include/linux/mlx4/qp.h

File Facts

System

Linux kernel

Corpus path

include/linux/mlx4/qp.h

Extension

.h

Size

12459 bytes

Lines

509

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.

• Core operating-system implementation surface: boot, tasks, memory, VFS, syscall-facing interfaces, synchronization, credentials, and isolation.
• Uses kernel synchronization; read lock ordering, sleepability, and interrupt context assumptions before translating.
• Defines or uses C structs; map object ownership, embedded links, reference counts, and lock ownership.

Dependency Surface

• linux/types.h
• linux/if_ether.h
• linux/mlx4/device.h

Detected Declarations

• struct mlx4_rss_context
• struct mlx4_qp_path
• struct mlx4_qp_context
• struct mlx4_update_qp_context
• struct mlx4_wqe_ctrl_seg
• struct mlx4_wqe_mlx_seg
• struct mlx4_wqe_datagram_seg
• struct mlx4_wqe_lso_seg
• struct mlx4_wqe_bind_seg
• struct mlx4_wqe_fmr_seg
• struct mlx4_wqe_fmr_ext_seg
• struct mlx4_wqe_local_inval_seg
• struct mlx4_wqe_raddr_seg
• struct mlx4_wqe_atomic_seg
• struct mlx4_wqe_masked_atomic_seg
• struct mlx4_wqe_data_seg
• struct mlx4_wqe_inline_seg
• struct mlx4_update_qp_params
• enum mlx4_qp_optpar
• enum mlx4_qp_state
• enum mlx4_wqe_bind_seg_flags2
• enum mlx4_update_qp_attr
• enum mlx4_update_qp_params_flags
• function folded_qp

Annotated Snippet

struct mlx4_rss_context {
	__be32			base_qpn;
	__be32			default_qpn;
	u16			reserved;
	u8			hash_fn;
	u8			flags;
	__be32			rss_key[MLX4_EN_RSS_KEY_SIZE / sizeof(__be32)];
	__be32			base_qpn_udp;
};

struct mlx4_qp_path {
	u8			fl;
	union {
		u8			vlan_control;
		u8			control;
	};
	u8			disable_pkey_check;
	u8			pkey_index;
	u8			counter_index;
	u8			grh_mylmc;
	__be16			rlid;
	u8			ackto;
	u8			mgid_index;
	u8			static_rate;
	u8			hop_limit;
	__be32			tclass_flowlabel;
	u8			rgid[16];
	u8			sched_queue;
	u8			vlan_index;
	u8			feup;
	u8			fvl_rx;
	u8			reserved4[2];
	u8			dmac[ETH_ALEN];
};

enum { /* fl */
	MLX4_FL_CV	= 1 << 6,
	MLX4_FL_SV	= 1 << 5,
	MLX4_FL_ETH_HIDE_CQE_VLAN	= 1 << 2,
	MLX4_FL_ETH_SRC_CHECK_MC_LB	= 1 << 1,
	MLX4_FL_ETH_SRC_CHECK_UC_LB	= 1 << 0,
};

enum { /* control */
	MLX4_CTRL_ETH_SRC_CHECK_IF_COUNTER	= 1 << 7,
};

enum { /* vlan_control */
	MLX4_VLAN_CTRL_ETH_TX_BLOCK_TAGGED	= 1 << 6,
	MLX4_VLAN_CTRL_ETH_TX_BLOCK_PRIO_TAGGED	= 1 << 5, /* 802.1p priority tag */
	MLX4_VLAN_CTRL_ETH_TX_BLOCK_UNTAGGED	= 1 << 4,
	MLX4_VLAN_CTRL_ETH_RX_BLOCK_TAGGED	= 1 << 2,
	MLX4_VLAN_CTRL_ETH_RX_BLOCK_PRIO_TAGGED	= 1 << 1, /* 802.1p priority tag */
	MLX4_VLAN_CTRL_ETH_RX_BLOCK_UNTAGGED	= 1 << 0
};

enum { /* feup */
	MLX4_FEUP_FORCE_ETH_UP          = 1 << 6, /* force Eth UP */
	MLX4_FSM_FORCE_ETH_SRC_MAC      = 1 << 5, /* force Source MAC */
	MLX4_FVL_FORCE_ETH_VLAN         = 1 << 3  /* force Eth vlan */
};

enum { /* fvl_rx */
	MLX4_FVL_RX_FORCE_ETH_VLAN      = 1 << 0 /* enforce Eth rx vlan */
};

struct mlx4_qp_context {
	__be32			flags;
	__be32			pd;
	u8			mtu_msgmax;
	u8			rq_size_stride;
	u8			sq_size_stride;
	u8			rlkey_roce_mode;
	__be32			usr_page;
	__be32			local_qpn;
	__be32			remote_qpn;
	struct			mlx4_qp_path pri_path;
	struct			mlx4_qp_path alt_path;
	__be32			params1;
	u32			reserved1;
	__be32			next_send_psn;
	__be32			cqn_send;
	__be16                  roce_entropy;
	__be16                  reserved2[3];
	__be32			last_acked_psn;
	__be32			ssn;
	__be32			params2;
	__be32			rnr_nextrecvpsn;
	__be32			xrcd;
	__be32			cqn_recv;

Annotation

• Immediate include surface: `linux/types.h`, `linux/if_ether.h`, `linux/mlx4/device.h`.
• Detected declarations: `struct mlx4_rss_context`, `struct mlx4_qp_path`, `struct mlx4_qp_context`, `struct mlx4_update_qp_context`, `struct mlx4_wqe_ctrl_seg`, `struct mlx4_wqe_mlx_seg`, `struct mlx4_wqe_datagram_seg`, `struct mlx4_wqe_lso_seg`, `struct mlx4_wqe_bind_seg`, `struct mlx4_wqe_fmr_seg`.
• Atlas domain: Core OS / Core Kernel Interface.
• Implementation status: source implementation candidate.
• Synchronization appears in or near this file; preserve lock ordering, sleepability, and interrupt-context constraints.

Implementation Notes

• This generated page is the file-by-file coverage layer; curated subsystem chapters should link here when they synthesize a multi-file control flow.
• Core OS pages should be promoted from atlas-only to deep-reviewed when they explain data structures, invariants, locking, lifecycle, and C implementation snippets.
• Driver-family pages are intentionally pattern-oriented unless they are part of the selected PCIe/NVMe representative device path.