drivers/net/ethernet/mellanox/mlx5/core/lib/gid.c

File Facts

System

Linux kernel

Corpus path

drivers/net/ethernet/mellanox/mlx5/core/lib/gid.c

Extension

.c

Size

5224 bytes

Lines

153

Domain

Driver Families

Bucket

drivers/net

Inferred role

Driver Families: exported/initcall integration point

Status

integration 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.

• 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.
• Exports symbols or registers init work; inspect boot/module ordering and who consumes the exported contract.
• Defines or uses C structs; map object ownership, embedded links, reference counts, and lock ownership.

Dependency Surface

• linux/mlx5/driver.h
• linux/etherdevice.h
• linux/idr.h
• mlx5_core.h
• lib/mlx5.h

Detected Declarations

• function Copyright
• function mlx5_cleanup_reserved_gids
• function mlx5_core_reserve_gids
• function mlx5_core_unreserve_gids
• function mlx5_core_reserved_gid_alloc
• function mlx5_core_reserved_gid_free
• function mlx5_core_reserved_gids_count
• function mlx5_core_roce_gid_set
• export mlx5_core_reserved_gids_count
• export mlx5_core_roce_gid_set

Annotated Snippet

if (vlan) {
			MLX5_SET_RA(in_addr, vlan_valid, 1);
			MLX5_SET_RA(in_addr, vlan_id, vlan_id);
		}

		ether_addr_copy(addr_mac, mac);
		memcpy(addr_l3_addr, gid, gidsz);
	}
	MLX5_SET_RA(in_addr, roce_version, roce_version);
	MLX5_SET_RA(in_addr, roce_l3_type, roce_l3_type);

	if (MLX5_CAP_GEN(dev, num_vhca_ports) > 0)
		MLX5_SET(set_roce_address_in, in, vhca_port_num, port_num);

	MLX5_SET(set_roce_address_in, in, roce_address_index, index);
	MLX5_SET(set_roce_address_in, in, opcode, MLX5_CMD_OP_SET_ROCE_ADDRESS);
	return mlx5_cmd_exec_in(dev, set_roce_address, in);
}
EXPORT_SYMBOL(mlx5_core_roce_gid_set);

Annotation

• Immediate include surface: `linux/mlx5/driver.h`, `linux/etherdevice.h`, `linux/idr.h`, `mlx5_core.h`, `lib/mlx5.h`.
• Detected declarations: `function Copyright`, `function mlx5_cleanup_reserved_gids`, `function mlx5_core_reserve_gids`, `function mlx5_core_unreserve_gids`, `function mlx5_core_reserved_gid_alloc`, `function mlx5_core_reserved_gid_free`, `function mlx5_core_reserved_gids_count`, `function mlx5_core_roce_gid_set`, `export mlx5_core_reserved_gids_count`, `export mlx5_core_roce_gid_set`.
• Atlas domain: Driver Families / drivers/net.
• Implementation status: integration implementation candidate.

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.