drivers/net/wireless/broadcom/brcm80211/brcmfmac/commonring.h

File Facts

System

Linux kernel

Corpus path

drivers/net/wireless/broadcom/brcm80211/brcmfmac/commonring.h

Extension

.h

Size

1877 bytes

Lines

63

Domain

Driver Families

Bucket

drivers/net

Inferred role

Driver Families: implementation source

Status

source 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.
• Uses kernel synchronization; read lock ordering, sleepability, and interrupt context assumptions before translating.
• Defines or uses C structs; map object ownership, embedded links, reference counts, and lock ownership.

Dependency Surface

• No C-style include directives detected by the generator.

Detected Declarations

• struct brcmf_commonring

Annotated Snippet

struct brcmf_commonring {
	u16 r_ptr;
	u16 w_ptr;
	u16 f_ptr;
	u16 depth;
	u16 item_len;

	void *buf_addr;

	int (*cr_ring_bell)(void *ctx);
	int (*cr_update_rptr)(void *ctx);
	int (*cr_update_wptr)(void *ctx);
	int (*cr_write_rptr)(void *ctx);
	int (*cr_write_wptr)(void *ctx);

	void *cr_ctx;

	spinlock_t lock;
	unsigned long flags;
	bool inited;
	bool was_full;

	atomic_t outstanding_tx;
};


void brcmf_commonring_register_cb(struct brcmf_commonring *commonring,
				  int (*cr_ring_bell)(void *ctx),
				  int (*cr_update_rptr)(void *ctx),
				  int (*cr_update_wptr)(void *ctx),
				  int (*cr_write_rptr)(void *ctx),
				  int (*cr_write_wptr)(void *ctx), void *ctx);
void brcmf_commonring_config(struct brcmf_commonring *commonring, u16 depth,
			     u16 item_len, void *buf_addr);
void brcmf_commonring_lock(struct brcmf_commonring *commonring);
void brcmf_commonring_unlock(struct brcmf_commonring *commonring);
bool brcmf_commonring_write_available(struct brcmf_commonring *commonring);
void *brcmf_commonring_reserve_for_write(struct brcmf_commonring *commonring);
void *
brcmf_commonring_reserve_for_write_multiple(struct brcmf_commonring *commonring,
					    u16 n_items, u16 *alloced);
int brcmf_commonring_write_complete(struct brcmf_commonring *commonring);
void brcmf_commonring_write_cancel(struct brcmf_commonring *commonring,
				   u16 n_items);
void *brcmf_commonring_get_read_ptr(struct brcmf_commonring *commonring,
				    u16 *n_items);
int brcmf_commonring_read_complete(struct brcmf_commonring *commonring,
				   u16 n_items);

#define brcmf_commonring_n_items(commonring) (commonring->depth)
#define brcmf_commonring_len_item(commonring) (commonring->item_len)


#endif /* BRCMFMAC_COMMONRING_H */

Annotation

• Detected declarations: `struct brcmf_commonring`.
• Atlas domain: Driver Families / drivers/net.
• Implementation status: source 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.