Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1 | /* |
Dave Jones | 835c34a | 2007-10-12 21:10:53 -0400 | [diff] [blame] | 2 | * IBM Summit-Specific Code |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3 | * |
| 4 | * Written By: Matthew Dobson, IBM Corporation |
| 5 | * |
| 6 | * Copyright (c) 2003 IBM Corp. |
| 7 | * |
| 8 | * All rights reserved. |
| 9 | * |
| 10 | * This program is free software; you can redistribute it and/or modify |
| 11 | * it under the terms of the GNU General Public License as published by |
| 12 | * the Free Software Foundation; either version 2 of the License, or (at |
| 13 | * your option) any later version. |
| 14 | * |
| 15 | * This program is distributed in the hope that it will be useful, but |
| 16 | * WITHOUT ANY WARRANTY; without even the implied warranty of |
| 17 | * MERCHANTABILITY OR FITNESS FOR A PARTICULAR PURPOSE, GOOD TITLE or |
| 18 | * NON INFRINGEMENT. See the GNU General Public License for more |
| 19 | * details. |
| 20 | * |
| 21 | * You should have received a copy of the GNU General Public License |
| 22 | * along with this program; if not, write to the Free Software |
| 23 | * Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA. |
| 24 | * |
| 25 | * Send feedback to <colpatch@us.ibm.com> |
| 26 | * |
| 27 | */ |
| 28 | |
| 29 | #include <linux/mm.h> |
| 30 | #include <linux/init.h> |
| 31 | #include <asm/io.h> |
Akinobu Mita | 356fa0c | 2008-04-19 23:55:20 +0900 | [diff] [blame] | 32 | #include <asm/bios_ebda.h> |
Yinghai Lu | e8c48ef | 2008-07-25 02:17:44 -0700 | [diff] [blame] | 33 | #include <asm/summit/mpparse.h> |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 34 | |
| 35 | static struct rio_table_hdr *rio_table_hdr __initdata; |
| 36 | static struct scal_detail *scal_devs[MAX_NUMNODES] __initdata; |
| 37 | static struct rio_detail *rio_devs[MAX_NUMNODES*4] __initdata; |
| 38 | |
Yinghai Lu | d49c428 | 2008-06-08 18:31:54 -0700 | [diff] [blame] | 39 | #ifndef CONFIG_X86_NUMAQ |
Alexey Starikovskiy | 037cab0 | 2008-03-11 22:55:48 +0300 | [diff] [blame] | 40 | static int mp_bus_id_to_node[MAX_MP_BUSSES] __initdata; |
Yinghai Lu | d49c428 | 2008-06-08 18:31:54 -0700 | [diff] [blame] | 41 | #endif |
Alexey Starikovskiy | 037cab0 | 2008-03-11 22:55:48 +0300 | [diff] [blame] | 42 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 43 | static int __init setup_pci_node_map_for_wpeg(int wpeg_num, int last_bus) |
| 44 | { |
| 45 | int twister = 0, node = 0; |
| 46 | int i, bus, num_buses; |
| 47 | |
Paolo Ciarrocchi | 60e1174 | 2008-02-22 23:09:34 +0100 | [diff] [blame] | 48 | for (i = 0; i < rio_table_hdr->num_rio_dev; i++) { |
| 49 | if (rio_devs[i]->node_id == rio_devs[wpeg_num]->owner_id) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 50 | twister = rio_devs[i]->owner_id; |
| 51 | break; |
| 52 | } |
| 53 | } |
Paolo Ciarrocchi | 60e1174 | 2008-02-22 23:09:34 +0100 | [diff] [blame] | 54 | if (i == rio_table_hdr->num_rio_dev) { |
Harvey Harrison | 77bf90e | 2008-03-03 11:37:23 -0800 | [diff] [blame] | 55 | printk(KERN_ERR "%s: Couldn't find owner Cyclone for Winnipeg!\n", __func__); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 56 | return last_bus; |
| 57 | } |
| 58 | |
Paolo Ciarrocchi | 60e1174 | 2008-02-22 23:09:34 +0100 | [diff] [blame] | 59 | for (i = 0; i < rio_table_hdr->num_scal_dev; i++) { |
| 60 | if (scal_devs[i]->node_id == twister) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 61 | node = scal_devs[i]->node_id; |
| 62 | break; |
| 63 | } |
| 64 | } |
Paolo Ciarrocchi | 60e1174 | 2008-02-22 23:09:34 +0100 | [diff] [blame] | 65 | if (i == rio_table_hdr->num_scal_dev) { |
Harvey Harrison | 77bf90e | 2008-03-03 11:37:23 -0800 | [diff] [blame] | 66 | printk(KERN_ERR "%s: Couldn't find owner Twister for Cyclone!\n", __func__); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 67 | return last_bus; |
| 68 | } |
| 69 | |
Paolo Ciarrocchi | 60e1174 | 2008-02-22 23:09:34 +0100 | [diff] [blame] | 70 | switch (rio_devs[wpeg_num]->type) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 71 | case CompatWPEG: |
Paolo Ciarrocchi | 60e1174 | 2008-02-22 23:09:34 +0100 | [diff] [blame] | 72 | /* |
| 73 | * The Compatibility Winnipeg controls the 2 legacy buses, |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 74 | * the 66MHz PCI bus [2 slots] and the 2 "extra" buses in case |
| 75 | * a PCI-PCI bridge card is used in either slot: total 5 buses. |
| 76 | */ |
| 77 | num_buses = 5; |
| 78 | break; |
| 79 | case AltWPEG: |
Paolo Ciarrocchi | 60e1174 | 2008-02-22 23:09:34 +0100 | [diff] [blame] | 80 | /* |
| 81 | * The Alternate Winnipeg controls the 2 133MHz buses [1 slot |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 82 | * each], their 2 "extra" buses, the 100MHz bus [2 slots] and |
| 83 | * the "extra" buses for each of those slots: total 7 buses. |
| 84 | */ |
| 85 | num_buses = 7; |
| 86 | break; |
| 87 | case LookOutAWPEG: |
| 88 | case LookOutBWPEG: |
Paolo Ciarrocchi | 60e1174 | 2008-02-22 23:09:34 +0100 | [diff] [blame] | 89 | /* |
| 90 | * A Lookout Winnipeg controls 3 100MHz buses [2 slots each] |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 91 | * & the "extra" buses for each of those slots: total 9 buses. |
| 92 | */ |
| 93 | num_buses = 9; |
| 94 | break; |
| 95 | default: |
Harvey Harrison | 77bf90e | 2008-03-03 11:37:23 -0800 | [diff] [blame] | 96 | printk(KERN_INFO "%s: Unsupported Winnipeg type!\n", __func__); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 97 | return last_bus; |
| 98 | } |
| 99 | |
Paolo Ciarrocchi | 60e1174 | 2008-02-22 23:09:34 +0100 | [diff] [blame] | 100 | for (bus = last_bus; bus < last_bus + num_buses; bus++) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 101 | mp_bus_id_to_node[bus] = node; |
| 102 | return bus; |
| 103 | } |
| 104 | |
| 105 | static int __init build_detail_arrays(void) |
| 106 | { |
| 107 | unsigned long ptr; |
| 108 | int i, scal_detail_size, rio_detail_size; |
| 109 | |
Paolo Ciarrocchi | 60e1174 | 2008-02-22 23:09:34 +0100 | [diff] [blame] | 110 | if (rio_table_hdr->num_scal_dev > MAX_NUMNODES) { |
Harvey Harrison | 77bf90e | 2008-03-03 11:37:23 -0800 | [diff] [blame] | 111 | printk(KERN_WARNING "%s: MAX_NUMNODES too low! Defined as %d, but system has %d nodes.\n", __func__, MAX_NUMNODES, rio_table_hdr->num_scal_dev); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 112 | return 0; |
| 113 | } |
| 114 | |
Paolo Ciarrocchi | 60e1174 | 2008-02-22 23:09:34 +0100 | [diff] [blame] | 115 | switch (rio_table_hdr->version) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 116 | default: |
Harvey Harrison | 77bf90e | 2008-03-03 11:37:23 -0800 | [diff] [blame] | 117 | printk(KERN_WARNING "%s: Invalid Rio Grande Table Version: %d\n", __func__, rio_table_hdr->version); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 118 | return 0; |
| 119 | case 2: |
| 120 | scal_detail_size = 11; |
| 121 | rio_detail_size = 13; |
| 122 | break; |
| 123 | case 3: |
| 124 | scal_detail_size = 12; |
| 125 | rio_detail_size = 15; |
| 126 | break; |
| 127 | } |
| 128 | |
| 129 | ptr = (unsigned long)rio_table_hdr + 3; |
Paolo Ciarrocchi | 60e1174 | 2008-02-22 23:09:34 +0100 | [diff] [blame] | 130 | for (i = 0; i < rio_table_hdr->num_scal_dev; i++, ptr += scal_detail_size) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 131 | scal_devs[i] = (struct scal_detail *)ptr; |
| 132 | |
Paolo Ciarrocchi | 60e1174 | 2008-02-22 23:09:34 +0100 | [diff] [blame] | 133 | for (i = 0; i < rio_table_hdr->num_rio_dev; i++, ptr += rio_detail_size) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 134 | rio_devs[i] = (struct rio_detail *)ptr; |
| 135 | |
| 136 | return 1; |
| 137 | } |
| 138 | |
| 139 | void __init setup_summit(void) |
| 140 | { |
| 141 | unsigned long ptr; |
| 142 | unsigned short offset; |
| 143 | int i, next_wpeg, next_bus = 0; |
| 144 | |
| 145 | /* The pointer to the EBDA is stored in the word @ phys 0x40E(40:0E) */ |
Akinobu Mita | 356fa0c | 2008-04-19 23:55:20 +0900 | [diff] [blame] | 146 | ptr = get_bios_ebda(); |
| 147 | ptr = (unsigned long)phys_to_virt(ptr); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 148 | |
| 149 | rio_table_hdr = NULL; |
| 150 | offset = 0x180; |
Paolo Ciarrocchi | 60e1174 | 2008-02-22 23:09:34 +0100 | [diff] [blame] | 151 | while (offset) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 152 | /* The block id is stored in the 2nd word */ |
Paolo Ciarrocchi | 60e1174 | 2008-02-22 23:09:34 +0100 | [diff] [blame] | 153 | if (*((unsigned short *)(ptr + offset + 2)) == 0x4752) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 154 | /* set the pointer past the offset & block id */ |
| 155 | rio_table_hdr = (struct rio_table_hdr *)(ptr + offset + 4); |
| 156 | break; |
| 157 | } |
| 158 | /* The next offset is stored in the 1st word. 0 means no more */ |
| 159 | offset = *((unsigned short *)(ptr + offset)); |
| 160 | } |
Paolo Ciarrocchi | 60e1174 | 2008-02-22 23:09:34 +0100 | [diff] [blame] | 161 | if (!rio_table_hdr) { |
Harvey Harrison | 77bf90e | 2008-03-03 11:37:23 -0800 | [diff] [blame] | 162 | printk(KERN_ERR "%s: Unable to locate Rio Grande Table in EBDA - bailing!\n", __func__); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 163 | return; |
| 164 | } |
| 165 | |
| 166 | if (!build_detail_arrays()) |
| 167 | return; |
| 168 | |
| 169 | /* The first Winnipeg we're looking for has an index of 0 */ |
| 170 | next_wpeg = 0; |
| 171 | do { |
Paolo Ciarrocchi | 60e1174 | 2008-02-22 23:09:34 +0100 | [diff] [blame] | 172 | for (i = 0; i < rio_table_hdr->num_rio_dev; i++) { |
| 173 | if (is_WPEG(rio_devs[i]) && rio_devs[i]->WP_index == next_wpeg) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 174 | /* It's the Winnipeg we're looking for! */ |
| 175 | next_bus = setup_pci_node_map_for_wpeg(i, next_bus); |
| 176 | next_wpeg++; |
| 177 | break; |
| 178 | } |
| 179 | } |
| 180 | /* |
| 181 | * If we go through all Rio devices and don't find one with |
| 182 | * the next index, it means we've found all the Winnipegs, |
| 183 | * and thus all the PCI buses. |
| 184 | */ |
| 185 | if (i == rio_table_hdr->num_rio_dev) |
| 186 | next_wpeg = 0; |
| 187 | } while (next_wpeg != 0); |
| 188 | } |