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

conn.c (3151B)

      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 <subdev/bios.h>
     25#include <subdev/bios/dcb.h>
     26#include <subdev/bios/conn.h>
     27
     28u32
     29nvbios_connTe(struct nvkm_bios *bios, u8 *ver, u8 *hdr, u8 *cnt, u8 *len)
     30{
     31	u32 dcb = dcb_table(bios, ver, hdr, cnt, len);
     32	if (dcb && *ver >= 0x30 && *hdr >= 0x16) {
     33		u32 data = nvbios_rd16(bios, dcb + 0x14);
     34		if (data) {
     35			*ver = nvbios_rd08(bios, data + 0);
     36			*hdr = nvbios_rd08(bios, data + 1);
     37			*cnt = nvbios_rd08(bios, data + 2);
     38			*len = nvbios_rd08(bios, data + 3);
     39			return data;
     40		}
     41	}
     42	return 0x00000000;
     43}
     44
     45u32
     46nvbios_connTp(struct nvkm_bios *bios, u8 *ver, u8 *hdr, u8 *cnt, u8 *len,
     47	      struct nvbios_connT *info)
     48{
     49	u32 data = nvbios_connTe(bios, ver, hdr, cnt, len);
     50	memset(info, 0x00, sizeof(*info));
     51	switch (!!data * *ver) {
     52	case 0x30:
     53	case 0x40:
     54		return data;
     55	default:
     56		break;
     57	}
     58	return 0x00000000;
     59}
     60
     61u32
     62nvbios_connEe(struct nvkm_bios *bios, u8 idx, u8 *ver, u8 *len)
     63{
     64	u8  hdr, cnt;
     65	u32 data = nvbios_connTe(bios, ver, &hdr, &cnt, len);
     66	if (data && idx < cnt)
     67		return data + hdr + (idx * *len);
     68	return 0x00000000;
     69}
     70
     71u32
     72nvbios_connEp(struct nvkm_bios *bios, u8 idx, u8 *ver, u8 *len,
     73	      struct nvbios_connE *info)
     74{
     75	u32 data = nvbios_connEe(bios, idx, ver, len);
     76	memset(info, 0x00, sizeof(*info));
     77	switch (!!data * *ver) {
     78	case 0x30:
     79	case 0x40:
     80		info->type     =  nvbios_rd08(bios, data + 0x00);
     81		info->location =  nvbios_rd08(bios, data + 0x01) & 0x0f;
     82		info->hpd      = (nvbios_rd08(bios, data + 0x01) & 0x30) >> 4;
     83		info->dp       = (nvbios_rd08(bios, data + 0x01) & 0xc0) >> 6;
     84		if (*len < 4)
     85			return data;
     86		info->hpd     |= (nvbios_rd08(bios, data + 0x02) & 0x03) << 2;
     87		info->dp      |=  nvbios_rd08(bios, data + 0x02) & 0x0c;
     88		info->di       = (nvbios_rd08(bios, data + 0x02) & 0xf0) >> 4;
     89		info->hpd     |= (nvbios_rd08(bios, data + 0x03) & 0x07) << 4;
     90		info->sr       = (nvbios_rd08(bios, data + 0x03) & 0x08) >> 3;
     91		info->lcdid    = (nvbios_rd08(bios, data + 0x03) & 0x70) >> 4;
     92		return data;
     93	default:
     94		break;
     95	}
     96	return 0x00000000;
     97}