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

M0209.c (3926B)

      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/M0209.h>
     27
     28u32
     29nvbios_M0209Te(struct nvkm_bios *bios,
     30	       u8 *ver, u8 *hdr, u8 *cnt, u8 *len, u8 *snr, u8 *ssz)
     31{
     32	struct bit_entry bit_M;
     33	u32 data = 0x00000000;
     34
     35	if (!bit_entry(bios, 'M', &bit_M)) {
     36		if (bit_M.version == 2 && bit_M.length > 0x0c)
     37			data = nvbios_rd32(bios, bit_M.offset + 0x09);
     38		if (data) {
     39			*ver = nvbios_rd08(bios, data + 0x00);
     40			switch (*ver) {
     41			case 0x10:
     42				*hdr = nvbios_rd08(bios, data + 0x01);
     43				*len = nvbios_rd08(bios, data + 0x02);
     44				*ssz = nvbios_rd08(bios, data + 0x03);
     45				*snr = 1;
     46				*cnt = nvbios_rd08(bios, data + 0x04);
     47				return data;
     48			default:
     49				break;
     50			}
     51		}
     52	}
     53
     54	return 0x00000000;
     55}
     56
     57u32
     58nvbios_M0209Ee(struct nvkm_bios *bios, int idx,
     59	       u8 *ver, u8 *hdr, u8 *cnt, u8 *len)
     60{
     61	u8  snr, ssz;
     62	u32 data = nvbios_M0209Te(bios, ver, hdr, cnt, len, &snr, &ssz);
     63	if (data && idx < *cnt) {
     64		data = data + *hdr + idx * (*len + (snr * ssz));
     65		*hdr = *len;
     66		*cnt = snr;
     67		*len = ssz;
     68		return data;
     69	}
     70	return 0x00000000;
     71}
     72
     73u32
     74nvbios_M0209Ep(struct nvkm_bios *bios, int idx,
     75	       u8 *ver, u8 *hdr, u8 *cnt, u8 *len, struct nvbios_M0209E *info)
     76{
     77	u32 data = nvbios_M0209Ee(bios, idx, ver, hdr, cnt, len);
     78	memset(info, 0x00, sizeof(*info));
     79	switch (!!data * *ver) {
     80	case 0x10:
     81		info->v00_40 = (nvbios_rd08(bios, data + 0x00) & 0x40) >> 6;
     82		info->bits   =  nvbios_rd08(bios, data + 0x00) & 0x3f;
     83		info->modulo =  nvbios_rd08(bios, data + 0x01);
     84		info->v02_40 = (nvbios_rd08(bios, data + 0x02) & 0x40) >> 6;
     85		info->v02_07 =  nvbios_rd08(bios, data + 0x02) & 0x07;
     86		info->v03    =  nvbios_rd08(bios, data + 0x03);
     87		return data;
     88	default:
     89		break;
     90	}
     91	return 0x00000000;
     92}
     93
     94u32
     95nvbios_M0209Se(struct nvkm_bios *bios, int ent, int idx, u8 *ver, u8 *hdr)
     96{
     97
     98	u8  cnt, len;
     99	u32 data = nvbios_M0209Ee(bios, ent, ver, hdr, &cnt, &len);
    100	if (data && idx < cnt) {
    101		data = data + *hdr + idx * len;
    102		*hdr = len;
    103		return data;
    104	}
    105	return 0x00000000;
    106}
    107
    108u32
    109nvbios_M0209Sp(struct nvkm_bios *bios, int ent, int idx, u8 *ver, u8 *hdr,
    110	       struct nvbios_M0209S *info)
    111{
    112	struct nvbios_M0209E M0209E;
    113	u8  cnt, len;
    114	u32 data = nvbios_M0209Ep(bios, ent, ver, hdr, &cnt, &len, &M0209E);
    115	if (data) {
    116		u32 i, data = nvbios_M0209Se(bios, ent, idx, ver, hdr);
    117		memset(info, 0x00, sizeof(*info));
    118		switch (!!data * *ver) {
    119		case 0x10:
    120			for (i = 0; i < ARRAY_SIZE(info->data); i++) {
    121				u32 bits = (i % M0209E.modulo) * M0209E.bits;
    122				u32 mask = (1ULL << M0209E.bits) - 1;
    123				u16  off = bits / 8;
    124				u8   mod = bits % 8;
    125				info->data[i] = nvbios_rd32(bios, data + off);
    126				info->data[i] = info->data[i] >> mod;
    127				info->data[i] = info->data[i] & mask;
    128			}
    129			return data;
    130		default:
    131			break;
    132		}
    133	}
    134	return 0x00000000;
    135}