drivers/iommu/arm/arm-smmu/arm-smmu.c

File Facts

System

Linux kernel

Corpus path

drivers/iommu/arm/arm-smmu/arm-smmu.c

Extension

.c

Size

67881 bytes

Lines

2396

Domain

Driver Families

Bucket

drivers/iommu

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/acpi.h
• linux/acpi_iort.h
• linux/bitfield.h
• linux/delay.h
• linux/dma-mapping.h
• linux/err.h
• linux/interrupt.h
• linux/io.h
• linux/iopoll.h
• linux/module.h
• linux/of.h
• linux/of_address.h
• linux/pci.h
• linux/platform_device.h
• linux/pm_runtime.h
• linux/ratelimit.h
• linux/slab.h
• linux/string_choices.h
• linux/fsl/mc.h
• arm-smmu.h
• ../../dma-iommu.h

Detected Declarations

• struct arm_smmu_match_data
• function arm_smmu_rpm_get
• function arm_smmu_rpm_put
• function arm_smmu_rpm_use_autosuspend
• function __arm_smmu_get_pci_sid
• function __find_legacy_master_phandle
• function of_for_each_phandle
• function arm_smmu_register_legacy_master
• function arm_smmu_register_legacy_master
• function __arm_smmu_free_bitmap
• function __arm_smmu_tlb_sync
• function arm_smmu_tlb_sync_global
• function arm_smmu_tlb_sync_context
• function arm_smmu_tlb_inv_context_s1
• function arm_smmu_tlb_inv_context_s2
• function arm_smmu_tlb_inv_range_s1
• function arm_smmu_tlb_inv_range_s2
• function arm_smmu_tlb_inv_walk_s1
• function arm_smmu_tlb_add_page_s1
• function arm_smmu_tlb_inv_walk_s2
• function arm_smmu_tlb_add_page_s2
• function arm_smmu_tlb_inv_walk_s2_v1
• function arm_smmu_tlb_add_page_s2_v1
• function arm_smmu_read_context_fault_info
• function arm_smmu_print_context_fault_info
• function arm_smmu_context_fault
• function arm_smmu_global_fault
• function arm_smmu_init_context_bank
• function arm_smmu_write_context_bank
• function arm_smmu_alloc_context_bank
• function arm_smmu_init_domain_context
• function arm_smmu_destroy_domain_context
• function arm_smmu_domain_free
• function arm_smmu_write_smr
• function arm_smmu_write_s2cr
• function arm_smmu_write_sme
• function arm_smmu_test_smr_masks
• function arm_smmu_find_sme
• function arm_smmu_free_sme
• function arm_smmu_master_alloc_smes
• function arm_smmu_master_free_smes
• function arm_smmu_master_install_s2crs
• function for_each_cfg_sme
• function arm_smmu_attach_dev
• function arm_smmu_attach_dev_type
• function arm_smmu_attach_dev_identity
• function arm_smmu_attach_dev_blocked
• function arm_smmu_map_pages

Annotated Snippet

module_init(arm_smmu_init);

static void __exit arm_smmu_exit(void)
{
	arm_smmu_impl_module_exit();
	platform_driver_unregister(&arm_smmu_driver);
}
module_exit(arm_smmu_exit);

MODULE_DESCRIPTION("IOMMU API for ARM architected SMMU implementations");
MODULE_AUTHOR("Will Deacon <will@kernel.org>");
MODULE_ALIAS("platform:arm-smmu");
MODULE_LICENSE("GPL v2");

Annotation

• Immediate include surface: `linux/acpi.h`, `linux/acpi_iort.h`, `linux/bitfield.h`, `linux/delay.h`, `linux/dma-mapping.h`, `linux/err.h`, `linux/interrupt.h`, `linux/io.h`.
• Detected declarations: `struct arm_smmu_match_data`, `function arm_smmu_rpm_get`, `function arm_smmu_rpm_put`, `function arm_smmu_rpm_use_autosuspend`, `function __arm_smmu_get_pci_sid`, `function __find_legacy_master_phandle`, `function of_for_each_phandle`, `function arm_smmu_register_legacy_master`, `function arm_smmu_register_legacy_master`, `function __arm_smmu_free_bitmap`.
• Atlas domain: Driver Families / drivers/iommu.
• 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.