100 lines
2.8 KiB
C
100 lines
2.8 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 int xgi_low_level_fence_emit(struct drm_device *dev, u32 *sequence)
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{
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struct xgi_info *const info = dev->dev_private;
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if (info == NULL) {
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DRM_ERROR("called with no initialization\n");
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return -EINVAL;
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}
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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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*sequence = (u32) info->next_sequence;
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DRM_SPINUNLOCK(&info->fence_lock);
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xgi_emit_irq(info);
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return 0;
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}
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#define GET_BEGIN_ID(i) (le32_to_cpu(DRM_READ32((i)->mmio_map, 0x2820)) \
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& BEGIN_BEGIN_IDENTIFICATION_MASK)
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static int xgi_low_level_fence_wait(struct drm_device *dev, unsigned *sequence)
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{
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struct xgi_info *const info = dev->dev_private;
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unsigned int cur_fence;
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int ret = 0;
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if (info == NULL) {
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DRM_ERROR("called with no initialization\n");
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return -EINVAL;
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}
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/* Assume that the user has missed the current sequence number
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* by about a day rather than she wants to wait for years
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* using fences.
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*/
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DRM_WAIT_ON(ret, info->fence_queue, 3 * DRM_HZ,
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((((cur_fence = GET_BEGIN_ID(info))
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- *sequence) & BEGIN_BEGIN_IDENTIFICATION_MASK)
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<= (1 << 18)));
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info->complete_sequence = cur_fence;
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*sequence = cur_fence;
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return ret;
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}
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int xgi_set_fence_ioctl(struct drm_device * dev, void * data,
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struct drm_file * filp)
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{
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(void) filp;
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return xgi_low_level_fence_emit(dev, (u32 *) data);
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}
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int xgi_wait_fence_ioctl(struct drm_device * dev, void * data,
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struct drm_file * filp)
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{
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(void) filp;
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return xgi_low_level_fence_wait(dev, (u32 *) data);
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}
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