cmd: pci: add option to parse and display BAR information

[platform/kernel/u-boot.git] / cmd / pci.c

diff --git a/cmd/pci.c b/cmd/pci.c
index 2f4978a..7993c1a 100644 (file)
--- a/cmd/pci.c
+++ b/cmd/pci.c
@@ -92,6 +92,77 @@ static void pci_show_regs(pci_dev_t dev, struct pci_reg_info *regs)
 }
 #endif
 
+#ifdef CONFIG_DM_PCI
+int pci_bar_show(struct udevice *dev)
+{
+       u8 header_type;
+       int bar_cnt, bar_id, mem_type;
+       bool is_64, is_io;
+       u32 base_low, base_high;
+       u32 size_low, size_high;
+       u64 base, size;
+       u32 reg_addr;
+       int prefetchable;
+
+       dm_pci_read_config8(dev, PCI_HEADER_TYPE, &header_type);
+
+       if (header_type == PCI_HEADER_TYPE_CARDBUS) {
+               printf("CardBus doesn't support BARs\n");
+               return -ENOSYS;
+       }
+
+       bar_cnt = (header_type == PCI_HEADER_TYPE_NORMAL) ? 6 : 2;
+
+       printf("ID   Base                Size                Width  Type\n");
+       printf("----------------------------------------------------------\n");
+
+       bar_id = 0;
+       reg_addr = PCI_BASE_ADDRESS_0;
+       while (bar_cnt) {
+               dm_pci_read_config32(dev, reg_addr, &base_low);
+               dm_pci_write_config32(dev, reg_addr, 0xffffffff);
+               dm_pci_read_config32(dev, reg_addr, &size_low);
+               dm_pci_write_config32(dev, reg_addr, base_low);
+               reg_addr += 4;
+
+               base = base_low & ~0xf;
+               size = size_low & ~0xf;
+               base_high = 0x0;
+               size_high = 0xffffffff;
+               is_64 = 0;
+               prefetchable = base_low & PCI_BASE_ADDRESS_MEM_PREFETCH;
+               is_io = base_low & PCI_BASE_ADDRESS_SPACE_IO;
+               mem_type = base_low & PCI_BASE_ADDRESS_MEM_TYPE_MASK;
+
+               if (mem_type == PCI_BASE_ADDRESS_MEM_TYPE_64) {
+                       dm_pci_read_config32(dev, reg_addr, &base_high);
+                       dm_pci_write_config32(dev, reg_addr, 0xffffffff);
+                       dm_pci_read_config32(dev, reg_addr, &size_high);
+                       dm_pci_write_config32(dev, reg_addr, base_high);
+                       bar_cnt--;
+                       reg_addr += 4;
+                       is_64 = 1;
+               }
+
+               base = base | ((u64)base_high << 32);
+               size = size | ((u64)size_high << 32);
+
+               if ((!is_64 && size_low) || (is_64 && size)) {
+                       size = ~size + 1;
+                       printf(" %d   %#016llx  %#016llx  %d     %s   %s\n",
+                              bar_id, base, size, is_64 ? 64 : 32,
+                              is_io ? "I/O" : "MEM",
+                              prefetchable ? "Prefetchable" : "");
+               }
+
+               bar_id++;
+               bar_cnt--;
+       }
+
+       return 0;
+}
+#endif
+
 static struct pci_reg_info regs_start[] = {
        { "vendor ID", PCI_SIZE_16, PCI_VENDOR_ID },
        { "device ID", PCI_SIZE_16, PCI_DEVICE_ID },
@@ -573,6 +644,9 @@ static int do_pci(cmd_tbl_t *cmdtp, int flag, int argc, char * const argv[])
                if (argc > 4)
                        value = simple_strtoul(argv[4], NULL, 16);
        case 'h':               /* header */
+#ifdef CONFIG_DM_PCI
+       case 'b':               /* bars */
+#endif
                if (argc < 3)
                        goto usage;
                if ((bdf = get_pci_dev(argv[2])) == -1)
@@ -641,6 +715,11 @@ static int do_pci(cmd_tbl_t *cmdtp, int flag, int argc, char * const argv[])
                ret = pci_cfg_write(dev, addr, size, value);
 #endif
                break;
+#ifdef CONFIG_DM_PCI
+
+       case 'b':               /* bars */
+               return pci_bar_show(dev);
+#endif
        default:
                ret = CMD_RET_USAGE;
                break;
@@ -663,6 +742,10 @@ static char pci_help_text[] =
 #endif
        "pci header b.d.f\n"
        "    - show header of PCI device 'bus.device.function'\n"
+#ifdef CONFIG_DM_PCI
+       "pci bar b.d.f\n"
+       "    - show BARs base and size for device b.d.f'\n"
+#endif
        "pci display[.b, .w, .l] b.d.f [address] [# of objects]\n"
        "    - display PCI configuration space (CFG)\n"
        "pci next[.b, .w, .l] b.d.f address\n"