src/mesa/drivers/dri/nouveau_winsys/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 *userdev, uint32_t fb_ctxdma,
  32                       uint32_t tt_ctxdma, struct nouveau_channel **userchan)
  33 {
  34         struct nouveau_device_priv *nv = nouveau_device(userdev);
  35         struct nouveau_channel_priv *chan;
  36         int ret;
  37
  38         if (!nv || !userchan || *userchan)
  39             return -EINVAL;
  40
  41         chan = calloc(1, sizeof(*chan));
  42         if (!chan)
  43                 return -ENOMEM;
  44         chan->base.device = userdev;
  45
  46         chan->drm.fb_ctxdma_handle = fb_ctxdma;
  47         chan->drm.tt_ctxdma_handle = tt_ctxdma;
  48         ret = drmCommandWriteRead(nv->fd, DRM_NOUVEAU_CHANNEL_ALLOC,
  49                                   &chan->drm, sizeof(chan->drm));
  50         if (ret) {
  51                 free(chan);
  52                 return ret;
  53         }
  54
  55         chan->base.id = chan->drm.channel;
  56         if (nouveau_grobj_ref(&chan->base, chan->drm.fb_ctxdma_handle,
  57                               &chan->base.vram) ||
  58             nouveau_grobj_ref(&chan->base, chan->drm.tt_ctxdma_handle,
  59                               &chan->base.gart)) {
  60                 nouveau_channel_free((void *)&chan);
  61                 return -EINVAL;
  62         }
  63
  64         ret = drmMap(nv->fd, chan->drm.ctrl, chan->drm.ctrl_size,
  65                      (void*)&chan->user);
  66         if (ret) {
  67                 nouveau_channel_free((void *)&chan);
  68                 return ret;
  69         }
  70         chan->put     = &chan->user[0x40/4];
  71         chan->get     = &chan->user[0x44/4];
  72         chan->ref_cnt = &chan->user[0x48/4];
  73
  74         ret = drmMap(nv->fd, chan->drm.notifier, chan->drm.notifier_size,
  75                      (drmAddressPtr)&chan->notifier_block);
  76         if (ret) {
  77                 nouveau_channel_free((void *)&chan);
  78                 return ret;
  79         }
  80
  81         ret = drmMap(nv->fd, chan->drm.cmdbuf, chan->drm.cmdbuf_size,
  82                      (void*)&chan->pushbuf);
  83         if (ret) {
  84                 nouveau_channel_free((void *)&chan);
  85                 return ret;
  86         }
  87
  88         chan->max_relocs = chan->drm.cmdbuf_size / 4;
  89         chan->num_relocs = 0;
  90         chan->relocs =
  91                 malloc(sizeof(struct nouveau_bo_reloc) * chan->max_relocs);
  92
  93         nouveau_dma_channel_init(&chan->base);
  94
  95         *userchan = &chan->base;
  96         return 0;
  97 }
  98
  99 void
 100 nouveau_channel_free(struct nouveau_channel **userchan)
 101 {
 102         struct nouveau_channel_priv *chan;
 103
 104         if (!userchan)
 105                 return;
 106         chan = nouveau_channel(*userchan);
 107
 108         if (chan) {
 109                 struct nouveau_device_priv *nv;
 110                 struct drm_nouveau_channel_free cf;
 111
 112                 nv = nouveau_device((*userchan)->device);
 113                 *userchan = NULL;
 114
 115                 FIRE_RING_CH(&chan->base);
 116
 117                 if (chan->relocs)
 118                         free(chan->relocs);
 119
 120                 nouveau_grobj_free(&chan->base.vram);
 121                 nouveau_grobj_free(&chan->base.gart);
 122
 123                 cf.channel = chan->drm.channel;
 124                 drmCommandWrite(nv->fd, DRM_NOUVEAU_CHANNEL_FREE,
 125                                 &cf, sizeof(cf));
 126                 free(chan);
 127         }
 128 }
 129
 130