diff options
Diffstat (limited to 'drivers/char/drm/i830_irq.c')
| -rw-r--r-- | drivers/char/drm/i830_irq.c | 186 |
1 files changed, 0 insertions, 186 deletions
diff --git a/drivers/char/drm/i830_irq.c b/drivers/char/drm/i830_irq.c deleted file mode 100644 index 91ec2bb497e..00000000000 --- a/drivers/char/drm/i830_irq.c +++ /dev/null @@ -1,186 +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 "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) -{ - struct drm_device *dev = (struct drm_device *) 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; -} - -static int i830_emit_irq(struct drm_device * dev) -{ - drm_i830_private_t *dev_priv = dev->dev_private; - RING_LOCALS; - - DRM_DEBUG("%s\n", __func__); - - 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); -} - -static int i830_wait_irq(struct drm_device * 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", __func__); - - 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 (;;) { - __set_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; - } - } - - __set_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 drm_device *dev, void *data, - struct drm_file *file_priv) -{ - drm_i830_private_t *dev_priv = dev->dev_private; - drm_i830_irq_emit_t *emit = data; - int result; - - LOCK_TEST_WITH_RETURN(dev, file_priv); - - if (!dev_priv) { - DRM_ERROR("%s called with no initialization\n", __func__); - return -EINVAL; - } - - 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 drm_device *dev, void *data, - struct drm_file *file_priv) -{ - drm_i830_private_t *dev_priv = dev->dev_private; - drm_i830_irq_wait_t *irqwait = data; - - if (!dev_priv) { - DRM_ERROR("%s called with no initialization\n", __func__); - return -EINVAL; - } - - return i830_wait_irq(dev, irqwait->irq_seq); -} - -/* drm_dma.h hooks -*/ -void i830_driver_irq_preinstall(struct drm_device * 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(struct drm_device * 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(struct drm_device * 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); -} |