Daniel Willmann | ca102af | 2014-08-08 12:14:12 +0200 | [diff] [blame] | 1 | /* Copied from tbf.cpp |
| 2 | * |
| 3 | * Copyright (C) 2012 Ivan Klyuchnikov |
| 4 | * Copyright (C) 2012 Andreas Eversberg <jolly@eversberg.eu> |
| 5 | * Copyright (C) 2013 by Holger Hans Peter Freyther |
| 6 | * |
| 7 | * This program is free software; you can redistribute it and/or |
| 8 | * modify it under the terms of the GNU General Public License |
| 9 | * as published by the Free Software Foundation; either version 2 |
| 10 | * of the License, or (at your option) any later version. |
| 11 | * |
| 12 | * This program is distributed in the hope that it will be useful, |
| 13 | * but WITHOUT ANY WARRANTY; without even the implied warranty of |
| 14 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the |
| 15 | * GNU General Public License for more details. |
| 16 | * |
| 17 | * You should have received a copy of the GNU General Public License |
| 18 | * along with this program; if not, write to the Free Software |
| 19 | * Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA. |
| 20 | */ |
| 21 | |
| 22 | #include <bts.h> |
| 23 | #include <tbf.h> |
| 24 | #include <rlc.h> |
| 25 | #include <encoding.h> |
| 26 | #include <gprs_rlcmac.h> |
| 27 | #include <gprs_debug.h> |
| 28 | #include <gprs_bssgp_pcu.h> |
| 29 | #include <decoding.h> |
Jacob Erlbeck | 20f6fd1 | 2015-06-08 11:05:45 +0200 | [diff] [blame] | 30 | #include <pcu_l1_if.h> |
Daniel Willmann | ca102af | 2014-08-08 12:14:12 +0200 | [diff] [blame] | 31 | |
sivasankari | 8adfcd0 | 2017-01-16 15:41:21 +0530 | [diff] [blame] | 32 | #include "pcu_utils.h" |
| 33 | |
Daniel Willmann | ca102af | 2014-08-08 12:14:12 +0200 | [diff] [blame] | 34 | extern "C" { |
| 35 | #include <osmocom/core/msgb.h> |
| 36 | #include <osmocom/core/talloc.h> |
| 37 | } |
| 38 | |
| 39 | #include <errno.h> |
| 40 | #include <string.h> |
| 41 | |
| 42 | /* After receiving these frames, we send ack/nack. */ |
| 43 | #define SEND_ACK_AFTER_FRAMES 20 |
| 44 | |
| 45 | extern void *tall_pcu_ctx; |
| 46 | |
Jacob Erlbeck | b3100e1 | 2015-12-14 13:36:13 +0100 | [diff] [blame] | 47 | /* |
| 48 | * Store received block data in LLC message(s) and forward to SGSN |
| 49 | * if complete. |
| 50 | */ |
| 51 | int gprs_rlcmac_ul_tbf::assemble_forward_llc(const gprs_rlc_data *_data) |
| 52 | { |
| 53 | const uint8_t *data = _data->block; |
| 54 | uint8_t len = _data->len; |
Jacob Erlbeck | f2ba4cb | 2016-01-07 18:59:28 +0100 | [diff] [blame] | 55 | const struct gprs_rlc_data_block_info *rdbi = &_data->block_info; |
Aravind Sirsikar | 9149552 | 2016-07-12 14:17:12 +0530 | [diff] [blame] | 56 | GprsCodingScheme cs = _data->cs_last; |
Jacob Erlbeck | b3100e1 | 2015-12-14 13:36:13 +0100 | [diff] [blame] | 57 | |
| 58 | Decoding::RlcData frames[16], *frame; |
| 59 | int i, num_frames = 0; |
| 60 | uint32_t dummy_tlli; |
| 61 | |
| 62 | LOGP(DRLCMACUL, LOGL_DEBUG, "- Assembling frames: (len=%d)\n", len); |
| 63 | |
| 64 | num_frames = Decoding::rlc_data_from_ul_data( |
Alexander Couzens | ce936f3 | 2016-05-24 14:45:41 +0200 | [diff] [blame] | 65 | rdbi, cs, data, &(frames[0]), ARRAY_SIZE(frames), |
Jacob Erlbeck | b3100e1 | 2015-12-14 13:36:13 +0100 | [diff] [blame] | 66 | &dummy_tlli); |
| 67 | |
| 68 | /* create LLC frames */ |
| 69 | for (i = 0; i < num_frames; i++) { |
| 70 | frame = frames + i; |
| 71 | |
Aravind Sirsikar | 22a9019 | 2016-09-15 17:24:49 +0530 | [diff] [blame] | 72 | if (frame->length) { |
| 73 | bts->rlc_ul_payload_bytes(frame->length); |
Alexander Couzens | 7fdbf89 | 2016-05-21 19:45:23 +0200 | [diff] [blame] | 74 | |
Aravind Sirsikar | 22a9019 | 2016-09-15 17:24:49 +0530 | [diff] [blame] | 75 | LOGP(DRLCMACUL, LOGL_DEBUG, "-- Frame %d " |
| 76 | "starts at offset %d, " |
| 77 | "length=%d, is_complete=%d\n", |
| 78 | i + 1, frame->offset, frame->length, |
| 79 | frame->is_complete); |
Jacob Erlbeck | b3100e1 | 2015-12-14 13:36:13 +0100 | [diff] [blame] | 80 | |
Aravind Sirsikar | 22a9019 | 2016-09-15 17:24:49 +0530 | [diff] [blame] | 81 | m_llc.append_frame(data + frame->offset, frame->length); |
| 82 | m_llc.consume(frame->length); |
| 83 | } |
Jacob Erlbeck | b3100e1 | 2015-12-14 13:36:13 +0100 | [diff] [blame] | 84 | |
| 85 | if (frame->is_complete) { |
| 86 | /* send frame to SGSN */ |
| 87 | LOGP(DRLCMACUL, LOGL_INFO, "%s complete UL frame len=%d\n", |
| 88 | tbf_name(this) , m_llc.frame_length()); |
| 89 | snd_ul_ud(); |
Alexander Couzens | 7fdbf89 | 2016-05-21 19:45:23 +0200 | [diff] [blame] | 90 | bts->llc_ul_bytes(m_llc.frame_length()); |
Jacob Erlbeck | b3100e1 | 2015-12-14 13:36:13 +0100 | [diff] [blame] | 91 | m_llc.reset(); |
| 92 | } |
| 93 | } |
| 94 | |
| 95 | return 0; |
| 96 | } |
| 97 | |
Max | fd13f6c | 2017-07-07 14:29:36 +0200 | [diff] [blame] | 98 | bool gprs_rlcmac_ul_tbf::ctrl_ack_to_toggle() |
| 99 | { |
| 100 | if ((state_flags & (1 << GPRS_RLCMAC_FLAG_TO_UL_ACK))) { |
| 101 | state_flags &= ~(1 << GPRS_RLCMAC_FLAG_TO_UL_ACK); |
| 102 | return true; /* GPRS_RLCMAC_FLAG_TO_UL_ACK was set, now cleared */ |
| 103 | } |
| 104 | |
| 105 | state_flags |= (1 << GPRS_RLCMAC_FLAG_TO_UL_ACK); |
| 106 | return false; /* GPRS_RLCMAC_FLAG_TO_UL_ACK was unset, now set */ |
| 107 | } |
| 108 | |
| 109 | bool gprs_rlcmac_ul_tbf::handle_ctrl_ack() |
| 110 | { |
| 111 | /* check if this control ack belongs to packet uplink ack */ |
| 112 | if (ul_ack_state == GPRS_RLCMAC_UL_ACK_WAIT_ACK) { |
| 113 | ul_ack_state = GPRS_RLCMAC_UL_ACK_NONE; |
| 114 | return true; |
| 115 | } |
| 116 | |
| 117 | return false; |
| 118 | } |
Daniel Willmann | ca102af | 2014-08-08 12:14:12 +0200 | [diff] [blame] | 119 | |
Jacob Erlbeck | 5a3c84d | 2016-01-22 17:25:38 +0100 | [diff] [blame] | 120 | struct msgb *gprs_rlcmac_ul_tbf::create_ul_ack(uint32_t fn, uint8_t ts) |
Daniel Willmann | ca102af | 2014-08-08 12:14:12 +0200 | [diff] [blame] | 121 | { |
| 122 | int final = (state_is(GPRS_RLCMAC_FINISHED)); |
| 123 | struct msgb *msg; |
Jacob Erlbeck | f2694b7 | 2016-01-26 21:46:26 +0100 | [diff] [blame] | 124 | int rc; |
| 125 | unsigned int rrbp = 0; |
| 126 | uint32_t new_poll_fn = 0; |
Daniel Willmann | ca102af | 2014-08-08 12:14:12 +0200 | [diff] [blame] | 127 | |
| 128 | if (final) { |
Jacob Erlbeck | f2694b7 | 2016-01-26 21:46:26 +0100 | [diff] [blame] | 129 | if (poll_state == GPRS_RLCMAC_POLL_SCHED && |
| 130 | ul_ack_state == GPRS_RLCMAC_UL_ACK_WAIT_ACK) { |
Daniel Willmann | ca102af | 2014-08-08 12:14:12 +0200 | [diff] [blame] | 131 | LOGP(DRLCMACUL, LOGL_DEBUG, "Polling is already " |
Jacob Erlbeck | f2694b7 | 2016-01-26 21:46:26 +0100 | [diff] [blame] | 132 | "scheduled for %s, so we must wait for " |
| 133 | "the final uplink ack...\n", tbf_name(this)); |
Daniel Willmann | ca102af | 2014-08-08 12:14:12 +0200 | [diff] [blame] | 134 | return NULL; |
| 135 | } |
Jacob Erlbeck | f2694b7 | 2016-01-26 21:46:26 +0100 | [diff] [blame] | 136 | |
| 137 | rc = check_polling(fn, ts, &new_poll_fn, &rrbp); |
| 138 | if (rc < 0) |
Daniel Willmann | ca102af | 2014-08-08 12:14:12 +0200 | [diff] [blame] | 139 | return NULL; |
Daniel Willmann | ca102af | 2014-08-08 12:14:12 +0200 | [diff] [blame] | 140 | } |
| 141 | |
| 142 | msg = msgb_alloc(23, "rlcmac_ul_ack"); |
| 143 | if (!msg) |
| 144 | return NULL; |
Alexander Couzens | ccde5c9 | 2017-02-04 03:10:08 +0100 | [diff] [blame] | 145 | bitvec *ack_vec = bitvec_alloc(23, tall_pcu_ctx); |
Daniel Willmann | ca102af | 2014-08-08 12:14:12 +0200 | [diff] [blame] | 146 | if (!ack_vec) { |
| 147 | msgb_free(msg); |
| 148 | return NULL; |
| 149 | } |
| 150 | bitvec_unhex(ack_vec, |
| 151 | "2b2b2b2b2b2b2b2b2b2b2b2b2b2b2b2b2b2b2b2b2b2b2b"); |
Jacob Erlbeck | f2694b7 | 2016-01-26 21:46:26 +0100 | [diff] [blame] | 152 | Encoding::write_packet_uplink_ack(bts_data(), ack_vec, this, final, rrbp); |
Daniel Willmann | ca102af | 2014-08-08 12:14:12 +0200 | [diff] [blame] | 153 | bitvec_pack(ack_vec, msgb_put(msg, 23)); |
| 154 | bitvec_free(ack_vec); |
Daniel Willmann | ca102af | 2014-08-08 12:14:12 +0200 | [diff] [blame] | 155 | |
| 156 | /* now we must set this flag, so we are allowed to assign downlink |
| 157 | * TBF on PACCH. it is only allowed when TLLI is acknowledged. */ |
| 158 | m_contention_resolution_done = 1; |
| 159 | |
| 160 | if (final) { |
Jacob Erlbeck | f2694b7 | 2016-01-26 21:46:26 +0100 | [diff] [blame] | 161 | set_polling(new_poll_fn, ts); |
Daniel Willmann | ca102af | 2014-08-08 12:14:12 +0200 | [diff] [blame] | 162 | /* waiting for final acknowledge */ |
| 163 | ul_ack_state = GPRS_RLCMAC_UL_ACK_WAIT_ACK; |
| 164 | m_final_ack_sent = 1; |
| 165 | } else |
| 166 | ul_ack_state = GPRS_RLCMAC_UL_ACK_NONE; |
| 167 | |
| 168 | return msg; |
| 169 | } |
| 170 | |
Alexander Couzens | 2fcfc29 | 2016-05-24 14:40:03 +0200 | [diff] [blame] | 171 | /*! \brief receive data from PDCH/L1 */ |
Jacob Erlbeck | b3100e1 | 2015-12-14 13:36:13 +0100 | [diff] [blame] | 172 | int gprs_rlcmac_ul_tbf::rcv_data_block_acknowledged( |
Jacob Erlbeck | f2ba4cb | 2016-01-07 18:59:28 +0100 | [diff] [blame] | 173 | const struct gprs_rlc_data_info *rlc, |
Jacob Erlbeck | fc1b3e6 | 2016-01-11 09:58:11 +0100 | [diff] [blame] | 174 | uint8_t *data, struct pcu_l1_meas *meas) |
Jacob Erlbeck | b3100e1 | 2015-12-14 13:36:13 +0100 | [diff] [blame] | 175 | { |
| 176 | int8_t rssi = meas->have_rssi ? meas->rssi : 0; |
| 177 | |
Jacob Erlbeck | b3100e1 | 2015-12-14 13:36:13 +0100 | [diff] [blame] | 178 | const uint16_t ws = m_window.ws(); |
| 179 | |
| 180 | this->state_flags |= (1 << GPRS_RLCMAC_FLAG_UL_DATA); |
| 181 | |
| 182 | LOGP(DRLCMACUL, LOGL_DEBUG, "UL DATA TFI=%d received (V(Q)=%d .. " |
| 183 | "V(R)=%d)\n", rlc->tfi, this->m_window.v_q(), |
| 184 | this->m_window.v_r()); |
| 185 | |
| 186 | /* process RSSI */ |
| 187 | gprs_rlcmac_rssi(this, rssi); |
| 188 | |
| 189 | /* store measurement values */ |
| 190 | if (ms()) |
| 191 | ms()->update_l1_meas(meas); |
| 192 | |
| 193 | uint32_t new_tlli = 0; |
| 194 | unsigned int block_idx; |
| 195 | |
| 196 | /* restart T3169 */ |
| 197 | tbf_timer_start(this, 3169, bts_data()->t3169, 0); |
| 198 | |
| 199 | /* Increment RX-counter */ |
| 200 | this->m_rx_counter++; |
Mrinal Mishra | f86307e | 2016-11-10 18:16:30 +0530 | [diff] [blame] | 201 | update_coding_scheme_counter_ul(rlc->cs); |
Jacob Erlbeck | b3100e1 | 2015-12-14 13:36:13 +0100 | [diff] [blame] | 202 | /* Loop over num_blocks */ |
| 203 | for (block_idx = 0; block_idx < rlc->num_data_blocks; block_idx++) { |
| 204 | int num_chunks; |
| 205 | uint8_t *rlc_data; |
Jacob Erlbeck | f2ba4cb | 2016-01-07 18:59:28 +0100 | [diff] [blame] | 206 | const struct gprs_rlc_data_block_info *rdbi = |
Jacob Erlbeck | b3100e1 | 2015-12-14 13:36:13 +0100 | [diff] [blame] | 207 | &rlc->block_info[block_idx]; |
| 208 | bool need_rlc_data = false; |
| 209 | struct gprs_rlc_data *block; |
| 210 | |
| 211 | LOGP(DRLCMACUL, LOGL_DEBUG, |
| 212 | "%s: Got %s RLC data block: " |
| 213 | "CV=%d, BSN=%d, SPB=%d, " |
| 214 | "PI=%d, E=%d, TI=%d, bitoffs=%d\n", |
| 215 | name(), rlc->cs.name(), |
| 216 | rdbi->cv, rdbi->bsn, rdbi->spb, |
| 217 | rdbi->pi, rdbi->e, rdbi->ti, |
| 218 | rlc->data_offs_bits[block_idx]); |
| 219 | |
| 220 | /* Check whether the block needs to be decoded */ |
| 221 | |
| 222 | if (!m_window.is_in_window(rdbi->bsn)) { |
| 223 | LOGP(DRLCMACUL, LOGL_DEBUG, "- BSN %d out of window " |
| 224 | "%d..%d (it's normal)\n", rdbi->bsn, |
| 225 | m_window.v_q(), |
Jacob Erlbeck | 93c55d0 | 2015-12-23 16:29:07 +0100 | [diff] [blame] | 226 | m_window.mod_sns(m_window.v_q() + ws - 1)); |
Jacob Erlbeck | b3100e1 | 2015-12-14 13:36:13 +0100 | [diff] [blame] | 227 | } else if (m_window.is_received(rdbi->bsn)) { |
| 228 | LOGP(DRLCMACUL, LOGL_DEBUG, |
| 229 | "- BSN %d already received\n", rdbi->bsn); |
| 230 | } else { |
| 231 | need_rlc_data = true; |
| 232 | } |
| 233 | |
| 234 | if (!is_tlli_valid()) { |
| 235 | if (!rdbi->ti) { |
| 236 | LOGP(DRLCMACUL, LOGL_NOTICE, |
| 237 | "%s: Missing TLLI within UL DATA.\n", |
| 238 | name()); |
| 239 | continue; |
| 240 | } |
| 241 | need_rlc_data = true; |
| 242 | } |
| 243 | |
| 244 | if (!need_rlc_data) |
| 245 | continue; |
| 246 | |
| 247 | /* Store block and meta info to BSN buffer */ |
| 248 | |
| 249 | LOGP(DRLCMACUL, LOGL_DEBUG, "- BSN %d storing in window (%d..%d)\n", |
| 250 | rdbi->bsn, m_window.v_q(), |
Jacob Erlbeck | 93c55d0 | 2015-12-23 16:29:07 +0100 | [diff] [blame] | 251 | m_window.mod_sns(m_window.v_q() + ws - 1)); |
Jacob Erlbeck | b3100e1 | 2015-12-14 13:36:13 +0100 | [diff] [blame] | 252 | block = m_rlc.block(rdbi->bsn); |
Aravind Sirsikar | 550a541 | 2016-06-14 18:59:18 +0530 | [diff] [blame] | 253 | OSMO_ASSERT(rdbi->data_len <= sizeof(block->block)); |
Jacob Erlbeck | b3100e1 | 2015-12-14 13:36:13 +0100 | [diff] [blame] | 254 | rlc_data = &(block->block[0]); |
Jacob Erlbeck | b3100e1 | 2015-12-14 13:36:13 +0100 | [diff] [blame] | 255 | |
Aravind Sirsikar | 505a86d | 2016-07-26 18:26:21 +0530 | [diff] [blame] | 256 | if (rdbi->spb) { |
| 257 | egprs_rlc_ul_reseg_bsn_state assemble_status; |
| 258 | |
| 259 | assemble_status = handle_egprs_ul_spb(rlc, |
| 260 | block, data, block_idx); |
| 261 | |
| 262 | if (assemble_status != EGPRS_RESEG_DEFAULT) |
| 263 | return 0; |
| 264 | } else { |
| 265 | block->block_info = *rdbi; |
| 266 | block->cs_last = rlc->cs; |
| 267 | block->len = |
| 268 | Decoding::rlc_copy_to_aligned_buffer(rlc, |
| 269 | block_idx, data, rlc_data); |
| 270 | } |
Jacob Erlbeck | b3100e1 | 2015-12-14 13:36:13 +0100 | [diff] [blame] | 271 | |
Jacob Erlbeck | d88bb2e | 2015-12-11 14:53:29 +0100 | [diff] [blame] | 272 | LOGP(DRLCMACUL, LOGL_DEBUG, |
| 273 | "%s: data_length=%d, data=%s\n", |
| 274 | name(), block->len, osmo_hexdump(rlc_data, block->len)); |
Jacob Erlbeck | b3100e1 | 2015-12-14 13:36:13 +0100 | [diff] [blame] | 275 | /* Get/Handle TLLI */ |
| 276 | if (rdbi->ti) { |
| 277 | num_chunks = Decoding::rlc_data_from_ul_data( |
| 278 | rdbi, rlc->cs, rlc_data, NULL, 0, &new_tlli); |
| 279 | |
| 280 | if (num_chunks < 0) { |
| 281 | bts->decode_error(); |
| 282 | LOGP(DRLCMACUL, LOGL_NOTICE, |
| 283 | "Failed to decode TLLI of %s UL DATA " |
| 284 | "TFI=%d.\n", rlc->cs.name(), rlc->tfi); |
| 285 | m_window.invalidate_bsn(rdbi->bsn); |
| 286 | continue; |
| 287 | } |
| 288 | if (!this->is_tlli_valid()) { |
| 289 | if (!new_tlli) { |
| 290 | LOGP(DRLCMACUL, LOGL_NOTICE, |
| 291 | "%s: TLLI = 0 within UL DATA.\n", |
| 292 | name()); |
| 293 | m_window.invalidate_bsn(rdbi->bsn); |
| 294 | continue; |
| 295 | } |
| 296 | LOGP(DRLCMACUL, LOGL_INFO, |
| 297 | "Decoded premier TLLI=0x%08x of " |
| 298 | "UL DATA TFI=%d.\n", tlli(), rlc->tfi); |
| 299 | set_tlli_from_ul(new_tlli); |
| 300 | } else if (new_tlli && new_tlli != tlli()) { |
| 301 | LOGP(DRLCMACUL, LOGL_NOTICE, "TLLI mismatch on UL " |
| 302 | "DATA TFI=%d. (Ignoring due to contention " |
| 303 | "resolution)\n", rlc->tfi); |
| 304 | m_window.invalidate_bsn(rdbi->bsn); |
| 305 | continue; |
| 306 | } |
| 307 | } |
| 308 | |
| 309 | m_window.receive_bsn(rdbi->bsn); |
| 310 | } |
| 311 | |
| 312 | /* Raise V(Q) if possible, and retrieve LLC frames from blocks. |
| 313 | * This is looped until there is a gap (non received block) or |
| 314 | * the window is empty.*/ |
| 315 | const uint16_t v_q_beg = m_window.v_q(); |
| 316 | const uint16_t count = m_window.raise_v_q(); |
| 317 | |
| 318 | /* Retrieve LLC frames from blocks that are ready */ |
| 319 | for (uint16_t i = 0; i < count; ++i) { |
Jacob Erlbeck | 93c55d0 | 2015-12-23 16:29:07 +0100 | [diff] [blame] | 320 | uint16_t index = m_window.mod_sns(v_q_beg + i); |
Jacob Erlbeck | b3100e1 | 2015-12-14 13:36:13 +0100 | [diff] [blame] | 321 | assemble_forward_llc(m_rlc.block(index)); |
| 322 | } |
| 323 | |
| 324 | /* Check CV of last frame in buffer */ |
| 325 | if (this->state_is(GPRS_RLCMAC_FLOW) /* still in flow state */ |
| 326 | && this->m_window.v_q() == this->m_window.v_r()) { /* if complete */ |
| 327 | struct gprs_rlc_data *block = |
Jacob Erlbeck | 93c55d0 | 2015-12-23 16:29:07 +0100 | [diff] [blame] | 328 | m_rlc.block(m_window.mod_sns(m_window.v_r() - 1)); |
Jacob Erlbeck | f2ba4cb | 2016-01-07 18:59:28 +0100 | [diff] [blame] | 329 | const struct gprs_rlc_data_block_info *rdbi = |
Jacob Erlbeck | b3100e1 | 2015-12-14 13:36:13 +0100 | [diff] [blame] | 330 | &block->block_info; |
| 331 | |
| 332 | LOGP(DRLCMACUL, LOGL_DEBUG, "- No gaps in received block, " |
| 333 | "last block: BSN=%d CV=%d\n", rdbi->bsn, |
| 334 | rdbi->cv); |
| 335 | if (rdbi->cv == 0) { |
| 336 | LOGP(DRLCMACUL, LOGL_DEBUG, "- Finished with UL " |
| 337 | "TBF\n"); |
| 338 | set_state(GPRS_RLCMAC_FINISHED); |
| 339 | /* Reset N3103 counter. */ |
| 340 | this->m_n3103 = 0; |
| 341 | } |
| 342 | } |
| 343 | |
| 344 | /* If TLLI is included or if we received half of the window, we send |
| 345 | * an ack/nack */ |
| 346 | maybe_schedule_uplink_acknack(rlc); |
| 347 | |
| 348 | return 0; |
| 349 | } |
| 350 | |
Jacob Erlbeck | b3100e1 | 2015-12-14 13:36:13 +0100 | [diff] [blame] | 351 | void gprs_rlcmac_ul_tbf::maybe_schedule_uplink_acknack( |
Jacob Erlbeck | f2ba4cb | 2016-01-07 18:59:28 +0100 | [diff] [blame] | 352 | const gprs_rlc_data_info *rlc) |
Jacob Erlbeck | b3100e1 | 2015-12-14 13:36:13 +0100 | [diff] [blame] | 353 | { |
| 354 | bool have_ti = rlc->block_info[0].ti || |
| 355 | (rlc->num_data_blocks > 1 && rlc->block_info[1].ti); |
| 356 | |
| 357 | if (rlc->si || have_ti || state_is(GPRS_RLCMAC_FINISHED) || |
| 358 | (m_rx_counter % SEND_ACK_AFTER_FRAMES) == 0) |
| 359 | { |
| 360 | if (rlc->si) { |
| 361 | LOGP(DRLCMACUL, LOGL_NOTICE, "- Scheduling Ack/Nack, " |
| 362 | "because MS is stalled.\n"); |
| 363 | } |
| 364 | if (have_ti) { |
| 365 | LOGP(DRLCMACUL, LOGL_DEBUG, "- Scheduling Ack/Nack, " |
| 366 | "because TLLI is included.\n"); |
| 367 | } |
| 368 | if (state_is(GPRS_RLCMAC_FINISHED)) { |
| 369 | LOGP(DRLCMACUL, LOGL_DEBUG, "- Scheduling Ack/Nack, " |
| 370 | "because last block has CV==0.\n"); |
| 371 | } |
| 372 | if ((m_rx_counter % SEND_ACK_AFTER_FRAMES) == 0) { |
| 373 | LOGP(DRLCMACUL, LOGL_DEBUG, "- Scheduling Ack/Nack, " |
| 374 | "because %d frames received.\n", |
| 375 | SEND_ACK_AFTER_FRAMES); |
| 376 | } |
| 377 | if (ul_ack_state == GPRS_RLCMAC_UL_ACK_NONE) { |
| 378 | /* trigger sending at next RTS */ |
| 379 | ul_ack_state = GPRS_RLCMAC_UL_ACK_SEND_ACK; |
| 380 | } else { |
| 381 | /* already triggered */ |
| 382 | LOGP(DRLCMACUL, LOGL_DEBUG, "- Sending Ack/Nack is " |
| 383 | "already triggered, don't schedule!\n"); |
| 384 | } |
| 385 | } |
| 386 | } |
| 387 | |
Daniel Willmann | ca102af | 2014-08-08 12:14:12 +0200 | [diff] [blame] | 388 | /* Send Uplink unit-data to SGSN. */ |
| 389 | int gprs_rlcmac_ul_tbf::snd_ul_ud() |
| 390 | { |
| 391 | uint8_t qos_profile[3]; |
| 392 | struct msgb *llc_pdu; |
| 393 | unsigned msg_len = NS_HDR_LEN + BSSGP_HDR_LEN + m_llc.frame_length(); |
| 394 | struct bssgp_bvc_ctx *bctx = gprs_bssgp_pcu_current_bctx(); |
| 395 | |
| 396 | LOGP(DBSSGP, LOGL_INFO, "LLC [PCU -> SGSN] %s len=%d\n", tbf_name(this), m_llc.frame_length()); |
| 397 | if (!bctx) { |
| 398 | LOGP(DBSSGP, LOGL_ERROR, "No bctx\n"); |
| 399 | m_llc.reset_frame_space(); |
| 400 | return -EIO; |
| 401 | } |
| 402 | |
| 403 | llc_pdu = msgb_alloc_headroom(msg_len, msg_len,"llc_pdu"); |
| 404 | uint8_t *buf = msgb_push(llc_pdu, TL16V_GROSS_LEN(sizeof(uint8_t)*m_llc.frame_length())); |
| 405 | tl16v_put(buf, BSSGP_IE_LLC_PDU, sizeof(uint8_t)*m_llc.frame_length(), m_llc.frame); |
| 406 | qos_profile[0] = QOS_PROFILE >> 16; |
| 407 | qos_profile[1] = QOS_PROFILE >> 8; |
| 408 | qos_profile[2] = QOS_PROFILE; |
| 409 | bssgp_tx_ul_ud(bctx, tlli(), qos_profile, llc_pdu); |
| 410 | |
| 411 | m_llc.reset_frame_space(); |
| 412 | return 0; |
| 413 | } |
| 414 | |
Aravind Sirsikar | 505a86d | 2016-07-26 18:26:21 +0530 | [diff] [blame] | 415 | egprs_rlc_ul_reseg_bsn_state gprs_rlcmac_ul_tbf::handle_egprs_ul_second_seg( |
| 416 | const struct gprs_rlc_data_info *rlc, struct gprs_rlc_data *block, |
| 417 | uint8_t *data, const uint8_t block_idx) |
| 418 | { |
| 419 | const gprs_rlc_data_block_info *rdbi = &rlc->block_info[block_idx]; |
| 420 | union split_block_status *spb_status = &block->spb_status; |
| 421 | uint8_t *rlc_data = &block->block[0]; |
| 422 | |
sivasankari | da7250a | 2016-12-16 12:57:18 +0530 | [diff] [blame] | 423 | bts->spb_uplink_second_segment(); |
| 424 | |
Aravind Sirsikar | 505a86d | 2016-07-26 18:26:21 +0530 | [diff] [blame] | 425 | if (spb_status->block_status_ul & |
| 426 | EGPRS_RESEG_FIRST_SEG_RXD) { |
| 427 | LOGP(DRLCMACUL, LOGL_DEBUG, |
| 428 | "---%s: Second seg is received " |
| 429 | "first seg is already present " |
| 430 | "set the status to complete\n", name()); |
| 431 | spb_status->block_status_ul = EGPRS_RESEG_DEFAULT; |
| 432 | |
| 433 | block->len += Decoding::rlc_copy_to_aligned_buffer(rlc, |
| 434 | block_idx, data, rlc_data + block->len); |
| 435 | block->block_info.data_len += rdbi->data_len; |
| 436 | } else if (spb_status->block_status_ul == EGPRS_RESEG_DEFAULT) { |
| 437 | LOGP(DRLCMACUL, LOGL_DEBUG, |
| 438 | "---%s: Second seg is received " |
| 439 | "first seg is not received " |
| 440 | "set the status to second seg received\n", |
| 441 | name()); |
| 442 | |
| 443 | block->len = Decoding::rlc_copy_to_aligned_buffer(rlc, |
| 444 | block_idx, data, |
| 445 | rlc_data + rlc->block_info[block_idx].data_len); |
| 446 | |
| 447 | spb_status->block_status_ul = EGPRS_RESEG_SECOND_SEG_RXD; |
| 448 | block->block_info = *rdbi; |
| 449 | } |
| 450 | return spb_status->block_status_ul; |
| 451 | } |
| 452 | |
| 453 | egprs_rlc_ul_reseg_bsn_state gprs_rlcmac_ul_tbf::handle_egprs_ul_first_seg( |
| 454 | const struct gprs_rlc_data_info *rlc, struct gprs_rlc_data *block, |
| 455 | uint8_t *data, const uint8_t block_idx) |
| 456 | { |
| 457 | const gprs_rlc_data_block_info *rdbi = &rlc->block_info[block_idx]; |
| 458 | uint8_t *rlc_data = &block->block[0]; |
| 459 | union split_block_status *spb_status = &block->spb_status; |
| 460 | |
sivasankari | da7250a | 2016-12-16 12:57:18 +0530 | [diff] [blame] | 461 | bts->spb_uplink_first_segment(); |
| 462 | |
Aravind Sirsikar | 505a86d | 2016-07-26 18:26:21 +0530 | [diff] [blame] | 463 | if (spb_status->block_status_ul & EGPRS_RESEG_SECOND_SEG_RXD) { |
| 464 | LOGP(DRLCMACUL, LOGL_DEBUG, |
| 465 | "---%s: First seg is received " |
| 466 | "second seg is already present " |
| 467 | "set the status to complete\n", name()); |
| 468 | |
| 469 | block->len += Decoding::rlc_copy_to_aligned_buffer(rlc, |
| 470 | block_idx, data, rlc_data); |
| 471 | |
| 472 | block->block_info.data_len = block->len; |
| 473 | spb_status->block_status_ul = EGPRS_RESEG_DEFAULT; |
| 474 | } else if (spb_status->block_status_ul == EGPRS_RESEG_DEFAULT) { |
| 475 | LOGP(DRLCMACUL, LOGL_DEBUG, |
| 476 | "---%s: First seg is received " |
| 477 | "second seg is not received " |
| 478 | "set the status to first seg " |
| 479 | "received\n", name()); |
| 480 | |
| 481 | spb_status->block_status_ul = EGPRS_RESEG_FIRST_SEG_RXD; |
| 482 | block->len = Decoding::rlc_copy_to_aligned_buffer(rlc, |
| 483 | block_idx, data, rlc_data); |
| 484 | block->block_info = *rdbi; |
| 485 | } |
| 486 | return spb_status->block_status_ul; |
| 487 | } |
| 488 | |
| 489 | egprs_rlc_ul_reseg_bsn_state gprs_rlcmac_ul_tbf::handle_egprs_ul_spb( |
| 490 | const struct gprs_rlc_data_info *rlc, struct gprs_rlc_data *block, |
| 491 | uint8_t *data, const uint8_t block_idx) |
| 492 | { |
| 493 | const gprs_rlc_data_block_info *rdbi = &rlc->block_info[block_idx]; |
| 494 | |
| 495 | LOGP(DRLCMACUL, LOGL_DEBUG, |
| 496 | "--%s: Got SPB(%d) " |
| 497 | "cs(%s) data block with BSN (%d), " |
| 498 | "TFI(%d).\n", name(), rdbi->spb, rlc->cs.name(), rdbi->bsn, |
| 499 | rlc->tfi); |
| 500 | |
| 501 | egprs_rlc_ul_reseg_bsn_state assemble_status = EGPRS_RESEG_INVALID; |
| 502 | |
| 503 | /* Section 10.4.8b of 44.060*/ |
| 504 | if (rdbi->spb == 2) |
| 505 | assemble_status = handle_egprs_ul_first_seg(rlc, |
| 506 | block, data, block_idx); |
| 507 | else if (rdbi->spb == 3) |
| 508 | assemble_status = handle_egprs_ul_second_seg(rlc, |
| 509 | block, data, block_idx); |
| 510 | else { |
| 511 | LOGP(DRLCMACUL, LOGL_ERROR, |
| 512 | "--%s: spb(%d) Not supported SPB for this EGPRS " |
| 513 | "configuration\n", |
| 514 | name(), rdbi->spb); |
| 515 | } |
| 516 | |
| 517 | /* |
| 518 | * When the block is successfully constructed out of segmented blocks |
| 519 | * upgrade the MCS to the type 2 |
| 520 | */ |
| 521 | if (assemble_status == EGPRS_RESEG_DEFAULT) { |
| 522 | switch (GprsCodingScheme::Scheme(rlc->cs)) { |
| 523 | case GprsCodingScheme::MCS3 : |
| 524 | block->cs_last = GprsCodingScheme::MCS6; |
| 525 | LOGP(DRLCMACUL, LOGL_DEBUG, |
| 526 | "--%s: Upgrading to MCS6\n", name()); |
| 527 | break; |
| 528 | case GprsCodingScheme::MCS2 : |
| 529 | block->cs_last = GprsCodingScheme::MCS5; |
| 530 | LOGP(DRLCMACUL, LOGL_DEBUG, |
| 531 | "--%s: Upgrading to MCS5\n", name()); |
| 532 | break; |
| 533 | case GprsCodingScheme::MCS1 : |
| 534 | LOGP(DRLCMACUL, LOGL_DEBUG, |
| 535 | "--%s: Upgrading to MCS4\n", name()); |
| 536 | block->cs_last = GprsCodingScheme::MCS4; |
| 537 | break; |
| 538 | default: |
| 539 | LOGP(DRLCMACUL, LOGL_ERROR, |
| 540 | "--%s: cs(%s) Error in Upgrading to higher MCS\n", |
| 541 | name(), rlc->cs.name()); |
| 542 | break; |
| 543 | } |
| 544 | } |
| 545 | return assemble_status; |
| 546 | } |
Mrinal Mishra | f86307e | 2016-11-10 18:16:30 +0530 | [diff] [blame] | 547 | |
| 548 | void gprs_rlcmac_ul_tbf::update_coding_scheme_counter_ul(const GprsCodingScheme cs) |
| 549 | { |
| 550 | uint8_t coding_scheme = 0; |
| 551 | |
| 552 | coding_scheme = GprsCodingScheme::Scheme(cs); |
| 553 | if (cs.isGprs()) { |
| 554 | switch (coding_scheme) { |
| 555 | case GprsCodingScheme::CS1 : |
| 556 | bts->gprs_ul_cs1(); |
sivasankari | da7250a | 2016-12-16 12:57:18 +0530 | [diff] [blame] | 557 | rate_ctr_inc(&m_ul_gprs_ctrs->ctr[TBF_CTR_GPRS_UL_CS1]); |
Mrinal Mishra | f86307e | 2016-11-10 18:16:30 +0530 | [diff] [blame] | 558 | break; |
| 559 | case GprsCodingScheme::CS2 : |
| 560 | bts->gprs_ul_cs2(); |
sivasankari | da7250a | 2016-12-16 12:57:18 +0530 | [diff] [blame] | 561 | rate_ctr_inc(&m_ul_gprs_ctrs->ctr[TBF_CTR_GPRS_UL_CS2]); |
Mrinal Mishra | f86307e | 2016-11-10 18:16:30 +0530 | [diff] [blame] | 562 | break; |
| 563 | case GprsCodingScheme::CS3 : |
| 564 | bts->gprs_ul_cs3(); |
sivasankari | da7250a | 2016-12-16 12:57:18 +0530 | [diff] [blame] | 565 | rate_ctr_inc(&m_ul_gprs_ctrs->ctr[TBF_CTR_GPRS_UL_CS3]); |
Mrinal Mishra | f86307e | 2016-11-10 18:16:30 +0530 | [diff] [blame] | 566 | break; |
| 567 | case GprsCodingScheme::CS4 : |
| 568 | bts->gprs_ul_cs4(); |
sivasankari | da7250a | 2016-12-16 12:57:18 +0530 | [diff] [blame] | 569 | rate_ctr_inc(&m_ul_gprs_ctrs->ctr[TBF_CTR_GPRS_UL_CS4]); |
Mrinal Mishra | f86307e | 2016-11-10 18:16:30 +0530 | [diff] [blame] | 570 | break; |
| 571 | } |
| 572 | } else { |
| 573 | switch (coding_scheme) { |
| 574 | case GprsCodingScheme::MCS1 : |
| 575 | bts->egprs_ul_mcs1(); |
sivasankari | da7250a | 2016-12-16 12:57:18 +0530 | [diff] [blame] | 576 | rate_ctr_inc(&m_ul_egprs_ctrs->ctr[TBF_CTR_EGPRS_UL_MCS1]); |
Mrinal Mishra | f86307e | 2016-11-10 18:16:30 +0530 | [diff] [blame] | 577 | break; |
| 578 | case GprsCodingScheme::MCS2 : |
| 579 | bts->egprs_ul_mcs2(); |
sivasankari | da7250a | 2016-12-16 12:57:18 +0530 | [diff] [blame] | 580 | rate_ctr_inc(&m_ul_egprs_ctrs->ctr[TBF_CTR_EGPRS_UL_MCS2]); |
Mrinal Mishra | f86307e | 2016-11-10 18:16:30 +0530 | [diff] [blame] | 581 | break; |
| 582 | case GprsCodingScheme::MCS3 : |
| 583 | bts->egprs_ul_mcs3(); |
sivasankari | da7250a | 2016-12-16 12:57:18 +0530 | [diff] [blame] | 584 | rate_ctr_inc(&m_ul_egprs_ctrs->ctr[TBF_CTR_EGPRS_UL_MCS3]); |
Mrinal Mishra | f86307e | 2016-11-10 18:16:30 +0530 | [diff] [blame] | 585 | break; |
| 586 | case GprsCodingScheme::MCS4 : |
| 587 | bts->egprs_ul_mcs4(); |
sivasankari | da7250a | 2016-12-16 12:57:18 +0530 | [diff] [blame] | 588 | rate_ctr_inc(&m_ul_egprs_ctrs->ctr[TBF_CTR_EGPRS_UL_MCS4]); |
Mrinal Mishra | f86307e | 2016-11-10 18:16:30 +0530 | [diff] [blame] | 589 | break; |
| 590 | case GprsCodingScheme::MCS5 : |
| 591 | bts->egprs_ul_mcs5(); |
sivasankari | da7250a | 2016-12-16 12:57:18 +0530 | [diff] [blame] | 592 | rate_ctr_inc(&m_ul_egprs_ctrs->ctr[TBF_CTR_EGPRS_UL_MCS5]); |
Mrinal Mishra | f86307e | 2016-11-10 18:16:30 +0530 | [diff] [blame] | 593 | break; |
| 594 | case GprsCodingScheme::MCS6 : |
| 595 | bts->egprs_ul_mcs6(); |
sivasankari | da7250a | 2016-12-16 12:57:18 +0530 | [diff] [blame] | 596 | rate_ctr_inc(&m_ul_egprs_ctrs->ctr[TBF_CTR_EGPRS_UL_MCS6]); |
Mrinal Mishra | f86307e | 2016-11-10 18:16:30 +0530 | [diff] [blame] | 597 | break; |
| 598 | case GprsCodingScheme::MCS7 : |
| 599 | bts->egprs_ul_mcs7(); |
sivasankari | da7250a | 2016-12-16 12:57:18 +0530 | [diff] [blame] | 600 | rate_ctr_inc(&m_ul_egprs_ctrs->ctr[TBF_CTR_EGPRS_UL_MCS7]); |
Mrinal Mishra | f86307e | 2016-11-10 18:16:30 +0530 | [diff] [blame] | 601 | break; |
| 602 | case GprsCodingScheme::MCS8 : |
| 603 | bts->egprs_ul_mcs8(); |
sivasankari | da7250a | 2016-12-16 12:57:18 +0530 | [diff] [blame] | 604 | rate_ctr_inc(&m_ul_egprs_ctrs->ctr[TBF_CTR_EGPRS_UL_MCS8]); |
Mrinal Mishra | f86307e | 2016-11-10 18:16:30 +0530 | [diff] [blame] | 605 | break; |
| 606 | case GprsCodingScheme::MCS9 : |
| 607 | bts->egprs_ul_mcs9(); |
sivasankari | da7250a | 2016-12-16 12:57:18 +0530 | [diff] [blame] | 608 | rate_ctr_inc(&m_ul_egprs_ctrs->ctr[TBF_CTR_EGPRS_UL_MCS9]); |
Mrinal Mishra | f86307e | 2016-11-10 18:16:30 +0530 | [diff] [blame] | 609 | break; |
| 610 | } |
| 611 | } |
| 612 | } |
sivasankari | 8adfcd0 | 2017-01-16 15:41:21 +0530 | [diff] [blame] | 613 | |
| 614 | void gprs_rlcmac_ul_tbf::egprs_calc_ulwindow_size() |
| 615 | { |
| 616 | struct gprs_rlcmac_bts *bts_data = bts->bts_data(); |
| 617 | unsigned int num_pdch = pcu_bitcount(ul_slots()); |
| 618 | unsigned int ws = bts_data->ws_base + num_pdch * bts_data->ws_pdch; |
| 619 | ws = (ws / 32) * 32; |
| 620 | ws = OSMO_MAX(64, ws); |
| 621 | |
| 622 | if (num_pdch == 1) |
| 623 | ws = OSMO_MIN(192, ws); |
| 624 | else |
| 625 | ws = OSMO_MIN(128 * num_pdch, ws); |
| 626 | |
| 627 | LOGP(DRLCMAC, LOGL_INFO, "%s: Setting EGPRS window size to %d, base(%d) slots(%d) ws_pdch(%d)\n", |
| 628 | name(), ws, bts_data->ws_base, num_pdch, bts_data->ws_pdch); |
| 629 | |
| 630 | m_window.set_ws(ws); |
| 631 | } |