freebsd-dev/sys/dev/drm/drm_dma.h
Eric Anholt 1d0d7f3ee4 Update to latest from DRI CVS. Primary new feature is mostly-complete smpng
locking, and the apparently unnecessary locking for -stable has been removed.
This may fix issues with missed interrupts since April, which manifested
themselves as slowdowns or hangs in radeon, in particular. Many cleanups also
took place.  In the shared code, there are improvements to r128 driver
stability.
2003-10-24 01:48:17 +00:00

173 lines
4.6 KiB
C

/* drm_dma.c -- DMA IOCTL and function support -*- linux-c -*-
* Created: Fri Mar 19 14:30:16 1999 by faith@valinux.com
*
* Copyright 1999, 2000 Precision Insight, Inc., Cedar Park, Texas.
* Copyright 2000 VA Linux Systems, Inc., Sunnyvale, California.
* 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
* the rights to use, copy, modify, merge, publish, distribute, sublicense,
* 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 NONINFRINGEMENT. IN NO EVENT SHALL
* VA LINUX SYSTEMS AND/OR ITS 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:
* Rickard E. (Rik) Faith <faith@valinux.com>
* Gareth Hughes <gareth@valinux.com>
*
* $FreeBSD$
*/
#include "dev/drm/drmP.h"
#ifndef __HAVE_DMA_WAITQUEUE
#define __HAVE_DMA_WAITQUEUE 0
#endif
#ifndef __HAVE_DMA_RECLAIM
#define __HAVE_DMA_RECLAIM 0
#endif
#ifndef __HAVE_SHARED_IRQ
#define __HAVE_SHARED_IRQ 0
#endif
#if __HAVE_DMA
int DRM(dma_setup)( drm_device_t *dev )
{
dev->dma = DRM(calloc)(1, sizeof(*dev->dma), DRM_MEM_DRIVER);
if (dev->dma == NULL)
return DRM_ERR(ENOMEM);
DRM_SPININIT(dev->dma_lock, "drmdma");
return 0;
}
void DRM(dma_takedown)(drm_device_t *dev)
{
drm_device_dma_t *dma = dev->dma;
int i, j;
if (dma == NULL)
return;
/* Clear dma buffers */
for (i = 0; i <= DRM_MAX_ORDER; i++) {
#if __HAVE_PCI_DMA
if (dma->bufs[i].seg_count) {
DRM_DEBUG("order %d: buf_count = %d,"
" seg_count = %d\n",
i,
dma->bufs[i].buf_count,
dma->bufs[i].seg_count);
for (j = 0; j < dma->bufs[i].seg_count; j++) {
if (dma->bufs[i].seglist[j] != NULL)
DRM(pci_free)(dev, dma->bufs[i].buf_size,
(void *)dma->bufs[i].seglist[j],
dma->bufs[i].seglist_bus[j]);
}
DRM(free)(dma->bufs[i].seglist,
dma->bufs[i].seg_count
* sizeof(*dma->bufs[0].seglist),
DRM_MEM_SEGS);
DRM(free)(dma->bufs[i].seglist_bus,
dma->bufs[i].seg_count
* sizeof(*dma->bufs[0].seglist_bus),
DRM_MEM_SEGS);
}
#endif /* __HAVE_PCI_DMA */
if (dma->bufs[i].buf_count) {
for (j = 0; j < dma->bufs[i].buf_count; j++) {
DRM(free)(dma->bufs[i].buflist[j].dev_private,
dma->bufs[i].buflist[j].dev_priv_size,
DRM_MEM_BUFS);
}
DRM(free)(dma->bufs[i].buflist,
dma->bufs[i].buf_count *
sizeof(*dma->bufs[0].buflist),
DRM_MEM_BUFS);
}
}
DRM(free)(dma->buflist, dma->buf_count * sizeof(*dma->buflist),
DRM_MEM_BUFS);
DRM(free)(dma->pagelist, dma->page_count * sizeof(*dma->pagelist),
DRM_MEM_PAGES);
DRM(free)(dev->dma, sizeof(*dev->dma), DRM_MEM_DRIVER);
dev->dma = NULL;
DRM_SPINUNINIT(dev->dma_lock);
}
void DRM(free_buffer)(drm_device_t *dev, drm_buf_t *buf)
{
if (!buf) return;
buf->pending = 0;
buf->filp = NULL;
buf->used = 0;
}
#if !__HAVE_DMA_RECLAIM
void DRM(reclaim_buffers)(drm_device_t *dev, DRMFILE filp)
{
drm_device_dma_t *dma = dev->dma;
int i;
if (!dma) return;
for (i = 0; i < dma->buf_count; i++) {
if (dma->buflist[i]->filp == filp) {
switch (dma->buflist[i]->list) {
case DRM_LIST_NONE:
DRM(free_buffer)(dev, dma->buflist[i]);
break;
case DRM_LIST_WAIT:
dma->buflist[i]->list = DRM_LIST_RECLAIM;
break;
default:
/* Buffer already on hardware. */
break;
}
}
}
}
#endif
#if !__HAVE_IRQ
/* This stub DRM_IOCTL_CONTROL handler is for the drivers that used to require
* IRQs for DMA but no longer do. It maintains compatibility with the X Servers
* that try to use the control ioctl by simply returning success.
*/
int DRM(control)( DRM_IOCTL_ARGS )
{
drm_control_t ctl;
DRM_COPY_FROM_USER_IOCTL( ctl, (drm_control_t *) data, sizeof(ctl) );
switch ( ctl.func ) {
case DRM_INST_HANDLER:
case DRM_UNINST_HANDLER:
return 0;
default:
return DRM_ERR(EINVAL);
}
}
#endif
#endif /* __HAVE_DMA */