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dump the max payload size and max read request size in the pcie cap.

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This commit is contained in:
dlg 2021-01-17 11:16:22 +00:00
parent 60229baaff
commit 4adaa1147b
1 changed files with 36 additions and 3 deletions
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39
usr.sbin/pcidump/pcidump.c
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@ -1,4 +1,4 @@
/* $OpenBSD: pcidump.c,v 1.58 2021/01/06 23:43:43 dlg Exp $ */
/* $OpenBSD: pcidump.c,v 1.59 2021/01/17 11:16:22 dlg Exp $ */
/*
* Copyright (c) 2006, 2007 David Gwynne <loki@animata.net>
@ -486,6 +486,27 @@ dump_pci_powerstate(int bus, int dev, int func, uint8_t ptr)
printf("\n");
}
static unsigned int
pcie_dcap_mps(uint32_t dcap)
{
uint32_t shift = dcap & 0x7;
return (128 << shift);
}
static unsigned int
pcie_dcsr_mps(uint32_t dcsr)
{
uint32_t shift = (dcsr >> 5) & 0x7;
return (128 << shift);
}
static unsigned int
pcie_dcsr_mrrs(uint32_t dcsr)
{
uint32_t shift = (dcsr >> 12) & 0x7;
return (128 << shift);
}
void
print_pcie_ls(uint8_t speed)
{
@ -502,9 +523,21 @@ print_pcie_ls(uint8_t speed)
void
dump_pcie_linkspeed(int bus, int dev, int func, uint8_t ptr)
{
u_int32_t dcap, dcsr;
u_int32_t lcap, sreg, lcap2 = 0, xcap;
u_int8_t cwidth, cspeed, swidth, sspeed;
if (pci_read(bus, dev, func, ptr + PCI_PCIE_DCAP, &dcap) != 0)
return;
if (pci_read(bus, dev, func, ptr + PCI_PCIE_DCSR, &dcsr) != 0)
return;
printf("\t\tMax Payload Size: %u / %u bytes\n",
pcie_dcsr_mps(dcsr), pcie_dcap_mps(dcap));
printf("\t\tMax Read Request Size: %u bytes\n",
pcie_dcsr_mrrs(dcsr));
if (pci_read(bus, dev, func, ptr + PCI_PCIE_XCAP, &xcap) != 0)
return;
@ -535,9 +568,9 @@ dump_pcie_linkspeed(int bus, int dev, int func, uint8_t ptr)
print_pcie_ls(sspeed);
printf(" / ");
print_pcie_ls(cspeed);
printf(" GT/s, ");
printf(" GT/s\n");
printf("Link Width: x%d / x%d\n", swidth, cwidth);
printf("\t\tLink Width: x%d / x%d\n", swidth, cwidth);
}
void