mirror of
https://github.com/AuxXxilium/linux_dsm_epyc7002.git
synced 2024-12-18 14:57:11 +07:00
130 lines
3.2 KiB
C
130 lines
3.2 KiB
C
/*
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* Copyright (C) 2013-2016 Red Hat
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* Author: Rob Clark <robdclark@gmail.com>
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*
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* This program is free software; you can redistribute it and/or modify it
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* under the terms of the GNU General Public License version 2 as published by
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* the Free Software Foundation.
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*
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* This program is distributed in the hope that it will be useful, but WITHOUT
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* ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
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* FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for
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* more details.
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*
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* You should have received a copy of the GNU General Public License along with
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* this program. If not, see <http://www.gnu.org/licenses/>.
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*/
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#include "msm_drv.h"
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#include "msm_fence.h"
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#include "msm_gpu.h"
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static inline bool fence_completed(struct drm_device *dev, uint32_t fence)
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{
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struct msm_drm_private *priv = dev->dev_private;
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return (int32_t)(priv->completed_fence - fence) >= 0;
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}
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int msm_wait_fence(struct drm_device *dev, uint32_t fence,
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ktime_t *timeout , bool interruptible)
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{
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struct msm_drm_private *priv = dev->dev_private;
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int ret;
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if (!priv->gpu)
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return 0;
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if (fence > priv->gpu->submitted_fence) {
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DRM_ERROR("waiting on invalid fence: %u (of %u)\n",
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fence, priv->gpu->submitted_fence);
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return -EINVAL;
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}
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if (!timeout) {
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/* no-wait: */
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ret = fence_completed(dev, fence) ? 0 : -EBUSY;
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} else {
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ktime_t now = ktime_get();
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unsigned long remaining_jiffies;
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if (ktime_compare(*timeout, now) < 0) {
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remaining_jiffies = 0;
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} else {
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ktime_t rem = ktime_sub(*timeout, now);
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struct timespec ts = ktime_to_timespec(rem);
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remaining_jiffies = timespec_to_jiffies(&ts);
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}
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if (interruptible)
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ret = wait_event_interruptible_timeout(priv->fence_event,
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fence_completed(dev, fence),
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remaining_jiffies);
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else
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ret = wait_event_timeout(priv->fence_event,
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fence_completed(dev, fence),
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remaining_jiffies);
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if (ret == 0) {
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DBG("timeout waiting for fence: %u (completed: %u)",
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fence, priv->completed_fence);
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ret = -ETIMEDOUT;
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} else if (ret != -ERESTARTSYS) {
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ret = 0;
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}
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}
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return ret;
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}
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int msm_queue_fence_cb(struct drm_device *dev,
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struct msm_fence_cb *cb, uint32_t fence)
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{
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struct msm_drm_private *priv = dev->dev_private;
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int ret = 0;
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mutex_lock(&dev->struct_mutex);
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if (!list_empty(&cb->work.entry)) {
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ret = -EINVAL;
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} else if (fence > priv->completed_fence) {
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cb->fence = fence;
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list_add_tail(&cb->work.entry, &priv->fence_cbs);
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} else {
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queue_work(priv->wq, &cb->work);
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}
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mutex_unlock(&dev->struct_mutex);
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return ret;
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}
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/* called from workqueue */
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void msm_update_fence(struct drm_device *dev, uint32_t fence)
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{
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struct msm_drm_private *priv = dev->dev_private;
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mutex_lock(&dev->struct_mutex);
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priv->completed_fence = max(fence, priv->completed_fence);
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while (!list_empty(&priv->fence_cbs)) {
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struct msm_fence_cb *cb;
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cb = list_first_entry(&priv->fence_cbs,
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struct msm_fence_cb, work.entry);
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if (cb->fence > priv->completed_fence)
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break;
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list_del_init(&cb->work.entry);
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queue_work(priv->wq, &cb->work);
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}
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mutex_unlock(&dev->struct_mutex);
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wake_up_all(&priv->fence_event);
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}
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void __msm_fence_worker(struct work_struct *work)
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{
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struct msm_fence_cb *cb = container_of(work, struct msm_fence_cb, work);
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cb->func(cb);
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}
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