drivers/misc/amd-sbi/rmi-core.c

File Facts

System

Linux kernel

Corpus path

drivers/misc/amd-sbi/rmi-core.c

Extension

.c

Size

14790 bytes

Lines

595

Domain

Driver Families

Bucket

drivers/misc

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.
• Touches user memory; correctness depends on fault-safe copying and privilege boundary handling.
• Uses kernel synchronization; read lock ordering, sleepability, and interrupt context assumptions before translating.
• Defines or uses C structs; map object ownership, embedded links, reference counts, and lock ownership.

Dependency Surface

• linux/delay.h
• linux/err.h
• linux/fs.h
• linux/i2c.h
• linux/miscdevice.h
• linux/module.h
• linux/mutex.h
• linux/regmap.h
• rmi-core.h

Detected Declarations

• struct cpu_msr_indata
• struct cpu_msr_indata_ext
• struct cpu_msr_outdata
• function prepare_cpuid_input_message
• function prepare_cpuid_input_message_ext
• function prepare_mca_msr_input_message
• function prepare_mca_msr_input_message_ext
• function sbrmi_get_rev
• function rmi_cpuid_input
• function rmi_cpuid_input_ext
• function rmi_cpuid_read
• function rmi_mcamsr_input
• function rmi_mcamsr_input_ext
• function rmi_mca_msr_read
• function rmi_mailbox_xfer
• function apml_rmi_reg_xfer
• function apml_mailbox_xfer
• function apml_cpuid_xfer
• function apml_mcamsr_xfer
• function sbrmi_ioctl
• function create_misc_rmi_device

Annotated Snippet

static const struct file_operations sbrmi_fops = {
	.owner		= THIS_MODULE,
	.unlocked_ioctl	= sbrmi_ioctl,
	.compat_ioctl	= compat_ptr_ioctl,
};

int create_misc_rmi_device(struct sbrmi_data *data,
			   struct device *dev)
{
	data->sbrmi_misc_dev.name	= devm_kasprintf(dev,
							 GFP_KERNEL,
							 "sbrmi-%x",
							 data->dev_static_addr);
	data->sbrmi_misc_dev.minor	= MISC_DYNAMIC_MINOR;
	data->sbrmi_misc_dev.fops	= &sbrmi_fops;
	data->sbrmi_misc_dev.parent	= dev;
	data->sbrmi_misc_dev.nodename	= devm_kasprintf(dev,
							 GFP_KERNEL,
							 "sbrmi-%x",
							 data->dev_static_addr);
	data->sbrmi_misc_dev.mode	= 0600;

	return misc_register(&data->sbrmi_misc_dev);
}

Annotation

• Immediate include surface: `linux/delay.h`, `linux/err.h`, `linux/fs.h`, `linux/i2c.h`, `linux/miscdevice.h`, `linux/module.h`, `linux/mutex.h`, `linux/regmap.h`.
• Detected declarations: `struct cpu_msr_indata`, `struct cpu_msr_indata_ext`, `struct cpu_msr_outdata`, `function prepare_cpuid_input_message`, `function prepare_cpuid_input_message_ext`, `function prepare_mca_msr_input_message`, `function prepare_mca_msr_input_message_ext`, `function sbrmi_get_rev`, `function rmi_cpuid_input`, `function rmi_cpuid_input_ext`.
• Atlas domain: Driver Families / drivers/misc.
• Implementation status: pattern implementation candidate.
• This snippet crosses the user/kernel memory boundary; validate fault handling and access checks before translating the pattern.
• Synchronization appears in or near this file; preserve lock ordering, sleepability, and interrupt-context constraints.

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.