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

base.c (3218B)

      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 "priv.h"
     25#include "chan.h"
     26
     27#include <engine/fifo.h>
     28
     29bool
     30nvkm_sw_mthd(struct nvkm_sw *sw, int chid, int subc, u32 mthd, u32 data)
     31{
     32	struct nvkm_sw_chan *chan;
     33	bool handled = false;
     34	unsigned long flags;
     35
     36	spin_lock_irqsave(&sw->engine.lock, flags);
     37	list_for_each_entry(chan, &sw->chan, head) {
     38		if (chan->fifo->chid == chid) {
     39			handled = nvkm_sw_chan_mthd(chan, subc, mthd, data);
     40			list_del(&chan->head);
     41			list_add(&chan->head, &sw->chan);
     42			break;
     43		}
     44	}
     45	spin_unlock_irqrestore(&sw->engine.lock, flags);
     46	return handled;
     47}
     48
     49static int
     50nvkm_sw_oclass_new(const struct nvkm_oclass *oclass, void *data, u32 size,
     51		   struct nvkm_object **pobject)
     52{
     53	struct nvkm_sw_chan *chan = nvkm_sw_chan(oclass->parent);
     54	const struct nvkm_sw_chan_sclass *sclass = oclass->engn;
     55	return sclass->ctor(chan, oclass, data, size, pobject);
     56}
     57
     58static int
     59nvkm_sw_oclass_get(struct nvkm_oclass *oclass, int index)
     60{
     61	struct nvkm_sw *sw = nvkm_sw(oclass->engine);
     62	int c = 0;
     63
     64	while (sw->func->sclass[c].ctor) {
     65		if (c++ == index) {
     66			oclass->engn = &sw->func->sclass[index];
     67			oclass->base =  sw->func->sclass[index].base;
     68			oclass->base.ctor = nvkm_sw_oclass_new;
     69			return index;
     70		}
     71	}
     72
     73	return c;
     74}
     75
     76static int
     77nvkm_sw_cclass_get(struct nvkm_fifo_chan *fifoch,
     78		   const struct nvkm_oclass *oclass,
     79		   struct nvkm_object **pobject)
     80{
     81	struct nvkm_sw *sw = nvkm_sw(oclass->engine);
     82	return sw->func->chan_new(sw, fifoch, oclass, pobject);
     83}
     84
     85static void *
     86nvkm_sw_dtor(struct nvkm_engine *engine)
     87{
     88	return nvkm_sw(engine);
     89}
     90
     91static const struct nvkm_engine_func
     92nvkm_sw = {
     93	.dtor = nvkm_sw_dtor,
     94	.fifo.cclass = nvkm_sw_cclass_get,
     95	.fifo.sclass = nvkm_sw_oclass_get,
     96};
     97
     98int
     99nvkm_sw_new_(const struct nvkm_sw_func *func, struct nvkm_device *device,
    100	     enum nvkm_subdev_type type, int inst, struct nvkm_sw **psw)
    101{
    102	struct nvkm_sw *sw;
    103
    104	if (!(sw = *psw = kzalloc(sizeof(*sw), GFP_KERNEL)))
    105		return -ENOMEM;
    106	INIT_LIST_HEAD(&sw->chan);
    107	sw->func = func;
    108
    109	return nvkm_engine_ctor(&nvkm_sw, device, type, inst, true, &sw->engine);
    110}