@@ -739,6 +739,17 @@ int device_get_child_count(const struct udevice *parent)
return count;
}
+int device_get_decendent_count(const struct udevice *parent)
+{
+ const struct udevice *dev;
+ int count = 1;
+
+ list_for_each_entry(dev, &parent->child_head, sibling_node)
+ count += device_get_decendent_count(dev);
+
+ return count;
+}
+
int device_find_child_by_seq(const struct udevice *parent, int seq,
struct udevice **devp)
{
@@ -26,6 +26,7 @@
#include <dm/read.h>
#include <dm/root.h>
#include <dm/uclass.h>
+#include <dm/uclass-internal.h>
#include <dm/util.h>
#include <linux/list.h>
@@ -407,6 +408,12 @@ int dm_init_and_scan(bool pre_reloc_only)
return 0;
}
+void dm_get_stats(int *device_countp, int *uclass_countp)
+{
+ *device_countp = device_get_decendent_count(gd->dm_root);
+ *uclass_countp = uclass_get_count();
+}
+
#ifdef CONFIG_ACPIGEN
static int root_acpi_get_name(const struct udevice *dev, char *out_name)
{
@@ -643,6 +643,19 @@ int uclass_next_device_check(struct udevice **devp)
return device_probe(*devp);
}
+int uclass_get_count(void)
+{
+ const struct uclass *uc;
+ int count = 0;
+
+ if (gd->dm_root) {
+ list_for_each_entry(uc, gd->uclass_root, sibling_node)
+ count++;
+ }
+
+ return count;
+}
+
int uclass_first_device_drvdata(enum uclass_id id, ulong driver_data,
struct udevice **devp)
{
@@ -593,7 +593,7 @@ int device_get_child(const struct udevice *parent, int index,
struct udevice **devp);
/**
- * device_get_child_count() - Get the available child count of a device
+ * device_get_child_count() - Get the child count of a device
*
* Returns the number of children to a device.
*
@@ -601,6 +601,15 @@ int device_get_child(const struct udevice *parent, int index,
*/
int device_get_child_count(const struct udevice *parent);
+/**
+ * device_get_decendent_count() - Get the total number of decendents of a device
+ *
+ * Returns the total number of decendents, including all children
+ *
+ * @parent: Parent device to check
+ */
+int device_get_decendent_count(const struct udevice *parent);
+
/**
* device_find_child_by_seq() - Find a child device based on a sequence
*
@@ -131,4 +131,12 @@ int dm_remove_devices_flags(uint flags);
static inline int dm_remove_devices_flags(uint flags) { return 0; }
#endif
+/**
+ * dm_get_stats() - Get some stats for driver mode
+ *
+ * @device_countp: Returns total number of devices that are bound
+ * @uclass_countp: Returns total number of uclasses in use
+ */
+void dm_get_stats(int *device_countp, int *uclass_countp);
+
#endif
@@ -306,6 +306,13 @@ int uclass_pre_remove_device(struct udevice *dev);
static inline int uclass_pre_remove_device(struct udevice *dev) { return 0; }
#endif
+/**
+ * uclass_get_count() - Get the number of uclasses
+ *
+ * Returns the number of uclasses instantiated in driver model
+ */
+int uclass_get_count(void);
+
/**
* uclass_find() - Find uclass by its id
*
@@ -307,11 +307,15 @@ static int dm_test_lifecycle(struct unit_test_state *uts)
{
int op_count[DM_TEST_OP_COUNT];
struct udevice *dev, *test_dev;
+ int start_dev_count, start_uc_count;
+ int dev_count, uc_count;
int pingret;
int ret;
memcpy(op_count, dm_testdrv_op_count, sizeof(op_count));
+ dm_get_stats(&start_dev_count, &start_uc_count);
+
ut_assertok(device_bind_by_name(uts->root, false, &driver_info_manual,
&dev));
ut_assert(dev);
@@ -319,6 +323,11 @@ static int dm_test_lifecycle(struct unit_test_state *uts)
== op_count[DM_TEST_OP_BIND] + 1);
ut_assert(!dev_get_priv(dev));
+ /* We should have one more device */
+ dm_get_stats(&dev_count, &uc_count);
+ ut_asserteq(start_dev_count + 1, dev_count);
+ ut_asserteq(start_uc_count, uc_count);
+
/* Probe the device - it should fail allocating private data */
uts->force_fail_alloc = 1;
ret = device_probe(dev);
@@ -353,6 +362,11 @@ static int dm_test_lifecycle(struct unit_test_state *uts)
ut_asserteq(1, dm_testdrv_op_count[DM_TEST_OP_UNBIND]);
ut_asserteq(1, dm_testdrv_op_count[DM_TEST_OP_PRE_UNBIND]);
+ /* We should have one less device */
+ dm_get_stats(&dev_count, &uc_count);
+ ut_asserteq(start_dev_count, dev_count);
+ ut_asserteq(start_uc_count, uc_count);
+
return 0;
}
DM_TEST(dm_test_lifecycle, UT_TESTF_SCAN_PDATA | UT_TESTF_PROBE_TEST);
@@ -526,17 +540,31 @@ DM_TEST(dm_test_leak, 0);
/* Test uclass init/destroy methods */
static int dm_test_uclass(struct unit_test_state *uts)
{
+ int dev_count, uc_count;
struct uclass *uc;
+ /* We should have just the root device and uclass */
+ dm_get_stats(&dev_count, &uc_count);
+ ut_asserteq(1, dev_count);
+ ut_asserteq(1, uc_count);
+
ut_assertok(uclass_get(UCLASS_TEST, &uc));
ut_asserteq(1, dm_testdrv_op_count[DM_TEST_OP_INIT]);
ut_asserteq(0, dm_testdrv_op_count[DM_TEST_OP_DESTROY]);
ut_assert(uclass_get_priv(uc));
+ dm_get_stats(&dev_count, &uc_count);
+ ut_asserteq(1, dev_count);
+ ut_asserteq(2, uc_count);
+
ut_assertok(uclass_destroy(uc));
ut_asserteq(1, dm_testdrv_op_count[DM_TEST_OP_INIT]);
ut_asserteq(1, dm_testdrv_op_count[DM_TEST_OP_DESTROY]);
+ dm_get_stats(&dev_count, &uc_count);
+ ut_asserteq(1, dev_count);
+ ut_asserteq(1, uc_count);
+
return 0;
}
DM_TEST(dm_test_uclass, 0);
@@ -1217,3 +1245,16 @@ static int dm_test_dma_offset(struct unit_test_state *uts)
}
DM_TEST(dm_test_dma_offset, UT_TESTF_SCAN_PDATA | UT_TESTF_SCAN_FDT);
#endif
+
+/* Test dm_get_stats() */
+static int dm_test_get_stats(struct unit_test_state *uts)
+{
+ int dev_count, uc_count;
+
+ dm_get_stats(&dev_count, &uc_count);
+ ut_assert(dev_count > 50);
+ ut_assert(uc_count > 30);
+
+ return 0;
+}
+DM_TEST(dm_test_get_stats, UT_TESTF_SCAN_FDT);
Add a function that returns some basic stats about driver model. For now we only have two. Signed-off-by: Simon Glass <sjg@chromium.org> --- (no changes since v1) drivers/core/device.c | 11 ++++++++++ drivers/core/root.c | 7 ++++++ drivers/core/uclass.c | 13 ++++++++++++ include/dm/device.h | 11 +++++++++- include/dm/root.h | 8 +++++++ include/dm/uclass-internal.h | 7 ++++++ test/dm/core.c | 41 ++++++++++++++++++++++++++++++++++++ 7 files changed, 97 insertions(+), 1 deletion(-)