LXR linux/drivers/gpu/drm/nouveau/nv04

   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
  23 */
  24
  25#include "nouveau_drv.h"
  26#include "nouveau_dma.h"
  27#include "nouveau_fence.h"
  28
  29#include <nvif/if0004.h>
  30
  31struct nv04_fence_chan {
  32        struct nouveau_fence_chan base;
  33};
  34
  35struct nv04_fence_priv {
  36        struct nouveau_fence_priv base;
  37};
  38
  39static int
  40nv04_fence_emit(struct nouveau_fence *fence)
  41{
  42        struct nouveau_channel *chan = fence->channel;
  43        int ret = RING_SPACE(chan, 2);
  44        if (ret == 0) {
  45                BEGIN_NV04(chan, NvSubSw, 0x0150, 1);
  46                OUT_RING  (chan, fence->base.seqno);
  47                FIRE_RING (chan);
  48        }
  49        return ret;
  50}
  51
  52static int
  53nv04_fence_sync(struct nouveau_fence *fence,
  54                struct nouveau_channel *prev, struct nouveau_channel *chan)
  55{
  56        return -ENODEV;
  57}
  58
  59static u32
  60nv04_fence_read(struct nouveau_channel *chan)
  61{
  62        struct nv04_nvsw_get_ref_v0 args = {};
  63        WARN_ON(nvif_object_mthd(&chan->nvsw, NV04_NVSW_GET_REF,
  64                                 &args, sizeof(args)));
  65        return args.ref;
  66}
  67
  68static void
  69nv04_fence_context_del(struct nouveau_channel *chan)
  70{
  71        struct nv04_fence_chan *fctx = chan->fence;
  72        nouveau_fence_context_del(&fctx->base);
  73        chan->fence = NULL;
  74        nouveau_fence_context_free(&fctx->base);
  75}
  76
  77static int
  78nv04_fence_context_new(struct nouveau_channel *chan)
  79{
  80        struct nv04_fence_chan *fctx = kzalloc(sizeof(*fctx), GFP_KERNEL);
  81        if (fctx) {
  82                nouveau_fence_context_new(chan, &fctx->base);
  83                fctx->base.emit = nv04_fence_emit;
  84                fctx->base.sync = nv04_fence_sync;
  85                fctx->base.read = nv04_fence_read;
  86                chan->fence = fctx;
  87                return 0;
  88        }
  89        return -ENOMEM;
  90}
  91
  92static void
  93nv04_fence_destroy(struct nouveau_drm *drm)
  94{
  95        struct nv04_fence_priv *priv = drm->fence;
  96        drm->fence = NULL;
  97        kfree(priv);
  98}
  99
 100int
 101nv04_fence_create(struct nouveau_drm *drm)
 102{
 103        struct nv04_fence_priv *priv;
 104
 105        priv = drm->fence = kzalloc(sizeof(*priv), GFP_KERNEL);
 106        if (!priv)
 107                return -ENOMEM;
 108
 109        priv->base.dtor = nv04_fence_destroy;
 110        priv->base.context_new = nv04_fence_context_new;
 111        priv->base.context_del = nv04_fence_context_del;
 112        return 0;
 113}
 114