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Show PCIe link speed/width, earlier version ok miod@/kettenis@ then

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tweaked to show both negotiated and capable as well as fixing a mask
after comments from damien@

ok deraadt@
This commit is contained in:
jsg 2010-08-02 10:17:10 +00:00
parent e74809e1c3
commit 58cbacc395
1 changed files with 49 additions and 1 deletions
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50
usr.sbin/pcidump/pcidump.c
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@ -1,4 +1,4 @@
/* $OpenBSD: pcidump.c,v 1.22 2010/03/01 19:00:47 kettenis Exp $ */
/* $OpenBSD: pcidump.c,v 1.23 2010/08/02 10:17:10 jsg Exp $ */
/*
* Copyright (c) 2006, 2007 David Gwynne <loki@animata.net>
@ -44,6 +44,8 @@ const char *str2busdevfunc(const char *, int *, int *, int *);
int pci_nfuncs(int, int);
int pci_read(int, int, int, u_int32_t, u_int32_t *);
void dump_caplist(int, int, int, u_int8_t);
void dump_pcie_linkspeed(int, int, int, uint8_t);
void print_pcie_ls(uint8_t);
int dump_rom(int, int, int);
int dump_vga_bios(void);
@ -265,6 +267,50 @@ probe(int bus, int dev, int func)
return (0);
}
void
print_pcie_ls(uint8_t speed)
{
switch (speed) {
case 1:
printf("2.5");
break;
case 2:
printf("5.0");
break;
default:
printf("unknown (%d)", speed);
}
}
void
dump_pcie_linkspeed(int bus, int dev, int func, uint8_t ptr)
{
u_int32_t creg, sreg;
u_int8_t cap, cwidth, cspeed, swidth, sspeed;
if (pci_read(bus, dev, func, ptr + PCI_PCIE_LCAP, &creg) != 0)
return;
if (pci_read(bus, dev, func, ptr + PCI_PCIE_LCSR, &sreg) != 0)
return;
sreg = sreg >> 16;
cwidth = (creg >> 4) & 0x3f;
swidth = (sreg >> 4) & 0x3f;
cspeed = creg & 0x0f;
sspeed = sreg & 0x0f;
if (cwidth == 0)
return;
printf("\t Link Speed: ");
print_pcie_ls(sspeed);
printf(" / ");
print_pcie_ls(cspeed);
printf(" Gb/s Link Width: x%d / x%d\n", swidth, cwidth);
}
void
dump_caplist(int bus, int dev, int func, u_int8_t ptr)
{
@ -287,6 +333,8 @@ dump_caplist(int bus, int dev, int func, u_int8_t ptr)
if (cap > PCI_CAPNAMES_MAX)
cap = 0;
printf("%s\n", pci_capnames[cap]);
if (cap == PCI_CAP_PCIEXPRESS)
dump_pcie_linkspeed(bus, dev, func, ptr);
ptr = PCI_CAPLIST_NEXT(reg);
}
}