drivers/crypto/nx/nx-common-pseries.c

File Facts

System

Linux kernel

Corpus path

drivers/crypto/nx/nx-common-pseries.c

Extension

.c

Size

35982 bytes

Lines

1272

Domain

Driver Families

Bucket

drivers/crypto

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.
• 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

• asm/vio.h
• asm/hvcall.h
• asm/vas.h
• crypto/internal/scompress.h
• nx-842.h
• nx_csbcpb.h

Detected Declarations

• struct hv_nx_cop_caps
• struct nx_cop_caps
• struct nx842_workmem
• struct ibm_nx842_counters
• struct nx842_devdata
• struct nx842_slentry
• struct nx842_scatterlist
• function check_constraints
• function ibm_nx842_incr_hist
• function nx842_get_desired_dma
• function nx842_get_scatterlist_size
• function nx842_build_scatterlist
• function nx842_validate_result
• function nx842_pseries_compress
• function nx842_pseries_decompress
• function nx842_OF_set_defaults
• function nx842_OF_upd_status
• function nx842_OF_upd_maxsglen
• function nx842_OF_upd_maxsyncop
• function nx842_OF_upd
• function notifier_to_errno
• function nx842_timehist_show
• function nx842_probe
• function nx842_remove
• function nxcop_get_capabilities
• function nx842_pseries_init
• function nx842_pseries_exit
• module init nx842_pseries_init

Annotated Snippet

module_init(nx842_pseries_init);

static void __exit nx842_pseries_exit(void)
{
	struct nx842_devdata *old_devdata;
	unsigned long flags;

	vas_unregister_api_pseries();

	crypto_unregister_scomp(&nx842_pseries_alg);

	spin_lock_irqsave(&devdata_spinlock, flags);
	old_devdata = rcu_dereference_check(devdata,
			lockdep_is_held(&devdata_spinlock));
	RCU_INIT_POINTER(devdata, NULL);
	spin_unlock_irqrestore(&devdata_spinlock, flags);
	synchronize_rcu();
	if (old_devdata && old_devdata->dev)
		dev_set_drvdata(old_devdata->dev, NULL);
	kfree(old_devdata);
	vio_unregister_driver(&nx842_vio_driver);
}

module_exit(nx842_pseries_exit);

Annotation

• Immediate include surface: `asm/vio.h`, `asm/hvcall.h`, `asm/vas.h`, `crypto/internal/scompress.h`, `nx-842.h`, `nx_csbcpb.h`.
• Detected declarations: `struct hv_nx_cop_caps`, `struct nx_cop_caps`, `struct nx842_workmem`, `struct ibm_nx842_counters`, `struct nx842_devdata`, `struct nx842_slentry`, `struct nx842_scatterlist`, `function check_constraints`, `function ibm_nx842_incr_hist`, `function nx842_get_desired_dma`.
• Atlas domain: Driver Families / drivers/crypto.
• Implementation status: integration implementation candidate.
• Synchronization appears in or near this file; preserve lock ordering, sleepability, and interrupt-context constraints.

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.