488 lines
16 KiB
C
488 lines
16 KiB
C
/* GSM Multiframe Scheduler Implementation (on top of TDMA sched) */
|
|
|
|
/* (C) 2010 by Harald Welte <laforge@gnumonks.org>
|
|
*
|
|
* All Rights Reserved
|
|
*
|
|
* This program is free software; you can redistribute it and/or modify
|
|
* it under the terms of the GNU General Public License as published by
|
|
* the Free Software Foundation; either version 2 of the License, or
|
|
* (at your option) any later version.
|
|
*
|
|
* This program is distributed in the hope that it will be useful,
|
|
* but WITHOUT ANY WARRANTY; without even the implied warranty of
|
|
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
|
|
* GNU General Public License for more details.
|
|
*
|
|
* You should have received a copy of the GNU General Public License along
|
|
* with this program; if not, write to the Free Software Foundation, Inc.,
|
|
* 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
|
|
*
|
|
*/
|
|
|
|
#include <stdint.h>
|
|
#include <stdio.h>
|
|
#include <string.h>
|
|
|
|
#include <debug.h>
|
|
|
|
#include <osmocom/gsm/gsm_utils.h>
|
|
|
|
#include <layer1/prim.h>
|
|
#include <layer1/sync.h>
|
|
#include <layer1/tdma_sched.h>
|
|
#include <layer1/mframe_sched.h>
|
|
|
|
/* A multiframe operation which can be scheduled for a multiframe */
|
|
struct mframe_sched_item {
|
|
/* The TDMA scheduler item that shall be scheduled */
|
|
const struct tdma_sched_item *sched_set;
|
|
/* Which modulo shall be used on the frame number */
|
|
uint16_t modulo;
|
|
/* At which number inside the modulo shall we be scheduled */
|
|
uint16_t frame_nr;
|
|
/* bit-mask of flags */
|
|
uint16_t flags;
|
|
};
|
|
|
|
/* FIXME: properly clean this up */
|
|
#define NB_QUAD_DL nb_sched_set
|
|
#define NB_QUAD_FH_DL NB_QUAD_DL
|
|
#define NB_QUAD_UL nb_sched_set_ul
|
|
#define NB_QUAD_FH_UL NB_QUAD_UL
|
|
#define NEIGH_PM neigh_pm_sched_set
|
|
|
|
/* BCCH Normal */
|
|
static const struct mframe_sched_item mf_bcch_norm[] = {
|
|
{ .sched_set = NB_QUAD_DL, .modulo = 51, .frame_nr = 2 },
|
|
{ .sched_set = NULL }
|
|
};
|
|
|
|
/* BCCH Extended */
|
|
static const struct mframe_sched_item mf_bcch_ext[] = {
|
|
{ .sched_set = NB_QUAD_DL, .modulo = 51, .frame_nr = 6 },
|
|
{ .sched_set = NULL }
|
|
};
|
|
|
|
/* Full CCCH in a pure BCCH + CCCH C0T0 */
|
|
static const struct mframe_sched_item mf_ccch[] = {
|
|
{ .sched_set = NB_QUAD_DL, .modulo = 51, .frame_nr = 6 },
|
|
{ .sched_set = NB_QUAD_DL, .modulo = 51, .frame_nr = 12 },
|
|
{ .sched_set = NB_QUAD_DL, .modulo = 51, .frame_nr = 16 },
|
|
{ .sched_set = NB_QUAD_DL, .modulo = 51, .frame_nr = 22 },
|
|
{ .sched_set = NB_QUAD_DL, .modulo = 51, .frame_nr = 26 },
|
|
{ .sched_set = NB_QUAD_DL, .modulo = 51, .frame_nr = 32 },
|
|
{ .sched_set = NB_QUAD_DL, .modulo = 51, .frame_nr = 36 },
|
|
{ .sched_set = NB_QUAD_DL, .modulo = 51, .frame_nr = 42 },
|
|
{ .sched_set = NB_QUAD_DL, .modulo = 51, .frame_nr = 46 },
|
|
{ .sched_set = NULL }
|
|
};
|
|
|
|
/* Full CCCH in a combined CCCH on C0T0 */
|
|
static const struct mframe_sched_item mf_ccch_comb[] = {
|
|
{ .sched_set = NB_QUAD_DL, .modulo = 51, .frame_nr = 6 },
|
|
{ .sched_set = NB_QUAD_DL, .modulo = 51, .frame_nr = 12 },
|
|
{ .sched_set = NB_QUAD_DL, .modulo = 51, .frame_nr = 16 },
|
|
{ .sched_set = NULL }
|
|
};
|
|
|
|
/* SDCCH/4 in a combined CCCH on C0T0, cannot be FH */
|
|
static const struct mframe_sched_item mf_sdcch4_0[] = {
|
|
{ .sched_set = NB_QUAD_DL, .modulo = 51, .frame_nr = 22 },
|
|
{ .sched_set = NB_QUAD_UL, .modulo = 51, .frame_nr = 22+15 },
|
|
{ .sched_set = NB_QUAD_DL, .modulo = 2*51, .frame_nr = 42,
|
|
.flags = MF_F_SACCH },
|
|
{ .sched_set = NB_QUAD_UL, .modulo = 2*51, .frame_nr = 42+15,
|
|
.flags = MF_F_SACCH },
|
|
{ .sched_set = NULL }
|
|
};
|
|
static const struct mframe_sched_item mf_sdcch4_1[] = {
|
|
{ .sched_set = NB_QUAD_DL, .modulo = 51, .frame_nr = 26 },
|
|
{ .sched_set = NB_QUAD_UL, .modulo = 51, .frame_nr = 26+15 },
|
|
{ .sched_set = NB_QUAD_DL, .modulo = 2*51, .frame_nr = 46,
|
|
.flags = MF_F_SACCH },
|
|
{ .sched_set = NB_QUAD_UL, .modulo = 2*51, .frame_nr = 46+15,
|
|
.flags = MF_F_SACCH },
|
|
{ .sched_set = NULL }
|
|
};
|
|
static const struct mframe_sched_item mf_sdcch4_2[] = {
|
|
{ .sched_set = NB_QUAD_DL, .modulo = 51, .frame_nr = 32 },
|
|
{ .sched_set = NB_QUAD_UL, .modulo = 51, .frame_nr = 32+15 },
|
|
{ .sched_set = NB_QUAD_DL, .modulo = 2*51, .frame_nr = 51+42,
|
|
.flags = MF_F_SACCH },
|
|
{ .sched_set = NB_QUAD_UL, .modulo = 2*51, .frame_nr = 51+42+15,
|
|
.flags = MF_F_SACCH },
|
|
{ .sched_set = NULL }
|
|
};
|
|
static const struct mframe_sched_item mf_sdcch4_3[] = {
|
|
{ .sched_set = NB_QUAD_DL, .modulo = 51, .frame_nr = 36 },
|
|
{ .sched_set = NB_QUAD_UL, .modulo = 51, .frame_nr = 36+15 },
|
|
{ .sched_set = NB_QUAD_DL, .modulo = 2*51, .frame_nr = 51+46,
|
|
.flags = MF_F_SACCH },
|
|
{ .sched_set = NB_QUAD_UL, .modulo = 2*51, .frame_nr = 51+46+15,
|
|
.flags = MF_F_SACCH },
|
|
{ .sched_set = NULL }
|
|
};
|
|
|
|
/* SDCCH/8, can be frequency hopping (FH) */
|
|
static const struct mframe_sched_item mf_sdcch8_0[] = {
|
|
{ .sched_set = NB_QUAD_FH_DL, .modulo = 51, .frame_nr = 0 },
|
|
{ .sched_set = NB_QUAD_FH_UL, .modulo = 51, .frame_nr = 0+15 },
|
|
{ .sched_set = NB_QUAD_FH_DL, .modulo = 2*51, .frame_nr = 32,
|
|
.flags = MF_F_SACCH },
|
|
{ .sched_set = NB_QUAD_FH_UL, .modulo = 2*51, .frame_nr = 32+15,
|
|
.flags = MF_F_SACCH },
|
|
{ .sched_set = NULL }
|
|
};
|
|
static const struct mframe_sched_item mf_sdcch8_1[] = {
|
|
{ .sched_set = NB_QUAD_FH_DL, .modulo = 51, .frame_nr = 4 },
|
|
{ .sched_set = NB_QUAD_FH_UL, .modulo = 51, .frame_nr = 4+15 },
|
|
{ .sched_set = NB_QUAD_FH_DL, .modulo = 2*51, .frame_nr = 36,
|
|
.flags = MF_F_SACCH },
|
|
{ .sched_set = NB_QUAD_FH_UL, .modulo = 2*51, .frame_nr = 36+15,
|
|
.flags = MF_F_SACCH },
|
|
{ .sched_set = NULL }
|
|
};
|
|
static const struct mframe_sched_item mf_sdcch8_2[] = {
|
|
{ .sched_set = NB_QUAD_FH_DL, .modulo = 51, .frame_nr = 8 },
|
|
{ .sched_set = NB_QUAD_FH_UL, .modulo = 51, .frame_nr = 8+15 },
|
|
{ .sched_set = NB_QUAD_FH_DL, .modulo = 2*51, .frame_nr = 40,
|
|
.flags = MF_F_SACCH },
|
|
{ .sched_set = NB_QUAD_FH_UL, .modulo = 2*51, .frame_nr = 40+15,
|
|
.flags = MF_F_SACCH },
|
|
{ .sched_set = NULL }
|
|
};
|
|
static const struct mframe_sched_item mf_sdcch8_3[] = {
|
|
{ .sched_set = NB_QUAD_FH_DL, .modulo = 51, .frame_nr = 12 },
|
|
{ .sched_set = NB_QUAD_FH_UL, .modulo = 51, .frame_nr = 12+15 },
|
|
{ .sched_set = NB_QUAD_FH_DL, .modulo = 2*51, .frame_nr = 44,
|
|
.flags = MF_F_SACCH },
|
|
{ .sched_set = NB_QUAD_FH_UL, .modulo = 2*51, .frame_nr = 44+15,
|
|
.flags = MF_F_SACCH },
|
|
{ .sched_set = NULL }
|
|
};
|
|
static const struct mframe_sched_item mf_sdcch8_4[] = {
|
|
{ .sched_set = NB_QUAD_FH_DL, .modulo = 51, .frame_nr = 16 },
|
|
{ .sched_set = NB_QUAD_FH_UL, .modulo = 51, .frame_nr = 16+15 },
|
|
{ .sched_set = NB_QUAD_FH_DL, .modulo = 2*51, .frame_nr = 51+32,
|
|
.flags = MF_F_SACCH },
|
|
{ .sched_set = NB_QUAD_FH_UL, .modulo = 2*51, .frame_nr = 51+32+15,
|
|
.flags = MF_F_SACCH },
|
|
{ .sched_set = NULL }
|
|
};
|
|
static const struct mframe_sched_item mf_sdcch8_5[] = {
|
|
{ .sched_set = NB_QUAD_FH_DL, .modulo = 51, .frame_nr = 20 },
|
|
{ .sched_set = NB_QUAD_FH_UL, .modulo = 51, .frame_nr = 20+15 },
|
|
{ .sched_set = NB_QUAD_FH_DL, .modulo = 2*51, .frame_nr = 51+36,
|
|
.flags = MF_F_SACCH },
|
|
{ .sched_set = NB_QUAD_FH_UL, .modulo = 2*51, .frame_nr = 51+36+15,
|
|
.flags = MF_F_SACCH },
|
|
{ .sched_set = NULL }
|
|
};
|
|
static const struct mframe_sched_item mf_sdcch8_6[] = {
|
|
{ .sched_set = NB_QUAD_FH_DL, .modulo = 51, .frame_nr = 24 },
|
|
{ .sched_set = NB_QUAD_FH_UL, .modulo = 51, .frame_nr = 24+15 },
|
|
{ .sched_set = NB_QUAD_FH_DL, .modulo = 2*51, .frame_nr = 51+40,
|
|
.flags = MF_F_SACCH },
|
|
{ .sched_set = NB_QUAD_FH_UL, .modulo = 2*51, .frame_nr = 51+40+15,
|
|
.flags = MF_F_SACCH },
|
|
{ .sched_set = NULL }
|
|
};
|
|
static const struct mframe_sched_item mf_sdcch8_7[] = {
|
|
{ .sched_set = NB_QUAD_FH_DL, .modulo = 51, .frame_nr = 28 },
|
|
{ .sched_set = NB_QUAD_FH_UL, .modulo = 51, .frame_nr = 28+15 },
|
|
{ .sched_set = NB_QUAD_FH_DL, .modulo = 2*51, .frame_nr = 51+44,
|
|
.flags = MF_F_SACCH },
|
|
{ .sched_set = NB_QUAD_FH_UL, .modulo = 2*51, .frame_nr = 51+44+15,
|
|
.flags = MF_F_SACCH },
|
|
{ .sched_set = NULL }
|
|
};
|
|
|
|
/* Measurement for MF 51 */
|
|
static const struct mframe_sched_item mf_neigh_pm51[] = {
|
|
{ .sched_set = NEIGH_PM , .modulo = 51, .frame_nr = 0 },
|
|
{ .sched_set = NEIGH_PM , .modulo = 51, .frame_nr = 10 },
|
|
{ .sched_set = NEIGH_PM , .modulo = 51, .frame_nr = 20 },
|
|
{ .sched_set = NEIGH_PM , .modulo = 51, .frame_nr = 30 },
|
|
{ .sched_set = NEIGH_PM , .modulo = 51, .frame_nr = 40 },
|
|
{ .sched_set = NULL }
|
|
};
|
|
|
|
/* TCH */
|
|
#define TCH tch_sched_set
|
|
#define TCH_A tch_a_sched_set
|
|
#define TCH_D tch_d_sched_set
|
|
|
|
static const struct mframe_sched_item mf_tch_f_even[] = {
|
|
{ .sched_set = TCH, .modulo = 13, .frame_nr = 0 },
|
|
{ .sched_set = TCH, .modulo = 13, .frame_nr = 1 },
|
|
{ .sched_set = TCH, .modulo = 13, .frame_nr = 2 },
|
|
{ .sched_set = TCH, .modulo = 13, .frame_nr = 3 },
|
|
{ .sched_set = TCH, .modulo = 13, .frame_nr = 4 },
|
|
{ .sched_set = TCH, .modulo = 13, .frame_nr = 5 },
|
|
{ .sched_set = TCH, .modulo = 13, .frame_nr = 6 },
|
|
{ .sched_set = TCH, .modulo = 13, .frame_nr = 7 },
|
|
{ .sched_set = TCH, .modulo = 13, .frame_nr = 8 },
|
|
{ .sched_set = TCH, .modulo = 13, .frame_nr = 9 },
|
|
{ .sched_set = TCH, .modulo = 13, .frame_nr = 10 },
|
|
{ .sched_set = TCH, .modulo = 13, .frame_nr = 11 },
|
|
{ .sched_set = TCH_A, .modulo = 26, .frame_nr = 12,
|
|
.flags = MF_F_SACCH },
|
|
{ .sched_set = NULL }
|
|
};
|
|
|
|
static const struct mframe_sched_item mf_tch_f_odd[] = {
|
|
{ .sched_set = TCH, .modulo = 13, .frame_nr = 0 },
|
|
{ .sched_set = TCH, .modulo = 13, .frame_nr = 1 },
|
|
{ .sched_set = TCH, .modulo = 13, .frame_nr = 2 },
|
|
{ .sched_set = TCH, .modulo = 13, .frame_nr = 3 },
|
|
{ .sched_set = TCH, .modulo = 13, .frame_nr = 4 },
|
|
{ .sched_set = TCH, .modulo = 13, .frame_nr = 5 },
|
|
{ .sched_set = TCH, .modulo = 13, .frame_nr = 6 },
|
|
{ .sched_set = TCH, .modulo = 13, .frame_nr = 7 },
|
|
{ .sched_set = TCH, .modulo = 13, .frame_nr = 8 },
|
|
{ .sched_set = TCH, .modulo = 13, .frame_nr = 9 },
|
|
{ .sched_set = TCH, .modulo = 13, .frame_nr = 10 },
|
|
{ .sched_set = TCH, .modulo = 13, .frame_nr = 11 },
|
|
{ .sched_set = TCH_A, .modulo = 26, .frame_nr = 25,
|
|
.flags = MF_F_SACCH },
|
|
{ .sched_set = NULL }
|
|
};
|
|
|
|
static const struct mframe_sched_item mf_tch_h_0[] = {
|
|
{ .sched_set = TCH, .modulo = 13, .frame_nr = 0 },
|
|
{ .sched_set = TCH_D, .modulo = 13, .frame_nr = 1 },
|
|
{ .sched_set = TCH, .modulo = 13, .frame_nr = 2 },
|
|
{ .sched_set = TCH_D, .modulo = 13, .frame_nr = 3 },
|
|
{ .sched_set = TCH, .modulo = 13, .frame_nr = 4 },
|
|
{ .sched_set = TCH_D, .modulo = 13, .frame_nr = 5 },
|
|
{ .sched_set = TCH, .modulo = 13, .frame_nr = 6 },
|
|
{ .sched_set = TCH_D, .modulo = 13, .frame_nr = 7 },
|
|
{ .sched_set = TCH, .modulo = 13, .frame_nr = 8 },
|
|
{ .sched_set = TCH_D, .modulo = 13, .frame_nr = 9 },
|
|
{ .sched_set = TCH, .modulo = 13, .frame_nr = 10 },
|
|
{ .sched_set = TCH_D, .modulo = 13, .frame_nr = 11 },
|
|
{ .sched_set = TCH_A, .modulo = 26, .frame_nr = 12,
|
|
.flags = MF_F_SACCH },
|
|
{ .sched_set = NULL }
|
|
};
|
|
|
|
static const struct mframe_sched_item mf_tch_h_1[] = {
|
|
{ .sched_set = TCH_D, .modulo = 13, .frame_nr = 0 },
|
|
{ .sched_set = TCH, .modulo = 13, .frame_nr = 1 },
|
|
{ .sched_set = TCH_D, .modulo = 13, .frame_nr = 2 },
|
|
{ .sched_set = TCH, .modulo = 13, .frame_nr = 3 },
|
|
{ .sched_set = TCH_D, .modulo = 13, .frame_nr = 4 },
|
|
{ .sched_set = TCH, .modulo = 13, .frame_nr = 5 },
|
|
{ .sched_set = TCH_D, .modulo = 13, .frame_nr = 6 },
|
|
{ .sched_set = TCH, .modulo = 13, .frame_nr = 7 },
|
|
{ .sched_set = TCH_D, .modulo = 13, .frame_nr = 8 },
|
|
{ .sched_set = TCH, .modulo = 13, .frame_nr = 9 },
|
|
{ .sched_set = TCH_D, .modulo = 13, .frame_nr = 10 },
|
|
{ .sched_set = TCH, .modulo = 13, .frame_nr = 11 },
|
|
{ .sched_set = TCH_A, .modulo = 26, .frame_nr = 25,
|
|
.flags = MF_F_SACCH },
|
|
{ .sched_set = NULL }
|
|
};
|
|
|
|
/* Measurement for MF 26 */
|
|
static const struct mframe_sched_item mf_neigh_pm26_even[] = {
|
|
{ .sched_set = NEIGH_PM , .modulo = 26, .frame_nr = 25 },
|
|
{ .sched_set = NULL }
|
|
};
|
|
static const struct mframe_sched_item mf_neigh_pm26_odd[] = {
|
|
{ .sched_set = NEIGH_PM , .modulo = 26, .frame_nr = 12 },
|
|
{ .sched_set = NULL }
|
|
};
|
|
|
|
/* Test TX */
|
|
static const struct mframe_sched_item mf_tx_all_nb[] = {
|
|
{ .sched_set = NB_QUAD_FH_UL, .modulo = 4, .frame_nr = 0 },
|
|
{ .sched_set = NULL }
|
|
};
|
|
|
|
static const struct mframe_sched_item *sched_set_for_task[32] = {
|
|
[MF_TASK_BCCH_NORM] = mf_bcch_norm,
|
|
[MF_TASK_BCCH_EXT] = mf_bcch_ext,
|
|
[MF_TASK_CCCH] = mf_ccch,
|
|
[MF_TASK_CCCH_COMB] = mf_ccch_comb,
|
|
|
|
[MF_TASK_SDCCH4_0] = mf_sdcch4_0,
|
|
[MF_TASK_SDCCH4_1] = mf_sdcch4_1,
|
|
[MF_TASK_SDCCH4_2] = mf_sdcch4_2,
|
|
[MF_TASK_SDCCH4_3] = mf_sdcch4_3,
|
|
|
|
[MF_TASK_SDCCH8_0] = mf_sdcch8_0,
|
|
[MF_TASK_SDCCH8_1] = mf_sdcch8_1,
|
|
[MF_TASK_SDCCH8_2] = mf_sdcch8_2,
|
|
[MF_TASK_SDCCH8_3] = mf_sdcch8_3,
|
|
[MF_TASK_SDCCH8_4] = mf_sdcch8_4,
|
|
[MF_TASK_SDCCH8_5] = mf_sdcch8_5,
|
|
[MF_TASK_SDCCH8_6] = mf_sdcch8_6,
|
|
[MF_TASK_SDCCH8_7] = mf_sdcch8_7,
|
|
|
|
[MF_TASK_TCH_F_EVEN] = mf_tch_f_even,
|
|
[MF_TASK_TCH_F_ODD] = mf_tch_f_odd,
|
|
[MF_TASK_TCH_H_0] = mf_tch_h_0,
|
|
[MF_TASK_TCH_H_1] = mf_tch_h_1,
|
|
|
|
[MF_TASK_NEIGH_PM51] = mf_neigh_pm51,
|
|
[MF_TASK_NEIGH_PM26E] = mf_neigh_pm26_even,
|
|
[MF_TASK_NEIGH_PM26O] = mf_neigh_pm26_odd,
|
|
|
|
[MF_TASK_UL_ALL_NB] = mf_tx_all_nb,
|
|
};
|
|
|
|
/* encodes a channel number according to 08.58 Chapter 9.3.1 */
|
|
uint8_t mframe_task2chan_nr(enum mframe_task mft, uint8_t ts)
|
|
{
|
|
uint8_t cbits;
|
|
|
|
switch (mft) {
|
|
case MF_TASK_BCCH_NORM:
|
|
case MF_TASK_BCCH_EXT:
|
|
cbits = 0x10;
|
|
break;
|
|
case MF_TASK_CCCH:
|
|
case MF_TASK_CCCH_COMB:
|
|
cbits = 0x12;
|
|
break;
|
|
case MF_TASK_SDCCH4_0:
|
|
cbits = 0x04 + 0;
|
|
break;
|
|
case MF_TASK_SDCCH4_1:
|
|
cbits = 0x04 + 1;
|
|
break;
|
|
case MF_TASK_SDCCH4_2:
|
|
cbits = 0x04 + 2;
|
|
break;
|
|
case MF_TASK_SDCCH4_3:
|
|
cbits = 0x04 + 3;
|
|
break;
|
|
case MF_TASK_SDCCH8_0:
|
|
cbits = 0x08 + 0;
|
|
break;
|
|
case MF_TASK_SDCCH8_1:
|
|
cbits = 0x08 + 1;
|
|
break;
|
|
case MF_TASK_SDCCH8_2:
|
|
cbits = 0x08 + 2;
|
|
break;
|
|
case MF_TASK_SDCCH8_3:
|
|
cbits = 0x08 + 3;
|
|
break;
|
|
case MF_TASK_SDCCH8_4:
|
|
cbits = 0x08 + 4;
|
|
break;
|
|
case MF_TASK_SDCCH8_5:
|
|
cbits = 0x08 + 5;
|
|
break;
|
|
case MF_TASK_SDCCH8_6:
|
|
cbits = 0x08 + 6;
|
|
break;
|
|
case MF_TASK_SDCCH8_7:
|
|
cbits = 0x08 + 7;
|
|
break;
|
|
case MF_TASK_TCH_F_EVEN:
|
|
case MF_TASK_TCH_F_ODD:
|
|
cbits = 0x01;
|
|
break;
|
|
case MF_TASK_TCH_H_0:
|
|
cbits = 0x02 + 0;
|
|
break;
|
|
case MF_TASK_TCH_H_1:
|
|
cbits = 0x02 + 1;
|
|
break;
|
|
case MF_TASK_UL_ALL_NB:
|
|
/* ERROR: cannot express as channel number */
|
|
cbits = 0;
|
|
break;
|
|
}
|
|
|
|
return (cbits << 3) | (ts & 0x7);
|
|
}
|
|
|
|
/* how many TDMA frame ticks should we schedule events ahead? */
|
|
#define SCHEDULE_AHEAD 2
|
|
|
|
/* how long do we need to tell the DSP in advance what we want to do? */
|
|
#define SCHEDULE_LATENCY 1
|
|
|
|
/* (test and) schedule one particular sched_item_set by means of the TDMA scheduler */
|
|
static void mframe_schedule_set(enum mframe_task task_id)
|
|
{
|
|
const struct mframe_sched_item *set = sched_set_for_task[task_id];
|
|
const struct mframe_sched_item *si;
|
|
|
|
for (si = set; si->sched_set != NULL; si++) {
|
|
unsigned int trigger = si->frame_nr % si->modulo;
|
|
unsigned int current = (l1s.current_time.fn + SCHEDULE_AHEAD) % si->modulo;
|
|
if (current == trigger) {
|
|
uint32_t fn;
|
|
int rv;
|
|
|
|
/* Schedule the set */
|
|
/* FIXME: what to do with SACCH Flag etc? */
|
|
rv = tdma_schedule_set(SCHEDULE_AHEAD-SCHEDULE_LATENCY,
|
|
si->sched_set, task_id | (si->flags<<8));
|
|
|
|
/* Compute the next safe time to queue a DSP command */
|
|
fn = l1s.current_time.fn;
|
|
ADD_MODULO(fn, rv - 2, GSM_MAX_FN); /* -2 = worst case last dsp command */
|
|
if ((fn > l1s.mframe_sched.safe_fn) ||
|
|
(l1s.mframe_sched.safe_fn >= GSM_MAX_FN))
|
|
l1s.mframe_sched.safe_fn = fn;
|
|
}
|
|
}
|
|
}
|
|
|
|
/* Enable a specific task */
|
|
void mframe_enable(enum mframe_task task_id)
|
|
{
|
|
l1s.mframe_sched.tasks_tgt |= (1 << task_id);
|
|
}
|
|
|
|
/* Disable a specific task */
|
|
void mframe_disable(enum mframe_task task_id)
|
|
{
|
|
l1s.mframe_sched.tasks_tgt &= ~(1 << task_id);
|
|
}
|
|
|
|
/* Replace the current active set by the new one */
|
|
void mframe_set(uint32_t tasks)
|
|
{
|
|
l1s.mframe_sched.tasks_tgt = tasks;
|
|
}
|
|
|
|
/* Schedule mframe_sched_items according to current MF TASK list */
|
|
void mframe_schedule(void)
|
|
{
|
|
unsigned int i;
|
|
int fn_diff;
|
|
|
|
/* Try to enable/disable task to meet target bitmap */
|
|
fn_diff = l1s.mframe_sched.safe_fn - l1s.current_time.fn;
|
|
if ((fn_diff <= 0) || (fn_diff >= (GSM_MAX_FN>>1)) ||
|
|
(l1s.mframe_sched.safe_fn >= GSM_MAX_FN))
|
|
/* If nothing is in the way, enable new tasks */
|
|
l1s.mframe_sched.tasks = l1s.mframe_sched.tasks_tgt;
|
|
else
|
|
/* Else, Disable only */
|
|
l1s.mframe_sched.tasks &= l1s.mframe_sched.tasks_tgt;
|
|
|
|
/* Schedule any active pending set */
|
|
for (i = 0; i < 32; i++) {
|
|
if (l1s.mframe_sched.tasks & (1 << i))
|
|
mframe_schedule_set(i);
|
|
}
|
|
}
|
|
|
|
/* reset the scheduler, disabling all tasks */
|
|
void mframe_reset(void)
|
|
{
|
|
l1s.mframe_sched.tasks = 0;
|
|
l1s.mframe_sched.tasks_tgt = 0;
|
|
l1s.mframe_sched.safe_fn = -1UL; /* Force safe */
|
|
}
|
|
|