i915_irq.c revision e92e3a8694f157faf8a9e44096a70ada86c556bf
/* BEGIN CSTYLED */
/* i915_irq.c -- IRQ support for the I915 -*- linux-c -*-
*/
/*
* Copyright 2003 Tungsten Graphics, Inc., Cedar Park, Texas.
* 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,
* 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 NON-INFRINGEMENT.
* 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.
*
*/
/*
* Copyright 2007 Sun Microsystems, Inc. All rights reserved.
* Use is subject to license terms.
*/
#pragma ident "%Z%%M% %I% %E% SMI"
#include "drmP.h"
#include "drm.h"
#include "i915_drm.h"
#include "i915_drv.h"
/**
* Emit blits for scheduled buffer swaps.
*
* This function will be called with the HW lock held.
*/
{
/* LINTED E_FUNC_VAR_UNUSED */
unsigned long irqflags;
nhits = 0;
/* Find buffer swaps scheduled for this vertical blank */
continue;
if (!drw) {
continue;
}
if (drw_cmp &&
break;
}
}
/* List of hits was empty, or we reached the end of it */
nhits++;
}
if (nhits == 0) {
return;
}
BEGIN_LP_RING(6);
OUT_RING(0);
OUT_RING(0);
OUT_RING(0);
/* Emit blits for buffer swaps, partitioning both outputs into as many
* slices as there are buffer swaps scheduled in order to avoid tearing
* (based on the assumption that a single buffer swap would always
* complete before scanout starts).
*/
for (i = 0; i++ < nhits;
if (i == nhits)
if (!drw)
continue;
continue;
BEGIN_LP_RING(8);
}
}
}
}
}
{
#if 0
#endif
if (temp == 0)
return IRQ_NONE;
if (temp & USER_INT_FLAG) {
#ifdef I915_HAVE_FENCE
#endif
}
if ((vblank_pipe &
== (DRM_I915_VBLANK_PIPE_A | DRM_I915_VBLANK_PIPE_B)) {
if (temp & VSYNC_PIPEA_FLAG)
if (temp & VSYNC_PIPEB_FLAG)
} else if (((temp & VSYNC_PIPEA_FLAG) &&
(vblank_pipe & DRM_I915_VBLANK_PIPE_A)) ||
((temp & VSYNC_PIPEB_FLAG) &&
if (dev_priv->swaps_pending > 0)
}
return IRQ_HANDLED;
}
{
BEGIN_LP_RING(6);
OUT_RING(20);
OUT_RING(0);
OUT_RING(0);
}
{
}
}
{
/*EMPTY*/;
// dev_priv->irq_enable_reg &= ~USER_INT_FLAG;
// I915_WRITE16(I915REG_INT_ENABLE_R, dev_priv->irq_enable_reg);
}
}
{
int ret = 0;
return 0;
DRM_ERROR("%s: EBUSY -- rec: %d emitted: %d\n",
}
return ret;
}
{
unsigned int cur_vblank;
int ret = 0;
if (!dev_priv) {
}
*sequence = cur_vblank;
return ret;
}
{
}
{
}
/* Needs the lock as it touches the ring.
*/
/*ARGSUSED*/
{
int result;
if (!dev_priv) {
}
sizeof (drm_i915_irq_emit32_t));
} else
sizeof(emit));
DRM_ERROR("copy_to_user\n");
}
return 0;
}
/* Doesn't need the hardware lock.
*/
/*ARGSUSED*/
{
if (!dev_priv) {
}
sizeof(irqwait));
}
{
}
/* drm_dma.h hooks
*/
{
}
{
dev_priv->swaps_pending = 0;
if (!dev_priv->vblank_pipe)
dev_priv->user_irq_refcount = 0;
if (!dev_priv->vblank_pipe)
/*
* Initialize the hardware status page IRQ location.
*/
}
{
if (!dev_priv)
return;
dev_priv->irq_enabled = 0;
#endif
}