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

gf100.c (2116B)

      1/*
      2 * Copyright 2016 Karol Herbst
      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: Karol Herbst
     23 */
     24#include "priv.h"
     25
     26#include <subdev/fuse.h>
     27
     28static int
     29gf100_volt_speedo_read(struct nvkm_volt *volt)
     30{
     31	struct nvkm_device *device = volt->subdev.device;
     32	struct nvkm_fuse *fuse = device->fuse;
     33
     34	if (!fuse)
     35		return -EINVAL;
     36
     37	return nvkm_fuse_read(fuse, 0x1cc);
     38}
     39
     40int
     41gf100_volt_oneinit(struct nvkm_volt *volt)
     42{
     43	struct nvkm_subdev *subdev = &volt->subdev;
     44	if (volt->speedo <= 0)
     45		nvkm_error(subdev, "couldn't find speedo value, volting not "
     46			   "possible\n");
     47	return 0;
     48}
     49
     50static const struct nvkm_volt_func
     51gf100_volt = {
     52	.oneinit = gf100_volt_oneinit,
     53	.vid_get = nvkm_voltgpio_get,
     54	.vid_set = nvkm_voltgpio_set,
     55	.speedo_read = gf100_volt_speedo_read,
     56};
     57
     58int
     59gf100_volt_new(struct nvkm_device *device, enum nvkm_subdev_type type, int inst,
     60	       struct nvkm_volt **pvolt)
     61{
     62	struct nvkm_volt *volt;
     63	int ret;
     64
     65	ret = nvkm_volt_new_(&gf100_volt, device, type, inst, &volt);
     66	*pvolt = volt;
     67	if (ret)
     68		return ret;
     69
     70	return nvkm_voltgpio_init(volt);
     71}