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#include "nouveau_drv.h"
  25#include "nouveau_dma.h"
  26#include "nv10_fence.h"
  27
  28#include <nvif/push006c.h>
  29
  30#include <nvhw/class/cl006e.h>
  31
  32int
  33nv10_fence_emit(struct nouveau_fence *fence)
  34{
  35        struct nvif_push *push = fence->channel->chan.push;
  36        int ret = PUSH_WAIT(push, 2);
  37        if (ret == 0) {
  38                PUSH_MTHD(push, NV06E, SET_REFERENCE, fence->base.seqno);
  39                PUSH_KICK(push);
  40        }
  41        return ret;
  42}
  43
  44
  45static int
  46nv10_fence_sync(struct nouveau_fence *fence,
  47                struct nouveau_channel *prev, struct nouveau_channel *chan)
  48{
  49        return -ENODEV;
  50}
  51
  52u32
  53nv10_fence_read(struct nouveau_channel *chan)
  54{
  55        return NVIF_RD32(&chan->user, NV06E, REFERENCE);
  56}
  57
  58void
  59nv10_fence_context_del(struct nouveau_channel *chan)
  60{
  61        struct nv10_fence_chan *fctx = chan->fence;
  62        nouveau_fence_context_del(&fctx->base);
  63        nvif_object_dtor(&fctx->sema);
  64        chan->fence = NULL;
  65        nouveau_fence_context_free(&fctx->base);
  66}
  67
  68static int
  69nv10_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(chan, &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
  84void
  85nv10_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
  96int
  97nv10_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}
 111