drivers/tty/serial/sunhv.c

File Facts

System

Linux kernel

Corpus path

drivers/tty/serial/sunhv.c

Extension

.c

Size

13638 bytes

Lines

654

Domain

Driver Families

Bucket

drivers/tty

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.
• 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/errno.h
• linux/tty.h
• linux/tty_flip.h
• linux/major.h
• linux/circ_buf.h
• linux/serial.h
• linux/sysrq.h
• linux/console.h
• linux/spinlock.h
• linux/slab.h
• linux/delay.h
• linux/init.h
• linux/of.h
• linux/platform_device.h
• asm/hypervisor.h
• asm/spitfire.h
• asm/irq.h
• asm/setup.h
• linux/serial_core.h
• linux/sunserialcore.h

Detected Declarations

• struct sunhv_ops
• function transmit_chars_putchar
• function transmit_chars_write
• function receive_chars_getchar
• function receive_chars_read
• function transmit_chars
• function sunhv_interrupt
• function sunhv_tx_empty
• function sunhv_set_mctrl
• function sunhv_get_mctrl
• function sunhv_stop_tx
• function sunhv_start_tx
• function sunhv_send_xchar
• function sunhv_stop_rx
• function sunhv_startup
• function sunhv_shutdown
• function sunhv_release_port
• function sunhv_config_port
• function sunhv_migrate_hvcons_irq
• function fill_con_write_page
• function sunhv_console_write_paged
• function sunhv_console_putchar
• function sunhv_console_write_bychar
• function hv_probe
• function hv_remove
• function sunhv_init
• module init sunhv_init

Annotated Snippet

device_initcall(sunhv_init);

#if 0 /* ...def MODULE ; never supported as such */
MODULE_AUTHOR("David S. Miller");
MODULE_DESCRIPTION("SUN4V Hypervisor console driver");
MODULE_VERSION("2.0");
MODULE_LICENSE("GPL");
#endif

Annotation

• Immediate include surface: `linux/kernel.h`, `linux/errno.h`, `linux/tty.h`, `linux/tty_flip.h`, `linux/major.h`, `linux/circ_buf.h`, `linux/serial.h`, `linux/sysrq.h`.
• Detected declarations: `struct sunhv_ops`, `function transmit_chars_putchar`, `function transmit_chars_write`, `function receive_chars_getchar`, `function receive_chars_read`, `function transmit_chars`, `function sunhv_interrupt`, `function sunhv_tx_empty`, `function sunhv_set_mctrl`, `function sunhv_get_mctrl`.
• Atlas domain: Driver Families / drivers/tty.
• Implementation status: integration 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.