drivers/infiniband/hw/hfi1/qsfp.h

File Facts

System

Linux kernel

Corpus path

drivers/infiniband/hw/hfi1/qsfp.h

Extension

.h

Size

7223 bytes

Lines

203

Domain

Driver Families

Bucket

drivers/infiniband

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.
• 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 qsfp_data
• struct hfi1_asic_data

Annotated Snippet

struct qsfp_data {
	/* Helps to find our way */
	struct hfi1_pportdata *ppd;
	struct work_struct qsfp_work;
	u8 cache[QSFP_MAX_NUM_PAGES * 128];
	/* protect qsfp data */
	spinlock_t qsfp_lock;
	u8 check_interrupt_flags;
	u8 reset_needed;
	u8 limiting_active;
	u8 cache_valid;
	u8 cache_refresh_required;
};

int refresh_qsfp_cache(struct hfi1_pportdata *ppd,
		       struct qsfp_data *cp);
int get_qsfp_power_class(u8 power_byte);
int qsfp_mod_present(struct hfi1_pportdata *ppd);
int get_cable_info(struct hfi1_devdata *dd, u32 port_num, u32 addr,
		   u32 len, u8 *data);

int i2c_write(struct hfi1_pportdata *ppd, u32 target, int i2c_addr,
	      int offset, void *bp, int len);
int i2c_read(struct hfi1_pportdata *ppd, u32 target, int i2c_addr,
	     int offset, void *bp, int len);
int qsfp_write(struct hfi1_pportdata *ppd, u32 target, int addr, void *bp,
	       int len);
int qsfp_read(struct hfi1_pportdata *ppd, u32 target, int addr, void *bp,
	      int len);
int one_qsfp_read(struct hfi1_pportdata *ppd, u32 target, int addr, void *bp,
		  int len);
struct hfi1_asic_data;
int set_up_i2c(struct hfi1_devdata *dd, struct hfi1_asic_data *ad);
void clean_up_i2c(struct hfi1_devdata *dd, struct hfi1_asic_data *ad);

Annotation

• Detected declarations: `struct qsfp_data`, `struct hfi1_asic_data`.
• Atlas domain: Driver Families / drivers/infiniband.
• Implementation status: source implementation candidate.

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.