diff options
Diffstat (limited to 'linux-core/via_fence.c')
| -rw-r--r-- | linux-core/via_fence.c | 169 |
1 files changed, 0 insertions, 169 deletions
diff --git a/linux-core/via_fence.c b/linux-core/via_fence.c deleted file mode 100644 index 3a680a32..00000000 --- a/linux-core/via_fence.c +++ /dev/null @@ -1,169 +0,0 @@ -/************************************************************************** - * - * Copyright (c) 2007 Tungsten Graphics, Inc., Cedar Park, TX., 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 <thomas-at-tungstengraphics-dot-com> - */ - -#include "drmP.h" -#include "via_drm.h" -#include "via_drv.h" - -/* - * DRM_FENCE_TYPE_EXE guarantees that all command buffers can be evicted. - * DRM_VIA_FENCE_TYPE_ACCEL guarantees that all 2D & 3D rendering is complete. - */ - -static void via_fence_poll(struct drm_device *dev, uint32_t class, - uint32_t waiting_types) -{ - drm_via_private_t *dev_priv = (drm_via_private_t *) dev->dev_private; - uint32_t signaled_flush_types = 0; - uint32_t status; - - if (class != 0) - return; - - if (unlikely(!dev_priv)) - return; - - spin_lock(&dev_priv->fence_lock); - if (waiting_types) { - - /* - * Take the idlelock. This guarantees that the next time a client tries - * to grab the lock, it will stall until the idlelock is released. This - * guarantees that eventually, the GPU engines will be idle, but nothing - * else. It cannot be used to protect the hardware. - */ - - - if (!dev_priv->have_idlelock) { - drm_idlelock_take(&dev->lock); - dev_priv->have_idlelock = 1; - } - - /* - * Check if AGP command reader is idle. - */ - - if (waiting_types & DRM_FENCE_TYPE_EXE) - if (VIA_READ(0x41C) & 0x80000000) - signaled_flush_types |= DRM_FENCE_TYPE_EXE; - - /* - * Check VRAM command queue empty and 2D + 3D engines idle. - */ - - if (waiting_types & DRM_VIA_FENCE_TYPE_ACCEL) { - status = VIA_READ(VIA_REG_STATUS); - if ((status & VIA_VR_QUEUE_BUSY) && - !(status & (VIA_CMD_RGTR_BUSY | VIA_2D_ENG_BUSY | VIA_3D_ENG_BUSY))) - signaled_flush_types |= DRM_VIA_FENCE_TYPE_ACCEL; - } - - if (signaled_flush_types) { - waiting_types &= ~signaled_flush_types; - if (!waiting_types && dev_priv->have_idlelock) { - drm_idlelock_release(&dev->lock); - dev_priv->have_idlelock = 0; - } - drm_fence_handler(dev, 0, dev_priv->emit_0_sequence, - signaled_flush_types, 0); - } - } - - spin_unlock(&dev_priv->fence_lock); - - return; -} - - -/** - * Emit a fence sequence. - */ - -static int via_fence_emit_sequence(struct drm_device * dev, uint32_t class, uint32_t flags, - uint32_t * sequence, uint32_t * native_type) -{ - drm_via_private_t *dev_priv = (drm_via_private_t *) dev->dev_private; - int ret = 0; - - if (!dev_priv) - return -EINVAL; - - switch(class) { - case 0: /* AGP command stream */ - - /* - * The sequence number isn't really used by the hardware yet. - */ - - spin_lock(&dev_priv->fence_lock); - *sequence = ++dev_priv->emit_0_sequence; - spin_unlock(&dev_priv->fence_lock); - - /* - * When drm_fence_handler() is called with flush type 0x01, and a - * sequence number, That means that the EXE flag is expired. - * Nothing else. No implicit flushing or other engines idle. - */ - - *native_type = DRM_FENCE_TYPE_EXE; - break; - default: - ret = -EINVAL; - break; - } - return ret; -} - -/** - * No irq fence expirations implemented yet. - * Although both the HQV engines and PCI dmablit engines signal - * idle with an IRQ, we haven't implemented this yet. - * This means that the drm fence manager will always poll for engine idle, - * unless the caller wanting to wait for a fence object has indicated a lazy wait. - */ - -static int via_fence_has_irq(struct drm_device * dev, uint32_t class, - uint32_t flags) -{ - return 0; -} - -struct drm_fence_driver via_fence_driver = { - .num_classes = 1, - .wrap_diff = (1 << 30), - .flush_diff = (1 << 20), - .sequence_mask = 0xffffffffU, - .has_irq = via_fence_has_irq, - .emit = via_fence_emit_sequence, - .poll = via_fence_poll, - .needed_flush = NULL, - .wait = NULL -}; |