diff options
Diffstat (limited to 'usr.sbin/pciconf')
-rw-r--r-- | usr.sbin/pciconf/cap.c | 26 |
1 files changed, 26 insertions, 0 deletions
diff --git a/usr.sbin/pciconf/cap.c b/usr.sbin/pciconf/cap.c index 4d3fab9..ce184dd 100644 --- a/usr.sbin/pciconf/cap.c +++ b/usr.sbin/pciconf/cap.c @@ -363,6 +363,22 @@ cap_subvendor(int fd, struct pci_conf *p, uint8_t ptr) #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, uint8_t ptr) 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 |