60 static u32 cube_rtt_scale __read_mostly;
61 static u32 beta_scale __read_mostly;
87 	u32	cnt;		/* increase cwnd by 1 after ACKs */
88 	u32	last_max_cwnd;	/* last maximum snd_cwnd */
89 	u32	last_cwnd;	/* the last snd_cwnd */
90 	u32	last_time;	/* time when updated last_cwnd */
91 	u32	bic_origin_point;/* origin point of bic function */
92 	u32	bic_K;		/* time to origin point
94 	u32	delay_min;	/* min delay (usec) */
95 	u32	epoch_start;	/* beginning of an epoch */
96 	u32	ack_cnt;	/* number of acks */
97 	u32	tcp_cwnd;	/* estimated tcp cwnd */
101 	u32	round_start;	/* beginning of each round */
102 	u32	end_seq;	/* end_seq of the round */
103 	u32	last_ack;	/* last time when the ACK spacing is close */
104 	u32	curr_rtt;	/* the minimum rtt of current round */
113 static inline u32 bictcp_clock_us(const struct sock *sk)  in bictcp_clock_us()
146 		u32 now = tcp_jiffies32;  in cubictcp_cwnd_event()
167 static u32 cubic_root(u64 a)  in cubic_root()
169 	u32 x, b, shift;  in cubic_root()
192 		return ((u32)v[(u32)a] + 35) >> 6;  in cubic_root()
198 	x = ((u32)(((u32)v[shift] + 10) << b)) >> 6;  in cubic_root()
206 	x = (2 * x + (u32)div64_u64(a, (u64)x * (u64)(x - 1)));  in cubic_root()
214 static inline void bictcp_update(struct bictcp *ca, u32 cwnd, u32 acked)  in bictcp_update()
216 	u32 delta, bic_target, max_cnt;  in bictcp_update()
302 		u32 scale = beta_scale;  in bictcp_update()
324 __bpf_kfunc static void cubictcp_cong_avoid(struct sock *sk, u32 ack, u32 acked)  in cubictcp_cong_avoid()
341 __bpf_kfunc static u32 cubictcp_recalc_ssthresh(struct sock *sk)  in cubictcp_recalc_ssthresh()
375 static u32 hystart_ack_delay(const struct sock *sk)  in hystart_ack_delay()
386 static void hystart_update(struct sock *sk, u32 delay)  in hystart_update()
390 	u32 threshold;  in hystart_update()
396 		u32 now = bictcp_clock_us(sk);  in hystart_update()
452 	u32 delay;  in cubictcp_acked()