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