drivers/nvme/target/pci-epf.c

File Facts

System

Linux kernel

Corpus path

drivers/nvme/target/pci-epf.c

Extension

.c

Size

66510 bytes

Lines

2649

Domain

Representative Device Path

Bucket

PCIe NVMe Storage Path

Inferred role

Representative Device Path: exported/initcall integration point

Status

integration implementation candidate

Why This File Exists

Part of the selected hardware vertical slice: PCI discovery, driver binding, NVMe queues, block requests, DMA, interrupts, and completion.

• Part of the selected hardware vertical slice: PCI discovery, driver binding, NVMe queues, block requests, DMA, interrupts, and completion.
• Exports symbols or registers init work; inspect boot/module ordering and who consumes the exported contract.
• 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/delay.h
• linux/dmaengine.h
• linux/io.h
• linux/mempool.h
• linux/module.h
• linux/mutex.h
• linux/nvme.h
• linux/pci_ids.h
• linux/pci-epc.h
• linux/pci-epf.h
• linux/pci_regs.h
• linux/slab.h
• nvmet.h

Detected Declarations

• struct nvmet_pci_epf_irq_vector
• struct nvmet_pci_epf_queue
• struct nvmet_pci_epf_segment
• struct nvmet_pci_epf_iod
• struct nvmet_pci_epf_ctrl
• struct nvmet_pci_epf
• struct nvmet_pci_epf_dma_filter
• enum nvmet_pci_epf_queue_flags
• function nvmet_pci_epf_bar_read32
• function nvmet_pci_epf_bar_write32
• function nvmet_pci_epf_bar_read64
• function nvmet_pci_epf_bar_write64
• function nvmet_pci_epf_mem_map
• function nvmet_pci_epf_mem_unmap
• function nvmet_pci_epf_dma_filter
• function nvmet_pci_epf_init_dma
• function nvmet_pci_epf_deinit_dma
• function nvmet_pci_epf_dma_transfer
• function nvmet_pci_epf_mmio_transfer
• function nvmet_pci_epf_transfer_seg
• function nvmet_pci_epf_transfer
• function nvmet_pci_epf_alloc_irq_vectors
• function nvmet_pci_epf_free_irq_vectors
• function nvmet_pci_epf_find_irq_vector
• function nvmet_pci_epf_add_irq_vector
• function nvmet_pci_epf_remove_irq_vector
• function nvmet_pci_epf_should_raise_irq
• function nvmet_pci_epf_raise_irq
• function nvmet_pci_epf_alloc_iod
• function nvmet_pci_epf_alloc_iod_data_segs
• function nvmet_pci_epf_free_iod
• function nvmet_pci_epf_transfer_iod_data
• function nvmet_pci_epf_prp_ofst
• function nvmet_pci_epf_prp_size
• function nvmet_pci_epf_get_prp_list
• function nvmet_pci_epf_iod_parse_prp_list
• function nvmet_pci_epf_iod_parse_prp_simple
• function nvmet_pci_epf_iod_parse_prps
• function nvmet_pci_epf_get_sgl_segment
• function nvmet_pci_epf_iod_parse_sgl_segments
• function nvmet_pci_epf_iod_parse_sgls
• function nvmet_pci_epf_alloc_iod_data_buf
• function for_each_sgtable_sg
• function nvmet_pci_epf_complete_iod
• function nvmet_pci_epf_drain_queue
• function nvmet_pci_epf_add_port
• function nvmet_pci_epf_remove_port
• function nvmet_pci_epf_find_port

Annotated Snippet

module_init(nvmet_pci_epf_init_module);
module_exit(nvmet_pci_epf_cleanup_module);

MODULE_DESCRIPTION("NVMe PCI Endpoint Function target driver");
MODULE_AUTHOR("Damien Le Moal <dlemoal@kernel.org>");
MODULE_LICENSE("GPL");

Annotation

• Immediate include surface: `linux/delay.h`, `linux/dmaengine.h`, `linux/io.h`, `linux/mempool.h`, `linux/module.h`, `linux/mutex.h`, `linux/nvme.h`, `linux/pci_ids.h`.
• Detected declarations: `struct nvmet_pci_epf_irq_vector`, `struct nvmet_pci_epf_queue`, `struct nvmet_pci_epf_segment`, `struct nvmet_pci_epf_iod`, `struct nvmet_pci_epf_ctrl`, `struct nvmet_pci_epf`, `struct nvmet_pci_epf_dma_filter`, `enum nvmet_pci_epf_queue_flags`, `function nvmet_pci_epf_bar_read32`, `function nvmet_pci_epf_bar_write32`.
• Atlas domain: Representative Device Path / PCIe NVMe Storage Path.
• Implementation status: integration 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.