Date: Thu, 25 Oct 2012 17:22:37 +0000 (UTC) From: Jim Harris <jimharris@FreeBSD.org> To: src-committers@freebsd.org, svn-src-all@freebsd.org, svn-src-head@freebsd.org Subject: svn commit: r242085 - head/usr.sbin/pciconf Message-ID: <201210251722.q9PHMbgh007546@svn.freebsd.org>
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Author: jimharris Date: Thu Oct 25 17:22:37 2012 New Revision: 242085 URL: http://svn.freebsd.org/changeset/base/242085 Log: For PCI Express capability, if max link width is greater than zero, print the current and max link speed. Sponsored by: Intel Discussed with: jhb MFC after: 1 week Modified: head/usr.sbin/pciconf/cap.c Modified: head/usr.sbin/pciconf/cap.c ============================================================================== --- head/usr.sbin/pciconf/cap.c Thu Oct 25 15:45:32 2012 (r242084) +++ head/usr.sbin/pciconf/cap.c Thu Oct 25 17:22:37 2012 (r242085) @@ -363,6 +363,22 @@ cap_subvendor(int fd, struct pci_conf *p #define MAX_PAYLOAD(field) (128 << (field)) +static const char * +link_speed_string(uint8_t speed) +{ + + switch (speed) { + case 1: + return ("2.5"); + case 2: + return ("5.0"); + case 3: + return ("8.0"); + default: + return ("undef"); + } +} + static void cap_express(int fd, struct pci_conf *p, uint8_t ptr) { @@ -418,6 +434,16 @@ cap_express(int fd, struct pci_conf *p, flags = read_config(fd, &p->pc_sel, ptr+ PCIER_LINK_STA, 2); printf(" link x%d(x%d)", (flags & PCIEM_LINK_STA_WIDTH) >> 4, (val & PCIEM_LINK_CAP_MAX_WIDTH) >> 4); + /* + * Only print link speed info if the link's max width is + * greater than 0. + */ + if ((val & PCIEM_LINK_CAP_MAX_WIDTH) != 0) { + printf("\n speed"); + printf(" %s(%s)", (flags & PCIEM_LINK_STA_WIDTH) == 0 ? + "0.0" : link_speed_string(flags & PCIEM_LINK_STA_SPEED), + link_speed_string(val & PCIEM_LINK_CAP_MAX_SPEED)); + } } static void
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