Documentation/misc-devices/amd-sbi.rst

File Facts

System

Linux kernel

Corpus path

Documentation/misc-devices/amd-sbi.rst

Extension

.rst

Size

3074 bytes

Lines

102

Domain

Support Tooling And Documentation

Bucket

Documentation

Inferred role

Support Tooling And Documentation: documentation

Status

atlas-only

Why This File Exists

Repository support layer: documentation, build tooling, samples, user-space helper tools, generated initramfs support, licenses, and validation utilities.

• Repository support layer: documentation, build tooling, samples, user-space helper tools, generated initramfs support, licenses, and validation utilities.
• Defines or uses C structs; map object ownership, embedded links, reference counts, and lock ownership.

Dependency Surface

• uapi/misc/amd-apml.h

Detected Declarations

• No top-level syscall, struct, function, initcall, or export declaration detected by the generator.

Annotated Snippet

if (file < 0) {
    /* ERROR HANDLING */
    exit(1);
  }

The following IOCTLs are defined:

``#define SB_BASE_IOCTL_NR      	0xF9``
``#define SBRMI_IOCTL_MBOX_CMD		_IOWR(SB_BASE_IOCTL_NR, 0, struct apml_mbox_msg)``
``#define SBRMI_IOCTL_CPUID_CMD		_IOWR(SB_BASE_IOCTL_NR, 1, struct apml_cpuid_msg)``
``#define SBRMI_IOCTL_MCAMSR_CMD	_IOWR(SB_BASE_IOCTL_NR, 2, struct apml_mcamsr_msg)``
``#define SBRMI_IOCTL_REG_XFER_CMD	_IOWR(SB_BASE_IOCTL_NR, 3, struct apml_reg_xfer_msg)``


User space C-APIs are made available by esmi_oob_library, hosted at
[2]_ which is provided by the E-SMS project [3]_.

.. [2] https://github.com/amd/esmi_oob_library
.. [3] https://www.amd.com/en/developer/e-sms.html

Annotation

• Immediate include surface: `uapi/misc/amd-apml.h`.
• Atlas domain: Support Tooling And Documentation / Documentation.
• Implementation status: atlas-only.

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.