123 lines
3.3 KiB
C
123 lines
3.3 KiB
C
/*
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* (C) Copyright IBM Corporation 2007
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* All Rights Reserved.
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*
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* Permission is hereby granted, free of charge, to any person obtaining a
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* copy of this software and associated documentation files (the "Software"),
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* to deal in the Software without restriction, including without limitation
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* on the rights to use, copy, modify, merge, publish, distribute, sub
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* license, and/or sell copies of the Software, and to permit persons to whom
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* the Software is furnished to do so, subject to the following conditions:
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*
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* The above copyright notice and this permission notice (including the next
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* paragraph) shall be included in all copies or substantial portions of the
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* Software.
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*
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* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
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* IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
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* FITNESS FOR A PARTICULAR PURPOSE AND NON-INFRINGEMENT. IN NO EVENT SHALL
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* THE AUTHORS AND/OR THEIR SUPPLIERS BE LIABLE FOR ANY CLAIM, DAMAGES OR
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* OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE,
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* ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR
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* OTHER DEALINGS IN THE SOFTWARE.
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*
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* Authors:
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* Ian Romanick <idr@us.ibm.com>
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*/
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#include "xgi_drv.h"
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#include "xgi_regs.h"
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#include "xgi_misc.h"
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#include "xgi_cmdlist.h"
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static void xgi_fence_poll(struct drm_device * dev, uint32_t class,
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uint32_t waiting_types)
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{
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struct xgi_info * info = dev->dev_private;
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uint32_t signaled_types = 0;
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if ((info == NULL) || (class != 0))
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return;
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DRM_SPINLOCK(&info->fence_lock);
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if (waiting_types) {
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if (waiting_types & DRM_FENCE_TYPE_EXE) {
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const u32 begin_id = le32_to_cpu(DRM_READ32(info->mmio_map,
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0x2820))
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& BEGIN_BEGIN_IDENTIFICATION_MASK;
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if (begin_id != info->complete_sequence) {
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info->complete_sequence = begin_id;
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signaled_types |= DRM_FENCE_TYPE_EXE;
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}
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}
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if (signaled_types) {
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drm_fence_handler(dev, 0, info->complete_sequence,
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signaled_types, 0);
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}
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}
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DRM_SPINUNLOCK(&info->fence_lock);
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}
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int xgi_fence_emit_sequence(struct drm_device * dev, uint32_t class,
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uint32_t flags, uint32_t * sequence,
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uint32_t * native_type)
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{
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struct xgi_info * info = dev->dev_private;
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if ((info == NULL) || (class != 0))
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return -EINVAL;
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DRM_SPINLOCK(&info->fence_lock);
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info->next_sequence++;
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if (info->next_sequence > BEGIN_BEGIN_IDENTIFICATION_MASK) {
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info->next_sequence = 1;
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}
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DRM_SPINUNLOCK(&info->fence_lock);
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xgi_emit_irq(info);
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*sequence = (uint32_t) info->next_sequence;
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*native_type = DRM_FENCE_TYPE_EXE;
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return 0;
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}
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void xgi_fence_handler(struct drm_device * dev)
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{
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struct drm_fence_manager * fm = &dev->fm;
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struct drm_fence_class_manager *fc = &fm->fence_class[0];
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write_lock(&fm->lock);
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xgi_fence_poll(dev, 0, fc->waiting_types);
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write_unlock(&fm->lock);
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}
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int xgi_fence_has_irq(struct drm_device *dev, uint32_t class, uint32_t flags)
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{
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return ((class == 0) && (flags == DRM_FENCE_TYPE_EXE)) ? 1 : 0;
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}
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struct drm_fence_driver xgi_fence_driver = {
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.num_classes = 1,
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.wrap_diff = BEGIN_BEGIN_IDENTIFICATION_MASK,
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.flush_diff = BEGIN_BEGIN_IDENTIFICATION_MASK - 1,
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.sequence_mask = BEGIN_BEGIN_IDENTIFICATION_MASK,
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.has_irq = xgi_fence_has_irq,
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.emit = xgi_fence_emit_sequence,
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.flush = NULL,
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.poll = xgi_fence_poll,
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.needed_flush = NULL,
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.wait = NULL
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};
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