renesas/drm.git - libdrm, cloned from git://anongit.freedesktop.org/mesa/drm

Age	Commit message (Expand)	Author
2007-12-02	bsd: Now make secondary vblank work	Robert Noland
2007-12-01	bsd: Hook secondary vblank support.	Robert Noland
2007-12-01	bsd: Fix typo in i915_drv.c	Robert Noland
2006-10-31	Fix bug #8839 - a comment	Alan Hourihane
2006-05-17	Add the bits for vblank support on FreeBSD, which most importantly avoids	Eric Anholt
2005-12-30	Merge patch from jhb to catch up with FreeBSD-current vgapci master device	Eric Anholt
2005-12-02	Finish the last bits necessary to get the i915 DRM port working on FreeBSD	Eric Anholt
2005-11-15	Fix compiling and reenable build of i915 driver.	Eric Anholt
2005-11-11	Fix breakage from the move of driver ioctl externs to header files.	Eric Anholt
2005-08-05	Rename the driver hooks in the DRM to something a little more	Eric Anholt
2005-05-27	Modify drm_driver::device_is_agp to return a tri-state value to indicate	Ian Romanick
2005-04-16	Use /*- to begin license blocks in BSD code to reduce diffs against FreeBSD	Eric Anholt
2004-11-06	Convert more drivers for bsd-core, moving the ioctl definitions to shared	Eric Anholt
2004-08-14	Remove unused pcigart/sg header stuff from i915 driver.	Eric Anholt
2004-08-03	bring over fix from i865-agp branch, it now probes the driver, X hangs	Dave Airlie
2004-07-29	change to agp not pci ... still not working	Dave Airlie
2004-07-29	initial port of i915 to BSD, not finished doesn't work.. no idea why...	Dave Airlie

/* lock.c -- IOCTLs for locking -*- 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> */ #define __NO_VERSION__ #include "drmP.h" int DRM(block)(struct inode *inode, struct file *filp, unsigned int cmd, unsigned long arg) { DRM_DEBUG("\n"); return 0; } int DRM(unblock)(struct inode *inode, struct file *filp, unsigned int cmd, unsigned long arg) { DRM_DEBUG("\n"); return 0; } int DRM(lock_take)(__volatile__ unsigned int *lock, unsigned int context) { unsigned int old, new, prev; do { old = *lock; if (old & _DRM_LOCK_HELD) new = old | _DRM_LOCK_CONT; else new = context | _DRM_LOCK_HELD; prev = cmpxchg(lock, old, new); } while (prev != old); if (_DRM_LOCKING_CONTEXT(old) == context) { if (old & _DRM_LOCK_HELD) { if (context != DRM_KERNEL_CONTEXT) { DRM_ERROR("%d holds heavyweight lock\n", context); } return 0; } } if (new == (context | _DRM_LOCK_HELD)) { /* Have lock */ return 1; } return 0; } /* This takes a lock forcibly and hands it to context. Should ONLY be used inside *_unlock to give lock to kernel before calling *_dma_schedule. */ int DRM(lock_transfer)(drm_device_t *dev, __volatile__ unsigned int *lock, unsigned int context) { unsigned int old, new, prev; dev->lock.filp = 0; do { old = *lock; new = context | _DRM_LOCK_HELD; prev = cmpxchg(lock, old, new); } while (prev != old); return 1; } int DRM(lock_free)(drm_device_t *dev, __volatile__ unsigned int *lock, unsigned int context) { unsigned int old, new, prev; dev->lock.filp = 0; do { old = *lock; new = 0; prev = cmpxchg(lock, old, new); } while (prev != old); if (_DRM_LOCK_IS_HELD(old) && _DRM_LOCKING_CONTEXT(old) != context) { DRM_ERROR("%d freed heavyweight lock held by %d\n", context, _DRM_LOCKING_CONTEXT(old)); return 1; } wake_up_interruptible(&dev->lock.lock_queue); return 0; } static int DRM(flush_queue)(drm_device_t *dev, int context) { DECLARE_WAITQUEUE(entry, current); int ret = 0; drm_queue_t *q = dev->queuelist[context]; DRM_DEBUG("\n"); atomic_inc(&q->use_count); if (atomic_read(&q->use_count) > 1) { atomic_inc(&q->block_write); add_wait_queue(&q->flush_queue, &entry); atomic_inc(&q->block_count); for (;;) { current->state = TASK_INTERRUPTIBLE; if (!DRM_BUFCOUNT(&q->waitlist)) break; schedule(); if (signal_pending(current)) { ret = -EINTR; /* Can't restart */ break; } } atomic_dec(&q->block_count); current->state = TASK_RUNNING; remove_wait_queue(&q->flush_queue, &entry); } atomic_dec(&q->use_count); /* NOTE: block_write is still incremented! Use drm_flush_unlock_queue to decrement. */ return ret; } static int DRM(flush_unblock_queue)(drm_device_t *dev, int context) { drm_queue_t *q = dev->queuelist[context]; DRM_DEBUG("\n"); atomic_inc(&q->use_count); if (atomic_read(&q->use_count) > 1) { if (atomic_read(&q->block_write)) { atomic_dec(&q->block_write); wake_up_interruptible(&q->write_queue); } } atomic_dec(&q->use_count); return 0; } int DRM(flush_block_and_flush)(drm_device_t *dev, int context, drm_lock_flags_t flags) { int ret = 0; int i; DRM_DEBUG("\n"); if (flags & _DRM_LOCK_FLUSH) { ret = DRM(flush_queue)(dev, DRM_KERNEL_CONTEXT); if (!ret) ret = DRM(flush_queue)(dev, context); } if (flags & _DRM_LOCK_FLUSH_ALL) { for (i = 0; !ret && i < dev->queue_count; i++) { ret = DRM(flush_queue)(dev, i); } } return ret; } int DRM(flush_unblock)(drm_device_t *dev, int context, drm_lock_flags_t flags) { int ret = 0; int i; DRM_DEBUG("\n"); if (flags & _DRM_LOCK_FLUSH) { ret = DRM(flush_unblock_queue)(dev, DRM_KERNEL_CONTEXT); if (!ret) ret = DRM(flush_unblock_queue)(dev, context); } if (flags & _DRM_LOCK_FLUSH_ALL) { for (i = 0; !ret && i < dev->queue_count; i++) { ret = DRM(flush_unblock_queue)(dev, i); } } return ret; } int DRM(finish)(struct inode *inode, struct file *filp, unsigned int cmd, unsigned long arg) { drm_file_t *priv = filp->private_data; drm_device_t *dev = priv->dev; int ret = 0; drm_lock_t lock; DRM_DEBUG("\n"); if (copy_from_user(&lock, (drm_lock_t *)arg, sizeof(lock))) return -EFAULT; ret = DRM(flush_block_and_flush)(dev, lock.context, lock.flags); DRM(flush_unblock)(dev, lock.context, lock.flags); return ret; } /* If we get here, it means that the process has called DRM_IOCTL_LOCK without calling DRM_IOCTL_UNLOCK. If the lock is not held, then let the signal proceed as usual. If the lock is held, then set the contended flag and keep the signal blocked. Return 1 if the signal should be delivered normally. Return 0 if the signal should be blocked. */ int DRM(notifier)(void *priv) { drm_sigdata_t *s = (drm_sigdata_t *)priv; unsigned int old, new, prev; /* Allow signal delivery if lock isn't held */ if (!s->lock || !_DRM_LOCK_IS_HELD(s->lock->lock) || _DRM_LOCKING_CONTEXT(s->lock->lock) != s->context) return 1; /* Otherwise, set flag to force call to drmUnlock */ do { old = s->lock->lock; new = old | _DRM_LOCK_CONT; prev = cmpxchg(&s->lock->lock, old, new); } while (prev != old); return 0; }