drivers/rapidio/devices/tsi721.c

File Facts

System

Linux kernel

Corpus path

drivers/rapidio/devices/tsi721.c

Extension

.c

Size

83666 bytes

Lines

3039

Domain

Driver Families

Bucket

drivers/rapidio

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/io.h
• linux/errno.h
• linux/init.h
• linux/ioport.h
• linux/kernel.h
• linux/module.h
• linux/pci.h
• linux/rio.h
• linux/rio_drv.h
• linux/dma-mapping.h
• linux/interrupt.h
• linux/kfifo.h
• linux/delay.h
• tsi721.h

Detected Declarations

• function tsi721_lcread
• function tsi721_lcwrite
• function transaction
• function tsi721_cread_dma
• function tsi721_cwrite_dma
• function tsi721_pw_handler
• function tsi721_pw_dpc
• function tsi721_pw_enable
• function tsi721_dsend
• function tsi721_dbell_handler
• function tsi721_db_dpc
• function list_for_each_entry
• function tsi721_irqhandler
• function tsi721_interrupts_init
• function tsi721_omsg_msix
• function tsi721_imsg_msix
• function tsi721_srio_msix
• function tsi721_sr2pc_ch_msix
• function tsi721_request_msix
• function tsi721_enable_msix
• function tsi721_request_irq
• function tsi721_free_irq
• function tsi721_obw_alloc
• function tsi721_map_outb_win
• function tsi721_unmap_outb_win
• function tsi721_init_pc2sr_mapping
• function tsi721_rio_map_inb_mem
• function tsi721_rio_unmap_inb_mem
• function list_for_each_entry
• function tsi721_init_sr2pc_mapping
• function tsi721_close_sr2pc_mapping
• function tsi721_port_write_init
• function tsi721_port_write_free
• function tsi721_doorbell_init
• function tsi721_doorbell_free
• function tsi721_bdma_maint_init
• function tsi721_bdma_maint_free
• function tsi721_imsg_interrupt_enable
• function tsi721_imsg_interrupt_disable
• function tsi721_omsg_interrupt_enable
• function tsi721_omsg_interrupt_disable
• function tsi721_add_outb_message
• function tsi721_omsg_handler
• function Descriptor
• function tsi721_open_outb_mbox
• function tsi721_close_outb_mbox
• function tsi721_imsg_handler
• function tsi721_open_inb_mbox

Annotated Snippet

static struct pci_driver tsi721_driver = {
	.name		= "tsi721",
	.id_table	= tsi721_pci_tbl,
	.probe		= tsi721_probe,
	.remove		= tsi721_remove,
	.shutdown	= tsi721_shutdown,
};

module_pci_driver(tsi721_driver);

MODULE_DESCRIPTION("IDT Tsi721 PCIExpress-to-SRIO bridge driver");
MODULE_AUTHOR("Integrated Device Technology, Inc.");
MODULE_LICENSE("GPL");

Annotation

• Immediate include surface: `linux/io.h`, `linux/errno.h`, `linux/init.h`, `linux/ioport.h`, `linux/kernel.h`, `linux/module.h`, `linux/pci.h`, `linux/rio.h`.
• Detected declarations: `function tsi721_lcread`, `function tsi721_lcwrite`, `function transaction`, `function tsi721_cread_dma`, `function tsi721_cwrite_dma`, `function tsi721_pw_handler`, `function tsi721_pw_dpc`, `function tsi721_pw_enable`, `function tsi721_dsend`, `function tsi721_dbell_handler`.
• Atlas domain: Driver Families / drivers/rapidio.
• 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.