#include <linux/errno.h>
#include <linux/module.h>
#include <linux/of.h>
+#include <linux/of_fdt.h>
#include <linux/of_irq.h>
#include <linux/of_platform.h>
#include <linux/list.h>
#include <linux/slab.h>
#include <linux/device.h>
+#include "of_private.h"
+
static struct selftest_results {
int passed;
int failed;
} selftest_results;
+#define NO_OF_NODES 2
+static struct device_node *nodes[NO_OF_NODES];
+static int last_node_index;
+static bool selftest_live_tree;
+
#define selftest(result, fmt, ...) { \
if (!(result)) { \
selftest_results.failed++; \
selftest(rc == -EILSEQ, "unterminated string; rc=%i", rc);
}
+#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_selftest_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);
+ selftest(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);
+ selftest(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_selftest_changeset(void)
+{
+#ifdef CONFIG_OF_DYNAMIC
+ struct property *ppadd, padd = { .name = "prop-add", .length = 0, .value = "" };
+ struct property *ppupdate, pupdate = { .name = "prop-update", .length = 5, .value = "abcd" };
+ struct property *ppremove;
+ struct device_node *n1, *n2, *n21, *nremove, *parent;
+ struct of_changeset chgset;
+
+ of_changeset_init(&chgset);
+ n1 = __of_node_alloc("/testcase-data/changeset/n1", GFP_KERNEL);
+ selftest(n1, "testcase setup failure\n");
+ n2 = __of_node_alloc("/testcase-data/changeset/n2", GFP_KERNEL);
+ selftest(n2, "testcase setup failure\n");
+ n21 = __of_node_alloc("/testcase-data/changeset/n2/n21", GFP_KERNEL);
+ selftest(n21, "testcase setup failure %p\n", n21);
+ nremove = of_find_node_by_path("/testcase-data/changeset/node-remove");
+ selftest(nremove, "testcase setup failure\n");
+ ppadd = __of_prop_dup(&padd, GFP_KERNEL);
+ selftest(ppadd, "testcase setup failure\n");
+ ppupdate = __of_prop_dup(&pupdate, GFP_KERNEL);
+ selftest(ppupdate, "testcase setup failure\n");
+ parent = nremove->parent;
+ n1->parent = parent;
+ n2->parent = parent;
+ n21->parent = n2;
+ n2->child = n21;
+ ppremove = of_find_property(parent, "prop-remove", NULL);
+ selftest(ppremove, "failed to find removal prop");
+
+ of_changeset_init(&chgset);
+ selftest(!of_changeset_attach_node(&chgset, n1), "fail attach n1\n");
+ selftest(!of_changeset_attach_node(&chgset, n2), "fail attach n2\n");
+ selftest(!of_changeset_detach_node(&chgset, nremove), "fail remove node\n");
+ selftest(!of_changeset_attach_node(&chgset, n21), "fail attach n21\n");
+ selftest(!of_changeset_add_property(&chgset, parent, ppadd), "fail add prop\n");
+ selftest(!of_changeset_update_property(&chgset, parent, ppupdate), "fail update prop\n");
+ selftest(!of_changeset_remove_property(&chgset, parent, ppremove), "fail remove prop\n");
+ mutex_lock(&of_mutex);
+ selftest(!of_changeset_apply(&chgset), "apply failed\n");
+ mutex_unlock(&of_mutex);
+
+ mutex_lock(&of_mutex);
+ selftest(!of_changeset_revert(&chgset), "revert failed\n");
+ mutex_unlock(&of_mutex);
+
+ of_changeset_destroy(&chgset);
+#endif
+}
+
static void __init of_selftest_parse_interrupts(void)
{
struct device_node *np;
}
}
+/**
+ * update_node_properties - adds the properties
+ * of np into dup node (present in live tree) and
+ * updates parent of children of np to dup.
+ *
+ * @np: node already present in live tree
+ * @dup: node present in live tree to be updated
+ */
+static void update_node_properties(struct device_node *np,
+ struct device_node *dup)
+{
+ struct property *prop;
+ struct device_node *child;
+
+ for_each_property_of_node(np, prop)
+ of_add_property(dup, prop);
+
+ for_each_child_of_node(np, child)
+ child->parent = dup;
+}
+
+/**
+ * attach_node_and_children - attaches nodes
+ * and its children to live tree
+ *
+ * @np: Node to attach to live tree
+ */
+static int attach_node_and_children(struct device_node *np)
+{
+ struct device_node *next, *root = np, *dup;
+
+ /* 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, *np;
+ extern uint8_t __dtb_testcases_begin[];
+ extern uint8_t __dtb_testcases_end[];
+ const int size = __dtb_testcases_end - __dtb_testcases_begin;
+
+ if (!size) {
+ 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);
+ if (!selftest_data_node) {
+ pr_warn("%s: No tree to attach; not running tests\n", __func__);
+ return -ENODATA;
+ }
+
+ if (!of_allnodes) {
+ /* enabling flag for removing nodes */
+ selftest_live_tree = true;
+ of_allnodes = selftest_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");
+ return 0;
+ }
+
+ /* 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;
+
+ if (selftest_live_tree) {
+ of_node_put(of_aliases);
+ of_node_put(of_chosen);
+ of_aliases = NULL;
+ of_chosen = NULL;
+ for_each_child_of_node(of_allnodes, np)
+ detach_node_and_children(np);
+ __of_detach_node_sysfs(of_allnodes);
+ of_allnodes = NULL;
+ return;
+ }
+
+ 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) {
of_selftest_dynamic();
of_selftest_parse_phandle_with_args();
of_selftest_property_match_string();
+ of_selftest_property_copy();
+ of_selftest_changeset();
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);
projects / cascardo / linux.git / blobdiff