include/linux/uacce.h

Source file repositories/reference/linux-study-clean/include/linux/uacce.h

File Facts

System
Linux kernel
Corpus path
include/linux/uacce.h
Extension
.h
Size
4470 bytes
Lines
162
Domain
Core OS
Bucket
Core Kernel Interface
Inferred role
Core OS: implementation source
Status
source implementation candidate

Why This File Exists

Core operating-system implementation surface: boot, tasks, memory, VFS, syscall-facing interfaces, synchronization, credentials, and isolation.

Dependency Surface

Detected Declarations

Annotated Snippet

struct uacce_qfile_region {
	enum uacce_qfrt type;
};

/**
 * struct uacce_ops - uacce device operations
 * @get_available_instances:  get available instances left of the device
 * @get_queue: get a queue from the device
 * @put_queue: free a queue to the device
 * @start_queue: make the queue start work after get_queue
 * @stop_queue: make the queue stop work before put_queue
 * @is_q_updated: check whether the task is finished
 * @mmap: mmap addresses of queue to user space
 * @ioctl: ioctl for user space users of the queue
 * @get_isolate_state: get the device state after set the isolate strategy
 * @isolate_err_threshold_write: stored the isolate error threshold to the device
 * @isolate_err_threshold_read: read the isolate error threshold value from the device
 */
struct uacce_ops {
	int (*get_available_instances)(struct uacce_device *uacce);
	int (*get_queue)(struct uacce_device *uacce, unsigned long arg,
			 struct uacce_queue *q);
	void (*put_queue)(struct uacce_queue *q);
	int (*start_queue)(struct uacce_queue *q);
	void (*stop_queue)(struct uacce_queue *q);
	int (*is_q_updated)(struct uacce_queue *q);
	int (*mmap)(struct uacce_queue *q, struct vm_area_struct *vma,
		    struct uacce_qfile_region *qfr);
	long (*ioctl)(struct uacce_queue *q, unsigned int cmd,
		      unsigned long arg);
	enum uacce_dev_state (*get_isolate_state)(struct uacce_device *uacce);
	int (*isolate_err_threshold_write)(struct uacce_device *uacce, u32 num);
	u32 (*isolate_err_threshold_read)(struct uacce_device *uacce);
};

/**
 * struct uacce_interface - interface required for uacce_register()
 * @name: the uacce device name.  Will show up in sysfs
 * @flags: uacce device attributes
 * @ops: pointer to the struct uacce_ops
 */
struct uacce_interface {
	char name[UACCE_MAX_NAME_SIZE];
	unsigned int flags;
	const struct uacce_ops *ops;
};

enum uacce_dev_state {
	UACCE_DEV_NORMAL,
	UACCE_DEV_ISOLATE,
};

enum uacce_q_state {
	UACCE_Q_ZOMBIE = 0,
	UACCE_Q_INIT,
	UACCE_Q_STARTED,
};

/**
 * struct uacce_queue
 * @uacce: pointer to uacce
 * @priv: private pointer
 * @wait: wait queue head
 * @list: index into uacce queues list
 * @qfrs: pointer of qfr regions
 * @mutex: protects queue state
 * @state: queue state machine
 * @pasid: pasid associated to the mm
 * @handle: iommu_sva handle returned by iommu_sva_bind_device()
 * @mapping: user space mapping of the queue
 */
struct uacce_queue {
	struct uacce_device *uacce;
	void *priv;
	wait_queue_head_t wait;
	struct list_head list;
	struct uacce_qfile_region *qfrs[UACCE_MAX_REGION];
	struct mutex mutex;
	enum uacce_q_state state;
	u32 pasid;
	struct iommu_sva *handle;
	struct address_space *mapping;
};

/**
 * struct uacce_device
 * @algs: supported algorithms
 * @api_ver: api version
 * @ops: pointer to the struct uacce_ops
 * @qf_pg_num: page numbers of the queue file regions

Annotation

Implementation Notes