pci: Add a command to show PCI regions

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

Signed-off-by: Simon Glass <sjg@chromium.org>

diff --git a/cmd/pci.c b/cmd/pci.c
index 7993c1a..41b4fff 100644 (file)
--- a/cmd/pci.c
+++ b/cmd/pci.c
@@ -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"