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/* RLC/MAC scheduler, 3GPP TS 44.060 */
#pragma once
#include <stdint.h>
#include <osmocom/gsm/gsm_utils.h>
struct gprs_rlcmac_rts_block_ind {
uint8_t ts;
uint32_t fn;
uint8_t usf;
};
uint32_t rrbp2fn(uint32_t cur_fn, uint8_t rrbp);
int gprs_rlcmac_rcv_rts_block(struct gprs_rlcmac_rts_block_ind *bi);
static inline bool fn_valid(uint32_t fn)
{
uint32_t f = fn % 13;
return f == 0 || f == 4 || f == 8;
}
#define GSM_MAX_FN_THRESH (GSM_MAX_FN >> 1)
/* 0: equal, -1: fn1 BEFORE fn2, 1: fn1 AFTER fn2 */
static inline int fn_cmp(uint32_t fn1, uint32_t fn2)
{
if (fn1 == fn2)
return 0;
/* FN1 goes before FN2: */
if ((fn1 < fn2 && (fn2 - fn1) < GSM_MAX_FN_THRESH) ||
(fn1 > fn2 && (fn1 - fn2) > GSM_MAX_FN_THRESH))
return -1;
/* FN1 goes after FN2: */
return 1;
}
static inline uint32_t fn2bn(uint32_t fn)
{
return (fn % 52) / 4;
}
static inline uint32_t fn_next_block(uint32_t fn)
{
uint32_t bn = fn2bn(fn) + 1;
fn = fn - (fn % 52);
fn += bn * 4 + bn / 3;
return fn % GSM_MAX_FN;
}
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