	priv->dev		= dev;
-	priv->uid		= p->td_ucred->cr_svuid;
-	priv->pid		= p->td_proc->p_pid;
-	priv->ioctl_count 	= 0;
+	if (!priv)
+		return -ENOMEM;
 
+	priv->uid = p->td_ucred->cr_svuid;
+	priv->pid = p->td_proc->p_pid;
+	priv->minor = kdev->si_drv1;
+	priv->ioctl_count = 0;
 	/* for compatibility root is always authenticated */
-	priv->authenticated	= DRM_SUSER(p);
+	priv->authenticated = DRM_SUSER(p);
+	priv->lock_count = 0;
 
+	INIT_LIST_HEAD(&priv->lhead);
 	INIT_LIST_HEAD(&priv->fbs);
 	INIT_LIST_HEAD(&priv->event_list);
 	priv->event_space = 4096; /* set aside 4k for event buffer */
@@ -73,47 +210,289 @@ int drm_open_helper(struct cdev *kdev, int flags, int fmt, DRM_STRUCTPROC *p,
 	if (dev->driver->driver_features & DRIVER_GEM)
 		drm_gem_open(dev, priv);
 
+#ifdef FREEBSD_NOTYET
+	if (drm_core_check_feature(dev, DRIVER_PRIME))
+		drm_prime_init_file_private(&priv->prime);
+#endif /* FREEBSD_NOTYET */
+
 	if (dev->driver->open) {
-		/* shared code returns -errno */
-		retcode = -dev->driver->open(dev, priv);
-		if (retcode != 0) {
-			free(priv, DRM_MEM_FILES);
+		ret = dev->driver->open(dev, priv);
+		if (ret < 0)
+			goto out_free;
+	}
+
+
+	/* if there is no current master make this fd it */
+	DRM_LOCK(dev);
+	if (!priv->minor->master) {
+		/* create a new master */
+		priv->minor->master = drm_master_create(priv->minor);
+		if (!priv->minor->master) {
 			DRM_UNLOCK(dev);
-			return retcode;
+			ret = -ENOMEM;
+			goto out_free;
+		}
+
+		priv->is_master = 1;
+		/* take another reference for the copy in the local file priv */
+		priv->master = drm_master_get(priv->minor->master);
+
+		priv->authenticated = 1;
+
+		DRM_UNLOCK(dev);
+		if (dev->driver->master_create) {
+			ret = dev->driver->master_create(dev, priv->master);
+			if (ret) {
+				DRM_LOCK(dev);
+				/* drop both references if this fails */
+				drm_master_put(&priv->minor->master);
+				drm_master_put(&priv->master);
+				DRM_UNLOCK(dev);
+				goto out_free;
+			}
+		}
+		DRM_LOCK(dev);
+		if (dev->driver->master_set) {
+			ret = dev->driver->master_set(dev, priv, true);
+			if (ret) {
+				/* drop both references if this fails */
+				drm_master_put(&priv->minor->master);
+				drm_master_put(&priv->master);
+				DRM_UNLOCK(dev);
+				goto out_free;
+			}
+		}
+		DRM_UNLOCK(dev);
+	} else {
+		/* get a reference to the master */
+		priv->master = drm_master_get(priv->minor->master);
+		DRM_UNLOCK(dev);
+	}
+
+	DRM_LOCK(dev);
+	list_add(&priv->lhead, &dev->filelist);
+	DRM_UNLOCK(dev);
+
+	mtx_lock(&Giant); /* FIXME: Giant required? */
+	device_busy(dev->dev);
+	mtx_unlock(&Giant);
+
+	ret = devfs_set_cdevpriv(priv, drm_release);
+	if (ret != 0)
+		drm_release(priv);
+
+	return ret;
+      out_free:
+	free(priv, DRM_MEM_FILES);
+	return ret;
+}
+
+static void drm_master_release(struct drm_device *dev, struct drm_file *file_priv)
+{
+
+	if (drm_i_have_hw_lock(dev, file_priv)) {
+		DRM_DEBUG("File %p released, freeing lock for context %d\n",
+			  file_priv, _DRM_LOCKING_CONTEXT(file_priv->master->lock.hw_lock->lock));
+		drm_lock_free(&file_priv->master->lock,
+			      _DRM_LOCKING_CONTEXT(file_priv->master->lock.hw_lock->lock));
+	}
+}
+
+static void drm_events_release(struct drm_file *file_priv)
+{
+	struct drm_device *dev = file_priv->minor->dev;
+	struct drm_pending_event *e, *et;
+	struct drm_pending_vblank_event *v, *vt;
+	unsigned long flags;
+
+	DRM_SPINLOCK_IRQSAVE(&dev->event_lock, flags);
+
+	/* Remove pending flips */
+	list_for_each_entry_safe(v, vt, &dev->vblank_event_list, base.link)
+		if (v->base.file_priv == file_priv) {
+			list_del(&v->base.link);
+			drm_vblank_put(dev, v->pipe);
+			v->base.destroy(&v->base);
+		}
+
+	/* Remove unconsumed events */
+	list_for_each_entry_safe(e, et, &file_priv->event_list, link)
+		e->destroy(e);
+
+	DRM_SPINUNLOCK_IRQRESTORE(&dev->event_lock, flags);
+}
+
+/**
+ * Release file.
+ *
+ * \param inode device inode
+ * \param file_priv DRM file private.
+ * \return zero on success or a negative number on failure.
+ *
+ * If the hardware lock is held then free it, and take it again for the kernel
+ * context since it's necessary to reclaim buffers. Unlink the file private
+ * data from its list and free it. Decreases the open count and if it reaches
+ * zero calls drm_lastclose().
+ */
+void drm_release(void *data)
+{
+	struct drm_file *file_priv = data;
+	struct drm_device *dev = file_priv->minor->dev;
+
+	sx_xlock(&drm_global_mutex);
+
+	DRM_DEBUG("open_count = %d\n", dev->open_count);
+
+	if (dev->driver->preclose)
+		dev->driver->preclose(dev, file_priv);
+
+	/* ========================================================
+	 * Begin inline drm_release
+	 */
+
+	DRM_DEBUG("pid = %d, device = 0x%lx, open_count = %d\n",
+		  DRM_CURRENTPID,
+		  (long)file_priv->minor->device,
+		  dev->open_count);
+
+	/* Release any auth tokens that might point to this file_priv,
+	   (do that under the drm_global_mutex) */
+	if (file_priv->magic)
+		(void) drm_remove_magic(file_priv->master, file_priv->magic);
+
+	/* if the master has gone away we can't do anything with the lock */
+	if (file_priv->minor->master)
+		drm_master_release(dev, file_priv);
+
+	if (drm_core_check_feature(dev, DRIVER_HAVE_DMA))
+		drm_core_reclaim_buffers(dev, file_priv);
+
+	drm_events_release(file_priv);
+
+	seldrain(&file_priv->event_poll);
+
+	if (dev->driver->driver_features & DRIVER_MODESET)
+		drm_fb_release(file_priv);
+
+	if (dev->driver->driver_features & DRIVER_GEM)
+		drm_gem_release(dev, file_priv);
+
+#ifdef FREEBSD_NOTYET
+	mutex_lock(&dev->ctxlist_mutex);
+	if (!list_empty(&dev->ctxlist)) {
+		struct drm_ctx_list *pos, *n;
+
+		list_for_each_entry_safe(pos, n, &dev->ctxlist, head) {
+			if (pos->tag == file_priv &&
+			    pos->handle != DRM_KERNEL_CONTEXT) {
+				if (dev->driver->context_dtor)
+					dev->driver->context_dtor(dev,
+								  pos->handle);
+
+				drm_ctxbitmap_free(dev, pos->handle);
+
+				list_del(&pos->head);
+				kfree(pos);
+				--dev->ctx_count;
+			}
 		}
 	}
+	mutex_unlock(&dev->ctxlist_mutex);
+#endif /* FREEBSD_NOTYET */
+
+	DRM_LOCK(dev);
+
+	if (file_priv->is_master) {
+		struct drm_master *master = file_priv->master;
+		struct drm_file *temp;
+		list_for_each_entry(temp, &dev->filelist, lhead) {
+			if ((temp->master == file_priv->master) &&
+			    (temp != file_priv))
+				temp->authenticated = 0;
+		}
+
+		/**
+		 * Since the master is disappearing, so is the
+		 * possibility to lock.
+		 */
 
-	/* first opener automatically becomes master */
-	priv->master = TAILQ_EMPTY(&dev->files);
+		if (master->lock.hw_lock) {
+			if (dev->sigdata.lock == master->lock.hw_lock)
+				dev->sigdata.lock = NULL;
+			master->lock.hw_lock = NULL;
+			master->lock.file_priv = NULL;
+			DRM_WAKEUP_INT(&master->lock.lock_queue);
+		}
+
+		if (file_priv->minor->master == file_priv->master) {
+			/* drop the reference held my the minor */
+			if (dev->driver->master_drop)
+				dev->driver->master_drop(dev, file_priv, true);
+			drm_master_put(&file_priv->minor->master);
+		}
+	}
 
-	TAILQ_INSERT_TAIL(&dev->files, priv, link);
+	/* drop the reference held my the file priv */
+	drm_master_put(&file_priv->master);
+	file_priv->is_master = 0;
+	list_del(&file_priv->lhead);
 	DRM_UNLOCK(dev);
-	kdev->si_drv1 = dev;
 
-	retcode = devfs_set_cdevpriv(priv, drm_close);
-	if (retcode != 0)
-		drm_close(priv);
+	if (dev->driver->postclose)
+		dev->driver->postclose(dev, file_priv);
 
-	return (retcode);
+#ifdef FREEBSD_NOTYET
+	if (drm_core_check_feature(dev, DRIVER_PRIME))
+		drm_prime_destroy_file_private(&file_priv->prime);
+#endif /* FREEBSD_NOTYET */
+
+	free(file_priv, DRM_MEM_FILES);
+
+	/* ========================================================
+	 * End inline drm_release
+	 */
+
+	atomic_inc(&dev->counts[_DRM_STAT_CLOSES]);
+	mtx_lock(&Giant);
+	device_unbusy(dev->dev);
+	mtx_unlock(&Giant);
+	if (!--dev->open_count) {
+		if (atomic_read(&dev->ioctl_count)) {
+			DRM_ERROR("Device busy: %d\n",
+				  atomic_read(&dev->ioctl_count));
+		} else
+			drm_lastclose(dev);
+	}
+	sx_xunlock(&drm_global_mutex);
 }
+EXPORT_SYMBOL(drm_release);
 
 static bool
-drm_dequeue_event(struct drm_device *dev, struct drm_file *file_priv,
-    struct uio *uio, struct drm_pending_event **out)
+drm_dequeue_event(struct drm_file *file_priv, struct uio *uio,
+    struct drm_pending_event **out)
 {
 	struct drm_pending_event *e;
+	bool ret = false;
 
+	/* Already locked in drm_read(). */
+	/* DRM_SPINLOCK_IRQSAVE(&dev->event_lock, flags); */
+
+	*out = NULL;
 	if (list_empty(&file_priv->event_list))
-		return (false);
+		goto out;
 	e = list_first_entry(&file_priv->event_list,
-	    struct drm_pending_event, link);
+			     struct drm_pending_event, link);
 	if (e->event->length > uio->uio_resid)
-		return (false);
+		goto out;
 
 	file_priv->event_space += e->event->length;
 	list_del(&e->link);
 	*out = e;
-	return (true);
+	ret = true;
+
+out:
+	/* DRM_SPINUNLOCK_IRQRESTORE(&dev->event_lock, flags); */
+	return ret;
 }
 
 int
@@ -122,13 +501,14 @@ drm_read(struct cdev *kdev, struct uio *uio, int ioflag)
 	struct drm_file *file_priv;
 	struct drm_device *dev;
 	struct drm_pending_event *e;
-	int error;
+	ssize_t error;
 
 	error = devfs_get_cdevpriv((void **)&file_priv);
 	if (error != 0) {
 		DRM_ERROR("can't find authenticator\n");
 		return (EINVAL);
 	}
+
 	dev = drm_get_device_from_kdev(kdev);
 	mtx_lock(&dev->event_lock);
 	while (list_empty(&file_priv->event_list)) {
@@ -141,20 +521,24 @@ drm_read(struct cdev *kdev, struct uio *uio, int ioflag)
 	       if (error != 0)
 		       goto out;
 	}
-	while (drm_dequeue_event(dev, file_priv, uio, &e)) {
+
+	while (drm_dequeue_event(file_priv, uio, &e)) {
 		mtx_unlock(&dev->event_lock);
 		error = uiomove(e->event, e->event->length, uio);
 		CTR3(KTR_DRM, "drm_event_dequeued %d %d %d", curproc->p_pid,
 		    e->event->type, e->event->length);
+
 		e->destroy(e);
 		if (error != 0)
 			return (error);
 		mtx_lock(&dev->event_lock);
 	}
+
 out:
 	mtx_unlock(&dev->event_lock);
 	return (error);
 }
+EXPORT_SYMBOL(drm_read);
 
 void
 drm_event_wakeup(struct drm_pending_event *e)
@@ -163,7 +547,7 @@ drm_event_wakeup(struct drm_pending_event *e)
 	struct drm_device *dev;
 
 	file_priv = e->file_priv;
-	dev = file_priv->dev;
+	dev = file_priv->minor->dev;
 	mtx_assert(&dev->event_lock, MA_OWNED);
 
 	wakeup(&file_priv->event_space);
@@ -182,6 +566,7 @@ drm_poll(struct cdev *kdev, int events, struct thread *td)
 		DRM_ERROR("can't find authenticator\n");
 		return (EINVAL);
 	}
+
 	dev = drm_get_device_from_kdev(kdev);
 
 	revents = 0;
@@ -198,3 +583,21 @@ drm_poll(struct cdev *kdev, int events, struct thread *td)
 	mtx_unlock(&dev->event_lock);
 	return (revents);
 }
+EXPORT_SYMBOL(drm_poll);
+
+int
+drm_mmap_single(struct cdev *kdev, vm_ooffset_t *offset, vm_size_t size,
+    struct vm_object **obj_res, int nprot)
+{
+	struct drm_device *dev;
+
+	dev = drm_get_device_from_kdev(kdev);
+	if (dev->drm_ttm_bdev != NULL) {
+		return (-ttm_bo_mmap_single(dev->drm_ttm_bdev, offset, size,
+		    obj_res, nprot));
+	} else if ((dev->driver->driver_features & DRIVER_GEM) != 0) {
+		return (-drm_gem_mmap_single(dev, offset, size, obj_res, nprot));
+	} else {
+		return (ENODEV);
+	}
+}