drivers/scsi/am53c974.c

File Facts

System

Linux kernel

Corpus path

drivers/scsi/am53c974.c

Extension

.c

Size

13037 bytes

Lines

543

Domain

Driver Families

Bucket

drivers/scsi

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 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/init.h
• linux/delay.h
• linux/pci.h
• linux/interrupt.h
• scsi/scsi_host.h
• esp_scsi.h

Detected Declarations

• struct pci_esp_priv
• function pci_esp_write8
• function pci_esp_read8
• function pci_esp_write32
• function pci_esp_irq_pending
• function pci_esp_reset_dma
• function pci_esp_dma_invalidate
• function pci_esp_dma_error
• function pci_esp_send_dma_cmd
• function pci_esp_dma_length_limit
• function dc390_eeprom_prepare_read
• function dc390_eeprom_get_data
• function dc390_read_eeprom
• function dc390_check_eeprom
• function pci_esp_probe_one
• function pci_esp_remove_one

Annotated Snippet

static struct pci_driver am53c974_driver = {
	.name           = DRV_MODULE_NAME,
	.id_table       = am53c974_pci_tbl,
	.probe          = pci_esp_probe_one,
	.remove         = pci_esp_remove_one,
};

module_pci_driver(am53c974_driver);

MODULE_DESCRIPTION("AM53C974 SCSI driver");
MODULE_AUTHOR("Hannes Reinecke <hare@suse.de>");
MODULE_LICENSE("GPL");
MODULE_VERSION(DRV_MODULE_VERSION);
MODULE_ALIAS("tmscsim");

module_param(am53c974_debug, bool, 0644);
MODULE_PARM_DESC(am53c974_debug, "Enable debugging");

module_param(am53c974_fenab, bool, 0444);
MODULE_PARM_DESC(am53c974_fenab, "Enable 24-bit DMA transfer sizes");

Annotation

• Immediate include surface: `linux/kernel.h`, `linux/module.h`, `linux/init.h`, `linux/delay.h`, `linux/pci.h`, `linux/interrupt.h`, `scsi/scsi_host.h`, `esp_scsi.h`.
• Detected declarations: `struct pci_esp_priv`, `function pci_esp_write8`, `function pci_esp_read8`, `function pci_esp_write32`, `function pci_esp_irq_pending`, `function pci_esp_reset_dma`, `function pci_esp_dma_invalidate`, `function pci_esp_dma_error`, `function pci_esp_send_dma_cmd`, `function pci_esp_dma_length_limit`.
• Atlas domain: Driver Families / drivers/scsi.
• Implementation status: pattern 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.