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linux/drivers/of/unittest.c

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// SPDX-License-Identifier: GPL-2.0
/*
* Self tests for device tree subsystem
*/
#define pr_fmt(fmt) "### dt-test ### " fmt
#include <linux/clk.h>
#include <linux/err.h>
#include <linux/errno.h>
#include <linux/hashtable.h>
#include <linux/libfdt.h>
#include <linux/of.h>
#include <linux/of_fdt.h>
#include <linux/of_irq.h>
#include <linux/of_platform.h>
#include <linux/list.h>
#include <linux/mutex.h>
#include <linux/slab.h>
#include <linux/device.h>
#include <linux/platform_device.h>
#include <linux/i2c.h>
#include <linux/i2c-mux.h>
#include <linux/bitops.h>
#include "of_private.h"
static struct unittest_results {
int passed;
int failed;
} unittest_results;
#define unittest(result, fmt, ...) ({ \
bool failed = !(result); \
if (failed) { \
unittest_results.failed++; \
pr_err("FAIL %s():%i " fmt, __func__, __LINE__, ##__VA_ARGS__); \
} else { \
unittest_results.passed++; \
pr_debug("pass %s():%i\n", __func__, __LINE__); \
} \
failed; \
})
static void __init of_unittest_find_node_by_name(void)
{
struct device_node *np;
const char *options, *name;
np = of_find_node_by_path("/testcase-data");
name = kasprintf(GFP_KERNEL, "%pOF", np);
unittest(np && !strcmp("/testcase-data", name),
"find /testcase-data failed\n");
of_node_put(np);
kfree(name);
/* Test if trailing '/' works */
np = of_find_node_by_path("/testcase-data/");
unittest(!np, "trailing '/' on /testcase-data/ should fail\n");
np = of_find_node_by_path("/testcase-data/phandle-tests/consumer-a");
name = kasprintf(GFP_KERNEL, "%pOF", np);
unittest(np && !strcmp("/testcase-data/phandle-tests/consumer-a", name),
"find /testcase-data/phandle-tests/consumer-a failed\n");
of_node_put(np);
kfree(name);
np = of_find_node_by_path("testcase-alias");
name = kasprintf(GFP_KERNEL, "%pOF", np);
unittest(np && !strcmp("/testcase-data", name),
"find testcase-alias failed\n");
of_node_put(np);
kfree(name);
/* Test if trailing '/' works on aliases */
np = of_find_node_by_path("testcase-alias/");
unittest(!np, "trailing '/' on testcase-alias/ should fail\n");
np = of_find_node_by_path("testcase-alias/phandle-tests/consumer-a");
name = kasprintf(GFP_KERNEL, "%pOF", np);
unittest(np && !strcmp("/testcase-data/phandle-tests/consumer-a", name),
"find testcase-alias/phandle-tests/consumer-a failed\n");
of_node_put(np);
kfree(name);
np = of_find_node_by_path("/testcase-data/missing-path");
unittest(!np, "non-existent path returned node %pOF\n", np);
of_node_put(np);
np = of_find_node_by_path("missing-alias");
unittest(!np, "non-existent alias returned node %pOF\n", np);
of_node_put(np);
np = of_find_node_by_path("testcase-alias/missing-path");
unittest(!np, "non-existent alias with relative path returned node %pOF\n", np);
of_node_put(np);
np = of_find_node_opts_by_path("/testcase-data:testoption", &options);
unittest(np && !strcmp("testoption", options),
"option path test failed\n");
of_node_put(np);
np = of_find_node_opts_by_path("/testcase-data:test/option", &options);
unittest(np && !strcmp("test/option", options),
"option path test, subcase #1 failed\n");
of_node_put(np);
np = of_find_node_opts_by_path("/testcase-data/testcase-device1:test/option", &options);
unittest(np && !strcmp("test/option", options),
"option path test, subcase #2 failed\n");
of_node_put(np);
np = of_find_node_opts_by_path("/testcase-data:testoption", NULL);
unittest(np, "NULL option path test failed\n");
of_node_put(np);
np = of_find_node_opts_by_path("testcase-alias:testaliasoption",
&options);
unittest(np && !strcmp("testaliasoption", options),
"option alias path test failed\n");
of_node_put(np);
np = of_find_node_opts_by_path("testcase-alias:test/alias/option",
&options);
unittest(np && !strcmp("test/alias/option", options),
"option alias path test, subcase #1 failed\n");
of_node_put(np);
np = of_find_node_opts_by_path("testcase-alias:testaliasoption", NULL);
unittest(np, "NULL option alias path test failed\n");
of_node_put(np);
options = "testoption";
np = of_find_node_opts_by_path("testcase-alias", &options);
unittest(np && !options, "option clearing test failed\n");
of_node_put(np);
options = "testoption";
np = of_find_node_opts_by_path("/", &options);
unittest(np && !options, "option clearing root node test failed\n");
of_node_put(np);
}
static void __init of_unittest_dynamic(void)
{
struct device_node *np;
struct property *prop;
np = of_find_node_by_path("/testcase-data");
if (!np) {
pr_err("missing testcase data\n");
return;
}
/* Array of 4 properties for the purpose of testing */
prop = kzalloc(sizeof(*prop) * 4, GFP_KERNEL);
if (!prop) {
unittest(0, "kzalloc() failed\n");
return;
}
/* Add a new property - should pass*/
prop->name = "new-property";
prop->value = "new-property-data";
prop->length = strlen(prop->value);
unittest(of_add_property(np, prop) == 0, "Adding a new property failed\n");
/* Try to add an existing property - should fail */
prop++;
prop->name = "new-property";
prop->value = "new-property-data-should-fail";
prop->length = strlen(prop->value);
unittest(of_add_property(np, prop) != 0,
"Adding an existing property should have failed\n");
/* Try to modify an existing property - should pass */
prop->value = "modify-property-data-should-pass";
prop->length = strlen(prop->value);
unittest(of_update_property(np, prop) == 0,
"Updating an existing property should have passed\n");
/* Try to modify non-existent property - should pass*/
prop++;
prop->name = "modify-property";
prop->value = "modify-missing-property-data-should-pass";
prop->length = strlen(prop->value);
unittest(of_update_property(np, prop) == 0,
"Updating a missing property should have passed\n");
/* Remove property - should pass */
unittest(of_remove_property(np, prop) == 0,
"Removing a property should have passed\n");
/* Adding very large property - should pass */
prop++;
prop->name = "large-property-PAGE_SIZEx8";
prop->length = PAGE_SIZE * 8;
prop->value = kzalloc(prop->length, GFP_KERNEL);
unittest(prop->value != NULL, "Unable to allocate large buffer\n");
if (prop->value)
unittest(of_add_property(np, prop) == 0,
"Adding a large property should have passed\n");
}
static int __init of_unittest_check_node_linkage(struct device_node *np)
{
struct device_node *child;
int count = 0, rc;
for_each_child_of_node(np, child) {
if (child->parent != np) {
pr_err("Child node %s links to wrong parent %s\n",
child->name, np->name);
rc = -EINVAL;
goto put_child;
}
rc = of_unittest_check_node_linkage(child);
if (rc < 0)
goto put_child;
count += rc;
}
return count + 1;
put_child:
of_node_put(child);
return rc;
}
static void __init of_unittest_check_tree_linkage(void)
{
struct device_node *np;
int allnode_count = 0, child_count;
if (!of_root)
return;
for_each_of_allnodes(np)
allnode_count++;
child_count = of_unittest_check_node_linkage(of_root);
unittest(child_count > 0, "Device node data structure is corrupted\n");
unittest(child_count == allnode_count,
"allnodes list size (%i) doesn't match sibling lists size (%i)\n",
allnode_count, child_count);
pr_debug("allnodes list size (%i); sibling lists size (%i)\n", allnode_count, child_count);
}
static void __init of_unittest_printf_one(struct device_node *np, const char *fmt,
const char *expected)
{
unsigned char buf[strlen(expected)+10];
int size, i;
/* Baseline; check conversion with a large size limit */
memset(buf, 0xff, sizeof(buf));
size = snprintf(buf, sizeof(buf) - 2, fmt, np);
/* use strcmp() instead of strncmp() here to be absolutely sure strings match */
unittest((strcmp(buf, expected) == 0) && (buf[size+1] == 0xff),
"sprintf failed; fmt='%s' expected='%s' rslt='%s'\n",
fmt, expected, buf);
/* Make sure length limits work */
size++;
for (i = 0; i < 2; i++, size--) {
/* Clear the buffer, and make sure it works correctly still */
memset(buf, 0xff, sizeof(buf));
snprintf(buf, size+1, fmt, np);
unittest(strncmp(buf, expected, size) == 0 && (buf[size+1] == 0xff),
"snprintf failed; size=%i fmt='%s' expected='%s' rslt='%s'\n",
size, fmt, expected, buf);
}
}
static void __init of_unittest_printf(void)
{
struct device_node *np;
const char *full_name = "/testcase-data/platform-tests/test-device@1/dev@100";
char phandle_str[16] = "";
np = of_find_node_by_path(full_name);
if (!np) {
unittest(np, "testcase data missing\n");
return;
}
num_to_str(phandle_str, sizeof(phandle_str), np->phandle);
of_unittest_printf_one(np, "%pOF", full_name);
of_unittest_printf_one(np, "%pOFf", full_name);
of_unittest_printf_one(np, "%pOFp", phandle_str);
of_unittest_printf_one(np, "%pOFP", "dev@100");
of_unittest_printf_one(np, "ABC %pOFP ABC", "ABC dev@100 ABC");
of_unittest_printf_one(np, "%10pOFP", " dev@100");
of_unittest_printf_one(np, "%-10pOFP", "dev@100 ");
of_unittest_printf_one(of_root, "%pOFP", "/");
of_unittest_printf_one(np, "%pOFF", "----");
of_unittest_printf_one(np, "%pOFPF", "dev@100:----");
of_unittest_printf_one(np, "%pOFPFPc", "dev@100:----:dev@100:test-sub-device");
of_unittest_printf_one(np, "%pOFc", "test-sub-device");
of_unittest_printf_one(np, "%pOFC",
"\"test-sub-device\",\"test-compat2\",\"test-compat3\"");
}
struct node_hash {
struct hlist_node node;
struct device_node *np;
};
static DEFINE_HASHTABLE(phandle_ht, 8);
static void __init of_unittest_check_phandles(void)
{
struct device_node *np;
struct node_hash *nh;
struct hlist_node *tmp;
int i, dup_count = 0, phandle_count = 0;
for_each_of_allnodes(np) {
if (!np->phandle)
continue;
hash_for_each_possible(phandle_ht, nh, node, np->phandle) {
if (nh->np->phandle == np->phandle) {
pr_info("Duplicate phandle! %i used by %pOF and %pOF\n",
np->phandle, nh->np, np);
dup_count++;
break;
}
}
nh = kzalloc(sizeof(*nh), GFP_KERNEL);
if (WARN_ON(!nh))
return;
nh->np = np;
hash_add(phandle_ht, &nh->node, np->phandle);
phandle_count++;
}
unittest(dup_count == 0, "Found %i duplicates in %i phandles\n",
dup_count, phandle_count);
/* Clean up */
hash_for_each_safe(phandle_ht, i, tmp, nh, node) {
hash_del(&nh->node);
kfree(nh);
}
}
static void __init of_unittest_parse_phandle_with_args(void)
{
struct device_node *np;
struct of_phandle_args args;
int i, rc;
np = of_find_node_by_path("/testcase-data/phandle-tests/consumer-a");
if (!np) {
pr_err("missing testcase data\n");
return;
}
rc = of_count_phandle_with_args(np, "phandle-list", "#phandle-cells");
unittest(rc == 7, "of_count_phandle_with_args() returned %i, expected 7\n", rc);
for (i = 0; i < 8; i++) {
bool passed = true;
rc = of_parse_phandle_with_args(np, "phandle-list",
"#phandle-cells", i, &args);
/* Test the values from tests-phandle.dtsi */
switch (i) {
case 0:
passed &= !rc;
passed &= (args.args_count == 1);
passed &= (args.args[0] == (i + 1));
break;
case 1:
passed &= !rc;
passed &= (args.args_count == 2);
passed &= (args.args[0] == (i + 1));
passed &= (args.args[1] == 0);
break;
case 2:
passed &= (rc == -ENOENT);
break;
case 3:
passed &= !rc;
passed &= (args.args_count == 3);
passed &= (args.args[0] == (i + 1));
passed &= (args.args[1] == 4);
passed &= (args.args[2] == 3);
break;
case 4:
passed &= !rc;
passed &= (args.args_count == 2);
passed &= (args.args[0] == (i + 1));
passed &= (args.args[1] == 100);
break;
case 5:
passed &= !rc;
passed &= (args.args_count == 0);
break;
case 6:
passed &= !rc;
passed &= (args.args_count == 1);
passed &= (args.args[0] == (i + 1));
break;
case 7:
passed &= (rc == -ENOENT);
break;
default:
passed = false;
}
unittest(passed, "index %i - data error on node %pOF rc=%i\n",
i, args.np, rc);
}
/* Check for missing list property */
rc = of_parse_phandle_with_args(np, "phandle-list-missing",
"#phandle-cells", 0, &args);
unittest(rc == -ENOENT, "expected:%i got:%i\n", -ENOENT, rc);
rc = of_count_phandle_with_args(np, "phandle-list-missing",
"#phandle-cells");
unittest(rc == -ENOENT, "expected:%i got:%i\n", -ENOENT, rc);
/* Check for missing cells property */
rc = of_parse_phandle_with_args(np, "phandle-list",
"#phandle-cells-missing", 0, &args);
unittest(rc == -EINVAL, "expected:%i got:%i\n", -EINVAL, rc);
rc = of_count_phandle_with_args(np, "phandle-list",
"#phandle-cells-missing");
unittest(rc == -EINVAL, "expected:%i got:%i\n", -EINVAL, rc);
/* Check for bad phandle in list */
rc = of_parse_phandle_with_args(np, "phandle-list-bad-phandle",
"#phandle-cells", 0, &args);
unittest(rc == -EINVAL, "expected:%i got:%i\n", -EINVAL, rc);
rc = of_count_phandle_with_args(np, "phandle-list-bad-phandle",
"#phandle-cells");
unittest(rc == -EINVAL, "expected:%i got:%i\n", -EINVAL, rc);
/* Check for incorrectly formed argument list */
rc = of_parse_phandle_with_args(np, "phandle-list-bad-args",
"#phandle-cells", 1, &args);
unittest(rc == -EINVAL, "expected:%i got:%i\n", -EINVAL, rc);
rc = of_count_phandle_with_args(np, "phandle-list-bad-args",
"#phandle-cells");
unittest(rc == -EINVAL, "expected:%i got:%i\n", -EINVAL, rc);
}
static void __init of_unittest_property_string(void)
{
const char *strings[4];
struct device_node *np;
int rc;
np = of_find_node_by_path("/testcase-data/phandle-tests/consumer-a");
if (!np) {
pr_err("No testcase data in device tree\n");
return;
}
rc = of_property_match_string(np, "phandle-list-names", "first");
unittest(rc == 0, "first expected:0 got:%i\n", rc);
rc = of_property_match_string(np, "phandle-list-names", "second");
unittest(rc == 1, "second expected:1 got:%i\n", rc);
rc = of_property_match_string(np, "phandle-list-names", "third");
unittest(rc == 2, "third expected:2 got:%i\n", rc);
rc = of_property_match_string(np, "phandle-list-names", "fourth");
unittest(rc == -ENODATA, "unmatched string; rc=%i\n", rc);
rc = of_property_match_string(np, "missing-property", "blah");
unittest(rc == -EINVAL, "missing property; rc=%i\n", rc);
rc = of_property_match_string(np, "empty-property", "blah");
unittest(rc == -ENODATA, "empty property; rc=%i\n", rc);
rc = of_property_match_string(np, "unterminated-string", "blah");
unittest(rc == -EILSEQ, "unterminated string; rc=%i\n", rc);
/* of_property_count_strings() tests */
rc = of_property_count_strings(np, "string-property");
unittest(rc == 1, "Incorrect string count; rc=%i\n", rc);
rc = of_property_count_strings(np, "phandle-list-names");
unittest(rc == 3, "Incorrect string count; rc=%i\n", rc);
rc = of_property_count_strings(np, "unterminated-string");
unittest(rc == -EILSEQ, "unterminated string; rc=%i\n", rc);
rc = of_property_count_strings(np, "unterminated-string-list");
unittest(rc == -EILSEQ, "unterminated string array; rc=%i\n", rc);
/* of_property_read_string_index() tests */
rc = of_property_read_string_index(np, "string-property", 0, strings);
unittest(rc == 0 && !strcmp(strings[0], "foobar"), "of_property_read_string_index() failure; rc=%i\n", rc);
strings[0] = NULL;
rc = of_property_read_string_index(np, "string-property", 1, strings);
unittest(rc == -ENODATA && strings[0] == NULL, "of_property_read_string_index() failure; rc=%i\n", rc);
rc = of_property_read_string_index(np, "phandle-list-names", 0, strings);
unittest(rc == 0 && !strcmp(strings[0], "first"), "of_property_read_string_index() failure; rc=%i\n", rc);
rc = of_property_read_string_index(np, "phandle-list-names", 1, strings);
unittest(rc == 0 && !strcmp(strings[0], "second"), "of_property_read_string_index() failure; rc=%i\n", rc);
rc = of_property_read_string_index(np, "phandle-list-names", 2, strings);
unittest(rc == 0 && !strcmp(strings[0], "third"), "of_property_read_string_index() failure; rc=%i\n", rc);
strings[0] = NULL;
rc = of_property_read_string_index(np, "phandle-list-names", 3, strings);
unittest(rc == -ENODATA && strings[0] == NULL, "of_property_read_string_index() failure; rc=%i\n", rc);
strings[0] = NULL;
rc = of_property_read_string_index(np, "unterminated-string", 0, strings);
unittest(rc == -EILSEQ && strings[0] == NULL, "of_property_read_string_index() failure; rc=%i\n", rc);
rc = of_property_read_string_index(np, "unterminated-string-list", 0, strings);
unittest(rc == 0 && !strcmp(strings[0], "first"), "of_property_read_string_index() failure; rc=%i\n", rc);
strings[0] = NULL;
rc = of_property_read_string_index(np, "unterminated-string-list", 2, strings); /* should fail */
unittest(rc == -EILSEQ && strings[0] == NULL, "of_property_read_string_index() failure; rc=%i\n", rc);
strings[1] = NULL;
/* of_property_read_string_array() tests */
rc = of_property_read_string_array(np, "string-property", strings, 4);
unittest(rc == 1, "Incorrect string count; rc=%i\n", rc);
rc = of_property_read_string_array(np, "phandle-list-names", strings, 4);
unittest(rc == 3, "Incorrect string count; rc=%i\n", rc);
rc = of_property_read_string_array(np, "unterminated-string", strings, 4);
unittest(rc == -EILSEQ, "unterminated string; rc=%i\n", rc);
/* -- An incorrectly formed string should cause a failure */
rc = of_property_read_string_array(np, "unterminated-string-list", strings, 4);
unittest(rc == -EILSEQ, "unterminated string array; rc=%i\n", rc);
/* -- parsing the correctly formed strings should still work: */
strings[2] = NULL;
rc = of_property_read_string_array(np, "unterminated-string-list", strings, 2);
unittest(rc == 2 && strings[2] == NULL, "of_property_read_string_array() failure; rc=%i\n", rc);
strings[1] = NULL;
rc = of_property_read_string_array(np, "phandle-list-names", strings, 1);
unittest(rc == 1 && strings[1] == NULL, "Overwrote end of string array; rc=%i, str='%s'\n", rc, strings[1]);
}
#define propcmp(p1, p2) (((p1)->length == (p2)->length) && \
(p1)->value && (p2)->value && \
!memcmp((p1)->value, (p2)->value, (p1)->length) && \
!strcmp((p1)->name, (p2)->name))
static void __init of_unittest_property_copy(void)
{
#ifdef CONFIG_OF_DYNAMIC
struct property p1 = { .name = "p1", .length = 0, .value = "" };
struct property p2 = { .name = "p2", .length = 5, .value = "abcd" };
struct property *new;
new = __of_prop_dup(&p1, GFP_KERNEL);
unittest(new && propcmp(&p1, new), "empty property didn't copy correctly\n");
kfree(new->value);
kfree(new->name);
kfree(new);
new = __of_prop_dup(&p2, GFP_KERNEL);
unittest(new && propcmp(&p2, new), "non-empty property didn't copy correctly\n");
kfree(new->value);
kfree(new->name);
kfree(new);
#endif
}
static void __init of_unittest_changeset(void)
{
#ifdef CONFIG_OF_DYNAMIC
struct property *ppadd, padd = { .name = "prop-add", .length = 0, .value = "" };
struct property *ppupdate, pupdate = { .name = "prop-update", .length = 5, .value = "abcd" };
struct property *ppremove;
struct device_node *n1, *n2, *n21, *nremove, *parent, *np;
struct of_changeset chgset;
n1 = __of_node_dup(NULL, "/testcase-data/changeset/n1");
unittest(n1, "testcase setup failure\n");
n2 = __of_node_dup(NULL, "/testcase-data/changeset/n2");
unittest(n2, "testcase setup failure\n");
n21 = __of_node_dup(NULL, "%s/%s", "/testcase-data/changeset/n2", "n21");
unittest(n21, "testcase setup failure %p\n", n21);
nremove = of_find_node_by_path("/testcase-data/changeset/node-remove");
unittest(nremove, "testcase setup failure\n");
ppadd = __of_prop_dup(&padd, GFP_KERNEL);
unittest(ppadd, "testcase setup failure\n");
ppupdate = __of_prop_dup(&pupdate, GFP_KERNEL);
unittest(ppupdate, "testcase setup failure\n");
parent = nremove->parent;
n1->parent = parent;
n2->parent = parent;
n21->parent = n2;
n2->child = n21;
ppremove = of_find_property(parent, "prop-remove", NULL);
unittest(ppremove, "failed to find removal prop");
of_changeset_init(&chgset);
unittest(!of_changeset_attach_node(&chgset, n1), "fail attach n1\n");
unittest(!of_changeset_attach_node(&chgset, n2), "fail attach n2\n");
unittest(!of_changeset_detach_node(&chgset, nremove), "fail remove node\n");
unittest(!of_changeset_attach_node(&chgset, n21), "fail attach n21\n");
unittest(!of_changeset_add_property(&chgset, parent, ppadd), "fail add prop\n");
unittest(!of_changeset_update_property(&chgset, parent, ppupdate), "fail update prop\n");
unittest(!of_changeset_remove_property(&chgset, parent, ppremove), "fail remove prop\n");
unittest(!of_changeset_apply(&chgset), "apply failed\n");
/* Make sure node names are constructed correctly */
unittest((np = of_find_node_by_path("/testcase-data/changeset/n2/n21")),
"'%pOF' not added\n", n21);
of_node_put(np);
unittest(!of_changeset_revert(&chgset), "revert failed\n");
of_changeset_destroy(&chgset);
#endif
}
static void __init of_unittest_parse_interrupts(void)
{
struct device_node *np;
struct of_phandle_args args;
int i, rc;
np = of_find_node_by_path("/testcase-data/interrupts/interrupts0");
if (!np) {
pr_err("missing testcase data\n");
return;
}
for (i = 0; i < 4; i++) {
bool passed = true;
args.args_count = 0;
rc = of_irq_parse_one(np, i, &args);
passed &= !rc;
passed &= (args.args_count == 1);
passed &= (args.args[0] == (i + 1));
unittest(passed, "index %i - data error on node %pOF rc=%i\n",
i, args.np, rc);
}
of_node_put(np);
np = of_find_node_by_path("/testcase-data/interrupts/interrupts1");
if (!np) {
pr_err("missing testcase data\n");
return;
}
for (i = 0; i < 4; i++) {
bool passed = true;
args.args_count = 0;
rc = of_irq_parse_one(np, i, &args);
/* Test the values from tests-phandle.dtsi */
switch (i) {
case 0:
passed &= !rc;
passed &= (args.args_count == 1);
passed &= (args.args[0] == 9);
break;
case 1:
passed &= !rc;
passed &= (args.args_count == 3);
passed &= (args.args[0] == 10);
passed &= (args.args[1] == 11);
passed &= (args.args[2] == 12);
break;
case 2:
passed &= !rc;
passed &= (args.args_count == 2);
passed &= (args.args[0] == 13);
passed &= (args.args[1] == 14);
break;
case 3:
passed &= !rc;
passed &= (args.args_count == 2);
passed &= (args.args[0] == 15);
passed &= (args.args[1] == 16);
break;
default:
passed = false;
}
unittest(passed, "index %i - data error on node %pOF rc=%i\n",
i, args.np, rc);
}
of_node_put(np);
}
static void __init of_unittest_parse_interrupts_extended(void)
{
struct device_node *np;
struct of_phandle_args args;
int i, rc;
np = of_find_node_by_path("/testcase-data/interrupts/interrupts-extended0");
if (!np) {
pr_err("missing testcase data\n");
return;
}
for (i = 0; i < 7; i++) {
bool passed = true;
rc = of_irq_parse_one(np, i, &args);
/* Test the values from tests-phandle.dtsi */
switch (i) {
case 0:
passed &= !rc;
passed &= (args.args_count == 1);
passed &= (args.args[0] == 1);
break;
case 1:
passed &= !rc;
passed &= (args.args_count == 3);
passed &= (args.args[0] == 2);
passed &= (args.args[1] == 3);
passed &= (args.args[2] == 4);
break;
case 2:
passed &= !rc;
passed &= (args.args_count == 2);
passed &= (args.args[0] == 5);
passed &= (args.args[1] == 6);
break;
case 3:
passed &= !rc;
passed &= (args.args_count == 1);
passed &= (args.args[0] == 9);
break;
case 4:
passed &= !rc;
passed &= (args.args_count == 3);
passed &= (args.args[0] == 10);
passed &= (args.args[1] == 11);
passed &= (args.args[2] == 12);
break;
case 5:
passed &= !rc;
passed &= (args.args_count == 2);
passed &= (args.args[0] == 13);
passed &= (args.args[1] == 14);
break;
case 6:
passed &= !rc;
passed &= (args.args_count == 1);
passed &= (args.args[0] == 15);
break;
default:
passed = false;
}
unittest(passed, "index %i - data error on node %pOF rc=%i\n",
i, args.np, rc);
}
of_node_put(np);
}
static const struct of_device_id match_node_table[] = {
{ .data = "A", .name = "name0", }, /* Name alone is lowest priority */
{ .data = "B", .type = "type1", }, /* followed by type alone */
{ .data = "Ca", .name = "name2", .type = "type1", }, /* followed by both together */
{ .data = "Cb", .name = "name2", }, /* Only match when type doesn't match */
{ .data = "Cc", .name = "name2", .type = "type2", },
{ .data = "E", .compatible = "compat3" },
{ .data = "G", .compatible = "compat2", },
{ .data = "H", .compatible = "compat2", .name = "name5", },
{ .data = "I", .compatible = "compat2", .type = "type1", },
{ .data = "J", .compatible = "compat2", .type = "type1", .name = "name8", },
{ .data = "K", .compatible = "compat2", .name = "name9", },
{}
};
static struct {
const char *path;
const char *data;
} match_node_tests[] = {
{ .path = "/testcase-data/match-node/name0", .data = "A", },
{ .path = "/testcase-data/match-node/name1", .data = "B", },
{ .path = "/testcase-data/match-node/a/name2", .data = "Ca", },
{ .path = "/testcase-data/match-node/b/name2", .data = "Cb", },
{ .path = "/testcase-data/match-node/c/name2", .data = "Cc", },
{ .path = "/testcase-data/match-node/name3", .data = "E", },
{ .path = "/testcase-data/match-node/name4", .data = "G", },
{ .path = "/testcase-data/match-node/name5", .data = "H", },
{ .path = "/testcase-data/match-node/name6", .data = "G", },
{ .path = "/testcase-data/match-node/name7", .data = "I", },
{ .path = "/testcase-data/match-node/name8", .data = "J", },
{ .path = "/testcase-data/match-node/name9", .data = "K", },
};
static void __init of_unittest_match_node(void)
{
struct device_node *np;
const struct of_device_id *match;
int i;
for (i = 0; i < ARRAY_SIZE(match_node_tests); i++) {
np = of_find_node_by_path(match_node_tests[i].path);
if (!np) {
unittest(0, "missing testcase node %s\n",
match_node_tests[i].path);
continue;
}
match = of_match_node(match_node_table, np);
if (!match) {
unittest(0, "%s didn't match anything\n",
match_node_tests[i].path);
continue;
}
if (strcmp(match->data, match_node_tests[i].data) != 0) {
unittest(0, "%s got wrong match. expected %s, got %s\n",
match_node_tests[i].path, match_node_tests[i].data,
(const char *)match->data);
continue;
}
unittest(1, "passed");
}
}
static struct resource test_bus_res = {
.start = 0xfffffff8,
.end = 0xfffffff9,
.flags = IORESOURCE_MEM,
};
static const struct platform_device_info test_bus_info = {
.name = "unittest-bus",
};
static void __init of_unittest_platform_populate(void)
{
int irq, rc;
struct device_node *np, *child, *grandchild;
struct platform_device *pdev, *test_bus;
const struct of_device_id match[] = {
{ .compatible = "test-device", },
{}
};
np = of_find_node_by_path("/testcase-data");
of_platform_default_populate(np, NULL, NULL);
/* Test that a missing irq domain returns -EPROBE_DEFER */
np = of_find_node_by_path("/testcase-data/testcase-device1");
pdev = of_find_device_by_node(np);
unittest(pdev, "device 1 creation failed\n");
irq = platform_get_irq(pdev, 0);
unittest(irq == -EPROBE_DEFER, "device deferred probe failed - %d\n", irq);
/* Test that a parsing failure does not return -EPROBE_DEFER */
np = of_find_node_by_path("/testcase-data/testcase-device2");
pdev = of_find_device_by_node(np);
unittest(pdev, "device 2 creation failed\n");
irq = platform_get_irq(pdev, 0);
unittest(irq < 0 && irq != -EPROBE_DEFER, "device parsing error failed - %d\n", irq);
np = of_find_node_by_path("/testcase-data/platform-tests");
unittest(np, "No testcase data in device tree\n");
if (!np)
return;
test_bus = platform_device_register_full(&test_bus_info);
rc = PTR_ERR_OR_ZERO(test_bus);
unittest(!rc, "testbus registration failed; rc=%i\n", rc);
if (rc)
return;
test_bus->dev.of_node = np;
/*
* Add a dummy resource to the test bus node after it is
* registered to catch problems with un-inserted resources. The
* DT code doesn't insert the resources, and it has caused the
* kernel to oops in the past. This makes sure the same bug
* doesn't crop up again.
*/
platform_device_add_resources(test_bus, &test_bus_res, 1);
of_platform_populate(np, match, NULL, &test_bus->dev);
for_each_child_of_node(np, child) {
for_each_child_of_node(child, grandchild)
unittest(of_find_device_by_node(grandchild),
"Could not create device for node '%s'\n",
grandchild->name);
}
of_platform_depopulate(&test_bus->dev);
for_each_child_of_node(np, child) {
for_each_child_of_node(child, grandchild)
unittest(!of_find_device_by_node(grandchild),
"device didn't get destroyed '%s'\n",
grandchild->name);
}
platform_device_unregister(test_bus);
of_node_put(np);
}
/**
* update_node_properties - adds the properties
* of np into dup node (present in live tree) and
* updates parent of children of np to dup.
*
* @np: node already present in live tree
* @dup: node present in live tree to be updated
*/
static void update_node_properties(struct device_node *np,
struct device_node *dup)
{
struct property *prop;
struct device_node *child;
for_each_property_of_node(np, prop)
of_add_property(dup, prop);
for_each_child_of_node(np, child)
child->parent = dup;
}
/**
* attach_node_and_children - attaches nodes
* and its children to live tree
*
* @np: Node to attach to live tree
*/
static int attach_node_and_children(struct device_node *np)
{
struct device_node *next, *dup, *child;
unsigned long flags;
const char *full_name;
full_name = kasprintf(GFP_KERNEL, "%pOF", np);
dup = of_find_node_by_path(full_name);
kfree(full_name);
if (dup) {
update_node_properties(np, dup);
return 0;
}
child = np->child;
np->child = NULL;
mutex_lock(&of_mutex);
raw_spin_lock_irqsave(&devtree_lock, flags);
np->sibling = np->parent->child;
np->parent->child = np;
of_node_clear_flag(np, OF_DETACHED);
raw_spin_unlock_irqrestore(&devtree_lock, flags);
__of_attach_node_sysfs(np);
mutex_unlock(&of_mutex);
while (child) {
next = child->sibling;
attach_node_and_children(child);
child = next;
}
return 0;
}
/**
* unittest_data_add - Reads, copies data from
* linked tree and attaches it to the live tree
*/
static int __init unittest_data_add(void)
{
void *unittest_data;
struct device_node *unittest_data_node, *np;
/*
* __dtb_testcases_begin[] and __dtb_testcases_end[] are magically
* created by cmd_dt_S_dtb in scripts/Makefile.lib
*/
extern uint8_t __dtb_testcases_begin[];
extern uint8_t __dtb_testcases_end[];
const int size = __dtb_testcases_end - __dtb_testcases_begin;
int rc;
if (!size) {
pr_warn("%s: No testcase data to attach; not running tests\n",
__func__);
return -ENODATA;
}
/* creating copy */
unittest_data = kmemdup(__dtb_testcases_begin, size, GFP_KERNEL);
if (!unittest_data) {
pr_warn("%s: Failed to allocate memory for unittest_data; "
"not running tests\n", __func__);
return -ENOMEM;
}
of_fdt_unflatten_tree(unittest_data, NULL, &unittest_data_node);
if (!unittest_data_node) {
pr_warn("%s: No tree to attach; not running tests\n", __func__);
return -ENODATA;
}
/*
* This lock normally encloses of_overlay_apply() as well as
* of_resolve_phandles().
*/
of_overlay_mutex_lock();
rc = of_resolve_phandles(unittest_data_node);
if (rc) {
pr_err("%s: Failed to resolve phandles (rc=%i)\n", __func__, rc);
of_overlay_mutex_unlock();
return -EINVAL;
}
if (!of_root) {
of_root = unittest_data_node;
for_each_of_allnodes(np)
__of_attach_node_sysfs(np);
of_aliases = of_find_node_by_path("/aliases");
of_chosen = of_find_node_by_path("/chosen");
of_overlay_mutex_unlock();
return 0;
}
/* attach the sub-tree to live tree */
np = unittest_data_node->child;
while (np) {
struct device_node *next = np->sibling;
np->parent = of_root;
attach_node_and_children(np);
np = next;
}
of_overlay_mutex_unlock();
return 0;
}
#ifdef CONFIG_OF_OVERLAY
static int unittest_probe(struct platform_device *pdev)
{
struct device *dev = &pdev->dev;
struct device_node *np = dev->of_node;
if (np == NULL) {
dev_err(dev, "No OF data for device\n");
return -EINVAL;
}
dev_dbg(dev, "%s for node @%pOF\n", __func__, np);
of_platform_populate(np, NULL, NULL, &pdev->dev);
return 0;
}
static int unittest_remove(struct platform_device *pdev)
{
struct device *dev = &pdev->dev;
struct device_node *np = dev->of_node;
dev_dbg(dev, "%s for node @%pOF\n", __func__, np);
return 0;
}
static const struct of_device_id unittest_match[] = {
{ .compatible = "unittest", },
{},
};
static struct platform_driver unittest_driver = {
.probe = unittest_probe,
.remove = unittest_remove,
.driver = {
.name = "unittest",
.of_match_table = of_match_ptr(unittest_match),
},
};
/* get the platform device instantiated at the path */
static struct platform_device *of_path_to_platform_device(const char *path)
{
struct device_node *np;
struct platform_device *pdev;
np = of_find_node_by_path(path);
if (np == NULL)
return NULL;
pdev = of_find_device_by_node(np);
of_node_put(np);
return pdev;
}
/* find out if a platform device exists at that path */
static int of_path_platform_device_exists(const char *path)
{
struct platform_device *pdev;
pdev = of_path_to_platform_device(path);
platform_device_put(pdev);
return pdev != NULL;
}
#if IS_BUILTIN(CONFIG_I2C)
/* get the i2c client device instantiated at the path */
static struct i2c_client *of_path_to_i2c_client(const char *path)
{
struct device_node *np;
struct i2c_client *client;
np = of_find_node_by_path(path);
if (np == NULL)
return NULL;
client = of_find_i2c_device_by_node(np);
of_node_put(np);
return client;
}
/* find out if a i2c client device exists at that path */
static int of_path_i2c_client_exists(const char *path)
{
struct i2c_client *client;
client = of_path_to_i2c_client(path);
if (client)
put_device(&client->dev);
return client != NULL;
}
#else
static int of_path_i2c_client_exists(const char *path)
{
return 0;
}
#endif
enum overlay_type {
PDEV_OVERLAY,
I2C_OVERLAY
};
static int of_path_device_type_exists(const char *path,
enum overlay_type ovtype)
{
switch (ovtype) {
case PDEV_OVERLAY:
return of_path_platform_device_exists(path);
case I2C_OVERLAY:
return of_path_i2c_client_exists(path);
}
return 0;
}
static const char *unittest_path(int nr, enum overlay_type ovtype)
{
const char *base;
static char buf[256];
switch (ovtype) {
case PDEV_OVERLAY:
base = "/testcase-data/overlay-node/test-bus";
break;
case I2C_OVERLAY:
base = "/testcase-data/overlay-node/test-bus/i2c-test-bus";
break;
default:
buf[0] = '\0';
return buf;
}
snprintf(buf, sizeof(buf) - 1, "%s/test-unittest%d", base, nr);
buf[sizeof(buf) - 1] = '\0';
return buf;
}
static int of_unittest_device_exists(int unittest_nr, enum overlay_type ovtype)
{
const char *path;
path = unittest_path(unittest_nr, ovtype);
switch (ovtype) {
case PDEV_OVERLAY:
return of_path_platform_device_exists(path);
case I2C_OVERLAY:
return of_path_i2c_client_exists(path);
}
return 0;
}
static const char *overlay_path(int nr)
{
static char buf[256];
snprintf(buf, sizeof(buf) - 1,
"/testcase-data/overlay%d", nr);
buf[sizeof(buf) - 1] = '\0';
return buf;
}
static const char *bus_path = "/testcase-data/overlay-node/test-bus";
/* it is guaranteed that overlay ids are assigned in sequence */
#define MAX_UNITTEST_OVERLAYS 256
static unsigned long overlay_id_bits[BITS_TO_LONGS(MAX_UNITTEST_OVERLAYS)];
static int overlay_first_id = -1;
static void of_unittest_track_overlay(int id)
{
if (overlay_first_id < 0)
overlay_first_id = id;
id -= overlay_first_id;
/* we shouldn't need that many */
BUG_ON(id >= MAX_UNITTEST_OVERLAYS);
overlay_id_bits[BIT_WORD(id)] |= BIT_MASK(id);
}
static void of_unittest_untrack_overlay(int id)
{
if (overlay_first_id < 0)
return;
id -= overlay_first_id;
BUG_ON(id >= MAX_UNITTEST_OVERLAYS);
overlay_id_bits[BIT_WORD(id)] &= ~BIT_MASK(id);
}
static void of_unittest_destroy_tracked_overlays(void)
{
int id, ret, defers, ovcs_id;
if (overlay_first_id < 0)
return;
/* try until no defers */
do {
defers = 0;
/* remove in reverse order */
for (id = MAX_UNITTEST_OVERLAYS - 1; id >= 0; id--) {
if (!(overlay_id_bits[BIT_WORD(id)] & BIT_MASK(id)))
continue;
ovcs_id = id + overlay_first_id;
ret = of_overlay_remove(&ovcs_id);
if (ret == -ENODEV) {
pr_warn("%s: no overlay to destroy for #%d\n",
__func__, id + overlay_first_id);
continue;
}
if (ret != 0) {
defers++;
pr_warn("%s: overlay destroy failed for #%d\n",
__func__, id + overlay_first_id);
continue;
}
overlay_id_bits[BIT_WORD(id)] &= ~BIT_MASK(id);
}
} while (defers > 0);
}
static int of_unittest_apply_overlay(int overlay_nr, int unittest_nr,
int *overlay_id)
{
struct device_node *np = NULL;
int ret;
np = of_find_node_by_path(overlay_path(overlay_nr));
if (np == NULL) {
unittest(0, "could not find overlay node @\"%s\"\n",
overlay_path(overlay_nr));
ret = -EINVAL;
goto out;
}
*overlay_id = 0;
ret = of_overlay_apply(np, overlay_id);
if (ret < 0) {
unittest(0, "could not create overlay from \"%s\"\n",
overlay_path(overlay_nr));
goto out;
}
of_unittest_track_overlay(*overlay_id);
ret = 0;
out:
of_node_put(np);
return ret;
}
/* apply an overlay while checking before and after states */
static int of_unittest_apply_overlay_check(int overlay_nr, int unittest_nr,
int before, int after, enum overlay_type ovtype)
{
int ret, ovcs_id;
/* unittest device must not be in before state */
if (of_unittest_device_exists(unittest_nr, ovtype) != before) {
unittest(0, "overlay @\"%s\" with device @\"%s\" %s\n",
overlay_path(overlay_nr),
unittest_path(unittest_nr, ovtype),
!before ? "enabled" : "disabled");
return -EINVAL;
}
ovcs_id = 0;
ret = of_unittest_apply_overlay(overlay_nr, unittest_nr, &ovcs_id);
if (ret != 0) {
/* of_unittest_apply_overlay already called unittest() */
return ret;
}
/* unittest device must be to set to after state */
if (of_unittest_device_exists(unittest_nr, ovtype) != after) {
unittest(0, "overlay @\"%s\" failed to create @\"%s\" %s\n",
overlay_path(overlay_nr),
unittest_path(unittest_nr, ovtype),
!after ? "enabled" : "disabled");
return -EINVAL;
}
return 0;
}
/* apply an overlay and then revert it while checking before, after states */
static int of_unittest_apply_revert_overlay_check(int overlay_nr,
int unittest_nr, int before, int after,
enum overlay_type ovtype)
{
int ret, ovcs_id;
/* unittest device must be in before state */
if (of_unittest_device_exists(unittest_nr, ovtype) != before) {
unittest(0, "overlay @\"%s\" with device @\"%s\" %s\n",
overlay_path(overlay_nr),
unittest_path(unittest_nr, ovtype),
!before ? "enabled" : "disabled");
return -EINVAL;
}
/* apply the overlay */
ovcs_id = 0;
ret = of_unittest_apply_overlay(overlay_nr, unittest_nr, &ovcs_id);
if (ret != 0) {
/* of_unittest_apply_overlay already called unittest() */
return ret;
}
/* unittest device must be in after state */
if (of_unittest_device_exists(unittest_nr, ovtype) != after) {
unittest(0, "overlay @\"%s\" failed to create @\"%s\" %s\n",
overlay_path(overlay_nr),
unittest_path(unittest_nr, ovtype),
!after ? "enabled" : "disabled");
return -EINVAL;
}
ret = of_overlay_remove(&ovcs_id);
if (ret != 0) {
unittest(0, "overlay @\"%s\" failed to be destroyed @\"%s\"\n",
overlay_path(overlay_nr),
unittest_path(unittest_nr, ovtype));
return ret;
}
/* unittest device must be again in before state */
if (of_unittest_device_exists(unittest_nr, PDEV_OVERLAY) != before) {
unittest(0, "overlay @\"%s\" with device @\"%s\" %s\n",
overlay_path(overlay_nr),
unittest_path(unittest_nr, ovtype),
!before ? "enabled" : "disabled");
return -EINVAL;
}
return 0;
}
/* test activation of device */
static void of_unittest_overlay_0(void)
{
int ret;
/* device should enable */
ret = of_unittest_apply_overlay_check(0, 0, 0, 1, PDEV_OVERLAY);
if (ret != 0)
return;
unittest(1, "overlay test %d passed\n", 0);
}
/* test deactivation of device */
static void of_unittest_overlay_1(void)
{
int ret;
/* device should disable */
ret = of_unittest_apply_overlay_check(1, 1, 1, 0, PDEV_OVERLAY);
if (ret != 0)
return;
unittest(1, "overlay test %d passed\n", 1);
}
/* test activation of device */
static void of_unittest_overlay_2(void)
{
int ret;
/* device should enable */
ret = of_unittest_apply_overlay_check(2, 2, 0, 1, PDEV_OVERLAY);
if (ret != 0)
return;
unittest(1, "overlay test %d passed\n", 2);
}
/* test deactivation of device */
static void of_unittest_overlay_3(void)
{
int ret;
/* device should disable */
ret = of_unittest_apply_overlay_check(3, 3, 1, 0, PDEV_OVERLAY);
if (ret != 0)
return;
unittest(1, "overlay test %d passed\n", 3);
}
/* test activation of a full device node */
static void of_unittest_overlay_4(void)
{
int ret;
/* device should disable */
ret = of_unittest_apply_overlay_check(4, 4, 0, 1, PDEV_OVERLAY);
if (ret != 0)
return;
unittest(1, "overlay test %d passed\n", 4);
}
/* test overlay apply/revert sequence */
static void of_unittest_overlay_5(void)
{
int ret;
/* device should disable */
ret = of_unittest_apply_revert_overlay_check(5, 5, 0, 1, PDEV_OVERLAY);
if (ret != 0)
return;
unittest(1, "overlay test %d passed\n", 5);
}
/* test overlay application in sequence */
static void of_unittest_overlay_6(void)
{
struct device_node *np;
int ret, i, ov_id[2], ovcs_id;
int overlay_nr = 6, unittest_nr = 6;
int before = 0, after = 1;
/* unittest device must be in before state */
for (i = 0; i < 2; i++) {
if (of_unittest_device_exists(unittest_nr + i, PDEV_OVERLAY)
!= before) {
unittest(0, "overlay @\"%s\" with device @\"%s\" %s\n",
overlay_path(overlay_nr + i),
unittest_path(unittest_nr + i,
PDEV_OVERLAY),
!before ? "enabled" : "disabled");
return;
}
}
/* apply the overlays */
for (i = 0; i < 2; i++) {
np = of_find_node_by_path(overlay_path(overlay_nr + i));
if (np == NULL) {
unittest(0, "could not find overlay node @\"%s\"\n",
overlay_path(overlay_nr + i));
return;
}
ovcs_id = 0;
ret = of_overlay_apply(np, &ovcs_id);
if (ret < 0) {
unittest(0, "could not create overlay from \"%s\"\n",
overlay_path(overlay_nr + i));
return;
}
ov_id[i] = ovcs_id;
of_unittest_track_overlay(ov_id[i]);
}
for (i = 0; i < 2; i++) {
/* unittest device must be in after state */
if (of_unittest_device_exists(unittest_nr + i, PDEV_OVERLAY)
!= after) {
unittest(0, "overlay @\"%s\" failed @\"%s\" %s\n",
overlay_path(overlay_nr + i),
unittest_path(unittest_nr + i,
PDEV_OVERLAY),
!after ? "enabled" : "disabled");
return;
}
}
for (i = 1; i >= 0; i--) {
ovcs_id = ov_id[i];
ret = of_overlay_remove(&ovcs_id);
if (ret != 0) {
unittest(0, "overlay @\"%s\" failed destroy @\"%s\"\n",
overlay_path(overlay_nr + i),
unittest_path(unittest_nr + i,
PDEV_OVERLAY));
return;
}
of_unittest_untrack_overlay(ov_id[i]);
}
for (i = 0; i < 2; i++) {
/* unittest device must be again in before state */
if (of_unittest_device_exists(unittest_nr + i, PDEV_OVERLAY)
!= before) {
unittest(0, "overlay @\"%s\" with device @\"%s\" %s\n",
overlay_path(overlay_nr + i),
unittest_path(unittest_nr + i,
PDEV_OVERLAY),
!before ? "enabled" : "disabled");
return;
}
}
unittest(1, "overlay test %d passed\n", 6);
}
/* test overlay application in sequence */
static void of_unittest_overlay_8(void)
{
struct device_node *np;
int ret, i, ov_id[2], ovcs_id;
int overlay_nr = 8, unittest_nr = 8;
/* we don't care about device state in this test */
/* apply the overlays */
for (i = 0; i < 2; i++) {
np = of_find_node_by_path(overlay_path(overlay_nr + i));
if (np == NULL) {
unittest(0, "could not find overlay node @\"%s\"\n",
overlay_path(overlay_nr + i));
return;
}
ovcs_id = 0;
ret = of_overlay_apply(np, &ovcs_id);
if (ret < 0) {
unittest(0, "could not create overlay from \"%s\"\n",
overlay_path(overlay_nr + i));
return;
}
ov_id[i] = ovcs_id;
of_unittest_track_overlay(ov_id[i]);
}
/* now try to remove first overlay (it should fail) */
ovcs_id = ov_id[0];
ret = of_overlay_remove(&ovcs_id);
if (ret == 0) {
unittest(0, "overlay @\"%s\" was destroyed @\"%s\"\n",
overlay_path(overlay_nr + 0),
unittest_path(unittest_nr,
PDEV_OVERLAY));
return;
}
/* removing them in order should work */
for (i = 1; i >= 0; i--) {
ovcs_id = ov_id[i];
ret = of_overlay_remove(&ovcs_id);
if (ret != 0) {
unittest(0, "overlay @\"%s\" not destroyed @\"%s\"\n",
overlay_path(overlay_nr + i),
unittest_path(unittest_nr,
PDEV_OVERLAY));
return;
}
of_unittest_untrack_overlay(ov_id[i]);
}
unittest(1, "overlay test %d passed\n", 8);
}
/* test insertion of a bus with parent devices */
static void of_unittest_overlay_10(void)
{
int ret;
char *child_path;
/* device should disable */
ret = of_unittest_apply_overlay_check(10, 10, 0, 1, PDEV_OVERLAY);
if (unittest(ret == 0,
"overlay test %d failed; overlay application\n", 10))
return;
child_path = kasprintf(GFP_KERNEL, "%s/test-unittest101",
unittest_path(10, PDEV_OVERLAY));
if (unittest(child_path, "overlay test %d failed; kasprintf\n", 10))
return;
ret = of_path_device_type_exists(child_path, PDEV_OVERLAY);
kfree(child_path);
if (unittest(ret, "overlay test %d failed; no child device\n", 10))
return;
}
/* test insertion of a bus with parent devices (and revert) */
static void of_unittest_overlay_11(void)
{
int ret;
/* device should disable */
ret = of_unittest_apply_revert_overlay_check(11, 11, 0, 1,
PDEV_OVERLAY);
if (unittest(ret == 0,
"overlay test %d failed; overlay application\n", 11))
return;
}
#if IS_BUILTIN(CONFIG_I2C) && IS_ENABLED(CONFIG_OF_OVERLAY)
struct unittest_i2c_bus_data {
struct platform_device *pdev;
struct i2c_adapter adap;
};
static int unittest_i2c_master_xfer(struct i2c_adapter *adap,
struct i2c_msg *msgs, int num)
{
struct unittest_i2c_bus_data *std = i2c_get_adapdata(adap);
(void)std;
return num;
}
static u32 unittest_i2c_functionality(struct i2c_adapter *adap)
{
return I2C_FUNC_I2C | I2C_FUNC_SMBUS_EMUL;
}
static const struct i2c_algorithm unittest_i2c_algo = {
.master_xfer = unittest_i2c_master_xfer,
.functionality = unittest_i2c_functionality,
};
static int unittest_i2c_bus_probe(struct platform_device *pdev)
{
struct device *dev = &pdev->dev;
struct device_node *np = dev->of_node;
struct unittest_i2c_bus_data *std;
struct i2c_adapter *adap;
int ret;
if (np == NULL) {
dev_err(dev, "No OF data for device\n");
return -EINVAL;
}
dev_dbg(dev, "%s for node @%pOF\n", __func__, np);
std = devm_kzalloc(dev, sizeof(*std), GFP_KERNEL);
if (!std) {
dev_err(dev, "Failed to allocate unittest i2c data\n");
return -ENOMEM;
}
/* link them together */
std->pdev = pdev;
platform_set_drvdata(pdev, std);
adap = &std->adap;
i2c_set_adapdata(adap, std);
adap->nr = -1;
strlcpy(adap->name, pdev->name, sizeof(adap->name));
adap->class = I2C_CLASS_DEPRECATED;
adap->algo = &unittest_i2c_algo;
adap->dev.parent = dev;
adap->dev.of_node = dev->of_node;
adap->timeout = 5 * HZ;
adap->retries = 3;
ret = i2c_add_numbered_adapter(adap);
if (ret != 0) {
dev_err(dev, "Failed to add I2C adapter\n");
return ret;
}
return 0;
}
static int unittest_i2c_bus_remove(struct platform_device *pdev)
{
struct device *dev = &pdev->dev;
struct device_node *np = dev->of_node;
struct unittest_i2c_bus_data *std = platform_get_drvdata(pdev);
dev_dbg(dev, "%s for node @%pOF\n", __func__, np);
i2c_del_adapter(&std->adap);
return 0;
}
static const struct of_device_id unittest_i2c_bus_match[] = {
{ .compatible = "unittest-i2c-bus", },
{},
};
static struct platform_driver unittest_i2c_bus_driver = {
.probe = unittest_i2c_bus_probe,
.remove = unittest_i2c_bus_remove,
.driver = {
.name = "unittest-i2c-bus",
.of_match_table = of_match_ptr(unittest_i2c_bus_match),
},
};
static int unittest_i2c_dev_probe(struct i2c_client *client,
const struct i2c_device_id *id)
{
struct device *dev = &client->dev;
struct device_node *np = client->dev.of_node;
if (!np) {
dev_err(dev, "No OF node\n");
return -EINVAL;
}
dev_dbg(dev, "%s for node @%pOF\n", __func__, np);
return 0;
};
static int unittest_i2c_dev_remove(struct i2c_client *client)
{
struct device *dev = &client->dev;
struct device_node *np = client->dev.of_node;
dev_dbg(dev, "%s for node @%pOF\n", __func__, np);
return 0;
}
static const struct i2c_device_id unittest_i2c_dev_id[] = {
{ .name = "unittest-i2c-dev" },
{ }
};
static struct i2c_driver unittest_i2c_dev_driver = {
.driver = {
.name = "unittest-i2c-dev",
},
.probe = unittest_i2c_dev_probe,
.remove = unittest_i2c_dev_remove,
.id_table = unittest_i2c_dev_id,
};
#if IS_BUILTIN(CONFIG_I2C_MUX)
static int unittest_i2c_mux_select_chan(struct i2c_mux_core *muxc, u32 chan)
{
return 0;
}
static int unittest_i2c_mux_probe(struct i2c_client *client,
const struct i2c_device_id *id)
{
int ret, i, nchans;
struct device *dev = &client->dev;
struct i2c_adapter *adap = to_i2c_adapter(dev->parent);
struct device_node *np = client->dev.of_node, *child;
struct i2c_mux_core *muxc;
u32 reg, max_reg;
dev_dbg(dev, "%s for node @%pOF\n", __func__, np);
if (!np) {
dev_err(dev, "No OF node\n");
return -EINVAL;
}
max_reg = (u32)-1;
for_each_child_of_node(np, child) {
ret = of_property_read_u32(child, "reg", &reg);
if (ret)
continue;
if (max_reg == (u32)-1 || reg > max_reg)
max_reg = reg;
}
nchans = max_reg == (u32)-1 ? 0 : max_reg + 1;
if (nchans == 0) {
dev_err(dev, "No channels\n");
return -EINVAL;
}
muxc = i2c_mux_alloc(adap, dev, nchans, 0, 0,
unittest_i2c_mux_select_chan, NULL);
if (!muxc)
return -ENOMEM;
for (i = 0; i < nchans; i++) {
ret = i2c_mux_add_adapter(muxc, 0, i, 0);
if (ret) {
dev_err(dev, "Failed to register mux #%d\n", i);
i2c_mux_del_adapters(muxc);
return -ENODEV;
}
}
i2c_set_clientdata(client, muxc);
return 0;
};
static int unittest_i2c_mux_remove(struct i2c_client *client)
{
struct device *dev = &client->dev;
struct device_node *np = client->dev.of_node;
struct i2c_mux_core *muxc = i2c_get_clientdata(client);
dev_dbg(dev, "%s for node @%pOF\n", __func__, np);
i2c_mux_del_adapters(muxc);
return 0;
}
static const struct i2c_device_id unittest_i2c_mux_id[] = {
{ .name = "unittest-i2c-mux" },
{ }
};
static struct i2c_driver unittest_i2c_mux_driver = {
.driver = {
.name = "unittest-i2c-mux",
},
.probe = unittest_i2c_mux_probe,
.remove = unittest_i2c_mux_remove,
.id_table = unittest_i2c_mux_id,
};
#endif
static int of_unittest_overlay_i2c_init(void)
{
int ret;
ret = i2c_add_driver(&unittest_i2c_dev_driver);
if (unittest(ret == 0,
"could not register unittest i2c device driver\n"))
return ret;
ret = platform_driver_register(&unittest_i2c_bus_driver);
if (unittest(ret == 0,
"could not register unittest i2c bus driver\n"))
return ret;
#if IS_BUILTIN(CONFIG_I2C_MUX)
ret = i2c_add_driver(&unittest_i2c_mux_driver);
if (unittest(ret == 0,
"could not register unittest i2c mux driver\n"))
return ret;
#endif
return 0;
}
static void of_unittest_overlay_i2c_cleanup(void)
{
#if IS_BUILTIN(CONFIG_I2C_MUX)
i2c_del_driver(&unittest_i2c_mux_driver);
#endif
platform_driver_unregister(&unittest_i2c_bus_driver);
i2c_del_driver(&unittest_i2c_dev_driver);
}
static void of_unittest_overlay_i2c_12(void)
{
int ret;
/* device should enable */
ret = of_unittest_apply_overlay_check(12, 12, 0, 1, I2C_OVERLAY);
if (ret != 0)
return;
unittest(1, "overlay test %d passed\n", 12);
}
/* test deactivation of device */
static void of_unittest_overlay_i2c_13(void)
{
int ret;
/* device should disable */
ret = of_unittest_apply_overlay_check(13, 13, 1, 0, I2C_OVERLAY);
if (ret != 0)
return;
unittest(1, "overlay test %d passed\n", 13);
}
/* just check for i2c mux existence */
static void of_unittest_overlay_i2c_14(void)
{
}
static void of_unittest_overlay_i2c_15(void)
{
int ret;
/* device should enable */
ret = of_unittest_apply_overlay_check(15, 15, 0, 1, I2C_OVERLAY);
if (ret != 0)
return;
unittest(1, "overlay test %d passed\n", 15);
}
#else
static inline void of_unittest_overlay_i2c_14(void) { }
static inline void of_unittest_overlay_i2c_15(void) { }
#endif
static void __init of_unittest_overlay(void)
{
struct device_node *bus_np = NULL;
int ret;
ret = platform_driver_register(&unittest_driver);
if (ret != 0) {
unittest(0, "could not register unittest driver\n");
goto out;
}
bus_np = of_find_node_by_path(bus_path);
if (bus_np == NULL) {
unittest(0, "could not find bus_path \"%s\"\n", bus_path);
goto out;
}
ret = of_platform_default_populate(bus_np, NULL, NULL);
if (ret != 0) {
unittest(0, "could not populate bus @ \"%s\"\n", bus_path);
goto out;
}
if (!of_unittest_device_exists(100, PDEV_OVERLAY)) {
unittest(0, "could not find unittest0 @ \"%s\"\n",
unittest_path(100, PDEV_OVERLAY));
goto out;
}
if (of_unittest_device_exists(101, PDEV_OVERLAY)) {
unittest(0, "unittest1 @ \"%s\" should not exist\n",
unittest_path(101, PDEV_OVERLAY));
goto out;
}
unittest(1, "basic infrastructure of overlays passed");
/* tests in sequence */
of_unittest_overlay_0();
of_unittest_overlay_1();
of_unittest_overlay_2();
of_unittest_overlay_3();
of_unittest_overlay_4();
of_unittest_overlay_5();
of_unittest_overlay_6();
of_unittest_overlay_8();
of_unittest_overlay_10();
of_unittest_overlay_11();
#if IS_BUILTIN(CONFIG_I2C)
if (unittest(of_unittest_overlay_i2c_init() == 0, "i2c init failed\n"))
goto out;
of_unittest_overlay_i2c_12();
of_unittest_overlay_i2c_13();
of_unittest_overlay_i2c_14();
of_unittest_overlay_i2c_15();
of_unittest_overlay_i2c_cleanup();
#endif
of_unittest_destroy_tracked_overlays();
out:
of_node_put(bus_np);
}
#else
static inline void __init of_unittest_overlay(void) { }
#endif
#ifdef CONFIG_OF_OVERLAY
/*
* __dtb_ot_begin[] and __dtb_ot_end[] are created by cmd_dt_S_dtb
* in scripts/Makefile.lib
*/
#define OVERLAY_INFO_EXTERN(name) \
extern uint8_t __dtb_##name##_begin[]; \
extern uint8_t __dtb_##name##_end[]
#define OVERLAY_INFO(name, expected) \
{ .dtb_begin = __dtb_##name##_begin, \
.dtb_end = __dtb_##name##_end, \
.expected_result = expected, \
}
struct overlay_info {
uint8_t *dtb_begin;
uint8_t *dtb_end;
void *data;
struct device_node *np_overlay;
int expected_result;
int overlay_id;
};
OVERLAY_INFO_EXTERN(overlay_base);
OVERLAY_INFO_EXTERN(overlay);
OVERLAY_INFO_EXTERN(overlay_bad_phandle);
OVERLAY_INFO_EXTERN(overlay_bad_symbol);
/* order of entries is hard-coded into users of overlays[] */
static struct overlay_info overlays[] = {
OVERLAY_INFO(overlay_base, -9999),
OVERLAY_INFO(overlay, 0),
OVERLAY_INFO(overlay_bad_phandle, -EINVAL),
OVERLAY_INFO(overlay_bad_symbol, -EINVAL),
{}
};
static struct device_node *overlay_base_root;
/*
* Create base device tree for the overlay unittest.
*
* This is called from very early boot code.
*
* Do as much as possible the same way as done in __unflatten_device_tree
* and other early boot steps for the normal FDT so that the overlay base
* unflattened tree will have the same characteristics as the real tree
* (such as having memory allocated by the early allocator). The goal
* is to test "the real thing" as much as possible, and test "test setup
* code" as little as possible.
*
* Have to stop before resolving phandles, because that uses kmalloc.
*/
void __init unittest_unflatten_overlay_base(void)
{
struct overlay_info *info;
u32 data_size;
u32 size;
info = &overlays[0];
if (info->expected_result != -9999) {
pr_err("No dtb 'overlay_base' to attach\n");
return;
}
data_size = info->dtb_end - info->dtb_begin;
if (!data_size) {
pr_err("No dtb 'overlay_base' to attach\n");
return;
}
size = fdt_totalsize(info->dtb_begin);
if (size != data_size) {
pr_err("dtb 'overlay_base' header totalsize != actual size");
return;
}
info->data = early_init_dt_alloc_memory_arch(size,
roundup_pow_of_two(FDT_V17_SIZE));
if (!info->data) {
pr_err("alloc for dtb 'overlay_base' failed");
return;
}
memcpy(info->data, info->dtb_begin, size);
__unflatten_device_tree(info->data, NULL, &info->np_overlay,
early_init_dt_alloc_memory_arch, true);
overlay_base_root = info->np_overlay;
}
/*
* The purpose of of_unittest_overlay_data_add is to add an
* overlay in the normal fashion. This is a test of the whole
* picture, instead of testing individual elements.
*
* A secondary purpose is to be able to verify that the contents of
* /proc/device-tree/ contains the updated structure and values from
* the overlay. That must be verified separately in user space.
*
* Return 0 on unexpected error.
*/
static int __init overlay_data_add(int onum)
{
struct overlay_info *info;
int k;
int ret;
u32 size;
u32 size_from_header;
for (k = 0, info = overlays; info; info++, k++) {
if (k == onum)
break;
}
if (onum > k)
return 0;
size = info->dtb_end - info->dtb_begin;
if (!size) {
pr_err("no overlay to attach, %d\n", onum);
ret = 0;
}
size_from_header = fdt_totalsize(info->dtb_begin);
if (size_from_header != size) {
pr_err("overlay header totalsize != actual size, %d", onum);
return 0;
}
/*
* Must create permanent copy of FDT because of_fdt_unflatten_tree()
* will create pointers to the passed in FDT in the EDT.
*/
info->data = kmemdup(info->dtb_begin, size, GFP_KERNEL);
if (!info->data) {
pr_err("unable to allocate memory for data, %d\n", onum);
return 0;
}
of_fdt_unflatten_tree(info->data, NULL, &info->np_overlay);
if (!info->np_overlay) {
pr_err("unable to unflatten overlay, %d\n", onum);
ret = 0;
goto out_free_data;
}
info->overlay_id = 0;
ret = of_overlay_apply(info->np_overlay, &info->overlay_id);
if (ret < 0) {
pr_err("of_overlay_apply() (ret=%d), %d\n", ret, onum);
goto out_free_np_overlay;
}
pr_debug("__dtb_overlay_begin applied, overlay id %d\n", ret);
goto out;
out_free_np_overlay:
/*
* info->np_overlay is the unflattened device tree
* It has not been spliced into the live tree.
*/
/* todo: function to free unflattened device tree */
out_free_data:
kfree(info->data);
out:
return (ret == info->expected_result);
}
/*
* The purpose of of_unittest_overlay_high_level is to add an overlay
* in the normal fashion. This is a test of the whole picture,
* instead of individual elements.
*
* The first part of the function is _not_ normal overlay usage; it is
* finishing splicing the base overlay device tree into the live tree.
*/
static __init void of_unittest_overlay_high_level(void)
{
struct device_node *last_sibling;
struct device_node *np;
struct device_node *of_symbols;
struct device_node *overlay_base_symbols;
struct device_node **pprev;
struct property *prop;
int ret;
if (!overlay_base_root) {
unittest(0, "overlay_base_root not initialized\n");
return;
}
/*
* Could not fixup phandles in unittest_unflatten_overlay_base()
* because kmalloc() was not yet available.
*/
of_overlay_mutex_lock();
of_resolve_phandles(overlay_base_root);
of_overlay_mutex_unlock();
/*
* do not allow overlay_base to duplicate any node already in
* tree, this greatly simplifies the code
*/
/*
* remove overlay_base_root node "__local_fixups", after
* being used by of_resolve_phandles()
*/
pprev = &overlay_base_root->child;
for (np = overlay_base_root->child; np; np = np->sibling) {
if (!of_node_cmp(np->name, "__local_fixups__")) {
*pprev = np->sibling;
break;
}
pprev = &np->sibling;
}
/* remove overlay_base_root node "__symbols__" if in live tree */
of_symbols = of_get_child_by_name(of_root, "__symbols__");
if (of_symbols) {
/* will have to graft properties from node into live tree */
pprev = &overlay_base_root->child;
for (np = overlay_base_root->child; np; np = np->sibling) {
if (!of_node_cmp(np->name, "__symbols__")) {
overlay_base_symbols = np;
*pprev = np->sibling;
break;
}
pprev = &np->sibling;
}
}
for (np = overlay_base_root->child; np; np = np->sibling) {
if (of_get_child_by_name(of_root, np->name)) {
unittest(0, "illegal node name in overlay_base %s",
np->name);
return;
}
}
/*
* overlay 'overlay_base' is not allowed to have root
* properties, so only need to splice nodes into main device tree.
*
* root node of *overlay_base_root will not be freed, it is lost
* memory.
*/
for (np = overlay_base_root->child; np; np = np->sibling)
np->parent = of_root;
mutex_lock(&of_mutex);
for (last_sibling = np = of_root->child; np; np = np->sibling)
last_sibling = np;
if (last_sibling)
last_sibling->sibling = overlay_base_root->child;
else
of_root->child = overlay_base_root->child;
for_each_of_allnodes_from(overlay_base_root, np)
__of_attach_node_sysfs(np);
if (of_symbols) {
for_each_property_of_node(overlay_base_symbols, prop) {
ret = __of_add_property(of_symbols, prop);
if (ret) {
unittest(0,
"duplicate property '%s' in overlay_base node __symbols__",
prop->name);
goto err_unlock;
}
ret = __of_add_property_sysfs(of_symbols, prop);
if (ret) {
unittest(0,
"unable to add property '%s' in overlay_base node __symbols__ to sysfs",
prop->name);
goto err_unlock;
}
}
}
mutex_unlock(&of_mutex);
/* now do the normal overlay usage test */
unittest(overlay_data_add(1),
"Adding overlay 'overlay' failed\n");
unittest(overlay_data_add(2),
"Adding overlay 'overlay_bad_phandle' failed\n");
unittest(overlay_data_add(3),
"Adding overlay 'overlay_bad_symbol' failed\n");
return;
err_unlock:
mutex_unlock(&of_mutex);
}
#else
static inline __init void of_unittest_overlay_high_level(void) {}
#endif
static int __init of_unittest(void)
{
struct device_node *np;
int res;
/* adding data for unittest */
res = unittest_data_add();
if (res)
return res;
if (!of_aliases)
of_aliases = of_find_node_by_path("/aliases");
np = of_find_node_by_path("/testcase-data/phandle-tests/consumer-a");
if (!np) {
pr_info("No testcase data in device tree; not running tests\n");
return 0;
}
of_node_put(np);
pr_info("start of unittest - you will see error messages\n");
of_unittest_check_tree_linkage();
of_unittest_check_phandles();
of_unittest_find_node_by_name();
of_unittest_dynamic();
of_unittest_parse_phandle_with_args();
of_unittest_printf();
of_unittest_property_string();
of_unittest_property_copy();
of_unittest_changeset();
of_unittest_parse_interrupts();
of_unittest_parse_interrupts_extended();
of_unittest_match_node();
of_unittest_platform_populate();
of_unittest_overlay();
/* Double check linkage after removing testcase data */
of_unittest_check_tree_linkage();
of_unittest_overlay_high_level();
pr_info("end of unittest - %i passed, %i failed\n",
unittest_results.passed, unittest_results.failed);
return 0;
}
late_initcall(of_unittest);
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