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1d0d7f3ee4
locking, and the apparently unnecessary locking for -stable has been removed. This may fix issues with missed interrupts since April, which manifested themselves as slowdowns or hangs in radeon, in particular. Many cleanups also took place. In the shared code, there are improvements to r128 driver stability.
106 lines
3.2 KiB
C
106 lines
3.2 KiB
C
/* mga_irq.c -- IRQ handling for radeon -*- linux-c -*-
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*
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* Copyright (C) The Weather Channel, Inc. 2002. All Rights Reserved.
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*
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* The Weather Channel (TM) funded Tungsten Graphics to develop the
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* initial release of the Radeon 8500 driver under the XFree86 license.
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* This notice must be preserved.
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*
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* Permission is hereby granted, free of charge, to any person obtaining a
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* copy of this software and associated documentation files (the "Software"),
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* to deal in the Software without restriction, including without limitation
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* the rights to use, copy, modify, merge, publish, distribute, sublicense,
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* and/or sell copies of the Software, and to permit persons to whom the
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* Software is furnished to do so, subject to the following conditions:
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*
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* The above copyright notice and this permission notice (including the next
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* paragraph) shall be included in all copies or substantial portions of the
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* Software.
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*
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* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
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* IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
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* FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
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* PRECISION INSIGHT AND/OR ITS SUPPLIERS BE LIABLE FOR ANY CLAIM, DAMAGES OR
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* OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE,
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* ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER
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* DEALINGS IN THE SOFTWARE.
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*
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* Authors:
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* Keith Whitwell <keith@tungstengraphics.com>
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* Eric Anholt <anholt@FreeBSD.org>
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*
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* $FreeBSD$
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*/
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#include "dev/drm/mga.h"
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#include "dev/drm/drmP.h"
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#include "dev/drm/drm.h"
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#include "dev/drm/mga_drm.h"
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#include "dev/drm/mga_drv.h"
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irqreturn_t mga_irq_handler( DRM_IRQ_ARGS )
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{
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drm_device_t *dev = (drm_device_t *) arg;
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drm_mga_private_t *dev_priv =
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(drm_mga_private_t *)dev->dev_private;
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int status;
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status = MGA_READ( MGA_STATUS );
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/* VBLANK interrupt */
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if ( status & MGA_VLINEPEN ) {
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MGA_WRITE( MGA_ICLEAR, MGA_VLINEICLR );
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atomic_inc(&dev->vbl_received);
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DRM_WAKEUP(&dev->vbl_queue);
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DRM(vbl_send_signals)( dev );
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return IRQ_HANDLED;
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}
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return IRQ_NONE;
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}
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int mga_vblank_wait(drm_device_t *dev, unsigned int *sequence)
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{
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unsigned int cur_vblank;
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int ret = 0;
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/* Assume that the user has missed the current sequence number
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* by about a day rather than she wants to wait for years
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* using vertical blanks...
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*/
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DRM_WAIT_ON( ret, dev->vbl_queue, 3*DRM_HZ,
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( ( ( cur_vblank = atomic_read(&dev->vbl_received ) )
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- *sequence ) <= (1<<23) ) );
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*sequence = cur_vblank;
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return ret;
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}
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void mga_driver_irq_preinstall( drm_device_t *dev ) {
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drm_mga_private_t *dev_priv =
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(drm_mga_private_t *)dev->dev_private;
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/* Disable *all* interrupts */
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MGA_WRITE( MGA_IEN, 0 );
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/* Clear bits if they're already high */
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MGA_WRITE( MGA_ICLEAR, ~0 );
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}
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void mga_driver_irq_postinstall( drm_device_t *dev ) {
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drm_mga_private_t *dev_priv =
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(drm_mga_private_t *)dev->dev_private;
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/* Turn on VBL interrupt */
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MGA_WRITE( MGA_IEN, MGA_VLINEIEN );
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}
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void mga_driver_irq_uninstall( drm_device_t *dev ) {
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drm_mga_private_t *dev_priv =
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(drm_mga_private_t *)dev->dev_private;
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if (!dev_priv)
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return;
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/* Disable *all* interrupts */
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MGA_WRITE( MGA_IEN, 0 );
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}
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