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#include "nouveau_drv.h"
  25#include "nouveau_dma.h"
  26#include "nouveau_fence.h"
  27
  28#include <nvif/if0004.h>
  29#include <nvif/push006c.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 nvif_push *push = fence->channel->chan.push;
  43        int ret = PUSH_WAIT(push, 2);
  44        if (ret == 0) {
  45                PUSH_NVSQ(push, NV_SW, 0x0150, fence->base.seqno);
  46                PUSH_KICK(push);
  47        }
  48        return ret;
  49}
  50
  51static int
  52nv04_fence_sync(struct nouveau_fence *fence,
  53                struct nouveau_channel *prev, struct nouveau_channel *chan)
  54{
  55        return -ENODEV;
  56}
  57
  58static u32
  59nv04_fence_read(struct nouveau_channel *chan)
  60{
  61        struct nv04_nvsw_get_ref_v0 args = {};
  62        WARN_ON(nvif_object_mthd(&chan->nvsw, NV04_NVSW_GET_REF,
  63                                 &args, sizeof(args)));
  64        return args.ref;
  65}
  66
  67static void
  68nv04_fence_context_del(struct nouveau_channel *chan)
  69{
  70        struct nv04_fence_chan *fctx = chan->fence;
  71        nouveau_fence_context_del(&fctx->base);
  72        chan->fence = NULL;
  73        nouveau_fence_context_free(&fctx->base);
  74}
  75
  76static int
  77nv04_fence_context_new(struct nouveau_channel *chan)
  78{
  79        struct nv04_fence_chan *fctx = kzalloc(sizeof(*fctx), GFP_KERNEL);
  80        if (fctx) {
  81                nouveau_fence_context_new(chan, &fctx->base);
  82                fctx->base.emit = nv04_fence_emit;
  83                fctx->base.sync = nv04_fence_sync;
  84                fctx->base.read = nv04_fence_read;
  85                chan->fence = fctx;
  86                return 0;
  87        }
  88        return -ENOMEM;
  89}
  90
  91static void
  92nv04_fence_destroy(struct nouveau_drm *drm)
  93{
  94        struct nv04_fence_priv *priv = drm->fence;
  95        drm->fence = NULL;
  96        kfree(priv);
  97}
  98
  99int
 100nv04_fence_create(struct nouveau_drm *drm)
 101{
 102        struct nv04_fence_priv *priv;
 103
 104        priv = drm->fence = kzalloc(sizeof(*priv), GFP_KERNEL);
 105        if (!priv)
 106                return -ENOMEM;
 107
 108        priv->base.dtor = nv04_fence_destroy;
 109        priv->base.context_new = nv04_fence_context_new;
 110        priv->base.context_del = nv04_fence_context_del;
 111        return 0;
 112}
 113