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/**************************************************************************
* Copyright (c) 2011, Intel Corporation.
*
* This program is free software; you can redistribute it and/or modify it
* under the terms and conditions of the GNU General Public License,
* version 2, as published by the Free Software Foundation.
*
* This program is distributed in the hope it will be useful, but WITHOUT
* ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
* FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for
* more details.
*
* You should have received a copy of the GNU General Public License along with
* this program; if not, write to the Free Software Foundation, Inc.,
* 51 Franklin St - Fifth Floor, Boston, MA 02110-1301 USA.
*
* Authors: Thomas Hellstrom <thomas-at-tungstengraphics-dot-com>
**************************************************************************/
#include <drm/drmP.h>
#include "psb_drv.h"
#include "psb_reg.h"
#include "psb_intel_reg.h"
#include "psb_msvdx.h"
#include <linux/spinlock.h>
void psb_schedule_watchdog(struct drm_psb_private *dev_priv)
{
struct timer_list *wt = &dev_priv->watchdog_timer;
unsigned long irq_flags;
spin_lock_irqsave(&dev_priv->watchdog_lock, irq_flags);
if (dev_priv->timer_available && !timer_pending(wt)) {
wt->expires = jiffies + PSB_WATCHDOG_DELAY;
add_timer(wt);
}
spin_unlock_irqrestore(&dev_priv->watchdog_lock, irq_flags);
}
static void psb_watchdog_func(unsigned long data)
{
struct drm_psb_private *dev_priv = (struct drm_psb_private *) data;
int msvdx_lockup;
int msvdx_idle;
unsigned long irq_flags;
psb_msvdx_lockup(dev_priv, &msvdx_lockup, &msvdx_idle);
if (msvdx_lockup) {
spin_lock_irqsave(&dev_priv->watchdog_lock, irq_flags);
dev_priv->timer_available = 0;
spin_unlock_irqrestore(&dev_priv->watchdog_lock,
irq_flags);
if (msvdx_lockup)
schedule_work(&dev_priv->msvdx_watchdog_wq);
}
if (!msvdx_idle)
psb_schedule_watchdog(dev_priv);
}
void psb_msvdx_flush_cmd_queue(struct drm_device *dev)
{
struct drm_psb_private *dev_priv = dev->dev_private;
struct psb_msvdx_cmd_queue *msvdx_cmd;
struct list_head *list, *next;
struct msvdx_private *msvdx_priv = dev_priv->msvdx_private;
/*Flush the msvdx cmd queue and signal all fences in the queue */
list_for_each_safe(list, next, &msvdx_priv->msvdx_queue) {
msvdx_cmd =
list_entry(list, struct psb_msvdx_cmd_queue, head);
PSB_DEBUG_GENERAL("MSVDXQUE: flushing sequence:%d\n",
msvdx_cmd->sequence);
msvdx_priv->msvdx_current_sequence = msvdx_cmd->sequence;
psb_fence_error(dev, PSB_ENGINE_VIDEO,
msvdx_priv->msvdx_current_sequence,
_PSB_FENCE_TYPE_EXE, DRM_CMD_HANG);
list_del(list);
kfree(msvdx_cmd->cmd);
kfree(msvdx_cmd
);
}
}
static void psb_msvdx_reset_wq(struct work_struct *work)
{
struct drm_psb_private *dev_priv =
container_of(work, struct drm_psb_private, msvdx_watchdog_wq);
struct msvdx_private *msvdx_priv = dev_priv->msvdx_private;
struct psb_scheduler *scheduler = &dev_priv->scheduler;
unsigned long irq_flags;
mutex_lock(&msvdx_priv->msvdx_mutex);
msvdx_priv->msvdx_needs_reset = 1;
msvdx_priv->msvdx_current_sequence++;
PSB_DEBUG_GENERAL
("MSVDXFENCE: incremented msvdx_current_sequence to :%d\n",
msvdx_priv->msvdx_current_sequence);
psb_fence_error(scheduler->dev, PSB_ENGINE_VIDEO,
msvdx_priv->msvdx_current_sequence,
_PSB_FENCE_TYPE_EXE, DRM_CMD_HANG);
spin_lock_irqsave(&dev_priv->watchdog_lock, irq_flags);
dev_priv->timer_available = 1;
spin_unlock_irqrestore(&dev_priv->watchdog_lock, irq_flags);
spin_lock_irqsave(&msvdx_priv->msvdx_lock, irq_flags);
psb_msvdx_flush_cmd_queue(scheduler->dev);
spin_unlock_irqrestore(&msvdx_priv->msvdx_lock, irq_flags);
psb_schedule_watchdog(dev_priv);
mutex_unlock(&msvdx_priv->msvdx_mutex);
}
void psb_watchdog_init(struct drm_psb_private *dev_priv)
{
struct timer_list *wt = &dev_priv->watchdog_timer;
unsigned long irq_flags;
spin_lock_init(&dev_priv->watchdog_lock);
spin_lock_irqsave(&dev_priv->watchdog_lock, irq_flags);
init_timer(wt);
INIT_WORK(&dev_priv->msvdx_watchdog_wq, &psb_msvdx_reset_wq);
wt->data = (unsigned long) dev_priv;
wt->function = &psb_watchdog_func;
dev_priv->timer_available = 1;
spin_unlock_irqrestore(&dev_priv->watchdog_lock, irq_flags);
}
void psb_watchdog_takedown(struct drm_psb_private *dev_priv)
{
unsigned long irq_flags;
spin_lock_irqsave(&dev_priv->watchdog_lock, irq_flags);
dev_priv->timer_available = 0;
spin_unlock_irqrestore(&dev_priv->watchdog_lock, irq_flags);
(void) del_timer_sync(&dev_priv->watchdog_timer);
}
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