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linux/scripts/dtc/checks.c

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/*
* (C) Copyright David Gibson <dwg@au1.ibm.com>, IBM Corporation. 2007.
*
*
* This program is free software; you can redistribute it and/or
* modify it under the terms of the GNU General Public License as
* published by the Free Software Foundation; either version 2 of the
* License, or (at your option) any later version.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
* General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program; if not, write to the Free Software
* Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307
* USA
*/
#include "dtc.h"
#ifdef TRACE_CHECKS
#define TRACE(c, ...) \
do { \
fprintf(stderr, "=== %s: ", (c)->name); \
fprintf(stderr, __VA_ARGS__); \
fprintf(stderr, "\n"); \
} while (0)
#else
#define TRACE(c, fmt, ...) do { } while (0)
#endif
enum checkstatus {
UNCHECKED = 0,
PREREQ,
PASSED,
FAILED,
};
struct check;
typedef void (*check_fn)(struct check *c, struct dt_info *dti, struct node *node);
struct check {
const char *name;
check_fn fn;
void *data;
bool warn, error;
enum checkstatus status;
bool inprogress;
int num_prereqs;
struct check **prereq;
};
#define CHECK_ENTRY(_nm, _fn, _d, _w, _e, ...) \
static struct check *_nm##_prereqs[] = { __VA_ARGS__ }; \
static struct check _nm = { \
.name = #_nm, \
.fn = (_fn), \
.data = (_d), \
.warn = (_w), \
.error = (_e), \
.status = UNCHECKED, \
.num_prereqs = ARRAY_SIZE(_nm##_prereqs), \
.prereq = _nm##_prereqs, \
};
#define WARNING(_nm, _fn, _d, ...) \
CHECK_ENTRY(_nm, _fn, _d, true, false, __VA_ARGS__)
#define ERROR(_nm, _fn, _d, ...) \
CHECK_ENTRY(_nm, _fn, _d, false, true, __VA_ARGS__)
#define CHECK(_nm, _fn, _d, ...) \
CHECK_ENTRY(_nm, _fn, _d, false, false, __VA_ARGS__)
static inline void PRINTF(3, 4) check_msg(struct check *c, struct dt_info *dti,
const char *fmt, ...)
{
va_list ap;
va_start(ap, fmt);
if ((c->warn && (quiet < 1))
|| (c->error && (quiet < 2))) {
fprintf(stderr, "%s: %s (%s): ",
strcmp(dti->outname, "-") ? dti->outname : "<stdout>",
(c->error) ? "ERROR" : "Warning", c->name);
vfprintf(stderr, fmt, ap);
fprintf(stderr, "\n");
}
va_end(ap);
}
#define FAIL(c, dti, ...) \
do { \
TRACE((c), "\t\tFAILED at %s:%d", __FILE__, __LINE__); \
(c)->status = FAILED; \
check_msg((c), dti, __VA_ARGS__); \
} while (0)
static void check_nodes_props(struct check *c, struct dt_info *dti, struct node *node)
{
struct node *child;
TRACE(c, "%s", node->fullpath);
if (c->fn)
c->fn(c, dti, node);
for_each_child(node, child)
check_nodes_props(c, dti, child);
}
static bool run_check(struct check *c, struct dt_info *dti)
{
struct node *dt = dti->dt;
bool error = false;
int i;
assert(!c->inprogress);
if (c->status != UNCHECKED)
goto out;
c->inprogress = true;
for (i = 0; i < c->num_prereqs; i++) {
struct check *prq = c->prereq[i];
error = error || run_check(prq, dti);
if (prq->status != PASSED) {
c->status = PREREQ;
check_msg(c, dti, "Failed prerequisite '%s'",
c->prereq[i]->name);
}
}
if (c->status != UNCHECKED)
goto out;
check_nodes_props(c, dti, dt);
if (c->status == UNCHECKED)
c->status = PASSED;
TRACE(c, "\tCompleted, status %d", c->status);
out:
c->inprogress = false;
if ((c->status != PASSED) && (c->error))
error = true;
return error;
}
/*
* Utility check functions
*/
/* A check which always fails, for testing purposes only */
static inline void check_always_fail(struct check *c, struct dt_info *dti,
struct node *node)
{
FAIL(c, dti, "always_fail check");
}
CHECK(always_fail, check_always_fail, NULL);
static void check_is_string(struct check *c, struct dt_info *dti,
struct node *node)
{
struct property *prop;
char *propname = c->data;
prop = get_property(node, propname);
if (!prop)
return; /* Not present, assumed ok */
if (!data_is_one_string(prop->val))
FAIL(c, dti, "\"%s\" property in %s is not a string",
propname, node->fullpath);
}
#define WARNING_IF_NOT_STRING(nm, propname) \
WARNING(nm, check_is_string, (propname))
#define ERROR_IF_NOT_STRING(nm, propname) \
ERROR(nm, check_is_string, (propname))
static void check_is_cell(struct check *c, struct dt_info *dti,
struct node *node)
{
struct property *prop;
char *propname = c->data;
prop = get_property(node, propname);
if (!prop)
return; /* Not present, assumed ok */
if (prop->val.len != sizeof(cell_t))
FAIL(c, dti, "\"%s\" property in %s is not a single cell",
propname, node->fullpath);
}
#define WARNING_IF_NOT_CELL(nm, propname) \
WARNING(nm, check_is_cell, (propname))
#define ERROR_IF_NOT_CELL(nm, propname) \
ERROR(nm, check_is_cell, (propname))
/*
* Structural check functions
*/
static void check_duplicate_node_names(struct check *c, struct dt_info *dti,
struct node *node)
{
struct node *child, *child2;
for_each_child(node, child)
for (child2 = child->next_sibling;
child2;
child2 = child2->next_sibling)
if (streq(child->name, child2->name))
FAIL(c, dti, "Duplicate node name %s",
child->fullpath);
}
ERROR(duplicate_node_names, check_duplicate_node_names, NULL);
static void check_duplicate_property_names(struct check *c, struct dt_info *dti,
struct node *node)
{
struct property *prop, *prop2;
for_each_property(node, prop) {
for (prop2 = prop->next; prop2; prop2 = prop2->next) {
if (prop2->deleted)
continue;
if (streq(prop->name, prop2->name))
FAIL(c, dti, "Duplicate property name %s in %s",
prop->name, node->fullpath);
}
}
}
ERROR(duplicate_property_names, check_duplicate_property_names, NULL);
#define LOWERCASE "abcdefghijklmnopqrstuvwxyz"
#define UPPERCASE "ABCDEFGHIJKLMNOPQRSTUVWXYZ"
#define DIGITS "0123456789"
#define PROPNODECHARS LOWERCASE UPPERCASE DIGITS ",._+*#?-"
#define PROPNODECHARSSTRICT LOWERCASE UPPERCASE DIGITS ",-"
static void check_node_name_chars(struct check *c, struct dt_info *dti,
struct node *node)
{
int n = strspn(node->name, c->data);
if (n < strlen(node->name))
FAIL(c, dti, "Bad character '%c' in node %s",
node->name[n], node->fullpath);
}
ERROR(node_name_chars, check_node_name_chars, PROPNODECHARS "@");
static void check_node_name_chars_strict(struct check *c, struct dt_info *dti,
struct node *node)
{
int n = strspn(node->name, c->data);
if (n < node->basenamelen)
FAIL(c, dti, "Character '%c' not recommended in node %s",
node->name[n], node->fullpath);
}
CHECK(node_name_chars_strict, check_node_name_chars_strict, PROPNODECHARSSTRICT);
static void check_node_name_format(struct check *c, struct dt_info *dti,
struct node *node)
{
if (strchr(get_unitname(node), '@'))
FAIL(c, dti, "Node %s has multiple '@' characters in name",
node->fullpath);
}
ERROR(node_name_format, check_node_name_format, NULL, &node_name_chars);
static void check_unit_address_vs_reg(struct check *c, struct dt_info *dti,
struct node *node)
{
const char *unitname = get_unitname(node);
struct property *prop = get_property(node, "reg");
if (!prop) {
prop = get_property(node, "ranges");
if (prop && !prop->val.len)
prop = NULL;
}
if (prop) {
if (!unitname[0])
FAIL(c, dti, "Node %s has a reg or ranges property, but no unit name",
node->fullpath);
} else {
if (unitname[0])
FAIL(c, dti, "Node %s has a unit name, but no reg property",
node->fullpath);
}
}
WARNING(unit_address_vs_reg, check_unit_address_vs_reg, NULL);
static void check_property_name_chars(struct check *c, struct dt_info *dti,
struct node *node)
{
struct property *prop;
for_each_property(node, prop) {
int n = strspn(prop->name, c->data);
if (n < strlen(prop->name))
FAIL(c, dti, "Bad character '%c' in property name \"%s\", node %s",
prop->name[n], prop->name, node->fullpath);
}
}
ERROR(property_name_chars, check_property_name_chars, PROPNODECHARS);
static void check_property_name_chars_strict(struct check *c,
struct dt_info *dti,
struct node *node)
{
struct property *prop;
for_each_property(node, prop) {
const char *name = prop->name;
int n = strspn(name, c->data);
if (n == strlen(prop->name))
continue;
/* Certain names are whitelisted */
if (streq(name, "device_type"))
continue;
/*
* # is only allowed at the beginning of property names not counting
* the vendor prefix.
*/
if (name[n] == '#' && ((n == 0) || (name[n-1] == ','))) {
name += n + 1;
n = strspn(name, c->data);
}
if (n < strlen(name))
FAIL(c, dti, "Character '%c' not recommended in property name \"%s\", node %s",
name[n], prop->name, node->fullpath);
}
}
CHECK(property_name_chars_strict, check_property_name_chars_strict, PROPNODECHARSSTRICT);
#define DESCLABEL_FMT "%s%s%s%s%s"
#define DESCLABEL_ARGS(node,prop,mark) \
((mark) ? "value of " : ""), \
((prop) ? "'" : ""), \
((prop) ? (prop)->name : ""), \
((prop) ? "' in " : ""), (node)->fullpath
static void check_duplicate_label(struct check *c, struct dt_info *dti,
const char *label, struct node *node,
struct property *prop, struct marker *mark)
{
struct node *dt = dti->dt;
struct node *othernode = NULL;
struct property *otherprop = NULL;
struct marker *othermark = NULL;
othernode = get_node_by_label(dt, label);
if (!othernode)
otherprop = get_property_by_label(dt, label, &othernode);
if (!othernode)
othermark = get_marker_label(dt, label, &othernode,
&otherprop);
if (!othernode)
return;
if ((othernode != node) || (otherprop != prop) || (othermark != mark))
FAIL(c, dti, "Duplicate label '%s' on " DESCLABEL_FMT
" and " DESCLABEL_FMT,
label, DESCLABEL_ARGS(node, prop, mark),
DESCLABEL_ARGS(othernode, otherprop, othermark));
}
static void check_duplicate_label_node(struct check *c, struct dt_info *dti,
struct node *node)
{
struct label *l;
struct property *prop;
for_each_label(node->labels, l)
check_duplicate_label(c, dti, l->label, node, NULL, NULL);
for_each_property(node, prop) {
struct marker *m = prop->val.markers;
for_each_label(prop->labels, l)
check_duplicate_label(c, dti, l->label, node, prop, NULL);
for_each_marker_of_type(m, LABEL)
check_duplicate_label(c, dti, m->ref, node, prop, m);
}
}
ERROR(duplicate_label, check_duplicate_label_node, NULL);
static cell_t check_phandle_prop(struct check *c, struct dt_info *dti,
struct node *node, const char *propname)
{
struct node *root = dti->dt;
struct property *prop;
struct marker *m;
cell_t phandle;
prop = get_property(node, propname);
if (!prop)
return 0;
if (prop->val.len != sizeof(cell_t)) {
FAIL(c, dti, "%s has bad length (%d) %s property",
node->fullpath, prop->val.len, prop->name);
return 0;
}
m = prop->val.markers;
for_each_marker_of_type(m, REF_PHANDLE) {
assert(m->offset == 0);
if (node != get_node_by_ref(root, m->ref))
/* "Set this node's phandle equal to some
* other node's phandle". That's nonsensical
* by construction. */ {
FAIL(c, dti, "%s in %s is a reference to another node",
prop->name, node->fullpath);
}
/* But setting this node's phandle equal to its own
* phandle is allowed - that means allocate a unique
* phandle for this node, even if it's not otherwise
* referenced. The value will be filled in later, so
* we treat it as having no phandle data for now. */
return 0;
}
phandle = propval_cell(prop);
if ((phandle == 0) || (phandle == -1)) {
FAIL(c, dti, "%s has bad value (0x%x) in %s property",
node->fullpath, phandle, prop->name);
return 0;
}
return phandle;
}
static void check_explicit_phandles(struct check *c, struct dt_info *dti,
struct node *node)
{
struct node *root = dti->dt;
struct node *other;
cell_t phandle, linux_phandle;
/* Nothing should have assigned phandles yet */
assert(!node->phandle);
phandle = check_phandle_prop(c, dti, node, "phandle");
linux_phandle = check_phandle_prop(c, dti, node, "linux,phandle");
if (!phandle && !linux_phandle)
/* No valid phandles; nothing further to check */
return;
if (linux_phandle && phandle && (phandle != linux_phandle))
FAIL(c, dti, "%s has mismatching 'phandle' and 'linux,phandle'"
" properties", node->fullpath);
if (linux_phandle && !phandle)
phandle = linux_phandle;
other = get_node_by_phandle(root, phandle);
if (other && (other != node)) {
FAIL(c, dti, "%s has duplicated phandle 0x%x (seen before at %s)",
node->fullpath, phandle, other->fullpath);
return;
}
node->phandle = phandle;
}
ERROR(explicit_phandles, check_explicit_phandles, NULL);
static void check_name_properties(struct check *c, struct dt_info *dti,
struct node *node)
{
struct property **pp, *prop = NULL;
for (pp = &node->proplist; *pp; pp = &((*pp)->next))
if (streq((*pp)->name, "name")) {
prop = *pp;
break;
}
if (!prop)
return; /* No name property, that's fine */
if ((prop->val.len != node->basenamelen+1)
|| (memcmp(prop->val.val, node->name, node->basenamelen) != 0)) {
FAIL(c, dti, "\"name\" property in %s is incorrect (\"%s\" instead"
" of base node name)", node->fullpath, prop->val.val);
} else {
/* The name property is correct, and therefore redundant.
* Delete it */
*pp = prop->next;
free(prop->name);
data_free(prop->val);
free(prop);
}
}
ERROR_IF_NOT_STRING(name_is_string, "name");
ERROR(name_properties, check_name_properties, NULL, &name_is_string);
/*
* Reference fixup functions
*/
static void fixup_phandle_references(struct check *c, struct dt_info *dti,
struct node *node)
{
struct node *dt = dti->dt;
struct property *prop;
for_each_property(node, prop) {
struct marker *m = prop->val.markers;
struct node *refnode;
cell_t phandle;
for_each_marker_of_type(m, REF_PHANDLE) {
assert(m->offset + sizeof(cell_t) <= prop->val.len);
refnode = get_node_by_ref(dt, m->ref);
if (! refnode) {
if (!(dti->dtsflags & DTSF_PLUGIN))
FAIL(c, dti, "Reference to non-existent node or "
"label \"%s\"\n", m->ref);
else /* mark the entry as unresolved */
*((fdt32_t *)(prop->val.val + m->offset)) =
cpu_to_fdt32(0xffffffff);
continue;
}
phandle = get_node_phandle(dt, refnode);
*((fdt32_t *)(prop->val.val + m->offset)) = cpu_to_fdt32(phandle);
}
}
}
ERROR(phandle_references, fixup_phandle_references, NULL,
&duplicate_node_names, &explicit_phandles);
static void fixup_path_references(struct check *c, struct dt_info *dti,
struct node *node)
{
struct node *dt = dti->dt;
struct property *prop;
for_each_property(node, prop) {
struct marker *m = prop->val.markers;
struct node *refnode;
char *path;
for_each_marker_of_type(m, REF_PATH) {
assert(m->offset <= prop->val.len);
refnode = get_node_by_ref(dt, m->ref);
if (!refnode) {
FAIL(c, dti, "Reference to non-existent node or label \"%s\"\n",
m->ref);
continue;
}
path = refnode->fullpath;
prop->val = data_insert_at_marker(prop->val, m, path,
strlen(path) + 1);
}
}
}
ERROR(path_references, fixup_path_references, NULL, &duplicate_node_names);
/*
* Semantic checks
*/
WARNING_IF_NOT_CELL(address_cells_is_cell, "#address-cells");
WARNING_IF_NOT_CELL(size_cells_is_cell, "#size-cells");
WARNING_IF_NOT_CELL(interrupt_cells_is_cell, "#interrupt-cells");
WARNING_IF_NOT_STRING(device_type_is_string, "device_type");
WARNING_IF_NOT_STRING(model_is_string, "model");
WARNING_IF_NOT_STRING(status_is_string, "status");
static void fixup_addr_size_cells(struct check *c, struct dt_info *dti,
struct node *node)
{
struct property *prop;
node->addr_cells = -1;
node->size_cells = -1;
prop = get_property(node, "#address-cells");
if (prop)
node->addr_cells = propval_cell(prop);
prop = get_property(node, "#size-cells");
if (prop)
node->size_cells = propval_cell(prop);
}
WARNING(addr_size_cells, fixup_addr_size_cells, NULL,
&address_cells_is_cell, &size_cells_is_cell);
#define node_addr_cells(n) \
(((n)->addr_cells == -1) ? 2 : (n)->addr_cells)
#define node_size_cells(n) \
(((n)->size_cells == -1) ? 1 : (n)->size_cells)
static void check_reg_format(struct check *c, struct dt_info *dti,
struct node *node)
{
struct property *prop;
int addr_cells, size_cells, entrylen;
prop = get_property(node, "reg");
if (!prop)
return; /* No "reg", that's fine */
if (!node->parent) {
FAIL(c, dti, "Root node has a \"reg\" property");
return;
}
if (prop->val.len == 0)
FAIL(c, dti, "\"reg\" property in %s is empty", node->fullpath);
addr_cells = node_addr_cells(node->parent);
size_cells = node_size_cells(node->parent);
entrylen = (addr_cells + size_cells) * sizeof(cell_t);
if (!entrylen || (prop->val.len % entrylen) != 0)
FAIL(c, dti, "\"reg\" property in %s has invalid length (%d bytes) "
"(#address-cells == %d, #size-cells == %d)",
node->fullpath, prop->val.len, addr_cells, size_cells);
}
WARNING(reg_format, check_reg_format, NULL, &addr_size_cells);
static void check_ranges_format(struct check *c, struct dt_info *dti,
struct node *node)
{
struct property *prop;
int c_addr_cells, p_addr_cells, c_size_cells, p_size_cells, entrylen;
prop = get_property(node, "ranges");
if (!prop)
return;
if (!node->parent) {
FAIL(c, dti, "Root node has a \"ranges\" property");
return;
}
p_addr_cells = node_addr_cells(node->parent);
p_size_cells = node_size_cells(node->parent);
c_addr_cells = node_addr_cells(node);
c_size_cells = node_size_cells(node);
entrylen = (p_addr_cells + c_addr_cells + c_size_cells) * sizeof(cell_t);
if (prop->val.len == 0) {
if (p_addr_cells != c_addr_cells)
FAIL(c, dti, "%s has empty \"ranges\" property but its "
"#address-cells (%d) differs from %s (%d)",
node->fullpath, c_addr_cells, node->parent->fullpath,
p_addr_cells);
if (p_size_cells != c_size_cells)
FAIL(c, dti, "%s has empty \"ranges\" property but its "
"#size-cells (%d) differs from %s (%d)",
node->fullpath, c_size_cells, node->parent->fullpath,
p_size_cells);
} else if ((prop->val.len % entrylen) != 0) {
FAIL(c, dti, "\"ranges\" property in %s has invalid length (%d bytes) "
"(parent #address-cells == %d, child #address-cells == %d, "
"#size-cells == %d)", node->fullpath, prop->val.len,
p_addr_cells, c_addr_cells, c_size_cells);
}
}
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, &reg_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, &reg_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, &reg_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
*/
static void check_avoid_default_addr_size(struct check *c, struct dt_info *dti,
struct node *node)
{
struct property *reg, *ranges;
if (!node->parent)
return; /* Ignore root node */
reg = get_property(node, "reg");
ranges = get_property(node, "ranges");
if (!reg && !ranges)
return;
if (node->parent->addr_cells == -1)
FAIL(c, dti, "Relying on default #address-cells value for %s",
node->fullpath);
if (node->parent->size_cells == -1)
FAIL(c, dti, "Relying on default #size-cells value for %s",
node->fullpath);
}
WARNING(avoid_default_addr_size, check_avoid_default_addr_size, NULL,
&addr_size_cells);
static void check_obsolete_chosen_interrupt_controller(struct check *c,
struct dt_info *dti,
struct node *node)
{
struct node *dt = dti->dt;
struct node *chosen;
struct property *prop;
if (node != dt)
return;
chosen = get_node_by_path(dt, "/chosen");
if (!chosen)
return;
prop = get_property(chosen, "interrupt-controller");
if (prop)
FAIL(c, dti, "/chosen has obsolete \"interrupt-controller\" "
"property");
}
WARNING(obsolete_chosen_interrupt_controller,
check_obsolete_chosen_interrupt_controller, NULL);
struct provider {
const char *prop_name;
const char *cell_name;
bool optional;
};
static void check_property_phandle_args(struct check *c,
struct dt_info *dti,
struct node *node,
struct property *prop,
const struct provider *provider)
{
struct node *root = dti->dt;
int cell, cellsize = 0;
if (prop->val.len % sizeof(cell_t)) {
FAIL(c, dti, "property '%s' size (%d) is invalid, expected multiple of %zu in node %s",
prop->name, prop->val.len, sizeof(cell_t), node->fullpath);
return;
}
for (cell = 0; cell < prop->val.len / sizeof(cell_t); cell += cellsize + 1) {
struct node *provider_node;
struct property *cellprop;
int phandle;
phandle = propval_cell_n(prop, cell);
/*
* Some bindings use a cell value 0 or -1 to skip over optional
* entries when each index position has a specific definition.
*/
if (phandle == 0 || phandle == -1) {
/* Give up if this is an overlay with external references */
if (dti->dtsflags & DTSF_PLUGIN)
break;
cellsize = 0;
continue;
}
/* If we have markers, verify the current cell is a phandle */
if (prop->val.markers) {
struct marker *m = prop->val.markers;
for_each_marker_of_type(m, REF_PHANDLE) {
if (m->offset == (cell * sizeof(cell_t)))
break;
}
if (!m)
FAIL(c, dti, "Property '%s', cell %d is not a phandle reference in %s",
prop->name, cell, node->fullpath);
}
provider_node = get_node_by_phandle(root, phandle);
if (!provider_node) {
FAIL(c, dti, "Could not get phandle node for %s:%s(cell %d)",
node->fullpath, prop->name, cell);
break;
}
cellprop = get_property(provider_node, provider->cell_name);
if (cellprop) {
cellsize = propval_cell(cellprop);
} else if (provider->optional) {
cellsize = 0;
} else {
FAIL(c, dti, "Missing property '%s' in node %s or bad phandle (referred from %s:%s[%d])",
provider->cell_name,
provider_node->fullpath,
node->fullpath, prop->name, cell);
break;
}
if (prop->val.len < ((cell + cellsize + 1) * sizeof(cell_t))) {
FAIL(c, dti, "%s property size (%d) too small for cell size %d in %s",
prop->name, prop->val.len, cellsize, node->fullpath);
}
}
}
static void check_provider_cells_property(struct check *c,
struct dt_info *dti,
struct node *node)
{
struct provider *provider = c->data;
struct property *prop;
prop = get_property(node, provider->prop_name);
if (!prop)
return;
check_property_phandle_args(c, dti, node, prop, provider);
}
#define WARNING_PROPERTY_PHANDLE_CELLS(nm, propname, cells_name, ...) \
static struct provider nm##_provider = { (propname), (cells_name), __VA_ARGS__ }; \
WARNING(nm##_property, check_provider_cells_property, &nm##_provider, &phandle_references);
WARNING_PROPERTY_PHANDLE_CELLS(clocks, "clocks", "#clock-cells");
WARNING_PROPERTY_PHANDLE_CELLS(cooling_device, "cooling-device", "#cooling-cells");
WARNING_PROPERTY_PHANDLE_CELLS(dmas, "dmas", "#dma-cells");
WARNING_PROPERTY_PHANDLE_CELLS(hwlocks, "hwlocks", "#hwlock-cells");
WARNING_PROPERTY_PHANDLE_CELLS(interrupts_extended, "interrupts-extended", "#interrupt-cells");
WARNING_PROPERTY_PHANDLE_CELLS(io_channels, "io-channels", "#io-channel-cells");
WARNING_PROPERTY_PHANDLE_CELLS(iommus, "iommus", "#iommu-cells");
WARNING_PROPERTY_PHANDLE_CELLS(mboxes, "mboxes", "#mbox-cells");
WARNING_PROPERTY_PHANDLE_CELLS(msi_parent, "msi-parent", "#msi-cells", true);
WARNING_PROPERTY_PHANDLE_CELLS(mux_controls, "mux-controls", "#mux-control-cells");
WARNING_PROPERTY_PHANDLE_CELLS(phys, "phys", "#phy-cells");
WARNING_PROPERTY_PHANDLE_CELLS(power_domains, "power-domains", "#power-domain-cells");
WARNING_PROPERTY_PHANDLE_CELLS(pwms, "pwms", "#pwm-cells");
WARNING_PROPERTY_PHANDLE_CELLS(resets, "resets", "#reset-cells");
WARNING_PROPERTY_PHANDLE_CELLS(sound_dais, "sound-dais", "#sound-dai-cells");
WARNING_PROPERTY_PHANDLE_CELLS(thermal_sensors, "thermal-sensors", "#thermal-sensor-cells");
static bool prop_is_gpio(struct property *prop)
{
char *str;
/*
* *-gpios and *-gpio can appear in property names,
* so skip over any false matches (only one known ATM)
*/
if (strstr(prop->name, "nr-gpio"))
return false;
str = strrchr(prop->name, '-');
if (str)
str++;
else
str = prop->name;
if (!(streq(str, "gpios") || streq(str, "gpio")))
return false;
return true;
}
static void check_gpios_property(struct check *c,
struct dt_info *dti,
struct node *node)
{
struct property *prop;
/* Skip GPIO hog nodes which have 'gpios' property */
if (get_property(node, "gpio-hog"))
return;
for_each_property(node, prop) {
struct provider provider;
if (!prop_is_gpio(prop))
continue;
provider.prop_name = prop->name;
provider.cell_name = "#gpio-cells";
provider.optional = false;
check_property_phandle_args(c, dti, node, prop, &provider);
}
}
WARNING(gpios_property, check_gpios_property, NULL, &phandle_references);
static void check_deprecated_gpio_property(struct check *c,
struct dt_info *dti,
struct node *node)
{
struct property *prop;
for_each_property(node, prop) {
char *str;
if (!prop_is_gpio(prop))
continue;
str = strstr(prop->name, "gpio");
if (!streq(str, "gpio"))
continue;
FAIL(c, dti, "'[*-]gpio' is deprecated, use '[*-]gpios' instead for %s:%s",
node->fullpath, prop->name);
}
}
CHECK(deprecated_gpio_property, check_deprecated_gpio_property, NULL);
static bool node_is_interrupt_provider(struct node *node)
{
struct property *prop;
prop = get_property(node, "interrupt-controller");
if (prop)
return true;
prop = get_property(node, "interrupt-map");
if (prop)
return true;
return false;
}
static void check_interrupts_property(struct check *c,
struct dt_info *dti,
struct node *node)
{
struct node *root = dti->dt;
struct node *irq_node = NULL, *parent = node;
struct property *irq_prop, *prop = NULL;
int irq_cells, phandle;
irq_prop = get_property(node, "interrupts");
if (!irq_prop)
return;
if (irq_prop->val.len % sizeof(cell_t))
FAIL(c, dti, "property '%s' size (%d) is invalid, expected multiple of %zu in node %s",
irq_prop->name, irq_prop->val.len, sizeof(cell_t),
node->fullpath);
while (parent && !prop) {
if (parent != node && node_is_interrupt_provider(parent)) {
irq_node = parent;
break;
}
prop = get_property(parent, "interrupt-parent");
if (prop) {
phandle = propval_cell(prop);
/* Give up if this is an overlay with external references */
if ((phandle == 0 || phandle == -1) &&
(dti->dtsflags & DTSF_PLUGIN))
return;
irq_node = get_node_by_phandle(root, phandle);
if (!irq_node) {
FAIL(c, dti, "Bad interrupt-parent phandle for %s",
node->fullpath);
return;
}
if (!node_is_interrupt_provider(irq_node))
FAIL(c, dti,
"Missing interrupt-controller or interrupt-map property in %s",
irq_node->fullpath);
break;
}
parent = parent->parent;
}
if (!irq_node) {
FAIL(c, dti, "Missing interrupt-parent for %s", node->fullpath);
return;
}
prop = get_property(irq_node, "#interrupt-cells");
if (!prop) {
FAIL(c, dti, "Missing #interrupt-cells in interrupt-parent %s",
irq_node->fullpath);
return;
}
irq_cells = propval_cell(prop);
if (irq_prop->val.len % (irq_cells * sizeof(cell_t))) {
FAIL(c, dti,
"interrupts size is (%d), expected multiple of %d in %s",
irq_prop->val.len, (int)(irq_cells * sizeof(cell_t)),
node->fullpath);
}
}
WARNING(interrupts_property, check_interrupts_property, &phandle_references);
static struct check *check_table[] = {
&duplicate_node_names, &duplicate_property_names,
&node_name_chars, &node_name_format, &property_name_chars,
&name_is_string, &name_properties,
&duplicate_label,
&explicit_phandles,
&phandle_references, &path_references,
&address_cells_is_cell, &size_cells_is_cell, &interrupt_cells_is_cell,
&device_type_is_string, &model_is_string, &status_is_string,
&property_name_chars_strict,
&node_name_chars_strict,
&addr_size_cells, &reg_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,
&clocks_property,
&cooling_device_property,
&dmas_property,
&hwlocks_property,
&interrupts_extended_property,
&io_channels_property,
&iommus_property,
&mboxes_property,
&msi_parent_property,
&mux_controls_property,
&phys_property,
&power_domains_property,
&pwms_property,
&resets_property,
&sound_dais_property,
&thermal_sensors_property,
&deprecated_gpio_property,
&gpios_property,
&interrupts_property,
&always_fail,
};
static void enable_warning_error(struct check *c, bool warn, bool error)
{
int i;
/* Raising level, also raise it for prereqs */
if ((warn && !c->warn) || (error && !c->error))
for (i = 0; i < c->num_prereqs; i++)
enable_warning_error(c->prereq[i], warn, error);
c->warn = c->warn || warn;
c->error = c->error || error;
}
static void disable_warning_error(struct check *c, bool warn, bool error)
{
int i;
/* Lowering level, also lower it for things this is the prereq
* for */
if ((warn && c->warn) || (error && c->error)) {
for (i = 0; i < ARRAY_SIZE(check_table); i++) {
struct check *cc = check_table[i];
int j;
for (j = 0; j < cc->num_prereqs; j++)
if (cc->prereq[j] == c)
disable_warning_error(cc, warn, error);
}
}
c->warn = c->warn && !warn;
c->error = c->error && !error;
}
void parse_checks_option(bool warn, bool error, const char *arg)
{
int i;
const char *name = arg;
bool enable = true;
if ((strncmp(arg, "no-", 3) == 0)
|| (strncmp(arg, "no_", 3) == 0)) {
name = arg + 3;
enable = false;
}
for (i = 0; i < ARRAY_SIZE(check_table); i++) {
struct check *c = check_table[i];
if (streq(c->name, name)) {
if (enable)
enable_warning_error(c, warn, error);
else
disable_warning_error(c, warn, error);
return;
}
}
die("Unrecognized check name \"%s\"\n", name);
}
void process_checks(bool force, struct dt_info *dti)
{
int i;
int error = 0;
for (i = 0; i < ARRAY_SIZE(check_table); i++) {
struct check *c = check_table[i];
if (c->warn || c->error)
error = error || run_check(c, dti);
}
if (error) {
if (!force) {
fprintf(stderr, "ERROR: Input tree has errors, aborting "
"(use -f to force output)\n");
exit(2);
} else if (quiet < 3) {
fprintf(stderr, "Warning: Input tree has errors, "
"output forced\n");
}
}
}
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