mirror of
https://github.com/edk2-porting/linux-next.git
synced 2024-12-17 17:53:56 +08:00
1da177e4c3
Initial git repository build. I'm not bothering with the full history, even though we have it. We can create a separate "historical" git archive of that later if we want to, and in the meantime it's about 3.2GB when imported into git - space that would just make the early git days unnecessarily complicated, when we don't have a lot of good infrastructure for it. Let it rip!
162 lines
3.7 KiB
C
162 lines
3.7 KiB
C
/* i915_dma.c -- DMA support for the I915 -*- linux-c -*-
|
|
*/
|
|
/**************************************************************************
|
|
*
|
|
* Copyright 2003 Tungsten Graphics, Inc., Cedar Park, Texas.
|
|
* All Rights Reserved.
|
|
*
|
|
**************************************************************************/
|
|
|
|
#include "drmP.h"
|
|
#include "drm.h"
|
|
#include "i915_drm.h"
|
|
#include "i915_drv.h"
|
|
|
|
#define USER_INT_FLAG 0x2
|
|
#define MAX_NOPID ((u32)~0)
|
|
#define READ_BREADCRUMB(dev_priv) (((u32*)(dev_priv->hw_status_page))[5])
|
|
|
|
irqreturn_t i915_driver_irq_handler(DRM_IRQ_ARGS)
|
|
{
|
|
drm_device_t *dev = (drm_device_t *) arg;
|
|
drm_i915_private_t *dev_priv = (drm_i915_private_t *) dev->dev_private;
|
|
u16 temp;
|
|
|
|
temp = I915_READ16(I915REG_INT_IDENTITY_R);
|
|
temp &= USER_INT_FLAG;
|
|
|
|
DRM_DEBUG("%s flag=%08x\n", __FUNCTION__, temp);
|
|
|
|
if (temp == 0)
|
|
return IRQ_NONE;
|
|
|
|
I915_WRITE16(I915REG_INT_IDENTITY_R, temp);
|
|
DRM_WAKEUP(&dev_priv->irq_queue);
|
|
|
|
return IRQ_HANDLED;
|
|
}
|
|
|
|
int i915_emit_irq(drm_device_t * dev)
|
|
{
|
|
drm_i915_private_t *dev_priv = dev->dev_private;
|
|
u32 ret;
|
|
RING_LOCALS;
|
|
|
|
i915_kernel_lost_context(dev);
|
|
|
|
DRM_DEBUG("%s\n", __FUNCTION__);
|
|
|
|
ret = dev_priv->counter;
|
|
|
|
BEGIN_LP_RING(2);
|
|
OUT_RING(0);
|
|
OUT_RING(GFX_OP_USER_INTERRUPT);
|
|
ADVANCE_LP_RING();
|
|
|
|
return ret;
|
|
}
|
|
|
|
int i915_wait_irq(drm_device_t * dev, int irq_nr)
|
|
{
|
|
drm_i915_private_t *dev_priv = (drm_i915_private_t *) dev->dev_private;
|
|
int ret = 0;
|
|
|
|
DRM_DEBUG("%s irq_nr=%d breadcrumb=%d\n", __FUNCTION__, irq_nr,
|
|
READ_BREADCRUMB(dev_priv));
|
|
|
|
if (READ_BREADCRUMB(dev_priv) >= irq_nr)
|
|
return 0;
|
|
|
|
dev_priv->sarea_priv->perf_boxes |= I915_BOX_WAIT;
|
|
|
|
DRM_WAIT_ON(ret, dev_priv->irq_queue, 3 * DRM_HZ,
|
|
READ_BREADCRUMB(dev_priv) >= irq_nr);
|
|
|
|
if (ret == DRM_ERR(EBUSY)) {
|
|
DRM_ERROR("%s: EBUSY -- rec: %d emitted: %d\n",
|
|
__FUNCTION__,
|
|
READ_BREADCRUMB(dev_priv), (int)dev_priv->counter);
|
|
}
|
|
|
|
dev_priv->sarea_priv->last_dispatch = READ_BREADCRUMB(dev_priv);
|
|
return ret;
|
|
}
|
|
|
|
/* Needs the lock as it touches the ring.
|
|
*/
|
|
int i915_irq_emit(DRM_IOCTL_ARGS)
|
|
{
|
|
DRM_DEVICE;
|
|
drm_i915_private_t *dev_priv = dev->dev_private;
|
|
drm_i915_irq_emit_t emit;
|
|
int result;
|
|
|
|
LOCK_TEST_WITH_RETURN(dev, filp);
|
|
|
|
if (!dev_priv) {
|
|
DRM_ERROR("%s called with no initialization\n", __FUNCTION__);
|
|
return DRM_ERR(EINVAL);
|
|
}
|
|
|
|
DRM_COPY_FROM_USER_IOCTL(emit, (drm_i915_irq_emit_t __user *) data,
|
|
sizeof(emit));
|
|
|
|
result = i915_emit_irq(dev);
|
|
|
|
if (DRM_COPY_TO_USER(emit.irq_seq, &result, sizeof(int))) {
|
|
DRM_ERROR("copy_to_user\n");
|
|
return DRM_ERR(EFAULT);
|
|
}
|
|
|
|
return 0;
|
|
}
|
|
|
|
/* Doesn't need the hardware lock.
|
|
*/
|
|
int i915_irq_wait(DRM_IOCTL_ARGS)
|
|
{
|
|
DRM_DEVICE;
|
|
drm_i915_private_t *dev_priv = dev->dev_private;
|
|
drm_i915_irq_wait_t irqwait;
|
|
|
|
if (!dev_priv) {
|
|
DRM_ERROR("%s called with no initialization\n", __FUNCTION__);
|
|
return DRM_ERR(EINVAL);
|
|
}
|
|
|
|
DRM_COPY_FROM_USER_IOCTL(irqwait, (drm_i915_irq_wait_t __user *) data,
|
|
sizeof(irqwait));
|
|
|
|
return i915_wait_irq(dev, irqwait.irq_seq);
|
|
}
|
|
|
|
/* drm_dma.h hooks
|
|
*/
|
|
void i915_driver_irq_preinstall(drm_device_t * dev)
|
|
{
|
|
drm_i915_private_t *dev_priv = (drm_i915_private_t *) dev->dev_private;
|
|
|
|
I915_WRITE16(I915REG_HWSTAM, 0xfffe);
|
|
I915_WRITE16(I915REG_INT_MASK_R, 0x0);
|
|
I915_WRITE16(I915REG_INT_ENABLE_R, 0x0);
|
|
}
|
|
|
|
void i915_driver_irq_postinstall(drm_device_t * dev)
|
|
{
|
|
drm_i915_private_t *dev_priv = (drm_i915_private_t *) dev->dev_private;
|
|
|
|
I915_WRITE16(I915REG_INT_ENABLE_R, USER_INT_FLAG);
|
|
DRM_INIT_WAITQUEUE(&dev_priv->irq_queue);
|
|
}
|
|
|
|
void i915_driver_irq_uninstall(drm_device_t * dev)
|
|
{
|
|
drm_i915_private_t *dev_priv = (drm_i915_private_t *) dev->dev_private;
|
|
if (!dev_priv)
|
|
return;
|
|
|
|
I915_WRITE16(I915REG_HWSTAM, 0xffff);
|
|
I915_WRITE16(I915REG_INT_MASK_R, 0xffff);
|
|
I915_WRITE16(I915REG_INT_ENABLE_R, 0x0);
|
|
}
|