drivers/ata/ata_piix.c

File Facts

System

Linux kernel

Corpus path

drivers/ata/ata_piix.c

Extension

.c

Size

51545 bytes

Lines

1970

Domain

Driver Families

Bucket

drivers/ata

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.
• 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/kernel.h
• linux/module.h
• linux/pci.h
• linux/init.h
• linux/blkdev.h
• linux/delay.h
• linux/device.h
• linux/gfp.h
• scsi/scsi_host.h
• linux/libata.h
• linux/dmi.h
• trace/events/libata.h

Detected Declarations

• struct piix_map_db
• struct piix_host_priv
• struct ich_laptop
• enum piix_controller_ids
• function piix_port_start
• function None
• function None
• function piix_set_timings
• function None
• function None
• function None
• function None
• function piix_sidpr_sel
• function piix_sidpr_scr_read
• function piix_sidpr_scr_write
• function piix_sidpr_set_lpm
• function piix_irq_check
• function piix_broken_suspend
• function piix_pci_device_suspend
• function piix_pci_device_resume
• function piix_vmw_bmdma_status
• function piix_disable_ahci
• function piix_check_450nx_errata
• function piix_init_pcs
• function piix_no_sidpr
• function piix_init_sidpr
• function piix_iocfg_bit18_quirk
• function piix_broken_system_poweroff
• function piix_ignore_devices_quirk
• function layer
• function piix_remove_one
• function piix_init
• function piix_exit
• module init piix_init

Annotated Snippet

static struct pci_driver piix_pci_driver = {
	.name			= DRV_NAME,
	.id_table		= piix_pci_tbl,
	.probe			= piix_init_one,
	.remove			= piix_remove_one,
#ifdef CONFIG_PM_SLEEP
	.suspend		= piix_pci_device_suspend,
	.resume			= piix_pci_device_resume,
#endif
};

static int __init piix_init(void)
{
	int rc;

	rc = pci_register_driver(&piix_pci_driver);
	if (rc)
		return rc;

	in_module_init = 0;

	return 0;
}

static void __exit piix_exit(void)
{
	pci_unregister_driver(&piix_pci_driver);
}

module_init(piix_init);
module_exit(piix_exit);

Annotation

• Immediate include surface: `linux/kernel.h`, `linux/module.h`, `linux/pci.h`, `linux/init.h`, `linux/blkdev.h`, `linux/delay.h`, `linux/device.h`, `linux/gfp.h`.
• Detected declarations: `struct piix_map_db`, `struct piix_host_priv`, `struct ich_laptop`, `enum piix_controller_ids`, `function piix_port_start`, `function None`, `function None`, `function piix_set_timings`, `function None`, `function None`.
• Atlas domain: Driver Families / drivers/ata.
• Implementation status: pattern 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.