drivers/gpu/drm/nouveau/nv10_fence.c

   1 /*
   2  * Copyright 2012 Red Hat Inc.
   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 COPYRIGHT HOLDER(S) OR AUTHOR(S) BE LIABLE FOR ANY CLAIM, DAMAGES OR
  18  * OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE,
  19  * ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR
  20  * OTHER DEALINGS IN THE SOFTWARE.
  21  *
  22  * Authors: Ben Skeggs <bskeggs@redhat.com>
  23  */
  24
  25 #include <core/object.h>
  26 #include <core/class.h>
  27
  28 #include "nouveau_drm.h"
  29 #include "nouveau_dma.h"
  30 #include "nv10_fence.h"
  31
  32 int
  33 nv10_fence_emit(struct nouveau_fence *fence)
  34 {
  35         struct nouveau_channel *chan = fence->channel;
  36         int ret = RING_SPACE(chan, 2);
  37         if (ret == 0) {
  38                 BEGIN_NV04(chan, 0, NV10_SUBCHAN_REF_CNT, 1);
  39                 OUT_RING  (chan, fence->sequence);
  40                 FIRE_RING (chan);
  41         }
  42         return ret;
  43 }
  44
  45
  46 static int
  47 nv10_fence_sync(struct nouveau_fence *fence,
  48                 struct nouveau_channel *prev, struct nouveau_channel *chan)
  49 {
  50         return -ENODEV;
  51 }
  52
  53 u32
  54 nv10_fence_read(struct nouveau_channel *chan)
  55 {
  56         return nv_ro32(chan->object, 0x0048);
  57 }
  58
  59 void
  60 nv10_fence_context_del(struct nouveau_channel *chan)
  61 {
  62         struct nv10_fence_chan *fctx = chan->fence;
  63         nouveau_fence_context_del(&fctx->base);
  64         chan->fence = NULL;
  65         kfree(fctx);
  66 }
  67
  68 int
  69 nv10_fence_context_new(struct nouveau_channel *chan)
  70 {
  71         struct nv10_fence_chan *fctx;
  72
  73         fctx = chan->fence = kzalloc(sizeof(*fctx), GFP_KERNEL);
  74         if (!fctx)
  75                 return -ENOMEM;
  76
  77         nouveau_fence_context_new(&fctx->base);
  78         fctx->base.emit = nv10_fence_emit;
  79         fctx->base.read = nv10_fence_read;
  80         fctx->base.sync = nv10_fence_sync;
  81         return 0;
  82 }
  83
  84 void
  85 nv10_fence_destroy(struct nouveau_drm *drm)
  86 {
  87         struct nv10_fence_priv *priv = drm->fence;
  88         nouveau_bo_unmap(priv->bo);
  89         if (priv->bo)
  90                 nouveau_bo_unpin(priv->bo);
  91         nouveau_bo_ref(NULL, &priv->bo);
  92         drm->fence = NULL;
  93         kfree(priv);
  94 }
  95
  96 int
  97 nv10_fence_create(struct nouveau_drm *drm)
  98 {
  99         struct nv10_fence_priv *priv;
 100
 101         priv = drm->fence = kzalloc(sizeof(*priv), GFP_KERNEL);
 102         if (!priv)
 103                 return -ENOMEM;
 104
 105         priv->base.dtor = nv10_fence_destroy;
 106         priv->base.context_new = nv10_fence_context_new;
 107         priv->base.context_del = nv10_fence_context_del;
 108         spin_lock_init(&priv->lock);
 109         return 0;
 110 }