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linux/drivers/of/unittest.c
Frank Rowand 74df14cd30 of: unittest: add node lifecycle tests 
Add tests to exercise the actions that occur when the reference count
of devicetree nodes decrement to zero and beyond.  Decrementing to
zero triggers freeing memory allocated for the node.

This commit will expose a pr_err() issue in of_node_release(), resulting
in some kernal warnings and stack traces.

When scripts/dtc/of_unittest_expect processes the console messages,
it will also report related problems for EXPECT messages due to the
pr_err() issue:
   **     missing EXPECT begin      :    5

Signed-off-by: Frank Rowand <frowand.list@gmail.com>
Link: https://lore.kernel.org/r/20230213185702.395776-5-frowand.list@gmail.com
[robh: Fix !CONFIG_OF_DYNAMIC build]
Signed-off-by: Rob Herring <robh@kernel.org>
2023-02-20 15:36:51 -06:00

3663 lines
104 KiB
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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(), EXPECT_END(), EXPECT_NOT_BEGIN(), or
* EXPECT_NOT_END() to report messages expected to be reported or not
* reported 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__)
#define EXPECT_NOT_BEGIN(level, fmt, ...) \
printk(level pr_fmt("EXPECT_NOT \\ : ") fmt, ##__VA_ARGS__)
#define EXPECT_NOT_END(level, fmt, ...) \
printk(level pr_fmt("EXPECT_NOT / : ") 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 && !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 = 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");
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");
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++;
}
of_node_put(np);
}
static void __init of_unittest_parse_interrupts(void)
{
struct device_node *np;
struct of_phandle_args args;
int i, rc;
if (of_irq_workarounds & OF_IMAP_OLDWORLD_MAC)
return;
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;
memset(&args, 0, sizeof(args));
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;
memset(&args, 0, sizeof(args));
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;
if (of_irq_workarounds & OF_IMAP_OLDWORLD_MAC)
return;
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;
memset(&args, 0, sizeof(args));
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:
/*
* Tests child node that is missing property
* #address-cells. See the comments in
* drivers/of/unittest-data/tests-interrupts.dtsi
* nodes intmap1 and interrupts-extended0
*/
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 = DEFINE_RES_MEM(0xfffffff8, 2);
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");
if (!(of_irq_workarounds & OF_IMAP_OLDWORLD_MAC)) {
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");
EXPECT_BEGIN(KERN_INFO,
"platform testcase-data:testcase-device2: error -ENXIO: IRQ index 0 not found");
irq = platform_get_irq(pdev, 0);
EXPECT_END(KERN_INFO,
"platform testcase-data:testcase-device2: error -ENXIO: IRQ index 0 not found");
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) {
of_node_put(np);
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) {
pdev = of_find_device_by_node(grandchild);
unittest(pdev,
"Could not create device for node '%pOFn'\n",
grandchild);
platform_device_put(pdev);
}
}
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 '%pOFn'\n",
grandchild);
}
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 whose properties are being added to the 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 property *save_next;
struct device_node *child;
int ret;
for_each_child_of_node(np, child)
child->parent = dup;
/*
* "unittest internal error: unable to add testdata property"
*
* If this message reports a property in node '/__symbols__' then
* the respective unittest overlay contains a label that has the
* same name as a label in the live devicetree. The label will
* be in the live devicetree only if the devicetree source was
* compiled with the '-@' option. If you encounter this error,
* please consider renaming __all__ of the labels in the unittest
* overlay dts files with an odd prefix that is unlikely to be
* used in a real devicetree.
*/
/*
* open code for_each_property_of_node() because of_add_property()
* sets prop->next to NULL
*/
for (prop = np->properties; prop != NULL; prop = save_next) {
save_next = prop->next;
ret = of_add_property(dup, prop);
if (ret) {
if (ret == -EEXIST && !strcmp(prop->name, "name"))
continue;
pr_err("unittest internal error: unable to add testdata property %pOF/%s",
np, prop->name);
}
}
}
/**
* attach_node_and_children - attaches nodes
* and its children to live tree.
* CAUTION: misleading function name - if node @np already exists in
* the live tree then children of @np are *not* attached to the live
* tree. This works for the current test devicetree nodes because such
* nodes do not have child nodes.
*
* @np: Node to attach to live tree
*/
static void 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);
if (!strcmp(full_name, "/__local_fixups__") ||
!strcmp(full_name, "/__fixups__")) {
kfree(full_name);
return;
}
dup = of_find_node_by_path(full_name);
kfree(full_name);
if (dup) {
update_node_properties(np, dup);
return;
}
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;
}
}
/**
* 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;
void *unittest_data_align;
struct device_node *unittest_data_node = NULL, *np;
/*
* __dtbo_testcases_begin[] and __dtbo_testcases_end[] are magically
* created by cmd_dt_S_dtbo in scripts/Makefile.lib
*/
extern uint8_t __dtbo_testcases_begin[];
extern uint8_t __dtbo_testcases_end[];
const int size = __dtbo_testcases_end - __dtbo_testcases_begin;
int rc;
void *ret;
if (!size) {
pr_warn("%s: testcases is empty\n", __func__);
return -ENODATA;
}
/* creating copy */
unittest_data = kmalloc(size + FDT_ALIGN_SIZE, GFP_KERNEL);
if (!unittest_data)
return -ENOMEM;
unittest_data_align = PTR_ALIGN(unittest_data, FDT_ALIGN_SIZE);
memcpy(unittest_data_align, __dtbo_testcases_begin, size);
ret = of_fdt_unflatten_tree(unittest_data_align, NULL, &unittest_data_node);
if (!ret) {
pr_warn("%s: unflatten testcases tree failed\n", __func__);
kfree(unittest_data);
return -ENODATA;
}
if (!unittest_data_node) {
pr_warn("%s: testcases tree is empty\n", __func__);
kfree(unittest_data);
return -ENODATA;
}
/*
* This lock normally encloses 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;
}
EXPECT_BEGIN(KERN_INFO,
"Duplicate name in testcase-data, renamed to \"duplicate-name#1\"");
/* attach the sub-tree to live tree */
np = unittest_data_node->child;
while (np) {
struct device_node *next = np->sibling;
np->parent = of_root;
/* this will clear OF_DETACHED in np and children */
attach_node_and_children(np);
np = next;
}
EXPECT_END(KERN_INFO,
"Duplicate name in testcase-data, renamed to \"duplicate-name#1\"");
of_overlay_mutex_unlock();
return 0;
}
#ifdef CONFIG_OF_OVERLAY
static int __init overlay_data_apply(const char *overlay_name, int *ovcs_id);
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;
}
#ifdef CONFIG_OF_GPIO
struct unittest_gpio_dev {
struct gpio_chip chip;
};
static int unittest_gpio_chip_request_count;
static int unittest_gpio_probe_count;
static int unittest_gpio_probe_pass_count;
static int unittest_gpio_chip_request(struct gpio_chip *chip, unsigned int offset)
{
unittest_gpio_chip_request_count++;
pr_debug("%s(): %s %d %d\n", __func__, chip->label, offset,
unittest_gpio_chip_request_count);
return 0;
}
static int unittest_gpio_probe(struct platform_device *pdev)
{
struct unittest_gpio_dev *devptr;
int ret;
unittest_gpio_probe_count++;
devptr = kzalloc(sizeof(*devptr), GFP_KERNEL);
if (!devptr)
return -ENOMEM;
platform_set_drvdata(pdev, devptr);
devptr->chip.fwnode = dev_fwnode(&pdev->dev);
devptr->chip.label = "of-unittest-gpio";
devptr->chip.base = -1; /* dynamic allocation */
devptr->chip.ngpio = 5;
devptr->chip.request = unittest_gpio_chip_request;
ret = gpiochip_add_data(&devptr->chip, NULL);
unittest(!ret,
"gpiochip_add_data() for node @%pfw failed, ret = %d\n", devptr->chip.fwnode, ret);
if (!ret)
unittest_gpio_probe_pass_count++;
return ret;
}
static int unittest_gpio_remove(struct platform_device *pdev)
{
struct unittest_gpio_dev *devptr = platform_get_drvdata(pdev);
struct device *dev = &pdev->dev;
dev_dbg(dev, "%s for node @%pfw\n", __func__, devptr->chip.fwnode);
if (!devptr)
return -EINVAL;
if (devptr->chip.base != -1)
gpiochip_remove(&devptr->chip);
platform_set_drvdata(pdev, NULL);
kfree(devptr);
return 0;
}
static const struct of_device_id unittest_gpio_id[] = {
{ .compatible = "unittest-gpio", },
{}
};
static struct platform_driver unittest_gpio_driver = {
.probe = unittest_gpio_probe,
.remove = unittest_gpio_remove,
.driver = {
.name = "unittest-gpio",
.of_match_table = of_match_ptr(unittest_gpio_id),
},
};
static void __init of_unittest_overlay_gpio(void)
{
int chip_request_count;
int probe_pass_count;
int ret;
/*
* tests: apply overlays before registering driver
* Similar to installing a driver as a module, the
* driver is registered after applying the overlays.
*
* The overlays are applied by overlay_data_apply()
* instead of of_unittest_apply_overlay() so that they
* will not be tracked. Thus they will not be removed
* by of_unittest_remove_tracked_overlays().
*
* - apply overlay_gpio_01
* - apply overlay_gpio_02a
* - apply overlay_gpio_02b
* - register driver
*
* register driver will result in
* - probe and processing gpio hog for overlay_gpio_01
* - probe for overlay_gpio_02a
* - processing gpio for overlay_gpio_02b
*/
probe_pass_count = unittest_gpio_probe_pass_count;
chip_request_count = unittest_gpio_chip_request_count;
/*
* overlay_gpio_01 contains gpio node and child gpio hog node
* overlay_gpio_02a contains gpio node
* overlay_gpio_02b contains child gpio hog node
*/
unittest(overlay_data_apply("overlay_gpio_01", NULL),
"Adding overlay 'overlay_gpio_01' failed\n");
unittest(overlay_data_apply("overlay_gpio_02a", NULL),
"Adding overlay 'overlay_gpio_02a' failed\n");
unittest(overlay_data_apply("overlay_gpio_02b", NULL),
"Adding overlay 'overlay_gpio_02b' failed\n");
/*
* messages are the result of the probes, after the
* driver is registered
*/
EXPECT_BEGIN(KERN_INFO,
"gpio-<<int>> (line-B-input): hogged as input\n");
EXPECT_BEGIN(KERN_INFO,
"gpio-<<int>> (line-A-input): hogged as input\n");
ret = platform_driver_register(&unittest_gpio_driver);
if (unittest(ret == 0, "could not register unittest gpio driver\n"))
return;
EXPECT_END(KERN_INFO,
"gpio-<<int>> (line-A-input): hogged as input\n");
EXPECT_END(KERN_INFO,
"gpio-<<int>> (line-B-input): hogged as input\n");
unittest(probe_pass_count + 2 == unittest_gpio_probe_pass_count,
"unittest_gpio_probe() failed or not called\n");
unittest(chip_request_count + 2 == unittest_gpio_chip_request_count,
"unittest_gpio_chip_request() called %d times (expected 1 time)\n",
unittest_gpio_chip_request_count - chip_request_count);
/*
* tests: apply overlays after registering driver
*
* Similar to a driver built-in to the kernel, the
* driver is registered before applying the overlays.
*
* overlay_gpio_03 contains gpio node and child gpio hog node
*
* - apply overlay_gpio_03
*
* apply overlay will result in
* - probe and processing gpio hog.
*/
probe_pass_count = unittest_gpio_probe_pass_count;
chip_request_count = unittest_gpio_chip_request_count;
EXPECT_BEGIN(KERN_INFO,
"gpio-<<int>> (line-D-input): hogged as input\n");
/* overlay_gpio_03 contains gpio node and child gpio hog node */
unittest(overlay_data_apply("overlay_gpio_03", NULL),
"Adding overlay 'overlay_gpio_03' failed\n");
EXPECT_END(KERN_INFO,
"gpio-<<int>> (line-D-input): hogged as input\n");
unittest(probe_pass_count + 1 == unittest_gpio_probe_pass_count,
"unittest_gpio_probe() failed or not called\n");
unittest(chip_request_count + 1 == unittest_gpio_chip_request_count,
"unittest_gpio_chip_request() called %d times (expected 1 time)\n",
unittest_gpio_chip_request_count - chip_request_count);
/*
* overlay_gpio_04a contains gpio node
*
* - apply overlay_gpio_04a
*
* apply the overlay will result in
* - probe for overlay_gpio_04a
*/
probe_pass_count = unittest_gpio_probe_pass_count;
chip_request_count = unittest_gpio_chip_request_count;
/* overlay_gpio_04a contains gpio node */
unittest(overlay_data_apply("overlay_gpio_04a", NULL),
"Adding overlay 'overlay_gpio_04a' failed\n");
unittest(probe_pass_count + 1 == unittest_gpio_probe_pass_count,
"unittest_gpio_probe() failed or not called\n");
/*
* overlay_gpio_04b contains child gpio hog node
*
* - apply overlay_gpio_04b
*
* apply the overlay will result in
* - processing gpio for overlay_gpio_04b
*/
EXPECT_BEGIN(KERN_INFO,
"gpio-<<int>> (line-C-input): hogged as input\n");
/* overlay_gpio_04b contains child gpio hog node */
unittest(overlay_data_apply("overlay_gpio_04b", NULL),
"Adding overlay 'overlay_gpio_04b' failed\n");
EXPECT_END(KERN_INFO,
"gpio-<<int>> (line-C-input): hogged as input\n");
unittest(chip_request_count + 1 == unittest_gpio_chip_request_count,
"unittest_gpio_chip_request() called %d times (expected 1 time)\n",
unittest_gpio_chip_request_count - chip_request_count);
}
#else
static void __init of_unittest_overlay_gpio(void)
{
/* skip tests */
}
#endif
#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_name_from_nr(int nr)
{
static char buf[256];
snprintf(buf, sizeof(buf) - 1,
"overlay_%d", nr);
buf[sizeof(buf) - 1] = '\0';
return buf;
}
static const char *bus_path = "/testcase-data/overlay-node/test-bus";
#define MAX_TRACK_OVCS_IDS 256
static int track_ovcs_id[MAX_TRACK_OVCS_IDS];
static int track_ovcs_id_overlay_nr[MAX_TRACK_OVCS_IDS];
static int track_ovcs_id_cnt;
static void of_unittest_track_overlay(int ovcs_id, int overlay_nr)
{
if (WARN_ON(track_ovcs_id_cnt >= MAX_TRACK_OVCS_IDS))
return;
track_ovcs_id[track_ovcs_id_cnt] = ovcs_id;
track_ovcs_id_overlay_nr[track_ovcs_id_cnt] = overlay_nr;
track_ovcs_id_cnt++;
}
static void of_unittest_untrack_overlay(int ovcs_id)
{
if (WARN_ON(track_ovcs_id_cnt < 1))
return;
track_ovcs_id_cnt--;
/* If out of synch then test is broken. Do not try to recover. */
WARN_ON(track_ovcs_id[track_ovcs_id_cnt] != ovcs_id);
}
static void of_unittest_remove_tracked_overlays(void)
{
int ret, ovcs_id, overlay_nr, save_ovcs_id;
const char *overlay_name;
while (track_ovcs_id_cnt > 0) {
ovcs_id = track_ovcs_id[track_ovcs_id_cnt - 1];
overlay_nr = track_ovcs_id_overlay_nr[track_ovcs_id_cnt - 1];
save_ovcs_id = ovcs_id;
ret = of_overlay_remove(&ovcs_id);
if (ret == -ENODEV) {
overlay_name = overlay_name_from_nr(overlay_nr);
pr_warn("%s: of_overlay_remove() for overlay \"%s\" failed, ret = %d\n",
__func__, overlay_name, ret);
}
of_unittest_untrack_overlay(save_ovcs_id);
}
}
static int __init of_unittest_apply_overlay(int overlay_nr, int *ovcs_id)
{
/*
* The overlay will be tracked, thus it will be removed
* by of_unittest_remove_tracked_overlays().
*/
const char *overlay_name;
overlay_name = overlay_name_from_nr(overlay_nr);
if (!overlay_data_apply(overlay_name, ovcs_id)) {
unittest(0, "could not apply overlay \"%s\"\n", overlay_name);
return -EFAULT;
}
of_unittest_track_overlay(*ovcs_id, overlay_nr);
return 0;
}
/* apply an overlay while checking before and after states */
static int __init 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, "%s with device @\"%s\" %s\n",
overlay_name_from_nr(overlay_nr),
unittest_path(unittest_nr, ovtype),
!before ? "enabled" : "disabled");
return -EINVAL;
}
ovcs_id = 0;
ret = of_unittest_apply_overlay(overlay_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, "%s failed to create @\"%s\" %s\n",
overlay_name_from_nr(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 __init of_unittest_apply_revert_overlay_check(int overlay_nr,
int unittest_nr, int before, int after,
enum overlay_type ovtype)
{
int ret, ovcs_id, save_ovcs_id;
/* unittest device must be in before state */
if (of_unittest_device_exists(unittest_nr, ovtype) != before) {
unittest(0, "%s with device @\"%s\" %s\n",
overlay_name_from_nr(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, &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, "%s failed to create @\"%s\" %s\n",
overlay_name_from_nr(overlay_nr),
unittest_path(unittest_nr, ovtype),
!after ? "enabled" : "disabled");
return -EINVAL;
}
save_ovcs_id = ovcs_id;
ret = of_overlay_remove(&ovcs_id);
if (ret != 0) {
unittest(0, "%s failed to be destroyed @\"%s\"\n",
overlay_name_from_nr(overlay_nr),
unittest_path(unittest_nr, ovtype));
return ret;
}
of_unittest_untrack_overlay(save_ovcs_id);
/* unittest device must be again in before state */
if (of_unittest_device_exists(unittest_nr, PDEV_OVERLAY) != before) {
unittest(0, "%s with device @\"%s\" %s\n",
overlay_name_from_nr(overlay_nr),
unittest_path(unittest_nr, ovtype),
!before ? "enabled" : "disabled");
return -EINVAL;
}
return 0;
}
/* test activation of device */
static void __init of_unittest_overlay_0(void)
{
int ret;
EXPECT_BEGIN(KERN_INFO,
"OF: overlay: WARNING: memory leak will occur if overlay removed, property: /testcase-data/overlay-node/test-bus/test-unittest0/status");
/* device should enable */
ret = of_unittest_apply_overlay_check(0, 0, 0, 1, PDEV_OVERLAY);
EXPECT_END(KERN_INFO,
"OF: overlay: WARNING: memory leak will occur if overlay removed, property: /testcase-data/overlay-node/test-bus/test-unittest0/status");
if (ret)
return;
unittest(1, "overlay test %d passed\n", 0);
}
/* test deactivation of device */
static void __init of_unittest_overlay_1(void)
{
int ret;
EXPECT_BEGIN(KERN_INFO,
"OF: overlay: WARNING: memory leak will occur if overlay removed, property: /testcase-data/overlay-node/test-bus/test-unittest1/status");
/* device should disable */
ret = of_unittest_apply_overlay_check(1, 1, 1, 0, PDEV_OVERLAY);
EXPECT_END(KERN_INFO,
"OF: overlay: WARNING: memory leak will occur if overlay removed, property: /testcase-data/overlay-node/test-bus/test-unittest1/status");
if (ret)
return;
unittest(1, "overlay test %d passed\n", 1);
}
/* test activation of device */
static void __init of_unittest_overlay_2(void)
{
int ret;
EXPECT_BEGIN(KERN_INFO,
"OF: overlay: WARNING: memory leak will occur if overlay removed, property: /testcase-data/overlay-node/test-bus/test-unittest2/status");
/* device should enable */
ret = of_unittest_apply_overlay_check(2, 2, 0, 1, PDEV_OVERLAY);
EXPECT_END(KERN_INFO,
"OF: overlay: WARNING: memory leak will occur if overlay removed, property: /testcase-data/overlay-node/test-bus/test-unittest2/status");
if (ret)
return;
unittest(1, "overlay test %d passed\n", 2);
}
/* test deactivation of device */
static void __init of_unittest_overlay_3(void)
{
int ret;
EXPECT_BEGIN(KERN_INFO,
"OF: overlay: WARNING: memory leak will occur if overlay removed, property: /testcase-data/overlay-node/test-bus/test-unittest3/status");
/* device should disable */
ret = of_unittest_apply_overlay_check(3, 3, 1, 0, PDEV_OVERLAY);
EXPECT_END(KERN_INFO,
"OF: overlay: WARNING: memory leak will occur if overlay removed, property: /testcase-data/overlay-node/test-bus/test-unittest3/status");
if (ret)
return;
unittest(1, "overlay test %d passed\n", 3);
}
/* test activation of a full device node */
static void __init of_unittest_overlay_4(void)
{
/* device should disable */
if (of_unittest_apply_overlay_check(4, 4, 0, 1, PDEV_OVERLAY))
return;
unittest(1, "overlay test %d passed\n", 4);
}
/* test overlay apply/revert sequence */
static void __init of_unittest_overlay_5(void)
{
int ret;
EXPECT_BEGIN(KERN_INFO,
"OF: overlay: WARNING: memory leak will occur if overlay removed, property: /testcase-data/overlay-node/test-bus/test-unittest5/status");
/* device should disable */
ret = of_unittest_apply_revert_overlay_check(5, 5, 0, 1, PDEV_OVERLAY);
EXPECT_END(KERN_INFO,
"OF: overlay: WARNING: memory leak will occur if overlay removed, property: /testcase-data/overlay-node/test-bus/test-unittest5/status");
if (ret)
return;
unittest(1, "overlay test %d passed\n", 5);
}
/* test overlay application in sequence */
static void __init of_unittest_overlay_6(void)
{
int i, save_ovcs_id[2], ovcs_id;
int overlay_nr = 6, unittest_nr = 6;
int before = 0, after = 1;
const char *overlay_name;
int ret;
/* 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, "%s with device @\"%s\" %s\n",
overlay_name_from_nr(overlay_nr + i),
unittest_path(unittest_nr + i,
PDEV_OVERLAY),
!before ? "enabled" : "disabled");
return;
}
}
/* apply the overlays */
EXPECT_BEGIN(KERN_INFO,
"OF: overlay: WARNING: memory leak will occur if overlay removed, property: /testcase-data/overlay-node/test-bus/test-unittest6/status");
overlay_name = overlay_name_from_nr(overlay_nr + 0);
ret = overlay_data_apply(overlay_name, &ovcs_id);
if (!ret) {
unittest(0, "could not apply overlay \"%s\"\n", overlay_name);
return;
}
save_ovcs_id[0] = ovcs_id;
of_unittest_track_overlay(ovcs_id, overlay_nr + 0);
EXPECT_END(KERN_INFO,
"OF: overlay: WARNING: memory leak will occur if overlay removed, property: /testcase-data/overlay-node/test-bus/test-unittest6/status");
EXPECT_BEGIN(KERN_INFO,
"OF: overlay: WARNING: memory leak will occur if overlay removed, property: /testcase-data/overlay-node/test-bus/test-unittest7/status");
overlay_name = overlay_name_from_nr(overlay_nr + 1);
ret = overlay_data_apply(overlay_name, &ovcs_id);
if (!ret) {
unittest(0, "could not apply overlay \"%s\"\n", overlay_name);
return;
}
save_ovcs_id[1] = ovcs_id;
of_unittest_track_overlay(ovcs_id, overlay_nr + 1);
EXPECT_END(KERN_INFO,
"OF: overlay: WARNING: memory leak will occur if overlay removed, property: /testcase-data/overlay-node/test-bus/test-unittest7/status");
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_name_from_nr(overlay_nr + i),
unittest_path(unittest_nr + i,
PDEV_OVERLAY),
!after ? "enabled" : "disabled");
return;
}
}
for (i = 1; i >= 0; i--) {
ovcs_id = save_ovcs_id[i];
if (of_overlay_remove(&ovcs_id)) {
unittest(0, "%s failed destroy @\"%s\"\n",
overlay_name_from_nr(overlay_nr + i),
unittest_path(unittest_nr + i,
PDEV_OVERLAY));
return;
}
of_unittest_untrack_overlay(save_ovcs_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, "%s with device @\"%s\" %s\n",
overlay_name_from_nr(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 __init of_unittest_overlay_8(void)
{
int i, save_ovcs_id[2], ovcs_id;
int overlay_nr = 8, unittest_nr = 8;
const char *overlay_name;
int ret;
/* we don't care about device state in this test */
EXPECT_BEGIN(KERN_INFO,
"OF: overlay: WARNING: memory leak will occur if overlay removed, property: /testcase-data/overlay-node/test-bus/test-unittest8/status");
overlay_name = overlay_name_from_nr(overlay_nr + 0);
ret = overlay_data_apply(overlay_name, &ovcs_id);
if (!ret)
unittest(0, "could not apply overlay \"%s\"\n", overlay_name);
EXPECT_END(KERN_INFO,
"OF: overlay: WARNING: memory leak will occur if overlay removed, property: /testcase-data/overlay-node/test-bus/test-unittest8/status");
if (!ret)
return;
save_ovcs_id[0] = ovcs_id;
of_unittest_track_overlay(ovcs_id, overlay_nr + 0);
overlay_name = overlay_name_from_nr(overlay_nr + 1);
EXPECT_BEGIN(KERN_INFO,
"OF: overlay: WARNING: memory leak will occur if overlay removed, property: /testcase-data/overlay-node/test-bus/test-unittest8/property-foo");
/* apply the overlays */
ret = overlay_data_apply(overlay_name, &ovcs_id);
EXPECT_END(KERN_INFO,
"OF: overlay: WARNING: memory leak will occur if overlay removed, property: /testcase-data/overlay-node/test-bus/test-unittest8/property-foo");
if (!ret) {
unittest(0, "could not apply overlay \"%s\"\n", overlay_name);
return;
}
save_ovcs_id[1] = ovcs_id;
of_unittest_track_overlay(ovcs_id, overlay_nr + 1);
/* now try to remove first overlay (it should fail) */
ovcs_id = save_ovcs_id[0];
EXPECT_BEGIN(KERN_INFO,
"OF: overlay: node_overlaps_later_cs: #6 overlaps with #7 @/testcase-data/overlay-node/test-bus/test-unittest8");
EXPECT_BEGIN(KERN_INFO,
"OF: overlay: overlay #6 is not topmost");
ret = of_overlay_remove(&ovcs_id);
EXPECT_END(KERN_INFO,
"OF: overlay: overlay #6 is not topmost");
EXPECT_END(KERN_INFO,
"OF: overlay: node_overlaps_later_cs: #6 overlaps with #7 @/testcase-data/overlay-node/test-bus/test-unittest8");
if (!ret) {
/*
* Should never get here. If we do, expect a lot of
* subsequent tracking and overlay removal related errors.
*/
unittest(0, "%s was destroyed @\"%s\"\n",
overlay_name_from_nr(overlay_nr + 0),
unittest_path(unittest_nr,
PDEV_OVERLAY));
return;
}
/* removing them in order should work */
for (i = 1; i >= 0; i--) {
ovcs_id = save_ovcs_id[i];
if (of_overlay_remove(&ovcs_id)) {
unittest(0, "%s not destroyed @\"%s\"\n",
overlay_name_from_nr(overlay_nr + i),
unittest_path(unittest_nr,
PDEV_OVERLAY));
return;
}
of_unittest_untrack_overlay(save_ovcs_id[i]);
}
unittest(1, "overlay test %d passed\n", 8);
}
/* test insertion of a bus with parent devices */
static void __init 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);
unittest(ret, "overlay test %d failed; no child device\n", 10);
}
/* test insertion of a bus with parent devices (and revert) */
static void __init of_unittest_overlay_11(void)
{
int ret;
/* device should disable */
ret = of_unittest_apply_revert_overlay_check(11, 11, 0, 1,
PDEV_OVERLAY);
unittest(ret == 0, "overlay test %d failed; overlay apply\n", 11);
}
#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)
return -ENOMEM;
/* link them together */
std->pdev = pdev;
platform_set_drvdata(pdev, std);
adap = &std->adap;
i2c_set_adapdata(adap, std);
adap->nr = -1;
strscpy(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)
{
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 void 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);
}
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_new = 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)
{
int i, nchans;
struct device *dev = &client->dev;
struct i2c_adapter *adap = client->adapter;
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) {
if (of_property_read_u32(child, "reg", &reg))
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++) {
if (i2c_mux_add_adapter(muxc, 0, i, 0)) {
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 void 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);
}
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_new = 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)
EXPECT_BEGIN(KERN_INFO,
"i2c i2c-1: Added multiplexed i2c bus 2");
ret = i2c_add_driver(&unittest_i2c_mux_driver);
EXPECT_END(KERN_INFO,
"i2c i2c-1: Added multiplexed i2c bus 2");
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 __init of_unittest_overlay_i2c_12(void)
{
int ret;
/* device should enable */
EXPECT_BEGIN(KERN_INFO,
"OF: overlay: WARNING: memory leak will occur if overlay removed, property: /testcase-data/overlay-node/test-bus/i2c-test-bus/test-unittest12/status");
ret = of_unittest_apply_overlay_check(12, 12, 0, 1, I2C_OVERLAY);
EXPECT_END(KERN_INFO,
"OF: overlay: WARNING: memory leak will occur if overlay removed, property: /testcase-data/overlay-node/test-bus/i2c-test-bus/test-unittest12/status");
if (ret)
return;
unittest(1, "overlay test %d passed\n", 12);
}
/* test deactivation of device */
static void __init of_unittest_overlay_i2c_13(void)
{
int ret;
EXPECT_BEGIN(KERN_INFO,
"OF: overlay: WARNING: memory leak will occur if overlay removed, property: /testcase-data/overlay-node/test-bus/i2c-test-bus/test-unittest13/status");
/* device should disable */
ret = of_unittest_apply_overlay_check(13, 13, 1, 0, I2C_OVERLAY);
EXPECT_END(KERN_INFO,
"OF: overlay: WARNING: memory leak will occur if overlay removed, property: /testcase-data/overlay-node/test-bus/i2c-test-bus/test-unittest13/status");
if (ret)
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 __init of_unittest_overlay_i2c_15(void)
{
int ret;
/* device should enable */
EXPECT_BEGIN(KERN_INFO,
"i2c i2c-1: Added multiplexed i2c bus 3");
ret = of_unittest_apply_overlay_check(15, 15, 0, 1, I2C_OVERLAY);
EXPECT_END(KERN_INFO,
"i2c i2c-1: Added multiplexed i2c bus 3");
if (ret)
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 int of_notify(struct notifier_block *nb, unsigned long action,
void *arg)
{
struct of_overlay_notify_data *nd = arg;
struct device_node *found;
int ret;
/*
* For overlay_16 .. overlay_19, check that returning an error
* works for each of the actions by setting an arbitrary return
* error number that matches the test number. e.g. for unittest16,
* ret = -EBUSY which is -16.
*
* OVERLAY_INFO() for the overlays is declared to expect the same
* error number, so overlay_data_apply() will return no error.
*
* overlay_20 will return NOTIFY_DONE
*/
ret = 0;
of_node_get(nd->overlay);
switch (action) {
case OF_OVERLAY_PRE_APPLY:
found = of_find_node_by_name(nd->overlay, "test-unittest16");
if (found) {
of_node_put(found);
ret = -EBUSY;
}
break;
case OF_OVERLAY_POST_APPLY:
found = of_find_node_by_name(nd->overlay, "test-unittest17");
if (found) {
of_node_put(found);
ret = -EEXIST;
}
break;
case OF_OVERLAY_PRE_REMOVE:
found = of_find_node_by_name(nd->overlay, "test-unittest18");
if (found) {
of_node_put(found);
ret = -EXDEV;
}
break;
case OF_OVERLAY_POST_REMOVE:
found = of_find_node_by_name(nd->overlay, "test-unittest19");
if (found) {
of_node_put(found);
ret = -ENODEV;
}
break;
default: /* should not happen */
of_node_put(nd->overlay);
ret = -EINVAL;
break;
}
if (ret)
return notifier_from_errno(ret);
return NOTIFY_DONE;
}
static struct notifier_block of_nb = {
.notifier_call = of_notify,
};
static void __init of_unittest_overlay_notify(void)
{
int ovcs_id;
int ret;
ret = of_overlay_notifier_register(&of_nb);
unittest(!ret,
"of_overlay_notifier_register() failed, ret = %d\n", ret);
if (ret)
return;
/*
* The overlays are applied by overlay_data_apply()
* instead of of_unittest_apply_overlay() so that they
* will not be tracked. Thus they will not be removed
* by of_unittest_remove_tracked_overlays().
*
* Applying overlays 16 - 19 will each trigger an error for a
* different action in of_notify().
*
* Applying overlay 20 will not trigger any error in of_notify().
*/
/* --- overlay 16 --- */
EXPECT_BEGIN(KERN_INFO, "OF: overlay: overlay changeset pre-apply notifier error -16, target: /testcase-data/overlay-node/test-bus");
unittest(overlay_data_apply("overlay_16", &ovcs_id),
"test OF_OVERLAY_PRE_APPLY notify injected error\n");
EXPECT_END(KERN_INFO, "OF: overlay: overlay changeset pre-apply notifier error -16, target: /testcase-data/overlay-node/test-bus");
unittest(ovcs_id, "ovcs_id not created for overlay_16\n");
/* --- overlay 17 --- */
EXPECT_BEGIN(KERN_INFO, "OF: overlay: overlay changeset post-apply notifier error -17, target: /testcase-data/overlay-node/test-bus");
unittest(overlay_data_apply("overlay_17", &ovcs_id),
"test OF_OVERLAY_POST_APPLY notify injected error\n");
EXPECT_END(KERN_INFO, "OF: overlay: overlay changeset post-apply notifier error -17, target: /testcase-data/overlay-node/test-bus");
unittest(ovcs_id, "ovcs_id not created for overlay_17\n");
if (ovcs_id) {
ret = of_overlay_remove(&ovcs_id);
unittest(!ret,
"overlay_17 of_overlay_remove(), ret = %d\n", ret);
}
/* --- overlay 18 --- */
unittest(overlay_data_apply("overlay_18", &ovcs_id),
"OF_OVERLAY_PRE_REMOVE notify injected error\n");
unittest(ovcs_id, "ovcs_id not created for overlay_18\n");
if (ovcs_id) {
EXPECT_BEGIN(KERN_INFO, "OF: overlay: overlay changeset pre-remove notifier error -18, target: /testcase-data/overlay-node/test-bus");
ret = of_overlay_remove(&ovcs_id);
EXPECT_END(KERN_INFO, "OF: overlay: overlay changeset pre-remove notifier error -18, target: /testcase-data/overlay-node/test-bus");
if (ret == -EXDEV) {
/*
* change set ovcs_id should still exist
*/
unittest(1, "overlay_18 of_overlay_remove() injected error for OF_OVERLAY_PRE_REMOVE\n");
} else {
unittest(0, "overlay_18 of_overlay_remove() injected error for OF_OVERLAY_PRE_REMOVE not returned\n");
}
} else {
unittest(1, "ovcs_id not created for overlay_18\n");
}
unittest(ovcs_id, "ovcs_id removed for overlay_18\n");
/* --- overlay 19 --- */
unittest(overlay_data_apply("overlay_19", &ovcs_id),
"OF_OVERLAY_POST_REMOVE notify injected error\n");
unittest(ovcs_id, "ovcs_id not created for overlay_19\n");
if (ovcs_id) {
EXPECT_BEGIN(KERN_INFO, "OF: overlay: overlay changeset post-remove notifier error -19, target: /testcase-data/overlay-node/test-bus");
ret = of_overlay_remove(&ovcs_id);
EXPECT_END(KERN_INFO, "OF: overlay: overlay changeset post-remove notifier error -19, target: /testcase-data/overlay-node/test-bus");
if (ret == -ENODEV)
unittest(1, "overlay_19 of_overlay_remove() injected error for OF_OVERLAY_POST_REMOVE\n");
else
unittest(0, "overlay_19 of_overlay_remove() injected error for OF_OVERLAY_POST_REMOVE not returned\n");
} else {
unittest(1, "ovcs_id removed for overlay_19\n");
}
unittest(!ovcs_id, "changeset ovcs_id = %d not removed for overlay_19\n",
ovcs_id);
/* --- overlay 20 --- */
unittest(overlay_data_apply("overlay_20", &ovcs_id),
"overlay notify no injected error\n");
if (ovcs_id) {
ret = of_overlay_remove(&ovcs_id);
if (ret)
unittest(1, "overlay_20 failed to be destroyed, ret = %d\n",
ret);
} else {
unittest(1, "ovcs_id not created for overlay_20\n");
}
unittest(!of_overlay_notifier_unregister(&of_nb),
"of_overlay_notifier_unregister() failed, ret = %d\n", ret);
}
static void __init of_unittest_overlay(void)
{
struct device_node *bus_np = NULL;
if (platform_driver_register(&unittest_driver)) {
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;
}
if (of_platform_default_populate(bus_np, NULL, NULL)) {
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_overlay_gpio();
of_unittest_remove_tracked_overlays();
of_unittest_overlay_notify();
out:
of_node_put(bus_np);
}
#else
static inline void __init of_unittest_overlay(void) { }
#endif
static void __init of_unittest_lifecycle(void)
{
#ifdef CONFIG_OF_DYNAMIC
unsigned int refcount;
int found_refcount_one = 0;
int put_count = 0;
struct device_node *np;
struct device_node *prev_sibling, *next_sibling;
const char *refcount_path = "/testcase-data/refcount-node";
const char *refcount_parent_path = "/testcase-data";
/*
* Node lifecycle tests, non-dynamic node:
*
* - Decrementing refcount to zero via of_node_put() should cause the
* attempt to free the node memory by of_node_release() to fail
* because the node is not a dynamic node.
*
* - Decrementing refcount past zero should result in additional
* errors reported.
*/
np = of_find_node_by_path(refcount_path);
unittest(np, "find refcount_path \"%s\"\n", refcount_path);
if (np == NULL)
goto out_skip_tests;
while (!found_refcount_one) {
if (put_count++ > 10) {
unittest(0, "guardrail to avoid infinite loop\n");
goto out_skip_tests;
}
refcount = kref_read(&np->kobj.kref);
if (refcount == 1)
found_refcount_one = 1;
else
of_node_put(np);
}
EXPECT_BEGIN(KERN_INFO, "OF: ERROR: of_node_release() detected bad of_node_put() on /testcase-data/refcount-node");
/*
* refcount is now one, decrementing to zero will result in a call to
* of_node_release() to free the node's memory, which should result
* in an error
*/
unittest(1, "/testcase-data/refcount-node is one");
of_node_put(np);
EXPECT_END(KERN_INFO, "OF: ERROR: of_node_release() detected bad of_node_put() on /testcase-data/refcount-node");
/*
* expect stack trace for subsequent of_node_put():
* __refcount_sub_and_test() calls:
* refcount_warn_saturate(r, REFCOUNT_SUB_UAF)
*
* Not capturing entire WARN_ONCE() trace with EXPECT_*(), just
* the first three lines, and the last line.
*/
EXPECT_BEGIN(KERN_INFO, "------------[ cut here ]------------");
EXPECT_BEGIN(KERN_INFO, "WARNING: <<all>>");
EXPECT_BEGIN(KERN_INFO, "refcount_t: underflow; use-after-free.");
EXPECT_BEGIN(KERN_INFO, "---[ end trace <<int>> ]---");
/* refcount is now zero, this should fail */
unittest(1, "/testcase-data/refcount-node is zero");
of_node_put(np);
EXPECT_END(KERN_INFO, "---[ end trace <<int>> ]---");
EXPECT_END(KERN_INFO, "refcount_t: underflow; use-after-free.");
EXPECT_END(KERN_INFO, "WARNING: <<all>>");
EXPECT_END(KERN_INFO, "------------[ cut here ]------------");
/*
* Q. do we expect to get yet another warning?
* A. no, the WARNING is from WARN_ONCE()
*/
EXPECT_NOT_BEGIN(KERN_INFO, "------------[ cut here ]------------");
EXPECT_NOT_BEGIN(KERN_INFO, "WARNING: <<all>>");
EXPECT_NOT_BEGIN(KERN_INFO, "refcount_t: underflow; use-after-free.");
EXPECT_NOT_BEGIN(KERN_INFO, "---[ end trace <<int>> ]---");
unittest(1, "/testcase-data/refcount-node is zero, second time");
of_node_put(np);
EXPECT_NOT_END(KERN_INFO, "---[ end trace <<int>> ]---");
EXPECT_NOT_END(KERN_INFO, "refcount_t: underflow; use-after-free.");
EXPECT_NOT_END(KERN_INFO, "WARNING: <<all>>");
EXPECT_NOT_END(KERN_INFO, "------------[ cut here ]------------");
/*
* refcount of zero will trigger stack traces from any further
* attempt to of_node_get() node "refcount-node". One example of
* this is where of_unittest_check_node_linkage() will recursively
* scan the tree, with 'for_each_child_of_node()' doing an
* of_node_get() of the children of a node.
*
* Prevent the stack trace by removing node "refcount-node" from
* its parent's child list.
*
* WARNING: EVIL, EVIL, EVIL:
*
* Directly manipulate the child list of node /testcase-data to
* remove child refcount-node. This is ignoring all proper methods
* of removing a child and will leak a small amount of memory.
*/
np = of_find_node_by_path(refcount_parent_path);
unittest(np, "find refcount_parent_path \"%s\"\n", refcount_parent_path);
unittest(np, "ERROR: devicetree live tree left in a 'bad state' if test fail\n");
if (np == NULL)
return;
prev_sibling = np->child;
next_sibling = prev_sibling->sibling;
if (!strcmp(prev_sibling->full_name, "refcount-node")) {
np->child = next_sibling;
next_sibling = next_sibling->sibling;
}
while (next_sibling) {
if (!strcmp(next_sibling->full_name, "refcount-node"))
prev_sibling->sibling = next_sibling->sibling;
prev_sibling = next_sibling;
next_sibling = next_sibling->sibling;
}
of_node_put(np);
return;
out_skip_tests:
#endif
unittest(0, "One or more lifecycle tests skipped\n");
}
#ifdef CONFIG_OF_OVERLAY
/*
* __dtbo_##overlay_name##_begin[] and __dtbo_##overlay_name##_end[] are
* created by cmd_dt_S_dtbo in scripts/Makefile.lib
*/
#define OVERLAY_INFO_EXTERN(overlay_name) \
extern uint8_t __dtbo_##overlay_name##_begin[]; \
extern uint8_t __dtbo_##overlay_name##_end[]
#define OVERLAY_INFO(overlay_name, expected) \
{ .dtbo_begin = __dtbo_##overlay_name##_begin, \
.dtbo_end = __dtbo_##overlay_name##_end, \
.expected_result = expected, \
.name = #overlay_name, \
}
struct overlay_info {
uint8_t *dtbo_begin;
uint8_t *dtbo_end;
int expected_result;
int ovcs_id;
char *name;
};
OVERLAY_INFO_EXTERN(overlay_base);
OVERLAY_INFO_EXTERN(overlay);
OVERLAY_INFO_EXTERN(overlay_0);
OVERLAY_INFO_EXTERN(overlay_1);
OVERLAY_INFO_EXTERN(overlay_2);
OVERLAY_INFO_EXTERN(overlay_3);
OVERLAY_INFO_EXTERN(overlay_4);
OVERLAY_INFO_EXTERN(overlay_5);
OVERLAY_INFO_EXTERN(overlay_6);
OVERLAY_INFO_EXTERN(overlay_7);
OVERLAY_INFO_EXTERN(overlay_8);
OVERLAY_INFO_EXTERN(overlay_9);
OVERLAY_INFO_EXTERN(overlay_10);
OVERLAY_INFO_EXTERN(overlay_11);
OVERLAY_INFO_EXTERN(overlay_12);
OVERLAY_INFO_EXTERN(overlay_13);
OVERLAY_INFO_EXTERN(overlay_15);
OVERLAY_INFO_EXTERN(overlay_16);
OVERLAY_INFO_EXTERN(overlay_17);
OVERLAY_INFO_EXTERN(overlay_18);
OVERLAY_INFO_EXTERN(overlay_19);
OVERLAY_INFO_EXTERN(overlay_20);
OVERLAY_INFO_EXTERN(overlay_gpio_01);
OVERLAY_INFO_EXTERN(overlay_gpio_02a);
OVERLAY_INFO_EXTERN(overlay_gpio_02b);
OVERLAY_INFO_EXTERN(overlay_gpio_03);
OVERLAY_INFO_EXTERN(overlay_gpio_04a);
OVERLAY_INFO_EXTERN(overlay_gpio_04b);
OVERLAY_INFO_EXTERN(overlay_bad_add_dup_node);
OVERLAY_INFO_EXTERN(overlay_bad_add_dup_prop);
OVERLAY_INFO_EXTERN(overlay_bad_phandle);
OVERLAY_INFO_EXTERN(overlay_bad_symbol);
/* entries found by name */
static struct overlay_info overlays[] = {
OVERLAY_INFO(overlay_base, -9999),
OVERLAY_INFO(overlay, 0),
OVERLAY_INFO(overlay_0, 0),
OVERLAY_INFO(overlay_1, 0),
OVERLAY_INFO(overlay_2, 0),
OVERLAY_INFO(overlay_3, 0),
OVERLAY_INFO(overlay_4, 0),
OVERLAY_INFO(overlay_5, 0),
OVERLAY_INFO(overlay_6, 0),
OVERLAY_INFO(overlay_7, 0),
OVERLAY_INFO(overlay_8, 0),
OVERLAY_INFO(overlay_9, 0),
OVERLAY_INFO(overlay_10, 0),
OVERLAY_INFO(overlay_11, 0),
OVERLAY_INFO(overlay_12, 0),
OVERLAY_INFO(overlay_13, 0),
OVERLAY_INFO(overlay_15, 0),
OVERLAY_INFO(overlay_16, -EBUSY),
OVERLAY_INFO(overlay_17, -EEXIST),
OVERLAY_INFO(overlay_18, 0),
OVERLAY_INFO(overlay_19, 0),
OVERLAY_INFO(overlay_20, 0),
OVERLAY_INFO(overlay_gpio_01, 0),
OVERLAY_INFO(overlay_gpio_02a, 0),
OVERLAY_INFO(overlay_gpio_02b, 0),
OVERLAY_INFO(overlay_gpio_03, 0),
OVERLAY_INFO(overlay_gpio_04a, 0),
OVERLAY_INFO(overlay_gpio_04b, 0),
OVERLAY_INFO(overlay_bad_add_dup_node, -EINVAL),
OVERLAY_INFO(overlay_bad_add_dup_prop, -EINVAL),
OVERLAY_INFO(overlay_bad_phandle, -EINVAL),
OVERLAY_INFO(overlay_bad_symbol, -EINVAL),
/* end marker */
{.dtbo_begin = NULL, .dtbo_end = NULL, .expected_result = 0, .name = NULL}
};
static struct device_node *overlay_base_root;
static void * __init dt_alloc_memory(u64 size, u64 align)
{
void *ptr = memblock_alloc(size, align);
if (!ptr)
panic("%s: Failed to allocate %llu bytes align=0x%llx\n",
__func__, size, align);
return ptr;
}
/*
* 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;
void *new_fdt;
u32 size;
int found = 0;
const char *overlay_name = "overlay_base";
for (info = overlays; info && info->name; info++) {
if (!strcmp(overlay_name, info->name)) {
found = 1;
break;
}
}
if (!found) {
pr_err("no overlay data for %s\n", overlay_name);
return;
}
info = &overlays[0];
if (info->expected_result != -9999) {
pr_err("No dtb 'overlay_base' to attach\n");
return;
}
data_size = info->dtbo_end - info->dtbo_begin;
if (!data_size) {
pr_err("No dtb 'overlay_base' to attach\n");
return;
}
size = fdt_totalsize(info->dtbo_begin);
if (size != data_size) {
pr_err("dtb 'overlay_base' header totalsize != actual size");
return;
}
new_fdt = dt_alloc_memory(size, roundup_pow_of_two(FDT_V17_SIZE));
if (!new_fdt) {
pr_err("alloc for dtb 'overlay_base' failed");
return;
}
memcpy(new_fdt, info->dtbo_begin, size);
__unflatten_device_tree(new_fdt, NULL, &overlay_base_root,
dt_alloc_memory, true);
}
/*
* 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_apply(const char *overlay_name, int *ovcs_id)
{
struct overlay_info *info;
int found = 0;
int ret;
u32 size;
for (info = overlays; info && info->name; info++) {
if (!strcmp(overlay_name, info->name)) {
found = 1;
break;
}
}
if (!found) {
pr_err("no overlay data for %s\n", overlay_name);
return 0;
}
size = info->dtbo_end - info->dtbo_begin;
if (!size)
pr_err("no overlay data for %s\n", overlay_name);
ret = of_overlay_fdt_apply(info->dtbo_begin, size, &info->ovcs_id);
if (ovcs_id)
*ovcs_id = info->ovcs_id;
if (ret < 0)
goto out;
pr_debug("%s applied\n", overlay_name);
out:
if (ret != info->expected_result)
pr_err("of_overlay_fdt_apply() expected %d, ret=%d, %s\n",
info->expected_result, ret, overlay_name);
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_name_eq(np, "__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_name_eq(np, "__symbols__")) {
overlay_base_symbols = np;
*pprev = np->sibling;
break;
}
pprev = &np->sibling;
}
}
for_each_child_of_node(overlay_base_root, np) {
struct device_node *base_child;
for_each_child_of_node(of_root, base_child) {
if (!strcmp(np->full_name, base_child->full_name)) {
unittest(0, "illegal node name in overlay_base %pOFn",
np);
of_node_put(np);
of_node_put(base_child);
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) {
struct property *new_prop;
for_each_property_of_node(overlay_base_symbols, prop) {
new_prop = __of_prop_dup(prop, GFP_KERNEL);
if (!new_prop) {
unittest(0, "__of_prop_dup() of '%s' from overlay_base node __symbols__",
prop->name);
goto err_unlock;
}
if (__of_add_property(of_symbols, new_prop)) {
kfree(new_prop->name);
kfree(new_prop->value);
kfree(new_prop);
/* "name" auto-generated by unflatten */
if (!strcmp(prop->name, "name"))
continue;
unittest(0, "duplicate property '%s' in overlay_base node __symbols__",
prop->name);
goto err_unlock;
}
if (__of_add_property_sysfs(of_symbols, new_prop)) {
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 */
EXPECT_BEGIN(KERN_ERR,
"OF: overlay: WARNING: memory leak will occur if overlay removed, property: /testcase-data-2/substation@100/status");
EXPECT_BEGIN(KERN_ERR,
"OF: overlay: WARNING: memory leak will occur if overlay removed, property: /testcase-data-2/fairway-1/status");
EXPECT_BEGIN(KERN_ERR,
"OF: overlay: WARNING: memory leak will occur if overlay removed, property: /testcase-data-2/fairway-1/ride@100/track@30/incline-up");
EXPECT_BEGIN(KERN_ERR,
"OF: overlay: WARNING: memory leak will occur if overlay removed, property: /testcase-data-2/fairway-1/ride@100/track@40/incline-up");
EXPECT_BEGIN(KERN_ERR,
"OF: overlay: WARNING: memory leak will occur if overlay removed, property: /testcase-data-2/lights@40000/status");
EXPECT_BEGIN(KERN_ERR,
"OF: overlay: WARNING: memory leak will occur if overlay removed, property: /testcase-data-2/lights@40000/color");
EXPECT_BEGIN(KERN_ERR,
"OF: overlay: WARNING: memory leak will occur if overlay removed, property: /testcase-data-2/lights@40000/rate");
EXPECT_BEGIN(KERN_ERR,
"OF: overlay: WARNING: memory leak will occur if overlay removed, property: /__symbols__/hvac_2");
EXPECT_BEGIN(KERN_ERR,
"OF: overlay: WARNING: memory leak will occur if overlay removed, property: /__symbols__/ride_200");
EXPECT_BEGIN(KERN_ERR,
"OF: overlay: WARNING: memory leak will occur if overlay removed, property: /__symbols__/ride_200_left");
EXPECT_BEGIN(KERN_ERR,
"OF: overlay: WARNING: memory leak will occur if overlay removed, property: /__symbols__/ride_200_right");
ret = overlay_data_apply("overlay", NULL);
EXPECT_END(KERN_ERR,
"OF: overlay: WARNING: memory leak will occur if overlay removed, property: /__symbols__/ride_200_right");
EXPECT_END(KERN_ERR,
"OF: overlay: WARNING: memory leak will occur if overlay removed, property: /__symbols__/ride_200_left");
EXPECT_END(KERN_ERR,
"OF: overlay: WARNING: memory leak will occur if overlay removed, property: /__symbols__/ride_200");
EXPECT_END(KERN_ERR,
"OF: overlay: WARNING: memory leak will occur if overlay removed, property: /__symbols__/hvac_2");
EXPECT_END(KERN_ERR,
"OF: overlay: WARNING: memory leak will occur if overlay removed, property: /testcase-data-2/lights@40000/rate");
EXPECT_END(KERN_ERR,
"OF: overlay: WARNING: memory leak will occur if overlay removed, property: /testcase-data-2/lights@40000/color");
EXPECT_END(KERN_ERR,
"OF: overlay: WARNING: memory leak will occur if overlay removed, property: /testcase-data-2/lights@40000/status");
EXPECT_END(KERN_ERR,
"OF: overlay: WARNING: memory leak will occur if overlay removed, property: /testcase-data-2/fairway-1/ride@100/track@40/incline-up");
EXPECT_END(KERN_ERR,
"OF: overlay: WARNING: memory leak will occur if overlay removed, property: /testcase-data-2/fairway-1/ride@100/track@30/incline-up");
EXPECT_END(KERN_ERR,
"OF: overlay: WARNING: memory leak will occur if overlay removed, property: /testcase-data-2/fairway-1/status");
EXPECT_END(KERN_ERR,
"OF: overlay: WARNING: memory leak will occur if overlay removed, property: /testcase-data-2/substation@100/status");
unittest(ret, "Adding overlay 'overlay' failed\n");
EXPECT_BEGIN(KERN_ERR,
"OF: overlay: ERROR: multiple fragments add and/or delete node /testcase-data-2/substation@100/motor-1/controller");
EXPECT_BEGIN(KERN_ERR,
"OF: overlay: ERROR: multiple fragments add, update, and/or delete property /testcase-data-2/substation@100/motor-1/controller/name");
unittest(overlay_data_apply("overlay_bad_add_dup_node", NULL),
"Adding overlay 'overlay_bad_add_dup_node' failed\n");
EXPECT_END(KERN_ERR,
"OF: overlay: ERROR: multiple fragments add, update, and/or delete property /testcase-data-2/substation@100/motor-1/controller/name");
EXPECT_END(KERN_ERR,
"OF: overlay: ERROR: multiple fragments add and/or delete node /testcase-data-2/substation@100/motor-1/controller");
EXPECT_BEGIN(KERN_ERR,
"OF: overlay: ERROR: multiple fragments add and/or delete node /testcase-data-2/substation@100/motor-1/electric");
EXPECT_BEGIN(KERN_ERR,
"OF: overlay: ERROR: multiple fragments add, update, and/or delete property /testcase-data-2/substation@100/motor-1/electric/rpm_avail");
EXPECT_BEGIN(KERN_ERR,
"OF: overlay: ERROR: multiple fragments add, update, and/or delete property /testcase-data-2/substation@100/motor-1/electric/name");
unittest(overlay_data_apply("overlay_bad_add_dup_prop", NULL),
"Adding overlay 'overlay_bad_add_dup_prop' failed\n");
EXPECT_END(KERN_ERR,
"OF: overlay: ERROR: multiple fragments add, update, and/or delete property /testcase-data-2/substation@100/motor-1/electric/name");
EXPECT_END(KERN_ERR,
"OF: overlay: ERROR: multiple fragments add, update, and/or delete property /testcase-data-2/substation@100/motor-1/electric/rpm_avail");
EXPECT_END(KERN_ERR,
"OF: overlay: ERROR: multiple fragments add and/or delete node /testcase-data-2/substation@100/motor-1/electric");
unittest(overlay_data_apply("overlay_bad_phandle", NULL),
"Adding overlay 'overlay_bad_phandle' failed\n");
unittest(overlay_data_apply("overlay_bad_symbol", NULL),
"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;
pr_info("start of unittest - you will see error messages\n");
/* Taint the kernel so we know we've run tests. */
add_taint(TAINT_TEST, LOCKDEP_STILL_OK);
/* adding data for unittest */
if (IS_ENABLED(CONFIG_UML))
unittest_unflatten_overlay_base();
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);
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_parse_phandle_with_args_map();
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_dma_get_max_cpu_address();
of_unittest_parse_dma_ranges();
of_unittest_pci_dma_ranges();
of_unittest_match_node();
of_unittest_platform_populate();
of_unittest_overlay();
of_unittest_lifecycle();
/* 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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