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 | |
| 32 | extern "C" { |
| 33 | #include <osmocom/core/msgb.h> |
| 34 | #include <osmocom/core/talloc.h> |
| 35 | } |
| 36 | |
| 37 | #include <errno.h> |
| 38 | #include <string.h> |
| 39 | |
| 40 | /* After receiving these frames, we send ack/nack. */ |
| 41 | #define SEND_ACK_AFTER_FRAMES 20 |
| 42 | |
| 43 | extern void *tall_pcu_ctx; |
| 44 | |
Jacob Erlbeck | b3100e1 | 2015-12-14 13:36:13 +0100 | [diff] [blame] | 45 | /* |
| 46 | * Store received block data in LLC message(s) and forward to SGSN |
| 47 | * if complete. |
| 48 | */ |
| 49 | int gprs_rlcmac_ul_tbf::assemble_forward_llc(const gprs_rlc_data *_data) |
| 50 | { |
| 51 | const uint8_t *data = _data->block; |
| 52 | uint8_t len = _data->len; |
Jacob Erlbeck | f2ba4cb | 2016-01-07 18:59:28 +0100 | [diff] [blame] | 53 | const struct gprs_rlc_data_block_info *rdbi = &_data->block_info; |
Aravind Sirsikar | 9149552 | 2016-07-12 14:17:12 +0530 | [diff] [blame] | 54 | GprsCodingScheme cs = _data->cs_last; |
Jacob Erlbeck | b3100e1 | 2015-12-14 13:36:13 +0100 | [diff] [blame] | 55 | |
| 56 | Decoding::RlcData frames[16], *frame; |
| 57 | int i, num_frames = 0; |
| 58 | uint32_t dummy_tlli; |
| 59 | |
| 60 | LOGP(DRLCMACUL, LOGL_DEBUG, "- Assembling frames: (len=%d)\n", len); |
| 61 | |
| 62 | num_frames = Decoding::rlc_data_from_ul_data( |
Alexander Couzens | ce936f3 | 2016-05-24 14:45:41 +0200 | [diff] [blame] | 63 | rdbi, cs, data, &(frames[0]), ARRAY_SIZE(frames), |
Jacob Erlbeck | b3100e1 | 2015-12-14 13:36:13 +0100 | [diff] [blame] | 64 | &dummy_tlli); |
| 65 | |
| 66 | /* create LLC frames */ |
| 67 | for (i = 0; i < num_frames; i++) { |
| 68 | frame = frames + i; |
| 69 | |
Alexander Couzens | 7fdbf89 | 2016-05-21 19:45:23 +0200 | [diff] [blame] | 70 | bts->rlc_ul_payload_bytes(frame->length); |
| 71 | |
Jacob Erlbeck | b3100e1 | 2015-12-14 13:36:13 +0100 | [diff] [blame] | 72 | LOGP(DRLCMACUL, LOGL_DEBUG, "-- Frame %d starts at offset %d, " |
| 73 | "length=%d, is_complete=%d\n", |
| 74 | i + 1, frame->offset, frame->length, frame->is_complete); |
| 75 | |
| 76 | m_llc.append_frame(data + frame->offset, frame->length); |
| 77 | m_llc.consume(frame->length); |
| 78 | |
| 79 | if (frame->is_complete) { |
| 80 | /* send frame to SGSN */ |
| 81 | LOGP(DRLCMACUL, LOGL_INFO, "%s complete UL frame len=%d\n", |
| 82 | tbf_name(this) , m_llc.frame_length()); |
| 83 | snd_ul_ud(); |
Alexander Couzens | 7fdbf89 | 2016-05-21 19:45:23 +0200 | [diff] [blame] | 84 | bts->llc_ul_bytes(m_llc.frame_length()); |
Jacob Erlbeck | b3100e1 | 2015-12-14 13:36:13 +0100 | [diff] [blame] | 85 | m_llc.reset(); |
| 86 | } |
| 87 | } |
| 88 | |
| 89 | return 0; |
| 90 | } |
| 91 | |
Daniel Willmann | ca102af | 2014-08-08 12:14:12 +0200 | [diff] [blame] | 92 | |
Jacob Erlbeck | 5a3c84d | 2016-01-22 17:25:38 +0100 | [diff] [blame] | 93 | 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] | 94 | { |
| 95 | int final = (state_is(GPRS_RLCMAC_FINISHED)); |
| 96 | struct msgb *msg; |
Jacob Erlbeck | f2694b7 | 2016-01-26 21:46:26 +0100 | [diff] [blame] | 97 | int rc; |
| 98 | unsigned int rrbp = 0; |
| 99 | uint32_t new_poll_fn = 0; |
Daniel Willmann | ca102af | 2014-08-08 12:14:12 +0200 | [diff] [blame] | 100 | |
| 101 | if (final) { |
Jacob Erlbeck | f2694b7 | 2016-01-26 21:46:26 +0100 | [diff] [blame] | 102 | if (poll_state == GPRS_RLCMAC_POLL_SCHED && |
| 103 | ul_ack_state == GPRS_RLCMAC_UL_ACK_WAIT_ACK) { |
Daniel Willmann | ca102af | 2014-08-08 12:14:12 +0200 | [diff] [blame] | 104 | LOGP(DRLCMACUL, LOGL_DEBUG, "Polling is already " |
Jacob Erlbeck | f2694b7 | 2016-01-26 21:46:26 +0100 | [diff] [blame] | 105 | "scheduled for %s, so we must wait for " |
| 106 | "the final uplink ack...\n", tbf_name(this)); |
Daniel Willmann | ca102af | 2014-08-08 12:14:12 +0200 | [diff] [blame] | 107 | return NULL; |
| 108 | } |
Jacob Erlbeck | f2694b7 | 2016-01-26 21:46:26 +0100 | [diff] [blame] | 109 | |
| 110 | rc = check_polling(fn, ts, &new_poll_fn, &rrbp); |
| 111 | if (rc < 0) |
Daniel Willmann | ca102af | 2014-08-08 12:14:12 +0200 | [diff] [blame] | 112 | return NULL; |
Daniel Willmann | ca102af | 2014-08-08 12:14:12 +0200 | [diff] [blame] | 113 | } |
| 114 | |
| 115 | msg = msgb_alloc(23, "rlcmac_ul_ack"); |
| 116 | if (!msg) |
| 117 | return NULL; |
| 118 | bitvec *ack_vec = bitvec_alloc(23); |
| 119 | if (!ack_vec) { |
| 120 | msgb_free(msg); |
| 121 | return NULL; |
| 122 | } |
| 123 | bitvec_unhex(ack_vec, |
| 124 | "2b2b2b2b2b2b2b2b2b2b2b2b2b2b2b2b2b2b2b2b2b2b2b"); |
Jacob Erlbeck | f2694b7 | 2016-01-26 21:46:26 +0100 | [diff] [blame] | 125 | Encoding::write_packet_uplink_ack(bts_data(), ack_vec, this, final, rrbp); |
Daniel Willmann | ca102af | 2014-08-08 12:14:12 +0200 | [diff] [blame] | 126 | bitvec_pack(ack_vec, msgb_put(msg, 23)); |
| 127 | bitvec_free(ack_vec); |
Daniel Willmann | ca102af | 2014-08-08 12:14:12 +0200 | [diff] [blame] | 128 | |
| 129 | /* now we must set this flag, so we are allowed to assign downlink |
| 130 | * TBF on PACCH. it is only allowed when TLLI is acknowledged. */ |
| 131 | m_contention_resolution_done = 1; |
| 132 | |
| 133 | if (final) { |
Jacob Erlbeck | f2694b7 | 2016-01-26 21:46:26 +0100 | [diff] [blame] | 134 | set_polling(new_poll_fn, ts); |
Daniel Willmann | ca102af | 2014-08-08 12:14:12 +0200 | [diff] [blame] | 135 | /* waiting for final acknowledge */ |
| 136 | ul_ack_state = GPRS_RLCMAC_UL_ACK_WAIT_ACK; |
| 137 | m_final_ack_sent = 1; |
| 138 | } else |
| 139 | ul_ack_state = GPRS_RLCMAC_UL_ACK_NONE; |
| 140 | |
| 141 | return msg; |
| 142 | } |
| 143 | |
Alexander Couzens | 2fcfc29 | 2016-05-24 14:40:03 +0200 | [diff] [blame] | 144 | /*! \brief receive data from PDCH/L1 */ |
Jacob Erlbeck | b3100e1 | 2015-12-14 13:36:13 +0100 | [diff] [blame] | 145 | int gprs_rlcmac_ul_tbf::rcv_data_block_acknowledged( |
Jacob Erlbeck | f2ba4cb | 2016-01-07 18:59:28 +0100 | [diff] [blame] | 146 | const struct gprs_rlc_data_info *rlc, |
Jacob Erlbeck | fc1b3e6 | 2016-01-11 09:58:11 +0100 | [diff] [blame] | 147 | uint8_t *data, struct pcu_l1_meas *meas) |
Jacob Erlbeck | b3100e1 | 2015-12-14 13:36:13 +0100 | [diff] [blame] | 148 | { |
| 149 | int8_t rssi = meas->have_rssi ? meas->rssi : 0; |
| 150 | |
Jacob Erlbeck | b3100e1 | 2015-12-14 13:36:13 +0100 | [diff] [blame] | 151 | const uint16_t ws = m_window.ws(); |
| 152 | |
| 153 | this->state_flags |= (1 << GPRS_RLCMAC_FLAG_UL_DATA); |
| 154 | |
| 155 | LOGP(DRLCMACUL, LOGL_DEBUG, "UL DATA TFI=%d received (V(Q)=%d .. " |
| 156 | "V(R)=%d)\n", rlc->tfi, this->m_window.v_q(), |
| 157 | this->m_window.v_r()); |
| 158 | |
| 159 | /* process RSSI */ |
| 160 | gprs_rlcmac_rssi(this, rssi); |
| 161 | |
| 162 | /* store measurement values */ |
| 163 | if (ms()) |
| 164 | ms()->update_l1_meas(meas); |
| 165 | |
| 166 | uint32_t new_tlli = 0; |
| 167 | unsigned int block_idx; |
| 168 | |
| 169 | /* restart T3169 */ |
| 170 | tbf_timer_start(this, 3169, bts_data()->t3169, 0); |
| 171 | |
| 172 | /* Increment RX-counter */ |
| 173 | this->m_rx_counter++; |
| 174 | |
| 175 | /* Loop over num_blocks */ |
| 176 | for (block_idx = 0; block_idx < rlc->num_data_blocks; block_idx++) { |
| 177 | int num_chunks; |
| 178 | uint8_t *rlc_data; |
Jacob Erlbeck | f2ba4cb | 2016-01-07 18:59:28 +0100 | [diff] [blame] | 179 | const struct gprs_rlc_data_block_info *rdbi = |
Jacob Erlbeck | b3100e1 | 2015-12-14 13:36:13 +0100 | [diff] [blame] | 180 | &rlc->block_info[block_idx]; |
| 181 | bool need_rlc_data = false; |
| 182 | struct gprs_rlc_data *block; |
| 183 | |
| 184 | LOGP(DRLCMACUL, LOGL_DEBUG, |
| 185 | "%s: Got %s RLC data block: " |
| 186 | "CV=%d, BSN=%d, SPB=%d, " |
| 187 | "PI=%d, E=%d, TI=%d, bitoffs=%d\n", |
| 188 | name(), rlc->cs.name(), |
| 189 | rdbi->cv, rdbi->bsn, rdbi->spb, |
| 190 | rdbi->pi, rdbi->e, rdbi->ti, |
| 191 | rlc->data_offs_bits[block_idx]); |
| 192 | |
| 193 | /* Check whether the block needs to be decoded */ |
| 194 | |
| 195 | if (!m_window.is_in_window(rdbi->bsn)) { |
| 196 | LOGP(DRLCMACUL, LOGL_DEBUG, "- BSN %d out of window " |
| 197 | "%d..%d (it's normal)\n", rdbi->bsn, |
| 198 | m_window.v_q(), |
Jacob Erlbeck | 93c55d0 | 2015-12-23 16:29:07 +0100 | [diff] [blame] | 199 | m_window.mod_sns(m_window.v_q() + ws - 1)); |
Jacob Erlbeck | b3100e1 | 2015-12-14 13:36:13 +0100 | [diff] [blame] | 200 | } else if (m_window.is_received(rdbi->bsn)) { |
| 201 | LOGP(DRLCMACUL, LOGL_DEBUG, |
| 202 | "- BSN %d already received\n", rdbi->bsn); |
| 203 | } else { |
| 204 | need_rlc_data = true; |
| 205 | } |
| 206 | |
| 207 | if (!is_tlli_valid()) { |
| 208 | if (!rdbi->ti) { |
| 209 | LOGP(DRLCMACUL, LOGL_NOTICE, |
| 210 | "%s: Missing TLLI within UL DATA.\n", |
| 211 | name()); |
| 212 | continue; |
| 213 | } |
| 214 | need_rlc_data = true; |
| 215 | } |
| 216 | |
| 217 | if (!need_rlc_data) |
| 218 | continue; |
| 219 | |
| 220 | /* Store block and meta info to BSN buffer */ |
| 221 | |
| 222 | LOGP(DRLCMACUL, LOGL_DEBUG, "- BSN %d storing in window (%d..%d)\n", |
| 223 | rdbi->bsn, m_window.v_q(), |
Jacob Erlbeck | 93c55d0 | 2015-12-23 16:29:07 +0100 | [diff] [blame] | 224 | m_window.mod_sns(m_window.v_q() + ws - 1)); |
Jacob Erlbeck | b3100e1 | 2015-12-14 13:36:13 +0100 | [diff] [blame] | 225 | block = m_rlc.block(rdbi->bsn); |
Aravind Sirsikar | 550a541 | 2016-06-14 18:59:18 +0530 | [diff] [blame] | 226 | OSMO_ASSERT(rdbi->data_len <= sizeof(block->block)); |
Jacob Erlbeck | b3100e1 | 2015-12-14 13:36:13 +0100 | [diff] [blame] | 227 | rlc_data = &(block->block[0]); |
Jacob Erlbeck | b3100e1 | 2015-12-14 13:36:13 +0100 | [diff] [blame] | 228 | |
Aravind Sirsikar | 505a86d | 2016-07-26 18:26:21 +0530 | [diff] [blame] | 229 | if (rdbi->spb) { |
| 230 | egprs_rlc_ul_reseg_bsn_state assemble_status; |
| 231 | |
| 232 | assemble_status = handle_egprs_ul_spb(rlc, |
| 233 | block, data, block_idx); |
| 234 | |
| 235 | if (assemble_status != EGPRS_RESEG_DEFAULT) |
| 236 | return 0; |
| 237 | } else { |
| 238 | block->block_info = *rdbi; |
| 239 | block->cs_last = rlc->cs; |
| 240 | block->len = |
| 241 | Decoding::rlc_copy_to_aligned_buffer(rlc, |
| 242 | block_idx, data, rlc_data); |
| 243 | } |
Jacob Erlbeck | b3100e1 | 2015-12-14 13:36:13 +0100 | [diff] [blame] | 244 | |
Jacob Erlbeck | d88bb2e | 2015-12-11 14:53:29 +0100 | [diff] [blame] | 245 | LOGP(DRLCMACUL, LOGL_DEBUG, |
| 246 | "%s: data_length=%d, data=%s\n", |
| 247 | name(), block->len, osmo_hexdump(rlc_data, block->len)); |
Jacob Erlbeck | b3100e1 | 2015-12-14 13:36:13 +0100 | [diff] [blame] | 248 | /* Get/Handle TLLI */ |
| 249 | if (rdbi->ti) { |
| 250 | num_chunks = Decoding::rlc_data_from_ul_data( |
| 251 | rdbi, rlc->cs, rlc_data, NULL, 0, &new_tlli); |
| 252 | |
| 253 | if (num_chunks < 0) { |
| 254 | bts->decode_error(); |
| 255 | LOGP(DRLCMACUL, LOGL_NOTICE, |
| 256 | "Failed to decode TLLI of %s UL DATA " |
| 257 | "TFI=%d.\n", rlc->cs.name(), rlc->tfi); |
| 258 | m_window.invalidate_bsn(rdbi->bsn); |
| 259 | continue; |
| 260 | } |
| 261 | if (!this->is_tlli_valid()) { |
| 262 | if (!new_tlli) { |
| 263 | LOGP(DRLCMACUL, LOGL_NOTICE, |
| 264 | "%s: TLLI = 0 within UL DATA.\n", |
| 265 | name()); |
| 266 | m_window.invalidate_bsn(rdbi->bsn); |
| 267 | continue; |
| 268 | } |
| 269 | LOGP(DRLCMACUL, LOGL_INFO, |
| 270 | "Decoded premier TLLI=0x%08x of " |
| 271 | "UL DATA TFI=%d.\n", tlli(), rlc->tfi); |
| 272 | set_tlli_from_ul(new_tlli); |
| 273 | } else if (new_tlli && new_tlli != tlli()) { |
| 274 | LOGP(DRLCMACUL, LOGL_NOTICE, "TLLI mismatch on UL " |
| 275 | "DATA TFI=%d. (Ignoring due to contention " |
| 276 | "resolution)\n", rlc->tfi); |
| 277 | m_window.invalidate_bsn(rdbi->bsn); |
| 278 | continue; |
| 279 | } |
| 280 | } |
| 281 | |
| 282 | m_window.receive_bsn(rdbi->bsn); |
| 283 | } |
| 284 | |
| 285 | /* Raise V(Q) if possible, and retrieve LLC frames from blocks. |
| 286 | * This is looped until there is a gap (non received block) or |
| 287 | * the window is empty.*/ |
| 288 | const uint16_t v_q_beg = m_window.v_q(); |
| 289 | const uint16_t count = m_window.raise_v_q(); |
| 290 | |
| 291 | /* Retrieve LLC frames from blocks that are ready */ |
| 292 | for (uint16_t i = 0; i < count; ++i) { |
Jacob Erlbeck | 93c55d0 | 2015-12-23 16:29:07 +0100 | [diff] [blame] | 293 | uint16_t index = m_window.mod_sns(v_q_beg + i); |
Jacob Erlbeck | b3100e1 | 2015-12-14 13:36:13 +0100 | [diff] [blame] | 294 | assemble_forward_llc(m_rlc.block(index)); |
| 295 | } |
| 296 | |
| 297 | /* Check CV of last frame in buffer */ |
| 298 | if (this->state_is(GPRS_RLCMAC_FLOW) /* still in flow state */ |
| 299 | && this->m_window.v_q() == this->m_window.v_r()) { /* if complete */ |
| 300 | struct gprs_rlc_data *block = |
Jacob Erlbeck | 93c55d0 | 2015-12-23 16:29:07 +0100 | [diff] [blame] | 301 | m_rlc.block(m_window.mod_sns(m_window.v_r() - 1)); |
Jacob Erlbeck | f2ba4cb | 2016-01-07 18:59:28 +0100 | [diff] [blame] | 302 | const struct gprs_rlc_data_block_info *rdbi = |
Jacob Erlbeck | b3100e1 | 2015-12-14 13:36:13 +0100 | [diff] [blame] | 303 | &block->block_info; |
| 304 | |
| 305 | LOGP(DRLCMACUL, LOGL_DEBUG, "- No gaps in received block, " |
| 306 | "last block: BSN=%d CV=%d\n", rdbi->bsn, |
| 307 | rdbi->cv); |
| 308 | if (rdbi->cv == 0) { |
| 309 | LOGP(DRLCMACUL, LOGL_DEBUG, "- Finished with UL " |
| 310 | "TBF\n"); |
| 311 | set_state(GPRS_RLCMAC_FINISHED); |
| 312 | /* Reset N3103 counter. */ |
| 313 | this->m_n3103 = 0; |
| 314 | } |
| 315 | } |
| 316 | |
| 317 | /* If TLLI is included or if we received half of the window, we send |
| 318 | * an ack/nack */ |
| 319 | maybe_schedule_uplink_acknack(rlc); |
| 320 | |
| 321 | return 0; |
| 322 | } |
| 323 | |
Jacob Erlbeck | b3100e1 | 2015-12-14 13:36:13 +0100 | [diff] [blame] | 324 | void gprs_rlcmac_ul_tbf::maybe_schedule_uplink_acknack( |
Jacob Erlbeck | f2ba4cb | 2016-01-07 18:59:28 +0100 | [diff] [blame] | 325 | const gprs_rlc_data_info *rlc) |
Jacob Erlbeck | b3100e1 | 2015-12-14 13:36:13 +0100 | [diff] [blame] | 326 | { |
| 327 | bool have_ti = rlc->block_info[0].ti || |
| 328 | (rlc->num_data_blocks > 1 && rlc->block_info[1].ti); |
| 329 | |
| 330 | if (rlc->si || have_ti || state_is(GPRS_RLCMAC_FINISHED) || |
| 331 | (m_rx_counter % SEND_ACK_AFTER_FRAMES) == 0) |
| 332 | { |
| 333 | if (rlc->si) { |
| 334 | LOGP(DRLCMACUL, LOGL_NOTICE, "- Scheduling Ack/Nack, " |
| 335 | "because MS is stalled.\n"); |
| 336 | } |
| 337 | if (have_ti) { |
| 338 | LOGP(DRLCMACUL, LOGL_DEBUG, "- Scheduling Ack/Nack, " |
| 339 | "because TLLI is included.\n"); |
| 340 | } |
| 341 | if (state_is(GPRS_RLCMAC_FINISHED)) { |
| 342 | LOGP(DRLCMACUL, LOGL_DEBUG, "- Scheduling Ack/Nack, " |
| 343 | "because last block has CV==0.\n"); |
| 344 | } |
| 345 | if ((m_rx_counter % SEND_ACK_AFTER_FRAMES) == 0) { |
| 346 | LOGP(DRLCMACUL, LOGL_DEBUG, "- Scheduling Ack/Nack, " |
| 347 | "because %d frames received.\n", |
| 348 | SEND_ACK_AFTER_FRAMES); |
| 349 | } |
| 350 | if (ul_ack_state == GPRS_RLCMAC_UL_ACK_NONE) { |
| 351 | /* trigger sending at next RTS */ |
| 352 | ul_ack_state = GPRS_RLCMAC_UL_ACK_SEND_ACK; |
| 353 | } else { |
| 354 | /* already triggered */ |
| 355 | LOGP(DRLCMACUL, LOGL_DEBUG, "- Sending Ack/Nack is " |
| 356 | "already triggered, don't schedule!\n"); |
| 357 | } |
| 358 | } |
| 359 | } |
| 360 | |
Daniel Willmann | ca102af | 2014-08-08 12:14:12 +0200 | [diff] [blame] | 361 | /* Send Uplink unit-data to SGSN. */ |
| 362 | int gprs_rlcmac_ul_tbf::snd_ul_ud() |
| 363 | { |
| 364 | uint8_t qos_profile[3]; |
| 365 | struct msgb *llc_pdu; |
| 366 | unsigned msg_len = NS_HDR_LEN + BSSGP_HDR_LEN + m_llc.frame_length(); |
| 367 | struct bssgp_bvc_ctx *bctx = gprs_bssgp_pcu_current_bctx(); |
| 368 | |
| 369 | LOGP(DBSSGP, LOGL_INFO, "LLC [PCU -> SGSN] %s len=%d\n", tbf_name(this), m_llc.frame_length()); |
| 370 | if (!bctx) { |
| 371 | LOGP(DBSSGP, LOGL_ERROR, "No bctx\n"); |
| 372 | m_llc.reset_frame_space(); |
| 373 | return -EIO; |
| 374 | } |
| 375 | |
| 376 | llc_pdu = msgb_alloc_headroom(msg_len, msg_len,"llc_pdu"); |
| 377 | uint8_t *buf = msgb_push(llc_pdu, TL16V_GROSS_LEN(sizeof(uint8_t)*m_llc.frame_length())); |
| 378 | tl16v_put(buf, BSSGP_IE_LLC_PDU, sizeof(uint8_t)*m_llc.frame_length(), m_llc.frame); |
| 379 | qos_profile[0] = QOS_PROFILE >> 16; |
| 380 | qos_profile[1] = QOS_PROFILE >> 8; |
| 381 | qos_profile[2] = QOS_PROFILE; |
| 382 | bssgp_tx_ul_ud(bctx, tlli(), qos_profile, llc_pdu); |
| 383 | |
| 384 | m_llc.reset_frame_space(); |
| 385 | return 0; |
| 386 | } |
| 387 | |
Aravind Sirsikar | 505a86d | 2016-07-26 18:26:21 +0530 | [diff] [blame] | 388 | egprs_rlc_ul_reseg_bsn_state gprs_rlcmac_ul_tbf::handle_egprs_ul_second_seg( |
| 389 | const struct gprs_rlc_data_info *rlc, struct gprs_rlc_data *block, |
| 390 | uint8_t *data, const uint8_t block_idx) |
| 391 | { |
| 392 | const gprs_rlc_data_block_info *rdbi = &rlc->block_info[block_idx]; |
| 393 | union split_block_status *spb_status = &block->spb_status; |
| 394 | uint8_t *rlc_data = &block->block[0]; |
| 395 | |
| 396 | if (spb_status->block_status_ul & |
| 397 | EGPRS_RESEG_FIRST_SEG_RXD) { |
| 398 | LOGP(DRLCMACUL, LOGL_DEBUG, |
| 399 | "---%s: Second seg is received " |
| 400 | "first seg is already present " |
| 401 | "set the status to complete\n", name()); |
| 402 | spb_status->block_status_ul = EGPRS_RESEG_DEFAULT; |
| 403 | |
| 404 | block->len += Decoding::rlc_copy_to_aligned_buffer(rlc, |
| 405 | block_idx, data, rlc_data + block->len); |
| 406 | block->block_info.data_len += rdbi->data_len; |
| 407 | } else if (spb_status->block_status_ul == EGPRS_RESEG_DEFAULT) { |
| 408 | LOGP(DRLCMACUL, LOGL_DEBUG, |
| 409 | "---%s: Second seg is received " |
| 410 | "first seg is not received " |
| 411 | "set the status to second seg received\n", |
| 412 | name()); |
| 413 | |
| 414 | block->len = Decoding::rlc_copy_to_aligned_buffer(rlc, |
| 415 | block_idx, data, |
| 416 | rlc_data + rlc->block_info[block_idx].data_len); |
| 417 | |
| 418 | spb_status->block_status_ul = EGPRS_RESEG_SECOND_SEG_RXD; |
| 419 | block->block_info = *rdbi; |
| 420 | } |
| 421 | return spb_status->block_status_ul; |
| 422 | } |
| 423 | |
| 424 | egprs_rlc_ul_reseg_bsn_state gprs_rlcmac_ul_tbf::handle_egprs_ul_first_seg( |
| 425 | const struct gprs_rlc_data_info *rlc, struct gprs_rlc_data *block, |
| 426 | uint8_t *data, const uint8_t block_idx) |
| 427 | { |
| 428 | const gprs_rlc_data_block_info *rdbi = &rlc->block_info[block_idx]; |
| 429 | uint8_t *rlc_data = &block->block[0]; |
| 430 | union split_block_status *spb_status = &block->spb_status; |
| 431 | |
| 432 | if (spb_status->block_status_ul & EGPRS_RESEG_SECOND_SEG_RXD) { |
| 433 | LOGP(DRLCMACUL, LOGL_DEBUG, |
| 434 | "---%s: First seg is received " |
| 435 | "second seg is already present " |
| 436 | "set the status to complete\n", name()); |
| 437 | |
| 438 | block->len += Decoding::rlc_copy_to_aligned_buffer(rlc, |
| 439 | block_idx, data, rlc_data); |
| 440 | |
| 441 | block->block_info.data_len = block->len; |
| 442 | spb_status->block_status_ul = EGPRS_RESEG_DEFAULT; |
| 443 | } else if (spb_status->block_status_ul == EGPRS_RESEG_DEFAULT) { |
| 444 | LOGP(DRLCMACUL, LOGL_DEBUG, |
| 445 | "---%s: First seg is received " |
| 446 | "second seg is not received " |
| 447 | "set the status to first seg " |
| 448 | "received\n", name()); |
| 449 | |
| 450 | spb_status->block_status_ul = EGPRS_RESEG_FIRST_SEG_RXD; |
| 451 | block->len = Decoding::rlc_copy_to_aligned_buffer(rlc, |
| 452 | block_idx, data, rlc_data); |
| 453 | block->block_info = *rdbi; |
| 454 | } |
| 455 | return spb_status->block_status_ul; |
| 456 | } |
| 457 | |
| 458 | egprs_rlc_ul_reseg_bsn_state gprs_rlcmac_ul_tbf::handle_egprs_ul_spb( |
| 459 | const struct gprs_rlc_data_info *rlc, struct gprs_rlc_data *block, |
| 460 | uint8_t *data, const uint8_t block_idx) |
| 461 | { |
| 462 | const gprs_rlc_data_block_info *rdbi = &rlc->block_info[block_idx]; |
| 463 | |
| 464 | LOGP(DRLCMACUL, LOGL_DEBUG, |
| 465 | "--%s: Got SPB(%d) " |
| 466 | "cs(%s) data block with BSN (%d), " |
| 467 | "TFI(%d).\n", name(), rdbi->spb, rlc->cs.name(), rdbi->bsn, |
| 468 | rlc->tfi); |
| 469 | |
| 470 | egprs_rlc_ul_reseg_bsn_state assemble_status = EGPRS_RESEG_INVALID; |
| 471 | |
| 472 | /* Section 10.4.8b of 44.060*/ |
| 473 | if (rdbi->spb == 2) |
| 474 | assemble_status = handle_egprs_ul_first_seg(rlc, |
| 475 | block, data, block_idx); |
| 476 | else if (rdbi->spb == 3) |
| 477 | assemble_status = handle_egprs_ul_second_seg(rlc, |
| 478 | block, data, block_idx); |
| 479 | else { |
| 480 | LOGP(DRLCMACUL, LOGL_ERROR, |
| 481 | "--%s: spb(%d) Not supported SPB for this EGPRS " |
| 482 | "configuration\n", |
| 483 | name(), rdbi->spb); |
| 484 | } |
| 485 | |
| 486 | /* |
| 487 | * When the block is successfully constructed out of segmented blocks |
| 488 | * upgrade the MCS to the type 2 |
| 489 | */ |
| 490 | if (assemble_status == EGPRS_RESEG_DEFAULT) { |
| 491 | switch (GprsCodingScheme::Scheme(rlc->cs)) { |
| 492 | case GprsCodingScheme::MCS3 : |
| 493 | block->cs_last = GprsCodingScheme::MCS6; |
| 494 | LOGP(DRLCMACUL, LOGL_DEBUG, |
| 495 | "--%s: Upgrading to MCS6\n", name()); |
| 496 | break; |
| 497 | case GprsCodingScheme::MCS2 : |
| 498 | block->cs_last = GprsCodingScheme::MCS5; |
| 499 | LOGP(DRLCMACUL, LOGL_DEBUG, |
| 500 | "--%s: Upgrading to MCS5\n", name()); |
| 501 | break; |
| 502 | case GprsCodingScheme::MCS1 : |
| 503 | LOGP(DRLCMACUL, LOGL_DEBUG, |
| 504 | "--%s: Upgrading to MCS4\n", name()); |
| 505 | block->cs_last = GprsCodingScheme::MCS4; |
| 506 | break; |
| 507 | default: |
| 508 | LOGP(DRLCMACUL, LOGL_ERROR, |
| 509 | "--%s: cs(%s) Error in Upgrading to higher MCS\n", |
| 510 | name(), rlc->cs.name()); |
| 511 | break; |
| 512 | } |
| 513 | } |
| 514 | return assemble_status; |
| 515 | } |