/************************************************************************** * * Copyright 2006 Tungsten Graphics, Inc., Bismarck, ND., USA * 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 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 * THE COPYRIGHT HOLDERS, AUTHORS 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. * * The above copyright notice and this permission notice (including the * next paragraph) shall be included in all copies or substantial portions * of the Software. * * **************************************************************************/ /* * Authors: Thomas Hellström */ #include "drmP.h" #include "drm.h" #include "i915_drm.h" #include "i915_drv.h" /* * Implements an intel sync flush operation. */ static void i915_perform_flush(drm_device_t * dev) { drm_i915_private_t *dev_priv = (drm_i915_private_t *) dev->dev_private; drm_fence_manager_t *fm = &dev->fm; drm_fence_driver_t *driver = dev->driver->fence_driver; int flush_completed = 0; uint32_t flush_flags = 0; uint32_t flush_sequence = 0; uint32_t i_status; uint32_t diff; uint32_t sequence; if (fm->pending_exe_flush) { sequence = READ_BREADCRUMB(dev_priv); diff = sequence - fm->last_exe_flush; if (diff < driver->wrap_diff && diff != 0) { drm_fence_handler(dev, sequence, DRM_FENCE_EXE); } diff = sequence - fm->exe_flush_sequence; if (diff < driver->wrap_diff) { fm->pending_exe_flush = 0; if (dev_priv->fence_irq_on) { i915_user_irq_off(dev_priv); dev_priv->fence_irq_on = 0; } } else if (!dev_priv->fence_irq_on) { i915_user_irq_on(dev_priv); dev_priv->fence_irq_on = 1; } } if (dev_priv->flush_pending) { i_status = READ_HWSP(dev_priv, 0); if ((i_status & (1 << 12)) != (dev_priv->saved_flush_status & (1 << 12))) { flush_completed = 1; flush_flags = dev_priv->flush_flags; flush_sequence = dev_priv->flush_sequence; dev_priv->flush_pending = 0; } else { } } if (flush_completed) { drm_fence_handler(dev, flush_sequence, flush_flags); } if (fm->pending_flush && !dev_priv->flush_pending) { dev_priv->flush_sequence = (uint32_t) READ_BREADCRUMB(dev_priv); dev_priv->flush_flags = fm->pending_flush; dev_priv->saved_flush_status = READ_HWSP(dev_priv, 0); I915_WRITE(I915REG_INSTPM, (1 << 5) | (1 << 21)); dev_priv->flush_pending = 1; fm->pending_flush = 0; } } void i915_poke_flush(drm_device_t * dev) { drm_fence_manager_t *fm = &dev->fm; unsigned long flags; write_lock_irqsave(&fm->lock, flags); i915_perform_flush(dev); write_unlock_irqrestore(&fm->lock, flags); } int i915_fence_emit_sequence(drm_device_t * dev, uint32_t * sequence) { drm_i915_private_t *dev_priv = (drm_i915_private_t *) dev->dev_private; i915_emit_irq(dev); *sequence = (uint32_t) dev_priv->counter; return 0; } void i915_fence_handler(drm_device_t * dev) { drm_fence_manager_t *fm = &dev->fm; write_lock(&fm->lock); i915_perform_flush(dev); i915_perform_flush(dev); write_unlock(&fm->lock); }