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/*
* 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>
*
*/
/*
* Copyright 2008 Sun Microsystems, Inc. All rights reserved.
* Use is subject to license terms.
*/
#pragma ident "%Z%%M% %I% %E% SMI"
#include "drmP.h"
int
drm_dma_setup(drm_device_t *dev)
{
int i;
drm_buf_entry_t *pbuf;
dev->dma = drm_calloc(1, sizeof (*dev->dma), DRM_MEM_DMA);
if (dev->dma == NULL)
return (ENOMEM);
mutex_init(&dev->dma_lock, NULL, MUTEX_DRIVER, NULL);
pbuf = &(dev->dma->bufs[0]);
for (i = 0; i <= DRM_MAX_ORDER; i++, pbuf++)
bzero(pbuf, sizeof (drm_buf_entry_t));
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 (dma->bufs[i].seg_count) {
drm_free(dma->bufs[i].seglist,
dma->bufs[i].seg_count *
sizeof (*dma->bufs[0].seglist), DRM_MEM_SEGS);
}
for (j = 0; j < dma->bufs[i].buf_count; j++) {
if (dma->bufs[i].buflist[j].dev_private) {
drm_free(dma->bufs[i].buflist[j].dev_private,
dma->bufs[i].buflist[j].dev_priv_size,
DRM_MEM_BUFS);
}
}
if (dma->bufs[i].buf_count)
drm_free(dma->bufs[i].buflist,
dma->bufs[i].buf_count *
sizeof (*dma->bufs[0].buflist), DRM_MEM_BUFS);
}
if (dma->buflist) {
drm_free(dma->buflist,
dma->buf_count *sizeof (*dma->buflist),
DRM_MEM_BUFS);
}
if (dma->pagelist) {
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;
mutex_destroy(&dev->dma_lock);
}
/*ARGSUSED*/
void
drm_free_buffer(drm_device_t *dev, drm_buf_t *buf)
{
if (!buf)
return;
buf->pending = 0;
buf->filp = NULL;
buf->used = 0;
}
void
drm_reclaim_buffers(drm_device_t *dev, drm_file_t *fpriv)
{
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 == fpriv) {
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;
}
}
}
}
/* Call into the driver-specific DMA handler */
int
drm_dma(DRM_IOCTL_ARGS)
{
DRM_DEVICE;
if (dev->driver->dma_ioctl) {
return (dev->driver->dma_ioctl(dev, data, fpriv, mode));
} else {
return (EINVAL);
}
}
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