1 /* r128_irq.c -- IRQ handling for radeon -*- linux-c -*-
3 * Copyright (C) The Weather Channel, Inc. 2002. All Rights Reserved.
5 * The Weather Channel (TM) funded Tungsten Graphics to develop the
6 * initial release of the Radeon 8500 driver under the XFree86 license.
7 * This notice must be preserved.
9 * Permission is hereby granted, free of charge, to any person obtaining a
10 * copy of this software and associated documentation files (the "Software"),
11 * to deal in the Software without restriction, including without limitation
12 * the rights to use, copy, modify, merge, publish, distribute, sublicense,
13 * and/or sell copies of the Software, and to permit persons to whom the
14 * Software is furnished to do so, subject to the following conditions:
16 * The above copyright notice and this permission notice (including the next
17 * paragraph) shall be included in all copies or substantial portions of the
20 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
21 * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
22 * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
23 * PRECISION INSIGHT AND/OR ITS SUPPLIERS BE LIABLE FOR ANY CLAIM, DAMAGES OR
24 * OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE,
25 * ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER
26 * DEALINGS IN THE SOFTWARE.
29 * Keith Whitwell <keith@tungstengraphics.com>
30 * Eric Anholt <anholt@FreeBSD.org>
39 void r128_dma_service( DRM_IRQ_ARGS )
41 drm_device_t *dev = (drm_device_t *) arg;
42 drm_r128_private_t *dev_priv =
43 (drm_r128_private_t *)dev->dev_private;
46 status = R128_READ( R128_GEN_INT_STATUS );
48 /* VBLANK interrupt */
49 if ( status & R128_CRTC_VBLANK_INT ) {
50 R128_WRITE( R128_GEN_INT_STATUS, R128_CRTC_VBLANK_INT_AK );
51 atomic_inc(&dev->vbl_received);
52 DRM_WAKEUP(&dev->vbl_queue);
54 /* kick off bottom half for signals */
55 queue_task(&dev->vbl_tq, &tq_immediate);
56 mark_bh(IMMEDIATE_BH);
60 int DRM(vblank_wait)(drm_device_t *dev, unsigned int *sequence)
62 unsigned int cur_vblank;
65 /* Assume that the user has missed the current sequence number
66 * by about a day rather than she wants to wait for years
67 * using vertical blanks...
69 DRM_WAIT_ON( ret, dev->vbl_queue, 3*DRM_HZ,
70 ( ( ( cur_vblank = atomic_read(&dev->vbl_received ) )
71 + ~*sequence + 1 ) <= (1<<23) ) );
73 *sequence = cur_vblank;
78 void r128_driver_irq_preinstall( drm_device_t *dev ) {
79 drm_r128_private_t *dev_priv =
80 (drm_r128_private_t *)dev->dev_private;
82 /* Disable *all* interrupts */
83 R128_WRITE( R128_GEN_INT_CNTL, 0 );
84 /* Clear vblank bit if it's already high */
85 R128_WRITE( R128_GEN_INT_STATUS, R128_CRTC_VBLANK_INT_AK );
88 void r128_driver_irq_postinstall( drm_device_t *dev ) {
89 drm_r128_private_t *dev_priv =
90 (drm_r128_private_t *)dev->dev_private;
92 /* Turn on VBL interrupt */
93 R128_WRITE( R128_GEN_INT_CNTL, R128_CRTC_VBLANK_INT_EN );
96 void r128_driver_irq_uninstall( drm_device_t *dev ) {
97 drm_r128_private_t *dev_priv =
98 (drm_r128_private_t *)dev->dev_private;
100 /* Disable *all* interrupts */
101 R128_WRITE( R128_GEN_INT_CNTL, 0 );