add /proc/pci, lspci
This commit is contained in:
K. Lange
parent
d5f6170991
commit
5a6cc6868a
131
apps/lspci.c
Normal file
131
apps/lspci.c
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@ -0,0 +1,131 @@
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/* vim: tabstop=4 shiftwidth=4 noexpandtab
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* This file is part of ToaruOS and is released under the terms
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* of the NCSA / University of Illinois License - see LICENSE.md
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* Copyright (C) 2018 K. Lange
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*
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* lspci - Print information about connected PCI devices.
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*
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*/
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#include <stdio.h>
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#include <unistd.h>
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#include <errno.h>
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#include <string.h>
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struct device_class {
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char * code;
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char * name;
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} device_classes[] = {
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{"0101", "IDE interface"},
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{"0102", "Floppy disk controller"},
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{"0105", "ATA controller"},
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{"0106", "SATA controller"},
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{"0200", "Ethernet controller"},
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{"0280", "Network controller"},
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{"0300", "VGA compatible controller"},
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{"0380", "Display controller"},
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{"0401", "Multimedia audio controller"},
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{"0403", "Audio device"},
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{"0480", "Multimedia controller"},
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{"0600", "Host bridge"},
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{"0601", "ISA bridge"},
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{"0680", "Bridge"},
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{"0880", "System peripheral"},
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{NULL, NULL},
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};
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static void show_usage(char * argv[]) {
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fprintf(stderr,
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"lspci - show information about PCI devices\n"
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"\n"
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"usage: %s [-n]\n"
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"\n"
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" -n \033[3mshow numeric device codes\033[0m\n"
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" -? \033[3mshow this help text\033[0m\n"
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"\n", argv[0]);
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}
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int main(int argc, char * argv[]) {
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int numeric = 0;
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int opt;
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while ((opt = getopt(argc, argv, "n?")) != -1) {
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switch (opt) {
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case '?':
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show_usage(argv);
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return 0;
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case 'n':
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numeric = 1;
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break;
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}
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}
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FILE * f = fopen("/proc/pci","r");
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if (!f) {
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fprintf(stderr, "%s: %s: %s\n", argv[0], "/proc/pci", strerror(errno));
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return 1;
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}
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while (!feof(f)) {
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char line[1024];
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fgets(line, 1024, f);
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if (line[0] == ' ') {
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/* Skip; don't care about this information */
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continue;
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}
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/* Read bus, etc. verbatim */
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char * device_bus = line;
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/* Read device class */
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char * device_class = strstr(line," (");
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if (!device_class) {
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fprintf(stderr, "%s: parse error\n", argv[0]);
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return 1;
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}
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*device_class = '\0';
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device_class++; /* space */
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device_class++; /* ( */
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char * device_vendor = strstr(device_class, ", ");
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if (!device_vendor) {
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fprintf(stderr, "%s: parse error\n", argv[0]);
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return 1;
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}
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*device_vendor = '\0';
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device_vendor++; /* comma */
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device_vendor++; /* space */
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char * device_code = strstr(device_vendor, ":");
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if (!device_code) {
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fprintf(stderr, "%s: parse error\n", argv[0]);
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return 1;
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}
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*device_code = '\0';
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device_code++; /* colon */
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char * device_name = strstr(device_code, ") ");
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if (!device_name) {
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fprintf(stderr, "%s: parse error\n", argv[0]);
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return 1;
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}
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*device_name = '\0';
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device_name++; /* ) */
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device_name++; /* space */
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char * linefeed = strstr(device_name, "\n");
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if (linefeed) *linefeed = '\0';
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if (numeric) {
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fprintf(stdout, "%s %s: %s:%s\n", device_bus, device_class, device_vendor, device_code);
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} else {
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for (struct device_class * c = device_classes; c->code; ++c) {
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if (!strcmp(device_class, c->code)) {
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device_class = c->name;
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break;
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}
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}
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/* TODO: We should also look up vendor + device names ourselves and possibly remove them from the kernel */
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fprintf(stdout, "%s %s: %s\n", device_bus, device_class, device_name);
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}
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}
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return 0;
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}
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@ -12,6 +12,7 @@
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#include <kernel/module.h>
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#include <kernel/mod/net.h>
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#include <kernel/multiboot.h>
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#include <kernel/pci.h>
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#define PROCFS_STANDARD_ENTRIES (sizeof(std_entries) / sizeof(struct procfs_entry))
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#define PROCFS_PROCDIR_ENTRIES (sizeof(procdir_entries) / sizeof(struct procfs_entry))
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@ -620,6 +621,67 @@ static uint32_t irq_func(fs_node_t *node, uint32_t offset, uint32_t size, uint8_
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return size;
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}
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/**
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* Basically the same as the kdebug `pci` command.
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*/
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struct _pci_buf {
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size_t offset;
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char *buffer;
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};
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static void scan_hit_list(uint32_t device, uint16_t vendorid, uint16_t deviceid, void * extra) {
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struct _pci_buf * b = extra;
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b->offset += sprintf(b->buffer + b->offset, "%2x:%2x.%d (%4x, %4x:%4x) %s %s\n",
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(int)pci_extract_bus(device),
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(int)pci_extract_slot(device),
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(int)pci_extract_func(device),
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(int)pci_find_type(device),
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vendorid,
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deviceid,
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pci_vendor_lookup(vendorid),
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pci_device_lookup(vendorid,deviceid));
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b->offset += sprintf(b->buffer + b->offset, " BAR0: 0x%8x", pci_read_field(device, PCI_BAR0, 4));
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b->offset += sprintf(b->buffer + b->offset, " BAR1: 0x%8x", pci_read_field(device, PCI_BAR1, 4));
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b->offset += sprintf(b->buffer + b->offset, " BAR2: 0x%8x", pci_read_field(device, PCI_BAR2, 4));
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b->offset += sprintf(b->buffer + b->offset, " BAR3: 0x%8x", pci_read_field(device, PCI_BAR3, 4));
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b->offset += sprintf(b->buffer + b->offset, " BAR4: 0x%8x", pci_read_field(device, PCI_BAR4, 4));
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b->offset += sprintf(b->buffer + b->offset, " BAR6: 0x%8x\n", pci_read_field(device, PCI_BAR5, 4));
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b->offset += sprintf(b->buffer + b->offset, " IRQ Line: %d", pci_read_field(device, 0x3C, 1));
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b->offset += sprintf(b->buffer + b->offset, " IRQ Pin: %d", pci_read_field(device, 0x3D, 1));
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b->offset += sprintf(b->buffer + b->offset, " Interrupt: %d", pci_get_interrupt(device));
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b->offset += sprintf(b->buffer + b->offset, " Status: 0x%4x\n", pci_read_field(device, PCI_STATUS, 2));
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}
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static void scan_count(uint32_t device, uint16_t vendorid, uint16_t deviceid, void * extra) {
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size_t * count = extra;
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(*count)++;
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}
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static uint32_t pci_func(fs_node_t *node, uint32_t offset, uint32_t size, uint8_t *buffer) {
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size_t count = 0;
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pci_scan(&scan_count, -1, &count);
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struct _pci_buf b = {0,NULL};
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b.buffer = malloc(count * 512);
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pci_scan(&scan_hit_list, -1, &b);
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size_t _bsize = b.offset;
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if (offset > _bsize) {
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free(b.buffer);
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return 0;
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}
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if (size > _bsize - offset) size = _bsize - offset;
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memcpy(buffer, b.buffer, size);
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free(b.buffer);
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return size;
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}
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static struct procfs_entry std_entries[] = {
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{-1, "cpuinfo", cpuinfo_func},
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{-2, "meminfo", meminfo_func},
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@ -634,6 +696,7 @@ static struct procfs_entry std_entries[] = {
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{-11,"loader", loader_func},
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{-12,"irq", irq_func},
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{-13,"pat", pat_func},
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{-14,"pci", pci_func},
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};
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static struct dirent * readdir_procfs_root(fs_node_t *node, uint32_t index) {
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