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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);
}
#ifdef XGI_HAVE_FENCE
static void xgi_fence_poll(struct drm_device * dev, uint32_t class,
uint32_t waiting_types)
{
struct xgi_info * info = dev->dev_private;
uint32_t signaled_types = 0;
if ((info == NULL) || (class != 0))
return;
DRM_SPINLOCK(&info->fence_lock);
if (waiting_types) {
if (waiting_types & DRM_FENCE_TYPE_EXE) {
const u32 begin_id = le32_to_cpu(DRM_READ32(info->mmio_map,
0x2820))
& BEGIN_BEGIN_IDENTIFICATION_MASK;
if (begin_id != info->complete_sequence) {
info->complete_sequence = begin_id;
signaled_types |= DRM_FENCE_TYPE_EXE;
}
}
if (signaled_types) {
drm_fence_handler(dev, 0, info->complete_sequence,
signaled_types, 0);
}
}
DRM_SPINUNLOCK(&info->fence_lock);
}
int xgi_fence_emit_sequence(struct drm_device * dev, uint32_t class,
uint32_t flags, uint32_t * sequence,
uint32_t * native_type)
{
int err;
(void) flags;
if (class != 0)
return -EINVAL;
err = xgi_low_level_fence_emit(dev, sequence);
if (err)
return err;
*native_type = DRM_FENCE_TYPE_EXE;
return 0;
}
void xgi_fence_handler(struct drm_device * dev)
{
struct drm_fence_manager * fm = &dev->fm;
struct drm_fence_class_manager *fc = &fm->fence_class[0];
write_lock(&fm->lock);
xgi_fence_poll(dev, 0, fc->waiting_types);
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;
}
struct drm_fence_driver xgi_fence_driver = {
.num_classes = 1,
.wrap_diff = BEGIN_BEGIN_IDENTIFICATION_MASK,
.flush_diff = BEGIN_BEGIN_IDENTIFICATION_MASK - 1,
.sequence_mask = BEGIN_BEGIN_IDENTIFICATION_MASK,
.has_irq = xgi_fence_has_irq,
.emit = xgi_fence_emit_sequence,
.flush = NULL,
.poll = xgi_fence_poll,
.needed_flush = NULL,
.wait = NULL
};
#endif /* XGI_HAVE_FENCE */
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