arch/um/drivers/vector_kern.h

Source file repositories/reference/linux-study-clean/arch/um/drivers/vector_kern.h

File Facts

System
Linux kernel
Corpus path
arch/um/drivers/vector_kern.h
Extension
.h
Size
2963 bytes
Lines
140
Domain
Architecture Layer
Bucket
arch/um
Inferred role
Architecture Layer: implementation source
Status
source implementation candidate

Why This File Exists

CPU and platform-specific kernel glue: boot entry, traps, syscall entry, interrupts, page tables, context switch, and low-level barriers.

Dependency Surface

Detected Declarations

Annotated Snippet

struct vector_queue {
	struct mmsghdr *mmsg_vector;
	void **skbuff_vector;
	 /* backlink to device which owns us */
	struct net_device *dev;
	spinlock_t head_lock;
	spinlock_t tail_lock;
	atomic_t queue_depth;
	int head, tail, max_depth, max_iov_frags;
	short options;
};

struct vector_estats {
	uint64_t rx_queue_max;
	uint64_t rx_queue_running_average;
	uint64_t tx_queue_max;
	uint64_t tx_queue_running_average;
	uint64_t rx_encaps_errors;
	uint64_t tx_timeout_count;
	uint64_t tx_restart_queue;
	uint64_t tx_kicks;
	uint64_t tx_flow_control_xon;
	uint64_t tx_flow_control_xoff;
	uint64_t rx_csum_offload_good;
	uint64_t rx_csum_offload_errors;
	uint64_t sg_ok;
	uint64_t sg_linearized;
};

#define VERIFY_HEADER_NOK -1
#define VERIFY_HEADER_OK 0
#define VERIFY_CSUM_OK 1

struct vector_private {
	struct list_head list;
	struct net_device *dev;
	struct napi_struct		napi	____cacheline_aligned;

	int unit;

	/* Timeout timer in TX */

	struct timer_list tl;

	/* Scheduled "remove device" work */
	struct work_struct reset_tx;
	struct vector_fds *fds;

	struct vector_queue *rx_queue;
	struct vector_queue *tx_queue;

	int rx_irq;
	int tx_irq;

	struct arglist *parsed;

	void *transport_data; /* transport specific params if needed */

	int max_packet;
	int req_size; /* different from max packet - used for TSO */
	int headroom;

	int options;

	/* remote address if any - some transports will leave this as null */

	int header_size;
	int rx_header_size;
	int coalesce;

	void *header_rxbuffer;
	void *header_txbuffer;

	int (*form_header)(uint8_t *header,
		struct sk_buff *skb, struct vector_private *vp);
	int (*verify_header)(uint8_t *header,
		struct sk_buff *skb, struct vector_private *vp);

	spinlock_t stats_lock;

	bool rexmit_scheduled;
	bool opened;
	bool in_write_poll;
	bool in_error;

	/* guest allowed to use ethtool flash to load bpf */
	bool bpf_via_flash;

	/* ethtool stats */

Annotation

Implementation Notes