mirror of
https://github.com/AuxXxilium/linux_dsm_epyc7002.git
synced 2024-12-13 00:46:55 +07:00
1da177e4c3
Initial git repository build. I'm not bothering with the full history, even though we have it. We can create a separate "historical" git archive of that later if we want to, and in the meantime it's about 3.2GB when imported into git - space that would just make the early git days unnecessarily complicated, when we don't have a lot of good infrastructure for it. Let it rip!
103 lines
3.1 KiB
C
103 lines
3.1 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;
|
|
|
|
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 );
|
|
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;
|
|
}
|
|
|
|
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;
|
|
|
|
/* Turn on VBL interrupt */
|
|
MGA_WRITE( MGA_IEN, MGA_VLINEIEN );
|
|
}
|
|
|
|
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 );
|
|
}
|