drivers/net/ethernet/broadcom/bnxt/bnxt_ptp.h

Source file repositories/reference/linux-study-clean/drivers/net/ethernet/broadcom/bnxt/bnxt_ptp.h

File Facts

System
Linux kernel
Corpus path
drivers/net/ethernet/broadcom/bnxt/bnxt_ptp.h
Extension
.h
Size
6008 bytes
Lines
202
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.

Dependency Surface

Detected Declarations

Annotated Snippet

struct pps_pin {
	u8 event;
	u8 usage;
	u8 state;
};

#define TSIO_PIN_VALID(pin) ((pin) >= 0 && (pin) < (BNXT_MAX_TSIO_PINS))

#define EVENT_DATA2_PPS_EVENT_TYPE(data2)				\
	((data2) & ASYNC_EVENT_CMPL_PPS_TIMESTAMP_EVENT_DATA2_EVENT_TYPE)

#define EVENT_DATA2_PPS_PIN_NUM(data2)					\
	(((data2) &							\
	  ASYNC_EVENT_CMPL_PPS_TIMESTAMP_EVENT_DATA2_PIN_NUMBER_MASK) >>\
	 ASYNC_EVENT_CMPL_PPS_TIMESTAMP_EVENT_DATA2_PIN_NUMBER_SFT)

#define BNXT_DATA2_UPPER_MSK						\
	ASYNC_EVENT_CMPL_PPS_TIMESTAMP_EVENT_DATA2_PPS_TIMESTAMP_UPPER_MASK

#define BNXT_DATA2_UPPER_SFT						\
	(32 -								\
	 ASYNC_EVENT_CMPL_PPS_TIMESTAMP_EVENT_DATA2_PPS_TIMESTAMP_UPPER_SFT)

#define BNXT_DATA1_LOWER_MSK						\
	ASYNC_EVENT_CMPL_PPS_TIMESTAMP_EVENT_DATA1_PPS_TIMESTAMP_LOWER_MASK

#define BNXT_DATA1_LOWER_SFT						\
	  ASYNC_EVENT_CMPL_PPS_TIMESTAMP_EVENT_DATA1_PPS_TIMESTAMP_LOWER_SFT

#define EVENT_PPS_TS(data2, data1)					\
	(((u64)((data2) & BNXT_DATA2_UPPER_MSK) << BNXT_DATA2_UPPER_SFT) |\
	 (((data1) & BNXT_DATA1_LOWER_MSK) >> BNXT_DATA1_LOWER_SFT))

#define BNXT_PPS_PIN_DISABLE	0
#define BNXT_PPS_PIN_ENABLE	1
#define BNXT_PPS_PIN_NONE	0
#define BNXT_PPS_PIN_PPS_IN	1
#define BNXT_PPS_PIN_PPS_OUT	2
#define BNXT_PPS_PIN_SYNC_IN	3
#define BNXT_PPS_PIN_SYNC_OUT	4

#define BNXT_PPS_EVENT_INTERNAL	1
#define BNXT_PPS_EVENT_EXTERNAL	2

struct bnxt_pps {
	u8 num_pins;
#define BNXT_MAX_TSIO_PINS	4
	struct pps_pin pins[BNXT_MAX_TSIO_PINS];
};

struct bnxt_ptp_stats {
	u64		ts_pkts;
	u64		ts_lost;
	atomic64_t	ts_err;
};

#define BNXT_MAX_TX_TS		4
#define NEXT_TXTS(idx)		(((idx) + 1) & (BNXT_MAX_TX_TS - 1))

struct bnxt_ptp_tx_req {
	struct sk_buff		*tx_skb;
	u16			tx_seqid;
	u16			tx_hdr_off;
	unsigned long		abs_txts_tmo;
};

struct bnxt_ptp_cfg {
	struct ptp_clock_info	ptp_info;
	struct ptp_clock	*ptp_clock;
	struct cyclecounter	cc;
	struct timecounter	tc;
	struct bnxt_pps		pps_info;
	/* serialize timecounter access */
	seqlock_t		ptp_lock;
	/* serialize ts tx request queuing */
	spinlock_t		ptp_tx_lock;
	u64			current_time;
	unsigned long		next_period;
	unsigned long		next_overflow_check;
	u32			cmult;
	/* cache of upper 24 bits of cyclecoutner. 8 bits are used to check for roll-over */
	u32			old_time;
	/* a 23b shift cyclecounter will overflow in ~36 mins.  Check overflow every 18 mins. */
	#define BNXT_PHC_OVERFLOW_PERIOD	(18 * 60 * HZ)

	struct bnxt_ptp_tx_req	txts_req[BNXT_MAX_TX_TS];

	struct bnxt		*bp;
	u32			tx_avail;
	u16			rxctl;

Annotation

Implementation Notes