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 (3817B)

      1/*
      2 * Copyright 2014 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
     26#include <core/memory.h>
     27
     28void
     29nvkm_ltc_tags_clear(struct nvkm_device *device, u32 first, u32 count)
     30{
     31	struct nvkm_ltc *ltc = device->ltc;
     32	const u32 limit = first + count - 1;
     33
     34	BUG_ON((first > limit) || (limit >= ltc->num_tags));
     35
     36	mutex_lock(&ltc->mutex);
     37	ltc->func->cbc_clear(ltc, first, limit);
     38	ltc->func->cbc_wait(ltc);
     39	mutex_unlock(&ltc->mutex);
     40}
     41
     42int
     43nvkm_ltc_zbc_color_get(struct nvkm_ltc *ltc, int index, const u32 color[4])
     44{
     45	memcpy(ltc->zbc_color[index], color, sizeof(ltc->zbc_color[index]));
     46	ltc->func->zbc_clear_color(ltc, index, color);
     47	return index;
     48}
     49
     50int
     51nvkm_ltc_zbc_depth_get(struct nvkm_ltc *ltc, int index, const u32 depth)
     52{
     53	ltc->zbc_depth[index] = depth;
     54	ltc->func->zbc_clear_depth(ltc, index, depth);
     55	return index;
     56}
     57
     58int
     59nvkm_ltc_zbc_stencil_get(struct nvkm_ltc *ltc, int index, const u32 stencil)
     60{
     61	ltc->zbc_stencil[index] = stencil;
     62	ltc->func->zbc_clear_stencil(ltc, index, stencil);
     63	return index;
     64}
     65
     66void
     67nvkm_ltc_invalidate(struct nvkm_ltc *ltc)
     68{
     69	if (ltc->func->invalidate)
     70		ltc->func->invalidate(ltc);
     71}
     72
     73void
     74nvkm_ltc_flush(struct nvkm_ltc *ltc)
     75{
     76	if (ltc->func->flush)
     77		ltc->func->flush(ltc);
     78}
     79
     80static void
     81nvkm_ltc_intr(struct nvkm_subdev *subdev)
     82{
     83	struct nvkm_ltc *ltc = nvkm_ltc(subdev);
     84	ltc->func->intr(ltc);
     85}
     86
     87static int
     88nvkm_ltc_oneinit(struct nvkm_subdev *subdev)
     89{
     90	struct nvkm_ltc *ltc = nvkm_ltc(subdev);
     91	return ltc->func->oneinit(ltc);
     92}
     93
     94static int
     95nvkm_ltc_init(struct nvkm_subdev *subdev)
     96{
     97	struct nvkm_ltc *ltc = nvkm_ltc(subdev);
     98	int i;
     99
    100	for (i = ltc->zbc_min; i <= ltc->zbc_max; i++) {
    101		ltc->func->zbc_clear_color(ltc, i, ltc->zbc_color[i]);
    102		ltc->func->zbc_clear_depth(ltc, i, ltc->zbc_depth[i]);
    103		if (ltc->func->zbc_clear_stencil)
    104			ltc->func->zbc_clear_stencil(ltc, i, ltc->zbc_stencil[i]);
    105	}
    106
    107	ltc->func->init(ltc);
    108	return 0;
    109}
    110
    111static void *
    112nvkm_ltc_dtor(struct nvkm_subdev *subdev)
    113{
    114	struct nvkm_ltc *ltc = nvkm_ltc(subdev);
    115	nvkm_memory_unref(&ltc->tag_ram);
    116	mutex_destroy(&ltc->mutex);
    117	return ltc;
    118}
    119
    120static const struct nvkm_subdev_func
    121nvkm_ltc = {
    122	.dtor = nvkm_ltc_dtor,
    123	.oneinit = nvkm_ltc_oneinit,
    124	.init = nvkm_ltc_init,
    125	.intr = nvkm_ltc_intr,
    126};
    127
    128int
    129nvkm_ltc_new_(const struct nvkm_ltc_func *func, struct nvkm_device *device,
    130	      enum nvkm_subdev_type type, int inst, struct nvkm_ltc **pltc)
    131{
    132	struct nvkm_ltc *ltc;
    133
    134	if (!(ltc = *pltc = kzalloc(sizeof(*ltc), GFP_KERNEL)))
    135		return -ENOMEM;
    136
    137	nvkm_subdev_ctor(&nvkm_ltc, device, type, inst, &ltc->subdev);
    138	ltc->func = func;
    139	mutex_init(&ltc->mutex);
    140	ltc->zbc_min = 1; /* reserve 0 for disabled */
    141	ltc->zbc_max = min(func->zbc, NVKM_LTC_MAX_ZBC_CNT) - 1;
    142	return 0;
    143}