1/* $NetBSD: nouveau_nvkm_subdev_bios_vmap.c,v 1.3 2021/12/18 23:45:38 riastradh Exp $ */ 2 3/* 4 * Copyright 2012 Nouveau Community 5 * 6 * Permission is hereby granted, free of charge, to any person obtaining a 7 * copy of this software and associated documentation files (the "Software"), 8 * to deal in the Software without restriction, including without limitation 9 * the rights to use, copy, modify, merge, publish, distribute, sublicense, 10 * and/or sell copies of the Software, and to permit persons to whom the 11 * Software is furnished to do so, subject to the following conditions: 12 * 13 * The above copyright notice and this permission notice shall be included in 14 * all copies or substantial portions of the Software. 15 * 16 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR 17 * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, 18 * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL 19 * THE COPYRIGHT HOLDER(S) OR AUTHOR(S) BE LIABLE FOR ANY CLAIM, DAMAGES OR 20 * OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, 21 * ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR 22 * OTHER DEALINGS IN THE SOFTWARE. 23 * 24 * Authors: Martin Peres 25 */ 26#include <sys/cdefs.h> 27__KERNEL_RCSID(0, "$NetBSD: nouveau_nvkm_subdev_bios_vmap.c,v 1.3 2021/12/18 23:45:38 riastradh Exp $"); 28 29#include <subdev/bios.h> 30#include <subdev/bios/bit.h> 31#include <subdev/bios/vmap.h> 32 33u32 34nvbios_vmap_table(struct nvkm_bios *bios, u8 *ver, u8 *hdr, u8 *cnt, u8 *len) 35{ 36 struct bit_entry bit_P; 37 u32 vmap = 0; 38 39 if (!bit_entry(bios, 'P', &bit_P)) { 40 if (bit_P.version == 2) { 41 vmap = nvbios_rd32(bios, bit_P.offset + 0x20); 42 if (vmap) { 43 *ver = nvbios_rd08(bios, vmap + 0); 44 switch (*ver) { 45 case 0x10: 46 case 0x20: 47 *hdr = nvbios_rd08(bios, vmap + 1); 48 *cnt = nvbios_rd08(bios, vmap + 3); 49 *len = nvbios_rd08(bios, vmap + 2); 50 return vmap; 51 default: 52 break; 53 } 54 } 55 } 56 } 57 58 return 0; 59} 60 61u32 62nvbios_vmap_parse(struct nvkm_bios *bios, u8 *ver, u8 *hdr, u8 *cnt, u8 *len, 63 struct nvbios_vmap *info) 64{ 65 u32 vmap = nvbios_vmap_table(bios, ver, hdr, cnt, len); 66 memset(info, 0x00, sizeof(*info)); 67 switch (!!vmap * *ver) { 68 case 0x10: 69 info->max0 = 0xff; 70 info->max1 = 0xff; 71 info->max2 = 0xff; 72 break; 73 case 0x20: 74 info->max0 = nvbios_rd08(bios, vmap + 0x7); 75 info->max1 = nvbios_rd08(bios, vmap + 0x8); 76 if (*len >= 0xc) 77 info->max2 = nvbios_rd08(bios, vmap + 0xc); 78 else 79 info->max2 = 0xff; 80 break; 81 } 82 return vmap; 83} 84 85u32 86nvbios_vmap_entry(struct nvkm_bios *bios, int idx, u8 *ver, u8 *len) 87{ 88 u8 hdr, cnt; 89 u32 vmap = nvbios_vmap_table(bios, ver, &hdr, &cnt, len); 90 if (vmap && idx < cnt) { 91 vmap = vmap + hdr + (idx * *len); 92 return vmap; 93 } 94 return 0; 95} 96 97u32 98nvbios_vmap_entry_parse(struct nvkm_bios *bios, int idx, u8 *ver, u8 *len, 99 struct nvbios_vmap_entry *info) 100{ 101 u32 vmap = nvbios_vmap_entry(bios, idx, ver, len); 102 memset(info, 0x00, sizeof(*info)); 103 switch (!!vmap * *ver) { 104 case 0x10: 105 info->link = 0xff; 106 info->min = nvbios_rd32(bios, vmap + 0x00); 107 info->max = nvbios_rd32(bios, vmap + 0x04); 108 info->arg[0] = nvbios_rd32(bios, vmap + 0x08); 109 info->arg[1] = nvbios_rd32(bios, vmap + 0x0c); 110 info->arg[2] = nvbios_rd32(bios, vmap + 0x10); 111 break; 112 case 0x20: 113 info->mode = nvbios_rd08(bios, vmap + 0x00); 114 info->link = nvbios_rd08(bios, vmap + 0x01); 115 info->min = nvbios_rd32(bios, vmap + 0x02); 116 info->max = nvbios_rd32(bios, vmap + 0x06); 117 info->arg[0] = nvbios_rd32(bios, vmap + 0x0a); 118 info->arg[1] = nvbios_rd32(bios, vmap + 0x0e); 119 info->arg[2] = nvbios_rd32(bios, vmap + 0x12); 120 info->arg[3] = nvbios_rd32(bios, vmap + 0x16); 121 info->arg[4] = nvbios_rd32(bios, vmap + 0x1a); 122 info->arg[5] = nvbios_rd32(bios, vmap + 0x1e); 123 break; 124 } 125 return vmap; 126} 127