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

chan.c (3097B)

      1/*
      2 * Copyright 2015 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 "chan.h"
     25
     26#include <core/notify.h>
     27#include <engine/fifo.h>
     28
     29#include <nvif/event.h>
     30#include <nvif/unpack.h>
     31
     32bool
     33nvkm_sw_chan_mthd(struct nvkm_sw_chan *chan, int subc, u32 mthd, u32 data)
     34{
     35	switch (mthd) {
     36	case 0x0000:
     37		return true;
     38	case 0x0500:
     39		nvkm_event_send(&chan->event, 1, 0, NULL, 0);
     40		return true;
     41	default:
     42		if (chan->func->mthd)
     43			return chan->func->mthd(chan, subc, mthd, data);
     44		break;
     45	}
     46	return false;
     47}
     48
     49static int
     50nvkm_sw_chan_event_ctor(struct nvkm_object *object, void *data, u32 size,
     51			struct nvkm_notify *notify)
     52{
     53	union {
     54		struct nvif_notify_uevent_req none;
     55	} *req = data;
     56	int ret = -ENOSYS;
     57
     58	if (!(ret = nvif_unvers(ret, &data, &size, req->none))) {
     59		notify->size  = sizeof(struct nvif_notify_uevent_rep);
     60		notify->types = 1;
     61		notify->index = 0;
     62	}
     63
     64	return ret;
     65}
     66
     67static const struct nvkm_event_func
     68nvkm_sw_chan_event = {
     69	.ctor = nvkm_sw_chan_event_ctor,
     70};
     71
     72static void *
     73nvkm_sw_chan_dtor(struct nvkm_object *object)
     74{
     75	struct nvkm_sw_chan *chan = nvkm_sw_chan(object);
     76	struct nvkm_sw *sw = chan->sw;
     77	unsigned long flags;
     78	void *data = chan;
     79
     80	if (chan->func->dtor)
     81		data = chan->func->dtor(chan);
     82	nvkm_event_fini(&chan->event);
     83
     84	spin_lock_irqsave(&sw->engine.lock, flags);
     85	list_del(&chan->head);
     86	spin_unlock_irqrestore(&sw->engine.lock, flags);
     87	return data;
     88}
     89
     90static const struct nvkm_object_func
     91nvkm_sw_chan = {
     92	.dtor = nvkm_sw_chan_dtor,
     93};
     94
     95int
     96nvkm_sw_chan_ctor(const struct nvkm_sw_chan_func *func, struct nvkm_sw *sw,
     97		  struct nvkm_fifo_chan *fifo, const struct nvkm_oclass *oclass,
     98		  struct nvkm_sw_chan *chan)
     99{
    100	unsigned long flags;
    101
    102	nvkm_object_ctor(&nvkm_sw_chan, oclass, &chan->object);
    103	chan->func = func;
    104	chan->sw = sw;
    105	chan->fifo = fifo;
    106	spin_lock_irqsave(&sw->engine.lock, flags);
    107	list_add(&chan->head, &sw->chan);
    108	spin_unlock_irqrestore(&sw->engine.lock, flags);
    109
    110	return nvkm_event_init(&nvkm_sw_chan_event, 1, 1, &chan->event);
    111}