592ffb2175
Revert r338177, r338176, r338175, r338174, r338172 After long consultations with re@, core members and mmacy, revert these changes. Followup changes will be made to mark them as deprecated and prent a message about where to find the up-to-date driver. Followup commits will be made to make this clear in the installer. Followup commits to reduce POLA in ways we're still exploring. It's anticipated that after the freeze, this will be removed in 13-current (with the residual of the drm2 code copied to sys/arm/dev/drm2 for the TEGRA port's use w/o the intel or radeon drivers). Due to the impending freeze, there was no formal core vote for this. I've been talking to different core members all day, as well as Matt Macey and Glen Barber. Nobody is completely happy, all are grudgingly going along with this. Work is in progress to mitigate the negative effects as much as possible. Requested by: re@ (gjb, rgrimes)
140 lines
3.7 KiB
C
140 lines
3.7 KiB
C
/*-
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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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__FBSDID("$FreeBSD$");
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/** @file drm_dma.c
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* Support code for DMA buffer management.
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*
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* The implementation used to be significantly more complicated, but the
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* complexity has been moved into the drivers as different buffer management
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* schemes evolved.
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*/
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#include "dev/drm/drmP.h"
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int drm_dma_setup(struct drm_device *dev)
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{
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dev->dma = malloc(sizeof(*dev->dma), DRM_MEM_DRIVER, M_NOWAIT | M_ZERO);
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if (dev->dma == NULL)
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return 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(struct drm_device *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", i, 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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free(dma->bufs[i].seglist, DRM_MEM_SEGS);
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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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DRM_MEM_BUFS);
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}
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free(dma->bufs[i].buflist, DRM_MEM_BUFS);
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}
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}
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free(dma->buflist, DRM_MEM_BUFS);
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free(dma->pagelist, DRM_MEM_PAGES);
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free(dev->dma, DRM_MEM_DRIVER);
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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(struct drm_device *dev, drm_buf_t *buf)
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{
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if (!buf)
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return;
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buf->pending = 0;
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buf->file_priv= NULL;
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buf->used = 0;
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}
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void drm_reclaim_buffers(struct drm_device *dev, struct drm_file *file_priv)
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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)
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return;
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for (i = 0; i < dma->buf_count; i++) {
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if (dma->buflist[i]->file_priv == file_priv) {
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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(struct drm_device *dev, void *data, struct drm_file *file_priv)
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{
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if (dev->driver->dma_ioctl) {
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/* shared code returns -errno */
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return -dev->driver->dma_ioctl(dev, data, file_priv);
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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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