drm_dma.c

Version: - FREEBSD - FREEBSD-13-STABLE - FREEBSD-13-0 - FREEBSD-12-STABLE - FREEBSD-12-0 - FREEBSD-11-STABLE - FREEBSD-11-0 - FREEBSD-10-STABLE - FREEBSD-10-0 - FREEBSD-9-STABLE - FREEBSD-9-0 - FREEBSD-8-STABLE - FREEBSD-8-0 - FREEBSD-7-STABLE - FREEBSD-7-0 - FREEBSD-6-STABLE - FREEBSD-6-0 - FREEBSD-5-STABLE - FREEBSD-5-0 - FREEBSD-4-STABLE - FREEBSD-3-STABLE - FREEBSD22 - l41 - OPENBSD - linux-2.6 - MK84 - PLAN9 - xnu-8792
SearchContext: - none - 3 - 10

    1 /*-
    2  * Copyright 1999, 2000 Precision Insight, Inc., Cedar Park, Texas.
    3  * Copyright 2000 VA Linux Systems, Inc., Sunnyvale, California.
    4  * All Rights Reserved.
    5  *
    6  * Permission is hereby granted, free of charge, to any person obtaining a
    7  * copy of this software and associated documentation files (the "Software"),
    8  * to deal in the Software without restriction, including without limitation
    9  * the rights to use, copy, modify, merge, publish, distribute, sublicense,
   10  * and/or sell copies of the Software, and to permit persons to whom the
   11  * Software is furnished to do so, subject to the following conditions:
   12  *
   13  * The above copyright notice and this permission notice (including the next
   14  * paragraph) shall be included in all copies or substantial portions of the
   15  * Software.
   16  *
   17  * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
   18  * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
   19  * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.  IN NO EVENT SHALL
   20  * VA LINUX SYSTEMS AND/OR ITS SUPPLIERS BE LIABLE FOR ANY CLAIM, DAMAGES OR
   21  * OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE,
   22  * ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR
   23  * OTHER DEALINGS IN THE SOFTWARE.
   24  *
   25  * Authors:
   26  *    Rickard E. (Rik) Faith <faith@valinux.com>
   27  *    Gareth Hughes <gareth@valinux.com>
   28  *
   29  */
   30 
   31 #include <sys/cdefs.h>
   32 __FBSDID("$FreeBSD$");
   33 
   34 /** @file drm_dma.c
   35  * Support code for DMA buffer management.
   36  *
   37  * The implementation used to be significantly more complicated, but the
   38  * complexity has been moved into the drivers as different buffer management
   39  * schemes evolved.
   40  */
   41 
   42 #include "dev/drm/drmP.h"
   43 
   44 int drm_dma_setup(struct drm_device *dev)
   45 {
   46 
   47         dev->dma = malloc(sizeof(*dev->dma), DRM_MEM_DRIVER, M_NOWAIT | M_ZERO);
   48         if (dev->dma == NULL)
   49                 return ENOMEM;
   50 
   51         DRM_SPININIT(&dev->dma_lock, "drmdma");
   52 
   53         return 0;
   54 }
   55 
   56 void drm_dma_takedown(struct drm_device *dev)
   57 {
   58         drm_device_dma_t  *dma = dev->dma;
   59         int               i, j;
   60 
   61         if (dma == NULL)
   62                 return;
   63 
   64         /* Clear dma buffers */
   65         for (i = 0; i <= DRM_MAX_ORDER; i++) {
   66                 if (dma->bufs[i].seg_count) {
   67                         DRM_DEBUG("order %d: buf_count = %d,"
   68                             " seg_count = %d\n", i, dma->bufs[i].buf_count,
   69                             dma->bufs[i].seg_count);
   70                         for (j = 0; j < dma->bufs[i].seg_count; j++) {
   71                                 drm_pci_free(dev, dma->bufs[i].seglist[j]);
   72                         }
   73                         free(dma->bufs[i].seglist, DRM_MEM_SEGS);
   74                 }
   75 
   76                 if (dma->bufs[i].buf_count) {
   77                         for (j = 0; j < dma->bufs[i].buf_count; j++) {
   78                                 free(dma->bufs[i].buflist[j].dev_private,
   79                                     DRM_MEM_BUFS);
   80                         }
   81                         free(dma->bufs[i].buflist, DRM_MEM_BUFS);
   82                 }
   83         }
   84 
   85         free(dma->buflist, DRM_MEM_BUFS);
   86         free(dma->pagelist, DRM_MEM_PAGES);
   87         free(dev->dma, DRM_MEM_DRIVER);
   88         dev->dma = NULL;
   89         DRM_SPINUNINIT(&dev->dma_lock);
   90 }
   91 
   92 
   93 void drm_free_buffer(struct drm_device *dev, drm_buf_t *buf)
   94 {
   95         if (!buf)
   96                 return;
   97 
   98         buf->pending  = 0;
   99         buf->file_priv= NULL;
  100         buf->used     = 0;
  101 }
  102 
  103 void drm_reclaim_buffers(struct drm_device *dev, struct drm_file *file_priv)
  104 {
  105         drm_device_dma_t *dma = dev->dma;
  106         int              i;
  107 
  108         if (!dma)
  109                 return;
  110 
  111         for (i = 0; i < dma->buf_count; i++) {
  112                 if (dma->buflist[i]->file_priv == file_priv) {
  113                         switch (dma->buflist[i]->list) {
  114                         case DRM_LIST_NONE:
  115                                 drm_free_buffer(dev, dma->buflist[i]);
  116                                 break;
  117                         case DRM_LIST_WAIT:
  118                                 dma->buflist[i]->list = DRM_LIST_RECLAIM;
  119                                 break;
  120                         default:
  121                                 /* Buffer already on hardware. */
  122                                 break;
  123                         }
  124                 }
  125         }
  126 }
  127 
  128 /* Call into the driver-specific DMA handler */
  129 int drm_dma(struct drm_device *dev, void *data, struct drm_file *file_priv)
  130 {
  131 
  132         if (dev->driver->dma_ioctl) {
  133                 /* shared code returns -errno */
  134                 return -dev->driver->dma_ioctl(dev, data, file_priv);
  135         } else {
  136                 DRM_DEBUG("DMA ioctl on driver with no dma handler\n");
  137                 return EINVAL;
  138         }
  139 }

Cache object: 32fe70ad85044c544669133fdcc491df

[ source navigation ] [ diff markup ] [ identifier search ] [ freetext search ] [ file search ] [ list types ] [ track identifier ]

This page is part of the FreeBSD/Linux Linux Kernel Cross-Reference, and was automatically generated using a modified version of the LXR engine.

FreeBSD/Linux Kernel Cross Reference sys/dev/drm/drm_dma.c

FreeBSD/Linux Kernel Cross Reference
sys/dev/drm/drm_dma.c