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pci: Add a command to show PCI regions

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Add 'pci regions' which lists the I/O and memory regions accessible from
the PCI controller.

Signed-off-by: Simon Glass <sjg@chromium.org>
This commit is contained in:
Simon Glass 2017-04-08 13:10:06 -06:00 committed by Tom Rini
parent b2aa889411
commit b997a73ee6
1 changed files with 49 additions and 2 deletions
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51
cmd/pci.c
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@ -606,6 +606,47 @@ static int pci_cfg_modify(pci_dev_t bdf, ulong addr, ulong size, ulong value,
return 0;
}
#ifdef CONFIG_DM_PCI
static const struct pci_flag_info {
uint flag;
const char *name;
} pci_flag_info[] = {
{ PCI_REGION_IO, "io" },
{ PCI_REGION_PREFETCH, "prefetch" },
{ PCI_REGION_SYS_MEMORY, "sysmem" },
{ PCI_REGION_RO, "readonly" },
{ PCI_REGION_IO, "io" },
};
static void pci_show_regions(struct udevice *bus)
{
struct pci_controller *hose = dev_get_uclass_priv(bus);
const struct pci_region *reg;
int i, j;
if (!hose) {
printf("Bus '%s' is not a PCI controller\n", bus->name);
return;
}
printf("# %-16s %-16s %-16s %s\n", "Bus start", "Phys start", "Size",
"Flags");
for (i = 0, reg = hose->regions; i < hose->region_count; i++, reg++) {
printf("%d %#016llx %#016llx %#016llx ", i,
(unsigned long long)reg->bus_start,
(unsigned long long)reg->phys_start,
(unsigned long long)reg->size);
if (!(reg->flags & PCI_REGION_TYPE))
printf("mem ");
for (j = 0; j < ARRAY_SIZE(pci_flag_info); j++) {
if (reg->flags & pci_flag_info[j].flag)
printf("%s ", pci_flag_info[j].name);
}
printf("\n");
}
}
#endif
/* PCI Configuration Space access commands
*
* Syntax:
@ -657,10 +698,11 @@ static int do_pci(cmd_tbl_t *cmdtp, int flag, int argc, char * const argv[])
pci_init();
return 0;
#endif
case 'r': /* no break */
default: /* scan bus */
value = 1; /* short listing */
if (argc > 1) {
if (argv[argc-1][0] == 'l') {
if (cmd != 'r' && argv[argc-1][0] == 'l') {
value = 0;
argc--;
}
@ -673,7 +715,10 @@ static int do_pci(cmd_tbl_t *cmdtp, int flag, int argc, char * const argv[])
printf("No such bus\n");
return CMD_RET_FAILURE;
}
pciinfo(bus, value);
if (cmd == 'r')
pci_show_regions(bus);
else
pciinfo(bus, value);
#else
pciinfo(busnum, value);
#endif
@ -745,6 +790,8 @@ static char pci_help_text[] =
#ifdef CONFIG_DM_PCI
"pci bar b.d.f\n"
" - show BARs base and size for device b.d.f'\n"
"pci regions\n"
" - show PCI regions\n"
#endif
"pci display[.b, .w, .l] b.d.f [address] [# of objects]\n"
" - display PCI configuration space (CFG)\n"