diff options
Diffstat (limited to 'linux-core')
| -rw-r--r-- | linux-core/nouveau_fence.c | 129 |
1 files changed, 129 insertions, 0 deletions
diff --git a/linux-core/nouveau_fence.c b/linux-core/nouveau_fence.c new file mode 100644 index 00000000..e510aec7 --- /dev/null +++ b/linux-core/nouveau_fence.c @@ -0,0 +1,129 @@ +/* + * Copyright (C) 2007 Ben Skeggs. + * 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 THE COPYRIGHT OWNER(S) 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 "nouveau_drv.h" +#include "nouveau_dma.h" + +static int +nouveau_fence_has_irq(struct drm_device *dev, uint32_t class, uint32_t flags) +{ + struct drm_nouveau_private *dev_priv = dev->dev_private; + + DRM_DEBUG("class=%d, flags=0x%08x\n", class, flags); + + /* DRM's channel always uses IRQs to signal fences */ + if (class == dev_priv->channel.chan->id) + return 1; + + /* Other channels don't use IRQs at all yet */ + return 0; +} + +static int +nouveau_fence_emit(struct drm_device *dev, uint32_t class, uint32_t flags, + uint32_t *breadcrumb, uint32_t *native_type) +{ + struct drm_nouveau_private *dev_priv = dev->dev_private; + struct nouveau_channel *chan = dev_priv->fifos[class]; + struct nouveau_drm_channel *dchan = &dev_priv->channel; + + DRM_DEBUG("class=%d, flags=0x%08x\n", class, flags); + + /* We can't emit fences on client channels */ + if (chan != dchan->chan) + return 0; + + *breadcrumb = ++dchan->next_sequence; + *native_type = DRM_FENCE_TYPE_EXE; + + BEGIN_RING(NvSubM2MF, NV_MEMORY_TO_MEMORY_FORMAT_SET_REF, 1); + OUT_RING (*breadcrumb); + BEGIN_RING(NvSubM2MF, NV_MEMORY_TO_MEMORY_FORMAT_NOTIFY, 1); + OUT_RING (NV_MEMORY_TO_MEMORY_FORMAT_NOTIFY_STYLE_WRITE_LE_AWAKEN); + BEGIN_RING(NvSubM2MF, NV_MEMORY_TO_MEMORY_FORMAT_NOP, 1); + OUT_RING (0); + FIRE_RING (); + + return 0; +} + +static void +nouveau_fence_perform_flush(struct drm_device *dev, uint32_t class) +{ + struct drm_nouveau_private *dev_priv = dev->dev_private; + struct drm_fence_class_manager *fc = &dev->fm.fence_class[class]; + uint32_t pending_types = 0; + + DRM_DEBUG("class=%d\n", class); + + pending_types = fc->pending_flush | + ((fc->pending_exe_flush) ? DRM_FENCE_TYPE_EXE : 0); + + if (pending_types) { + uint32_t sequence = NV_READ(NV03_FIFO_REGS(class) + 0x48); + + drm_fence_handler(dev, class, sequence, pending_types, 0); + } +} + +static void +nouveau_fence_poke_flush(struct drm_device *dev, uint32_t class) +{ + struct drm_fence_manager *fm = &dev->fm; + unsigned long flags; + + DRM_DEBUG("class=%d\n", class); + + write_lock_irqsave(&fm->lock, flags); + nouveau_fence_perform_flush(dev, class); + write_unlock_irqrestore(&fm->lock, flags); +} + +void +nouveau_fence_handler(struct drm_device *dev, int channel) +{ + struct drm_fence_manager *fm = &dev->fm; + + DRM_DEBUG("class=%d\n", channel); + + write_lock(&fm->lock); + nouveau_fence_perform_flush(dev, channel); + write_unlock(&fm->lock); +} + +struct drm_fence_driver nouveau_fence_driver = { + .num_classes = 8, + .wrap_diff = (1 << 30), + .flush_diff = (1 << 29), + .sequence_mask = 0xffffffffU, + .lazy_capable = 1, + .has_irq = nouveau_fence_has_irq, + .emit = nouveau_fence_emit, + .poke_flush = nouveau_fence_poke_flush +}; + |