cachepc-linux

Fork of AMDESE/linux with modifications for CachePC side-channel attack
git clone https://git.sinitax.com/sinitax/cachepc-linux
Log | Files | Refs | README | LICENSE | sfeed.txt

nv10_fence.c (2987B)

      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}