drivers/platform/x86/intel_scu_ipcutil.c

File Facts

System

Linux kernel

Corpus path

drivers/platform/x86/intel_scu_ipcutil.c

Extension

.c

Size

3475 bytes

Lines

153

Domain

Driver Families

Bucket

drivers/platform

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/errno.h
• linux/fcntl.h
• linux/fs.h
• linux/kernel.h
• linux/module.h
• linux/sched.h
• linux/slab.h
• linux/types.h
• linux/uaccess.h
• linux/platform_data/x86/intel_scu_ipc.h

Detected Declarations

• struct scu_ipc_data
• function scu_reg_access
• function scu_ipc_ioctl
• function scu_ipc_open
• function scu_ipc_release
• function ipc_module_init
• function ipc_module_exit
• module init ipc_module_init

Annotated Snippet

static const struct file_operations scu_ipc_fops = {
	.unlocked_ioctl = scu_ipc_ioctl,
	.open = scu_ipc_open,
	.release = scu_ipc_release,
};

static int __init ipc_module_init(void)
{
	major = register_chrdev(0, "intel_mid_scu", &scu_ipc_fops);
	if (major < 0)
		return major;

	return 0;
}

static void __exit ipc_module_exit(void)
{
	unregister_chrdev(major, "intel_mid_scu");
}

module_init(ipc_module_init);
module_exit(ipc_module_exit);

MODULE_LICENSE("GPL v2");
MODULE_DESCRIPTION("Utility driver for intel scu ipc");
MODULE_AUTHOR("Sreedhara <sreedhara.ds@intel.com>");

Annotation

• Immediate include surface: `linux/errno.h`, `linux/fcntl.h`, `linux/fs.h`, `linux/kernel.h`, `linux/module.h`, `linux/sched.h`, `linux/slab.h`, `linux/types.h`.
• Detected declarations: `struct scu_ipc_data`, `function scu_reg_access`, `function scu_ipc_ioctl`, `function scu_ipc_open`, `function scu_ipc_release`, `function ipc_module_init`, `function ipc_module_exit`, `module init ipc_module_init`.
• Atlas domain: Driver Families / drivers/platform.
• 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.