545 lines
16 KiB
C
545 lines
16 KiB
C
/*
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* Self tests for device tree subsystem
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*/
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#define pr_fmt(fmt) "### dt-test ### " fmt
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#include <linux/clk.h>
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#include <linux/err.h>
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#include <linux/errno.h>
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#include <linux/module.h>
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#include <linux/of.h>
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#include <linux/of_irq.h>
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#include <linux/of_platform.h>
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#include <linux/list.h>
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#include <linux/mutex.h>
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#include <linux/slab.h>
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#include <linux/device.h>
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static struct selftest_results {
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int passed;
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int failed;
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} selftest_results;
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#define selftest(result, fmt, ...) { \
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if (!(result)) { \
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selftest_results.failed++; \
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pr_err("FAIL %s():%i " fmt, __func__, __LINE__, ##__VA_ARGS__); \
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} else { \
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selftest_results.passed++; \
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pr_debug("pass %s():%i\n", __func__, __LINE__); \
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} \
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}
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static void __init of_selftest_find_node_by_name(void)
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{
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struct device_node *np;
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np = of_find_node_by_path("/testcase-data");
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selftest(np && !strcmp("/testcase-data", np->full_name),
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"find /testcase-data failed\n");
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of_node_put(np);
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/* Test if trailing '/' works */
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np = of_find_node_by_path("/testcase-data/");
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selftest(!np, "trailing '/' on /testcase-data/ should fail\n");
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np = of_find_node_by_path("/testcase-data/phandle-tests/consumer-a");
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selftest(np && !strcmp("/testcase-data/phandle-tests/consumer-a", np->full_name),
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"find /testcase-data/phandle-tests/consumer-a failed\n");
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of_node_put(np);
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np = of_find_node_by_path("testcase-alias");
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selftest(np && !strcmp("/testcase-data", np->full_name),
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"find testcase-alias failed\n");
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of_node_put(np);
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/* Test if trailing '/' works on aliases */
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np = of_find_node_by_path("testcase-alias/");
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selftest(!np, "trailing '/' on testcase-alias/ should fail\n");
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np = of_find_node_by_path("testcase-alias/phandle-tests/consumer-a");
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selftest(np && !strcmp("/testcase-data/phandle-tests/consumer-a", np->full_name),
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"find testcase-alias/phandle-tests/consumer-a failed\n");
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of_node_put(np);
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np = of_find_node_by_path("/testcase-data/missing-path");
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selftest(!np, "non-existent path returned node %s\n", np->full_name);
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of_node_put(np);
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np = of_find_node_by_path("missing-alias");
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selftest(!np, "non-existent alias returned node %s\n", np->full_name);
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of_node_put(np);
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np = of_find_node_by_path("testcase-alias/missing-path");
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selftest(!np, "non-existent alias with relative path returned node %s\n", np->full_name);
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of_node_put(np);
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}
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static void __init of_selftest_dynamic(void)
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{
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struct device_node *np;
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struct property *prop;
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np = of_find_node_by_path("/testcase-data");
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if (!np) {
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pr_err("missing testcase data\n");
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return;
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}
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/* Array of 4 properties for the purpose of testing */
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prop = kzalloc(sizeof(*prop) * 4, GFP_KERNEL);
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if (!prop) {
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selftest(0, "kzalloc() failed\n");
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return;
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}
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/* Add a new property - should pass*/
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prop->name = "new-property";
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prop->value = "new-property-data";
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prop->length = strlen(prop->value);
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selftest(of_add_property(np, prop) == 0, "Adding a new property failed\n");
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/* Try to add an existing property - should fail */
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prop++;
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prop->name = "new-property";
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prop->value = "new-property-data-should-fail";
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prop->length = strlen(prop->value);
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selftest(of_add_property(np, prop) != 0,
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"Adding an existing property should have failed\n");
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/* Try to modify an existing property - should pass */
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prop->value = "modify-property-data-should-pass";
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prop->length = strlen(prop->value);
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selftest(of_update_property(np, prop) == 0,
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"Updating an existing property should have passed\n");
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/* Try to modify non-existent property - should pass*/
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prop++;
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prop->name = "modify-property";
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prop->value = "modify-missing-property-data-should-pass";
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prop->length = strlen(prop->value);
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selftest(of_update_property(np, prop) == 0,
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"Updating a missing property should have passed\n");
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/* Remove property - should pass */
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selftest(of_remove_property(np, prop) == 0,
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"Removing a property should have passed\n");
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/* Adding very large property - should pass */
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prop++;
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prop->name = "large-property-PAGE_SIZEx8";
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prop->length = PAGE_SIZE * 8;
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prop->value = kzalloc(prop->length, GFP_KERNEL);
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selftest(prop->value != NULL, "Unable to allocate large buffer\n");
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if (prop->value)
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selftest(of_add_property(np, prop) == 0,
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"Adding a large property should have passed\n");
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}
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static void __init of_selftest_parse_phandle_with_args(void)
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{
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struct device_node *np;
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struct of_phandle_args args;
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int i, rc;
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np = of_find_node_by_path("/testcase-data/phandle-tests/consumer-a");
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if (!np) {
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pr_err("missing testcase data\n");
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return;
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}
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rc = of_count_phandle_with_args(np, "phandle-list", "#phandle-cells");
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selftest(rc == 7, "of_count_phandle_with_args() returned %i, expected 7\n", rc);
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for (i = 0; i < 8; i++) {
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bool passed = true;
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rc = of_parse_phandle_with_args(np, "phandle-list",
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"#phandle-cells", i, &args);
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/* Test the values from tests-phandle.dtsi */
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switch (i) {
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case 0:
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passed &= !rc;
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passed &= (args.args_count == 1);
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passed &= (args.args[0] == (i + 1));
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break;
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case 1:
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passed &= !rc;
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passed &= (args.args_count == 2);
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passed &= (args.args[0] == (i + 1));
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passed &= (args.args[1] == 0);
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break;
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case 2:
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passed &= (rc == -ENOENT);
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break;
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case 3:
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passed &= !rc;
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passed &= (args.args_count == 3);
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passed &= (args.args[0] == (i + 1));
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passed &= (args.args[1] == 4);
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passed &= (args.args[2] == 3);
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break;
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case 4:
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passed &= !rc;
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passed &= (args.args_count == 2);
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passed &= (args.args[0] == (i + 1));
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passed &= (args.args[1] == 100);
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break;
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case 5:
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passed &= !rc;
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passed &= (args.args_count == 0);
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break;
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case 6:
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passed &= !rc;
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passed &= (args.args_count == 1);
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passed &= (args.args[0] == (i + 1));
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break;
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case 7:
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passed &= (rc == -ENOENT);
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break;
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default:
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passed = false;
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}
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selftest(passed, "index %i - data error on node %s rc=%i\n",
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i, args.np->full_name, rc);
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}
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/* Check for missing list property */
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rc = of_parse_phandle_with_args(np, "phandle-list-missing",
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"#phandle-cells", 0, &args);
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selftest(rc == -ENOENT, "expected:%i got:%i\n", -ENOENT, rc);
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rc = of_count_phandle_with_args(np, "phandle-list-missing",
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"#phandle-cells");
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selftest(rc == -ENOENT, "expected:%i got:%i\n", -ENOENT, rc);
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/* Check for missing cells property */
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rc = of_parse_phandle_with_args(np, "phandle-list",
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"#phandle-cells-missing", 0, &args);
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selftest(rc == -EINVAL, "expected:%i got:%i\n", -EINVAL, rc);
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rc = of_count_phandle_with_args(np, "phandle-list",
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"#phandle-cells-missing");
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selftest(rc == -EINVAL, "expected:%i got:%i\n", -EINVAL, rc);
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/* Check for bad phandle in list */
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rc = of_parse_phandle_with_args(np, "phandle-list-bad-phandle",
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"#phandle-cells", 0, &args);
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selftest(rc == -EINVAL, "expected:%i got:%i\n", -EINVAL, rc);
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rc = of_count_phandle_with_args(np, "phandle-list-bad-phandle",
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"#phandle-cells");
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selftest(rc == -EINVAL, "expected:%i got:%i\n", -EINVAL, rc);
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/* Check for incorrectly formed argument list */
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rc = of_parse_phandle_with_args(np, "phandle-list-bad-args",
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"#phandle-cells", 1, &args);
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selftest(rc == -EINVAL, "expected:%i got:%i\n", -EINVAL, rc);
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rc = of_count_phandle_with_args(np, "phandle-list-bad-args",
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"#phandle-cells");
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selftest(rc == -EINVAL, "expected:%i got:%i\n", -EINVAL, rc);
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}
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static void __init of_selftest_property_match_string(void)
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{
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struct device_node *np;
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int rc;
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np = of_find_node_by_path("/testcase-data/phandle-tests/consumer-a");
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if (!np) {
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pr_err("No testcase data in device tree\n");
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return;
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}
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rc = of_property_match_string(np, "phandle-list-names", "first");
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selftest(rc == 0, "first expected:0 got:%i\n", rc);
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rc = of_property_match_string(np, "phandle-list-names", "second");
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selftest(rc == 1, "second expected:0 got:%i\n", rc);
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rc = of_property_match_string(np, "phandle-list-names", "third");
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selftest(rc == 2, "third expected:0 got:%i\n", rc);
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rc = of_property_match_string(np, "phandle-list-names", "fourth");
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selftest(rc == -ENODATA, "unmatched string; rc=%i", rc);
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rc = of_property_match_string(np, "missing-property", "blah");
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selftest(rc == -EINVAL, "missing property; rc=%i", rc);
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rc = of_property_match_string(np, "empty-property", "blah");
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selftest(rc == -ENODATA, "empty property; rc=%i", rc);
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rc = of_property_match_string(np, "unterminated-string", "blah");
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selftest(rc == -EILSEQ, "unterminated string; rc=%i", rc);
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}
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static void __init of_selftest_parse_interrupts(void)
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{
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struct device_node *np;
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struct of_phandle_args args;
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int i, rc;
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np = of_find_node_by_path("/testcase-data/interrupts/interrupts0");
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if (!np) {
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pr_err("missing testcase data\n");
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return;
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}
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for (i = 0; i < 4; i++) {
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bool passed = true;
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args.args_count = 0;
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rc = of_irq_parse_one(np, i, &args);
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passed &= !rc;
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passed &= (args.args_count == 1);
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passed &= (args.args[0] == (i + 1));
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selftest(passed, "index %i - data error on node %s rc=%i\n",
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i, args.np->full_name, rc);
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}
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of_node_put(np);
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np = of_find_node_by_path("/testcase-data/interrupts/interrupts1");
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if (!np) {
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pr_err("missing testcase data\n");
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return;
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}
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for (i = 0; i < 4; i++) {
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bool passed = true;
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args.args_count = 0;
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rc = of_irq_parse_one(np, i, &args);
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/* Test the values from tests-phandle.dtsi */
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switch (i) {
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case 0:
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passed &= !rc;
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passed &= (args.args_count == 1);
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passed &= (args.args[0] == 9);
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break;
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case 1:
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passed &= !rc;
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passed &= (args.args_count == 3);
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passed &= (args.args[0] == 10);
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passed &= (args.args[1] == 11);
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passed &= (args.args[2] == 12);
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break;
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case 2:
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passed &= !rc;
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passed &= (args.args_count == 2);
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passed &= (args.args[0] == 13);
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passed &= (args.args[1] == 14);
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break;
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case 3:
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passed &= !rc;
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passed &= (args.args_count == 2);
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passed &= (args.args[0] == 15);
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passed &= (args.args[1] == 16);
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break;
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default:
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passed = false;
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}
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selftest(passed, "index %i - data error on node %s rc=%i\n",
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i, args.np->full_name, rc);
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}
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of_node_put(np);
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}
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static void __init of_selftest_parse_interrupts_extended(void)
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{
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struct device_node *np;
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struct of_phandle_args args;
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int i, rc;
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np = of_find_node_by_path("/testcase-data/interrupts/interrupts-extended0");
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if (!np) {
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pr_err("missing testcase data\n");
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return;
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}
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for (i = 0; i < 7; i++) {
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bool passed = true;
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rc = of_irq_parse_one(np, i, &args);
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/* Test the values from tests-phandle.dtsi */
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switch (i) {
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case 0:
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passed &= !rc;
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passed &= (args.args_count == 1);
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passed &= (args.args[0] == 1);
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break;
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case 1:
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passed &= !rc;
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passed &= (args.args_count == 3);
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passed &= (args.args[0] == 2);
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passed &= (args.args[1] == 3);
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passed &= (args.args[2] == 4);
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break;
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case 2:
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passed &= !rc;
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passed &= (args.args_count == 2);
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passed &= (args.args[0] == 5);
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passed &= (args.args[1] == 6);
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break;
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case 3:
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passed &= !rc;
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passed &= (args.args_count == 1);
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passed &= (args.args[0] == 9);
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break;
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case 4:
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passed &= !rc;
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passed &= (args.args_count == 3);
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passed &= (args.args[0] == 10);
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passed &= (args.args[1] == 11);
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passed &= (args.args[2] == 12);
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break;
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case 5:
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passed &= !rc;
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passed &= (args.args_count == 2);
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passed &= (args.args[0] == 13);
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passed &= (args.args[1] == 14);
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break;
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case 6:
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passed &= !rc;
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passed &= (args.args_count == 1);
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passed &= (args.args[0] == 15);
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break;
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default:
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passed = false;
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}
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selftest(passed, "index %i - data error on node %s rc=%i\n",
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i, args.np->full_name, rc);
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}
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of_node_put(np);
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}
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static struct of_device_id match_node_table[] = {
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{ .data = "A", .name = "name0", }, /* Name alone is lowest priority */
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{ .data = "B", .type = "type1", }, /* followed by type alone */
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{ .data = "Ca", .name = "name2", .type = "type1", }, /* followed by both together */
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{ .data = "Cb", .name = "name2", }, /* Only match when type doesn't match */
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{ .data = "Cc", .name = "name2", .type = "type2", },
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{ .data = "E", .compatible = "compat3" },
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{ .data = "G", .compatible = "compat2", },
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{ .data = "H", .compatible = "compat2", .name = "name5", },
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{ .data = "I", .compatible = "compat2", .type = "type1", },
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{ .data = "J", .compatible = "compat2", .type = "type1", .name = "name8", },
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{ .data = "K", .compatible = "compat2", .name = "name9", },
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{}
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};
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static struct {
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const char *path;
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const char *data;
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} match_node_tests[] = {
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{ .path = "/testcase-data/match-node/name0", .data = "A", },
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{ .path = "/testcase-data/match-node/name1", .data = "B", },
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{ .path = "/testcase-data/match-node/a/name2", .data = "Ca", },
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{ .path = "/testcase-data/match-node/b/name2", .data = "Cb", },
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{ .path = "/testcase-data/match-node/c/name2", .data = "Cc", },
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{ .path = "/testcase-data/match-node/name3", .data = "E", },
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{ .path = "/testcase-data/match-node/name4", .data = "G", },
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{ .path = "/testcase-data/match-node/name5", .data = "H", },
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{ .path = "/testcase-data/match-node/name6", .data = "G", },
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{ .path = "/testcase-data/match-node/name7", .data = "I", },
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{ .path = "/testcase-data/match-node/name8", .data = "J", },
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{ .path = "/testcase-data/match-node/name9", .data = "K", },
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};
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static void __init of_selftest_match_node(void)
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{
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struct device_node *np;
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const struct of_device_id *match;
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int i;
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for (i = 0; i < ARRAY_SIZE(match_node_tests); i++) {
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np = of_find_node_by_path(match_node_tests[i].path);
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if (!np) {
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selftest(0, "missing testcase node %s\n",
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match_node_tests[i].path);
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continue;
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}
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match = of_match_node(match_node_table, np);
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if (!match) {
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selftest(0, "%s didn't match anything\n",
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match_node_tests[i].path);
|
|
continue;
|
|
}
|
|
|
|
if (strcmp(match->data, match_node_tests[i].data) != 0) {
|
|
selftest(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;
|
|
}
|
|
selftest(1, "passed");
|
|
}
|
|
}
|
|
|
|
static void __init of_selftest_platform_populate(void)
|
|
{
|
|
int irq;
|
|
struct device_node *np, *child;
|
|
struct platform_device *pdev;
|
|
struct of_device_id match[] = {
|
|
{ .compatible = "test-device", },
|
|
{}
|
|
};
|
|
|
|
np = of_find_node_by_path("/testcase-data");
|
|
of_platform_populate(np, of_default_bus_match_table, 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);
|
|
selftest(pdev, "device 1 creation failed\n");
|
|
|
|
irq = platform_get_irq(pdev, 0);
|
|
selftest(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);
|
|
selftest(pdev, "device 2 creation failed\n");
|
|
irq = platform_get_irq(pdev, 0);
|
|
selftest(irq < 0 && irq != -EPROBE_DEFER, "device parsing error failed - %d\n", irq);
|
|
|
|
np = of_find_node_by_path("/testcase-data/platform-tests");
|
|
if (!np) {
|
|
pr_err("No testcase data in device tree\n");
|
|
return;
|
|
}
|
|
|
|
for_each_child_of_node(np, child) {
|
|
struct device_node *grandchild;
|
|
of_platform_populate(child, match, NULL, NULL);
|
|
for_each_child_of_node(child, grandchild)
|
|
selftest(of_find_device_by_node(grandchild),
|
|
"Could not create device for node '%s'\n",
|
|
grandchild->name);
|
|
}
|
|
}
|
|
|
|
static int __init of_selftest(void)
|
|
{
|
|
struct device_node *np;
|
|
|
|
np = of_find_node_by_path("/testcase-data/phandle-tests/consumer-a");
|
|
if (!np) {
|
|
pr_info("No testcase data in device tree; not running tests\n");
|
|
return 0;
|
|
}
|
|
of_node_put(np);
|
|
|
|
pr_info("start of selftest - you will see error messages\n");
|
|
of_selftest_find_node_by_name();
|
|
of_selftest_dynamic();
|
|
of_selftest_parse_phandle_with_args();
|
|
of_selftest_property_match_string();
|
|
of_selftest_parse_interrupts();
|
|
of_selftest_parse_interrupts_extended();
|
|
of_selftest_match_node();
|
|
of_selftest_platform_populate();
|
|
pr_info("end of selftest - %i passed, %i failed\n",
|
|
selftest_results.passed, selftest_results.failed);
|
|
return 0;
|
|
}
|
|
late_initcall(of_selftest);
|