* that generate uevents to add the environment variables.
* @probe: Called when a new device or driver add to this bus, and callback
* the specific driver's probe to initial the matched device.
+ * @sync_state: Called to sync device state to software state after all the
+ * state tracking consumers linked to this device (present at
+ * the time of late_initcall) have successfully bound to a
+ * driver. If the device has no consumers, this function will
+ * be called at late_initcall_sync level. If the device has
+ * consumers that are never bound to a driver, this function
+ * will never get called until they do.
* @remove: Called when a device removed from this bus.
* @shutdown: Called at shut-down time to quiesce the device.
*
int (*match)(struct device *dev, struct device_driver *drv);
int (*uevent)(struct device *dev, struct kobj_uevent_env *env);
int (*probe)(struct device *dev);
+ void (*sync_state)(struct device *dev);
int (*remove)(struct device *dev);
void (*shutdown)(struct device *dev);
* @probe: Called to query the existence of a specific device,
* whether this driver can work with it, and bind the driver
* to a specific device.
+ * @sync_state: Called to sync device state to software state after all the
+ * state tracking consumers linked to this device (present at
+ * the time of late_initcall) have successfully bound to a
+ * driver. If the device has no consumers, this function will
+ * be called at late_initcall_sync level. If the device has
+ * consumers that are never bound to a driver, this function
+ * will never get called until they do.
* @remove: Called when the device is removed from the system to
* unbind a device from this driver.
* @shutdown: Called at shut-down time to quiesce the device.
const struct acpi_device_id *acpi_match_table;
int (*probe) (struct device *dev);
+ void (*sync_state)(struct device *dev);
int (*remove) (struct device *dev);
void (*shutdown) (struct device *dev);
int (*suspend) (struct device *dev, pm_message_t state);
void __iomem *devm_ioremap_resource(struct device *dev,
const struct resource *res);
+void __iomem *devm_ioremap_resource_wc(struct device *dev,
+ const struct resource *res);
void __iomem *devm_of_iomap(struct device *dev,
struct device_node *node, int index,
* AUTOREMOVE_SUPPLIER: Remove the link automatically on supplier driver unbind.
* AUTOPROBE_CONSUMER: Probe consumer driver automatically after supplier binds.
* MANAGED: The core tracks presence of supplier/consumer drivers (internal).
+ * SYNC_STATE_ONLY: Link only affects sync_state() behavior.
*/
#define DL_FLAG_STATELESS BIT(0)
#define DL_FLAG_AUTOREMOVE_CONSUMER BIT(1)
#define DL_FLAG_AUTOREMOVE_SUPPLIER BIT(4)
#define DL_FLAG_AUTOPROBE_CONSUMER BIT(5)
#define DL_FLAG_MANAGED BIT(6)
+#define DL_FLAG_SYNC_STATE_ONLY BIT(7)
/**
* struct device_link - Device link representation.
* struct dev_links_info - Device data related to device links.
* @suppliers: List of links to supplier devices.
* @consumers: List of links to consumer devices.
+ * @needs_suppliers: Hook to global list of devices waiting for suppliers.
+ * @defer_sync: Hook to global list of devices that have deferred sync_state.
+ * @need_for_probe: If needs_suppliers is on a list, this indicates if the
+ * suppliers are needed for probe or not.
* @status: Driver status information.
*/
struct dev_links_info {
struct list_head suppliers;
struct list_head consumers;
+ struct list_head needs_suppliers;
+ struct list_head defer_sync;
+ bool need_for_probe;
enum dl_dev_state status;
};
* @coherent_dma_mask: Like dma_mask, but for alloc_coherent mapping as not all
* hardware supports 64-bit addresses for consistent allocations
* such descriptors.
- * @bus_dma_mask: Mask of an upstream bridge or bus which imposes a smaller DMA
- * limit than the device itself supports.
+ * @bus_dma_limit: Limit of an upstream bridge or bus which imposes a smaller
+ * DMA limit than the device itself supports.
* @dma_pfn_offset: offset of DMA memory range relatively of RAM
* @dma_parms: A low level driver may set these to teach IOMMU code about
* segment limitations.
* @offline: Set after successful invocation of bus type's .offline().
* @of_node_reused: Set if the device-tree node is shared with an ancestor
* device.
+ * @state_synced: The hardware state of this device has been synced to match
+ * the software state of this device by calling the driver/bus
+ * sync_state() callback.
* @dma_coherent: this particular device is dma coherent, even if the
* architecture supports non-coherent devices.
*
not all hardware supports
64 bit addresses for consistent
allocations such descriptors. */
- u64 bus_dma_mask; /* upstream dma_mask constraint */
+ u64 bus_dma_limit; /* upstream dma constraint */
unsigned long dma_pfn_offset;
struct device_dma_parameters *dma_parms;
bool offline_disabled:1;
bool offline:1;
bool of_node_reused:1;
+ bool state_synced:1;
#if defined(CONFIG_ARCH_HAS_SYNC_DMA_FOR_DEVICE) || \
defined(CONFIG_ARCH_HAS_SYNC_DMA_FOR_CPU) || \
defined(CONFIG_ARCH_HAS_SYNC_DMA_FOR_CPU_ALL)
struct device *supplier, u32 flags);
void device_link_del(struct device_link *link);
void device_link_remove(void *consumer, struct device *supplier);
+void device_links_supplier_sync_state_pause(void);
+void device_links_supplier_sync_state_resume(void);
#ifndef dev_fmt
#define dev_fmt(fmt) fmt
git.samba.org / sfrench / cifs-2.6.git / blobdiff