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-rw-r--r--drivers/base/Kconfig2
-rw-r--r--drivers/base/arch_topology.c300
-rw-r--r--drivers/base/base.h1
-rw-r--r--drivers/base/bus.c24
-rw-r--r--drivers/base/core.c234
-rw-r--r--drivers/base/devcon.c51
-rw-r--r--drivers/base/devcoredump.c13
-rw-r--r--drivers/base/devtmpfs.c38
-rw-r--r--drivers/base/memory.c47
-rw-r--r--drivers/base/node.c55
-rw-r--r--drivers/base/platform.c160
-rw-r--r--drivers/base/power/Makefile2
-rw-r--r--drivers/base/power/domain.c25
-rw-r--r--drivers/base/power/main.c35
-rw-r--r--drivers/base/power/power.h18
-rw-r--r--drivers/base/power/qos.c70
-rw-r--r--drivers/base/power/runtime.c19
-rw-r--r--drivers/base/power/sysfs.c6
-rw-r--r--drivers/base/power/wakeup.c72
-rw-r--r--drivers/base/power/wakeup_stats.c214
-rw-r--r--drivers/base/regmap/Kconfig2
-rw-r--r--drivers/base/regmap/regmap-debugfs.c12
-rw-r--r--drivers/base/regmap/regmap-irq.c7
-rw-r--r--drivers/base/soc.c9
-rw-r--r--drivers/base/swnode.c39
25 files changed, 1052 insertions, 403 deletions
diff --git a/drivers/base/Kconfig b/drivers/base/Kconfig
index dc404492381d..28b92e3cc570 100644
--- a/drivers/base/Kconfig
+++ b/drivers/base/Kconfig
@@ -202,7 +202,7 @@ config GENERIC_ARCH_TOPOLOGY
help
Enable support for architectures common topology code: e.g., parsing
CPU capacity information from DT, usage of such information for
- appropriate scaling, sysfs interface for changing capacity values at
+ appropriate scaling, sysfs interface for reading capacity values at
runtime.
endmenu
diff --git a/drivers/base/arch_topology.c b/drivers/base/arch_topology.c
index 63c1e76739f1..1eb81f113786 100644
--- a/drivers/base/arch_topology.c
+++ b/drivers/base/arch_topology.c
@@ -15,6 +15,11 @@
#include <linux/string.h>
#include <linux/sched/topology.h>
#include <linux/cpuset.h>
+#include <linux/cpumask.h>
+#include <linux/init.h>
+#include <linux/percpu.h>
+#include <linux/sched.h>
+#include <linux/smp.h>
DEFINE_PER_CPU(unsigned long, freq_scale) = SCHED_CAPACITY_SCALE;
@@ -174,7 +179,7 @@ init_cpu_capacity_callback(struct notifier_block *nb,
if (!raw_capacity)
return 0;
- if (val != CPUFREQ_NOTIFY)
+ if (val != CPUFREQ_CREATE_POLICY)
return 0;
pr_debug("cpu_capacity: init cpu capacity for CPUs [%*pbl] (to_visit=%*pbl)\n",
@@ -241,3 +246,296 @@ static void parsing_done_workfn(struct work_struct *work)
#else
core_initcall(free_raw_capacity);
#endif
+
+#if defined(CONFIG_ARM64) || defined(CONFIG_RISCV)
+static int __init get_cpu_for_node(struct device_node *node)
+{
+ struct device_node *cpu_node;
+ int cpu;
+
+ cpu_node = of_parse_phandle(node, "cpu", 0);
+ if (!cpu_node)
+ return -1;
+
+ cpu = of_cpu_node_to_id(cpu_node);
+ if (cpu >= 0)
+ topology_parse_cpu_capacity(cpu_node, cpu);
+ else
+ pr_crit("Unable to find CPU node for %pOF\n", cpu_node);
+
+ of_node_put(cpu_node);
+ return cpu;
+}
+
+static int __init parse_core(struct device_node *core, int package_id,
+ int core_id)
+{
+ char name[10];
+ bool leaf = true;
+ int i = 0;
+ int cpu;
+ struct device_node *t;
+
+ do {
+ snprintf(name, sizeof(name), "thread%d", i);
+ t = of_get_child_by_name(core, name);
+ if (t) {
+ leaf = false;
+ cpu = get_cpu_for_node(t);
+ if (cpu >= 0) {
+ cpu_topology[cpu].package_id = package_id;
+ cpu_topology[cpu].core_id = core_id;
+ cpu_topology[cpu].thread_id = i;
+ } else {
+ pr_err("%pOF: Can't get CPU for thread\n",
+ t);
+ of_node_put(t);
+ return -EINVAL;
+ }
+ of_node_put(t);
+ }
+ i++;
+ } while (t);
+
+ cpu = get_cpu_for_node(core);
+ if (cpu >= 0) {
+ if (!leaf) {
+ pr_err("%pOF: Core has both threads and CPU\n",
+ core);
+ return -EINVAL;
+ }
+
+ cpu_topology[cpu].package_id = package_id;
+ cpu_topology[cpu].core_id = core_id;
+ } else if (leaf) {
+ pr_err("%pOF: Can't get CPU for leaf core\n", core);
+ return -EINVAL;
+ }
+
+ return 0;
+}
+
+static int __init parse_cluster(struct device_node *cluster, int depth)
+{
+ char name[10];
+ bool leaf = true;
+ bool has_cores = false;
+ struct device_node *c;
+ static int package_id __initdata;
+ int core_id = 0;
+ int i, ret;
+
+ /*
+ * First check for child clusters; we currently ignore any
+ * information about the nesting of clusters and present the
+ * scheduler with a flat list of them.
+ */
+ i = 0;
+ do {
+ snprintf(name, sizeof(name), "cluster%d", i);
+ c = of_get_child_by_name(cluster, name);
+ if (c) {
+ leaf = false;
+ ret = parse_cluster(c, depth + 1);
+ of_node_put(c);
+ if (ret != 0)
+ return ret;
+ }
+ i++;
+ } while (c);
+
+ /* Now check for cores */
+ i = 0;
+ do {
+ snprintf(name, sizeof(name), "core%d", i);
+ c = of_get_child_by_name(cluster, name);
+ if (c) {
+ has_cores = true;
+
+ if (depth == 0) {
+ pr_err("%pOF: cpu-map children should be clusters\n",
+ c);
+ of_node_put(c);
+ return -EINVAL;
+ }
+
+ if (leaf) {
+ ret = parse_core(c, package_id, core_id++);
+ } else {
+ pr_err("%pOF: Non-leaf cluster with core %s\n",
+ cluster, name);
+ ret = -EINVAL;
+ }
+
+ of_node_put(c);
+ if (ret != 0)
+ return ret;
+ }
+ i++;
+ } while (c);
+
+ if (leaf && !has_cores)
+ pr_warn("%pOF: empty cluster\n", cluster);
+
+ if (leaf)
+ package_id++;
+
+ return 0;
+}
+
+static int __init parse_dt_topology(void)
+{
+ struct device_node *cn, *map;
+ int ret = 0;
+ int cpu;
+
+ cn = of_find_node_by_path("/cpus");
+ if (!cn) {
+ pr_err("No CPU information found in DT\n");
+ return 0;
+ }
+
+ /*
+ * When topology is provided cpu-map is essentially a root
+ * cluster with restricted subnodes.
+ */
+ map = of_get_child_by_name(cn, "cpu-map");
+ if (!map)
+ goto out;
+
+ ret = parse_cluster(map, 0);
+ if (ret != 0)
+ goto out_map;
+
+ topology_normalize_cpu_scale();
+
+ /*
+ * Check that all cores are in the topology; the SMP code will
+ * only mark cores described in the DT as possible.
+ */
+ for_each_possible_cpu(cpu)
+ if (cpu_topology[cpu].package_id == -1)
+ ret = -EINVAL;
+
+out_map:
+ of_node_put(map);
+out:
+ of_node_put(cn);
+ return ret;
+}
+#endif
+
+/*
+ * cpu topology table
+ */
+struct cpu_topology cpu_topology[NR_CPUS];
+EXPORT_SYMBOL_GPL(cpu_topology);
+
+const struct cpumask *cpu_coregroup_mask(int cpu)
+{
+ const cpumask_t *core_mask = cpumask_of_node(cpu_to_node(cpu));
+
+ /* Find the smaller of NUMA, core or LLC siblings */
+ if (cpumask_subset(&cpu_topology[cpu].core_sibling, core_mask)) {
+ /* not numa in package, lets use the package siblings */
+ core_mask = &cpu_topology[cpu].core_sibling;
+ }
+ if (cpu_topology[cpu].llc_id != -1) {
+ if (cpumask_subset(&cpu_topology[cpu].llc_sibling, core_mask))
+ core_mask = &cpu_topology[cpu].llc_sibling;
+ }
+
+ return core_mask;
+}
+
+void update_siblings_masks(unsigned int cpuid)
+{
+ struct cpu_topology *cpu_topo, *cpuid_topo = &cpu_topology[cpuid];
+ int cpu;
+
+ /* update core and thread sibling masks */
+ for_each_online_cpu(cpu) {
+ cpu_topo = &cpu_topology[cpu];
+
+ if (cpuid_topo->llc_id == cpu_topo->llc_id) {
+ cpumask_set_cpu(cpu, &cpuid_topo->llc_sibling);
+ cpumask_set_cpu(cpuid, &cpu_topo->llc_sibling);
+ }
+
+ if (cpuid_topo->package_id != cpu_topo->package_id)
+ continue;
+
+ cpumask_set_cpu(cpuid, &cpu_topo->core_sibling);
+ cpumask_set_cpu(cpu, &cpuid_topo->core_sibling);
+
+ if (cpuid_topo->core_id != cpu_topo->core_id)
+ continue;
+
+ cpumask_set_cpu(cpuid, &cpu_topo->thread_sibling);
+ cpumask_set_cpu(cpu, &cpuid_topo->thread_sibling);
+ }
+}
+
+static void clear_cpu_topology(int cpu)
+{
+ struct cpu_topology *cpu_topo = &cpu_topology[cpu];
+
+ cpumask_clear(&cpu_topo->llc_sibling);
+ cpumask_set_cpu(cpu, &cpu_topo->llc_sibling);
+
+ cpumask_clear(&cpu_topo->core_sibling);
+ cpumask_set_cpu(cpu, &cpu_topo->core_sibling);
+ cpumask_clear(&cpu_topo->thread_sibling);
+ cpumask_set_cpu(cpu, &cpu_topo->thread_sibling);
+}
+
+void __init reset_cpu_topology(void)
+{
+ unsigned int cpu;
+
+ for_each_possible_cpu(cpu) {
+ struct cpu_topology *cpu_topo = &cpu_topology[cpu];
+
+ cpu_topo->thread_id = -1;
+ cpu_topo->core_id = -1;
+ cpu_topo->package_id = -1;
+ cpu_topo->llc_id = -1;
+
+ clear_cpu_topology(cpu);
+ }
+}
+
+void remove_cpu_topology(unsigned int cpu)
+{
+ int sibling;
+
+ for_each_cpu(sibling, topology_core_cpumask(cpu))
+ cpumask_clear_cpu(cpu, topology_core_cpumask(sibling));
+ for_each_cpu(sibling, topology_sibling_cpumask(cpu))
+ cpumask_clear_cpu(cpu, topology_sibling_cpumask(sibling));
+ for_each_cpu(sibling, topology_llc_cpumask(cpu))
+ cpumask_clear_cpu(cpu, topology_llc_cpumask(sibling));
+
+ clear_cpu_topology(cpu);
+}
+
+__weak int __init parse_acpi_topology(void)
+{
+ return 0;
+}
+
+#if defined(CONFIG_ARM64) || defined(CONFIG_RISCV)
+void __init init_cpu_topology(void)
+{
+ reset_cpu_topology();
+
+ /*
+ * Discard anything that was parsed if we hit an error so we
+ * don't use partial information.
+ */
+ if (parse_acpi_topology())
+ reset_cpu_topology();
+ else if (of_have_populated_dt() && parse_dt_topology())
+ reset_cpu_topology();
+}
+#endif
diff --git a/drivers/base/base.h b/drivers/base/base.h
index b405436ee28e..0d32544b6f91 100644
--- a/drivers/base/base.h
+++ b/drivers/base/base.h
@@ -165,6 +165,7 @@ static inline int devtmpfs_init(void) { return 0; }
/* Device links support */
extern int device_links_read_lock(void);
extern void device_links_read_unlock(int idx);
+extern int device_links_read_lock_held(void);
extern int device_links_check_suppliers(struct device *dev);
extern void device_links_driver_bound(struct device *dev);
extern void device_links_driver_cleanup(struct device *dev);
diff --git a/drivers/base/bus.c b/drivers/base/bus.c
index df3cac739813..a1d1e8256324 100644
--- a/drivers/base/bus.c
+++ b/drivers/base/bus.c
@@ -342,30 +342,6 @@ struct device *bus_find_device(struct bus_type *bus,
}
EXPORT_SYMBOL_GPL(bus_find_device);
-static int match_name(struct device *dev, const void *data)
-{
- const char *name = data;
-
- return sysfs_streq(name, dev_name(dev));
-}
-
-/**
- * bus_find_device_by_name - device iterator for locating a particular device of a specific name
- * @bus: bus type
- * @start: Device to begin with
- * @name: name of the device to match
- *
- * This is similar to the bus_find_device() function above, but it handles
- * searching by a name automatically, no need to write another strcmp matching
- * function.
- */
-struct device *bus_find_device_by_name(struct bus_type *bus,
- struct device *start, const char *name)
-{
- return bus_find_device(bus, start, (void *)name, match_name);
-}
-EXPORT_SYMBOL_GPL(bus_find_device_by_name);
-
/**
* subsys_find_device_by_id - find a device with a specific enumeration number
* @subsys: subsystem
diff --git a/drivers/base/core.c b/drivers/base/core.c
index 1669d41fcddc..7bd9cd366d41 100644
--- a/drivers/base/core.c
+++ b/drivers/base/core.c
@@ -9,6 +9,7 @@
*/
#include <linux/acpi.h>
+#include <linux/cpufreq.h>
#include <linux/device.h>
#include <linux/err.h>
#include <linux/fwnode.h>
@@ -68,6 +69,11 @@ void device_links_read_unlock(int idx)
{
srcu_read_unlock(&device_links_srcu, idx);
}
+
+int device_links_read_lock_held(void)
+{
+ return srcu_read_lock_held(&device_links_srcu);
+}
#else /* !CONFIG_SRCU */
static DECLARE_RWSEM(device_links_lock);
@@ -91,6 +97,13 @@ void device_links_read_unlock(int not_used)
{
up_read(&device_links_lock);
}
+
+#ifdef CONFIG_DEBUG_LOCK_ALLOC
+int device_links_read_lock_held(void)
+{
+ return lockdep_is_held(&device_links_lock);
+}
+#endif
#endif /* !CONFIG_SRCU */
/**
@@ -124,6 +137,50 @@ static int device_is_dependent(struct device *dev, void *target)
return ret;
}
+static void device_link_init_status(struct device_link *link,
+ struct device *consumer,
+ struct device *supplier)
+{
+ switch (supplier->links.status) {
+ case DL_DEV_PROBING:
+ switch (consumer->links.status) {
+ case DL_DEV_PROBING:
+ /*
+ * A consumer driver can create a link to a supplier
+ * that has not completed its probing yet as long as it
+ * knows that the supplier is already functional (for
+ * example, it has just acquired some resources from the
+ * supplier).
+ */
+ link->status = DL_STATE_CONSUMER_PROBE;
+ break;
+ default:
+ link->status = DL_STATE_DORMANT;
+ break;
+ }
+ break;
+ case DL_DEV_DRIVER_BOUND:
+ switch (consumer->links.status) {
+ case DL_DEV_PROBING:
+ link->status = DL_STATE_CONSUMER_PROBE;
+ break;
+ case DL_DEV_DRIVER_BOUND:
+ link->status = DL_STATE_ACTIVE;
+ break;
+ default:
+ link->status = DL_STATE_AVAILABLE;
+ break;
+ }
+ break;
+ case DL_DEV_UNBINDING:
+ link->status = DL_STATE_SUPPLIER_UNBIND;
+ break;
+ default:
+ link->status = DL_STATE_DORMANT;
+ break;
+ }
+}
+
static int device_reorder_to_tail(struct device *dev, void *not_used)
{
struct device_link *link;
@@ -165,6 +222,13 @@ void device_pm_move_to_tail(struct device *dev)
device_links_read_unlock(idx);
}
+#define DL_MANAGED_LINK_FLAGS (DL_FLAG_AUTOREMOVE_CONSUMER | \
+ DL_FLAG_AUTOREMOVE_SUPPLIER | \
+ DL_FLAG_AUTOPROBE_CONSUMER)
+
+#define DL_ADD_VALID_FLAGS (DL_MANAGED_LINK_FLAGS | DL_FLAG_STATELESS | \
+ DL_FLAG_PM_RUNTIME | DL_FLAG_RPM_ACTIVE)
+
/**
* device_link_add - Create a link between two devices.
* @consumer: Consumer end of the link.
@@ -179,9 +243,9 @@ void device_pm_move_to_tail(struct device *dev)
* of the link. If DL_FLAG_PM_RUNTIME is not set, DL_FLAG_RPM_ACTIVE will be
* ignored.
*
- * If DL_FLAG_STATELESS is set in @flags, the link is not going to be managed by
- * the driver core and, in particular, the caller of this function is expected
- * to drop the reference to the link acquired by it directly.
+ * If DL_FLAG_STATELESS is set in @flags, the caller of this function is
+ * expected to release the link returned by it directly with the help of either
+ * device_link_del() or device_link_remove().
*
* If that flag is not set, however, the caller of this function is handing the
* management of the link over to the driver core entirely and its return value
@@ -201,9 +265,16 @@ void device_pm_move_to_tail(struct device *dev)
* be used to request the driver core to automaticall probe for a consmer
* driver after successfully binding a driver to the supplier device.
*
- * The combination of DL_FLAG_STATELESS and either DL_FLAG_AUTOREMOVE_CONSUMER
- * or DL_FLAG_AUTOREMOVE_SUPPLIER set in @flags at the same time is invalid and
- * will cause NULL to be returned upfront.
+ * The combination of DL_FLAG_STATELESS and one of DL_FLAG_AUTOREMOVE_CONSUMER,
+ * DL_FLAG_AUTOREMOVE_SUPPLIER, or DL_FLAG_AUTOPROBE_CONSUMER set in @flags at
+ * the same time is invalid and will cause NULL to be returned upfront.
+ * However, if a device link between the given @consumer and @supplier pair
+ * exists already when this function is called for them, the existing link will
+ * be returned regardless of its current type and status (the link's flags may
+ * be modified then). The caller of this function is then expected to treat
+ * the link as though it has just been created, so (in particular) if
+ * DL_FLAG_STATELESS was passed in @flags, the link needs to be released
+ * explicitly when not needed any more (as stated above).
*
* A side effect of the link creation is re-ordering of dpm_list and the
* devices_kset list by moving the consumer device and all devices depending
@@ -219,11 +290,8 @@ struct device_link *device_link_add(struct device *consumer,
{
struct device_link *link;
- if (!consumer || !supplier ||
- (flags & DL_FLAG_STATELESS &&
- flags & (DL_FLAG_AUTOREMOVE_CONSUMER |
- DL_FLAG_AUTOREMOVE_SUPPLIER |
- DL_FLAG_AUTOPROBE_CONSUMER)) ||
+ if (!consumer || !supplier || flags & ~DL_ADD_VALID_FLAGS ||
+ (flags & DL_FLAG_STATELESS && flags & DL_MANAGED_LINK_FLAGS) ||
(flags & DL_FLAG_AUTOPROBE_CONSUMER &&
flags & (DL_FLAG_AUTOREMOVE_CONSUMER |
DL_FLAG_AUTOREMOVE_SUPPLIER)))
@@ -236,6 +304,9 @@ struct device_link *device_link_add(struct device *consumer,
}
}
+ if (!(flags & DL_FLAG_STATELESS))
+ flags |= DL_FLAG_MANAGED;
+
device_links_write_lock();
device_pm_lock();
@@ -262,15 +333,6 @@ struct device_link *device_link_add(struct device *consumer,
if (link->consumer != consumer)
continue;
- /*
- * Don't return a stateless link if the caller wants a stateful
- * one and vice versa.
- */
- if (WARN_ON((flags & DL_FLAG_STATELESS) != (link->flags & DL_FLAG_STATELESS))) {
- link = NULL;
- goto out;
- }
-
if (flags & DL_FLAG_PM_RUNTIME) {
if (!(link->flags & DL_FLAG_PM_RUNTIME)) {
pm_runtime_new_link(consumer);
@@ -281,6 +343,7 @@ struct device_link *device_link_add(struct device *consumer,
}
if (flags & DL_FLAG_STATELESS) {
+ link->flags |= DL_FLAG_STATELESS;
kref_get(&link->kref);
goto out;
}
@@ -299,6 +362,11 @@ struct device_link *device_link_add(struct device *consumer,
link->flags &= ~(DL_FLAG_AUTOREMOVE_CONSUMER |
DL_FLAG_AUTOREMOVE_SUPPLIER);
}
+ if (!(link->flags & DL_FLAG_MANAGED)) {
+ kref_get(&link->kref);
+ link->flags |= DL_FLAG_MANAGED;
+ device_link_init_status(link, consumer, supplier);
+ }
goto out;
}
@@ -325,48 +393,10 @@ struct device_link *device_link_add(struct device *consumer,
kref_init(&link->kref);
/* Determine the initial link state. */
- if (flags & DL_FLAG_STATELESS) {
+ if (flags & DL_FLAG_STATELESS)
link->status = DL_STATE_NONE;
- } else {
- switch (supplier->links.status) {
- case DL_DEV_PROBING:
- switch (consumer->links.status) {
- case DL_DEV_PROBING:
- /*
- * A consumer driver can create a link to a
- * supplier that has not completed its probing
- * yet as long as it knows that the supplier is
- * already functional (for example, it has just
- * acquired some resources from the supplier).
- */
- link->status = DL_STATE_CONSUMER_PROBE;
- break;
- default:
- link->status = DL_STATE_DORMANT;
- break;
- }
- break;
- case DL_DEV_DRIVER_BOUND:
- switch (consumer->links.status) {
- case DL_DEV_PROBING:
- link->status = DL_STATE_CONSUMER_PROBE;
- break;
- case DL_DEV_DRIVER_BOUND:
- link->status = DL_STATE_ACTIVE;
- break;
- default:
- link->status = DL_STATE_AVAILABLE;
- break;
- }
- break;
- case DL_DEV_UNBINDING:
- link->status = DL_STATE_SUPPLIER_UNBIND;
- break;
- default:
- link->status = DL_STATE_DORMANT;
- break;
- }
- }
+ else
+ device_link_init_status(link, consumer, supplier);
/*
* Some callers expect the link creation during consumer driver probe to
@@ -528,7 +558,7 @@ static void device_links_missing_supplier(struct device *dev)
* mark the link as "consumer probe in progress" to make the supplier removal
* wait for us to complete (or bad things may happen).
*
- * Links with the DL_FLAG_STATELESS flag set are ignored.
+ * Links without the DL_FLAG_MANAGED flag set are ignored.
*/
int device_links_check_suppliers(struct device *dev)
{
@@ -538,7 +568,7 @@ int device_links_check_suppliers(struct device *dev)
device_links_write_lock();
list_for_each_entry(link, &dev->links.suppliers, c_node) {
- if (link->flags & DL_FLAG_STATELESS)
+ if (!(link->flags & DL_FLAG_MANAGED))
continue;
if (link->status != DL_STATE_AVAILABLE) {
@@ -563,7 +593,7 @@ int device_links_check_suppliers(struct device *dev)
*
* Also change the status of @dev's links to suppliers to "active".
*
- * Links with the DL_FLAG_STATELESS flag set are ignored.
+ * Links without the DL_FLAG_MANAGED flag set are ignored.
*/
void device_links_driver_bound(struct device *dev)
{
@@ -572,7 +602,7 @@ void device_links_driver_bound(struct device *dev)
device_links_write_lock();
list_for_each_entry(link, &dev->links.consumers, s_node) {
- if (link->flags & DL_FLAG_STATELESS)
+ if (!(link->flags & DL_FLAG_MANAGED))
continue;
/*
@@ -593,7 +623,7 @@ void device_links_driver_bound(struct device *dev)
}
list_for_each_entry(link, &dev->links.suppliers, c_node) {
- if (link->flags & DL_FLAG_STATELESS)
+ if (!(link->flags & DL_FLAG_MANAGED))
continue;
WARN_ON(link->status != DL_STATE_CONSUMER_PROBE);
@@ -605,6 +635,13 @@ void device_links_driver_bound(struct device *dev)
device_links_write_unlock();
}
+static void device_link_drop_managed(struct device_link *link)
+{
+ link->flags &= ~DL_FLAG_MANAGED;
+ WRITE_ONCE(link->status, DL_STATE_NONE);
+ kref_put(&link->kref, __device_link_del);
+}
+
/**
* __device_links_no_driver - Update links of a device without a driver.
* @dev: Device without a drvier.
@@ -615,18 +652,18 @@ void device_links_driver_bound(struct device *dev)
* unless they already are in the "supplier unbind in progress" state in which
* case they need not be updated.
*
- * Links with the DL_FLAG_STATELESS flag set are ignored.
+ * Links without the DL_FLAG_MANAGED flag set are ignored.
*/
static void __device_links_no_driver(struct device *dev)
{
struct device_link *link, *ln;
list_for_each_entry_safe_reverse(link, ln, &dev->links.suppliers, c_node) {
- if (link->flags & DL_FLAG_STATELESS)
+ if (!(link->flags & DL_FLAG_MANAGED))
continue;
if (link->flags & DL_FLAG_AUTOREMOVE_CONSUMER)
- __device_link_del(&link->kref);
+ device_link_drop_managed(link);
else if (link->status == DL_STATE_CONSUMER_PROBE ||
link->status == DL_STATE_ACTIVE)
WRITE_ONCE(link->status, DL_STATE_AVAILABLE);
@@ -643,7 +680,7 @@ static void __device_links_no_driver(struct device *dev)
* %__device_links_no_driver() to update links to suppliers for it as
* appropriate.
*
- * Links with the DL_FLAG_STATELESS flag set are ignored.
+ * Links without the DL_FLAG_MANAGED flag set are ignored.
*/
void device_links_no_driver(struct device *dev)
{
@@ -652,7 +689,7 @@ void device_links_no_driver(struct device *dev)
device_links_write_lock();
list_for_each_entry(link, &dev->links.consumers, s_node) {
- if (link->flags & DL_FLAG_STATELESS)
+ if (!(link->flags & DL_FLAG_MANAGED))
continue;
/*
@@ -680,7 +717,7 @@ void device_links_no_driver(struct device *dev)
* invoke %__device_links_no_driver() to update links to suppliers for it as
* appropriate.
*
- * Links with the DL_FLAG_STATELESS flag set are ignored.
+ * Links without the DL_FLAG_MANAGED flag set are ignored.
*/
void device_links_driver_cleanup(struct device *dev)
{
@@ -689,7 +726,7 @@ void device_links_driver_cleanup(struct device *dev)
device_links_write_lock();
list_for_each_entry_safe(link, ln, &dev->links.consumers, s_node) {
- if (link->flags & DL_FLAG_STATELESS)
+ if (!(link->flags & DL_FLAG_MANAGED))
continue;
WARN_ON(link->flags & DL_FLAG_AUTOREMOVE_CONSUMER);
@@ -702,7 +739,7 @@ void device_links_driver_cleanup(struct device *dev)
*/
if (link->status == DL_STATE_SUPPLIER_UNBIND &&
link->flags & DL_FLAG_AUTOREMOVE_SUPPLIER)
- __device_link_del(&link->kref);
+ device_link_drop_managed(link);
WRITE_ONCE(link->status, DL_STATE_DORMANT);
}
@@ -724,7 +761,7 @@ void device_links_driver_cleanup(struct device *dev)
*
* Return 'false' if there are no probing or active consumers.
*
- * Links with the DL_FLAG_STATELESS flag set are ignored.
+ * Links without the DL_FLAG_MANAGED flag set are ignored.
*/
bool device_links_busy(struct device *dev)
{
@@ -734,7 +771,7 @@ bool device_links_busy(struct device *dev)
device_links_write_lock();
list_for_each_entry(link, &dev->links.consumers, s_node) {
- if (link->flags & DL_FLAG_STATELESS)
+ if (!(link->flags & DL_FLAG_MANAGED))
continue;
if (link->status == DL_STATE_CONSUMER_PROBE
@@ -764,7 +801,7 @@ bool device_links_busy(struct device *dev)
* driver to unbind and start over (the consumer will not re-probe as we have
* changed the state of the link already).
*
- * Links with the DL_FLAG_STATELESS flag set are ignored.
+ * Links without the DL_FLAG_MANAGED flag set are ignored.
*/
void device_links_unbind_consumers(struct device *dev)
{
@@ -776,7 +813,7 @@ void device_links_unbind_consumers(struct device *dev)
list_for_each_entry(link, &dev->links.consumers, s_node) {
enum device_link_state status;
- if (link->flags & DL_FLAG_STATELESS)
+ if (!(link->flags & DL_FLAG_MANAGED))
continue;
status = link->status;
@@ -2932,13 +2969,6 @@ struct device *device_create_with_groups(struct class *class,
}
EXPORT_SYMBOL_GPL(device_create_with_groups);
-static int __match_devt(struct device *dev, const void *data)
-{
- const dev_t *devt = data;
-
- return dev->devt == *devt;
-}
-
/**
* device_destroy - removes a device that was created with device_create()
* @class: pointer to the struct class that this device was registered with
@@ -2951,7 +2981,7 @@ void device_destroy(struct class *class, dev_t devt)
{
struct device *dev;
- dev = class_find_device(class, NULL, &devt, __match_devt);
+ dev = class_find_device_by_devt(class, devt);
if (dev) {
put_device(dev);
device_unregister(dev);
@@ -3150,6 +3180,8 @@ void device_shutdown(void)
wait_for_device_probe();
device_block_probing();
+ cpufreq_suspend();
+
spin_lock(&devices_kset->list_lock);
/*
* Walk the devices list backward, shutting down each in turn.
@@ -3422,8 +3454,38 @@ void device_set_of_node_from_dev(struct device *dev, const struct device *dev2)
}
EXPORT_SYMBOL_GPL(device_set_of_node_from_dev);
+int device_match_name(struct device *dev, const void *name)
+{
+ return sysfs_streq(dev_name(dev), name);
+}
+EXPORT_SYMBOL_GPL(device_match_name);
+
int device_match_of_node(struct device *dev, const void *np)
{
return dev->of_node == np;
}
EXPORT_SYMBOL_GPL(device_match_of_node);
+
+int device_match_fwnode(struct device *dev, const void *fwnode)
+{
+ return dev_fwnode(dev) == fwnode;
+}
+EXPORT_SYMBOL_GPL(device_match_fwnode);
+
+int device_match_devt(struct device *dev, const void *pdevt)
+{
+ return dev->devt == *(dev_t *)pdevt;
+}
+EXPORT_SYMBOL_GPL(device_match_devt);
+
+int device_match_acpi_dev(struct device *dev, const void *adev)
+{
+ return ACPI_COMPANION(dev) == adev;
+}
+EXPORT_SYMBOL(device_match_acpi_dev);
+
+int device_match_any(struct device *dev, const void *unused)
+{
+ return 1;
+}
+EXPORT_SYMBOL_GPL(device_match_any);
diff --git a/drivers/base/devcon.c b/drivers/base/devcon.c
index 09f28479b243..14e2178e09f8 100644
--- a/drivers/base/devcon.c
+++ b/drivers/base/devcon.c
@@ -12,9 +12,6 @@
static DEFINE_MUTEX(devcon_lock);
static LIST_HEAD(devcon_list);
-typedef void *(*devcon_match_fn_t)(struct device_connection *con, int ep,
- void *data);
-
static void *
fwnode_graph_devcon_match(struct fwnode_handle *fwnode, const char *con_id,
void *data, devcon_match_fn_t match)
@@ -61,6 +58,34 @@ fwnode_devcon_match(struct fwnode_handle *fwnode, const char *con_id,
}
/**
+ * fwnode_connection_find_match - Find connection from a device node
+ * @fwnode: Device node with the connection
+ * @con_id: Identifier for the connection
+ * @data: Data for the match function
+ * @match: Function to check and convert the connection description
+ *
+ * Find a connection with unique identifier @con_id between @fwnode and another
+ * device node. @match will be used to convert the connection description to
+ * data the caller is expecting to be returned.
+ */
+void *fwnode_connection_find_match(struct fwnode_handle *fwnode,
+ const char *con_id, void *data,
+ devcon_match_fn_t match)
+{
+ void *ret;
+
+ if (!fwnode || !match)
+ return NULL;
+
+ ret = fwnode_graph_devcon_match(fwnode, con_id, data, match);
+ if (ret)
+ return ret;
+
+ return fwnode_devcon_match(fwnode, con_id, data, match);
+}
+EXPORT_SYMBOL_GPL(fwnode_connection_find_match);
+
+/**
* device_connection_find_match - Find physical connection to a device
* @dev: Device with the connection
* @con_id: Identifier for the connection
@@ -83,15 +108,9 @@ void *device_connection_find_match(struct device *dev, const char *con_id,
if (!match)
return NULL;
- if (fwnode) {
- ret = fwnode_graph_devcon_match(fwnode, con_id, data, match);
- if (ret)
- return ret;
-
- ret = fwnode_devcon_match(fwnode, con_id, data, match);
- if (ret)
- return ret;
- }
+ ret = fwnode_connection_find_match(fwnode, con_id, data, match);
+ if (ret)
+ return ret;
mutex_lock(&devcon_lock);
@@ -133,19 +152,13 @@ static struct bus_type *generic_match_buses[] = {
NULL,
};
-static int device_fwnode_match(struct device *dev, const void *fwnode)
-{
- return dev_fwnode(dev) == fwnode;
-}
-
static void *device_connection_fwnode_match(struct device_connection *con)
{
struct bus_type *bus;
struct device *dev;
for (bus = generic_match_buses[0]; bus; bus++) {
- dev = bus_find_device(bus, NULL, (void *)con->fwnode,
- device_fwnode_match);
+ dev = bus_find_device_by_fwnode(bus, con->fwnode);
if (dev && !strncmp(dev_name(dev), con->id, strlen(con->id)))
return dev;
diff --git a/drivers/base/devcoredump.c b/drivers/base/devcoredump.c
index f1a3353f3494..e42d0b514384 100644
--- a/drivers/base/devcoredump.c
+++ b/drivers/base/devcoredump.c
@@ -164,16 +164,7 @@ static struct class devcd_class = {
static ssize_t devcd_readv(char *buffer, loff_t offset, size_t count,
void *data, size_t datalen)
{
- if (offset > datalen)
- return -EINVAL;
-
- if (offset + count > datalen)
- count = datalen - offset;
-
- if (count)
- memcpy(buffer, ((u8 *)data) + offset, count);
-
- return count;
+ return memory_read_from_buffer(buffer, count, &offset, data, datalen);
}
static void devcd_freev(void *data)
@@ -323,7 +314,7 @@ void dev_coredumpm(struct device *dev, struct module *owner,
EXPORT_SYMBOL_GPL(dev_coredumpm);
/**
- * dev_coredumpmsg - create device coredump that uses scatterlist as data
+ * dev_coredumpsg - create device coredump that uses scatterlist as data
* parameter
* @dev: the struct device for the crashed device
* @table: the dump data
diff --git a/drivers/base/devtmpfs.c b/drivers/base/devtmpfs.c
index ba5c80903efe..30d0523014e0 100644
--- a/drivers/base/devtmpfs.c
+++ b/drivers/base/devtmpfs.c
@@ -56,20 +56,32 @@ static int __init mount_param(char *str)
}
__setup("devtmpfs.mount=", mount_param);
-static struct dentry *dev_mount(struct file_system_type *fs_type, int flags,
+static struct vfsmount *mnt;
+
+static struct dentry *public_dev_mount(struct file_system_type *fs_type, int flags,
const char *dev_name, void *data)
{
+ struct super_block *s = mnt->mnt_sb;
+ atomic_inc(&s->s_active);
+ down_write(&s->s_umount);
+ return dget(s->s_root);
+}
+
+static struct file_system_type internal_fs_type = {
+ .name = "devtmpfs",
#ifdef CONFIG_TMPFS
- return mount_single(fs_type, flags, data, shmem_fill_super);
+ .init_fs_context = shmem_init_fs_context,
+ .parameters = &shmem_fs_parameters,
#else
- return mount_single(fs_type, flags, data, ramfs_fill_super);
+ .init_fs_context = ramfs_init_fs_context,
+ .parameters = &ramfs_fs_parameters,
#endif
-}
+ .kill_sb = kill_litter_super,
+};
static struct file_system_type dev_fs_type = {
.name = "devtmpfs",
- .mount = dev_mount,
- .kill_sb = kill_litter_super,
+ .mount = public_dev_mount,
};
#ifdef CONFIG_BLOCK
@@ -378,12 +390,11 @@ static int handle(const char *name, umode_t mode, kuid_t uid, kgid_t gid,
static int devtmpfsd(void *p)
{
- char options[] = "mode=0755";
int *err = p;
*err = ksys_unshare(CLONE_NEWNS);
if (*err)
goto out;
- *err = ksys_mount("devtmpfs", "/", "devtmpfs", MS_SILENT, options);
+ *err = ksys_mount("devtmpfs", "/", "devtmpfs", MS_SILENT, NULL);
if (*err)
goto out;
ksys_chdir("/.."); /* will traverse into overmounted root */
@@ -420,7 +431,16 @@ out:
*/
int __init devtmpfs_init(void)
{
- int err = register_filesystem(&dev_fs_type);
+ char opts[] = "mode=0755";
+ int err;
+
+ mnt = vfs_kern_mount(&internal_fs_type, 0, "devtmpfs", opts);
+ if (IS_ERR(mnt)) {
+ printk(KERN_ERR "devtmpfs: unable to create devtmpfs %ld\n",
+ PTR_ERR(mnt));
+ return PTR_ERR(mnt);
+ }
+ err = register_filesystem(&dev_fs_type);
if (err) {
printk(KERN_ERR "devtmpfs: unable to register devtmpfs "
"type %i\n", err);
diff --git a/drivers/base/memory.c b/drivers/base/memory.c
index 20c39d1bcef8..55907c27075b 100644
--- a/drivers/base/memory.c
+++ b/drivers/base/memory.c
@@ -100,26 +100,9 @@ unsigned long __weak memory_block_size_bytes(void)
}
EXPORT_SYMBOL_GPL(memory_block_size_bytes);
-static unsigned long get_memory_block_size(void)
-{
- unsigned long block_sz;
-
- block_sz = memory_block_size_bytes();
-
- /* Validate blk_sz is a power of 2 and not less than section size */
- if ((block_sz & (block_sz - 1)) || (block_sz < MIN_MEMORY_BLOCK_SIZE)) {
- WARN_ON(1);
- block_sz = MIN_MEMORY_BLOCK_SIZE;
- }
-
- return block_sz;
-}
-
/*
- * use this as the physical section index that this memsection
- * uses.
+ * Show the first physical section index (number) of this memory block.
*/
-
static ssize_t phys_index_show(struct device *dev,
struct device_attribute *attr, char *buf)
{
@@ -131,7 +114,10 @@ static ssize_t phys_index_show(struct device *dev,
}
/*
- * Show whether the section of memory is likely to be hot-removable
+ * Show whether the memory block is likely to be offlineable (or is already
+ * offline). Once offline, the memory block could be removed. The return
+ * value does, however, not indicate that there is a way to remove the
+ * memory block.
*/
static ssize_t removable_show(struct device *dev, struct device_attribute *attr,
char *buf)
@@ -455,12 +441,12 @@ static DEVICE_ATTR_RO(phys_device);
static DEVICE_ATTR_RO(removable);
/*
- * Block size attribute stuff
+ * Show the memory block size (shared by all memory blocks).
*/
static ssize_t block_size_bytes_show(struct device *dev,
struct device_attribute *attr, char *buf)
{
- return sprintf(buf, "%lx\n", get_memory_block_size());
+ return sprintf(buf, "%lx\n", memory_block_size_bytes());
}
static DEVICE_ATTR_RO(block_size_bytes);
@@ -554,6 +540,9 @@ static ssize_t soft_offline_page_store(struct device *dev,
pfn >>= PAGE_SHIFT;
if (!pfn_valid(pfn))
return -ENXIO;
+ /* Only online pages can be soft-offlined (esp., not ZONE_DEVICE). */
+ if (!pfn_to_online_page(pfn))
+ return -EIO;
ret = soft_offline_page(pfn_to_page(pfn), 0);
return ret == 0 ? count : ret;
}
@@ -670,10 +659,10 @@ static int init_memory_block(struct memory_block **memory,
return -ENOMEM;
mem->start_section_nr = block_id * sections_per_block;
- mem->end_section_nr = mem->start_section_nr + sections_per_block - 1;
mem->state = state;
start_pfn = section_nr_to_pfn(mem->start_section_nr);
mem->phys_device = arch_get_memory_phys_device(start_pfn);
+ mem->nid = NUMA_NO_NODE;
ret = register_memory(mem);
@@ -810,19 +799,22 @@ static const struct attribute_group *memory_root_attr_groups[] = {
/*
* Initialize the sysfs support for memory devices...
*/
-int __init memory_dev_init(void)
+void __init memory_dev_init(void)
{
int ret;
int err;
unsigned long block_sz, nr;
+ /* Validate the configured memory block size */
+ block_sz = memory_block_size_bytes();
+ if (!is_power_of_2(block_sz) || block_sz < MIN_MEMORY_BLOCK_SIZE)
+ panic("Memory block size not suitable: 0x%lx\n", block_sz);
+ sections_per_block = block_sz / MIN_MEMORY_BLOCK_SIZE;
+
ret = subsys_system_register(&memory_subsys, memory_root_attr_groups);
if (ret)
goto out;
- block_sz = get_memory_block_size();
- sections_per_block = block_sz / MIN_MEMORY_BLOCK_SIZE;
-
/*
* Create entries for memory sections that were found
* during boot and have been initialized
@@ -838,8 +830,7 @@ int __init memory_dev_init(void)
out:
if (ret)
- printk(KERN_ERR "%s() failed: %d\n", __func__, ret);
- return ret;
+ panic("%s() failed: %d\n", __func__, ret);
}
/**
diff --git a/drivers/base/node.c b/drivers/base/node.c
index 75b7e6f6535b..296546ffed6c 100644
--- a/drivers/base/node.c
+++ b/drivers/base/node.c
@@ -427,6 +427,8 @@ static ssize_t node_read_meminfo(struct device *dev,
"Node %d AnonHugePages: %8lu kB\n"
"Node %d ShmemHugePages: %8lu kB\n"
"Node %d ShmemPmdMapped: %8lu kB\n"
+ "Node %d FileHugePages: %8lu kB\n"
+ "Node %d FilePmdMapped: %8lu kB\n"
#endif
,
nid, K(node_page_state(pgdat, NR_FILE_DIRTY)),
@@ -452,6 +454,10 @@ static ssize_t node_read_meminfo(struct device *dev,
nid, K(node_page_state(pgdat, NR_SHMEM_THPS) *
HPAGE_PMD_NR),
nid, K(node_page_state(pgdat, NR_SHMEM_PMDMAPPED) *
+ HPAGE_PMD_NR),
+ nid, K(node_page_state(pgdat, NR_FILE_THPS) *
+ HPAGE_PMD_NR),
+ nid, K(node_page_state(pgdat, NR_FILE_PMDMAPPED) *
HPAGE_PMD_NR)
#endif
);
@@ -756,15 +762,13 @@ static int __ref get_nid_for_pfn(unsigned long pfn)
static int register_mem_sect_under_node(struct memory_block *mem_blk,
void *arg)
{
+ unsigned long memory_block_pfns = memory_block_size_bytes() / PAGE_SIZE;
+ unsigned long start_pfn = section_nr_to_pfn(mem_blk->start_section_nr);
+ unsigned long end_pfn = start_pfn + memory_block_pfns - 1;
int ret, nid = *(int *)arg;
- unsigned long pfn, sect_start_pfn, sect_end_pfn;
+ unsigned long pfn;
- mem_blk->nid = nid;
-
- sect_start_pfn = section_nr_to_pfn(mem_blk->start_section_nr);
- sect_end_pfn = section_nr_to_pfn(mem_blk->end_section_nr);
- sect_end_pfn += PAGES_PER_SECTION - 1;
- for (pfn = sect_start_pfn; pfn <= sect_end_pfn; pfn++) {
+ for (pfn = start_pfn; pfn <= end_pfn; pfn++) {
int page_nid;
/*
@@ -789,6 +793,13 @@ static int register_mem_sect_under_node(struct memory_block *mem_blk,
if (page_nid != nid)
continue;
}
+
+ /*
+ * If this memory block spans multiple nodes, we only indicate
+ * the last processed node.
+ */
+ mem_blk->nid = nid;
+
ret = sysfs_create_link_nowarn(&node_devices[nid]->dev.kobj,
&mem_blk->dev.kobj,
kobject_name(&mem_blk->dev.kobj));
@@ -804,32 +815,18 @@ static int register_mem_sect_under_node(struct memory_block *mem_blk,
}
/*
- * Unregister memory block device under all nodes that it spans.
- * Has to be called with mem_sysfs_mutex held (due to unlinked_nodes).
+ * Unregister a memory block device under the node it spans. Memory blocks
+ * with multiple nodes cannot be offlined and therefore also never be removed.
*/
void unregister_memory_block_under_nodes(struct memory_block *mem_blk)
{
- unsigned long pfn, sect_start_pfn, sect_end_pfn;
- static nodemask_t unlinked_nodes;
-
- nodes_clear(unlinked_nodes);
- sect_start_pfn = section_nr_to_pfn(mem_blk->start_section_nr);
- sect_end_pfn = section_nr_to_pfn(mem_blk->end_section_nr);
- for (pfn = sect_start_pfn; pfn <= sect_end_pfn; pfn++) {
- int nid;
+ if (mem_blk->nid == NUMA_NO_NODE)
+ return;
- nid = get_nid_for_pfn(pfn);
- if (nid < 0)
- continue;
- if (!node_online(nid))
- continue;
- if (node_test_and_set(nid, unlinked_nodes))
- continue;
- sysfs_remove_link(&node_devices[nid]->dev.kobj,
- kobject_name(&mem_blk->dev.kobj));
- sysfs_remove_link(&mem_blk->dev.kobj,
- kobject_name(&node_devices[nid]->dev.kobj));
- }
+ sysfs_remove_link(&node_devices[mem_blk->nid]->dev.kobj,
+ kobject_name(&mem_blk->dev.kobj));
+ sysfs_remove_link(&mem_blk->dev.kobj,
+ kobject_name(&node_devices[mem_blk->nid]->dev.kobj));
}
int link_mem_sections(int nid, unsigned long start_pfn, unsigned long end_pfn)
diff --git a/drivers/base/platform.c b/drivers/base/platform.c
index ec974ba9c0c4..b230beb6ccb4 100644
--- a/drivers/base/platform.c
+++ b/drivers/base/platform.c
@@ -40,25 +40,6 @@ struct device platform_bus = {
EXPORT_SYMBOL_GPL(platform_bus);
/**
- * arch_setup_pdev_archdata - Allow manipulation of archdata before its used
- * @pdev: platform device
- *
- * This is called before platform_device_add() such that any pdev_archdata may
- * be setup before the platform_notifier is called. So if a user needs to
- * manipulate any relevant information in the pdev_archdata they can do:
- *
- * platform_device_alloc()
- * ... manipulate ...
- * platform_device_add()
- *
- * And if they don't care they can just call platform_device_register() and
- * everything will just work out.
- */
-void __weak arch_setup_pdev_archdata(struct platform_device *pdev)
-{
-}
-
-/**
* platform_get_resource - get a resource for a device
* @dev: platform device
* @type: resource type
@@ -99,12 +80,7 @@ void __iomem *devm_platform_ioremap_resource(struct platform_device *pdev,
EXPORT_SYMBOL_GPL(devm_platform_ioremap_resource);
#endif /* CONFIG_HAS_IOMEM */
-/**
- * platform_get_irq - get an IRQ for a device
- * @dev: platform device
- * @num: IRQ number index
- */
-int platform_get_irq(struct platform_device *dev, unsigned int num)
+static int __platform_get_irq(struct platform_device *dev, unsigned int num)
{
#ifdef CONFIG_SPARC
/* sparc does not have irqs represented as IORESOURCE_IRQ resources */
@@ -168,9 +144,59 @@ int platform_get_irq(struct platform_device *dev, unsigned int num)
return -ENXIO;
#endif
}
+
+/**
+ * platform_get_irq - get an IRQ for a device
+ * @dev: platform device
+ * @num: IRQ number index
+ *
+ * Gets an IRQ for a platform device and prints an error message if finding the
+ * IRQ fails. Device drivers should check the return value for errors so as to
+ * not pass a negative integer value to the request_irq() APIs.
+ *
+ * Example:
+ * int irq = platform_get_irq(pdev, 0);
+ * if (irq < 0)
+ * return irq;
+ *
+ * Return: IRQ number on success, negative error number on failure.
+ */
+int platform_get_irq(struct platform_device *dev, unsigned int num)
+{
+ int ret;
+
+ ret = __platform_get_irq(dev, num);
+ if (ret < 0 && ret != -EPROBE_DEFER)
+ dev_err(&dev->dev, "IRQ index %u not found\n", num);
+
+ return ret;
+}
EXPORT_SYMBOL_GPL(platform_get_irq);
/**
+ * platform_get_irq_optional - get an optional IRQ for a device
+ * @dev: platform device
+ * @num: IRQ number index
+ *
+ * Gets an IRQ for a platform device. Device drivers should check the return
+ * value for errors so as to not pass a negative integer value to the
+ * request_irq() APIs. This is the same as platform_get_irq(), except that it
+ * does not print an error message if an IRQ can not be obtained.
+ *
+ * Example:
+ * int irq = platform_get_irq_optional(pdev, 0);
+ * if (irq < 0)
+ * return irq;
+ *
+ * Return: IRQ number on success, negative error number on failure.
+ */
+int platform_get_irq_optional(struct platform_device *dev, unsigned int num)
+{
+ return __platform_get_irq(dev, num);
+}
+EXPORT_SYMBOL_GPL(platform_get_irq_optional);
+
+/**
* platform_irq_count - Count the number of IRQs a platform device uses
* @dev: platform device
*
@@ -180,7 +206,7 @@ int platform_irq_count(struct platform_device *dev)
{
int ret, nr = 0;
- while ((ret = platform_get_irq(dev, nr)) >= 0)
+ while ((ret = __platform_get_irq(dev, nr)) >= 0)
nr++;
if (ret == -EPROBE_DEFER)
@@ -215,12 +241,8 @@ struct resource *platform_get_resource_byname(struct platform_device *dev,
}
EXPORT_SYMBOL_GPL(platform_get_resource_byname);
-/**
- * platform_get_irq_byname - get an IRQ for a device by name
- * @dev: platform device
- * @name: IRQ name
- */
-int platform_get_irq_byname(struct platform_device *dev, const char *name)
+static int __platform_get_irq_byname(struct platform_device *dev,
+ const char *name)
{
struct resource *r;
@@ -233,11 +255,51 @@ int platform_get_irq_byname(struct platform_device *dev, const char *name)
}
r = platform_get_resource_byname(dev, IORESOURCE_IRQ, name);
- return r ? r->start : -ENXIO;
+ if (r)
+ return r->start;
+
+ return -ENXIO;
+}
+
+/**
+ * platform_get_irq_byname - get an IRQ for a device by name
+ * @dev: platform device
+ * @name: IRQ name
+ *
+ * Get an IRQ like platform_get_irq(), but then by name rather then by index.
+ *
+ * Return: IRQ number on success, negative error number on failure.
+ */
+int platform_get_irq_byname(struct platform_device *dev, const char *name)
+{
+ int ret;
+
+ ret = __platform_get_irq_byname(dev, name);
+ if (ret < 0 && ret != -EPROBE_DEFER)
+ dev_err(&dev->dev, "IRQ %s not found\n", name);
+
+ return ret;
}
EXPORT_SYMBOL_GPL(platform_get_irq_byname);
/**
+ * platform_get_irq_byname_optional - get an optional IRQ for a device by name
+ * @dev: platform device
+ * @name: IRQ name
+ *
+ * Get an optional IRQ by name like platform_get_irq_byname(). Except that it
+ * does not print an error message if an IRQ can not be obtained.
+ *
+ * Return: IRQ number on success, negative error number on failure.
+ */
+int platform_get_irq_byname_optional(struct platform_device *dev,
+ const char *name)
+{
+ return __platform_get_irq_byname(dev, name);
+}
+EXPORT_SYMBOL_GPL(platform_get_irq_byname_optional);
+
+/**
* platform_add_devices - add a numbers of platform devices
* @devs: array of platform devices to add
* @num: number of platform devices in array
@@ -264,6 +326,20 @@ struct platform_object {
char name[];
};
+/*
+ * Set up default DMA mask for platform devices if the they weren't
+ * previously set by the architecture / DT.
+ */
+static void setup_pdev_dma_masks(struct platform_device *pdev)
+{
+ if (!pdev->dev.coherent_dma_mask)
+ pdev->dev.coherent_dma_mask = DMA_BIT_MASK(32);
+ if (!pdev->dma_mask)
+ pdev->dma_mask = DMA_BIT_MASK(32);
+ if (!pdev->dev.dma_mask)
+ pdev->dev.dma_mask = &pdev->dma_mask;
+};
+
/**
* platform_device_put - destroy a platform device
* @pdev: platform device to free
@@ -310,7 +386,7 @@ struct platform_device *platform_device_alloc(const char *name, int id)
pa->pdev.id = id;
device_initialize(&pa->pdev.dev);
pa->pdev.dev.release = platform_device_release;
- arch_setup_pdev_archdata(&pa->pdev);
+ setup_pdev_dma_masks(&pa->pdev);
}
return pa ? &pa->pdev : NULL;
@@ -512,7 +588,7 @@ EXPORT_SYMBOL_GPL(platform_device_del);
int platform_device_register(struct platform_device *pdev)
{
device_initialize(&pdev->dev);
- arch_setup_pdev_archdata(pdev);
+ setup_pdev_dma_masks(pdev);
return platform_device_add(pdev);
}
EXPORT_SYMBOL_GPL(platform_device_register);
@@ -1202,6 +1278,20 @@ struct bus_type platform_bus_type = {
};
EXPORT_SYMBOL_GPL(platform_bus_type);
+/**
+ * platform_find_device_by_driver - Find a platform device with a given
+ * driver.
+ * @start: The device to start the search from.
+ * @drv: The device driver to look for.
+ */
+struct device *platform_find_device_by_driver(struct device *start,
+ const struct device_driver *drv)
+{
+ return bus_find_device(&platform_bus_type, start, drv,
+ (void *)platform_match);
+}
+EXPORT_SYMBOL_GPL(platform_find_device_by_driver);
+
int __init platform_bus_init(void)
{
int error;
diff --git a/drivers/base/power/Makefile b/drivers/base/power/Makefile
index e1bb691cf8f1..ec5bb190b9d0 100644
--- a/drivers/base/power/Makefile
+++ b/drivers/base/power/Makefile
@@ -1,6 +1,6 @@
# SPDX-License-Identifier: GPL-2.0
obj-$(CONFIG_PM) += sysfs.o generic_ops.o common.o qos.o runtime.o wakeirq.o
-obj-$(CONFIG_PM_SLEEP) += main.o wakeup.o
+obj-$(CONFIG_PM_SLEEP) += main.o wakeup.o wakeup_stats.o
obj-$(CONFIG_PM_TRACE_RTC) += trace.o
obj-$(CONFIG_PM_GENERIC_DOMAINS) += domain.o domain_governor.o
obj-$(CONFIG_HAVE_CLK) += clock_ops.o
diff --git a/drivers/base/power/domain.c b/drivers/base/power/domain.c
index b063bc41b0a9..cc85e87eaf05 100644
--- a/drivers/base/power/domain.c
+++ b/drivers/base/power/domain.c
@@ -149,29 +149,24 @@ static inline bool irq_safe_dev_in_no_sleep_domain(struct device *dev,
return ret;
}
+static int genpd_runtime_suspend(struct device *dev);
+
/*
* Get the generic PM domain for a particular struct device.
* This validates the struct device pointer, the PM domain pointer,
* and checks that the PM domain pointer is a real generic PM domain.
* Any failure results in NULL being returned.
*/
-static struct generic_pm_domain *genpd_lookup_dev(struct device *dev)
+static struct generic_pm_domain *dev_to_genpd_safe(struct device *dev)
{
- struct generic_pm_domain *genpd = NULL, *gpd;
-
if (IS_ERR_OR_NULL(dev) || IS_ERR_OR_NULL(dev->pm_domain))
return NULL;
- mutex_lock(&gpd_list_lock);
- list_for_each_entry(gpd, &gpd_list, gpd_list_node) {
- if (&gpd->domain == dev->pm_domain) {
- genpd = gpd;
- break;
- }
- }
- mutex_unlock(&gpd_list_lock);
+ /* A genpd's always have its ->runtime_suspend() callback assigned. */
+ if (dev->pm_domain->ops.runtime_suspend == genpd_runtime_suspend)
+ return pd_to_genpd(dev->pm_domain);
- return genpd;
+ return NULL;
}
/*
@@ -385,8 +380,8 @@ int dev_pm_genpd_set_performance_state(struct device *dev, unsigned int state)
unsigned int prev;
int ret;
- genpd = dev_to_genpd(dev);
- if (IS_ERR(genpd))
+ genpd = dev_to_genpd_safe(dev);
+ if (!genpd)
return -ENODEV;
if (unlikely(!genpd->set_performance_state))
@@ -1610,7 +1605,7 @@ static int genpd_remove_device(struct generic_pm_domain *genpd,
*/
int pm_genpd_remove_device(struct device *dev)
{
- struct generic_pm_domain *genpd = genpd_lookup_dev(dev);
+ struct generic_pm_domain *genpd = dev_to_genpd_safe(dev);
if (!genpd)
return -EINVAL;
diff --git a/drivers/base/power/main.c b/drivers/base/power/main.c
index 7fb2c39bc725..134a8af51511 100644
--- a/drivers/base/power/main.c
+++ b/drivers/base/power/main.c
@@ -716,7 +716,7 @@ static void async_resume_noirq(void *data, async_cookie_t cookie)
put_device(dev);
}
-void dpm_noirq_resume_devices(pm_message_t state)
+static void dpm_noirq_resume_devices(pm_message_t state)
{
struct device *dev;
ktime_t starttime = ktime_get();
@@ -760,13 +760,6 @@ void dpm_noirq_resume_devices(pm_message_t state)
trace_suspend_resume(TPS("dpm_resume_noirq"), state.event, false);
}
-void dpm_noirq_end(void)
-{
- resume_device_irqs();
- device_wakeup_disarm_wake_irqs();
- cpuidle_resume();
-}
-
/**
* dpm_resume_noirq - Execute "noirq resume" callbacks for all devices.
* @state: PM transition of the system being carried out.
@@ -777,7 +770,11 @@ void dpm_noirq_end(void)
void dpm_resume_noirq(pm_message_t state)
{
dpm_noirq_resume_devices(state);
- dpm_noirq_end();
+
+ resume_device_irqs();
+ device_wakeup_disarm_wake_irqs();
+
+ cpuidle_resume();
}
static pm_callback_t dpm_subsys_resume_early_cb(struct device *dev,
@@ -1291,11 +1288,6 @@ static int __device_suspend_noirq(struct device *dev, pm_message_t state, bool a
if (async_error)
goto Complete;
- if (pm_wakeup_pending()) {
- async_error = -EBUSY;
- goto Complete;
- }
-
if (dev->power.syscore || dev->power.direct_complete)
goto Complete;
@@ -1362,14 +1354,7 @@ static int device_suspend_noirq(struct device *dev)
return __device_suspend_noirq(dev, pm_transition, false);
}
-void dpm_noirq_begin(void)
-{
- cpuidle_pause();
- device_wakeup_arm_wake_irqs();
- suspend_device_irqs();
-}
-
-int dpm_noirq_suspend_devices(pm_message_t state)
+static int dpm_noirq_suspend_devices(pm_message_t state)
{
ktime_t starttime = ktime_get();
int error = 0;
@@ -1426,7 +1411,11 @@ int dpm_suspend_noirq(pm_message_t state)
{
int ret;
- dpm_noirq_begin();
+ cpuidle_pause();
+
+ device_wakeup_arm_wake_irqs();
+ suspend_device_irqs();
+
ret = dpm_noirq_suspend_devices(state);
if (ret)
dpm_resume_noirq(resume_event(state));
diff --git a/drivers/base/power/power.h b/drivers/base/power/power.h
index ec33fbdb919b..39a06a0cfdaa 100644
--- a/drivers/base/power/power.h
+++ b/drivers/base/power/power.h
@@ -149,3 +149,21 @@ static inline void device_pm_init(struct device *dev)
device_pm_sleep_init(dev);
pm_runtime_init(dev);
}
+
+#ifdef CONFIG_PM_SLEEP
+
+/* drivers/base/power/wakeup_stats.c */
+extern int wakeup_source_sysfs_add(struct device *parent,
+ struct wakeup_source *ws);
+extern void wakeup_source_sysfs_remove(struct wakeup_source *ws);
+
+extern int pm_wakeup_source_sysfs_add(struct device *parent);
+
+#else /* !CONFIG_PM_SLEEP */
+
+static inline int pm_wakeup_source_sysfs_add(struct device *parent)
+{
+ return 0;
+}
+
+#endif /* CONFIG_PM_SLEEP */
diff --git a/drivers/base/power/qos.c b/drivers/base/power/qos.c
index 6c90fd7e2ff8..350dcafd751f 100644
--- a/drivers/base/power/qos.c
+++ b/drivers/base/power/qos.c
@@ -115,20 +115,10 @@ s32 dev_pm_qos_read_value(struct device *dev, enum dev_pm_qos_req_type type)
spin_lock_irqsave(&dev->power.lock, flags);
- switch (type) {
- case DEV_PM_QOS_RESUME_LATENCY:
+ if (type == DEV_PM_QOS_RESUME_LATENCY) {
ret = IS_ERR_OR_NULL(qos) ? PM_QOS_RESUME_LATENCY_NO_CONSTRAINT
: pm_qos_read_value(&qos->resume_latency);
- break;
- case DEV_PM_QOS_MIN_FREQUENCY:
- ret = IS_ERR_OR_NULL(qos) ? PM_QOS_MIN_FREQUENCY_DEFAULT_VALUE
- : pm_qos_read_value(&qos->min_frequency);
- break;
- case DEV_PM_QOS_MAX_FREQUENCY:
- ret = IS_ERR_OR_NULL(qos) ? PM_QOS_MAX_FREQUENCY_DEFAULT_VALUE
- : pm_qos_read_value(&qos->max_frequency);
- break;
- default:
+ } else {
WARN_ON(1);
ret = 0;
}
@@ -169,14 +159,6 @@ static int apply_constraint(struct dev_pm_qos_request *req,
req->dev->power.set_latency_tolerance(req->dev, value);
}
break;
- case DEV_PM_QOS_MIN_FREQUENCY:
- ret = pm_qos_update_target(&qos->min_frequency,
- &req->data.pnode, action, value);
- break;
- case DEV_PM_QOS_MAX_FREQUENCY:
- ret = pm_qos_update_target(&qos->max_frequency,
- &req->data.pnode, action, value);
- break;
case DEV_PM_QOS_FLAGS:
ret = pm_qos_update_flags(&qos->flags, &req->data.flr,
action, value);
@@ -227,24 +209,6 @@ static int dev_pm_qos_constraints_allocate(struct device *dev)
c->no_constraint_value = PM_QOS_LATENCY_TOLERANCE_NO_CONSTRAINT;
c->type = PM_QOS_MIN;
- c = &qos->min_frequency;
- plist_head_init(&c->list);
- c->target_value = PM_QOS_MIN_FREQUENCY_DEFAULT_VALUE;
- c->default_value = PM_QOS_MIN_FREQUENCY_DEFAULT_VALUE;
- c->no_constraint_value = PM_QOS_MIN_FREQUENCY_DEFAULT_VALUE;
- c->type = PM_QOS_MAX;
- c->notifiers = ++n;
- BLOCKING_INIT_NOTIFIER_HEAD(n);
-
- c = &qos->max_frequency;
- plist_head_init(&c->list);
- c->target_value = PM_QOS_MAX_FREQUENCY_DEFAULT_VALUE;
- c->default_value = PM_QOS_MAX_FREQUENCY_DEFAULT_VALUE;
- c->no_constraint_value = PM_QOS_MAX_FREQUENCY_DEFAULT_VALUE;
- c->type = PM_QOS_MIN;
- c->notifiers = ++n;
- BLOCKING_INIT_NOTIFIER_HEAD(n);
-
INIT_LIST_HEAD(&qos->flags.list);
spin_lock_irq(&dev->power.lock);
@@ -305,18 +269,6 @@ void dev_pm_qos_constraints_destroy(struct device *dev)
memset(req, 0, sizeof(*req));
}
- c = &qos->min_frequency;
- plist_for_each_entry_safe(req, tmp, &c->list, data.pnode) {
- apply_constraint(req, PM_QOS_REMOVE_REQ, PM_QOS_MIN_FREQUENCY_DEFAULT_VALUE);
- memset(req, 0, sizeof(*req));
- }
-
- c = &qos->max_frequency;
- plist_for_each_entry_safe(req, tmp, &c->list, data.pnode) {
- apply_constraint(req, PM_QOS_REMOVE_REQ, PM_QOS_MAX_FREQUENCY_DEFAULT_VALUE);
- memset(req, 0, sizeof(*req));
- }
-
f = &qos->flags;
list_for_each_entry_safe(req, tmp, &f->list, data.flr.node) {
apply_constraint(req, PM_QOS_REMOVE_REQ, PM_QOS_DEFAULT_VALUE);
@@ -428,8 +380,6 @@ static int __dev_pm_qos_update_request(struct dev_pm_qos_request *req,
switch(req->type) {
case DEV_PM_QOS_RESUME_LATENCY:
case DEV_PM_QOS_LATENCY_TOLERANCE:
- case DEV_PM_QOS_MIN_FREQUENCY:
- case DEV_PM_QOS_MAX_FREQUENCY:
curr_value = req->data.pnode.prio;
break;
case DEV_PM_QOS_FLAGS:
@@ -557,14 +507,6 @@ int dev_pm_qos_add_notifier(struct device *dev, struct notifier_block *notifier,
ret = blocking_notifier_chain_register(dev->power.qos->resume_latency.notifiers,
notifier);
break;
- case DEV_PM_QOS_MIN_FREQUENCY:
- ret = blocking_notifier_chain_register(dev->power.qos->min_frequency.notifiers,
- notifier);
- break;
- case DEV_PM_QOS_MAX_FREQUENCY:
- ret = blocking_notifier_chain_register(dev->power.qos->max_frequency.notifiers,
- notifier);
- break;
default:
WARN_ON(1);
ret = -EINVAL;
@@ -604,14 +546,6 @@ int dev_pm_qos_remove_notifier(struct device *dev,
ret = blocking_notifier_chain_unregister(dev->power.qos->resume_latency.notifiers,
notifier);
break;
- case DEV_PM_QOS_MIN_FREQUENCY:
- ret = blocking_notifier_chain_unregister(dev->power.qos->min_frequency.notifiers,
- notifier);
- break;
- case DEV_PM_QOS_MAX_FREQUENCY:
- ret = blocking_notifier_chain_unregister(dev->power.qos->max_frequency.notifiers,
- notifier);
- break;
default:
WARN_ON(1);
ret = -EINVAL;
diff --git a/drivers/base/power/runtime.c b/drivers/base/power/runtime.c
index b75335508d2c..48616f358854 100644
--- a/drivers/base/power/runtime.c
+++ b/drivers/base/power/runtime.c
@@ -287,7 +287,8 @@ static int rpm_get_suppliers(struct device *dev)
{
struct device_link *link;
- list_for_each_entry_rcu(link, &dev->links.suppliers, c_node) {
+ list_for_each_entry_rcu(link, &dev->links.suppliers, c_node,
+ device_links_read_lock_held()) {
int retval;
if (!(link->flags & DL_FLAG_PM_RUNTIME) ||
@@ -309,7 +310,8 @@ static void rpm_put_suppliers(struct device *dev)
{
struct device_link *link;
- list_for_each_entry_rcu(link, &dev->links.suppliers, c_node) {
+ list_for_each_entry_rcu(link, &dev->links.suppliers, c_node,
+ device_links_read_lock_held()) {
if (READ_ONCE(link->status) == DL_STATE_SUPPLIER_UNBIND)
continue;
@@ -1624,7 +1626,7 @@ void pm_runtime_remove(struct device *dev)
* runtime PM references to the device, drop the usage counter of the device
* (as many times as needed).
*
- * Links with the DL_FLAG_STATELESS flag set are ignored.
+ * Links with the DL_FLAG_MANAGED flag unset are ignored.
*
* Since the device is guaranteed to be runtime-active at the point this is
* called, nothing else needs to be done here.
@@ -1640,8 +1642,9 @@ void pm_runtime_clean_up_links(struct device *dev)
idx = device_links_read_lock();
- list_for_each_entry_rcu(link, &dev->links.consumers, s_node) {
- if (link->flags & DL_FLAG_STATELESS)
+ list_for_each_entry_rcu(link, &dev->links.consumers, s_node,
+ device_links_read_lock_held()) {
+ if (!(link->flags & DL_FLAG_MANAGED))
continue;
while (refcount_dec_not_one(&link->rpm_active))
@@ -1662,7 +1665,8 @@ void pm_runtime_get_suppliers(struct device *dev)
idx = device_links_read_lock();
- list_for_each_entry_rcu(link, &dev->links.suppliers, c_node)
+ list_for_each_entry_rcu(link, &dev->links.suppliers, c_node,
+ device_links_read_lock_held())
if (link->flags & DL_FLAG_PM_RUNTIME) {
link->supplier_preactivated = true;
refcount_inc(&link->rpm_active);
@@ -1683,7 +1687,8 @@ void pm_runtime_put_suppliers(struct device *dev)
idx = device_links_read_lock();
- list_for_each_entry_rcu(link, &dev->links.suppliers, c_node)
+ list_for_each_entry_rcu(link, &dev->links.suppliers, c_node,
+ device_links_read_lock_held())
if (link->supplier_preactivated) {
link->supplier_preactivated = false;
if (refcount_dec_not_one(&link->rpm_active))
diff --git a/drivers/base/power/sysfs.c b/drivers/base/power/sysfs.c
index 1b9c281cbe41..d7d82db2e4bc 100644
--- a/drivers/base/power/sysfs.c
+++ b/drivers/base/power/sysfs.c
@@ -5,6 +5,7 @@
#include <linux/export.h>
#include <linux/pm_qos.h>
#include <linux/pm_runtime.h>
+#include <linux/pm_wakeup.h>
#include <linux/atomic.h>
#include <linux/jiffies.h>
#include "power.h"
@@ -667,8 +668,13 @@ int dpm_sysfs_add(struct device *dev)
if (rc)
goto err_wakeup;
}
+ rc = pm_wakeup_source_sysfs_add(dev);
+ if (rc)
+ goto err_latency;
return 0;
+ err_latency:
+ sysfs_unmerge_group(&dev->kobj, &pm_qos_latency_tolerance_attr_group);
err_wakeup:
sysfs_unmerge_group(&dev->kobj, &pm_wakeup_attr_group);
err_runtime:
diff --git a/drivers/base/power/wakeup.c b/drivers/base/power/wakeup.c
index ee31d4f8d856..5817b51d2b15 100644
--- a/drivers/base/power/wakeup.c
+++ b/drivers/base/power/wakeup.c
@@ -72,22 +72,7 @@ static struct wakeup_source deleted_ws = {
.lock = __SPIN_LOCK_UNLOCKED(deleted_ws.lock),
};
-/**
- * wakeup_source_prepare - Prepare a new wakeup source for initialization.
- * @ws: Wakeup source to prepare.
- * @name: Pointer to the name of the new wakeup source.
- *
- * Callers must ensure that the @name string won't be freed when @ws is still in
- * use.
- */
-void wakeup_source_prepare(struct wakeup_source *ws, const char *name)
-{
- if (ws) {
- memset(ws, 0, sizeof(*ws));
- ws->name = name;
- }
-}
-EXPORT_SYMBOL_GPL(wakeup_source_prepare);
+static DEFINE_IDA(wakeup_ida);
/**
* wakeup_source_create - Create a struct wakeup_source object.
@@ -96,13 +81,31 @@ EXPORT_SYMBOL_GPL(wakeup_source_prepare);
struct wakeup_source *wakeup_source_create(const char *name)
{
struct wakeup_source *ws;
+ const char *ws_name;
+ int id;
- ws = kmalloc(sizeof(*ws), GFP_KERNEL);
+ ws = kzalloc(sizeof(*ws), GFP_KERNEL);
if (!ws)
- return NULL;
+ goto err_ws;
+
+ ws_name = kstrdup_const(name, GFP_KERNEL);
+ if (!ws_name)
+ goto err_name;
+ ws->name = ws_name;
+
+ id = ida_alloc(&wakeup_ida, GFP_KERNEL);
+ if (id < 0)
+ goto err_id;
+ ws->id = id;
- wakeup_source_prepare(ws, name ? kstrdup_const(name, GFP_KERNEL) : NULL);
return ws;
+
+err_id:
+ kfree_const(ws->name);
+err_name:
+ kfree(ws);
+err_ws:
+ return NULL;
}
EXPORT_SYMBOL_GPL(wakeup_source_create);
@@ -134,6 +137,13 @@ static void wakeup_source_record(struct wakeup_source *ws)
spin_unlock_irqrestore(&deleted_ws.lock, flags);
}
+static void wakeup_source_free(struct wakeup_source *ws)
+{
+ ida_free(&wakeup_ida, ws->id);
+ kfree_const(ws->name);
+ kfree(ws);
+}
+
/**
* wakeup_source_destroy - Destroy a struct wakeup_source object.
* @ws: Wakeup source to destroy.
@@ -147,8 +157,7 @@ void wakeup_source_destroy(struct wakeup_source *ws)
__pm_relax(ws);
wakeup_source_record(ws);
- kfree_const(ws->name);
- kfree(ws);
+ wakeup_source_free(ws);
}
EXPORT_SYMBOL_GPL(wakeup_source_destroy);
@@ -200,16 +209,26 @@ EXPORT_SYMBOL_GPL(wakeup_source_remove);
/**
* wakeup_source_register - Create wakeup source and add it to the list.
+ * @dev: Device this wakeup source is associated with (or NULL if virtual).
* @name: Name of the wakeup source to register.
*/
-struct wakeup_source *wakeup_source_register(const char *name)
+struct wakeup_source *wakeup_source_register(struct device *dev,
+ const char *name)
{
struct wakeup_source *ws;
+ int ret;
ws = wakeup_source_create(name);
- if (ws)
+ if (ws) {
+ if (!dev || device_is_registered(dev)) {
+ ret = wakeup_source_sysfs_add(dev, ws);
+ if (ret) {
+ wakeup_source_free(ws);
+ return NULL;
+ }
+ }
wakeup_source_add(ws);
-
+ }
return ws;
}
EXPORT_SYMBOL_GPL(wakeup_source_register);
@@ -222,6 +241,7 @@ void wakeup_source_unregister(struct wakeup_source *ws)
{
if (ws) {
wakeup_source_remove(ws);
+ wakeup_source_sysfs_remove(ws);
wakeup_source_destroy(ws);
}
}
@@ -265,7 +285,7 @@ int device_wakeup_enable(struct device *dev)
if (pm_suspend_target_state != PM_SUSPEND_ON)
dev_dbg(dev, "Suspicious %s() during system transition!\n", __func__);
- ws = wakeup_source_register(dev_name(dev));
+ ws = wakeup_source_register(dev, dev_name(dev));
if (!ws)
return -ENOMEM;
@@ -859,7 +879,7 @@ EXPORT_SYMBOL_GPL(pm_system_wakeup);
void pm_system_cancel_wakeup(void)
{
- atomic_dec(&pm_abort_suspend);
+ atomic_dec_if_positive(&pm_abort_suspend);
}
void pm_wakeup_clear(bool reset)
diff --git a/drivers/base/power/wakeup_stats.c b/drivers/base/power/wakeup_stats.c
new file mode 100644
index 000000000000..c7734914d914
--- /dev/null
+++ b/drivers/base/power/wakeup_stats.c
@@ -0,0 +1,214 @@
+// SPDX-License-Identifier: GPL-2.0
+/*
+ * Wakeup statistics in sysfs
+ *
+ * Copyright (c) 2019 Linux Foundation
+ * Copyright (c) 2019 Greg Kroah-Hartman <gregkh@linuxfoundation.org>
+ * Copyright (c) 2019 Google Inc.
+ */
+
+#include <linux/device.h>
+#include <linux/idr.h>
+#include <linux/init.h>
+#include <linux/kdev_t.h>
+#include <linux/kernel.h>
+#include <linux/kobject.h>
+#include <linux/slab.h>
+#include <linux/timekeeping.h>
+
+#include "power.h"
+
+static struct class *wakeup_class;
+
+#define wakeup_attr(_name) \
+static ssize_t _name##_show(struct device *dev, \
+ struct device_attribute *attr, char *buf) \
+{ \
+ struct wakeup_source *ws = dev_get_drvdata(dev); \
+ \
+ return sprintf(buf, "%lu\n", ws->_name); \
+} \
+static DEVICE_ATTR_RO(_name)
+
+wakeup_attr(active_count);
+wakeup_attr(event_count);
+wakeup_attr(wakeup_count);
+wakeup_attr(expire_count);
+
+static ssize_t active_time_ms_show(struct device *dev,
+ struct device_attribute *attr, char *buf)
+{
+ struct wakeup_source *ws = dev_get_drvdata(dev);
+ ktime_t active_time =
+ ws->active ? ktime_sub(ktime_get(), ws->last_time) : 0;
+
+ return sprintf(buf, "%lld\n", ktime_to_ms(active_time));
+}
+static DEVICE_ATTR_RO(active_time_ms);
+
+static ssize_t total_time_ms_show(struct device *dev,
+ struct device_attribute *attr, char *buf)
+{
+ struct wakeup_source *ws = dev_get_drvdata(dev);
+ ktime_t active_time;
+ ktime_t total_time = ws->total_time;
+
+ if (ws->active) {
+ active_time = ktime_sub(ktime_get(), ws->last_time);
+ total_time = ktime_add(total_time, active_time);
+ }
+ return sprintf(buf, "%lld\n", ktime_to_ms(total_time));
+}
+static DEVICE_ATTR_RO(total_time_ms);
+
+static ssize_t max_time_ms_show(struct device *dev,
+ struct device_attribute *attr, char *buf)
+{
+ struct wakeup_source *ws = dev_get_drvdata(dev);
+ ktime_t active_time;
+ ktime_t max_time = ws->max_time;
+
+ if (ws->active) {
+ active_time = ktime_sub(ktime_get(), ws->last_time);
+ if (active_time > max_time)
+ max_time = active_time;
+ }
+ return sprintf(buf, "%lld\n", ktime_to_ms(max_time));
+}
+static DEVICE_ATTR_RO(max_time_ms);
+
+static ssize_t last_change_ms_show(struct device *dev,
+ struct device_attribute *attr, char *buf)
+{
+ struct wakeup_source *ws = dev_get_drvdata(dev);
+
+ return sprintf(buf, "%lld\n", ktime_to_ms(ws->last_time));
+}
+static DEVICE_ATTR_RO(last_change_ms);
+
+static ssize_t name_show(struct device *dev, struct device_attribute *attr,
+ char *buf)
+{
+ struct wakeup_source *ws = dev_get_drvdata(dev);
+
+ return sprintf(buf, "%s\n", ws->name);
+}
+static DEVICE_ATTR_RO(name);
+
+static ssize_t prevent_suspend_time_ms_show(struct device *dev,
+ struct device_attribute *attr,
+ char *buf)
+{
+ struct wakeup_source *ws = dev_get_drvdata(dev);
+ ktime_t prevent_sleep_time = ws->prevent_sleep_time;
+
+ if (ws->active && ws->autosleep_enabled) {
+ prevent_sleep_time = ktime_add(prevent_sleep_time,
+ ktime_sub(ktime_get(), ws->start_prevent_time));
+ }
+ return sprintf(buf, "%lld\n", ktime_to_ms(prevent_sleep_time));
+}
+static DEVICE_ATTR_RO(prevent_suspend_time_ms);
+
+static struct attribute *wakeup_source_attrs[] = {
+ &dev_attr_name.attr,
+ &dev_attr_active_count.attr,
+ &dev_attr_event_count.attr,
+ &dev_attr_wakeup_count.attr,
+ &dev_attr_expire_count.attr,
+ &dev_attr_active_time_ms.attr,
+ &dev_attr_total_time_ms.attr,
+ &dev_attr_max_time_ms.attr,
+ &dev_attr_last_change_ms.attr,
+ &dev_attr_prevent_suspend_time_ms.attr,
+ NULL,
+};
+ATTRIBUTE_GROUPS(wakeup_source);
+
+static void device_create_release(struct device *dev)
+{
+ kfree(dev);
+}
+
+static struct device *wakeup_source_device_create(struct device *parent,
+ struct wakeup_source *ws)
+{
+ struct device *dev = NULL;
+ int retval = -ENODEV;
+
+ dev = kzalloc(sizeof(*dev), GFP_KERNEL);
+ if (!dev) {
+ retval = -ENOMEM;
+ goto error;
+ }
+
+ device_initialize(dev);
+ dev->devt = MKDEV(0, 0);
+ dev->class = wakeup_class;
+ dev->parent = parent;
+ dev->groups = wakeup_source_groups;
+ dev->release = device_create_release;
+ dev_set_drvdata(dev, ws);
+ device_set_pm_not_required(dev);
+
+ retval = kobject_set_name(&dev->kobj, "wakeup%d", ws->id);
+ if (retval)
+ goto error;
+
+ retval = device_add(dev);
+ if (retval)
+ goto error;
+
+ return dev;
+
+error:
+ put_device(dev);
+ return ERR_PTR(retval);
+}
+
+/**
+ * wakeup_source_sysfs_add - Add wakeup_source attributes to sysfs.
+ * @parent: Device given wakeup source is associated with (or NULL if virtual).
+ * @ws: Wakeup source to be added in sysfs.
+ */
+int wakeup_source_sysfs_add(struct device *parent, struct wakeup_source *ws)
+{
+ struct device *dev;
+
+ dev = wakeup_source_device_create(parent, ws);
+ if (IS_ERR(dev))
+ return PTR_ERR(dev);
+ ws->dev = dev;
+
+ return 0;
+}
+
+/**
+ * pm_wakeup_source_sysfs_add - Add wakeup_source attributes to sysfs
+ * for a device if they're missing.
+ * @parent: Device given wakeup source is associated with
+ */
+int pm_wakeup_source_sysfs_add(struct device *parent)
+{
+ if (!parent->power.wakeup || parent->power.wakeup->dev)
+ return 0;
+
+ return wakeup_source_sysfs_add(parent, parent->power.wakeup);
+}
+
+/**
+ * wakeup_source_sysfs_remove - Remove wakeup_source attributes from sysfs.
+ * @ws: Wakeup source to be removed from sysfs.
+ */
+void wakeup_source_sysfs_remove(struct wakeup_source *ws)
+{
+ device_unregister(ws->dev);
+}
+
+static int __init wakeup_sources_sysfs_init(void)
+{
+ wakeup_class = class_create(THIS_MODULE, "wakeup");
+
+ return PTR_ERR_OR_ZERO(wakeup_class);
+}
+postcore_initcall(wakeup_sources_sysfs_init);
diff --git a/drivers/base/regmap/Kconfig b/drivers/base/regmap/Kconfig
index a4984136c19d..0fd6f97ee523 100644
--- a/drivers/base/regmap/Kconfig
+++ b/drivers/base/regmap/Kconfig
@@ -44,7 +44,7 @@ config REGMAP_IRQ
config REGMAP_SOUNDWIRE
tristate
- depends on SOUNDWIRE_BUS
+ depends on SOUNDWIRE
config REGMAP_SCCB
tristate
diff --git a/drivers/base/regmap/regmap-debugfs.c b/drivers/base/regmap/regmap-debugfs.c
index e5e1b3a01b1a..e72843fe41df 100644
--- a/drivers/base/regmap/regmap-debugfs.c
+++ b/drivers/base/regmap/regmap-debugfs.c
@@ -588,14 +588,6 @@ void regmap_debugfs_init(struct regmap *map, const char *name)
}
map->debugfs = debugfs_create_dir(name, regmap_debugfs_root);
- if (!map->debugfs) {
- dev_warn(map->dev,
- "Failed to create %s debugfs directory\n", name);
-
- kfree(map->debugfs_name);
- map->debugfs_name = NULL;
- return;
- }
debugfs_create_file("name", 0400, map->debugfs,
map, &regmap_name_fops);
@@ -672,10 +664,6 @@ void regmap_debugfs_initcall(void)
struct regmap_debugfs_node *node, *tmp;
regmap_debugfs_root = debugfs_create_dir("regmap", NULL);
- if (!regmap_debugfs_root) {
- pr_warn("regmap: Failed to create debugfs root\n");
- return;
- }
mutex_lock(&regmap_debugfs_early_lock);
list_for_each_entry_safe(node, tmp, &regmap_debugfs_early_list, link) {
diff --git a/drivers/base/regmap/regmap-irq.c b/drivers/base/regmap/regmap-irq.c
index c9dc70ceca5f..3d64c9331a82 100644
--- a/drivers/base/regmap/regmap-irq.c
+++ b/drivers/base/regmap/regmap-irq.c
@@ -370,7 +370,6 @@ static irqreturn_t regmap_irq_thread(int irq, void *d)
if (ret < 0) {
dev_err(map->dev, "IRQ thread failed to resume: %d\n",
ret);
- pm_runtime_put(map->dev);
goto exit;
}
}
@@ -425,8 +424,6 @@ static irqreturn_t regmap_irq_thread(int irq, void *d)
dev_err(map->dev,
"Failed to read IRQ status %d\n",
ret);
- if (chip->runtime_pm)
- pm_runtime_put(map->dev);
goto exit;
}
}
@@ -478,8 +475,6 @@ static irqreturn_t regmap_irq_thread(int irq, void *d)
dev_err(map->dev,
"Failed to read IRQ status: %d\n",
ret);
- if (chip->runtime_pm)
- pm_runtime_put(map->dev);
goto exit;
}
}
@@ -513,10 +508,10 @@ static irqreturn_t regmap_irq_thread(int irq, void *d)
}
}
+exit:
if (chip->runtime_pm)
pm_runtime_put(map->dev);
-exit:
if (chip->handle_post_irq)
chip->handle_post_irq(chip->irq_drv_data);
diff --git a/drivers/base/soc.c b/drivers/base/soc.c
index 10b280f30217..7c0c5ca5953d 100644
--- a/drivers/base/soc.c
+++ b/drivers/base/soc.c
@@ -33,6 +33,7 @@ static struct bus_type soc_bus_type = {
static DEVICE_ATTR(machine, S_IRUGO, soc_info_get, NULL);
static DEVICE_ATTR(family, S_IRUGO, soc_info_get, NULL);
+static DEVICE_ATTR(serial_number, S_IRUGO, soc_info_get, NULL);
static DEVICE_ATTR(soc_id, S_IRUGO, soc_info_get, NULL);
static DEVICE_ATTR(revision, S_IRUGO, soc_info_get, NULL);
@@ -57,6 +58,9 @@ static umode_t soc_attribute_mode(struct kobject *kobj,
if ((attr == &dev_attr_revision.attr)
&& (soc_dev->attr->revision != NULL))
return attr->mode;
+ if ((attr == &dev_attr_serial_number.attr)
+ && (soc_dev->attr->serial_number != NULL))
+ return attr->mode;
if ((attr == &dev_attr_soc_id.attr)
&& (soc_dev->attr->soc_id != NULL))
return attr->mode;
@@ -77,6 +81,8 @@ static ssize_t soc_info_get(struct device *dev,
return sprintf(buf, "%s\n", soc_dev->attr->family);
if (attr == &dev_attr_revision)
return sprintf(buf, "%s\n", soc_dev->attr->revision);
+ if (attr == &dev_attr_serial_number)
+ return sprintf(buf, "%s\n", soc_dev->attr->serial_number);
if (attr == &dev_attr_soc_id)
return sprintf(buf, "%s\n", soc_dev->attr->soc_id);
@@ -87,6 +93,7 @@ static ssize_t soc_info_get(struct device *dev,
static struct attribute *soc_attr[] = {
&dev_attr_machine.attr,
&dev_attr_family.attr,
+ &dev_attr_serial_number.attr,
&dev_attr_soc_id.attr,
&dev_attr_revision.attr,
NULL,
@@ -157,6 +164,7 @@ out2:
out1:
return ERR_PTR(ret);
}
+EXPORT_SYMBOL_GPL(soc_device_register);
/* Ensure soc_dev->attr is freed prior to calling soc_device_unregister. */
void soc_device_unregister(struct soc_device *soc_dev)
@@ -166,6 +174,7 @@ void soc_device_unregister(struct soc_device *soc_dev)
device_unregister(&soc_dev->dev);
early_soc_dev_attr = NULL;
}
+EXPORT_SYMBOL_GPL(soc_device_unregister);
static int __init soc_bus_register(void)
{
diff --git a/drivers/base/swnode.c b/drivers/base/swnode.c
index e7b3aa3bd55a..a1f3f0994f9f 100644
--- a/drivers/base/swnode.c
+++ b/drivers/base/swnode.c
@@ -51,7 +51,7 @@ EXPORT_SYMBOL_GPL(is_software_node);
static struct swnode *
software_node_to_swnode(const struct software_node *node)
{
- struct swnode *swnode;
+ struct swnode *swnode = NULL;
struct kobject *k;
if (!node)
@@ -620,6 +620,43 @@ static const struct fwnode_operations software_node_ops = {
/* -------------------------------------------------------------------------- */
+/**
+ * software_node_find_by_name - Find software node by name
+ * @parent: Parent of the software node
+ * @name: Name of the software node
+ *
+ * The function will find a node that is child of @parent and that is named
+ * @name. If no node is found, the function returns NULL.
+ *
+ * NOTE: you will need to drop the reference with fwnode_handle_put() after use.
+ */
+const struct software_node *
+software_node_find_by_name(const struct software_node *parent, const char *name)
+{
+ struct swnode *swnode = NULL;
+ struct kobject *k;
+
+ if (!name)
+ return NULL;
+
+ spin_lock(&swnode_kset->list_lock);
+
+ list_for_each_entry(k, &swnode_kset->list, entry) {
+ swnode = kobj_to_swnode(k);
+ if (parent == swnode->node->parent && swnode->node->name &&
+ !strcmp(name, swnode->node->name)) {
+ kobject_get(&swnode->kobj);
+ break;
+ }
+ swnode = NULL;
+ }
+
+ spin_unlock(&swnode_kset->list_lock);
+
+ return swnode ? swnode->node : NULL;
+}
+EXPORT_SYMBOL_GPL(software_node_find_by_name);
+
static int
software_node_register_properties(struct software_node *node,
const struct property_entry *properties)
Copyright © 1996 – 2023 Jason A. Donenfeld. All Rights Reverse Engineered.