diff options
Diffstat (limited to 'linux/i830_irq.c')
| -rw-r--r-- | linux/i830_irq.c | 208 |
1 files changed, 0 insertions, 208 deletions
diff --git a/linux/i830_irq.c b/linux/i830_irq.c deleted file mode 100644 index 0f01d088..00000000 --- a/linux/i830_irq.c +++ /dev/null @@ -1,208 +0,0 @@ -/* i830_dma.c -- DMA support for the I830 -*- linux-c -*- - * - * Copyright 2002 Tungsten Graphics, Inc. - * All Rights Reserved. - * - * 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 - * TUNGSTEN GRAPHICS 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> - * - */ - -#include "i830.h" -#include "drmP.h" -#include "drm.h" -#include "i830_drm.h" -#include "i830_drv.h" -#include <linux/interrupt.h> /* For task queue support */ -#include <linux/delay.h> - - -irqreturn_t i830_driver_irq_handler( DRM_IRQ_ARGS ) -{ - drm_device_t *dev = (drm_device_t *)arg; - drm_i830_private_t *dev_priv = (drm_i830_private_t *)dev->dev_private; - u16 temp; - - temp = I830_READ16(I830REG_INT_IDENTITY_R); - DRM_DEBUG("%x\n", temp); - - if ( !( temp & 2 ) ) - return IRQ_NONE; - - I830_WRITE16(I830REG_INT_IDENTITY_R, temp); - - atomic_inc(&dev_priv->irq_received); - wake_up_interruptible(&dev_priv->irq_queue); - - return IRQ_HANDLED; -} - - -int i830_emit_irq(drm_device_t *dev) -{ - drm_i830_private_t *dev_priv = dev->dev_private; - RING_LOCALS; - - DRM_DEBUG("%s\n", __FUNCTION__); - - atomic_inc(&dev_priv->irq_emitted); - - BEGIN_LP_RING(2); - OUT_RING( 0 ); - OUT_RING( GFX_OP_USER_INTERRUPT ); - ADVANCE_LP_RING(); - - return atomic_read(&dev_priv->irq_emitted); -} - - -int i830_wait_irq(drm_device_t *dev, int irq_nr) -{ - drm_i830_private_t *dev_priv = - (drm_i830_private_t *)dev->dev_private; - DECLARE_WAITQUEUE(entry, current); - unsigned long end = jiffies + HZ*3; - int ret = 0; - - DRM_DEBUG("%s\n", __FUNCTION__); - - if (atomic_read(&dev_priv->irq_received) >= irq_nr) - return 0; - - dev_priv->sarea_priv->perf_boxes |= I830_BOX_WAIT; - - add_wait_queue(&dev_priv->irq_queue, &entry); - - for (;;) { - current->state = TASK_INTERRUPTIBLE; - if (atomic_read(&dev_priv->irq_received) >= irq_nr) - break; - if((signed)(end - jiffies) <= 0) { - DRM_ERROR("timeout iir %x imr %x ier %x hwstam %x\n", - I830_READ16( I830REG_INT_IDENTITY_R ), - I830_READ16( I830REG_INT_MASK_R ), - I830_READ16( I830REG_INT_ENABLE_R ), - I830_READ16( I830REG_HWSTAM )); - - ret = -EBUSY; /* Lockup? Missed irq? */ - break; - } - schedule_timeout(HZ*3); - if (signal_pending(current)) { - ret = -EINTR; - break; - } - } - - current->state = TASK_RUNNING; - remove_wait_queue(&dev_priv->irq_queue, &entry); - return ret; -} - - -/* Needs the lock as it touches the ring. - */ -int i830_irq_emit( struct inode *inode, struct file *filp, unsigned int cmd, - unsigned long arg ) -{ - drm_file_t *priv = filp->private_data; - drm_device_t *dev = priv->dev; - drm_i830_private_t *dev_priv = dev->dev_private; - drm_i830_irq_emit_t emit; - int result; - - if(!_DRM_LOCK_IS_HELD(dev->lock.hw_lock->lock)) { - DRM_ERROR("i830_irq_emit called without lock held\n"); - return -EINVAL; - } - - if ( !dev_priv ) { - DRM_ERROR( "%s called with no initialization\n", __FUNCTION__ ); - return -EINVAL; - } - - if (copy_from_user( &emit, (drm_i830_irq_emit_t __user *)arg, sizeof(emit) )) - return -EFAULT; - - result = i830_emit_irq( dev ); - - if ( copy_to_user( emit.irq_seq, &result, sizeof(int) ) ) { - DRM_ERROR( "copy_to_user\n" ); - return -EFAULT; - } - - return 0; -} - - -/* Doesn't need the hardware lock. - */ -int i830_irq_wait( struct inode *inode, struct file *filp, unsigned int cmd, - unsigned long arg ) -{ - drm_file_t *priv = filp->private_data; - drm_device_t *dev = priv->dev; - drm_i830_private_t *dev_priv = dev->dev_private; - drm_i830_irq_wait_t irqwait; - - if ( !dev_priv ) { - DRM_ERROR( "%s called with no initialization\n", __FUNCTION__ ); - return -EINVAL; - } - - if (copy_from_user( &irqwait, (drm_i830_irq_wait_t __user *)arg, - sizeof(irqwait) )) - return -EFAULT; - - return i830_wait_irq( dev, irqwait.irq_seq ); -} - - -/* drm_dma.h hooks -*/ -void i830_driver_irq_preinstall( drm_device_t *dev ) { - drm_i830_private_t *dev_priv = - (drm_i830_private_t *)dev->dev_private; - - I830_WRITE16( I830REG_HWSTAM, 0xffff ); - I830_WRITE16( I830REG_INT_MASK_R, 0x0 ); - I830_WRITE16( I830REG_INT_ENABLE_R, 0x0 ); - atomic_set(&dev_priv->irq_received, 0); - atomic_set(&dev_priv->irq_emitted, 0); - init_waitqueue_head(&dev_priv->irq_queue); -} - -void i830_driver_irq_postinstall( drm_device_t *dev ) { - drm_i830_private_t *dev_priv = - (drm_i830_private_t *)dev->dev_private; - - I830_WRITE16( I830REG_INT_ENABLE_R, 0x2 ); -} - -void i830_driver_irq_uninstall( drm_device_t *dev ) { - drm_i830_private_t *dev_priv = - (drm_i830_private_t *)dev->dev_private; - if (!dev_priv) - return; - - I830_WRITE16( I830REG_INT_MASK_R, 0xffff ); - I830_WRITE16( I830REG_INT_ENABLE_R, 0x0 ); -} |