60405de4d8688d96dd05157c28db3ade5c9bc234kz/*
60405de4d8688d96dd05157c28db3ade5c9bc234kz * drm_dma.c -- DMA IOCTL and function support -*- linux-c -*-
60405de4d8688d96dd05157c28db3ade5c9bc234kz * Created: Fri Mar 19 14:30:16 1999 by faith@valinux.com
60405de4d8688d96dd05157c28db3ade5c9bc234kz */
60405de4d8688d96dd05157c28db3ade5c9bc234kz/*
60405de4d8688d96dd05157c28db3ade5c9bc234kz * Copyright 1999, 2000 Precision Insight, Inc., Cedar Park, Texas.
60405de4d8688d96dd05157c28db3ade5c9bc234kz * Copyright 2000 VA Linux Systems, Inc., Sunnyvale, California.
60405de4d8688d96dd05157c28db3ade5c9bc234kz * All Rights Reserved.
60405de4d8688d96dd05157c28db3ade5c9bc234kz *
60405de4d8688d96dd05157c28db3ade5c9bc234kz * Permission is hereby granted, free of charge, to any person obtaining a
60405de4d8688d96dd05157c28db3ade5c9bc234kz * copy of this software and associated documentation files (the "Software"),
60405de4d8688d96dd05157c28db3ade5c9bc234kz * to deal in the Software without restriction, including without limitation
60405de4d8688d96dd05157c28db3ade5c9bc234kz * the rights to use, copy, modify, merge, publish, distribute, sublicense,
60405de4d8688d96dd05157c28db3ade5c9bc234kz * and/or sell copies of the Software, and to permit persons to whom the
60405de4d8688d96dd05157c28db3ade5c9bc234kz * Software is furnished to do so, subject to the following conditions:
60405de4d8688d96dd05157c28db3ade5c9bc234kz *
60405de4d8688d96dd05157c28db3ade5c9bc234kz * The above copyright notice and this permission notice (including the next
60405de4d8688d96dd05157c28db3ade5c9bc234kz * paragraph) shall be included in all copies or substantial portions of the
60405de4d8688d96dd05157c28db3ade5c9bc234kz * Software.
60405de4d8688d96dd05157c28db3ade5c9bc234kz *
60405de4d8688d96dd05157c28db3ade5c9bc234kz * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
60405de4d8688d96dd05157c28db3ade5c9bc234kz * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
60405de4d8688d96dd05157c28db3ade5c9bc234kz * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
60405de4d8688d96dd05157c28db3ade5c9bc234kz * VA LINUX SYSTEMS AND/OR ITS SUPPLIERS BE LIABLE FOR ANY CLAIM, DAMAGES OR
60405de4d8688d96dd05157c28db3ade5c9bc234kz * OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE,
60405de4d8688d96dd05157c28db3ade5c9bc234kz * ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR
60405de4d8688d96dd05157c28db3ade5c9bc234kz * OTHER DEALINGS IN THE SOFTWARE.
60405de4d8688d96dd05157c28db3ade5c9bc234kz *
60405de4d8688d96dd05157c28db3ade5c9bc234kz * Authors:
60405de4d8688d96dd05157c28db3ade5c9bc234kz * Rickard E. (Rik) Faith <faith@valinux.com>
60405de4d8688d96dd05157c28db3ade5c9bc234kz * Gareth Hughes <gareth@valinux.com>
60405de4d8688d96dd05157c28db3ade5c9bc234kz *
60405de4d8688d96dd05157c28db3ade5c9bc234kz */
60405de4d8688d96dd05157c28db3ade5c9bc234kz
e92e3a8694f157faf8a9e44096a70ada86c556bfzw/*
d0538f66491267879b7418b21ad78e3dcc2dcc83cg * Copyright 2008 Sun Microsystems, Inc. All rights reserved.
e92e3a8694f157faf8a9e44096a70ada86c556bfzw * Use is subject to license terms.
e92e3a8694f157faf8a9e44096a70ada86c556bfzw */
e92e3a8694f157faf8a9e44096a70ada86c556bfzw
60405de4d8688d96dd05157c28db3ade5c9bc234kz#pragma ident "%Z%%M% %I% %E% SMI"
60405de4d8688d96dd05157c28db3ade5c9bc234kz
60405de4d8688d96dd05157c28db3ade5c9bc234kz#include "drmP.h"
60405de4d8688d96dd05157c28db3ade5c9bc234kz
60405de4d8688d96dd05157c28db3ade5c9bc234kzint
60405de4d8688d96dd05157c28db3ade5c9bc234kzdrm_dma_setup(drm_device_t *dev)
60405de4d8688d96dd05157c28db3ade5c9bc234kz{
60405de4d8688d96dd05157c28db3ade5c9bc234kz int i;
d0538f66491267879b7418b21ad78e3dcc2dcc83cg drm_buf_entry_t *pbuf;
60405de4d8688d96dd05157c28db3ade5c9bc234kz
60405de4d8688d96dd05157c28db3ade5c9bc234kz dev->dma = drm_calloc(1, sizeof (*dev->dma), DRM_MEM_DMA);
60405de4d8688d96dd05157c28db3ade5c9bc234kz if (dev->dma == NULL)
d0538f66491267879b7418b21ad78e3dcc2dcc83cg return (ENOMEM);
60405de4d8688d96dd05157c28db3ade5c9bc234kz
60405de4d8688d96dd05157c28db3ade5c9bc234kz mutex_init(&dev->dma_lock, NULL, MUTEX_DRIVER, NULL);
d0538f66491267879b7418b21ad78e3dcc2dcc83cg pbuf = &(dev->dma->bufs[0]);
d0538f66491267879b7418b21ad78e3dcc2dcc83cg for (i = 0; i <= DRM_MAX_ORDER; i++, pbuf++)
d0538f66491267879b7418b21ad78e3dcc2dcc83cg bzero(pbuf, sizeof (drm_buf_entry_t));
60405de4d8688d96dd05157c28db3ade5c9bc234kz
60405de4d8688d96dd05157c28db3ade5c9bc234kz return (0);
60405de4d8688d96dd05157c28db3ade5c9bc234kz}
60405de4d8688d96dd05157c28db3ade5c9bc234kz
60405de4d8688d96dd05157c28db3ade5c9bc234kzvoid
60405de4d8688d96dd05157c28db3ade5c9bc234kzdrm_dma_takedown(drm_device_t *dev)
60405de4d8688d96dd05157c28db3ade5c9bc234kz{
60405de4d8688d96dd05157c28db3ade5c9bc234kz drm_device_dma_t *dma = dev->dma;
60405de4d8688d96dd05157c28db3ade5c9bc234kz int i, j;
60405de4d8688d96dd05157c28db3ade5c9bc234kz
60405de4d8688d96dd05157c28db3ade5c9bc234kz if (dma == NULL)
60405de4d8688d96dd05157c28db3ade5c9bc234kz return;
60405de4d8688d96dd05157c28db3ade5c9bc234kz
60405de4d8688d96dd05157c28db3ade5c9bc234kz /* Clear dma buffers */
60405de4d8688d96dd05157c28db3ade5c9bc234kz for (i = 0; i <= DRM_MAX_ORDER; i++) {
60405de4d8688d96dd05157c28db3ade5c9bc234kz if (dma->bufs[i].seg_count) {
60405de4d8688d96dd05157c28db3ade5c9bc234kz drm_free(dma->bufs[i].seglist,
60405de4d8688d96dd05157c28db3ade5c9bc234kz dma->bufs[i].seg_count *
60405de4d8688d96dd05157c28db3ade5c9bc234kz sizeof (*dma->bufs[0].seglist), DRM_MEM_SEGS);
60405de4d8688d96dd05157c28db3ade5c9bc234kz }
60405de4d8688d96dd05157c28db3ade5c9bc234kz
d0538f66491267879b7418b21ad78e3dcc2dcc83cg for (j = 0; j < dma->bufs[i].buf_count; j++) {
d0538f66491267879b7418b21ad78e3dcc2dcc83cg if (dma->bufs[i].buflist[j].dev_private) {
d0538f66491267879b7418b21ad78e3dcc2dcc83cg drm_free(dma->bufs[i].buflist[j].dev_private,
d0538f66491267879b7418b21ad78e3dcc2dcc83cg dma->bufs[i].buflist[j].dev_priv_size,
d0538f66491267879b7418b21ad78e3dcc2dcc83cg DRM_MEM_BUFS);
60405de4d8688d96dd05157c28db3ade5c9bc234kz }
d0538f66491267879b7418b21ad78e3dcc2dcc83cg }
d0538f66491267879b7418b21ad78e3dcc2dcc83cg if (dma->bufs[i].buf_count)
60405de4d8688d96dd05157c28db3ade5c9bc234kz drm_free(dma->bufs[i].buflist,
60405de4d8688d96dd05157c28db3ade5c9bc234kz dma->bufs[i].buf_count *
60405de4d8688d96dd05157c28db3ade5c9bc234kz sizeof (*dma->bufs[0].buflist), DRM_MEM_BUFS);
60405de4d8688d96dd05157c28db3ade5c9bc234kz }
60405de4d8688d96dd05157c28db3ade5c9bc234kz if (dma->buflist) {
60405de4d8688d96dd05157c28db3ade5c9bc234kz drm_free(dma->buflist,
60405de4d8688d96dd05157c28db3ade5c9bc234kz dma->buf_count *sizeof (*dma->buflist),
60405de4d8688d96dd05157c28db3ade5c9bc234kz DRM_MEM_BUFS);
60405de4d8688d96dd05157c28db3ade5c9bc234kz }
60405de4d8688d96dd05157c28db3ade5c9bc234kz
60405de4d8688d96dd05157c28db3ade5c9bc234kz if (dma->pagelist) {
60405de4d8688d96dd05157c28db3ade5c9bc234kz drm_free(dma->pagelist,
60405de4d8688d96dd05157c28db3ade5c9bc234kz dma->page_count *sizeof (*dma->pagelist),
60405de4d8688d96dd05157c28db3ade5c9bc234kz DRM_MEM_PAGES);
60405de4d8688d96dd05157c28db3ade5c9bc234kz }
60405de4d8688d96dd05157c28db3ade5c9bc234kz
60405de4d8688d96dd05157c28db3ade5c9bc234kz drm_free(dev->dma, sizeof (*dev->dma), DRM_MEM_DRIVER);
60405de4d8688d96dd05157c28db3ade5c9bc234kz dev->dma = NULL;
60405de4d8688d96dd05157c28db3ade5c9bc234kz mutex_destroy(&dev->dma_lock);
60405de4d8688d96dd05157c28db3ade5c9bc234kz}
60405de4d8688d96dd05157c28db3ade5c9bc234kz
60405de4d8688d96dd05157c28db3ade5c9bc234kz
60405de4d8688d96dd05157c28db3ade5c9bc234kz/*ARGSUSED*/
60405de4d8688d96dd05157c28db3ade5c9bc234kzvoid
60405de4d8688d96dd05157c28db3ade5c9bc234kzdrm_free_buffer(drm_device_t *dev, drm_buf_t *buf)
60405de4d8688d96dd05157c28db3ade5c9bc234kz{
60405de4d8688d96dd05157c28db3ade5c9bc234kz if (!buf)
60405de4d8688d96dd05157c28db3ade5c9bc234kz return;
60405de4d8688d96dd05157c28db3ade5c9bc234kz
60405de4d8688d96dd05157c28db3ade5c9bc234kz buf->pending = 0;
60405de4d8688d96dd05157c28db3ade5c9bc234kz buf->filp = NULL;
60405de4d8688d96dd05157c28db3ade5c9bc234kz buf->used = 0;
60405de4d8688d96dd05157c28db3ade5c9bc234kz}
60405de4d8688d96dd05157c28db3ade5c9bc234kz
60405de4d8688d96dd05157c28db3ade5c9bc234kzvoid
d0538f66491267879b7418b21ad78e3dcc2dcc83cgdrm_reclaim_buffers(drm_device_t *dev, drm_file_t *fpriv)
60405de4d8688d96dd05157c28db3ade5c9bc234kz{
60405de4d8688d96dd05157c28db3ade5c9bc234kz drm_device_dma_t *dma = dev->dma;
60405de4d8688d96dd05157c28db3ade5c9bc234kz int i;
60405de4d8688d96dd05157c28db3ade5c9bc234kz
60405de4d8688d96dd05157c28db3ade5c9bc234kz if (!dma)
60405de4d8688d96dd05157c28db3ade5c9bc234kz return;
60405de4d8688d96dd05157c28db3ade5c9bc234kz for (i = 0; i < dma->buf_count; i++) {
d0538f66491267879b7418b21ad78e3dcc2dcc83cg if (dma->buflist[i]->filp == fpriv) {
60405de4d8688d96dd05157c28db3ade5c9bc234kz switch (dma->buflist[i]->list) {
60405de4d8688d96dd05157c28db3ade5c9bc234kz case DRM_LIST_NONE:
60405de4d8688d96dd05157c28db3ade5c9bc234kz drm_free_buffer(dev, dma->buflist[i]);
60405de4d8688d96dd05157c28db3ade5c9bc234kz break;
60405de4d8688d96dd05157c28db3ade5c9bc234kz case DRM_LIST_WAIT:
60405de4d8688d96dd05157c28db3ade5c9bc234kz dma->buflist[i]->list = DRM_LIST_RECLAIM;
60405de4d8688d96dd05157c28db3ade5c9bc234kz break;
60405de4d8688d96dd05157c28db3ade5c9bc234kz default:
60405de4d8688d96dd05157c28db3ade5c9bc234kz /* Buffer already on hardware. */
60405de4d8688d96dd05157c28db3ade5c9bc234kz break;
60405de4d8688d96dd05157c28db3ade5c9bc234kz }
60405de4d8688d96dd05157c28db3ade5c9bc234kz }
60405de4d8688d96dd05157c28db3ade5c9bc234kz }
60405de4d8688d96dd05157c28db3ade5c9bc234kz}
60405de4d8688d96dd05157c28db3ade5c9bc234kz
60405de4d8688d96dd05157c28db3ade5c9bc234kz/* Call into the driver-specific DMA handler */
60405de4d8688d96dd05157c28db3ade5c9bc234kzint
60405de4d8688d96dd05157c28db3ade5c9bc234kzdrm_dma(DRM_IOCTL_ARGS)
60405de4d8688d96dd05157c28db3ade5c9bc234kz{
60405de4d8688d96dd05157c28db3ade5c9bc234kz DRM_DEVICE;
60405de4d8688d96dd05157c28db3ade5c9bc234kz
d0538f66491267879b7418b21ad78e3dcc2dcc83cg if (dev->driver->dma_ioctl) {
d0538f66491267879b7418b21ad78e3dcc2dcc83cg return (dev->driver->dma_ioctl(dev, data, fpriv, mode));
60405de4d8688d96dd05157c28db3ade5c9bc234kz } else {
d0538f66491267879b7418b21ad78e3dcc2dcc83cg return (EINVAL);
60405de4d8688d96dd05157c28db3ade5c9bc234kz }
60405de4d8688d96dd05157c28db3ade5c9bc234kz}