drivers/ufs/core/ufs_bsg.c

File Facts

System

Linux kernel

Corpus path

drivers/ufs/core/ufs_bsg.c

Extension

.c

Size

6654 bytes

Lines

276

Domain

Driver Families

Bucket

drivers/ufs

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.

• 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.
• 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/bsg-lib.h
• linux/dma-mapping.h
• scsi/scsi.h
• scsi/scsi_host.h
• ufs_bsg.h
• ufs/ufshcd.h
• ufshcd-priv.h

Detected Declarations

• function Copyright
• function ufs_bsg_alloc_desc_buffer
• function ufs_bsg_exec_advanced_rpmb_req
• function ufs_bsg_request
• function ufs_bsg_remove
• function ufs_bsg_node_release
• function ufs_bsg_probe

Annotated Snippet

ret = device_add(bsg_dev);
	if (ret)
		goto out;

	q = bsg_setup_queue(bsg_dev, dev_name(bsg_dev), NULL, ufs_bsg_request,
			NULL, 0);
	if (IS_ERR(q)) {
		ret = PTR_ERR(q);
		device_del(bsg_dev);
		goto out;
	}

	hba->bsg_queue = q;

	return 0;

out:
	dev_err(bsg_dev, "fail to initialize a bsg dev %d\n", shost->host_no);
	put_device(bsg_dev);
	return ret;
}

Annotation

• Immediate include surface: `linux/bsg-lib.h`, `linux/dma-mapping.h`, `scsi/scsi.h`, `scsi/scsi_host.h`, `ufs_bsg.h`, `ufs/ufshcd.h`, `ufshcd-priv.h`.
• Detected declarations: `function Copyright`, `function ufs_bsg_alloc_desc_buffer`, `function ufs_bsg_exec_advanced_rpmb_req`, `function ufs_bsg_request`, `function ufs_bsg_remove`, `function ufs_bsg_node_release`, `function ufs_bsg_probe`.
• Atlas domain: Driver Families / drivers/ufs.
• Implementation status: source implementation candidate.
• 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.