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unittest.c
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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/memblock.h>
#include <linux/clk.h>
#include <linux/dma-direct.h> /* to test phys_to_dma/dma_to_phys */
#include <linux/err.h>
#include <linux/errno.h>
#include <linux/hashtable.h>
#include <linux/libfdt.h>
#include <linux/of.h>
#include <linux/of_address.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/kernel.h>
#include <linux/i2c.h>
#include <linux/i2c-mux.h>
#include <linux/gpio/driver.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_info("pass %s():%i\n", __func__, __LINE__); \
} \
failed; \
})
/*
* Expected message may have a message level other than KERN_INFO.
* Print the expected message only if the current loglevel will allow
* the actual message to print.
*
* Do not use EXPECT_BEGIN() or EXPECT_END() for messages generated by
* pr_debug().
*/
#define EXPECT_BEGIN(level, fmt, ...) \
printk(level pr_fmt("EXPECT \\ : ") fmt, ##__VA_ARGS__)
#define EXPECT_END(level, fmt, ...) \
printk(level pr_fmt("EXPECT / : ") fmt, ##__VA_ARGS__)
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 && name && !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 && name && !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 && name && !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 && name && !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 = kcalloc(4, sizeof(*prop), 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) + 1;
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) + 1;
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) + 1;
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) + 1;
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 %pOFn links to wrong parent %pOFn\n",
child, np);
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;
int buf_size;
int size, i;
buf_size = strlen(expected) + 10;
buf = kmalloc(buf_size, GFP_KERNEL);
if (!buf)
return;
/* Baseline; check conversion with a large size limit */
memset(buf, 0xff, buf_size);
size = snprintf(buf, buf_size - 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, buf_size);
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);
}
kfree(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, 0);
of_unittest_printf_one(np, "%pOF", full_name);
of_unittest_printf_one(np, "%pOFf", full_name);
of_unittest_printf_one(np, "%pOFn", "dev");
of_unittest_printf_one(np, "%2pOFn", "dev");
of_unittest_printf_one(np, "%5pOFn", " dev");
of_unittest_printf_one(np, "%pOFnc", "dev:test-sub-device");
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 (!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;
memset(&args, 0, sizeof(args));
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 */
memset(&args, 0, sizeof(args));
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 */
memset(&args, 0, sizeof(args));
EXPECT_BEGIN(KERN_INFO,
"OF: /testcase-data/phandle-tests/consumer-a: could not get #phandle-cells-missing for /testcase-data/phandle-tests/provider1");
rc = of_parse_phandle_with_args(np, "phandle-list",
"#phandle-cells-missing", 0, &args);
EXPECT_END(KERN_INFO,
"OF: /testcase-data/phandle-tests/consumer-a: could not get #phandle-cells-missing for /testcase-data/phandle-tests/provider1");
unittest(rc == -EINVAL, "expected:%i got:%i\n", -EINVAL, rc);
EXPECT_BEGIN(KERN_INFO,
"OF: /testcase-data/phandle-tests/consumer-a: could not get #phandle-cells-missing for /testcase-data/phandle-tests/provider1");
rc = of_count_phandle_with_args(np, "phandle-list",
"#phandle-cells-missing");
EXPECT_END(KERN_INFO,
"OF: /testcase-data/phandle-tests/consumer-a: could not get #phandle-cells-missing for /testcase-data/phandle-tests/provider1");
unittest(rc == -EINVAL, "expected:%i got:%i\n", -EINVAL, rc);
/* Check for bad phandle in list */
memset(&args, 0, sizeof(args));
EXPECT_BEGIN(KERN_INFO,
"OF: /testcase-data/phandle-tests/consumer-a: could not find phandle");
rc = of_parse_phandle_with_args(np, "phandle-list-bad-phandle",
"#phandle-cells", 0, &args);
EXPECT_END(KERN_INFO,
"OF: /testcase-data/phandle-tests/consumer-a: could not find phandle");
unittest(rc == -EINVAL, "expected:%i got:%i\n", -EINVAL, rc);
EXPECT_BEGIN(KERN_INFO,
"OF: /testcase-data/phandle-tests/consumer-a: could not find phandle");
rc = of_count_phandle_with_args(np, "phandle-list-bad-phandle",
"#phandle-cells");
EXPECT_END(KERN_INFO,
"OF: /testcase-data/phandle-tests/consumer-a: could not find phandle");
unittest(rc == -EINVAL, "expected:%i got:%i\n", -EINVAL, rc);
/* Check for incorrectly formed argument list */
memset(&args, 0, sizeof(args));
EXPECT_BEGIN(KERN_INFO,
"OF: /testcase-data/phandle-tests/consumer-a: #phandle-cells = 3 found 1");
rc = of_parse_phandle_with_args(np, "phandle-list-bad-args",
"#phandle-cells", 1, &args);
EXPECT_END(KERN_INFO,
"OF: /testcase-data/phandle-tests/consumer-a: #phandle-cells = 3 found 1");
unittest(rc == -EINVAL, "expected:%i got:%i\n", -EINVAL, rc);
EXPECT_BEGIN(KERN_INFO,
"OF: /testcase-data/phandle-tests/consumer-a: #phandle-cells = 3 found 1");
rc = of_count_phandle_with_args(np, "phandle-list-bad-args",
"#phandle-cells");
EXPECT_END(KERN_INFO,
"OF: /testcase-data/phandle-tests/consumer-a: #phandle-cells = 3 found 1");
unittest(rc == -EINVAL, "expected:%i got:%i\n", -EINVAL, rc);
}
static void __init of_unittest_parse_phandle_with_args_map(void)
{
struct device_node *np, *p0, *p1, *p2, *p3;
struct of_phandle_args args;
int i, rc;
np = of_find_node_by_path("/testcase-data/phandle-tests/consumer-b");
if (!np) {
pr_err("missing testcase data\n");
return;
}
p0 = of_find_node_by_path("/testcase-data/phandle-tests/provider0");
if (!p0) {
pr_err("missing testcase data\n");
return;
}
p1 = of_find_node_by_path("/testcase-data/phandle-tests/provider1");
if (!p1) {
pr_err("missing testcase data\n");
return;
}
p2 = of_find_node_by_path("/testcase-data/phandle-tests/provider2");
if (!p2) {
pr_err("missing testcase data\n");
return;
}
p3 = of_find_node_by_path("/testcase-data/phandle-tests/provider3");
if (!p3) {
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;
memset(&args, 0, sizeof(args));
rc = of_parse_phandle_with_args_map(np, "phandle-list",
"phandle", i, &args);
/* Test the values from tests-phandle.dtsi */
switch (i) {
case 0:
passed &= !rc;
passed &= (args.np == p1);
passed &= (args.args_count == 1);
passed &= (args.args[0] == 1);
break;
case 1:
passed &= !rc;
passed &= (args.np == p3);
passed &= (args.args_count == 3);
passed &= (args.args[0] == 2);
passed &= (args.args[1] == 5);
passed &= (args.args[2] == 3);
break;
case 2:
passed &= (rc == -ENOENT);
break;
case 3:
passed &= !rc;
passed &= (args.np == p0);
passed &= (args.args_count == 0);
break;
case 4:
passed &= !rc;
passed &= (args.np == p1);
passed &= (args.args_count == 1);
passed &= (args.args[0] == 3);
break;
case 5:
passed &= !rc;
passed &= (args.np == p0);
passed &= (args.args_count == 0);
break;
case 6:
passed &= !rc;
passed &= (args.np == p2);
passed &= (args.args_count == 2);
passed &= (args.args[0] == 15);
passed &= (args.args[1] == 0x20);
break;
case 7:
passed &= (rc == -ENOENT);
break;
default:
passed = false;
}
unittest(passed, "index %i - data error on node %s rc=%i\n",
i, args.np->full_name, rc);
}
/* Check for missing list property */
memset(&args, 0, sizeof(args));
rc = of_parse_phandle_with_args_map(np, "phandle-list-missing",
"phandle", 0, &args);
unittest(rc == -ENOENT, "expected:%i got:%i\n", -ENOENT, rc);
/* Check for missing cells,map,mask property */
memset(&args, 0, sizeof(args));
EXPECT_BEGIN(KERN_INFO,
"OF: /testcase-data/phandle-tests/consumer-b: could not get #phandle-missing-cells for /testcase-data/phandle-tests/provider1");
rc = of_parse_phandle_with_args_map(np, "phandle-list",
"phandle-missing", 0, &args);
EXPECT_END(KERN_INFO,
"OF: /testcase-data/phandle-tests/consumer-b: could not get #phandle-missing-cells for /testcase-data/phandle-tests/provider1");
unittest(rc == -EINVAL, "expected:%i got:%i\n", -EINVAL, rc);
/* Check for bad phandle in list */
memset(&args, 0, sizeof(args));
EXPECT_BEGIN(KERN_INFO,
"OF: /testcase-data/phandle-tests/consumer-b: could not find phandle 12345678");
rc = of_parse_phandle_with_args_map(np, "phandle-list-bad-phandle",
"phandle", 0, &args);
EXPECT_END(KERN_INFO,
"OF: /testcase-data/phandle-tests/consumer-b: could not find phandle 12345678");
unittest(rc == -EINVAL, "expected:%i got:%i\n", -EINVAL, rc);
/* Check for incorrectly formed argument list */
memset(&args, 0, sizeof(args));
EXPECT_BEGIN(KERN_INFO,
"OF: /testcase-data/phandle-tests/consumer-b: #phandle-cells = 2 found 1");
rc = of_parse_phandle_with_args_map(np, "phandle-list-bad-args",
"phandle", 1, &args);
EXPECT_END(KERN_INFO,
"OF: /testcase-data/phandle-tests/consumer-b: #phandle-cells = 2 found 1");
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 = 1, .value = "" };
struct property *ppname_n1, pname_n1 = { .name = "name", .length = 3, .value = "n1" };
struct property *ppname_n2, pname_n2 = { .name = "name", .length = 3, .value = "n2" };
struct property *ppname_n21, pname_n21 = { .name = "name", .length = 3, .value = "n21" };
struct property *ppupdate, pupdate = { .name = "prop-update", .length = 5, .value = "abcd" };
struct property *ppremove;
struct device_node *n1, *n2, *n21, *nchangeset, *nremove, *parent, *np;
struct of_changeset chgset;
n1 = __of_node_dup(NULL, "n1");
unittest(n1, "testcase setup failure\n");
n2 = __of_node_dup(NULL, "n2");
unittest(n2, "testcase setup failure\n");
n21 = __of_node_dup(NULL, "n21");
unittest(n21, "testcase setup failure %p\n", n21);
nchangeset = of_find_node_by_path("/testcase-data/changeset");
nremove = of_get_child_by_name(nchangeset, "node-remove");
unittest(nremove, "testcase setup failure\n");
ppadd = __of_prop_dup(&padd, GFP_KERNEL);
unittest(ppadd, "testcase setup failure\n");
ppname_n1 = __of_prop_dup(&pname_n1, GFP_KERNEL);
unittest(ppname_n1, "testcase setup failure\n");
ppname_n2 = __of_prop_dup(&pname_n2, GFP_KERNEL);
unittest(ppname_n2, "testcase setup failure\n");
ppname_n21 = __of_prop_dup(&pname_n21, GFP_KERNEL);
unittest(ppname_n21, "testcase setup failure\n");
ppupdate = __of_prop_dup(&pupdate, GFP_KERNEL);
unittest(ppupdate, "testcase setup failure\n");
parent = nchangeset;
n1->parent = parent;
n2->parent = parent;
n21->parent = n2;
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_add_property(&chgset, n1, ppname_n1), "fail add prop name\n");
unittest(!of_changeset_attach_node(&chgset, n2), "fail attach n2\n");
unittest(!of_changeset_add_property(&chgset, n2, ppname_n2), "fail add prop name\n");
unittest(!of_changeset_detach_node(&chgset, nremove), "fail remove node\n");
unittest(!of_changeset_add_property(&chgset, n21, ppname_n21), "fail add prop name\n");
unittest(!of_changeset_attach_node(&chgset, n21), "fail attach n21\n");
unittest(!of_changeset_add_property(&chgset, parent, ppadd), "fail add prop prop-add\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");
of_node_put(nchangeset);
/* 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);
of_node_put(n1);
of_node_put(n2);
of_node_put(n21);
#endif
}
static void __init of_unittest_dma_get_max_cpu_address(void)
{
struct device_node *np;
phys_addr_t cpu_addr;
if (!IS_ENABLED(CONFIG_OF_ADDRESS))
return;
np = of_find_node_by_path("/testcase-data/address-tests");
if (!np) {
pr_err("missing testcase data\n");
return;
}
cpu_addr = of_dma_get_max_cpu_address(np);
unittest(cpu_addr == 0x4fffffff,
"of_dma_get_max_cpu_address: wrong CPU addr %pad (expecting %x)\n",
&cpu_addr, 0x4fffffff);
}
static void __init of_unittest_dma_ranges_one(const char *path,
u64 expect_dma_addr, u64 expect_paddr)
{
#ifdef CONFIG_HAS_DMA
struct device_node *np;
const struct bus_dma_region *map = NULL;
int rc;
np = of_find_node_by_path(path);
if (!np) {
pr_err("missing testcase data\n");
return;
}
rc = of_dma_get_range(np, &map);
unittest(!rc, "of_dma_get_range failed on node %pOF rc=%i\n", np, rc);
if (!rc) {
phys_addr_t paddr;
dma_addr_t dma_addr;
struct device *dev_bogus;
dev_bogus = kzalloc(sizeof(struct device), GFP_KERNEL);
if (!dev_bogus) {
unittest(0, "kzalloc() failed\n");
kfree(map);
return;
}
dev_bogus->dma_range_map = map;
paddr = dma_to_phys(dev_bogus, expect_dma_addr);
dma_addr = phys_to_dma(dev_bogus, expect_paddr);
unittest(paddr == expect_paddr,
"of_dma_get_range: wrong phys addr %pap (expecting %llx) on node %pOF\n",
&paddr, expect_paddr, np);
unittest(dma_addr == expect_dma_addr,
"of_dma_get_range: wrong DMA addr %pad (expecting %llx) on node %pOF\n",
&dma_addr, expect_dma_addr, np);
kfree(map);
kfree(dev_bogus);
}
of_node_put(np);
#endif
}
static void __init of_unittest_parse_dma_ranges(void)
{
of_unittest_dma_ranges_one("/testcase-data/address-tests/device@70000000",
0x0, 0x20000000);
if (IS_ENABLED(CONFIG_ARCH_DMA_ADDR_T_64BIT))
of_unittest_dma_ranges_one("/testcase-data/address-tests/bus@80000000/device@1000",
0x100000000, 0x20000000);
of_unittest_dma_ranges_one("/testcase-data/address-tests/pci@90000000",
0x80000000, 0x20000000);
}
static void __init of_unittest_pci_dma_ranges(void)
{
struct device_node *np;
struct of_pci_range range;
struct of_pci_range_parser parser;
int i = 0;
if (!IS_ENABLED(CONFIG_PCI))
return;
np = of_find_node_by_path("/testcase-data/address-tests/pci@90000000");
if (!np) {
pr_err("missing testcase data\n");
return;
}
if (of_pci_dma_range_parser_init(&parser, np)) {
pr_err("missing dma-ranges property\n");
return;
}
/*
* Get the dma-ranges from the device tree
*/
for_each_of_pci_range(&parser, &range) {
if (!i) {
unittest(range.size == 0x10000000,
"for_each_of_pci_range wrong size on node %pOF size=%llx\n",
np, range.size);
unittest(range.cpu_addr == 0x20000000,
"for_each_of_pci_range wrong CPU addr (%llx) on node %pOF",
range.cpu_addr, np);
unittest(range.pci_addr == 0x80000000,
"for_each_of_pci_range wrong DMA addr (%llx) on node %pOF",
range.pci_addr, np);
} else {
unittest(range.size == 0x10000000,
"for_each_of_pci_range wrong size on node %pOF size=%llx\n",
np, range.size);
unittest(range.cpu_addr == 0x40000000,
"for_each_of_pci_range wrong CPU addr (%llx) on node %pOF",
range.cpu_addr, np);
unittest(range.pci_addr == 0xc0000000,
"for_each_of_pci_range wrong DMA addr (%llx) on node %pOF",
range.pci_addr, np);
}
i++;
}