{"id":309345,"date":"2024-05-20T21:23:29","date_gmt":"2024-05-20T13:23:29","guid":{"rendered":"https:\/\/docs.pingcode.com\/ask\/ask-ask\/309345.html"},"modified":"2024-05-20T21:23:43","modified_gmt":"2024-05-20T13:23:43","slug":"c-%e4%b8%ad%e6%80%8e%e4%b9%88%e8%8e%b7%e5%8f%96pcie%e8%ae%be%e5%a4%87%e4%bf%a1%e6%81%af","status":"publish","type":"post","link":"https:\/\/docs.pingcode.com\/ask\/309345.html","title":{"rendered":"c \u4e2d\u600e\u4e48\u83b7\u53d6pcie\u8bbe\u5907\u4fe1\u606f"},"content":{"rendered":"

\"c<\/p>\n

\u5728C\u8bed\u8a00\u4e2d\u83b7\u53d6PCIe\u8bbe\u5907\u4fe1\u606f\u4e3b\u8981\u6d89\u53ca\u5230\u4f7f\u7528\u64cd\u4f5c\u7cfb\u7edf\u63d0\u4f9b\u7684\u63a5\u53e3\u3001\u5e93\u51fd\u6570\uff0c\u4ee5\u53ca\u76f4\u63a5\u8bbf\u95ee\u786c\u4ef6\u7684\u76f8\u5173\u65b9\u6cd5 \u8bbe\u5907\u6587\u4ef6\u8bbf\u95ee\u3001\u5229\u7528\u7279\u5b9a\u5e93\u51fd\u6570<\/strong>\u3002\u5728\u8fd9\u4e4b\u4e2d\uff0c\u8bbe\u5907\u6587\u4ef6\u8bbf\u95ee<\/strong>\u65b9\u6cd5\u56e0\u5176\u76f4\u63a5\u6027\u53ca\u5e7f\u6cdb\u9002\u7528\u6027\u800c\u5c24\u4e3a\u91cd\u8981\u3002<\/p>\n<\/p>\n

\u901a\u8fc7\u8bbe\u5907\u6587\u4ef6\u8bbf\u95ee\uff0c\u5f00\u53d1\u8005\u53ef\u4ee5\u76f4\u63a5\u8bfb\u5199\u64cd\u4f5c\u7cfb\u7edf\u4e2d\u4ee3\u8868PCIe\u8bbe\u5907\u7684\u6587\u4ef6\uff0c\u4ece\u800c\u83b7\u53d6\u8bbe\u5907\u7684\u8be6\u7ec6\u4fe1\u606f\u3002\u5728\u7c7bUnix\u7cfb\u7edf\u4e2d\uff0c\u8fd9\u901a\u5e38\u6d89\u53ca\u5230\u5bf9\/sys<\/code>\u6587\u4ef6\u7cfb\u7edf\u7684\u64cd\u4f5c\uff0c\u901a\u8fc7\u5b83\u53ef\u4ee5\u76f4\u63a5\u8bbf\u95eePCIe\u8bbe\u5907\u7684\u5c5e\u6027\u6587\u4ef6\uff0c\u83b7\u5f97\u8bbe\u5907\u7684\u5404\u79cd\u4fe1\u606f\uff0c\u5982\u8bbe\u5907ID\u3001\u5382\u5546ID\u7b49\u3002<\/p>\n<\/p>\n

\u4e00\u3001\u8bbe\u5907\u6587\u4ef6\u7cfb\u7edf\u8bbf\u95ee<\/strong><\/h3>\n<\/p>\n

\u8bbf\u95ee\/sys\u6587\u4ef6\u7cfb\u7edf<\/strong>\uff1a\u5728Linux\u7b49\u7c7bUnix\u7cfb\u7edf\u4e2d\uff0c\/sys<\/code>\u6587\u4ef6\u7cfb\u7edf\u63d0\u4f9b\u4e86\u4e00\u79cd\u673a\u5236\uff0c\u901a\u8fc7\u5b83\u53ef\u4ee5\u8bbf\u95ee\u7cfb\u7edf\u4e2d\u7684\u786c\u4ef6\u8bbe\u5907\u4fe1\u606f\u3002\u5bf9\u4e8ePCIe\u8bbe\u5907\u800c\u8a00\uff0c\/sys\/bus\/pci\/devices\/<\/code>\u76ee\u5f55\u4e0b\u5305\u542b\u4e86\u6240\u6709\u5df2\u7ecf\u88ab\u7cfb\u7edf\u8bc6\u522b\u7684PCIe\u8bbe\u5907\u7684\u4fe1\u606f\u3002\u901a\u8fc7\u8bfb\u53d6\u8fd9\u4e9b\u4fe1\u606f\u6587\u4ef6\uff0c\u6211\u4eec\u53ef\u4ee5\u83b7\u5f97PCIe\u8bbe\u5907\u7684\u5382\u5546ID\u3001\u8bbe\u5907ID\u3001\u8bbe\u5907\u7c7b\u522b\u7b49\u4fe1\u606f\u3002<\/p>\n<\/p>\n

\u8981\u83b7\u53d6\u7279\u5b9aPCIe\u8bbe\u5907\u4fe1\u606f\u7684\u4e00\u4e2a\u57fa\u672c\u65b9\u6cd5\u662f\u7f16\u5199\u7a0b\u5e8f\uff0c\u904d\u5386\/sys\/bus\/pci\/devices\/<\/code>\u76ee\u5f55\u4e0b\u7684\u6587\u4ef6\u548c\u5b50\u76ee\u5f55\u3002\u901a\u8fc7\u5bf9\u8fd9\u4e9b\u6587\u4ef6\u5185\u5bb9\u7684\u8bfb\u53d6\uff0c\u4e0d\u4f46\u53ef\u4ee5\u83b7\u53d6\u8bbe\u5907\u57fa\u672c\u4fe1\u606f\uff0c\u8fd8\u53ef\u4ee5\u4e86\u89e3\u5230\u8bbe\u5907\u7684\u72b6\u6001\u3001\u8d44\u6e90\u5206\u914d\u60c5\u51b5\u7b49\u8be6\u7ec6\u6570\u636e\u3002<\/p>\n<\/p>\n

\u793a\u4f8b\u4ee3\u7801<\/strong>\uff1a<\/p>\n<\/p>\n

#include <stdio.h><\/p>\n
#include <dirent.h><\/p>\n
void readPciDevicesInfo() {<\/p>\n
    DIR *dir;<\/p>\n
    struct dirent *entry;<\/p>\n
    dir = opendir("\/sys\/bus\/pci\/devices\/");<\/p>\n
    if (!dir) {<\/p>\n
        perror("opendir");<\/p>\n
        return;<\/p>\n
    }<\/p>\n
    while ((entry = readdir(dir)) != NULL) {<\/p>\n
        if (entry->d_type == DT_DIR) {<\/p>\n
            char path[PATH_MAX];<\/p>\n
            snprintf(path, sizeof(path), "\/sys\/bus\/pci\/devices\/%s\/vendor", entry->d_name);<\/p>\n
            FILE *file = fopen(path, "r");<\/p>\n
            if (file) {<\/p>\n
                char buffer[8];<\/p>\n
                fscanf(file, "%s", buffer);<\/p>\n
                printf("Device %s Vendor ID: %s\\n", entry->d_name, buffer);<\/p>\n
                fclose(file);<\/p>\n
            }<\/p>\n
        }<\/p>\n
    }<\/p>\n
    closedir(dir);<\/p>\n
}<\/p>\n
<\/code><\/pre>\n<\/p>\n
\u5728\u4e0a\u9762\u7684\u4ee3\u7801\u4e2d\uff0c\u6211\u4eec\u9996\u5148\u6253\u5f00\u4e86\/sys\/bus\/pci\/devices\/<\/code>\u76ee\u5f55\uff0c\u7136\u540e\u904d\u5386\u8be5\u76ee\u5f55\u4e0b\u7684\u6240\u6709\u6761\u76ee\u3002\u9488\u5bf9\u6bcf\u4e2a\u627e\u5230\u7684\u8bbe\u5907\u76ee\u5f55\uff0c\u6211\u4eec\u6784\u9020\u4e86\u8bfb\u53d6\u5382\u5546ID\u7684\u6587\u4ef6\u8def\u5f84\uff0c\u7136\u540e\u6253\u5f00\u5e76\u8bfb\u53d6\u8be5\u6587\u4ef6\uff0c\u6700\u540e\u6253\u5370\u51fa\u8bbe\u5907ID\u548c\u5382\u5546ID\u3002<\/p>\n<\/p>\n
\u4e8c\u3001\u4f7f\u7528\u7279\u5b9a\u5e93\u51fd\u6570<\/strong><\/h3>\n<\/p>\n
\u5229\u7528libpci\u5e93<\/strong>\uff1alibpci<\/code>\u662f\u4e00\u4e2a\u65b9\u4fbf\u8bbf\u95eePCI\u8bbe\u5907\u4fe1\u606f\u7684\u5e93\uff0c\u5b83\u63d0\u4f9b\u4e86\u4e00\u5957\u51fd\u6570\u7528\u4e8e\u67e5\u8be2PCI\u8bbe\u5907\u7684\u4fe1\u606f\u3002\u4f7f\u7528libpci<\/code>\uff0c\u5f00\u53d1\u8005\u53ef\u4ee5\u66f4\u52a0\u65b9\u4fbf\u5730\u83b7\u53d6PCIe\u8bbe\u5907\u7684\u8be6\u7ec6\u4fe1\u606f\uff0c\u5982\u8bbe\u5907\u540d\u79f0\u3001\u5382\u5546\u540d\u79f0\u7b49\u3002<\/p>\n<\/p>\n
\u5b89\u88c5libpci<\/code>\u5e93\u5e76\u5728\u7a0b\u5e8f\u4e2d\u5f15\u7528\u5b83\u4e4b\u540e\uff0c\u53ef\u4ee5\u4f7f\u7528\u5e93\u4e2d\u63d0\u4f9b\u7684\u51fd\u6570\u6765\u67e5\u8be2PCI\u8bbe\u5907\u3002\u4f8b\u5982\uff0cpci_lookup_name()<\/code>\u51fd\u6570\u53ef\u4ee5\u7528\u6765\u67e5\u8be2\u8bbe\u5907\u540d\u79f0\u6216\u5382\u5546\u540d\u79f0\u3002<\/p>\n<\/p>\n
\u793a\u4f8b\u4f7f\u7528libpci<\/strong>\uff1a<\/p>\n<\/p>\n
#include <stdio.h><\/p>\n
#include <pci\/pci.h><\/p>\n
void readPciDevicesInfoUsingLibpci() {<\/p>\n
    struct pci_access *pacc;<\/p>\n
    struct pci_dev *dev;<\/p>\n
    char namebuf[1024], *name;<\/p>\n
    pacc = pci_alloc();<\/p>\n
    pci_init(pacc);<\/p>\n
    pci_scan_bus(pacc);<\/p>\n
    for (dev = pacc->devices; dev; dev = dev->next) {<\/p>\n
        pci_fill_info(dev, PCI_FILL_IDENT | PCI_FILL_BASES | PCI_FILL_CLASS);<\/p>\n
        name = pci_lookup_name(pacc, namebuf, sizeof(namebuf), PCI_LOOKUP_VENDOR | PCI_LOOKUP_DEVICE, <\/p>\n
               dev->vendor_id, dev->device_id);<\/p>\n
        printf("%s: %s\\n", dev->slot_name, name);<\/p>\n
    }<\/p>\n
    pci_cleanup(pacc);<\/p>\n
}<\/p>\n
<\/code><\/pre>\n<\/p>\n
\u5728\u8fd9\u4e2a\u793a\u4f8b\u4e2d\uff0c\u901a\u8fc7\u5bf9libpci<\/code>\u7684\u76f8\u5173\u51fd\u6570\u8c03\u7528\uff0c\u6211\u4eec\u521d\u59cb\u5316\u4e86PCI\u8bbf\u95ee\u63a5\u53e3\uff0c\u626b\u63cf\u4e86PCI\u603b\u7ebf\uff0c\u5e76\u904d\u5386\u4e86\u6240\u6709\u627e\u5230\u7684PCIe\u8bbe\u5907\u3002\u5bf9\u4e8e\u6bcf\u4e2a\u8bbe\u5907\uff0c\u6211\u4eec\u5229\u7528pci_lookup_name()<\/code>\u51fd\u6570\u67e5\u8be2\u5e76\u8f93\u51fa\u4e86\u8bbe\u5907\u7684\u5382\u5546\u540d\u548c\u8bbe\u5907\u540d\u3002<\/p>\n<\/p>\n
\u8fd9\u4e24\u79cd\u65b9\u6cd5\u5404\u6709\u4f18\u7f3a\u70b9\u3002\u76f4\u63a5\u8bbf\u95ee\u8bbe\u5907\u6587\u4ef6\u7cfb\u7edf<\/strong>\u5bf9\u5f00\u53d1\u8005\u7684\u7cfb\u7edf\u77e5\u8bc6\u8981\u6c42\u8f83\u9ad8\uff0c\u4f46\u5b83\u4e0d\u4f9d\u8d56\u4e8e\u7b2c\u4e09\u65b9\u5e93\uff0c\u9002\u7528\u4e8e\u5bf9\u7cfb\u7edf\u8c03\u7528\u6743\u9650\u6709\u4e25\u683c\u8981\u6c42\u7684\u573a\u666f\u3002\u5229\u7528\u7279\u5b9a\u5e93\u51fd\u6570<\/strong>\u5982libpci<\/code>\u7b80\u5316\u4e86\u5f00\u53d1\u8fc7\u7a0b\uff0c\u4f7f\u5f97\u7a0b\u5e8f\u5177\u6709\u66f4\u597d\u7684\u53ef\u79fb\u690d\u6027\u548c\u6613\u7528\u6027\u3002\u9488\u5bf9\u4e0d\u540c\u7684\u5e94\u7528\u573a\u666f\u548c\u5f00\u53d1\u9700\u6c42\uff0c\u5f00\u53d1\u8005\u5e94\u9009\u62e9\u6700\u5408\u9002\u7684\u83b7\u53d6PCIe\u8bbe\u5907\u4fe1\u606f\u7684\u65b9\u6cd5\u3002<\/p>\n<\/p>\n
\u76f8\u5173\u95ee\u7b54FAQs\uff1a<\/strong><\/h2>\n
1. \u5982\u4f55\u5728C\u8bed\u8a00\u4e2d\u67e5\u8be2PCIe\u8bbe\u5907\u7684\u4fe1\u606f\uff1f<\/strong>
\n\u5728C\u8bed\u8a00\u4e2d\uff0c\u53ef\u4ee5\u4f7f\u7528libpci\u5e93\u6765\u67e5\u8be2PCIe\u8bbe\u5907\u7684\u4fe1\u606f\u3002\u9996\u5148\uff0c\u9700\u8981\u901a\u8fc7\u6253\u5f00\/sys\/bus\/pci\/devices<\/code>\u76ee\u5f55\u6765\u83b7\u53d6PCIe\u8bbe\u5907\u7684\u4fe1\u606f\u3002\u7136\u540e\uff0c\u4f7f\u7528\u76f8\u5173\u7684API\u51fd\u6570\u6765\u8bfb\u53d6\u8bbe\u5907\u7684\u914d\u7f6e\u5bc4\u5b58\u5668\u548c\u5176\u4ed6\u4fe1\u606f\uff0c\u4f8b\u5982\u8bbe\u5907\u7684\u5382\u5546ID\u3001\u8bbe\u5907ID\u3001\u5b50\u7cfb\u7edf\u5382\u5546ID\u3001\u5b50\u7cfb\u7edf\u8bbe\u5907ID\u7b49\u3002\u901a\u8fc7\u8fd9\u4e9b\u4fe1\u606f\uff0c\u53ef\u4ee5\u83b7\u5f97PCIe\u8bbe\u5907\u7684\u8be6\u7ec6\u63cf\u8ff0\u548c\u7279\u6027\u3002<\/p>\n
2. \u5982\u4f55\u4f7f\u7528C\u8bed\u8a00\u4ee3\u7801\u83b7\u53d6PCIe\u8bbe\u5907\u7684\u901f\u5ea6\u4fe1\u606f\uff1f<\/strong>
\n\u8981\u83b7\u53d6PCIe\u8bbe\u5907\u7684\u901f\u5ea6\u4fe1\u606f\uff0c\u53ef\u4ee5\u901a\u8fc7\u8bfb\u53d6\u8bbe\u5907\u7684PCI Express\u8bbe\u5907\u80fd\u529b\u5bc4\u5b58\u5668\u6765\u5b9e\u73b0\u3002\u9996\u5148\uff0c\u9700\u8981\u4f7f\u7528\u76f8\u5173\u7684API\u51fd\u6570\u6253\u5f00\u8bbe\u5907\uff0c\u7136\u540e\u8bfb\u53d6\u8bbe\u5907\u7684\u76f8\u5173\u5bc4\u5b58\u5668\u5185\u5bb9\u3002\u5728PCI Express\u8bbe\u5907\u80fd\u529b\u5bc4\u5b58\u5668\u4e2d\uff0c\u53ef\u4ee5\u627e\u5230\u8bbe\u5907\u7684\u901f\u5ea6\u4fe1\u606f\uff0c\u4f8b\u5982\u8bbe\u5907\u7684\u94fe\u63a5\u901f\u5ea6\u3001\u94fe\u63a5\u5bbd\u5ea6\u7b49\u3002\u901a\u8fc7\u89e3\u6790\u8fd9\u4e9b\u6570\u636e\uff0c\u53ef\u4ee5\u83b7\u53d6PCIe\u8bbe\u5907\u7684\u901f\u5ea6\u4fe1\u606f\u3002<\/p>\n
3. \u6709\u6ca1\u6709C\u8bed\u8a00\u7684\u4ee3\u7801\u53ef\u4ee5\u83b7\u53d6PCIe\u8bbe\u5907\u7684IRQ\u4fe1\u606f\uff1f<\/strong>
\n\u53ef\u4ee5\u4f7f\u7528C\u8bed\u8a00\u7f16\u5199\u4ee3\u7801\u6765\u83b7\u53d6PCIe\u8bbe\u5907\u7684IRQ\uff08\u4e2d\u65ad\u8bf7\u6c42\u7ebf\uff09\u4fe1\u606f\u3002\u9996\u5148\uff0c\u9700\u8981\u6253\u5f00\u8bbe\u5907\u5e76\u8bfb\u53d6\u8bbe\u5907\u7684\u4e2d\u65ad\u7ebf\u5bc4\u5b58\u5668\u5185\u5bb9\u3002\u8fd9\u4e9b\u5bc4\u5b58\u5668\u4f1a\u8bb0\u5f55\u8bbe\u5907\u6240\u4f7f\u7528\u7684\u4e2d\u65ad\u7ebf\u7f16\u53f7\u3002\u7136\u540e\uff0c\u53ef\u4ee5\u4f7f\u7528\u76f8\u5173\u7684\u51fd\u6570\u6765\u67e5\u8be2\u7cfb\u7edf\u7684\u4e2d\u65ad\u63a7\u5236\u5668\uff0c\u4ee5\u83b7\u53d6\u4e0e\u8bbe\u5907\u76f8\u5173\u7684IRQ\u4fe1\u606f\u3002\u901a\u8fc7\u8fd9\u4e9b\u6b65\u9aa4\uff0c\u53ef\u4ee5\u83b7\u53d6PCIe\u8bbe\u5907\u7684IRQ\u4fe1\u606f\uff0c\u7528\u4e8e\u5904\u7406\u8bbe\u5907\u7684\u4e2d\u65ad\u3002<\/p>\n","protected":false},"excerpt":{"rendered":"\u5728C\u8bed\u8a00\u4e2d\u83b7\u53d6PCIe\u8bbe\u5907\u4fe1\u606f\u4e3b\u8981\u6d89\u53ca\u5230\u4f7f\u7528\u64cd\u4f5c\u7cfb\u7edf\u63d0\u4f9b\u7684\u63a5\u53e3\u3001\u5e93\u51fd\u6570\uff0c\u4ee5\u53ca\u76f4\u63a5\u8bbf\u95ee\u786c\u4ef6\u7684\u76f8\u5173\u65b9\u6cd5 \u8bbe\u5907\u6587\u4ef6\u8bbf […]","protected":false},"author":3,"featured_media":309362,"comment_status":"closed","ping_status":"","sticky":false,"template":"","format":"standard","meta":{"_acf_changed":false,"footnotes":""},"categories":[37],"tags":[],"acf":[],"_links":{"self":[{"href":"https:\/\/docs.pingcode.com\/wp-json\/wp\/v2\/posts\/309345"}],"collection":[{"href":"https:\/\/docs.pingcode.com\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/docs.pingcode.com\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/docs.pingcode.com\/wp-json\/wp\/v2\/users\/3"}],"replies":[{"embeddable":true,"href":"https:\/\/docs.pingcode.com\/wp-json\/wp\/v2\/comments?post=309345"}],"version-history":[{"count":0,"href":"https:\/\/docs.pingcode.com\/wp-json\/wp\/v2\/posts\/309345\/revisions"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/docs.pingcode.com\/wp-json\/wp\/v2\/media\/309362"}],"wp:attachment":[{"href":"https:\/\/docs.pingcode.com\/wp-json\/wp\/v2\/media?parent=309345"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/docs.pingcode.com\/wp-json\/wp\/v2\/categories?post=309345"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/docs.pingcode.com\/wp-json\/wp\/v2\/tags?post=309345"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}