drivers/slimbus/qcom-ngd-ctrl.c

File Facts

System

Linux kernel

Corpus path

drivers/slimbus/qcom-ngd-ctrl.c

Extension

.c

Size

44584 bytes

Lines

1790

Domain

Driver Families

Bucket

drivers/slimbus

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/irq.h
• linux/kernel.h
• linux/init.h
• linux/slab.h
• linux/interrupt.h
• linux/platform_device.h
• linux/dma-mapping.h
• linux/dmaengine.h
• linux/slimbus.h
• linux/delay.h
• linux/pm_runtime.h
• linux/mutex.h
• linux/notifier.h
• linux/remoteproc/qcom_rproc.h
• linux/of.h
• linux/io.h
• linux/soc/qcom/qmi.h
• linux/soc/qcom/pdr.h
• net/sock.h
• slimbus.h

Detected Declarations

• struct ngd_reg_offset_data
• struct qcom_slim_ngd_qmi
• struct qcom_slim_ngd_ctrl
• struct qcom_slim_ngd
• struct qcom_slim_ngd_dma_desc
• struct qcom_slim_ngd
• struct qcom_slim_ngd_ctrl
• struct slimbus_select_inst_req_msg_v01
• struct slimbus_select_inst_resp_msg_v01
• struct slimbus_power_req_msg_v01
• struct slimbus_power_resp_msg_v01
• enum qcom_slim_ngd_state
• enum slimbus_mode_enum_type_v01
• enum slimbus_pm_enum_type_v01
• enum slimbus_resp_enum_type_v01
• function qcom_slim_qmi_send_select_inst_req
• function qcom_slim_qmi_power_resp_cb
• function qcom_slim_qmi_send_power_request
• function qcom_slim_qmi_init
• function qcom_slim_qmi_exit
• function qcom_slim_qmi_power_request
• function qcom_slim_ngd_tx_msg_dma_cb
• function qcom_slim_ngd_tx_msg_post
• function qcom_slim_ngd_rx
• function qcom_slim_ngd_rx_msgq_cb
• function qcom_slim_ngd_post_rx_msgq
• function qcom_slim_ngd_init_rx_msgq
• function qcom_slim_ngd_init_tx_msgq
• function qcom_slim_ngd_init_dma
• function qcom_slim_ngd_interrupt
• function qcom_slim_ngd_xfer_msg
• function qcom_slim_ngd_xfer_msg_sync
• function qcom_slim_calc_coef
• function value
• function qcom_slim_ngd_enable_stream
• function qcom_slim_ngd_get_laddr
• function qcom_slim_ngd_exit_dma
• function qcom_slim_ngd_setup
• function qcom_slim_ngd_power_up
• function qcom_slim_ngd_notify_slaves
• function for_each_child_of_node
• function qcom_slim_ngd_master_worker
• function qcom_slim_ngd_update_device_status
• function qcom_slim_ngd_runtime_resume
• function qcom_slim_ngd_enable
• function qcom_slim_ngd_qmi_new_server
• function qcom_slim_ngd_qmi_del_server
• function qcom_slim_ngd_qmi_svc_event_init

Annotated Snippet

module_init(qcom_slim_ngd_init);
module_exit(qcom_slim_ngd_exit);
MODULE_LICENSE("GPL v2");
MODULE_DESCRIPTION("Qualcomm SLIMBus NGD controller");

Annotation

• Immediate include surface: `linux/irq.h`, `linux/kernel.h`, `linux/init.h`, `linux/slab.h`, `linux/interrupt.h`, `linux/platform_device.h`, `linux/dma-mapping.h`, `linux/dmaengine.h`.
• Detected declarations: `struct ngd_reg_offset_data`, `struct qcom_slim_ngd_qmi`, `struct qcom_slim_ngd_ctrl`, `struct qcom_slim_ngd`, `struct qcom_slim_ngd_dma_desc`, `struct qcom_slim_ngd`, `struct qcom_slim_ngd_ctrl`, `struct slimbus_select_inst_req_msg_v01`, `struct slimbus_select_inst_resp_msg_v01`, `struct slimbus_power_req_msg_v01`.
• Atlas domain: Driver Families / drivers/slimbus.
• 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.