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/*-
* 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>
*
*/
/** @file drm_dma.c
* Support code for DMA buffer management.
*
* The implementation used to be significantly more complicated, but the
* complexity has been moved into the drivers as different buffer management
* schemes evolved.
*/
#include "drmP.h"
int
drm_dma_setup(struct drm_device *dev)
{
dev->dma = drm_calloc(1, sizeof(*dev->dma), DRM_MEM_DRIVER);
if (dev->dma == NULL)
return ENOMEM;
dev->buf_use = 0;
DRM_SPININIT(&dev->dma_lock, "drmdma");
return 0;
}
void
drm_cleanup_buf(struct drm_device *dev, drm_buf_entry_t *entry)
{
int i;
if (entry->seg_count) {
for (i = 0; i < entry->seg_count; i++)
drm_pci_free(dev->pa.pa_dmat, entry->seglist[i]);
drm_free(entry->seglist, entry->seg_count *
sizeof(*entry->seglist), DRM_MEM_BUFS);
entry->seg_count = 0;
}
if (entry->buf_count) {
for (i = 0; i < entry->buf_count; i++) {
drm_free(entry->buflist[i].dev_private,
dev->driver->buf_priv_size, DRM_MEM_BUFS);
}
drm_free(entry->buflist, entry->buf_count *
sizeof(*entry->buflist), DRM_MEM_BUFS);
entry->buf_count = 0;
}
}
void
drm_dma_takedown(struct drm_device *dev)
{
drm_device_dma_t *dma = dev->dma;
int i;
if (dma == NULL)
return;
/* Clear dma buffers */
for (i = 0; i <= DRM_MAX_ORDER; i++)
drm_cleanup_buf(dev, &dma->bufs[i]);
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_BUFS);
drm_free(dev->dma, sizeof(*dev->dma), DRM_MEM_DMA);
dev->dma = NULL;
DRM_SPINUNINIT(&dev->dma_lock);
}
void
drm_free_buffer(struct drm_device *dev, drm_buf_t *buf)
{
if (buf == NULL)
return;
buf->pending = 0;
buf->file_priv= NULL;
buf->used = 0;
}
void
drm_reclaim_buffers(struct drm_device *dev, struct drm_file *file_priv)
{
drm_device_dma_t *dma = dev->dma;
int i;
if (dma == NULL)
return;
for (i = 0; i < dma->buf_count; i++) {
if (dma->buflist[i]->file_priv == file_priv)
drm_free_buffer(dev, dma->buflist[i]);
}
}
/* Call into the driver-specific DMA handler */
int
drm_dma(struct drm_device *dev, void *data, struct drm_file *file_priv)
{
if (dev->driver->dma_ioctl != NULL) {
return (dev->driver->dma_ioctl(dev, data, file_priv));
} else {
DRM_DEBUG("DMA ioctl on driver with no dma handler\n");
return EINVAL;
}
}
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