drivers/infiniband/hw/erdma/erdma_cm.h

Source file repositories/reference/linux-study-clean/drivers/infiniband/hw/erdma/erdma_cm.h

File Facts

System
Linux kernel
Corpus path
drivers/infiniband/hw/erdma/erdma_cm.h
Extension
.h
Size
3981 bytes
Lines
168
Domain
Driver Families
Bucket
drivers/infiniband
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 mpa_rr_params {
	__be16 bits;
	__be16 pd_len;
};

/*
 * MPA request/response Hdr bits & fields
 */
enum {
	MPA_RR_FLAG_MARKERS = cpu_to_be16(0x8000),
	MPA_RR_FLAG_CRC = cpu_to_be16(0x4000),
	MPA_RR_FLAG_REJECT = cpu_to_be16(0x2000),
	MPA_RR_RESERVED = cpu_to_be16(0x1f00),
	MPA_RR_MASK_REVISION = cpu_to_be16(0x00ff)
};

/*
 * MPA request/reply header
 */
struct mpa_rr {
	u8 key[16];
	struct mpa_rr_params params;
};

struct erdma_mpa_ext {
	__be32 cookie;
	__be32 bits;
};

enum {
	MPA_EXT_FLAG_CC = cpu_to_be32(0x0000000f),
};

struct erdma_mpa_info {
	struct mpa_rr hdr; /* peer mpa hdr in host byte order */
	struct erdma_mpa_ext ext_data;
	char *pdata;
	int bytes_rcvd;
};

struct erdma_sk_upcalls {
	void (*sk_state_change)(struct sock *sk);
	void (*sk_data_ready)(struct sock *sk, int bytes);
	void (*sk_error_report)(struct sock *sk);
};

struct erdma_dev;

enum erdma_cep_state {
	ERDMA_EPSTATE_IDLE = 1,
	ERDMA_EPSTATE_LISTENING,
	ERDMA_EPSTATE_CONNECTING,
	ERDMA_EPSTATE_AWAIT_MPAREQ,
	ERDMA_EPSTATE_RECVD_MPAREQ,
	ERDMA_EPSTATE_AWAIT_MPAREP,
	ERDMA_EPSTATE_RDMA_MODE,
	ERDMA_EPSTATE_CLOSED
};

struct erdma_cep {
	struct iw_cm_id *cm_id;
	struct erdma_dev *dev;
	struct list_head devq;
	spinlock_t lock;
	struct kref ref;
	int in_use;
	wait_queue_head_t waitq;
	enum erdma_cep_state state;

	struct list_head listenq;
	struct erdma_cep *listen_cep;

	struct erdma_qp *qp;
	struct socket *sock;

	struct erdma_cm_work *mpa_timer;
	struct list_head work_freelist;

	struct erdma_mpa_info mpa;
	int ord;
	int ird;

	int pd_len;
	/* hold user's private data. */
	void *private_data;

	/* Saved upcalls of socket llp.sock */
	void (*sk_state_change)(struct sock *sk);
	void (*sk_data_ready)(struct sock *sk);
	void (*sk_error_report)(struct sock *sk);

Annotation

Implementation Notes