1450N/A/*
1450N/A * Copyright (c) 2006, 2011, Oracle and/or its affiliates. All rights reserved.
1450N/A */
1450N/A
1450N/A/*
1450N/A * drm_dma.c -- DMA IOCTL and function support -*- linux-c -*-
1450N/A * Created: Fri Mar 19 14:30:16 1999 by faith@valinux.com
1450N/A */
1450N/A/*
1450N/A * Copyright 1999, 2000 Precision Insight, Inc., Cedar Park, Texas.
1450N/A * Copyright 2000 VA Linux Systems, Inc., Sunnyvale, California.
1450N/A * All Rights Reserved.
1450N/A *
1450N/A * Permission is hereby granted, free of charge, to any person obtaining a
1450N/A * copy of this software and associated documentation files (the "Software"),
1450N/A * to deal in the Software without restriction, including without limitation
1450N/A * the rights to use, copy, modify, merge, publish, distribute, sublicense,
1450N/A * and/or sell copies of the Software, and to permit persons to whom the
1450N/A * Software is furnished to do so, subject to the following conditions:
1450N/A *
1450N/A * The above copyright notice and this permission notice (including the next
1450N/A * paragraph) shall be included in all copies or substantial portions of the
1450N/A * Software.
1450N/A *
1450N/A * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
1450N/A * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
1450N/A * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
1450N/A * VA LINUX SYSTEMS AND/OR ITS SUPPLIERS BE LIABLE FOR ANY CLAIM, DAMAGES OR
1450N/A * OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE,
1450N/A * ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR
1450N/A * OTHER DEALINGS IN THE SOFTWARE.
1450N/A *
1450N/A * Authors:
1450N/A * Rickard E. (Rik) Faith <faith@valinux.com>
1450N/A * Gareth Hughes <gareth@valinux.com>
1450N/A *
1450N/A */
1450N/A
1450N/A#include "drmP.h"
1450N/A
1450N/Aint
1450N/Adrm_dma_setup(drm_device_t *dev)
1450N/A{
1450N/A int i;
1450N/A drm_buf_entry_t *pbuf;
1450N/A
1450N/A dev->dma = drm_calloc(1, sizeof (*dev->dma), DRM_MEM_DMA);
1450N/A if (dev->dma == NULL)
1450N/A return (ENOMEM);
1450N/A
1450N/A mutex_init(&dev->dma_lock, NULL, MUTEX_DRIVER, NULL);
1450N/A pbuf = &(dev->dma->bufs[0]);
1450N/A for (i = 0; i <= DRM_MAX_ORDER; i++, pbuf++)
1450N/A bzero(pbuf, sizeof (drm_buf_entry_t));
1450N/A
1450N/A return (0);
1450N/A}
1450N/A
1450N/Avoid
1450N/Adrm_dma_takedown(drm_device_t *dev)
1450N/A{
1450N/A drm_device_dma_t *dma = dev->dma;
1450N/A int i, j;
1450N/A
1450N/A if (dma == NULL)
1450N/A return;
1450N/A
1450N/A /* Clear dma buffers */
1450N/A for (i = 0; i <= DRM_MAX_ORDER; i++) {
1450N/A if (dma->bufs[i].seg_count) {
1450N/A drm_free(dma->bufs[i].seglist,
1450N/A dma->bufs[i].seg_count *
1450N/A sizeof (*dma->bufs[0].seglist), DRM_MEM_SEGS);
1450N/A }
1450N/A
1450N/A for (j = 0; j < dma->bufs[i].buf_count; j++) {
1450N/A if (dma->bufs[i].buflist[j].dev_private) {
1450N/A drm_free(dma->bufs[i].buflist[j].dev_private,
1450N/A dma->bufs[i].buflist[j].dev_priv_size,
1450N/A DRM_MEM_BUFS);
1450N/A }
1450N/A }
1450N/A if (dma->bufs[i].buf_count)
1450N/A drm_free(dma->bufs[i].buflist,
1450N/A dma->bufs[i].buf_count *
1450N/A sizeof (*dma->bufs[0].buflist), DRM_MEM_BUFS);
1450N/A }
1450N/A if (dma->buflist) {
1450N/A drm_free(dma->buflist,
1450N/A dma->buf_count *sizeof (*dma->buflist),
1450N/A DRM_MEM_BUFS);
1450N/A }
1450N/A
1450N/A if (dma->pagelist) {
1450N/A drm_free(dma->pagelist,
1450N/A dma->page_count *sizeof (*dma->pagelist),
1450N/A DRM_MEM_PAGES);
1450N/A }
1450N/A
1450N/A drm_free(dev->dma, sizeof (*dev->dma), DRM_MEM_DRIVER);
1450N/A dev->dma = NULL;
1450N/A mutex_destroy(&dev->dma_lock);
1450N/A}
1450N/A
1450N/A
1450N/A/*ARGSUSED*/
1450N/Avoid
1450N/Adrm_free_buffer(drm_device_t *dev, drm_buf_t *buf)
1450N/A{
1450N/A if (!buf)
1450N/A return;
1450N/A
1450N/A buf->pending = 0;
1450N/A buf->filp = NULL;
1450N/A buf->used = 0;
1450N/A}
1450N/A
1450N/Avoid
1450N/Adrm_reclaim_buffers(drm_device_t *dev, drm_file_t *fpriv)
1450N/A{
1450N/A drm_device_dma_t *dma = dev->dma;
1450N/A int i;
1450N/A
1450N/A if (!dma)
1450N/A return;
1450N/A for (i = 0; i < dma->buf_count; i++) {
1450N/A if (dma->buflist[i]->filp == fpriv) {
1450N/A switch (dma->buflist[i]->list) {
1450N/A case DRM_LIST_NONE:
1450N/A drm_free_buffer(dev, dma->buflist[i]);
1450N/A break;
1450N/A case DRM_LIST_WAIT:
1450N/A dma->buflist[i]->list = DRM_LIST_RECLAIM;
1450N/A break;
1450N/A default:
1450N/A /* Buffer already on hardware. */
1450N/A break;
1450N/A }
1450N/A }
1450N/A }
1450N/A}
1450N/A
1450N/A/* Call into the driver-specific DMA handler */
1450N/Aint
1450N/Adrm_dma(DRM_IOCTL_ARGS)
1450N/A{
1450N/A DRM_DEVICE;
1450N/A
1450N/A if (dev->driver->dma_ioctl) {
1450N/A return (dev->driver->dma_ioctl(dev, data, fpriv, mode));
1450N/A } else {
1450N/A return (EINVAL);
1450N/A }
1450N/A}