1// SPDX-License-Identifier: GPL-2.0 2/* 3 * Copyright(C) 2015-2018 Linaro Limited. 4 * 5 * Author: Tor Jeremiassen <tor@ti.com> 6 * Author: Mathieu Poirier <mathieu.poirier@linaro.org> 7 */ 8 9#include <linux/err.h> 10#include <linux/list.h> 11#include <linux/zalloc.h> 12#include <stdlib.h> 13#include <opencsd/c_api/opencsd_c_api.h> 14#include <opencsd/etmv4/trc_pkt_types_etmv4.h> 15#include <opencsd/ocsd_if_types.h> 16 17#include "cs-etm.h" 18#include "cs-etm-decoder.h" 19#include "intlist.h" 20 21/* use raw logging */ 22#ifdef CS_DEBUG_RAW 23#define CS_LOG_RAW_FRAMES 24#ifdef CS_RAW_PACKED 25#define CS_RAW_DEBUG_FLAGS (OCSD_DFRMTR_UNPACKED_RAW_OUT | \ 26 OCSD_DFRMTR_PACKED_RAW_OUT) 27#else 28#define CS_RAW_DEBUG_FLAGS (OCSD_DFRMTR_UNPACKED_RAW_OUT) 29#endif 30#endif 31 32struct cs_etm_decoder { 33 void *data; 34 void (*packet_printer)(const char *msg); 35 dcd_tree_handle_t dcd_tree; 36 cs_etm_mem_cb_type mem_access; 37 ocsd_datapath_resp_t prev_return; 38}; 39 40static u32 41cs_etm_decoder__mem_access(const void *context, 42 const ocsd_vaddr_t address, 43 const ocsd_mem_space_acc_t mem_space __maybe_unused, 44 const u8 trace_chan_id, 45 const u32 req_size, 46 u8 *buffer) 47{ 48 struct cs_etm_decoder *decoder = (struct cs_etm_decoder *) context; 49 50 return decoder->mem_access(decoder->data, trace_chan_id, 51 address, req_size, buffer); 52} 53 54int cs_etm_decoder__add_mem_access_cb(struct cs_etm_decoder *decoder, 55 u64 start, u64 end, 56 cs_etm_mem_cb_type cb_func) 57{ 58 decoder->mem_access = cb_func; 59 60 if (ocsd_dt_add_callback_trcid_mem_acc(decoder->dcd_tree, start, end, 61 OCSD_MEM_SPACE_ANY, 62 cs_etm_decoder__mem_access, 63 decoder)) 64 return -1; 65 66 return 0; 67} 68 69int cs_etm_decoder__reset(struct cs_etm_decoder *decoder) 70{ 71 ocsd_datapath_resp_t dp_ret; 72 73 decoder->prev_return = OCSD_RESP_CONT; 74 75 dp_ret = ocsd_dt_process_data(decoder->dcd_tree, OCSD_OP_RESET, 76 0, 0, NULL, NULL); 77 if (OCSD_DATA_RESP_IS_FATAL(dp_ret)) 78 return -1; 79 80 return 0; 81} 82 83int cs_etm_decoder__get_packet(struct cs_etm_packet_queue *packet_queue, 84 struct cs_etm_packet *packet) 85{ 86 if (!packet_queue || !packet) 87 return -EINVAL; 88 89 /* Nothing to do, might as well just return */ 90 if (packet_queue->packet_count == 0) 91 return 0; 92 /* 93 * The queueing process in function cs_etm_decoder__buffer_packet() 94 * increments the tail *before* using it. This is somewhat counter 95 * intuitive but it has the advantage of centralizing tail management 96 * at a single location. Because of that we need to follow the same 97 * heuristic with the head, i.e we increment it before using its 98 * value. Otherwise the first element of the packet queue is not 99 * used. 100 */ 101 packet_queue->head = (packet_queue->head + 1) & 102 (CS_ETM_PACKET_MAX_BUFFER - 1); 103 104 *packet = packet_queue->packet_buffer[packet_queue->head]; 105 106 packet_queue->packet_count--; 107 108 return 1; 109} 110 111static int cs_etm_decoder__gen_etmv3_config(struct cs_etm_trace_params *params, 112 ocsd_etmv3_cfg *config) 113{ 114 config->reg_idr = params->etmv3.reg_idr; 115 config->reg_ctrl = params->etmv3.reg_ctrl; 116 config->reg_ccer = params->etmv3.reg_ccer; 117 config->reg_trc_id = params->etmv3.reg_trc_id; 118 config->arch_ver = ARCH_V7; 119 config->core_prof = profile_CortexA; 120 121 return 0; 122} 123 124static void cs_etm_decoder__gen_etmv4_config(struct cs_etm_trace_params *params, 125 ocsd_etmv4_cfg *config) 126{ 127 config->reg_configr = params->etmv4.reg_configr; 128 config->reg_traceidr = params->etmv4.reg_traceidr; 129 config->reg_idr0 = params->etmv4.reg_idr0; 130 config->reg_idr1 = params->etmv4.reg_idr1; 131 config->reg_idr2 = params->etmv4.reg_idr2; 132 config->reg_idr8 = params->etmv4.reg_idr8; 133 config->reg_idr9 = 0; 134 config->reg_idr10 = 0; 135 config->reg_idr11 = 0; 136 config->reg_idr12 = 0; 137 config->reg_idr13 = 0; 138 config->arch_ver = ARCH_V8; 139 config->core_prof = profile_CortexA; 140} 141 142static void cs_etm_decoder__print_str_cb(const void *p_context, 143 const char *msg, 144 const int str_len) 145{ 146 if (p_context && str_len) 147 ((struct cs_etm_decoder *)p_context)->packet_printer(msg); 148} 149 150static int 151cs_etm_decoder__init_def_logger_printing(struct cs_etm_decoder_params *d_params, 152 struct cs_etm_decoder *decoder) 153{ 154 int ret = 0; 155 156 if (d_params->packet_printer == NULL) 157 return -1; 158 159 decoder->packet_printer = d_params->packet_printer; 160 161 /* 162 * Set up a library default logger to process any printers 163 * (packet/raw frame) we add later. 164 */ 165 ret = ocsd_def_errlog_init(OCSD_ERR_SEV_ERROR, 1); 166 if (ret != 0) 167 return -1; 168 169 /* no stdout / err / file output */ 170 ret = ocsd_def_errlog_config_output(C_API_MSGLOGOUT_FLG_NONE, NULL); 171 if (ret != 0) 172 return -1; 173 174 /* 175 * Set the string CB for the default logger, passes strings to 176 * perf print logger. 177 */ 178 ret = ocsd_def_errlog_set_strprint_cb(decoder->dcd_tree, 179 (void *)decoder, 180 cs_etm_decoder__print_str_cb); 181 if (ret != 0) 182 ret = -1; 183 184 return 0; 185} 186 187#ifdef CS_LOG_RAW_FRAMES 188static void 189cs_etm_decoder__init_raw_frame_logging(struct cs_etm_decoder_params *d_params, 190 struct cs_etm_decoder *decoder) 191{ 192 /* Only log these during a --dump operation */ 193 if (d_params->operation == CS_ETM_OPERATION_PRINT) { 194 /* set up a library default logger to process the 195 * raw frame printer we add later 196 */ 197 ocsd_def_errlog_init(OCSD_ERR_SEV_ERROR, 1); 198 199 /* no stdout / err / file output */ 200 ocsd_def_errlog_config_output(C_API_MSGLOGOUT_FLG_NONE, NULL); 201 202 /* set the string CB for the default logger, 203 * passes strings to perf print logger. 204 */ 205 ocsd_def_errlog_set_strprint_cb(decoder->dcd_tree, 206 (void *)decoder, 207 cs_etm_decoder__print_str_cb); 208 209 /* use the built in library printer for the raw frames */ 210 ocsd_dt_set_raw_frame_printer(decoder->dcd_tree, 211 CS_RAW_DEBUG_FLAGS); 212 } 213} 214#else 215static void 216cs_etm_decoder__init_raw_frame_logging( 217 struct cs_etm_decoder_params *d_params __maybe_unused, 218 struct cs_etm_decoder *decoder __maybe_unused) 219{ 220} 221#endif 222 223static int cs_etm_decoder__create_packet_printer(struct cs_etm_decoder *decoder, 224 const char *decoder_name, 225 void *trace_config) 226{ 227 u8 csid; 228 229 if (ocsd_dt_create_decoder(decoder->dcd_tree, decoder_name, 230 OCSD_CREATE_FLG_PACKET_PROC, 231 trace_config, &csid)) 232 return -1; 233 234 if (ocsd_dt_set_pkt_protocol_printer(decoder->dcd_tree, csid, 0)) 235 return -1; 236 237 return 0; 238} 239 240static int 241cs_etm_decoder__create_etm_packet_printer(struct cs_etm_trace_params *t_params, 242 struct cs_etm_decoder *decoder) 243{ 244 const char *decoder_name; 245 ocsd_etmv3_cfg config_etmv3; 246 ocsd_etmv4_cfg trace_config_etmv4; 247 void *trace_config; 248 249 switch (t_params->protocol) { 250 case CS_ETM_PROTO_ETMV3: 251 case CS_ETM_PROTO_PTM: 252 cs_etm_decoder__gen_etmv3_config(t_params, &config_etmv3); 253 decoder_name = (t_params->protocol == CS_ETM_PROTO_ETMV3) ? 254 OCSD_BUILTIN_DCD_ETMV3 : 255 OCSD_BUILTIN_DCD_PTM; 256 trace_config = &config_etmv3; 257 break; 258 case CS_ETM_PROTO_ETMV4i: 259 cs_etm_decoder__gen_etmv4_config(t_params, &trace_config_etmv4); 260 decoder_name = OCSD_BUILTIN_DCD_ETMV4I; 261 trace_config = &trace_config_etmv4; 262 break; 263 default: 264 return -1; 265 } 266 267 return cs_etm_decoder__create_packet_printer(decoder, 268 decoder_name, 269 trace_config); 270} 271 272static ocsd_datapath_resp_t 273cs_etm_decoder__do_soft_timestamp(struct cs_etm_queue *etmq, 274 struct cs_etm_packet_queue *packet_queue, 275 const uint8_t trace_chan_id) 276{ 277 /* No timestamp packet has been received, nothing to do */ 278 if (!packet_queue->timestamp) 279 return OCSD_RESP_CONT; 280 281 packet_queue->timestamp = packet_queue->next_timestamp; 282 283 /* Estimate the timestamp for the next range packet */ 284 packet_queue->next_timestamp += packet_queue->instr_count; 285 packet_queue->instr_count = 0; 286 287 /* Tell the front end which traceid_queue needs attention */ 288 cs_etm__etmq_set_traceid_queue_timestamp(etmq, trace_chan_id); 289 290 return OCSD_RESP_WAIT; 291} 292 293static ocsd_datapath_resp_t 294cs_etm_decoder__do_hard_timestamp(struct cs_etm_queue *etmq, 295 const ocsd_generic_trace_elem *elem, 296 const uint8_t trace_chan_id) 297{ 298 struct cs_etm_packet_queue *packet_queue; 299 300 /* First get the packet queue for this traceID */ 301 packet_queue = cs_etm__etmq_get_packet_queue(etmq, trace_chan_id); 302 if (!packet_queue) 303 return OCSD_RESP_FATAL_SYS_ERR; 304 305 /* 306 * We've seen a timestamp packet before - simply record the new value. 307 * Function do_soft_timestamp() will report the value to the front end, 308 * hence asking the decoder to keep decoding rather than stopping. 309 */ 310 if (packet_queue->timestamp) { 311 packet_queue->next_timestamp = elem->timestamp; 312 return OCSD_RESP_CONT; 313 } 314 315 /* 316 * This is the first timestamp we've seen since the beginning of traces 317 * or a discontinuity. Since timestamps packets are generated *after* 318 * range packets have been generated, we need to estimate the time at 319 * which instructions started by substracting the number of instructions 320 * executed to the timestamp. 321 */ 322 packet_queue->timestamp = elem->timestamp - packet_queue->instr_count; 323 packet_queue->next_timestamp = elem->timestamp; 324 packet_queue->instr_count = 0; 325 326 /* Tell the front end which traceid_queue needs attention */ 327 cs_etm__etmq_set_traceid_queue_timestamp(etmq, trace_chan_id); 328 329 /* Halt processing until we are being told to proceed */ 330 return OCSD_RESP_WAIT; 331} 332 333static void 334cs_etm_decoder__reset_timestamp(struct cs_etm_packet_queue *packet_queue) 335{ 336 packet_queue->timestamp = 0; 337 packet_queue->next_timestamp = 0; 338 packet_queue->instr_count = 0; 339} 340 341static ocsd_datapath_resp_t 342cs_etm_decoder__buffer_packet(struct cs_etm_packet_queue *packet_queue, 343 const u8 trace_chan_id, 344 enum cs_etm_sample_type sample_type) 345{ 346 u32 et = 0; 347 int cpu; 348 349 if (packet_queue->packet_count >= CS_ETM_PACKET_MAX_BUFFER - 1) 350 return OCSD_RESP_FATAL_SYS_ERR; 351 352 if (cs_etm__get_cpu(trace_chan_id, &cpu) < 0) 353 return OCSD_RESP_FATAL_SYS_ERR; 354 355 et = packet_queue->tail; 356 et = (et + 1) & (CS_ETM_PACKET_MAX_BUFFER - 1); 357 packet_queue->tail = et; 358 packet_queue->packet_count++; 359 360 packet_queue->packet_buffer[et].sample_type = sample_type; 361 packet_queue->packet_buffer[et].isa = CS_ETM_ISA_UNKNOWN; 362 packet_queue->packet_buffer[et].cpu = cpu; 363 packet_queue->packet_buffer[et].start_addr = CS_ETM_INVAL_ADDR; 364 packet_queue->packet_buffer[et].end_addr = CS_ETM_INVAL_ADDR; 365 packet_queue->packet_buffer[et].instr_count = 0; 366 packet_queue->packet_buffer[et].last_instr_taken_branch = false; 367 packet_queue->packet_buffer[et].last_instr_size = 0; 368 packet_queue->packet_buffer[et].last_instr_type = 0; 369 packet_queue->packet_buffer[et].last_instr_subtype = 0; 370 packet_queue->packet_buffer[et].last_instr_cond = 0; 371 packet_queue->packet_buffer[et].flags = 0; 372 packet_queue->packet_buffer[et].exception_number = UINT32_MAX; 373 packet_queue->packet_buffer[et].trace_chan_id = trace_chan_id; 374 375 if (packet_queue->packet_count == CS_ETM_PACKET_MAX_BUFFER - 1) 376 return OCSD_RESP_WAIT; 377 378 return OCSD_RESP_CONT; 379} 380 381static ocsd_datapath_resp_t 382cs_etm_decoder__buffer_range(struct cs_etm_queue *etmq, 383 struct cs_etm_packet_queue *packet_queue, 384 const ocsd_generic_trace_elem *elem, 385 const uint8_t trace_chan_id) 386{ 387 int ret = 0; 388 struct cs_etm_packet *packet; 389 390 ret = cs_etm_decoder__buffer_packet(packet_queue, trace_chan_id, 391 CS_ETM_RANGE); 392 if (ret != OCSD_RESP_CONT && ret != OCSD_RESP_WAIT) 393 return ret; 394 395 packet = &packet_queue->packet_buffer[packet_queue->tail]; 396 397 switch (elem->isa) { 398 case ocsd_isa_aarch64: 399 packet->isa = CS_ETM_ISA_A64; 400 break; 401 case ocsd_isa_arm: 402 packet->isa = CS_ETM_ISA_A32; 403 break; 404 case ocsd_isa_thumb2: 405 packet->isa = CS_ETM_ISA_T32; 406 break; 407 case ocsd_isa_tee: 408 case ocsd_isa_jazelle: 409 case ocsd_isa_custom: 410 case ocsd_isa_unknown: 411 default: 412 packet->isa = CS_ETM_ISA_UNKNOWN; 413 } 414 415 packet->start_addr = elem->st_addr; 416 packet->end_addr = elem->en_addr; 417 packet->instr_count = elem->num_instr_range; 418 packet->last_instr_type = elem->last_i_type; 419 packet->last_instr_subtype = elem->last_i_subtype; 420 packet->last_instr_cond = elem->last_instr_cond; 421 422 switch (elem->last_i_type) { 423 case OCSD_INSTR_BR: 424 case OCSD_INSTR_BR_INDIRECT: 425 packet->last_instr_taken_branch = elem->last_instr_exec; 426 break; 427 case OCSD_INSTR_ISB: 428 case OCSD_INSTR_DSB_DMB: 429 case OCSD_INSTR_WFI_WFE: 430 case OCSD_INSTR_OTHER: 431 default: 432 packet->last_instr_taken_branch = false; 433 break; 434 } 435 436 packet->last_instr_size = elem->last_instr_sz; 437 438 /* per-thread scenario, no need to generate a timestamp */ 439 if (cs_etm__etmq_is_timeless(etmq)) 440 goto out; 441 442 /* 443 * The packet queue is full and we haven't seen a timestamp (had we 444 * seen one the packet queue wouldn't be full). Let the front end 445 * deal with it. 446 */ 447 if (ret == OCSD_RESP_WAIT) 448 goto out; 449 450 packet_queue->instr_count += elem->num_instr_range; 451 /* Tell the front end we have a new timestamp to process */ 452 ret = cs_etm_decoder__do_soft_timestamp(etmq, packet_queue, 453 trace_chan_id); 454out: 455 return ret; 456} 457 458static ocsd_datapath_resp_t 459cs_etm_decoder__buffer_discontinuity(struct cs_etm_packet_queue *queue, 460 const uint8_t trace_chan_id) 461{ 462 /* 463 * Something happened and who knows when we'll get new traces so 464 * reset time statistics. 465 */ 466 cs_etm_decoder__reset_timestamp(queue); 467 return cs_etm_decoder__buffer_packet(queue, trace_chan_id, 468 CS_ETM_DISCONTINUITY); 469} 470 471static ocsd_datapath_resp_t 472cs_etm_decoder__buffer_exception(struct cs_etm_packet_queue *queue, 473 const ocsd_generic_trace_elem *elem, 474 const uint8_t trace_chan_id) 475{ int ret = 0; 476 struct cs_etm_packet *packet; 477 478 ret = cs_etm_decoder__buffer_packet(queue, trace_chan_id, 479 CS_ETM_EXCEPTION); 480 if (ret != OCSD_RESP_CONT && ret != OCSD_RESP_WAIT) 481 return ret; 482 483 packet = &queue->packet_buffer[queue->tail]; 484 packet->exception_number = elem->exception_number; 485 486 return ret; 487} 488 489static ocsd_datapath_resp_t 490cs_etm_decoder__buffer_exception_ret(struct cs_etm_packet_queue *queue, 491 const uint8_t trace_chan_id) 492{ 493 return cs_etm_decoder__buffer_packet(queue, trace_chan_id, 494 CS_ETM_EXCEPTION_RET); 495} 496 497static ocsd_datapath_resp_t 498cs_etm_decoder__set_tid(struct cs_etm_queue *etmq, 499 struct cs_etm_packet_queue *packet_queue, 500 const ocsd_generic_trace_elem *elem, 501 const uint8_t trace_chan_id) 502{ 503 pid_t tid; 504 505 /* Ignore PE_CONTEXT packets that don't have a valid contextID */ 506 if (!elem->context.ctxt_id_valid) 507 return OCSD_RESP_CONT; 508 509 tid = elem->context.context_id; 510 if (cs_etm__etmq_set_tid(etmq, tid, trace_chan_id)) 511 return OCSD_RESP_FATAL_SYS_ERR; 512 513 /* 514 * A timestamp is generated after a PE_CONTEXT element so make sure 515 * to rely on that coming one. 516 */ 517 cs_etm_decoder__reset_timestamp(packet_queue); 518 519 return OCSD_RESP_CONT; 520} 521 522static ocsd_datapath_resp_t cs_etm_decoder__gen_trace_elem_printer( 523 const void *context, 524 const ocsd_trc_index_t indx __maybe_unused, 525 const u8 trace_chan_id __maybe_unused, 526 const ocsd_generic_trace_elem *elem) 527{ 528 ocsd_datapath_resp_t resp = OCSD_RESP_CONT; 529 struct cs_etm_decoder *decoder = (struct cs_etm_decoder *) context; 530 struct cs_etm_queue *etmq = decoder->data; 531 struct cs_etm_packet_queue *packet_queue; 532 533 /* First get the packet queue for this traceID */ 534 packet_queue = cs_etm__etmq_get_packet_queue(etmq, trace_chan_id); 535 if (!packet_queue) 536 return OCSD_RESP_FATAL_SYS_ERR; 537 538 switch (elem->elem_type) { 539 case OCSD_GEN_TRC_ELEM_UNKNOWN: 540 break; 541 case OCSD_GEN_TRC_ELEM_EO_TRACE: 542 case OCSD_GEN_TRC_ELEM_NO_SYNC: 543 case OCSD_GEN_TRC_ELEM_TRACE_ON: 544 resp = cs_etm_decoder__buffer_discontinuity(packet_queue, 545 trace_chan_id); 546 break; 547 case OCSD_GEN_TRC_ELEM_INSTR_RANGE: 548 resp = cs_etm_decoder__buffer_range(etmq, packet_queue, elem, 549 trace_chan_id); 550 break; 551 case OCSD_GEN_TRC_ELEM_EXCEPTION: 552 resp = cs_etm_decoder__buffer_exception(packet_queue, elem, 553 trace_chan_id); 554 break; 555 case OCSD_GEN_TRC_ELEM_EXCEPTION_RET: 556 resp = cs_etm_decoder__buffer_exception_ret(packet_queue, 557 trace_chan_id); 558 break; 559 case OCSD_GEN_TRC_ELEM_TIMESTAMP: 560 resp = cs_etm_decoder__do_hard_timestamp(etmq, elem, 561 trace_chan_id); 562 break; 563 case OCSD_GEN_TRC_ELEM_PE_CONTEXT: 564 resp = cs_etm_decoder__set_tid(etmq, packet_queue, 565 elem, trace_chan_id); 566 break; 567 /* Unused packet types */ 568 case OCSD_GEN_TRC_ELEM_I_RANGE_NOPATH: 569 case OCSD_GEN_TRC_ELEM_ADDR_NACC: 570 case OCSD_GEN_TRC_ELEM_CYCLE_COUNT: 571 case OCSD_GEN_TRC_ELEM_ADDR_UNKNOWN: 572 case OCSD_GEN_TRC_ELEM_EVENT: 573 case OCSD_GEN_TRC_ELEM_SWTRACE: 574 case OCSD_GEN_TRC_ELEM_CUSTOM: 575 default: 576 break; 577 } 578 579 return resp; 580} 581 582static int cs_etm_decoder__create_etm_packet_decoder( 583 struct cs_etm_trace_params *t_params, 584 struct cs_etm_decoder *decoder) 585{ 586 const char *decoder_name; 587 ocsd_etmv3_cfg config_etmv3; 588 ocsd_etmv4_cfg trace_config_etmv4; 589 void *trace_config; 590 u8 csid; 591 592 switch (t_params->protocol) { 593 case CS_ETM_PROTO_ETMV3: 594 case CS_ETM_PROTO_PTM: 595 cs_etm_decoder__gen_etmv3_config(t_params, &config_etmv3); 596 decoder_name = (t_params->protocol == CS_ETM_PROTO_ETMV3) ? 597 OCSD_BUILTIN_DCD_ETMV3 : 598 OCSD_BUILTIN_DCD_PTM; 599 trace_config = &config_etmv3; 600 break; 601 case CS_ETM_PROTO_ETMV4i: 602 cs_etm_decoder__gen_etmv4_config(t_params, &trace_config_etmv4); 603 decoder_name = OCSD_BUILTIN_DCD_ETMV4I; 604 trace_config = &trace_config_etmv4; 605 break; 606 default: 607 return -1; 608 } 609 610 if (ocsd_dt_create_decoder(decoder->dcd_tree, 611 decoder_name, 612 OCSD_CREATE_FLG_FULL_DECODER, 613 trace_config, &csid)) 614 return -1; 615 616 if (ocsd_dt_set_gen_elem_outfn(decoder->dcd_tree, 617 cs_etm_decoder__gen_trace_elem_printer, 618 decoder)) 619 return -1; 620 621 return 0; 622} 623 624static int 625cs_etm_decoder__create_etm_decoder(struct cs_etm_decoder_params *d_params, 626 struct cs_etm_trace_params *t_params, 627 struct cs_etm_decoder *decoder) 628{ 629 if (d_params->operation == CS_ETM_OPERATION_PRINT) 630 return cs_etm_decoder__create_etm_packet_printer(t_params, 631 decoder); 632 else if (d_params->operation == CS_ETM_OPERATION_DECODE) 633 return cs_etm_decoder__create_etm_packet_decoder(t_params, 634 decoder); 635 636 return -1; 637} 638 639struct cs_etm_decoder * 640cs_etm_decoder__new(int num_cpu, struct cs_etm_decoder_params *d_params, 641 struct cs_etm_trace_params t_params[]) 642{ 643 struct cs_etm_decoder *decoder; 644 ocsd_dcd_tree_src_t format; 645 u32 flags; 646 int i, ret; 647 648 if ((!t_params) || (!d_params)) 649 return NULL; 650 651 decoder = zalloc(sizeof(*decoder)); 652 653 if (!decoder) 654 return NULL; 655 656 decoder->data = d_params->data; 657 decoder->prev_return = OCSD_RESP_CONT; 658 format = (d_params->formatted ? OCSD_TRC_SRC_FRAME_FORMATTED : 659 OCSD_TRC_SRC_SINGLE); 660 flags = 0; 661 flags |= (d_params->fsyncs ? OCSD_DFRMTR_HAS_FSYNCS : 0); 662 flags |= (d_params->hsyncs ? OCSD_DFRMTR_HAS_HSYNCS : 0); 663 flags |= (d_params->frame_aligned ? OCSD_DFRMTR_FRAME_MEM_ALIGN : 0); 664 665 /* 666 * Drivers may add barrier frames when used with perf, set up to 667 * handle this. Barriers const of FSYNC packet repeated 4 times. 668 */ 669 flags |= OCSD_DFRMTR_RESET_ON_4X_FSYNC; 670 671 /* Create decode tree for the data source */ 672 decoder->dcd_tree = ocsd_create_dcd_tree(format, flags); 673 674 if (decoder->dcd_tree == 0) 675 goto err_free_decoder; 676 677 /* init library print logging support */ 678 ret = cs_etm_decoder__init_def_logger_printing(d_params, decoder); 679 if (ret != 0) 680 goto err_free_decoder; 681 682 /* init raw frame logging if required */ 683 cs_etm_decoder__init_raw_frame_logging(d_params, decoder); 684 685 for (i = 0; i < num_cpu; i++) { 686 ret = cs_etm_decoder__create_etm_decoder(d_params, 687 &t_params[i], 688 decoder); 689 if (ret != 0) 690 goto err_free_decoder; 691 } 692 693 return decoder; 694 695err_free_decoder: 696 cs_etm_decoder__free(decoder); 697 return NULL; 698} 699 700int cs_etm_decoder__process_data_block(struct cs_etm_decoder *decoder, 701 u64 indx, const u8 *buf, 702 size_t len, size_t *consumed) 703{ 704 int ret = 0; 705 ocsd_datapath_resp_t cur = OCSD_RESP_CONT; 706 ocsd_datapath_resp_t prev_return = decoder->prev_return; 707 size_t processed = 0; 708 u32 count; 709 710 while (processed < len) { 711 if (OCSD_DATA_RESP_IS_WAIT(prev_return)) { 712 cur = ocsd_dt_process_data(decoder->dcd_tree, 713 OCSD_OP_FLUSH, 714 0, 715 0, 716 NULL, 717 NULL); 718 } else if (OCSD_DATA_RESP_IS_CONT(prev_return)) { 719 cur = ocsd_dt_process_data(decoder->dcd_tree, 720 OCSD_OP_DATA, 721 indx + processed, 722 len - processed, 723 &buf[processed], 724 &count); 725 processed += count; 726 } else { 727 ret = -EINVAL; 728 break; 729 } 730 731 /* 732 * Return to the input code if the packet buffer is full. 733 * Flushing will get done once the packet buffer has been 734 * processed. 735 */ 736 if (OCSD_DATA_RESP_IS_WAIT(cur)) 737 break; 738 739 prev_return = cur; 740 } 741 742 decoder->prev_return = cur; 743 *consumed = processed; 744 745 return ret; 746} 747 748void cs_etm_decoder__free(struct cs_etm_decoder *decoder) 749{ 750 if (!decoder) 751 return; 752 753 ocsd_destroy_dcd_tree(decoder->dcd_tree); 754 decoder->dcd_tree = NULL; 755 free(decoder); 756} 757