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![Eric Anholt](/assets/img/avatar_default.png)
As a fallout, replace filp storage with file_priv storage for "unique identifier of a client" all over the DRM. There is a 1:1 mapping, so this should be a noop. This could be a minor performance improvement, as everyth on Linux dereferenced filp to get file_priv anyway, while only the mmap ioct went the other direction. Signed-off-by: Dave Airlie <airlied@linux.ie>
180 lines
4.6 KiB
C
180 lines
4.6 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 "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 = drm_alloc(sizeof(*dev->dma), DRM_MEM_DRIVER);
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if (!dev->dma)
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return -ENOMEM;
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memset(dev->dma, 0, sizeof(*dev->dma));
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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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drm_free(dma->bufs[i].seglist,
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dma->bufs[i].seg_count
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* sizeof(*dma->bufs[0].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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if (dma->bufs[i].buflist[j].dev_private) {
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drm_free(dma->bufs[i].buflist[j].
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dev_private,
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dma->bufs[i].buflist[j].
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dev_priv_size, DRM_MEM_BUFS);
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}
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}
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drm_free(dma->bufs[i].buflist,
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dma->bufs[i].buf_count *
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sizeof(*dma->bufs[0].buflist), DRM_MEM_BUFS);
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}
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}
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if (dma->buflist) {
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drm_free(dma->buflist,
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dma->buf_count * sizeof(*dma->buflist), DRM_MEM_BUFS);
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}
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if (dma->pagelist) {
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drm_free(dma->pagelist,
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dma->page_count * sizeof(*dma->pagelist),
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DRM_MEM_PAGES);
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}
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drm_free(dev->dma, sizeof(*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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if (drm_core_check_feature(dev, DRIVER_DMA_QUEUE)
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&& waitqueue_active(&buf->dma_wait)) {
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wake_up_interruptible(&buf->dma_wait);
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}
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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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