LXR linux/drivers/gpu/drm/nouveau/nv10

   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 "nouveau_drv.h"
  26#include "nouveau_dma.h"
  27#include "nv10_fence.h"
  28
  29int
  30nv10_fence_emit(struct nouveau_fence *fence)
  31{
  32        struct nouveau_channel *chan = fence->channel;
  33        int ret = RING_SPACE(chan, 2);
  34        if (ret == 0) {
  35                BEGIN_NV04(chan, 0, NV10_SUBCHAN_REF_CNT, 1);
  36                OUT_RING  (chan, fence->base.seqno);
  37                FIRE_RING (chan);
  38        }
  39        return ret;
  40}
  41
  42
  43static int
  44nv10_fence_sync(struct nouveau_fence *fence,
  45                struct nouveau_channel *prev, struct nouveau_channel *chan)
  46{
  47        return -ENODEV;
  48}
  49
  50u32
  51nv10_fence_read(struct nouveau_channel *chan)
  52{
  53        return nvif_rd32(&chan->user, 0x0048);
  54}
  55
  56void
  57nv10_fence_context_del(struct nouveau_channel *chan)
  58{
  59        struct nv10_fence_chan *fctx = chan->fence;
  60        nouveau_fence_context_del(&fctx->base);
  61        nvif_object_fini(&fctx->sema);
  62        chan->fence = NULL;
  63        nouveau_fence_context_free(&fctx->base);
  64}
  65
  66static int
  67nv10_fence_context_new(struct nouveau_channel *chan)
  68{
  69        struct nv10_fence_chan *fctx;
  70
  71        fctx = chan->fence = kzalloc(sizeof(*fctx), GFP_KERNEL);
  72        if (!fctx)
  73                return -ENOMEM;
  74
  75        nouveau_fence_context_new(chan, &fctx->base);
  76        fctx->base.emit = nv10_fence_emit;
  77        fctx->base.read = nv10_fence_read;
  78        fctx->base.sync = nv10_fence_sync;
  79        return 0;
  80}
  81
  82void
  83nv10_fence_destroy(struct nouveau_drm *drm)
  84{
  85        struct nv10_fence_priv *priv = drm->fence;
  86        nouveau_bo_unmap(priv->bo);
  87        if (priv->bo)
  88                nouveau_bo_unpin(priv->bo);
  89        nouveau_bo_ref(NULL, &priv->bo);
  90        drm->fence = NULL;
  91        kfree(priv);
  92}
  93
  94int
  95nv10_fence_create(struct nouveau_drm *drm)
  96{
  97        struct nv10_fence_priv *priv;
  98
  99        priv = drm->fence = kzalloc(sizeof(*priv), GFP_KERNEL);
 100        if (!priv)
 101                return -ENOMEM;
 102
 103        priv->base.dtor = nv10_fence_destroy;
 104        priv->base.context_new = nv10_fence_context_new;
 105        priv->base.context_del = nv10_fence_context_del;
 106        spin_lock_init(&priv->lock);
 107        return 0;
 108}
 109