drivers/firmware/qcom/qcom_scm.c

File Facts

System

Linux kernel

Corpus path

drivers/firmware/qcom/qcom_scm.c

Extension

.c

Size

78685 bytes

Lines

2913

Domain

Driver Families

Bucket

drivers/firmware

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/arm-smccc.h
• linux/bitfield.h
• linux/bits.h
• linux/cleanup.h
• linux/clk.h
• linux/completion.h
• linux/cpumask.h
• linux/dma-mapping.h
• linux/err.h
• linux/export.h
• linux/firmware/qcom/qcom_scm.h
• linux/firmware/qcom/qcom_tzmem.h
• linux/init.h
• linux/interconnect.h
• linux/interrupt.h
• linux/kstrtox.h
• linux/module.h
• linux/of.h
• linux/of_address.h
• linux/of_irq.h
• linux/of_platform.h
• linux/of_reserved_mem.h
• linux/platform_device.h
• linux/reset-controller.h
• linux/remoteproc.h
• linux/sizes.h
• linux/types.h
• dt-bindings/interrupt-controller/arm-gic.h
• qcom_scm.h
• qcom_tzmem.h

Detected Declarations

• struct qcom_scm
• struct qcom_scm_current_perm_info
• struct qcom_scm_mem_map_info
• struct qcom_scm_qseecom_resp
• enum qcom_scm_qseecom_result
• enum qcom_scm_qseecom_resp_type
• enum qcom_scm_qseecom_tz_owner
• enum qcom_scm_qseecom_tz_svc
• enum qcom_scm_qseecom_tz_cmd_app
• enum qcom_scm_qseecom_tz_cmd_info
• function qcom_scm_clk_enable
• function qcom_scm_clk_disable
• function qcom_scm_bw_enable
• function qcom_scm_bw_disable
• function __get_convention
• function qcom_scm_call
• function qcom_scm_call_atomic
• function __qcom_scm_is_call_available
• function qcom_scm_set_boot_addr
• function for_each_present_cpu
• function qcom_scm_set_boot_addr_mc
• function qcom_scm_set_warm_boot_addr
• function qcom_scm_set_cold_boot_addr
• function qcom_scm_cpu_power_down
• function qcom_scm_set_remote_state
• function qcom_scm_disable_sdi
• function __qcom_scm_set_dload_mode
• function qcom_scm_io_rmw
• function qcom_scm_set_download_mode
• function devm_qcom_scm_pas_context_alloc
• function __qcom_scm_pas_init_image
• function qcom_scm_pas_prep_and_init_image
• function qcom_scm_pas_init_image
• function qcom_scm_pas_metadata_release
• function qcom_scm_pas_mem_setup
• function qcom_scm_pas_get_rsc_table
• function qcom_scm_pas_auth_and_reset
• function qcom_scm_pas_prepare_and_auth_reset
• function qcom_scm_pas_shutdown
• function qcom_scm_pas_supported
• function __qcom_scm_pas_mss_reset
• function qcom_scm_pas_reset_assert
• function qcom_scm_pas_reset_deassert
• function qcom_scm_io_readl
• function qcom_scm_io_writel
• function qcom_scm_restore_sec_cfg_available
• function qcom_scm_restore_sec_cfg
• function qcom_scm_set_gpu_smmu_aperture_is_available

Annotated Snippet

subsys_initcall(qcom_scm_init);

MODULE_DESCRIPTION("Qualcomm Technologies, Inc. SCM driver");
MODULE_LICENSE("GPL v2");

Annotation

• Immediate include surface: `linux/arm-smccc.h`, `linux/bitfield.h`, `linux/bits.h`, `linux/cleanup.h`, `linux/clk.h`, `linux/completion.h`, `linux/cpumask.h`, `linux/dma-mapping.h`.
• Detected declarations: `struct qcom_scm`, `struct qcom_scm_current_perm_info`, `struct qcom_scm_mem_map_info`, `struct qcom_scm_qseecom_resp`, `enum qcom_scm_qseecom_result`, `enum qcom_scm_qseecom_resp_type`, `enum qcom_scm_qseecom_tz_owner`, `enum qcom_scm_qseecom_tz_svc`, `enum qcom_scm_qseecom_tz_cmd_app`, `enum qcom_scm_qseecom_tz_cmd_info`.
• Atlas domain: Driver Families / drivers/firmware.
• 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.