diff options
Diffstat (limited to 'nx-X11/extras/drm/shared-core/i915_irq.c')
| -rw-r--r-- | nx-X11/extras/drm/shared-core/i915_irq.c | 181 |
1 files changed, 181 insertions, 0 deletions
diff --git a/nx-X11/extras/drm/shared-core/i915_irq.c b/nx-X11/extras/drm/shared-core/i915_irq.c new file mode 100644 index 000000000..1b7b2a38e --- /dev/null +++ b/nx-X11/extras/drm/shared-core/i915_irq.c @@ -0,0 +1,181 @@ +/* i915_irq.c -- IRQ support for the I915 -*- linux-c -*- + */ +/************************************************************************** + * + * Copyright 2003 Tungsten Graphics, Inc., Cedar Park, Texas. + * 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, sub license, 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 NON-INFRINGEMENT. + * 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. + * + **************************************************************************/ + +#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; +} + +static 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; +} + +static 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); +} |