drivers/dma/fsl-dpaa2-qdma/dpdmai.h

Source file repositories/reference/linux-study-clean/drivers/dma/fsl-dpaa2-qdma/dpdmai.h

File Facts

System
Linux kernel
Corpus path
drivers/dma/fsl-dpaa2-qdma/dpdmai.h
Extension
.h
Size
6014 bytes
Lines
179
Domain
Driver Families
Bucket
drivers/dma
Inferred role
Driver Families: implementation source
Status
source implementation candidate

Why This File Exists

Repeatable hardware-adapter layer. Deep compatibility for every driver is out of scope; this atlas records patterns, probe lifecycles, bus glue, IRQ/DMA usage, and links back to core abstractions.

Dependency Surface

Detected Declarations

Annotated Snippet

struct dpdmai_cfg {
	u8 num_queues;
	u8 priorities[DPDMAI_PRIO_NUM];
};

/**
 * struct dpdmai_attr - Structure representing DPDMAI attributes
 * @id: DPDMAI object ID
 * @version: DPDMAI version
 * @version.major: DPDMAI major version
 * @version.minor: DPDMAI minor version
 * @num_of_priorities: number of priorities
 * @num_of_queues: number of the DMA queues
 */
struct dpdmai_attr {
	int	id;
	struct {
		u16 major;
		u16 minor;
	} version;
	u8 num_of_priorities;
	u8 num_of_queues;
};

/**
 * enum dpdmai_dest - DPDMAI destination types
 * @DPDMAI_DEST_NONE: Unassigned destination; The queue is set in parked mode
 *	and does not generate FQDAN notifications; user is expected to dequeue
 *	from the queue based on polling or other user-defined method
 * @DPDMAI_DEST_DPIO: The queue is set in schedule mode and generates FQDAN
 *	notifications to the specified DPIO; user is expected to dequeue
 *	from the queue only after notification is received
 * @DPDMAI_DEST_DPCON: The queue is set in schedule mode and does not generate
 *	FQDAN notifications, but is connected to the specified DPCON object;
 *	user is expected to dequeue from the DPCON channel
 */
enum dpdmai_dest {
	DPDMAI_DEST_NONE = 0,
	DPDMAI_DEST_DPIO = 1,
	DPDMAI_DEST_DPCON = 2
};

/**
 * struct dpdmai_dest_cfg - Structure representing DPDMAI destination parameters
 * @dest_type: Destination type
 * @dest_id: Either DPIO ID or DPCON ID, depending on the destination type
 * @priority: Priority selection within the DPIO or DPCON channel; valid values
 *	are 0-1 or 0-7, depending on the number of priorities in that
 *	channel; not relevant for 'DPDMAI_DEST_NONE' option
 */
struct dpdmai_dest_cfg {
	enum dpdmai_dest dest_type;
	int dest_id;
	u8 priority;
};

/**
 * struct dpdmai_rx_queue_cfg - DPDMAI RX queue configuration
 * @options: Flags representing the suggested modifications to the queue;
 *	Use any combination of 'DPDMAI_QUEUE_OPT_<X>' flags
 * @user_ctx: User context value provided in the frame descriptor of each
 *	dequeued frame;
 *	valid only if 'DPDMAI_QUEUE_OPT_USER_CTX' is contained in 'options'
 * @dest_cfg: Queue destination parameters;
 *	valid only if 'DPDMAI_QUEUE_OPT_DEST' is contained in 'options'
 */
struct dpdmai_rx_queue_cfg {
	struct dpdmai_dest_cfg dest_cfg;
	u32 options;
	u64 user_ctx;

};

/**
 * struct dpdmai_rx_queue_attr - Structure representing attributes of Rx queues
 * @user_ctx:  User context value provided in the frame descriptor of each
 *	 dequeued frame
 * @dest_cfg: Queue destination configuration
 * @fqid: Virtual FQID value to be used for dequeue operations
 */
struct dpdmai_rx_queue_attr {
	struct dpdmai_dest_cfg	dest_cfg;
	u64 user_ctx;
	u32 fqid;
};

struct dpdmai_tx_queue_attr {
	u32 fqid;
};

Annotation

Implementation Notes