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Print ASPM stuff.

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ok dlg@, deraadt@, mlarkin@
This commit is contained in:
kettenis
2025-12-25 10:59:26 +00:00
parent b1d0768771
commit 97e1364f97
1 changed files with 33 additions and 1 deletions
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34
usr.sbin/pcidump/pcidump.c
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@@ -1,4 +1,4 @@
/* $OpenBSD: pcidump.c,v 1.72 2025/12/21 00:05:23 kettenis Exp $ */
/* $OpenBSD: pcidump.c,v 1.73 2025/12/25 10:59:26 kettenis Exp $ */
/*
* Copyright (c) 2006, 2007 David Gwynne <loki@animata.net>
@@ -544,12 +544,29 @@ print_pcie_ls(uint8_t speed)
printf("unknown (%d)", speed);
}
void
print_pcie_aspm(uint8_t aspm)
{
switch (aspm) {
case 1:
printf("L0s");
break;
case 2:
printf("L1");
break;
case 3:
printf("L0s, L1");
break;
}
}
void
dump_pcie_linkspeed(int bus, int dev, int func, uint8_t ptr)
{
u_int32_t dcap, dcsr;
u_int32_t lcap, lcsr;
u_int8_t cwidth, cspeed, swidth, sspeed;
u_int8_t caspm, saspm;
if (pci_read(bus, dev, func, ptr + PCI_PCIE_DCAP, &dcap) != 0)
return;
@@ -566,6 +583,7 @@ dump_pcie_linkspeed(int bus, int dev, int func, uint8_t ptr)
return;
cspeed = lcap & 0x0f;
cwidth = (lcap >> 4) & 0x3f;
caspm = (lcap >> 10) & 0x03;
if (cwidth == 0)
return;
@@ -573,6 +591,7 @@ dump_pcie_linkspeed(int bus, int dev, int func, uint8_t ptr)
return;
sspeed = (lcsr >> 16) & 0x0f;
swidth = (lcsr >> 20) & 0x3f;
saspm = lcsr & 0x03;
printf("\t\tLink Speed: ");
print_pcie_ls(sspeed);
@@ -581,6 +600,19 @@ dump_pcie_linkspeed(int bus, int dev, int func, uint8_t ptr)
printf(" GT/s\n");
printf("\t\tLink Width: x%d / x%d\n", swidth, cwidth);
if (caspm) {
printf("\t\tASPM: ");
print_pcie_aspm(caspm);
if (saspm) {
printf(" (");
print_pcie_aspm(saspm);
printf(" enabled)");
} else {
printf(" (disabled)");
}
printf("\n");
}
}
void