Dave Airlie | 22f579c | 2005-06-28 22:48:56 +1000 | [diff] [blame] | 1 | /* |
| 2 | * Copyright 2005 Thomas Hellstrom. All Rights Reserved. |
| 3 | * |
| 4 | * Permission is hereby granted, free of charge, to any person obtaining a |
| 5 | * copy of this software and associated documentation files (the "Software"), |
| 6 | * to deal in the Software without restriction, including without limitation |
| 7 | * the rights to use, copy, modify, merge, publish, distribute, sub license, |
| 8 | * and/or sell copies of the Software, and to permit persons to whom the |
| 9 | * Software is furnished to do so, subject to the following conditions: |
| 10 | * |
| 11 | * The above copyright notice and this permission notice (including the |
| 12 | * next paragraph) shall be included in all copies or substantial portions |
| 13 | * of the Software. |
| 14 | * |
| 15 | * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR |
| 16 | * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, |
| 17 | * FITNESS FOR A PARTICULAR PURPOSE AND NON-INFRINGEMENT. IN NO EVENT SHALL |
| 18 | * THE AUTHOR(S), AND/OR THE COPYRIGHT HOLDER(S) BE LIABLE FOR ANY CLAIM, DAMAGES OR |
| 19 | * OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, |
| 20 | * ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER |
| 21 | * DEALINGS IN THE SOFTWARE. |
| 22 | * |
| 23 | * Author: Thomas Hellstrom 2005. |
| 24 | * |
| 25 | * Video and XvMC related functions. |
| 26 | */ |
| 27 | |
| 28 | #include "drmP.h" |
| 29 | #include "via_drm.h" |
| 30 | #include "via_drv.h" |
| 31 | |
Dave Airlie | b5e89ed | 2005-09-25 14:28:13 +1000 | [diff] [blame^] | 32 | void via_init_futex(drm_via_private_t * dev_priv) |
Dave Airlie | 22f579c | 2005-06-28 22:48:56 +1000 | [diff] [blame] | 33 | { |
| 34 | unsigned int i; |
| 35 | |
| 36 | DRM_DEBUG("%s\n", __FUNCTION__); |
| 37 | |
| 38 | for (i = 0; i < VIA_NR_XVMC_LOCKS; ++i) { |
| 39 | DRM_INIT_WAITQUEUE(&(dev_priv->decoder_queue[i])); |
| 40 | XVMCLOCKPTR(dev_priv->sarea_priv, i)->lock = 0; |
| 41 | } |
| 42 | } |
| 43 | |
Dave Airlie | b5e89ed | 2005-09-25 14:28:13 +1000 | [diff] [blame^] | 44 | void via_cleanup_futex(drm_via_private_t * dev_priv) |
Dave Airlie | 22f579c | 2005-06-28 22:48:56 +1000 | [diff] [blame] | 45 | { |
Dave Airlie | b5e89ed | 2005-09-25 14:28:13 +1000 | [diff] [blame^] | 46 | } |
Dave Airlie | 22f579c | 2005-06-28 22:48:56 +1000 | [diff] [blame] | 47 | |
Dave Airlie | b5e89ed | 2005-09-25 14:28:13 +1000 | [diff] [blame^] | 48 | void via_release_futex(drm_via_private_t * dev_priv, int context) |
Dave Airlie | 22f579c | 2005-06-28 22:48:56 +1000 | [diff] [blame] | 49 | { |
| 50 | unsigned int i; |
| 51 | volatile int *lock; |
| 52 | |
Dave Airlie | b5e89ed | 2005-09-25 14:28:13 +1000 | [diff] [blame^] | 53 | for (i = 0; i < VIA_NR_XVMC_LOCKS; ++i) { |
| 54 | lock = (int *)XVMCLOCKPTR(dev_priv->sarea_priv, i); |
| 55 | if ((_DRM_LOCKING_CONTEXT(*lock) == context)) { |
| 56 | if (_DRM_LOCK_IS_HELD(*lock) |
| 57 | && (*lock & _DRM_LOCK_CONT)) { |
| 58 | DRM_WAKEUP(&(dev_priv->decoder_queue[i])); |
Dave Airlie | 22f579c | 2005-06-28 22:48:56 +1000 | [diff] [blame] | 59 | } |
| 60 | *lock = 0; |
| 61 | } |
Dave Airlie | b5e89ed | 2005-09-25 14:28:13 +1000 | [diff] [blame^] | 62 | } |
| 63 | } |
Dave Airlie | 22f579c | 2005-06-28 22:48:56 +1000 | [diff] [blame] | 64 | |
Dave Airlie | b5e89ed | 2005-09-25 14:28:13 +1000 | [diff] [blame^] | 65 | int via_decoder_futex(DRM_IOCTL_ARGS) |
Dave Airlie | 22f579c | 2005-06-28 22:48:56 +1000 | [diff] [blame] | 66 | { |
| 67 | DRM_DEVICE; |
| 68 | drm_via_futex_t fx; |
| 69 | volatile int *lock; |
| 70 | drm_via_private_t *dev_priv = (drm_via_private_t *) dev->dev_private; |
| 71 | drm_via_sarea_t *sAPriv = dev_priv->sarea_priv; |
| 72 | int ret = 0; |
| 73 | |
| 74 | DRM_DEBUG("%s\n", __FUNCTION__); |
| 75 | |
Alexey Dobriyan | bbaf364 | 2005-07-27 11:43:56 -0700 | [diff] [blame] | 76 | DRM_COPY_FROM_USER_IOCTL(fx, (drm_via_futex_t __user *) data, |
| 77 | sizeof(fx)); |
Dave Airlie | 22f579c | 2005-06-28 22:48:56 +1000 | [diff] [blame] | 78 | |
| 79 | if (fx.lock > VIA_NR_XVMC_LOCKS) |
| 80 | return -EFAULT; |
| 81 | |
| 82 | lock = (int *)XVMCLOCKPTR(sAPriv, fx.lock); |
| 83 | |
| 84 | switch (fx.func) { |
| 85 | case VIA_FUTEX_WAIT: |
| 86 | DRM_WAIT_ON(ret, dev_priv->decoder_queue[fx.lock], |
| 87 | (fx.ms / 10) * (DRM_HZ / 100), *lock != fx.val); |
| 88 | return ret; |
| 89 | case VIA_FUTEX_WAKE: |
| 90 | DRM_WAKEUP(&(dev_priv->decoder_queue[fx.lock])); |
| 91 | return 0; |
| 92 | } |
| 93 | return 0; |
| 94 | } |