diff options
| -rw-r--r-- | linux-core/xgi_fence.c | 125 |
1 files changed, 125 insertions, 0 deletions
diff --git a/linux-core/xgi_fence.c b/linux-core/xgi_fence.c new file mode 100644 index 00000000..e5b545de --- /dev/null +++ b/linux-core/xgi_fence.c @@ -0,0 +1,125 @@ +/* + * (C) Copyright IBM Corporation 2007 + * 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 + * on 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 + * THE AUTHORS AND/OR THEIR 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. + * + * Authors: + * Ian Romanick <idr@us.ibm.com> + */ + +#include "xgi_drv.h" +#include "xgi_regs.h" +#include "xgi_misc.h" +#include "xgi_cmdlist.h" + +static uint32_t xgi_do_flush(struct drm_device * dev, uint32_t class) +{ + struct xgi_info * info = dev->dev_private; + struct drm_fence_class_manager * fc = &dev->fm.class[class]; + uint32_t pending_flush_types = 0; + uint32_t signaled_flush_types = 0; + + + if ((info == NULL) || (class != 0)) + return 0; + + spin_lock(&info->fence_lock); + + pending_flush_types = fc->pending_flush | + ((fc->pending_exe_flush) ? DRM_FENCE_TYPE_EXE : 0); + + if (pending_flush_types) { + if (pending_flush_types & DRM_FENCE_TYPE_EXE) { + const u32 begin_id = DRM_READ32(info->mmio_map, + 0x2820) + & BEGIN_BEGIN_IDENTIFICATION_MASK; + + if (begin_id != info->complete_sequence) { + info->complete_sequence = begin_id; + signaled_flush_types |= DRM_FENCE_TYPE_EXE; + } + } + + if (signaled_flush_types) { + drm_fence_handler(dev, 0, info->complete_sequence, + signaled_flush_types); + } + } + + spin_unlock(&info->fence_lock); + + return fc->pending_flush | + ((fc->pending_exe_flush) ? DRM_FENCE_TYPE_EXE : 0); +} + + +int xgi_fence_emit_sequence(struct drm_device * dev, uint32_t class, + uint32_t flags, uint32_t * sequence, + uint32_t * native_type) +{ + struct xgi_info * info = dev->dev_private; + + if ((info == NULL) || (class != 0)) + return -EINVAL; + + + spin_lock(&info->fence_lock); + info->next_sequence++; + if (info->next_sequence > BEGIN_BEGIN_IDENTIFICATION_MASK) { + info->next_sequence = 1; + } + spin_unlock(&info->fence_lock); + + + *sequence = (uint32_t) info->next_sequence; + *native_type = DRM_FENCE_TYPE_EXE; + + return 0; +} + + +void xgi_poke_flush(struct drm_device * dev, uint32_t class) +{ + struct drm_fence_manager * fm = &dev->fm; + unsigned long flags; + + + write_lock_irqsave(&fm->lock, flags); + xgi_do_flush(dev, class); + write_unlock_irqrestore(&fm->lock, flags); +} + + +void xgi_fence_handler(struct drm_device * dev) +{ + struct drm_fence_manager * fm = &dev->fm; + + + write_lock(&fm->lock); + xgi_do_flush(dev, 0); + write_unlock(&fm->lock); +} + + +int xgi_fence_has_irq(struct drm_device *dev, uint32_t class, uint32_t flags) +{ + return ((class == 0) && (flags == DRM_FENCE_TYPE_EXE)) ? 1 : 0; +} |