blob: 5841f7674956b2873b8d5d15a39fc9c160d421d8 [file] [log] [blame]
Linus Torvalds1da177e2005-04-16 15:20:36 -07001/* i830_dma.c -- DMA support for the I830 -*- linux-c -*-
2 *
3 * Copyright 2002 Tungsten Graphics, Inc.
4 * All Rights Reserved.
5 *
6 * Permission is hereby granted, free of charge, to any person obtaining a
7 * copy of this software and associated documentation files (the "Software"),
8 * to deal in the Software without restriction, including without limitation
9 * the rights to use, copy, modify, merge, publish, distribute, sublicense,
10 * and/or sell copies of the Software, and to permit persons to whom the
11 * Software is furnished to do so, subject to the following conditions:
Dave Airlieb5e89ed2005-09-25 14:28:13 +100012 *
Linus Torvalds1da177e2005-04-16 15:20:36 -070013 * The above copyright notice and this permission notice (including the next
14 * paragraph) shall be included in all copies or substantial portions of the
15 * Software.
Dave Airlieb5e89ed2005-09-25 14:28:13 +100016 *
Linus Torvalds1da177e2005-04-16 15:20:36 -070017 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
18 * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
19 * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
20 * TUNGSTEN GRAPHICS AND/OR ITS SUPPLIERS BE LIABLE FOR ANY CLAIM, DAMAGES OR
21 * OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE,
22 * ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER
23 * DEALINGS IN THE SOFTWARE.
24 *
25 * Authors: Keith Whitwell <keith@tungstengraphics.com>
26 *
27 */
28
29#include "drmP.h"
30#include "drm.h"
31#include "i830_drm.h"
32#include "i830_drv.h"
33#include <linux/interrupt.h> /* For task queue support */
34#include <linux/delay.h>
35
Dave Airlieb5e89ed2005-09-25 14:28:13 +100036irqreturn_t i830_driver_irq_handler(DRM_IRQ_ARGS)
Linus Torvalds1da177e2005-04-16 15:20:36 -070037{
Dave Airlieb5e89ed2005-09-25 14:28:13 +100038 drm_device_t *dev = (drm_device_t *) arg;
39 drm_i830_private_t *dev_priv = (drm_i830_private_t *) dev->dev_private;
40 u16 temp;
Linus Torvalds1da177e2005-04-16 15:20:36 -070041
Dave Airlieb5e89ed2005-09-25 14:28:13 +100042 temp = I830_READ16(I830REG_INT_IDENTITY_R);
Linus Torvalds1da177e2005-04-16 15:20:36 -070043 DRM_DEBUG("%x\n", temp);
44
Dave Airlieb5e89ed2005-09-25 14:28:13 +100045 if (!(temp & 2))
Linus Torvalds1da177e2005-04-16 15:20:36 -070046 return IRQ_NONE;
47
Dave Airlieb5e89ed2005-09-25 14:28:13 +100048 I830_WRITE16(I830REG_INT_IDENTITY_R, temp);
Linus Torvalds1da177e2005-04-16 15:20:36 -070049
50 atomic_inc(&dev_priv->irq_received);
Dave Airlieb5e89ed2005-09-25 14:28:13 +100051 wake_up_interruptible(&dev_priv->irq_queue);
Linus Torvalds1da177e2005-04-16 15:20:36 -070052
53 return IRQ_HANDLED;
54}
55
Dave Airlieb5e89ed2005-09-25 14:28:13 +100056static int i830_emit_irq(drm_device_t * dev)
Linus Torvalds1da177e2005-04-16 15:20:36 -070057{
58 drm_i830_private_t *dev_priv = dev->dev_private;
59 RING_LOCALS;
60
61 DRM_DEBUG("%s\n", __FUNCTION__);
62
63 atomic_inc(&dev_priv->irq_emitted);
64
Dave Airlieb5e89ed2005-09-25 14:28:13 +100065 BEGIN_LP_RING(2);
66 OUT_RING(0);
67 OUT_RING(GFX_OP_USER_INTERRUPT);
68 ADVANCE_LP_RING();
Linus Torvalds1da177e2005-04-16 15:20:36 -070069
70 return atomic_read(&dev_priv->irq_emitted);
71}
72
Dave Airlieb5e89ed2005-09-25 14:28:13 +100073static int i830_wait_irq(drm_device_t * dev, int irq_nr)
Linus Torvalds1da177e2005-04-16 15:20:36 -070074{
Dave Airlieb5e89ed2005-09-25 14:28:13 +100075 drm_i830_private_t *dev_priv = (drm_i830_private_t *) dev->dev_private;
Linus Torvalds1da177e2005-04-16 15:20:36 -070076 DECLARE_WAITQUEUE(entry, current);
Dave Airlieb5e89ed2005-09-25 14:28:13 +100077 unsigned long end = jiffies + HZ * 3;
Linus Torvalds1da177e2005-04-16 15:20:36 -070078 int ret = 0;
79
80 DRM_DEBUG("%s\n", __FUNCTION__);
81
Dave Airlieb5e89ed2005-09-25 14:28:13 +100082 if (atomic_read(&dev_priv->irq_received) >= irq_nr)
83 return 0;
Linus Torvalds1da177e2005-04-16 15:20:36 -070084
85 dev_priv->sarea_priv->perf_boxes |= I830_BOX_WAIT;
86
87 add_wait_queue(&dev_priv->irq_queue, &entry);
88
89 for (;;) {
90 __set_current_state(TASK_INTERRUPTIBLE);
Dave Airlieb5e89ed2005-09-25 14:28:13 +100091 if (atomic_read(&dev_priv->irq_received) >= irq_nr)
92 break;
93 if ((signed)(end - jiffies) <= 0) {
Linus Torvalds1da177e2005-04-16 15:20:36 -070094 DRM_ERROR("timeout iir %x imr %x ier %x hwstam %x\n",
Dave Airlieb5e89ed2005-09-25 14:28:13 +100095 I830_READ16(I830REG_INT_IDENTITY_R),
96 I830_READ16(I830REG_INT_MASK_R),
97 I830_READ16(I830REG_INT_ENABLE_R),
98 I830_READ16(I830REG_HWSTAM));
Linus Torvalds1da177e2005-04-16 15:20:36 -070099
Dave Airlieb5e89ed2005-09-25 14:28:13 +1000100 ret = -EBUSY; /* Lockup? Missed irq? */
Linus Torvalds1da177e2005-04-16 15:20:36 -0700101 break;
102 }
Dave Airlieb5e89ed2005-09-25 14:28:13 +1000103 schedule_timeout(HZ * 3);
104 if (signal_pending(current)) {
105 ret = -EINTR;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700106 break;
107 }
108 }
109
110 __set_current_state(TASK_RUNNING);
111 remove_wait_queue(&dev_priv->irq_queue, &entry);
112 return ret;
113}
114
Linus Torvalds1da177e2005-04-16 15:20:36 -0700115/* Needs the lock as it touches the ring.
116 */
Dave Airlieb5e89ed2005-09-25 14:28:13 +1000117int i830_irq_emit(struct inode *inode, struct file *filp, unsigned int cmd,
118 unsigned long arg)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700119{
Dave Airlieb5e89ed2005-09-25 14:28:13 +1000120 drm_file_t *priv = filp->private_data;
121 drm_device_t *dev = priv->head->dev;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700122 drm_i830_private_t *dev_priv = dev->dev_private;
123 drm_i830_irq_emit_t emit;
124 int result;
125
126 LOCK_TEST_WITH_RETURN(dev, filp);
127
Dave Airlieb5e89ed2005-09-25 14:28:13 +1000128 if (!dev_priv) {
129 DRM_ERROR("%s called with no initialization\n", __FUNCTION__);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700130 return -EINVAL;
131 }
132
Dave Airlieb5e89ed2005-09-25 14:28:13 +1000133 if (copy_from_user
134 (&emit, (drm_i830_irq_emit_t __user *) arg, sizeof(emit)))
Linus Torvalds1da177e2005-04-16 15:20:36 -0700135 return -EFAULT;
136
Dave Airlieb5e89ed2005-09-25 14:28:13 +1000137 result = i830_emit_irq(dev);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700138
Dave Airlieb5e89ed2005-09-25 14:28:13 +1000139 if (copy_to_user(emit.irq_seq, &result, sizeof(int))) {
140 DRM_ERROR("copy_to_user\n");
Linus Torvalds1da177e2005-04-16 15:20:36 -0700141 return -EFAULT;
142 }
143
144 return 0;
145}
146
Linus Torvalds1da177e2005-04-16 15:20:36 -0700147/* Doesn't need the hardware lock.
148 */
Dave Airlieb5e89ed2005-09-25 14:28:13 +1000149int i830_irq_wait(struct inode *inode, struct file *filp, unsigned int cmd,
150 unsigned long arg)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700151{
Dave Airlieb5e89ed2005-09-25 14:28:13 +1000152 drm_file_t *priv = filp->private_data;
153 drm_device_t *dev = priv->head->dev;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700154 drm_i830_private_t *dev_priv = dev->dev_private;
155 drm_i830_irq_wait_t irqwait;
156
Dave Airlieb5e89ed2005-09-25 14:28:13 +1000157 if (!dev_priv) {
158 DRM_ERROR("%s called with no initialization\n", __FUNCTION__);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700159 return -EINVAL;
160 }
161
Dave Airlieb5e89ed2005-09-25 14:28:13 +1000162 if (copy_from_user(&irqwait, (drm_i830_irq_wait_t __user *) arg,
163 sizeof(irqwait)))
Linus Torvalds1da177e2005-04-16 15:20:36 -0700164 return -EFAULT;
165
Dave Airlieb5e89ed2005-09-25 14:28:13 +1000166 return i830_wait_irq(dev, irqwait.irq_seq);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700167}
168
Linus Torvalds1da177e2005-04-16 15:20:36 -0700169/* drm_dma.h hooks
170*/
Dave Airlieb5e89ed2005-09-25 14:28:13 +1000171void i830_driver_irq_preinstall(drm_device_t * dev)
172{
173 drm_i830_private_t *dev_priv = (drm_i830_private_t *) dev->dev_private;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700174
Dave Airlieb5e89ed2005-09-25 14:28:13 +1000175 I830_WRITE16(I830REG_HWSTAM, 0xffff);
176 I830_WRITE16(I830REG_INT_MASK_R, 0x0);
177 I830_WRITE16(I830REG_INT_ENABLE_R, 0x0);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700178 atomic_set(&dev_priv->irq_received, 0);
179 atomic_set(&dev_priv->irq_emitted, 0);
180 init_waitqueue_head(&dev_priv->irq_queue);
181}
182
Dave Airlieb5e89ed2005-09-25 14:28:13 +1000183void i830_driver_irq_postinstall(drm_device_t * dev)
184{
185 drm_i830_private_t *dev_priv = (drm_i830_private_t *) dev->dev_private;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700186
Dave Airlieb5e89ed2005-09-25 14:28:13 +1000187 I830_WRITE16(I830REG_INT_ENABLE_R, 0x2);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700188}
189
Dave Airlieb5e89ed2005-09-25 14:28:13 +1000190void i830_driver_irq_uninstall(drm_device_t * dev)
191{
192 drm_i830_private_t *dev_priv = (drm_i830_private_t *) dev->dev_private;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700193 if (!dev_priv)
194 return;
195
Dave Airlieb5e89ed2005-09-25 14:28:13 +1000196 I830_WRITE16(I830REG_INT_MASK_R, 0xffff);
197 I830_WRITE16(I830REG_INT_ENABLE_R, 0x0);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700198}