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

boost.c (3628B)

      1/*
      2 * Copyright 2013 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 <subdev/bios.h>
     25#include <subdev/bios/bit.h>
     26#include <subdev/bios/boost.h>
     27
     28u32
     29nvbios_boostTe(struct nvkm_bios *bios,
     30	       u8 *ver, u8 *hdr, u8 *cnt, u8 *len, u8 *snr, u8 *ssz)
     31{
     32	struct bit_entry bit_P;
     33	u32 boost = 0;
     34
     35	if (!bit_entry(bios, 'P', &bit_P)) {
     36		if (bit_P.version == 2 && bit_P.length >= 0x34)
     37			boost = nvbios_rd32(bios, bit_P.offset + 0x30);
     38
     39		if (boost) {
     40			*ver = nvbios_rd08(bios, boost + 0);
     41			switch (*ver) {
     42			case 0x11:
     43				*hdr = nvbios_rd08(bios, boost + 1);
     44				*cnt = nvbios_rd08(bios, boost + 5);
     45				*len = nvbios_rd08(bios, boost + 2);
     46				*snr = nvbios_rd08(bios, boost + 4);
     47				*ssz = nvbios_rd08(bios, boost + 3);
     48				return boost;
     49			default:
     50				break;
     51			}
     52		}
     53	}
     54
     55	return 0;
     56}
     57
     58u32
     59nvbios_boostEe(struct nvkm_bios *bios, int idx,
     60	       u8 *ver, u8 *hdr, u8 *cnt, u8 *len)
     61{
     62	u8  snr, ssz;
     63	u32 data = nvbios_boostTe(bios, ver, hdr, cnt, len, &snr, &ssz);
     64	if (data && idx < *cnt) {
     65		data = data + *hdr + (idx * (*len + (snr * ssz)));
     66		*hdr = *len;
     67		*cnt = snr;
     68		*len = ssz;
     69		return data;
     70	}
     71	return 0;
     72}
     73
     74u32
     75nvbios_boostEp(struct nvkm_bios *bios, int idx,
     76	       u8 *ver, u8 *hdr, u8 *cnt, u8 *len, struct nvbios_boostE *info)
     77{
     78	u32 data = nvbios_boostEe(bios, idx, ver, hdr, cnt, len);
     79	memset(info, 0x00, sizeof(*info));
     80	if (data) {
     81		info->pstate = (nvbios_rd16(bios, data + 0x00) & 0x01e0) >> 5;
     82		info->min    =  nvbios_rd16(bios, data + 0x02) * 1000;
     83		info->max    =  nvbios_rd16(bios, data + 0x04) * 1000;
     84	}
     85	return data;
     86}
     87
     88u32
     89nvbios_boostEm(struct nvkm_bios *bios, u8 pstate,
     90	       u8 *ver, u8 *hdr, u8 *cnt, u8 *len, struct nvbios_boostE *info)
     91{
     92	u32 data, idx = 0;
     93	while ((data = nvbios_boostEp(bios, idx++, ver, hdr, cnt, len, info))) {
     94		if (info->pstate == pstate)
     95			break;
     96	}
     97	return data;
     98}
     99
    100u32
    101nvbios_boostSe(struct nvkm_bios *bios, int idx,
    102	       u32 data, u8 *ver, u8 *hdr, u8 cnt, u8 len)
    103{
    104	if (data && idx < cnt) {
    105		data = data + *hdr + (idx * len);
    106		*hdr = len;
    107		return data;
    108	}
    109	return 0;
    110}
    111
    112u32
    113nvbios_boostSp(struct nvkm_bios *bios, int idx,
    114	       u32 data, u8 *ver, u8 *hdr, u8 cnt, u8 len,
    115	       struct nvbios_boostS *info)
    116{
    117	data = nvbios_boostSe(bios, idx, data, ver, hdr, cnt, len);
    118	memset(info, 0x00, sizeof(*info));
    119	if (data) {
    120		info->domain  = nvbios_rd08(bios, data + 0x00);
    121		info->percent = nvbios_rd08(bios, data + 0x01);
    122		info->min     = nvbios_rd16(bios, data + 0x02) * 1000;
    123		info->max     = nvbios_rd16(bios, data + 0x04) * 1000;
    124	}
    125	return data;
    126}