drivers/net/ethernet/mellanox/mlxsw/pci.c

File Facts

System

Linux kernel

Corpus path

drivers/net/ethernet/mellanox/mlxsw/pci.c

Extension

.c

Size

70038 bytes

Lines

2547

Domain

Driver Families

Bucket

drivers/net

Inferred role

Driver Families: operation-table or driver-model contract

Status

pattern 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.
• Defines an operation table; this is where Linux turns generic core objects into subsystem-specific behavior.
• Uses kernel synchronization; read lock ordering, sleepability, and interrupt context assumptions before translating.
• Touches IRQ or DMA behavior; this matters for the representative real-device path.
• Allocates kernel memory; connect allocation flags and lifetime to context constraints.
• Defines or uses C structs; map object ownership, embedded links, reference counts, and lock ownership.

Dependency Surface

• linux/kernel.h
• linux/module.h
• linux/export.h
• linux/err.h
• linux/device.h
• linux/pci.h
• linux/interrupt.h
• linux/types.h
• linux/skbuff.h
• linux/if_vlan.h
• linux/log2.h
• linux/string.h
• net/page_pool/helpers.h
• pci_hw.h
• pci.h
• core.h
• cmd.h
• port.h
• resources.h
• txheader.h

Detected Declarations

• struct mlxsw_pci_mem_item
• struct mlxsw_pci_queue_elem_info
• struct mlxsw_pci_queue
• struct mlxsw_pci_queue_type_group
• struct mlxsw_pci
• struct mlxsw_pci_queue_ops
• enum mlxsw_pci_queue_type
• enum mlxsw_pci_cq_type
• function mlxsw_pci_napi_devs_init
• function mlxsw_pci_napi_devs_fini
• function mlxsw_pci_queue_elem_info_get
• function mlxsw_pci_queue_elem_info_producer_get
• function mlxsw_pci_queue_elem_info_consumer_get
• function mlxsw_pci_elem_hw_owned
• function mlxsw_pci_queue_type_group_get
• function __mlxsw_pci_queue_get
• function __mlxsw_pci_queue_doorbell_set
• function __mlxsw_pci_queue_doorbell_arm_set
• function mlxsw_pci_queue_doorbell_producer_ring
• function mlxsw_pci_queue_doorbell_consumer_ring
• function mlxsw_pci_queue_doorbell_arm_consumer_ring
• function __mlxsw_pci_queue_page_get
• function mlxsw_pci_sdq_init
• function mlxsw_pci_sdq_fini
• function SKB_DATA_ALIGN
• function mlxsw_pci_wqe_frag_map
• function mlxsw_pci_wqe_frag_unmap
• function mlxsw_pci_rdq_page_alloc
• function mlxsw_pci_rdq_page_free
• function mlxsw_pci_num_sg_entries_get
• function mlxsw_pci_elem_info_pages_ref_store
• function mlxsw_pci_rdq_pages_alloc
• function mlxsw_pci_rdq_pages_recycle
• function mlxsw_pci_rdq_init
• function mlxsw_pci_rdq_fini
• function mlxsw_pci_cq_pre_init
• function mlxsw_pci_read32_off
• function mlxsw_pci_skb_cb_ts_set
• function mlxsw_pci_cqe_sdq_handle
• function mlxsw_pci_cqe_rdq_md_tx_port_init
• function mlxsw_pci_cqe_rdq_md_init
• function mlxsw_pci_cqe_rdq_handle
• function mlxsw_pci_cq_cqe_to_handle
• function mlxsw_pci_napi_poll_cq_rx
• function mlxsw_pci_napi_poll_cq_tx
• function mlxsw_pci_cq_type
• function mlxsw_pci_cq_napi_setup
• function mlxsw_pci_cq_napi_teardown

Annotated Snippet

int mlxsw_pci_driver_register(struct pci_driver *pci_driver)
{
	pci_driver->probe = mlxsw_pci_probe;
	pci_driver->remove = mlxsw_pci_remove;
	pci_driver->shutdown = mlxsw_pci_remove;
	pci_driver->err_handler = &mlxsw_pci_err_handler;
	return pci_register_driver(pci_driver);
}
EXPORT_SYMBOL(mlxsw_pci_driver_register);

void mlxsw_pci_driver_unregister(struct pci_driver *pci_driver)
{
	pci_unregister_driver(pci_driver);
}
EXPORT_SYMBOL(mlxsw_pci_driver_unregister);

MODULE_LICENSE("Dual BSD/GPL");
MODULE_AUTHOR("Jiri Pirko <jiri@mellanox.com>");
MODULE_DESCRIPTION("Mellanox switch PCI interface driver");

Annotation

• Immediate include surface: `linux/kernel.h`, `linux/module.h`, `linux/export.h`, `linux/err.h`, `linux/device.h`, `linux/pci.h`, `linux/interrupt.h`, `linux/types.h`.
• Detected declarations: `struct mlxsw_pci_mem_item`, `struct mlxsw_pci_queue_elem_info`, `struct mlxsw_pci_queue`, `struct mlxsw_pci_queue_type_group`, `struct mlxsw_pci`, `struct mlxsw_pci_queue_ops`, `enum mlxsw_pci_queue_type`, `enum mlxsw_pci_cq_type`, `function mlxsw_pci_napi_devs_init`, `function mlxsw_pci_napi_devs_fini`.
• Atlas domain: Driver Families / drivers/net.
• Implementation status: pattern implementation candidate.
• Synchronization appears in or near this file; preserve lock ordering, sleepability, and interrupt-context constraints.
• IRQ or DMA behavior appears here, which is relevant to the selected PCIe/NVMe device path.

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.