diff options
Diffstat (limited to 'ls-map.c')
| -rw-r--r-- | ls-map.c | 184 |
1 files changed, 184 insertions, 0 deletions
diff --git a/ls-map.c b/ls-map.c new file mode 100644 index 0000000..a77eb0c --- /dev/null +++ b/ls-map.c @@ -0,0 +1,184 @@ +/* + * The PCI Utilities -- Bus Mapping Mode + * + * Copyright (c) 1997--2008 Martin Mares <mj@ucw.cz> + * + * Can be freely distributed and used under the terms of the GNU GPL v2+. + * + * SPDX-License-Identifier: GPL-2.0-or-later + */ + +#include <stdio.h> +#include <string.h> +#include <stdlib.h> + +#include "lspci.h" + +struct bus_bridge { + struct bus_bridge *next; + byte this, dev, func, first, last, bug; +}; + +struct bus_info { + byte exists; + byte guestbook; + struct bus_bridge *bridges, *via; +}; + +static struct bus_info *bus_info; + +static void +map_bridge(struct bus_info *bi, struct device *d, int np, int ns, int nl) +{ + struct bus_bridge *b = xmalloc(sizeof(struct bus_bridge)); + struct pci_dev *p = d->dev; + + b->next = bi->bridges; + bi->bridges = b; + b->this = get_conf_byte(d, np); + b->dev = p->dev; + b->func = p->func; + b->first = get_conf_byte(d, ns); + b->last = get_conf_byte(d, nl); + printf("## %02x:%02x.%d is a bridge from %02x to %02x-%02x\n", + p->bus, p->dev, p->func, b->this, b->first, b->last); + if (b->this != p->bus) + printf("!!! Bridge points to invalid primary bus.\n"); + if (b->first > b->last) + { + printf("!!! Bridge points to invalid bus range.\n"); + b->last = b->first; + } +} + +static void +do_map_bus(int bus) +{ + int domain = (filter.domain >= 0 ? filter.domain : 0); + int dev, func; + int verbose = pacc->debugging; + struct bus_info *bi = bus_info + bus; + struct device *d; + + if (verbose) + printf("Mapping bus %04x:%02x\n", domain, bus); + for (dev = 0; dev < 32; dev++) + if (filter.slot < 0 || filter.slot == dev) + { + int func_limit = 1; + for (func = 0; func < func_limit; func++) + if (filter.func < 0 || filter.func == func) + { + struct pci_dev *p = pci_get_dev(pacc, domain, bus, dev, func); + u16 vendor = pci_read_word(p, PCI_VENDOR_ID); + if (vendor && vendor != 0xffff) + { + if (!func && (pci_read_byte(p, PCI_HEADER_TYPE) & 0x80)) + func_limit = 8; + if (verbose) + printf("Discovered device %04x:%02x:%02x.%d\n", domain, bus, dev, func); + bi->exists = 1; + if (d = scan_device(p)) + { + show_device(d); + switch (get_conf_byte(d, PCI_HEADER_TYPE) & 0x7f) + { + case PCI_HEADER_TYPE_BRIDGE: + map_bridge(bi, d, PCI_PRIMARY_BUS, PCI_SECONDARY_BUS, PCI_SUBORDINATE_BUS); + break; + case PCI_HEADER_TYPE_CARDBUS: + map_bridge(bi, d, PCI_CB_PRIMARY_BUS, PCI_CB_CARD_BUS, PCI_CB_SUBORDINATE_BUS); + break; + } + free(d); + } + else if (verbose) + printf("But it was filtered out.\n"); + } + pci_free_dev(p); + } + } +} + +static void +do_map_bridges(int bus, int min, int max) +{ + struct bus_info *bi = bus_info + bus; + struct bus_bridge *b; + + bi->guestbook = 1; + for (b=bi->bridges; b; b=b->next) + { + if (bus_info[b->first].guestbook) + b->bug = 1; + else if (b->first < min || b->last > max) + b->bug = 2; + else + { + bus_info[b->first].via = b; + do_map_bridges(b->first, b->first, b->last); + } + } +} + +static void +map_bridges(void) +{ + int i; + + printf("\nSummary of buses:\n\n"); + for (i=0; i<256; i++) + if (bus_info[i].exists && !bus_info[i].guestbook) + do_map_bridges(i, 0, 255); + for (i=0; i<256; i++) + { + struct bus_info *bi = bus_info + i; + struct bus_bridge *b = bi->via; + + if (bi->exists) + { + printf("%02x: ", i); + if (b) + printf("Entered via %02x:%02x.%d\n", b->this, b->dev, b->func); + else if (!i) + printf("Primary host bus\n"); + else + printf("Secondary host bus (?)\n"); + } + for (b=bi->bridges; b; b=b->next) + { + printf("\t%02x.%d Bridge to %02x-%02x", b->dev, b->func, b->first, b->last); + switch (b->bug) + { + case 1: + printf(" <overlap bug>"); + break; + case 2: + printf(" <crossing bug>"); + break; + } + putchar('\n'); + } + } +} + +void +map_the_bus(void) +{ + if (pacc->method == PCI_ACCESS_PROC_BUS_PCI || + pacc->method == PCI_ACCESS_SYS_BUS_PCI || + pacc->method == PCI_ACCESS_WIN32_CFGMGR32 || + pacc->method == PCI_ACCESS_DUMP) + printf("WARNING: Bus mapping can be reliable only with direct hardware access enabled.\n\n"); + bus_info = xmalloc(sizeof(struct bus_info) * 256); + memset(bus_info, 0, sizeof(struct bus_info) * 256); + if (filter.bus >= 0) + do_map_bus(filter.bus); + else + { + int bus; + for (bus=0; bus<256; bus++) + do_map_bus(bus); + } + map_bridges(); +} |