drivers/s390/cio/qdio_main.c

File Facts

System

Linux kernel

Corpus path

drivers/s390/cio/qdio_main.c

Extension

.c

Size

35556 bytes

Lines

1431

Domain

Driver Families

Bucket

drivers/s390

Inferred role

Driver Families: exported/initcall integration point

Status

integration 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.
• Exports symbols or registers init work; inspect boot/module ordering and who consumes the exported contract.
• Uses kernel synchronization; read lock ordering, sleepability, and interrupt context assumptions before translating.
• 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/export.h
• linux/module.h
• linux/init.h
• linux/kernel.h
• linux/kmemleak.h
• linux/delay.h
• linux/gfp.h
• linux/io.h
• linux/atomic.h
• asm/debug.h
• asm/qdio.h
• asm/asm.h
• asm/ipl.h
• cio.h
• css.h
• device.h
• qdio.h
• qdio_debug.h

Detected Declarations

• function do_siga_sync
• function do_siga_input
• function do_siga_output
• function qdio_do_eqbs
• function qdio_do_sqbs
• function get_buf_states
• function get_buf_state
• function set_buf_states
• function set_buf_state
• function qdio_init_buf_states
• function qdio_siga_sync
• function qdio_sync_input_queue
• function qdio_sync_output_queue
• function qdio_siga_sync_q
• function qdio_siga_output
• function qdio_siga_input
• function debug_get_buf_state
• function qdio_stop_polling
• function account_sbals
• function process_buffer_error
• function inbound_handle_work
• function get_inbound_buffer_frontier
• function qdio_inspect_input_queue
• function qdio_inbound_q_done
• function get_outbound_buffer_frontier
• function qdio_inspect_output_queue
• function qdio_kick_outbound_q
• function qdio_set_state
• function qdio_irq_check_sense
• function qdio_int_handler_pci
• function qdio_handle_activate_check
• function qdio_establish_handle_irq
• function qdio_int_handler
• function qdio_get_ssqd_desc
• function qdio_cancel_ccw
• function qdio_shutdown
• function qdio_free
• function qdio_allocate
• function qdio_trace_init_data
• function qdio_establish
• function qdio_activate
• function handle_inbound
• function qdio_add_bufs_to_input_queue
• function handle_outbound
• function get_buf_state
• function qdio_add_bufs_to_output_queue
• function qdio_start_irq
• function for_each_input_queue

Annotated Snippet

module_init(init_QDIO);
module_exit(exit_QDIO);

Annotation

• Immediate include surface: `linux/export.h`, `linux/module.h`, `linux/init.h`, `linux/kernel.h`, `linux/kmemleak.h`, `linux/delay.h`, `linux/gfp.h`, `linux/io.h`.
• Detected declarations: `function do_siga_sync`, `function do_siga_input`, `function do_siga_output`, `function qdio_do_eqbs`, `function qdio_do_sqbs`, `function get_buf_states`, `function get_buf_state`, `function set_buf_states`, `function set_buf_state`, `function qdio_init_buf_states`.
• Atlas domain: Driver Families / drivers/s390.
• Implementation status: integration implementation candidate.
• 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.