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authorLinus Torvalds <torvalds@linux-foundation.org>2016-12-13 11:42:18 -0800
committerLinus Torvalds <torvalds@linux-foundation.org>2016-12-13 11:42:18 -0800
commit098c30557a9a19827240aaadc137e4668157dc6b (patch)
tree793d589e27197e754fb38c5ae08b763d6e5d0334 /include
parent72cca7baf4fba777b8ab770b902cf2e08941773f (diff)
parent5d47ec02c37ea632398cb251c884e3a488dff794 (diff)
downloadlinux-098c30557a9a19827240aaadc137e4668157dc6b.tar.bz2
Merge tag 'driver-core-4.10-rc1' of git://git.kernel.org/pub/scm/linux/kernel/git/gregkh/driver-core
Pull driver core updates from Greg KH: "Here's the new driver core patches for 4.10-rc1. Big thing here is the nice addition of "functional dependencies" to the driver core. The idea has been talked about for a very long time, great job to Rafael for stepping up and implementing it. It's been tested for longer than the 4.9-rc1 date, we held off on merging it earlier in order to feel more comfortable about it. Other than that, it's just a handful of small other patches, some good cleanups to the mess that is the firmware class code, and we have a test driver for the deferred probe logic. All of these have been in linux-next for a while with no reported issues" * tag 'driver-core-4.10-rc1' of git://git.kernel.org/pub/scm/linux/kernel/git/gregkh/driver-core: (30 commits) firmware: Correct handling of fw_state_wait() return value driver core: Silence device links sphinx warning firmware: remove warning at documentation generation time drivers: base: dma-mapping: Fix typo in dmam_alloc_non_coherent comments driver core: test_async: fix up typo found by 0-day firmware: move fw_state_is_done() into UHM section firmware: do not use fw_lock for fw_state protection firmware: drop bit ops in favor of simple state machine firmware: refactor loading status firmware: fix usermode helper fallback loading driver core: firmware_class: convert to use class_groups driver core: devcoredump: convert to use class_groups driver core: class: add class_groups support kernfs: Declare two local data structures static driver-core: fix platform_no_drv_owner.cocci warnings drivers/base/memory.c: Remove unused 'first_page' variable driver core: add CLASS_ATTR_WO() drivers: base: cacheinfo: support DT overrides for cache properties drivers: base: cacheinfo: add pr_fmt logging drivers: base: cacheinfo: fix boot error message when acpi is enabled ...
Diffstat (limited to 'include')
-rw-r--r--include/linux/cacheinfo.h1
-rw-r--r--include/linux/debugfs.h44
-rw-r--r--include/linux/device.h91
-rw-r--r--include/linux/pm.h2
-rw-r--r--include/linux/pm_runtime.h10
5 files changed, 131 insertions, 17 deletions
diff --git a/include/linux/cacheinfo.h b/include/linux/cacheinfo.h
index 2189935075b4..a951fd10aaaa 100644
--- a/include/linux/cacheinfo.h
+++ b/include/linux/cacheinfo.h
@@ -71,6 +71,7 @@ struct cpu_cacheinfo {
struct cacheinfo *info_list;
unsigned int num_levels;
unsigned int num_leaves;
+ bool cpu_map_populated;
};
/*
diff --git a/include/linux/debugfs.h b/include/linux/debugfs.h
index bf1907d96097..014cc564d1c4 100644
--- a/include/linux/debugfs.h
+++ b/include/linux/debugfs.h
@@ -63,6 +63,21 @@ debugfs_real_fops(const struct file *filp)
return filp->f_path.dentry->d_fsdata;
}
+#define DEFINE_DEBUGFS_ATTRIBUTE(__fops, __get, __set, __fmt) \
+static int __fops ## _open(struct inode *inode, struct file *file) \
+{ \
+ __simple_attr_check_format(__fmt, 0ull); \
+ return simple_attr_open(inode, file, __get, __set, __fmt); \
+} \
+static const struct file_operations __fops = { \
+ .owner = THIS_MODULE, \
+ .open = __fops ## _open, \
+ .release = simple_attr_release, \
+ .read = debugfs_attr_read, \
+ .write = debugfs_attr_write, \
+ .llseek = generic_file_llseek, \
+}
+
#if defined(CONFIG_DEBUG_FS)
struct dentry *debugfs_create_file(const char *name, umode_t mode,
@@ -100,21 +115,6 @@ ssize_t debugfs_attr_read(struct file *file, char __user *buf,
ssize_t debugfs_attr_write(struct file *file, const char __user *buf,
size_t len, loff_t *ppos);
-#define DEFINE_DEBUGFS_ATTRIBUTE(__fops, __get, __set, __fmt) \
-static int __fops ## _open(struct inode *inode, struct file *file) \
-{ \
- __simple_attr_check_format(__fmt, 0ull); \
- return simple_attr_open(inode, file, __get, __set, __fmt); \
-} \
-static const struct file_operations __fops = { \
- .owner = THIS_MODULE, \
- .open = __fops ## _open, \
- .release = simple_attr_release, \
- .read = debugfs_attr_read, \
- .write = debugfs_attr_write, \
- .llseek = generic_file_llseek, \
-}
-
struct dentry *debugfs_rename(struct dentry *old_dir, struct dentry *old_dentry,
struct dentry *new_dir, const char *new_name);
@@ -234,8 +234,18 @@ static inline void debugfs_use_file_finish(int srcu_idx)
__releases(&debugfs_srcu)
{ }
-#define DEFINE_DEBUGFS_ATTRIBUTE(__fops, __get, __set, __fmt) \
- static const struct file_operations __fops = { 0 }
+static inline ssize_t debugfs_attr_read(struct file *file, char __user *buf,
+ size_t len, loff_t *ppos)
+{
+ return -ENODEV;
+}
+
+static inline ssize_t debugfs_attr_write(struct file *file,
+ const char __user *buf,
+ size_t len, loff_t *ppos)
+{
+ return -ENODEV;
+}
static inline struct dentry *debugfs_rename(struct dentry *old_dir, struct dentry *old_dentry,
struct dentry *new_dir, char *new_name)
diff --git a/include/linux/device.h b/include/linux/device.h
index 94926d3ad6c6..491b4c0ca633 100644
--- a/include/linux/device.h
+++ b/include/linux/device.h
@@ -362,6 +362,7 @@ int subsys_virtual_register(struct bus_type *subsys,
* @name: Name of the class.
* @owner: The module owner.
* @class_attrs: Default attributes of this class.
+ * @class_groups: Default attributes of this class.
* @dev_groups: Default attributes of the devices that belong to the class.
* @dev_kobj: The kobject that represents this class and links it into the hierarchy.
* @dev_uevent: Called when a device is added, removed from this class, or a
@@ -390,6 +391,7 @@ struct class {
struct module *owner;
struct class_attribute *class_attrs;
+ const struct attribute_group **class_groups;
const struct attribute_group **dev_groups;
struct kobject *dev_kobj;
@@ -465,6 +467,8 @@ struct class_attribute {
struct class_attribute class_attr_##_name = __ATTR_RW(_name)
#define CLASS_ATTR_RO(_name) \
struct class_attribute class_attr_##_name = __ATTR_RO(_name)
+#define CLASS_ATTR_WO(_name) \
+ struct class_attribute class_attr_##_name = __ATTR_WO(_name)
extern int __must_check class_create_file_ns(struct class *class,
const struct class_attribute *attr,
@@ -727,6 +731,87 @@ struct device_dma_parameters {
};
/**
+ * enum device_link_state - Device link states.
+ * @DL_STATE_NONE: The presence of the drivers is not being tracked.
+ * @DL_STATE_DORMANT: None of the supplier/consumer drivers is present.
+ * @DL_STATE_AVAILABLE: The supplier driver is present, but the consumer is not.
+ * @DL_STATE_CONSUMER_PROBE: The consumer is probing (supplier driver present).
+ * @DL_STATE_ACTIVE: Both the supplier and consumer drivers are present.
+ * @DL_STATE_SUPPLIER_UNBIND: The supplier driver is unbinding.
+ */
+enum device_link_state {
+ DL_STATE_NONE = -1,
+ DL_STATE_DORMANT = 0,
+ DL_STATE_AVAILABLE,
+ DL_STATE_CONSUMER_PROBE,
+ DL_STATE_ACTIVE,
+ DL_STATE_SUPPLIER_UNBIND,
+};
+
+/*
+ * Device link flags.
+ *
+ * STATELESS: The core won't track the presence of supplier/consumer drivers.
+ * AUTOREMOVE: Remove this link automatically on consumer driver unbind.
+ * PM_RUNTIME: If set, the runtime PM framework will use this link.
+ * RPM_ACTIVE: Run pm_runtime_get_sync() on the supplier during link creation.
+ */
+#define DL_FLAG_STATELESS BIT(0)
+#define DL_FLAG_AUTOREMOVE BIT(1)
+#define DL_FLAG_PM_RUNTIME BIT(2)
+#define DL_FLAG_RPM_ACTIVE BIT(3)
+
+/**
+ * struct device_link - Device link representation.
+ * @supplier: The device on the supplier end of the link.
+ * @s_node: Hook to the supplier device's list of links to consumers.
+ * @consumer: The device on the consumer end of the link.
+ * @c_node: Hook to the consumer device's list of links to suppliers.
+ * @status: The state of the link (with respect to the presence of drivers).
+ * @flags: Link flags.
+ * @rpm_active: Whether or not the consumer device is runtime-PM-active.
+ * @rcu_head: An RCU head to use for deferred execution of SRCU callbacks.
+ */
+struct device_link {
+ struct device *supplier;
+ struct list_head s_node;
+ struct device *consumer;
+ struct list_head c_node;
+ enum device_link_state status;
+ u32 flags;
+ bool rpm_active;
+#ifdef CONFIG_SRCU
+ struct rcu_head rcu_head;
+#endif
+};
+
+/**
+ * enum dl_dev_state - Device driver presence tracking information.
+ * @DL_DEV_NO_DRIVER: There is no driver attached to the device.
+ * @DL_DEV_PROBING: A driver is probing.
+ * @DL_DEV_DRIVER_BOUND: The driver has been bound to the device.
+ * @DL_DEV_UNBINDING: The driver is unbinding from the device.
+ */
+enum dl_dev_state {
+ DL_DEV_NO_DRIVER = 0,
+ DL_DEV_PROBING,
+ DL_DEV_DRIVER_BOUND,
+ DL_DEV_UNBINDING,
+};
+
+/**
+ * struct dev_links_info - Device data related to device links.
+ * @suppliers: List of links to supplier devices.
+ * @consumers: List of links to consumer devices.
+ * @status: Driver status information.
+ */
+struct dev_links_info {
+ struct list_head suppliers;
+ struct list_head consumers;
+ enum dl_dev_state status;
+};
+
+/**
* struct device - The basic device structure
* @parent: The device's "parent" device, the device to which it is attached.
* In most cases, a parent device is some sort of bus or host
@@ -751,6 +836,7 @@ struct device_dma_parameters {
* on. This shrinks the "Board Support Packages" (BSPs) and
* minimizes board-specific #ifdefs in drivers.
* @driver_data: Private pointer for driver specific info.
+ * @links: Links to suppliers and consumers of this device.
* @power: For device power management.
* See Documentation/power/admin-guide/devices.rst for details.
* @pm_domain: Provide callbacks that are executed during system suspend,
@@ -818,6 +904,7 @@ struct device {
core doesn't touch it */
void *driver_data; /* Driver data, set and get with
dev_set/get_drvdata */
+ struct dev_links_info links;
struct dev_pm_info power;
struct dev_pm_domain *pm_domain;
@@ -1135,6 +1222,10 @@ extern void device_shutdown(void);
/* debugging and troubleshooting/diagnostic helpers. */
extern const char *dev_driver_string(const struct device *dev);
+/* Device links interface. */
+struct device_link *device_link_add(struct device *consumer,
+ struct device *supplier, u32 flags);
+void device_link_del(struct device_link *link);
#ifdef CONFIG_PRINTK
diff --git a/include/linux/pm.h b/include/linux/pm.h
index efa67b2dfee9..f926af41e122 100644
--- a/include/linux/pm.h
+++ b/include/linux/pm.h
@@ -559,6 +559,7 @@ struct dev_pm_info {
pm_message_t power_state;
unsigned int can_wakeup:1;
unsigned int async_suspend:1;
+ bool in_dpm_list:1; /* Owned by the PM core */
bool is_prepared:1; /* Owned by the PM core */
bool is_suspended:1; /* Ditto */
bool is_noirq_suspended:1;
@@ -596,6 +597,7 @@ struct dev_pm_info {
unsigned int use_autosuspend:1;
unsigned int timer_autosuspends:1;
unsigned int memalloc_noio:1;
+ unsigned int links_count;
enum rpm_request request;
enum rpm_status runtime_status;
int runtime_error;
diff --git a/include/linux/pm_runtime.h b/include/linux/pm_runtime.h
index 4957fc185ea9..ca4823e675e2 100644
--- a/include/linux/pm_runtime.h
+++ b/include/linux/pm_runtime.h
@@ -55,6 +55,11 @@ extern unsigned long pm_runtime_autosuspend_expiration(struct device *dev);
extern void pm_runtime_update_max_time_suspended(struct device *dev,
s64 delta_ns);
extern void pm_runtime_set_memalloc_noio(struct device *dev, bool enable);
+extern void pm_runtime_clean_up_links(struct device *dev);
+extern void pm_runtime_get_suppliers(struct device *dev);
+extern void pm_runtime_put_suppliers(struct device *dev);
+extern void pm_runtime_new_link(struct device *dev);
+extern void pm_runtime_drop_link(struct device *dev);
static inline void pm_suspend_ignore_children(struct device *dev, bool enable)
{
@@ -179,6 +184,11 @@ static inline unsigned long pm_runtime_autosuspend_expiration(
struct device *dev) { return 0; }
static inline void pm_runtime_set_memalloc_noio(struct device *dev,
bool enable){}
+static inline void pm_runtime_clean_up_links(struct device *dev) {}
+static inline void pm_runtime_get_suppliers(struct device *dev) {}
+static inline void pm_runtime_put_suppliers(struct device *dev) {}
+static inline void pm_runtime_new_link(struct device *dev) {}
+static inline void pm_runtime_drop_link(struct device *dev) {}
#endif /* !CONFIG_PM */