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455fa6518a
This update brings few features:
o Support for the setmaster/dropmaster ioctls. For instance, they
are used to run multiple X servers simultaneously.
o Support for minor devices. The only user-visible change is a new
entry in /dev/dri but it is useless at the moment. This is a
first step to support render nodes [1].
The main benefit is to greatly reduce the diff with Linux (at the
expense of an unreadable commit diff). Hopefully, next upgrades will be
easier.
No updates were made to the drivers, beside adapting them to API
changes.
[1] https://en.wikipedia.org/wiki/Direct_Rendering_Manager#Render_nodes
Tested by: Many people
MFC after: 1 month
Relnotes: yes
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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