ae9304c9d3
This patch attaches selftest's device tree data (required by /drivers/of/selftest.c) dynamically into live device tree. First, it links selftest device tree data into the kernel image and then iterates over all the nodes and attaches them into the live tree. Once the testcases are complete, it removes the data attached. This patch will remove the manual process of addition and removal of selftest device tree data into the machine's dts file. Tested successfully with current selftest's testcases. Signed-off-by: Gaurav Minocha <gaurav.minocha.os@gmail.com> [glikely: Removed ability to build as a module and fixed no-devicetree bug] Signed-off-by: Grant Likely <grant.likely@linaro.org>
700 lines
19 KiB
C
700 lines
19 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_fdt.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 NO_OF_NODES 2
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static struct device_node *nodes[NO_OF_NODES];
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static int last_node_index;
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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)
|
|
{
|
|
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) {
|
|
selftest(0, "missing testcase node %s\n",
|
|
match_node_tests[i].path);
|
|
continue;
|
|
}
|
|
|
|
match = of_match_node(match_node_table, np);
|
|
if (!match) {
|
|
selftest(0, "%s didn't match anything\n",
|
|
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);
|
|
}
|
|
}
|
|
|
|
/**
|
|
* update_node_properties - adds the properties
|
|
* of np into dup node (present in live tree) and
|
|
* updates parent of children of np to dup.
|
|
*
|
|
* @np: node already present in live tree
|
|
* @dup: node present in live tree to be updated
|
|
*/
|
|
static void update_node_properties(struct device_node *np,
|
|
struct device_node *dup)
|
|
{
|
|
struct property *prop;
|
|
struct device_node *child;
|
|
|
|
for_each_property_of_node(np, prop)
|
|
of_add_property(dup, prop);
|
|
|
|
for_each_child_of_node(np, child)
|
|
child->parent = dup;
|
|
}
|
|
|
|
/**
|
|
* attach_node_and_children - attaches nodes
|
|
* and its children to live tree
|
|
*
|
|
* @np: Node to attach to live tree
|
|
*/
|
|
static int attach_node_and_children(struct device_node *np)
|
|
{
|
|
struct device_node *next, *root = np, *dup;
|
|
|
|
if (!np) {
|
|
pr_warn("%s: No tree to attach; not running tests\n",
|
|
__func__);
|
|
return -ENODATA;
|
|
}
|
|
|
|
|
|
/* skip root node */
|
|
np = np->child;
|
|
/* storing a copy in temporary node */
|
|
dup = np;
|
|
|
|
while (dup) {
|
|
nodes[last_node_index++] = dup;
|
|
dup = dup->sibling;
|
|
}
|
|
dup = NULL;
|
|
|
|
while (np) {
|
|
next = np->allnext;
|
|
dup = of_find_node_by_path(np->full_name);
|
|
if (dup)
|
|
update_node_properties(np, dup);
|
|
else {
|
|
np->child = NULL;
|
|
if (np->parent == root)
|
|
np->parent = of_allnodes;
|
|
of_attach_node(np);
|
|
}
|
|
np = next;
|
|
}
|
|
|
|
return 0;
|
|
}
|
|
|
|
/**
|
|
* selftest_data_add - Reads, copies data from
|
|
* linked tree and attaches it to the live tree
|
|
*/
|
|
static int __init selftest_data_add(void)
|
|
{
|
|
void *selftest_data;
|
|
struct device_node *selftest_data_node;
|
|
extern uint8_t __dtb_testcases_begin[];
|
|
extern uint8_t __dtb_testcases_end[];
|
|
const int size = __dtb_testcases_end - __dtb_testcases_begin;
|
|
|
|
if (!size || !of_allnodes) {
|
|
pr_warn("%s: No testcase data to attach; not running tests\n",
|
|
__func__);
|
|
return -ENODATA;
|
|
}
|
|
|
|
/* creating copy */
|
|
selftest_data = kmemdup(__dtb_testcases_begin, size, GFP_KERNEL);
|
|
|
|
if (!selftest_data) {
|
|
pr_warn("%s: Failed to allocate memory for selftest_data; "
|
|
"not running tests\n", __func__);
|
|
return -ENOMEM;
|
|
}
|
|
of_fdt_unflatten_tree(selftest_data, &selftest_data_node);
|
|
|
|
/* attach the sub-tree to live tree */
|
|
return attach_node_and_children(selftest_data_node);
|
|
}
|
|
|
|
/**
|
|
* detach_node_and_children - detaches node
|
|
* and its children from live tree
|
|
*
|
|
* @np: Node to detach from live tree
|
|
*/
|
|
static void detach_node_and_children(struct device_node *np)
|
|
{
|
|
while (np->child)
|
|
detach_node_and_children(np->child);
|
|
|
|
while (np->sibling)
|
|
detach_node_and_children(np->sibling);
|
|
|
|
of_detach_node(np);
|
|
}
|
|
|
|
/**
|
|
* selftest_data_remove - removes the selftest data
|
|
* nodes from the live tree
|
|
*/
|
|
static void selftest_data_remove(void)
|
|
{
|
|
struct device_node *np;
|
|
struct property *prop;
|
|
|
|
while (last_node_index >= 0) {
|
|
if (nodes[last_node_index]) {
|
|
np = of_find_node_by_path(nodes[last_node_index]->full_name);
|
|
if (strcmp(np->full_name, "/aliases") != 0) {
|
|
detach_node_and_children(np->child);
|
|
of_detach_node(np);
|
|
} else {
|
|
for_each_property_of_node(np, prop) {
|
|
if (strcmp(prop->name, "testcase-alias") == 0)
|
|
of_remove_property(np, prop);
|
|
}
|
|
}
|
|
}
|
|
last_node_index--;
|
|
}
|
|
}
|
|
|
|
static int __init of_selftest(void)
|
|
{
|
|
struct device_node *np;
|
|
int res;
|
|
|
|
/* adding data for selftest */
|
|
res = selftest_data_add();
|
|
if (res)
|
|
return res;
|
|
|
|
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);
|
|
|
|
/* removing selftest data from live tree */
|
|
selftest_data_remove();
|
|
|
|
return 0;
|
|
}
|
|
late_initcall(of_selftest);
|