ae526637c4
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)
161 lines
4.0 KiB
C
161 lines
4.0 KiB
C
/**
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* \file drm_dma.c
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* DMA IOCTL and function support
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*
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* \author Rickard E. (Rik) Faith <faith@valinux.com>
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* \author Gareth Hughes <gareth@valinux.com>
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*/
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/*-
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* Created: Fri Mar 19 14:30:16 1999 by faith@valinux.com
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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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#include <sys/cdefs.h>
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__FBSDID("$FreeBSD$");
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#include <dev/drm2/drmP.h>
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/**
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* Initialize the DMA data.
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*
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* \param dev DRM device.
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* \return zero on success or a negative value on failure.
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*
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* Allocate and initialize a drm_device_dma structure.
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*/
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int drm_dma_setup(struct drm_device *dev)
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{
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int i;
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dev->dma = malloc(sizeof(*dev->dma), DRM_MEM_DRIVER, M_NOWAIT | M_ZERO);
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if (!dev->dma)
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return -ENOMEM;
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for (i = 0; i <= DRM_MAX_ORDER; i++)
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memset(&dev->dma->bufs[i], 0, sizeof(dev->dma->bufs[0]));
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return 0;
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}
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/**
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* Cleanup the DMA resources.
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*
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* \param dev DRM device.
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*
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* Free all pages associated with DMA buffers, the buffers and pages lists, and
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* finally the drm_device::dma structure itself.
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*/
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void drm_dma_takedown(struct drm_device *dev)
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{
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struct drm_device_dma *dma = dev->dma;
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int i, j;
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if (!dma)
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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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if (dma->bufs[i].seglist[j]) {
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drm_pci_free(dev, dma->bufs[i].seglist[j]);
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}
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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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}
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/**
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* Free a buffer.
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*
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* \param dev DRM device.
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* \param buf buffer to free.
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*
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* Resets the fields of \p buf.
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*/
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void drm_free_buffer(struct drm_device *dev, struct drm_buf * buf)
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{
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if (!buf)
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return;
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buf->waiting = 0;
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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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/**
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* Reclaim the buffers.
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*
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* \param file_priv DRM file private.
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*
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* Frees each buffer associated with \p file_priv not already on the hardware.
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*/
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void drm_core_reclaim_buffers(struct drm_device *dev,
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struct drm_file *file_priv)
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{
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struct drm_device_dma *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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EXPORT_SYMBOL(drm_core_reclaim_buffers);
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