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*参照元 [#x6aca22d] #backlinks *説明 [#b979a5ab] -パス: [[linux-4.4.1/include/linux/device.h]] -FIXME: これは何？ --説明 **参考 [#m9412538] *実装 [#e4b6e493] /** * 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 * controller. If parent is NULL, the device, is a top-level device, * which is not usually what you want. * @p: Holds the private data of the driver core portions of the device. * See the comment of the struct device_private for detail. * @kobj: A top-level, abstract class from which other classes are derived. * @init_name: Initial name of the device. * @type: The type of device. * This identifies the device type and carries type-specific * information. * @mutex: Mutex to synchronize calls to its driver. * @bus: Type of bus device is on. * @driver: Which driver has allocated this * @platform_data: Platform data specific to the device. * Example: For devices on custom boards, as typical of embedded * and SOC based hardware, Linux often uses platform_data to point * to board-specific structures describing devices and how they * are wired. That can include what ports are available, chip * variants, which GPIO pins act in what additional roles, and so * on. This shrinks the "Board Support Packages" (BSPs) and * minimizes board-specific #ifdefs in drivers. * @driver_data: Private pointer for driver specific info. * @power: For device power management. * See Documentation/power/devices.txt for details. * @pm_domain: Provide callbacks that are executed during system suspend, * hibernation, system resume and during runtime PM transitions * along with subsystem-level and driver-level callbacks. * @pins: For device pin management. * See Documentation/pinctrl.txt for details. * @msi_list: Hosts MSI descriptors * @msi_domain: The generic MSI domain this device is using. * @numa_node: NUMA node this device is close to. * @dma_mask: Dma mask (if dma'ble device). * @coherent_dma_mask: Like dma_mask, but for alloc_coherent mapping as not all * hardware supports 64-bit addresses for consistent allocations * such descriptors. * @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. * @dma_pools: Dma pools (if dma'ble device). * @dma_mem: Internal for coherent mem override. * @cma_area: Contiguous memory area for dma allocations * @archdata: For arch-specific additions. * @of_node: Associated device tree node. * @fwnode: Associated device node supplied by platform firmware. * @devt: For creating the sysfs "dev". * @id: device instance * @devres_lock: Spinlock to protect the resource of the device. * @devres_head: The resources list of the device. * @knode_class: The node used to add the device to the class list. * @class: The class of the device. * @groups: Optional attribute groups. * @release: Callback to free the device after all references have * gone away. This should be set by the allocator of the * device (i.e. the bus driver that discovered the device). * @iommu_group: IOMMU group the device belongs to. * * @offline_disabled: If set, the device is permanently online. * @offline: Set after successful invocation of bus type's .offline(). * * At the lowest level, every device in a Linux system is represented by an * instance of struct device. The device structure contains the information * that the device model core needs to model the system. Most subsystems, * however, track additional information about the devices they host. As a * result, it is rare for devices to be represented by bare device structures; * instead, that structure, like kobject structures, is usually embedded within * a higher-level representation of the device. */ struct device { struct device *parent; - --[[linux-4.4.1/parent]] struct device_private *p; - --[[linux-4.4.1/device_private]] struct kobject kobj; - --[[linux-4.4.1/kobj]] const char *init_name; /* initial name of the device */ const struct device_type *type; - --[[linux-4.4.1/device_type]] struct mutex mutex; /* mutex to synchronize calls to * its driver. */ - --[[linux-4.4.1/mutex]] struct bus_type *bus; /* type of bus device is on */ - --[[linux-4.4.1/bus_type]] struct device_driver *driver; /* which driver has allocated this device */ - --[[linux-4.4.1/device_driver]] void *platform_data; /* Platform specific data, device core doesn't touch it */ void *driver_data; /* Driver data, set and get with dev_set/get_drvdata */ struct dev_pm_info power; struct dev_pm_domain *pm_domain; - --[[linux-4.4.1/dev_pm_info]] --[[linux-4.4.1/dev_pm_domain]] #ifdef CONFIG_GENERIC_MSI_IRQ_DOMAIN - --[[linux-4.4.1/CONFIG_GENERIC_MSI_IRQ_DOMAIN]] struct irq_domain *msi_domain; - --[[linux-4.4.1/irq_domain]] #endif #ifdef CONFIG_PINCTRL - --[[linux-4.4.1/CONFIG_PINCTRL]] struct dev_pin_info *pins; - --[[linux-4.4.1/dev_pin_info]] #endif #ifdef CONFIG_GENERIC_MSI_IRQ - --[[linux-4.4.1/CONFIG_GENERIC_MSI_IRQ]] struct list_head msi_list; - --[[linux-4.4.1/list_head]] #endif #ifdef CONFIG_NUMA - --[[linux-4.4.1/CONFIG_NUMA]] int numa_node; /* NUMA node this device is close to */ #endif u64 *dma_mask; /* dma mask (if dma'able device) */ u64 coherent_dma_mask;/* Like dma_mask, but for alloc_coherent mappings as not all hardware supports 64 bit addresses for consistent allocations such descriptors. */ unsigned long dma_pfn_offset; struct device_dma_parameters *dma_parms; - --[[linux-4.4.1/device_dma_parameters]] struct list_head dma_pools; /* dma pools (if dma'ble) */ struct dma_coherent_mem *dma_mem; /* internal for coherent mem override */ - --[[linux-4.4.1/dma_coherent_mem]] #ifdef CONFIG_DMA_CMA - --[[linux-4.4.1/CONFIG_DMA_CMA]] struct cma *cma_area; /* contiguous memory area for dma allocations */ - --[[linux-4.4.1/cma]] #endif /* arch specific additions */ struct dev_archdata archdata; - --[[linux-4.4.1/dev_archdata]] struct device_node *of_node; /* associated device tree node */ - --[[linux-4.4.1/device_node]] struct fwnode_handle *fwnode; /* firmware device node */ - --[[linux-4.4.1/fwnode_handle]] dev_t devt; /* dev_t, creates the sysfs "dev" */ u32 id; /* device instance */ - --[[linux-4.4.1/dev_t]] spinlock_t devres_lock; struct list_head devres_head; - --[[linux-4.4.1/spinlock_t]] struct klist_node knode_class; struct class *class; const struct attribute_group **groups; /* optional groups */ - --[[linux-4.4.1/klist_node]] --[[linux-4.4.1/class]] --[[linux-4.4.1/attribute_group]] void (*release)(struct device *dev); struct iommu_group *iommu_group; - --[[linux-4.4.1/iommu_group]] bool offline_disabled:1; bool offline:1; }; *コメント [#yc4c94c3]
