payloads/coreinfo/pci_module.c

   1 /* SPDX-License-Identifier: GPL-2.0-only */
   2
   3 #include <arch/io.h>
   4 #include <pci.h>
   5 #include <libpayload.h>
   6 #include "coreinfo.h"
   7
   8 #if CONFIG(MODULE_PCI)
   9
  10 struct pci_devices {
  11         pcidev_t device;
  12         unsigned int id;
  13 };
  14
  15 #define MAX_PCI_DEVICES 64
  16 static struct pci_devices devices[MAX_PCI_DEVICES];
  17 static int devices_index;
  18
  19 /* Number of entries to show in the list */
  20 #define MENU_VISIBLE 16
  21
  22 static int menu_selected = 0;
  23 static int menu_first = 0;
  24
  25 static void swap(struct pci_devices *a, struct pci_devices *b)
  26 {
  27         struct pci_devices tmp;
  28
  29         tmp.device = a->device;
  30         tmp.id = a->id;
  31
  32         a->device = b->device;
  33         a->id = b->id;
  34
  35         b->device = tmp.device;
  36         b->id = tmp.id;
  37 }
  38
  39 static int partition(struct pci_devices *list, int len)
  40 {
  41         pcidev_t val = list[len / 2].device;
  42         int index = 0;
  43         int i;
  44
  45         swap(&list[len / 2], &list[len - 1]);
  46
  47         for (i = 0; i < len - 1; i++) {
  48                 if (list[i].device < val) {
  49                         swap(&list[i], &list[index]);
  50                         index++;
  51                 }
  52         }
  53
  54         swap(&list[index], &list[len - 1]);
  55
  56         return index;
  57 }
  58
  59 static void quicksort(struct pci_devices *list, int len)
  60 {
  61         int index;
  62
  63         if (len <= 1)
  64                 return;
  65
  66         index = partition(list, len);
  67
  68         quicksort(list, index);
  69         quicksort(&(list[index]), len - index);
  70 }
  71
  72 static void show_config_space(WINDOW *win, int row, int col, int index)
  73 {
  74         unsigned char cspace[256];
  75         pcidev_t dev;
  76         int i, x, y;
  77
  78         dev = devices[index].device;
  79
  80         for (i = 0; i < 256; i ++)
  81                 cspace[i] = pci_read_config8(dev, i);
  82
  83         for (y = 0; y < 16; y++) {
  84                 for (x = 0; x < 16; x++)
  85                         mvwprintw(win, row + y, col + (x * 3), "%2.2X ",
  86                                   cspace[(y * 16) + x]);
  87         }
  88 }
  89
  90 static int pci_module_redraw(WINDOW *win)
  91 {
  92         unsigned int bus, slot, func;
  93         int i;
  94
  95         print_module_title(win, "PCI Device List");
  96
  97         for (i = 0; i < MENU_VISIBLE; i++) {
  98                 int item = menu_first + i;
  99
 100                 /* Draw a blank space. */
 101                 if (item >= devices_index) {
 102                         wattrset(win, COLOR_PAIR(2));
 103                         mvwprintw(win, 2 + i, 1, "                 ");
 104                         continue;
 105                 }
 106
 107                 bus = PCI_BUS(devices[item].device);
 108                 slot = PCI_SLOT(devices[item].device);
 109                 func = PCI_FUNC(devices[item].device);
 110
 111                 if (item == menu_selected)
 112                         wattrset(win, COLOR_PAIR(3) | A_BOLD);
 113                 else
 114                         wattrset(win, COLOR_PAIR(2));
 115
 116                 mvwprintw(win, 2 + i, 1, "%X:%2.2X.%2.2X %04X:%04X  ",
 117                           bus, slot, func,
 118                           devices[item].id & 0xffff,
 119                           (devices[item].id >> 16) & 0xffff);
 120
 121                 wattrset(win, COLOR_PAIR(2));
 122
 123                 if (i == 0) {
 124                         if (item != 0)
 125                                 mvwaddch(win, 2 + i, 19, ACS_UARROW);
 126                 }
 127                 if (i == MENU_VISIBLE - 1) {
 128                         if ((item + 1) < devices_index)
 129                                 mvwaddch(win, 2 + i, 19, ACS_DARROW);
 130                 }
 131         }
 132
 133         wattrset(win, COLOR_PAIR(2));
 134
 135         for (i = 0; i < 16; i++)
 136                 mvwprintw(win, 2, 26 + (i * 3), "%2.2X ", i);
 137
 138         wmove(win, 3, 25);
 139
 140         for (i = 0; i < 48; i++)
 141                 waddch(win, (i == 0) ? ACS_ULCORNER : ACS_HLINE);
 142
 143         for (i = 0; i < 16; i++) {
 144                 mvwprintw(win, 4 + i, 23, "%2.2X", i * 16);
 145                 wmove(win, 4 + i, 25);
 146                 waddch(win, ACS_VLINE);
 147         }
 148
 149         show_config_space(win, 4, 26, menu_selected);
 150
 151         return 0;
 152 }
 153
 154 static void ci_pci_scan_bus(int bus)
 155 {
 156         int slot, func;
 157         unsigned int val;
 158         unsigned char hdr;
 159
 160         for (slot = 0; slot < 0x20; slot++) {
 161                 for (func = 0; func < 8; func++) {
 162                         pcidev_t dev = PCI_DEV(bus, slot, func);
 163
 164                         val = pci_read_config32(dev, REG_VENDOR_ID);
 165
 166                         /* Nobody home. */
 167                         if (val == 0xffffffff || val == 0x00000000 ||
 168                             val == 0x0000ffff || val == 0xffff0000) {
 169
 170                                 /* If function 0 is not present, no need
 171                                  * to test other functions. */
 172                                 if (func == 0)
 173                                         func = 8;
 174                                 continue;
 175                         }
 176
 177                         /* FIXME: Remove this arbitrary limitation. */
 178                         if (devices_index >= MAX_PCI_DEVICES)
 179                                 return;
 180
 181                         devices[devices_index].device =
 182                             PCI_DEV(bus, slot, func);
 183
 184                         devices[devices_index++].id = val;
 185
 186                         /* If this is a bridge, then follow it. */
 187                         hdr = pci_read_config8(dev, REG_HEADER_TYPE);
 188
 189                         if ((func == 0) && !(hdr & HEADER_TYPE_MULTIFUNCTION))
 190                                 func = 8;
 191
 192                         hdr &= ~HEADER_TYPE_MULTIFUNCTION;
 193                         if (hdr == HEADER_TYPE_BRIDGE ||
 194                             hdr == HEADER_TYPE_CARDBUS) {
 195                                 unsigned int busses;
 196
 197                                 busses = pci_read_config32(dev, REG_PRIMARY_BUS);
 198
 199                                 ci_pci_scan_bus((busses >> 8) & 0xff);
 200
 201                         }
 202                 }
 203         }
 204
 205         quicksort(devices, devices_index);
 206 }
 207
 208 static int pci_module_handle(int key)
 209 {
 210         int ret = 0;
 211
 212         switch (key) {
 213         case KEY_DOWN:
 214                 if (menu_selected + 1 < devices_index) {
 215                         menu_selected++;
 216                         ret = 1;
 217                 }
 218                 break;
 219         case KEY_UP:
 220                 if (menu_selected > 0) {
 221                         menu_selected--;
 222                         ret = 1;
 223                 }
 224                 break;
 225         }
 226
 227         if (!ret)
 228                 return ret;
 229
 230         if (menu_selected < menu_first)
 231                 menu_first = menu_selected;
 232         else if (menu_selected >= menu_first + MENU_VISIBLE) {
 233                 menu_first = menu_selected - (MENU_VISIBLE - 1);
 234                 if (menu_first < 0)
 235                         menu_first = 0;
 236         }
 237
 238         return ret;
 239 }
 240
 241 static int pci_module_init(void)
 242 {
 243         ci_pci_scan_bus(0);
 244         return 0;
 245 }
 246
 247 struct coreinfo_module pci_module = {
 248         .name = "PCI",
 249         .init = pci_module_init,
 250         .redraw = pci_module_redraw,
 251         .handle = pci_module_handle,
 252 };
 253
 254 #else
 255
 256 struct coreinfo_module pci_module = {
 257 };
 258
 259 #endif