drivers/dma/ti/k3-udma-glue.c

File Facts

System

Linux kernel

Corpus path

drivers/dma/ti/k3-udma-glue.c

Extension

.c

Size

43962 bytes

Lines

1586

Domain

Driver Families

Bucket

drivers/dma

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.
• 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/module.h
• linux/atomic.h
• linux/delay.h
• linux/dma-mapping.h
• linux/io.h
• linux/init.h
• linux/of.h
• linux/platform_device.h
• linux/soc/ti/k3-ringacc.h
• linux/dma/ti-cppi5.h
• linux/dma/k3-udma-glue.h
• k3-udma.h
• k3-psil-priv.h

Detected Declarations

• struct k3_udma_glue_common
• struct k3_udma_glue_tx_channel
• struct k3_udma_glue_rx_flow
• struct k3_udma_glue_rx_channel
• function k3_udma_chan_dev_release
• function of_k3_udma_glue_parse
• function of_k3_udma_glue_parse_chn_common
• function of_k3_udma_glue_parse_chn
• function of_k3_udma_glue_parse_chn_by_id
• function k3_udma_glue_dump_tx_chn
• function k3_udma_glue_dump_tx_rt_chn
• function k3_udma_glue_cfg_tx_chn
• function k3_udma_glue_request_tx_chn_common
• function k3_udma_glue_request_tx_chn
• function k3_udma_glue_request_tx_chn_for_thread_id
• function k3_udma_glue_release_tx_chn
• function k3_udma_glue_push_tx_chn
• function k3_udma_glue_pop_tx_chn
• function k3_udma_glue_enable_tx_chn
• function k3_udma_glue_disable_tx_chn
• function k3_udma_glue_tdown_tx_chn
• function k3_udma_glue_reset_tx_chn
• function k3_udma_glue_tx_get_hdesc_size
• function k3_udma_glue_tx_get_txcq_id
• function k3_udma_glue_tx_get_irq
• function k3_udma_glue_tx_get_dma_device
• function k3_udma_glue_tx_dma_to_cppi5_addr
• function k3_udma_glue_tx_cppi5_to_dma_addr
• function k3_udma_glue_cfg_rx_chn
• function k3_udma_glue_release_rx_flow
• function k3_udma_glue_cfg_rx_flow
• function k3_udma_glue_dump_rx_chn
• function k3_udma_glue_dump_rx_rt_chn
• function k3_udma_glue_allocate_rx_flows
• function k3_udma_glue_request_rx_chn_priv
• function k3_udma_glue_request_remote_rx_chn_common
• function k3_udma_glue_request_remote_rx_chn
• function k3_udma_glue_request_remote_rx_chn_for_thread_id
• function k3_udma_glue_request_rx_chn
• function k3_udma_glue_release_rx_chn
• function k3_udma_glue_rx_flow_init
• function k3_udma_glue_rx_flow_get_fdq_id
• function k3_udma_glue_rx_get_flow_id_base
• function k3_udma_glue_rx_flow_enable
• function k3_udma_glue_rx_flow_disable
• function k3_udma_glue_enable_rx_chn
• function k3_udma_glue_disable_rx_chn
• function k3_udma_glue_tdown_rx_chn

Annotated Snippet

module_init(k3_udma_glue_class_init);
MODULE_DESCRIPTION("TI K3 NAVSS DMA glue interface");
MODULE_LICENSE("GPL v2");

Annotation

• Immediate include surface: `linux/module.h`, `linux/atomic.h`, `linux/delay.h`, `linux/dma-mapping.h`, `linux/io.h`, `linux/init.h`, `linux/of.h`, `linux/platform_device.h`.
• Detected declarations: `struct k3_udma_glue_common`, `struct k3_udma_glue_tx_channel`, `struct k3_udma_glue_rx_flow`, `struct k3_udma_glue_rx_channel`, `function k3_udma_chan_dev_release`, `function of_k3_udma_glue_parse`, `function of_k3_udma_glue_parse_chn_common`, `function of_k3_udma_glue_parse_chn`, `function of_k3_udma_glue_parse_chn_by_id`, `function k3_udma_glue_dump_tx_chn`.
• Atlas domain: Driver Families / drivers/dma.
• Implementation status: integration 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.