141 lines
3.6 KiB
C
141 lines
3.6 KiB
C
/* drm_dma.c -- DMA IOCTL and function support -*- linux-c -*-
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* Created: Fri Mar 19 14:30:16 1999 by faith@valinux.com
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*/
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/*-
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* Copyright 1999, 2000 Precision Insight, Inc., Cedar Park, Texas.
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* Copyright 2000 VA Linux Systems, Inc., Sunnyvale, California.
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* All Rights Reserved.
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*
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* Permission is hereby granted, free of charge, to any person obtaining a
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* copy of this software and associated documentation files (the "Software"),
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* to deal in the Software without restriction, including without limitation
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* the rights to use, copy, modify, merge, publish, distribute, sublicense,
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* and/or sell copies of the Software, and to permit persons to whom the
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* Software is furnished to do so, subject to the following conditions:
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*
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* The above copyright notice and this permission notice (including the next
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* paragraph) shall be included in all copies or substantial portions of the
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* Software.
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*
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* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
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* IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
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* FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
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* VA LINUX SYSTEMS AND/OR ITS SUPPLIERS BE LIABLE FOR ANY CLAIM, DAMAGES OR
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* OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE,
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* ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR
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* OTHER DEALINGS IN THE SOFTWARE.
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*
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* Authors:
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* Rickard E. (Rik) Faith <faith@valinux.com>
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* Gareth Hughes <gareth@valinux.com>
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*
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*/
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#include <sys/cdefs.h>
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/*
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__FBSDID("$FreeBSD: src/sys/dev/drm/drm_dma.c,v 1.2 2005/11/28 23:13:52 anholt Exp $");
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*/
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#include "drmP.h"
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int drm_dma_setup(drm_device_t *dev)
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{
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dev->dma = malloc(sizeof(*dev->dma), M_DRM, M_NOWAIT | M_ZERO);
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if (dev->dma == NULL)
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return DRM_ERR(ENOMEM);
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DRM_SPININIT(dev->dma_lock, "drmdma");
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return 0;
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}
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void drm_dma_takedown(drm_device_t *dev)
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{
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drm_device_dma_t *dma = dev->dma;
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int i, j;
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if (dma == NULL)
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return;
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/* Clear dma buffers */
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for (i = 0; i <= DRM_MAX_ORDER; i++) {
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if (dma->bufs[i].seg_count) {
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DRM_DEBUG("order %d: buf_count = %d,"
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" seg_count = %d\n",
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i,
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dma->bufs[i].buf_count,
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dma->bufs[i].seg_count);
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for (j = 0; j < dma->bufs[i].seg_count; j++) {
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drm_pci_free(dev, dma->bufs[i].seglist[j]);
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}
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if (dma->bufs[i].seglist)
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free(dma->bufs[i].seglist, M_DRM);
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}
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if (dma->bufs[i].buf_count) {
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for (j = 0; j < dma->bufs[i].buf_count; j++) {
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free(dma->bufs[i].buflist[j].dev_private,
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M_DRM);
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}
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if (dma->bufs[i].buflist)
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free(dma->bufs[i].buflist, M_DRM);
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}
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}
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if (dma->buflist)
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free(dma->buflist, M_DRM);
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if (dma->pagelist)
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free(dma->pagelist, M_DRM);
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if (dev->dma)
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free(dev->dma, M_DRM);
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dev->dma = NULL;
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DRM_SPINUNINIT(dev->dma_lock);
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}
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void drm_free_buffer(drm_device_t *dev, drm_buf_t *buf)
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{
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if (!buf) return;
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buf->pending = 0;
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buf->filp = NULL;
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buf->used = 0;
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}
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void drm_reclaim_buffers(drm_device_t *dev, DRMFILE filp)
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{
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drm_device_dma_t *dma = dev->dma;
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int i;
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if (!dma) return;
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for (i = 0; i < dma->buf_count; i++) {
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if (dma->buflist[i]->filp == filp) {
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switch (dma->buflist[i]->list) {
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case DRM_LIST_NONE:
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drm_free_buffer(dev, dma->buflist[i]);
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break;
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case DRM_LIST_WAIT:
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dma->buflist[i]->list = DRM_LIST_RECLAIM;
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break;
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default:
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/* Buffer already on hardware. */
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break;
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}
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}
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}
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}
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/* Call into the driver-specific DMA handler */
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int drm_dma(DRM_IOCTL_ARGS)
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{
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DRM_DEVICE;
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if (dev->driver.dma_ioctl) {
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return dev->driver.dma_ioctl(kdev, cmd, data, flags, p, filp);
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} else {
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DRM_DEBUG("DMA ioctl on driver with no dma handler\n");
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return EINVAL;
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}
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}
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