/*
* The PCI Utilities -- Show Bus Tree
*
- * Copyright (c) 1997--2008 Martin Mares <mj@ucw.cz>
+ * Copyright (c) 1997--2020 Martin Mares <mj@ucw.cz>
*
* Can be freely distributed and used under the terms of the GNU GPL.
*/
+#include <stdarg.h>
#include <stdio.h>
#include <string.h>
#include "lspci.h"
-struct bridge {
- struct bridge *chain; /* Single-linked list of bridges */
- struct bridge *next, *child; /* Tree of bridges */
- struct bus *first_bus; /* List of buses connected to this bridge */
- unsigned int domain;
- unsigned int primary, secondary, subordinate; /* Bus numbers */
- struct device *br_dev;
-};
-
-struct bus {
- unsigned int domain;
- unsigned int number;
- struct bus *sibling;
- struct device *first_dev, **last_dev;
-};
-
-static struct bridge host_bridge = { NULL, NULL, NULL, NULL, 0, ~0, 0, ~0, NULL };
+struct bridge host_bridge = { NULL, NULL, NULL, NULL, 0, ~0, 0, ~0, NULL };
static struct bus *
find_bus(struct bridge *b, unsigned int domain, unsigned int n)
bus->sibling = b->first_bus;
bus->first_dev = NULL;
bus->last_dev = &bus->first_dev;
+ bus->parent_bridge = b;
b->first_bus = bus;
return bus;
}
{
struct bridge *c;
for (c=b->child; c; c=c->next)
- if (c->domain == p->domain && c->secondary <= p->bus && p->bus <= c->subordinate)
+ if (c->domain == (unsigned)p->domain && c->secondary <= p->bus && p->bus <= c->subordinate)
{
insert_dev(d, c);
return;
* and all devices on the new list have the same bus number.
*/
*bus->last_dev = d;
- bus->last_dev = &d->next;
- d->next = NULL;
+ bus->last_dev = &d->bus_next;
+ d->bus_next = NULL;
+ d->parent_bus = bus;
}
-static void
+void
grow_tree(void)
{
- struct device *d, *d2;
+ struct device *d;
struct bridge **last_br, *b;
/* Build list of bridges */
last_br = &host_bridge.chain;
for (d=first_dev; d; d=d->next)
{
- word class = d->dev->device_class;
+ struct pci_dev *dd = d->dev;
+ word class = dd->device_class;
byte ht = get_conf_byte(d, PCI_HEADER_TYPE) & 0x7f;
- if (class == PCI_CLASS_BRIDGE_PCI &&
+ if ((class >> 8) == PCI_BASE_CLASS_BRIDGE &&
(ht == PCI_HEADER_TYPE_BRIDGE || ht == PCI_HEADER_TYPE_CARDBUS))
{
b = xmalloc(sizeof(struct bridge));
- b->domain = d->dev->domain;
+ b->domain = dd->domain;
if (ht == PCI_HEADER_TYPE_BRIDGE)
{
b->primary = get_conf_byte(d, PCI_PRIMARY_BUS);
b->next = b->child = NULL;
b->first_bus = NULL;
b->br_dev = d;
+ d->bridge = b;
+ pacc->debug("Tree: bridge %04x:%02x:%02x.%d: %02x -> %02x-%02x\n",
+ dd->domain, dd->bus, dd->dev, dd->func,
+ b->primary, b->secondary, b->subordinate);
}
}
*last_br = NULL;
/* Create bus structs and link devices */
- for (d=first_dev; d;)
- {
- d2 = d->next;
- insert_dev(d, &host_bridge);
- d = d2;
- }
+ for (d=first_dev; d; d=d->next)
+ insert_dev(d, &host_bridge);
}
static void
static void show_tree_bridge(struct bridge *, char *, char *);
+#define LINE_BUF_SIZE 1024
+
+static char * FORMAT_CHECK(printf, 3, 4)
+tree_printf(char *line, char *p, char *fmt, ...)
+{
+ va_list args;
+ char *end = line + LINE_BUF_SIZE - 2;
+
+ if (p >= end)
+ return p;
+
+ va_start(args, fmt);
+ int res = vsnprintf(p, end - p, fmt, args);
+ if (res < 0)
+ {
+ /* Ancient C libraries return -1 on overflow */
+ p += strlen(p);
+ }
+ else
+ p += res;
+
+ va_end(args);
+ return p;
+}
+
static void
show_tree_dev(struct device *d, char *line, char *p)
{
struct bridge *b;
char namebuf[256];
- p += sprintf(p, "%02x.%x", q->dev, q->func);
+ p = tree_printf(line, p, "%02x.%x", q->dev, q->func);
for (b=&host_bridge; b; b=b->chain)
if (b->br_dev == d)
{
if (b->secondary == b->subordinate)
- p += sprintf(p, "-[%02x]-", b->secondary);
+ p = tree_printf(line, p, "-[%02x]-", b->secondary);
else
- p += sprintf(p, "-[%02x-%02x]-", b->secondary, b->subordinate);
+ p = tree_printf(line, p, "-[%02x-%02x]-", b->secondary, b->subordinate);
show_tree_bridge(b, line, p);
return;
}
if (verbose)
- p += sprintf(p, " %s",
- pci_lookup_name(pacc, namebuf, sizeof(namebuf),
- PCI_LOOKUP_VENDOR | PCI_LOOKUP_DEVICE,
- q->vendor_id, q->device_id));
+ p = tree_printf(line, p, " %s",
+ pci_lookup_name(pacc, namebuf, sizeof(namebuf),
+ PCI_LOOKUP_VENDOR | PCI_LOOKUP_DEVICE,
+ q->vendor_id, q->device_id));
print_it(line, p);
}
{
if (!b->first_dev)
print_it(line, p);
- else if (!b->first_dev->next)
+ else if (!b->first_dev->bus_next)
{
- *p++ = '-';
- *p++ = '-';
+ p = tree_printf(line, p, "--");
show_tree_dev(b->first_dev, line, p);
}
else
{
struct device *d = b->first_dev;
- while (d->next)
+ while (d->bus_next)
{
- p[0] = '+';
- p[1] = '-';
- show_tree_dev(d, line, p+2);
- d = d->next;
+ char *p2 = tree_printf(line, p, "+-");
+ show_tree_dev(d, line, p2);
+ d = d->bus_next;
}
- p[0] = '\\';
- p[1] = '-';
- show_tree_dev(d, line, p+2);
+ p = tree_printf(line, p, "\\-");
+ show_tree_dev(d, line, p);
}
}
if (!b->first_bus->sibling)
{
if (b == &host_bridge)
- p += sprintf(p, "[%04x:%02x]-", b->domain, b->first_bus->number);
+ p = tree_printf(line, p, "[%04x:%02x]-", b->domain, b->first_bus->number);
show_tree_bus(b->first_bus, line, p);
}
else
while (u->sibling)
{
- k = p + sprintf(p, "+-[%04x:%02x]-", u->domain, u->number);
+ k = tree_printf(line, p, "+-[%04x:%02x]-", u->domain, u->number);
show_tree_bus(u, line, k);
u = u->sibling;
}
- k = p + sprintf(p, "\\-[%04x:%02x]-", u->domain, u->number);
+ k = tree_printf(line, p, "\\-[%04x:%02x]-", u->domain, u->number);
show_tree_bus(u, line, k);
}
}
void
-show_forest(void)
+show_forest(struct pci_filter *filter)
{
- char line[256];
-
- grow_tree();
- show_tree_bridge(&host_bridge, line, line);
+ char line[LINE_BUF_SIZE];
+ if (filter == NULL)
+ show_tree_bridge(&host_bridge, line, line);
+ else
+ {
+ struct bridge *b;
+ for (b=&host_bridge; b; b=b->chain)
+ {
+ if (b->br_dev && pci_filter_match(filter, b->br_dev->dev))
+ {
+ struct pci_dev *d = b->br_dev->dev;
+ char *p = line;
+ p = tree_printf(line, p, "%04x:%02x:", d->domain_16, d->bus);
+ show_tree_dev(b->br_dev, line, p);
+ }
+ }
+ }
}
projects / pciutils.git / blobdiff