diff options
Diffstat (limited to 'checks.c')
| -rw-r--r-- | checks.c | 231 |
1 files changed, 231 insertions, 0 deletions
@@ -681,6 +681,229 @@ static void check_ranges_format(struct check *c, struct dt_info *dti, } WARNING(ranges_format, check_ranges_format, NULL, &addr_size_cells); +static const struct bus_type pci_bus = { + .name = "PCI", +}; + +static void check_pci_bridge(struct check *c, struct dt_info *dti, struct node *node) +{ + struct property *prop; + cell_t *cells; + + prop = get_property(node, "device_type"); + if (!prop || !streq(prop->val.val, "pci")) + return; + + node->bus = &pci_bus; + + if (!strneq(node->name, "pci", node->basenamelen) && + !strneq(node->name, "pcie", node->basenamelen)) + FAIL(c, dti, "Node %s node name is not \"pci\" or \"pcie\"", + node->fullpath); + + prop = get_property(node, "ranges"); + if (!prop) + FAIL(c, dti, "Node %s missing ranges for PCI bridge (or not a bridge)", + node->fullpath); + + if (node_addr_cells(node) != 3) + FAIL(c, dti, "Node %s incorrect #address-cells for PCI bridge", + node->fullpath); + if (node_size_cells(node) != 2) + FAIL(c, dti, "Node %s incorrect #size-cells for PCI bridge", + node->fullpath); + + prop = get_property(node, "bus-range"); + if (!prop) { + FAIL(c, dti, "Node %s missing bus-range for PCI bridge", + node->fullpath); + return; + } + if (prop->val.len != (sizeof(cell_t) * 2)) { + FAIL(c, dti, "Node %s bus-range must be 2 cells", + node->fullpath); + return; + } + cells = (cell_t *)prop->val.val; + if (fdt32_to_cpu(cells[0]) > fdt32_to_cpu(cells[1])) + FAIL(c, dti, "Node %s bus-range 1st cell must be less than or equal to 2nd cell", + node->fullpath); + if (fdt32_to_cpu(cells[1]) > 0xff) + FAIL(c, dti, "Node %s bus-range maximum bus number must be less than 256", + node->fullpath); +} +WARNING(pci_bridge, check_pci_bridge, NULL, + &device_type_is_string, &addr_size_cells); + +static void check_pci_device_bus_num(struct check *c, struct dt_info *dti, struct node *node) +{ + struct property *prop; + unsigned int bus_num, min_bus, max_bus; + cell_t *cells; + + if (!node->parent || (node->parent->bus != &pci_bus)) + return; + + prop = get_property(node, "reg"); + if (!prop) + return; + + cells = (cell_t *)prop->val.val; + bus_num = (fdt32_to_cpu(cells[0]) & 0x00ff0000) >> 16; + + prop = get_property(node->parent, "bus-range"); + if (!prop) { + min_bus = max_bus = 0; + } else { + cells = (cell_t *)prop->val.val; + min_bus = fdt32_to_cpu(cells[0]); + max_bus = fdt32_to_cpu(cells[0]); + } + if ((bus_num < min_bus) || (bus_num > max_bus)) + FAIL(c, dti, "Node %s PCI bus number %d out of range, expected (%d - %d)", + node->fullpath, bus_num, min_bus, max_bus); +} +WARNING(pci_device_bus_num, check_pci_device_bus_num, NULL, ®_format, &pci_bridge); + +static void check_pci_device_reg(struct check *c, struct dt_info *dti, struct node *node) +{ + struct property *prop; + const char *unitname = get_unitname(node); + char unit_addr[5]; + unsigned int dev, func, reg; + cell_t *cells; + + if (!node->parent || (node->parent->bus != &pci_bus)) + return; + + prop = get_property(node, "reg"); + if (!prop) { + FAIL(c, dti, "Node %s missing PCI reg property", node->fullpath); + return; + } + + cells = (cell_t *)prop->val.val; + if (cells[1] || cells[2]) + FAIL(c, dti, "Node %s PCI reg config space address cells 2 and 3 must be 0", + node->fullpath); + + reg = fdt32_to_cpu(cells[0]); + dev = (reg & 0xf800) >> 11; + func = (reg & 0x700) >> 8; + + if (reg & 0xff000000) + FAIL(c, dti, "Node %s PCI reg address is not configuration space", + node->fullpath); + if (reg & 0x000000ff) + FAIL(c, dti, "Node %s PCI reg config space address register number must be 0", + node->fullpath); + + if (func == 0) { + snprintf(unit_addr, sizeof(unit_addr), "%x", dev); + if (streq(unitname, unit_addr)) + return; + } + + snprintf(unit_addr, sizeof(unit_addr), "%x,%x", dev, func); + if (streq(unitname, unit_addr)) + return; + + FAIL(c, dti, "Node %s PCI unit address format error, expected \"%s\"", + node->fullpath, unit_addr); +} +WARNING(pci_device_reg, check_pci_device_reg, NULL, ®_format, &pci_bridge); + +static const struct bus_type simple_bus = { + .name = "simple-bus", +}; + +static bool node_is_compatible(struct node *node, const char *compat) +{ + struct property *prop; + const char *str, *end; + + prop = get_property(node, "compatible"); + if (!prop) + return false; + + for (str = prop->val.val, end = str + prop->val.len; str < end; + str += strnlen(str, end - str) + 1) { + if (strneq(str, compat, end - str)) + return true; + } + return false; +} + +static void check_simple_bus_bridge(struct check *c, struct dt_info *dti, struct node *node) +{ + if (node_is_compatible(node, "simple-bus")) + node->bus = &simple_bus; +} +WARNING(simple_bus_bridge, check_simple_bus_bridge, NULL, &addr_size_cells); + +static void check_simple_bus_reg(struct check *c, struct dt_info *dti, struct node *node) +{ + struct property *prop; + const char *unitname = get_unitname(node); + char unit_addr[17]; + unsigned int size; + uint64_t reg = 0; + cell_t *cells = NULL; + + if (!node->parent || (node->parent->bus != &simple_bus)) + return; + + prop = get_property(node, "reg"); + if (prop) + cells = (cell_t *)prop->val.val; + else { + prop = get_property(node, "ranges"); + if (prop && prop->val.len) + /* skip of child address */ + cells = ((cell_t *)prop->val.val) + node_addr_cells(node); + } + + if (!cells) { + if (node->parent->parent && !(node->bus == &simple_bus)) + FAIL(c, dti, "Node %s missing or empty reg/ranges property", node->fullpath); + return; + } + + size = node_addr_cells(node->parent); + while (size--) + reg = (reg << 32) | fdt32_to_cpu(*(cells++)); + + snprintf(unit_addr, sizeof(unit_addr), "%"PRIx64, reg); + if (!streq(unitname, unit_addr)) + FAIL(c, dti, "Node %s simple-bus unit address format error, expected \"%s\"", + node->fullpath, unit_addr); +} +WARNING(simple_bus_reg, check_simple_bus_reg, NULL, ®_format, &simple_bus_bridge); + +static void check_unit_address_format(struct check *c, struct dt_info *dti, + struct node *node) +{ + const char *unitname = get_unitname(node); + + if (node->parent && node->parent->bus) + return; + + if (!unitname[0]) + return; + + if (!strncmp(unitname, "0x", 2)) { + FAIL(c, dti, "Node %s unit name should not have leading \"0x\"", + node->fullpath); + /* skip over 0x for next test */ + unitname += 2; + } + if (unitname[0] == '0' && isxdigit(unitname[1])) + FAIL(c, dti, "Node %s unit name should not have leading 0s", + node->fullpath); +} +WARNING(unit_address_format, check_unit_address_format, NULL, + &node_name_format, &pci_bridge, &simple_bus_bridge); + /* * Style checks */ @@ -752,6 +975,14 @@ static struct check *check_table[] = { &addr_size_cells, ®_format, &ranges_format, &unit_address_vs_reg, + &unit_address_format, + + &pci_bridge, + &pci_device_reg, + &pci_device_bus_num, + + &simple_bus_bridge, + &simple_bus_reg, &avoid_default_addr_size, &obsolete_chosen_interrupt_controller, |