src/gallium/winsys/dri/nouveau/nouveau_channel.c

   1 /*
   2  * Copyright 2007 Nouveau Project
   3  *
   4  * Permission is hereby granted, free of charge, to any person obtaining a
   5  * copy of this software and associated documentation files (the "Software"),
   6  * to deal in the Software without restriction, including without limitation
   7  * the rights to use, copy, modify, merge, publish, distribute, sublicense,
   8  * and/or sell copies of the Software, and to permit persons to whom the
   9  * Software is furnished to do so, subject to the following conditions:
  10  *
  11  * The above copyright notice and this permission notice shall be included in
  12  * all copies or substantial portions of the Software.
  13  *
  14  * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
  15  * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
  16  * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.  IN NO EVENT SHALL
  17  * THE AUTHORS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY,
  18  * WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF
  19  * OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
  20  * SOFTWARE.
  21  */
  22
  23 #include <stdlib.h>
  24 #include <string.h>
  25 #include <errno.h>
  26
  27 #include "nouveau_drmif.h"
  28 #include "nouveau_dma.h"
  29
  30 int
  31 nouveau_channel_alloc(struct nouveau_device *dev, uint32_t fb_ctxdma,
  32                       uint32_t tt_ctxdma, struct nouveau_channel **chan)
  33 {
  34         struct nouveau_device_priv *nvdev = nouveau_device(dev);
  35         struct nouveau_channel_priv *nvchan;
  36         int ret;
  37
  38         if (!nvdev || !chan || *chan)
  39             return -EINVAL;
  40
  41         nvchan = calloc(1, sizeof(struct nouveau_channel_priv));
  42         if (!nvchan)
  43                 return -ENOMEM;
  44         nvchan->base.device = dev;
  45
  46         nvchan->drm.fb_ctxdma_handle = fb_ctxdma;
  47         nvchan->drm.tt_ctxdma_handle = tt_ctxdma;
  48         ret = drmCommandWriteRead(nvdev->fd, DRM_NOUVEAU_CHANNEL_ALLOC,
  49                                   &nvchan->drm, sizeof(nvchan->drm));
  50         if (ret) {
  51                 free(nvchan);
  52                 return ret;
  53         }
  54
  55         nvchan->base.id = nvchan->drm.channel;
  56         if (nouveau_grobj_ref(&nvchan->base, nvchan->drm.fb_ctxdma_handle,
  57                               &nvchan->base.vram) ||
  58             nouveau_grobj_ref(&nvchan->base, nvchan->drm.tt_ctxdma_handle,
  59                               &nvchan->base.gart)) {
  60                 nouveau_channel_free((void *)&nvchan);
  61                 return -EINVAL;
  62         }
  63
  64         ret = drmMap(nvdev->fd, nvchan->drm.ctrl, nvchan->drm.ctrl_size,
  65                      (void*)&nvchan->user);
  66         if (ret) {
  67                 nouveau_channel_free((void *)&nvchan);
  68                 return ret;
  69         }
  70         nvchan->put     = &nvchan->user[0x40/4];
  71         nvchan->get     = &nvchan->user[0x44/4];
  72         nvchan->ref_cnt = &nvchan->user[0x48/4];
  73
  74         ret = drmMap(nvdev->fd, nvchan->drm.notifier, nvchan->drm.notifier_size,
  75                      (drmAddressPtr)&nvchan->notifier_block);
  76         if (ret) {
  77                 nouveau_channel_free((void *)&nvchan);
  78                 return ret;
  79         }
  80
  81         ret = drmMap(nvdev->fd, nvchan->drm.cmdbuf, nvchan->drm.cmdbuf_size,
  82                      (void*)&nvchan->pushbuf);
  83         if (ret) {
  84                 nouveau_channel_free((void *)&nvchan);
  85                 return ret;
  86         }
  87
  88         ret = nouveau_grobj_alloc(&nvchan->base, 0x00000000, 0x0030,
  89                                   &nvchan->base.nullobj);
  90         if (ret) {
  91                 nouveau_channel_free((void *)&nvchan);
  92                 return ret;
  93         }
  94
  95         nouveau_dma_channel_init(&nvchan->base);
  96         nouveau_pushbuf_init(&nvchan->base);
  97
  98         *chan = &nvchan->base;
  99         return 0;
 100 }
 101
 102 void
 103 nouveau_channel_free(struct nouveau_channel **chan)
 104 {
 105         struct nouveau_channel_priv *nvchan;
 106         struct nouveau_device_priv *nvdev;
 107         struct drm_nouveau_channel_free cf;
 108
 109         if (!chan || !*chan)
 110                 return;
 111         nvchan = nouveau_channel(*chan);
 112         *chan = NULL;
 113         nvdev = nouveau_device(nvchan->base.device);
 114
 115         FIRE_RING_CH(&nvchan->base);
 116
 117         nouveau_grobj_free(&nvchan->base.vram);
 118         nouveau_grobj_free(&nvchan->base.gart);
 119         nouveau_grobj_free(&nvchan->base.nullobj);
 120
 121         cf.channel = nvchan->drm.channel;
 122         drmCommandWrite(nvdev->fd, DRM_NOUVEAU_CHANNEL_FREE, &cf, sizeof(cf));
 123         free(nvchan);
 124 }
 125
 126