149 lines
4.3 KiB
C
149 lines
4.3 KiB
C
/* mga_irq.c -- IRQ handling for radeon -*- linux-c -*-
|
|
*
|
|
* Copyright (C) The Weather Channel, Inc. 2002. All Rights Reserved.
|
|
*
|
|
* The Weather Channel (TM) funded Tungsten Graphics to develop the
|
|
* initial release of the Radeon 8500 driver under the XFree86 license.
|
|
* This notice must be preserved.
|
|
*
|
|
* 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
|
|
* PRECISION INSIGHT 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:
|
|
* Keith Whitwell <keith@tungstengraphics.com>
|
|
* Eric Anholt <anholt@FreeBSD.org>
|
|
*/
|
|
|
|
#include "drmP.h"
|
|
#include "drm.h"
|
|
#include "mga_drm.h"
|
|
#include "mga_drv.h"
|
|
|
|
irqreturn_t mga_driver_irq_handler(DRM_IRQ_ARGS)
|
|
{
|
|
drm_device_t *dev = (drm_device_t *) arg;
|
|
drm_mga_private_t *dev_priv = (drm_mga_private_t *) dev->dev_private;
|
|
int status;
|
|
int handled = 0;
|
|
|
|
status = MGA_READ(MGA_STATUS);
|
|
|
|
/* VBLANK interrupt */
|
|
if (status & MGA_VLINEPEN) {
|
|
MGA_WRITE(MGA_ICLEAR, MGA_VLINEICLR);
|
|
atomic_inc(&dev->vbl_received);
|
|
DRM_WAKEUP(&dev->vbl_queue);
|
|
drm_vbl_send_signals(dev);
|
|
handled = 1;
|
|
}
|
|
|
|
/* SOFTRAP interrupt */
|
|
if (status & MGA_SOFTRAPEN) {
|
|
const u32 prim_start = MGA_READ(MGA_PRIMADDRESS);
|
|
const u32 prim_end = MGA_READ(MGA_PRIMEND);
|
|
|
|
MGA_WRITE(MGA_ICLEAR, MGA_SOFTRAPICLR);
|
|
|
|
/* In addition to clearing the interrupt-pending bit, we
|
|
* have to write to MGA_PRIMEND to re-start the DMA operation.
|
|
*/
|
|
if ((prim_start & ~0x03) != (prim_end & ~0x03)) {
|
|
MGA_WRITE(MGA_PRIMEND, prim_end);
|
|
}
|
|
|
|
atomic_inc(&dev_priv->last_fence_retired);
|
|
DRM_WAKEUP(&dev_priv->fence_queue);
|
|
handled = 1;
|
|
}
|
|
|
|
if (handled) {
|
|
return IRQ_HANDLED;
|
|
}
|
|
return IRQ_NONE;
|
|
}
|
|
|
|
int mga_driver_vblank_wait(drm_device_t * dev, unsigned int *sequence)
|
|
{
|
|
unsigned int cur_vblank;
|
|
int ret = 0;
|
|
|
|
/* Assume that the user has missed the current sequence number
|
|
* by about a day rather than she wants to wait for years
|
|
* using vertical blanks...
|
|
*/
|
|
DRM_WAIT_ON(ret, dev->vbl_queue, 3 * DRM_HZ,
|
|
(((cur_vblank = atomic_read(&dev->vbl_received))
|
|
- *sequence) <= (1 << 23)));
|
|
|
|
*sequence = cur_vblank;
|
|
|
|
return ret;
|
|
}
|
|
|
|
int mga_driver_fence_wait(drm_device_t * dev, unsigned int *sequence)
|
|
{
|
|
drm_mga_private_t *dev_priv = (drm_mga_private_t *) dev->dev_private;
|
|
unsigned int cur_fence;
|
|
int ret = 0;
|
|
|
|
/* Assume that the user has missed the current sequence number
|
|
* by about a day rather than she wants to wait for years
|
|
* using fences.
|
|
*/
|
|
DRM_WAIT_ON(ret, dev_priv->fence_queue, 3 * DRM_HZ,
|
|
(((cur_fence = atomic_read(&dev_priv->last_fence_retired))
|
|
- *sequence) <= (1 << 23)));
|
|
|
|
*sequence = cur_fence;
|
|
|
|
return ret;
|
|
}
|
|
|
|
void mga_driver_irq_preinstall(drm_device_t * dev)
|
|
{
|
|
drm_mga_private_t *dev_priv = (drm_mga_private_t *) dev->dev_private;
|
|
|
|
/* Disable *all* interrupts */
|
|
MGA_WRITE(MGA_IEN, 0);
|
|
/* Clear bits if they're already high */
|
|
MGA_WRITE(MGA_ICLEAR, ~0);
|
|
}
|
|
|
|
void mga_driver_irq_postinstall(drm_device_t * dev)
|
|
{
|
|
drm_mga_private_t *dev_priv = (drm_mga_private_t *) dev->dev_private;
|
|
|
|
DRM_INIT_WAITQUEUE(&dev_priv->fence_queue);
|
|
|
|
/* Turn on vertical blank interrupt and soft trap interrupt. */
|
|
MGA_WRITE(MGA_IEN, MGA_VLINEIEN | MGA_SOFTRAPEN);
|
|
}
|
|
|
|
void mga_driver_irq_uninstall(drm_device_t * dev)
|
|
{
|
|
drm_mga_private_t *dev_priv = (drm_mga_private_t *) dev->dev_private;
|
|
if (!dev_priv)
|
|
return;
|
|
|
|
/* Disable *all* interrupts */
|
|
MGA_WRITE(MGA_IEN, 0);
|
|
|
|
dev->irq_enabled = 0;
|
|
}
|