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

nv04_fence.c (3037B)

      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}