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 (3386B)

      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 "priv.h"
     25
     26#include <core/client.h>
     27#include <engine/fifo.h>
     28
     29#include <nvif/class.h>
     30
     31static int
     32nvkm_dma_oclass_new(struct nvkm_device *device,
     33		    const struct nvkm_oclass *oclass, void *data, u32 size,
     34		    struct nvkm_object **pobject)
     35{
     36	struct nvkm_dma *dma = nvkm_dma(oclass->engine);
     37	struct nvkm_dmaobj *dmaobj = NULL;
     38	int ret;
     39
     40	ret = dma->func->class_new(dma, oclass, data, size, &dmaobj);
     41	if (dmaobj)
     42		*pobject = &dmaobj->object;
     43	return ret;
     44}
     45
     46static const struct nvkm_device_oclass
     47nvkm_dma_oclass_base = {
     48	.ctor = nvkm_dma_oclass_new,
     49};
     50
     51static int
     52nvkm_dma_oclass_fifo_new(const struct nvkm_oclass *oclass, void *data, u32 size,
     53			 struct nvkm_object **pobject)
     54{
     55	return nvkm_dma_oclass_new(oclass->engine->subdev.device,
     56				   oclass, data, size, pobject);
     57}
     58
     59static const struct nvkm_sclass
     60nvkm_dma_sclass[] = {
     61	{ 0, 0, NV_DMA_FROM_MEMORY, NULL, nvkm_dma_oclass_fifo_new },
     62	{ 0, 0, NV_DMA_TO_MEMORY, NULL, nvkm_dma_oclass_fifo_new },
     63	{ 0, 0, NV_DMA_IN_MEMORY, NULL, nvkm_dma_oclass_fifo_new },
     64};
     65
     66static int
     67nvkm_dma_oclass_base_get(struct nvkm_oclass *sclass, int index,
     68			 const struct nvkm_device_oclass **class)
     69{
     70	const int count = ARRAY_SIZE(nvkm_dma_sclass);
     71	if (index < count) {
     72		const struct nvkm_sclass *oclass = &nvkm_dma_sclass[index];
     73		sclass->base = oclass[0];
     74		sclass->engn = oclass;
     75		*class = &nvkm_dma_oclass_base;
     76		return index;
     77	}
     78	return count;
     79}
     80
     81static int
     82nvkm_dma_oclass_fifo_get(struct nvkm_oclass *oclass, int index)
     83{
     84	const int count = ARRAY_SIZE(nvkm_dma_sclass);
     85	if (index < count) {
     86		oclass->base = nvkm_dma_sclass[index];
     87		return index;
     88	}
     89	return count;
     90}
     91
     92static void *
     93nvkm_dma_dtor(struct nvkm_engine *engine)
     94{
     95	return nvkm_dma(engine);
     96}
     97
     98static const struct nvkm_engine_func
     99nvkm_dma = {
    100	.dtor = nvkm_dma_dtor,
    101	.base.sclass = nvkm_dma_oclass_base_get,
    102	.fifo.sclass = nvkm_dma_oclass_fifo_get,
    103};
    104
    105int
    106nvkm_dma_new_(const struct nvkm_dma_func *func, struct nvkm_device *device,
    107	      enum nvkm_subdev_type type, int inst, struct nvkm_dma **pdma)
    108{
    109	struct nvkm_dma *dma;
    110
    111	if (!(dma = *pdma = kzalloc(sizeof(*dma), GFP_KERNEL)))
    112		return -ENOMEM;
    113	dma->func = func;
    114
    115	return nvkm_engine_ctor(&nvkm_dma, device, type, inst, true, &dma->engine);
    116}