diff options
Diffstat (limited to 'src/bts.cpp')
| -rw-r--r-- | src/bts.cpp | 88 |
1 files changed, 88 insertions, 0 deletions
diff --git a/src/bts.cpp b/src/bts.cpp index 7675ba36..b63a13d0 100644 --- a/src/bts.cpp +++ b/src/bts.cpp @@ -32,10 +32,17 @@ extern "C" { #include <arpa/inet.h> +#include <errno.h> #include <string.h> extern void *tall_pcu_ctx; +static llist_head *gprs_rlcmac_tbfs_lists[] = { + &gprs_rlcmac_ul_tbfs, + &gprs_rlcmac_dl_tbfs, + NULL +}; + static BTS s_bts; BTS* BTS::main_bts() @@ -67,6 +74,83 @@ void BTS::set_current_frame_number(int fn) m_pollController.expireTimedout(m_cur_fn); } +int BTS::add_paging(uint8_t chan_needed, uint8_t *identity_lv) +{ + uint8_t l, trx, ts, any_tbf = 0; + struct gprs_rlcmac_tbf *tbf; + struct gprs_rlcmac_paging *pag; + uint8_t slot_mask[8]; + int8_t first_ts; /* must be signed */ + + LOGP(DRLCMAC, LOGL_INFO, "Add RR paging: chan-needed=%d MI=%s\n", + chan_needed, osmo_hexdump(identity_lv + 1, identity_lv[0])); + + /* collect slots to page + * Mark slots for every TBF, but only mark one of it. + * Mark only the first slot found. + * Don't mark, if TBF uses a different slot that is already marked. */ + memset(slot_mask, 0, sizeof(slot_mask)); + for (l = 0; gprs_rlcmac_tbfs_lists[l]; l++) { + llist_for_each_entry(tbf, gprs_rlcmac_tbfs_lists[l], list) { + first_ts = -1; + for (ts = 0; ts < 8; ts++) { + if (tbf->pdch[ts]) { + /* remember the first slot found */ + if (first_ts < 0) + first_ts = ts; + /* break, if we already marked a slot */ + if ((slot_mask[tbf->trx_no] & (1 << ts))) + break; + } + } + /* mark first slot found, if none is marked already */ + if (ts == 8 && first_ts >= 0) { + LOGP(DRLCMAC, LOGL_DEBUG, "- %s TBF=%d uses " + "TRX=%d TS=%d, so we mark\n", + (tbf->direction == GPRS_RLCMAC_UL_TBF) + ? "UL" : "DL", + tbf->tfi, tbf->trx_no, first_ts); + slot_mask[tbf->trx_no] |= (1 << first_ts); + } else + LOGP(DRLCMAC, LOGL_DEBUG, "- %s TBF=%d uses " + "already marked TRX=%d TS=%d\n", + (tbf->direction == GPRS_RLCMAC_UL_TBF) + ? "UL" : "DL", + tbf->tfi, tbf->trx_no, ts); + } + } + + /* Now we have a list of marked slots. Every TBF uses at least one + * of these slots. */ + + /* schedule paging to all marked slots */ + for (trx = 0; trx < 8; trx++) { + if (slot_mask[trx] == 0) + continue; + any_tbf = 1; + for (ts = 0; ts < 8; ts++) { + if ((slot_mask[trx] & (1 << ts))) { + /* schedule */ + pag = talloc_zero(tall_pcu_ctx, + struct gprs_rlcmac_paging); + if (!pag) + return -ENOMEM; + pag->chan_needed = chan_needed; + memcpy(pag->identity_lv, identity_lv, + identity_lv[0] + 1); + m_bts.trx[trx].pdch[ts].add_paging(pag); + LOGP(DRLCMAC, LOGL_INFO, "Paging on PACCH of " + "TRX=%d TS=%d\n", trx, ts); + } + } + } + + if (!any_tbf) + LOGP(DRLCMAC, LOGL_INFO, "No paging, because no TBF\n"); + + return 0; +} + void gprs_rlcmac_pdch::enable() { /* TODO: Check if there are still allocated resources.. */ @@ -195,3 +279,7 @@ continue_next: return msg; } +void gprs_rlcmac_pdch::add_paging(struct gprs_rlcmac_paging *pag) +{ + llist_add(&pag->list, &paging_list); +} |