payloads/coreinfo/pci_module.c

   1 /*
   2  * This file is part of the coreinfo project.
   3  *
   4  * Copyright (C) 2008 Advanced Micro Devices, Inc.
   5  *
   6  * This program is free software; you can redistribute it and/or modify
   7  * it under the terms of the GNU General Public License as published by
   8  * the Free Software Foundation; version 2 of the License.
   9  *
  10  * This program is distributed in the hope that it will be useful,
  11  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  12  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  13  * GNU General Public License for more details.
  14  */
  15
  16 #include <arch/io.h>
  17 #include <pci.h>
  18 #include <libpayload.h>
  19 #include "coreinfo.h"
  20
  21 #if IS_ENABLED(CONFIG_MODULE_PCI)
  22
  23 struct pci_devices {
  24         pcidev_t device;
  25         unsigned int id;
  26 };
  27
  28 #define MAX_PCI_DEVICES 64
  29 static struct pci_devices devices[MAX_PCI_DEVICES];
  30 static int devices_index;
  31
  32 /* Number of entries to show in the list */
  33 #define MENU_VISIBLE 16
  34
  35 static int menu_selected = 0;
  36 static int menu_first = 0;
  37
  38 static void swap(struct pci_devices *a, struct pci_devices *b)
  39 {
  40         struct pci_devices tmp;
  41
  42         tmp.device = a->device;
  43         tmp.id = a->id;
  44
  45         a->device = b->device;
  46         a->id = b->id;
  47
  48         b->device = tmp.device;
  49         b->id = tmp.id;
  50 }
  51
  52 static int partition(struct pci_devices *list, int len)
  53 {
  54         int val = list[len / 2].device;
  55         int index = 0;
  56         int i;
  57
  58         swap(&list[len / 2], &list[len - 1]);
  59
  60         for (i = 0; i < len - 1; i++) {
  61                 if (list[i].device < val) {
  62                         swap(&list[i], &list[index]);
  63                         index++;
  64                 }
  65         }
  66
  67         swap(&list[index], &list[len - 1]);
  68
  69         return index;
  70 }
  71
  72 static void quicksort(struct pci_devices *list, int len)
  73 {
  74         int index;
  75
  76         if (len <= 1)
  77                 return;
  78
  79         index = partition(list, len);
  80
  81         quicksort(list, index);
  82         quicksort(&(list[index]), len - index);
  83 }
  84
  85 static void show_config_space(WINDOW *win, int row, int col, int index)
  86 {
  87         unsigned char cspace[256];
  88         pcidev_t dev;
  89         int i, x, y;
  90
  91         dev = devices[index].device;
  92
  93         for (i = 0; i < 256; i ++)
  94                 cspace[i] = pci_read_config8(dev, i);
  95
  96         for (y = 0; y < 16; y++) {
  97                 for (x = 0; x < 16; x++)
  98                         mvwprintw(win, row + y, col + (x * 3), "%2.2X ",
  99                                   cspace[(y * 16) + x]);
 100         }
 101 }
 102
 103 static int pci_module_redraw(WINDOW *win)
 104 {
 105         unsigned int bus, slot, func;
 106         int i, last;
 107
 108         print_module_title(win, "PCI Device List");
 109
 110         last = menu_first + MENU_VISIBLE;
 111
 112         if (last > devices_index)
 113                 last = devices_index;
 114
 115         for (i = 0; i < MENU_VISIBLE; i++) {
 116                 int item = menu_first + i;
 117
 118                 /* Draw a blank space. */
 119                 if (item >= devices_index) {
 120                         wattrset(win, COLOR_PAIR(2));
 121                         mvwprintw(win, 2 + i, 1, "                 ");
 122                         continue;
 123                 }
 124
 125                 bus = PCI_BUS(devices[item].device);
 126                 slot = PCI_SLOT(devices[item].device);
 127                 func = PCI_FUNC(devices[item].device);
 128
 129                 if (item == menu_selected)
 130                         wattrset(win, COLOR_PAIR(3) | A_BOLD);
 131                 else
 132                         wattrset(win, COLOR_PAIR(2));
 133
 134                 mvwprintw(win, 2 + i, 1, "%X:%2.2X.%2.2X %04X:%04X  ",
 135                           bus, slot, func,
 136                           devices[item].id & 0xffff,
 137                           (devices[item].id >> 16) & 0xffff);
 138
 139                 wattrset(win, COLOR_PAIR(2));
 140
 141                 if (i == 0) {
 142                         if (item != 0)
 143                                 mvwaddch(win, 2 + i, 19, ACS_UARROW);
 144                 }
 145                 if (i == MENU_VISIBLE - 1) {
 146                         if ((item + 1) < devices_index)
 147                                 mvwaddch(win, 2 + i, 19, ACS_DARROW);
 148                 }
 149         }
 150
 151         wattrset(win, COLOR_PAIR(2));
 152
 153         for (i = 0; i < 16; i++)
 154                 mvwprintw(win, 2, 26 + (i * 3), "%2.2X ", i);
 155
 156         wmove(win, 3, 25);
 157
 158         for (i = 0; i < 48; i++)
 159                 waddch(win, (i == 0) ? ACS_ULCORNER : ACS_HLINE);
 160
 161         for (i = 0; i < 16; i++) {
 162                 mvwprintw(win, 4 + i, 23, "%2.2X", i * 16);
 163                 wmove(win, 4 + i, 25);
 164                 waddch(win, ACS_VLINE);
 165         }
 166
 167         show_config_space(win, 4, 26, menu_selected);
 168
 169         return 0;
 170 }
 171
 172 static void pci_scan_bus(int bus)
 173 {
 174         int slot, func;
 175         unsigned int val;
 176         unsigned char hdr;
 177
 178         for (slot = 0; slot < 0x20; slot++) {
 179                 for (func = 0; func < 8; func++) {
 180                         pcidev_t dev = PCI_DEV(bus, slot, func);
 181
 182                         val = pci_read_config32(dev, REG_VENDOR_ID);
 183
 184                         /* Nobody home. */
 185                         if (val == 0xffffffff || val == 0x00000000 ||
 186                             val == 0x0000ffff || val == 0xffff0000) {
 187
 188                                 /* If function 0 is not present, no need
 189                                  * to test other functions. */
 190                                 if (func == 0)
 191                                         func = 8;
 192                                 continue;
 193                         }
 194
 195                         /* FIXME: Remove this arbitrary limitation. */
 196                         if (devices_index >= MAX_PCI_DEVICES)
 197                                 return;
 198
 199                         devices[devices_index].device =
 200                             PCI_DEV(bus, slot, func);
 201
 202                         devices[devices_index++].id = val;
 203
 204                         /* If this is a bridge, then follow it. */
 205                         hdr = pci_read_config8(dev, REG_HEADER_TYPE);
 206
 207                         if ((func == 0) && !(hdr & HEADER_TYPE_MULTIFUNCTION))
 208                                 func = 8;
 209
 210                         hdr &= ~HEADER_TYPE_MULTIFUNCTION;
 211                         if (hdr == HEADER_TYPE_BRIDGE ||
 212                             hdr == HEADER_TYPE_CARDBUS) {
 213                                 unsigned int busses;
 214
 215                                 busses = pci_read_config32(dev, REG_PRIMARY_BUS);
 216
 217                                 pci_scan_bus((busses >> 8) & 0xff);
 218
 219                         }
 220                 }
 221         }
 222
 223         quicksort(devices, devices_index);
 224 }
 225
 226 static int pci_module_handle(int key)
 227 {
 228         int ret = 0;
 229
 230         switch (key) {
 231         case KEY_DOWN:
 232                 if (menu_selected + 1 < devices_index) {
 233                         menu_selected++;
 234                         ret = 1;
 235                 }
 236                 break;
 237         case KEY_UP:
 238                 if (menu_selected > 0) {
 239                         menu_selected--;
 240                         ret = 1;
 241                 }
 242                 break;
 243         }
 244
 245         if (!ret)
 246                 return ret;
 247
 248         if (menu_selected < menu_first)
 249                 menu_first = menu_selected;
 250         else if (menu_selected >= menu_first + MENU_VISIBLE) {
 251                 menu_first = menu_selected - (MENU_VISIBLE - 1);
 252                 if (menu_first < 0)
 253                         menu_first = 0;
 254         }
 255
 256         return ret;
 257 }
 258
 259 static int pci_module_init(void)
 260 {
 261         pci_scan_bus(0);
 262         return 0;
 263 }
 264
 265 struct coreinfo_module pci_module = {
 266         .name = "PCI",
 267         .init = pci_module_init,
 268         .redraw = pci_module_redraw,
 269         .handle = pci_module_handle,
 270 };
 271
 272 #else
 273
 274 struct coreinfo_module pci_module = {
 275 };
 276
 277 #endif