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1// SPDX-License-Identifier: GPL-2.02/*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 <asm/bug.h>10#include <linux/coresight-pmu.h>11#include <linux/err.h>12#include <linux/list.h>13#include <linux/zalloc.h>14#include <stdlib.h>15#include <opencsd/c_api/opencsd_c_api.h>16 17#include "cs-etm.h"18#include "cs-etm-decoder.h"19#include "debug.h"20#include "intlist.h"21 22/* use raw logging */23#ifdef CS_DEBUG_RAW24#define CS_LOG_RAW_FRAMES25#ifdef CS_RAW_PACKED26#define CS_RAW_DEBUG_FLAGS (OCSD_DFRMTR_UNPACKED_RAW_OUT | \27 OCSD_DFRMTR_PACKED_RAW_OUT)28#else29#define CS_RAW_DEBUG_FLAGS (OCSD_DFRMTR_UNPACKED_RAW_OUT)30#endif31#endif32 33/*34 * Assume a maximum of 0.1ns elapsed per instruction. This would be the35 * case with a theoretical 10GHz core executing 1 instruction per cycle.36 * Used to estimate the sample time for synthesized instructions because37 * Coresight only emits a timestamp for a range of instructions rather38 * than per instruction.39 */40const u32 INSTR_PER_NS = 10;41 42struct cs_etm_decoder {43 void *data;44 void (*packet_printer)(const char *msg, void *data);45 bool suppress_printing;46 dcd_tree_handle_t dcd_tree;47 cs_etm_mem_cb_type mem_access;48 ocsd_datapath_resp_t prev_return;49 const char *decoder_name;50};51 52static u3253cs_etm_decoder__mem_access(const void *context,54 const ocsd_vaddr_t address,55 const ocsd_mem_space_acc_t mem_space,56 const u8 trace_chan_id,57 const u32 req_size,58 u8 *buffer)59{60 struct cs_etm_decoder *decoder = (struct cs_etm_decoder *) context;61 62 return decoder->mem_access(decoder->data, trace_chan_id, address,63 req_size, buffer, mem_space);64}65 66int cs_etm_decoder__add_mem_access_cb(struct cs_etm_decoder *decoder,67 u64 start, u64 end,68 cs_etm_mem_cb_type cb_func)69{70 decoder->mem_access = cb_func;71 72 if (ocsd_dt_add_callback_trcid_mem_acc(decoder->dcd_tree, start, end,73 OCSD_MEM_SPACE_ANY,74 cs_etm_decoder__mem_access,75 decoder))76 return -1;77 78 return 0;79}80 81int cs_etm_decoder__reset(struct cs_etm_decoder *decoder)82{83 ocsd_datapath_resp_t dp_ret;84 85 decoder->prev_return = OCSD_RESP_CONT;86 decoder->suppress_printing = true;87 dp_ret = ocsd_dt_process_data(decoder->dcd_tree, OCSD_OP_RESET,88 0, 0, NULL, NULL);89 decoder->suppress_printing = false;90 if (OCSD_DATA_RESP_IS_FATAL(dp_ret))91 return -1;92 93 return 0;94}95 96int cs_etm_decoder__get_packet(struct cs_etm_packet_queue *packet_queue,97 struct cs_etm_packet *packet)98{99 if (!packet_queue || !packet)100 return -EINVAL;101 102 /* Nothing to do, might as well just return */103 if (packet_queue->packet_count == 0)104 return 0;105 /*106 * The queueing process in function cs_etm_decoder__buffer_packet()107 * increments the tail *before* using it. This is somewhat counter108 * intuitive but it has the advantage of centralizing tail management109 * at a single location. Because of that we need to follow the same110 * heuristic with the head, i.e we increment it before using its111 * value. Otherwise the first element of the packet queue is not112 * used.113 */114 packet_queue->head = (packet_queue->head + 1) &115 (CS_ETM_PACKET_MAX_BUFFER - 1);116 117 *packet = packet_queue->packet_buffer[packet_queue->head];118 119 packet_queue->packet_count--;120 121 return 1;122}123 124/*125 * Calculate the number of nanoseconds elapsed.126 *127 * instr_count is updated in place with the remainder of the instructions128 * which didn't make up a whole nanosecond.129 */130static u32 cs_etm_decoder__dec_instr_count_to_ns(u32 *instr_count)131{132 const u32 instr_copy = *instr_count;133 134 *instr_count %= INSTR_PER_NS;135 return instr_copy / INSTR_PER_NS;136}137 138static int cs_etm_decoder__gen_etmv3_config(struct cs_etm_trace_params *params,139 ocsd_etmv3_cfg *config)140{141 config->reg_idr = params->etmv3.reg_idr;142 config->reg_ctrl = params->etmv3.reg_ctrl;143 config->reg_ccer = params->etmv3.reg_ccer;144 config->reg_trc_id = params->etmv3.reg_trc_id;145 config->arch_ver = ARCH_V7;146 config->core_prof = profile_CortexA;147 148 return 0;149}150 151#define TRCIDR1_TRCARCHMIN_SHIFT 4152#define TRCIDR1_TRCARCHMIN_MASK GENMASK(7, 4)153#define TRCIDR1_TRCARCHMIN(x) (((x) & TRCIDR1_TRCARCHMIN_MASK) >> TRCIDR1_TRCARCHMIN_SHIFT)154 155static enum _ocsd_arch_version cs_etm_decoder__get_etmv4_arch_ver(u32 reg_idr1)156{157 /*158 * For ETMv4 if the trace minor version is 4 or more then we can assume159 * the architecture is ARCH_AA64 rather than just V8.160 * ARCH_V8 = V8 architecture161 * ARCH_AA64 = Min v8r3 plus additional AA64 PE features162 */163 return TRCIDR1_TRCARCHMIN(reg_idr1) >= 4 ? ARCH_AA64 : ARCH_V8;164}165 166static void cs_etm_decoder__gen_etmv4_config(struct cs_etm_trace_params *params,167 ocsd_etmv4_cfg *config)168{169 config->reg_configr = params->etmv4.reg_configr;170 config->reg_traceidr = params->etmv4.reg_traceidr;171 config->reg_idr0 = params->etmv4.reg_idr0;172 config->reg_idr1 = params->etmv4.reg_idr1;173 config->reg_idr2 = params->etmv4.reg_idr2;174 config->reg_idr8 = params->etmv4.reg_idr8;175 config->reg_idr9 = 0;176 config->reg_idr10 = 0;177 config->reg_idr11 = 0;178 config->reg_idr12 = 0;179 config->reg_idr13 = 0;180 config->arch_ver = cs_etm_decoder__get_etmv4_arch_ver(params->etmv4.reg_idr1);181 config->core_prof = profile_CortexA;182}183 184static void cs_etm_decoder__gen_ete_config(struct cs_etm_trace_params *params,185 ocsd_ete_cfg *config)186{187 config->reg_configr = params->ete.reg_configr;188 config->reg_traceidr = params->ete.reg_traceidr;189 config->reg_idr0 = params->ete.reg_idr0;190 config->reg_idr1 = params->ete.reg_idr1;191 config->reg_idr2 = params->ete.reg_idr2;192 config->reg_idr8 = params->ete.reg_idr8;193 config->reg_devarch = params->ete.reg_devarch;194 config->arch_ver = ARCH_AA64;195 config->core_prof = profile_CortexA;196}197 198static void cs_etm_decoder__print_str_cb(const void *p_context,199 const char *msg,200 const int str_len)201{202 const struct cs_etm_decoder *decoder = p_context;203 204 if (p_context && str_len && !decoder->suppress_printing)205 decoder->packet_printer(msg, decoder->data);206}207 208static int209cs_etm_decoder__init_def_logger_printing(struct cs_etm_decoder_params *d_params,210 struct cs_etm_decoder *decoder)211{212 int ret = 0;213 214 if (d_params->packet_printer == NULL)215 return -1;216 217 decoder->packet_printer = d_params->packet_printer;218 219 /*220 * Set up a library default logger to process any printers221 * (packet/raw frame) we add later.222 */223 ret = ocsd_def_errlog_init(OCSD_ERR_SEV_ERROR, 1);224 if (ret != 0)225 return -1;226 227 /* no stdout / err / file output */228 ret = ocsd_def_errlog_config_output(C_API_MSGLOGOUT_FLG_NONE, NULL);229 if (ret != 0)230 return -1;231 232 /*233 * Set the string CB for the default logger, passes strings to234 * perf print logger.235 */236 ret = ocsd_def_errlog_set_strprint_cb(decoder->dcd_tree,237 (void *)decoder,238 cs_etm_decoder__print_str_cb);239 if (ret != 0)240 ret = -1;241 242 return 0;243}244 245#ifdef CS_LOG_RAW_FRAMES246static void247cs_etm_decoder__init_raw_frame_logging(struct cs_etm_decoder_params *d_params,248 struct cs_etm_decoder *decoder)249{250 /* Only log these during a --dump operation */251 if (d_params->operation == CS_ETM_OPERATION_PRINT) {252 /* set up a library default logger to process the253 * raw frame printer we add later254 */255 ocsd_def_errlog_init(OCSD_ERR_SEV_ERROR, 1);256 257 /* no stdout / err / file output */258 ocsd_def_errlog_config_output(C_API_MSGLOGOUT_FLG_NONE, NULL);259 260 /* set the string CB for the default logger,261 * passes strings to perf print logger.262 */263 ocsd_def_errlog_set_strprint_cb(decoder->dcd_tree,264 (void *)decoder,265 cs_etm_decoder__print_str_cb);266 267 /* use the built in library printer for the raw frames */268 ocsd_dt_set_raw_frame_printer(decoder->dcd_tree,269 CS_RAW_DEBUG_FLAGS);270 }271}272#else273static void274cs_etm_decoder__init_raw_frame_logging(275 struct cs_etm_decoder_params *d_params __maybe_unused,276 struct cs_etm_decoder *decoder __maybe_unused)277{278}279#endif280 281static ocsd_datapath_resp_t282cs_etm_decoder__do_soft_timestamp(struct cs_etm_queue *etmq,283 struct cs_etm_packet_queue *packet_queue,284 const uint8_t trace_chan_id)285{286 u64 estimated_ts;287 288 /* No timestamp packet has been received, nothing to do */289 if (!packet_queue->next_cs_timestamp)290 return OCSD_RESP_CONT;291 292 estimated_ts = packet_queue->cs_timestamp +293 cs_etm_decoder__dec_instr_count_to_ns(&packet_queue->instr_count);294 295 /* Estimated TS can never be higher than the next real one in the trace */296 packet_queue->cs_timestamp = min(packet_queue->next_cs_timestamp, estimated_ts);297 298 /* Tell the front end which traceid_queue needs attention */299 cs_etm__etmq_set_traceid_queue_timestamp(etmq, trace_chan_id);300 301 return OCSD_RESP_WAIT;302}303 304static ocsd_datapath_resp_t305cs_etm_decoder__do_hard_timestamp(struct cs_etm_queue *etmq,306 const ocsd_generic_trace_elem *elem,307 const uint8_t trace_chan_id,308 const ocsd_trc_index_t indx)309{310 struct cs_etm_packet_queue *packet_queue;311 u64 converted_timestamp;312 u64 estimated_first_ts;313 314 /* First get the packet queue for this traceID */315 packet_queue = cs_etm__etmq_get_packet_queue(etmq, trace_chan_id);316 if (!packet_queue)317 return OCSD_RESP_FATAL_SYS_ERR;318 319 /*320 * Coresight timestamps are raw timer values which need to be scaled to ns. Assume321 * 0 is a bad value so don't try to convert it.322 */323 converted_timestamp = elem->timestamp ?324 cs_etm__convert_sample_time(etmq, elem->timestamp) : 0;325 326 /*327 * We've seen a timestamp packet before - simply record the new value.328 * Function do_soft_timestamp() will report the value to the front end,329 * hence asking the decoder to keep decoding rather than stopping.330 */331 if (packet_queue->next_cs_timestamp) {332 /*333 * What was next is now where new ranges start from, overwriting334 * any previous estimate in cs_timestamp335 */336 packet_queue->cs_timestamp = packet_queue->next_cs_timestamp;337 packet_queue->next_cs_timestamp = converted_timestamp;338 return OCSD_RESP_CONT;339 }340 341 if (!converted_timestamp) {342 /*343 * Zero timestamps can be seen due to misconfiguration or hardware bugs.344 * Warn once, and don't try to subtract instr_count as it would result in an345 * underflow.346 */347 packet_queue->cs_timestamp = 0;348 if (!cs_etm__etmq_is_timeless(etmq))349 pr_warning_once("Zero Coresight timestamp found at Idx:%" OCSD_TRC_IDX_STR350 ". Decoding may be improved by prepending 'Z' to your current --itrace arguments.\n",351 indx);352 353 } else if (packet_queue->instr_count / INSTR_PER_NS > converted_timestamp) {354 /*355 * Sanity check that the elem->timestamp - packet_queue->instr_count would not356 * result in an underflow. Warn and clamp at 0 if it would.357 */358 packet_queue->cs_timestamp = 0;359 pr_err("Timestamp calculation underflow at Idx:%" OCSD_TRC_IDX_STR "\n", indx);360 } else {361 /*362 * This is the first timestamp we've seen since the beginning of traces363 * or a discontinuity. Since timestamps packets are generated *after*364 * range packets have been generated, we need to estimate the time at365 * which instructions started by subtracting the number of instructions366 * executed to the timestamp. Don't estimate earlier than the last used367 * timestamp though.368 */369 estimated_first_ts = converted_timestamp -370 (packet_queue->instr_count / INSTR_PER_NS);371 packet_queue->cs_timestamp = max(packet_queue->cs_timestamp, estimated_first_ts);372 }373 packet_queue->next_cs_timestamp = converted_timestamp;374 packet_queue->instr_count = 0;375 376 /* Tell the front end which traceid_queue needs attention */377 cs_etm__etmq_set_traceid_queue_timestamp(etmq, trace_chan_id);378 379 /* Halt processing until we are being told to proceed */380 return OCSD_RESP_WAIT;381}382 383static void384cs_etm_decoder__reset_timestamp(struct cs_etm_packet_queue *packet_queue)385{386 packet_queue->next_cs_timestamp = 0;387 packet_queue->instr_count = 0;388}389 390static ocsd_datapath_resp_t391cs_etm_decoder__buffer_packet(struct cs_etm_queue *etmq,392 struct cs_etm_packet_queue *packet_queue,393 const u8 trace_chan_id,394 enum cs_etm_sample_type sample_type)395{396 u32 et = 0;397 int cpu;398 399 if (packet_queue->packet_count >= CS_ETM_PACKET_MAX_BUFFER - 1)400 return OCSD_RESP_FATAL_SYS_ERR;401 402 if (cs_etm__get_cpu(etmq, trace_chan_id, &cpu) < 0)403 return OCSD_RESP_FATAL_SYS_ERR;404 405 et = packet_queue->tail;406 et = (et + 1) & (CS_ETM_PACKET_MAX_BUFFER - 1);407 packet_queue->tail = et;408 packet_queue->packet_count++;409 410 packet_queue->packet_buffer[et].sample_type = sample_type;411 packet_queue->packet_buffer[et].isa = CS_ETM_ISA_UNKNOWN;412 packet_queue->packet_buffer[et].cpu = cpu;413 packet_queue->packet_buffer[et].start_addr = CS_ETM_INVAL_ADDR;414 packet_queue->packet_buffer[et].end_addr = CS_ETM_INVAL_ADDR;415 packet_queue->packet_buffer[et].instr_count = 0;416 packet_queue->packet_buffer[et].last_instr_taken_branch = false;417 packet_queue->packet_buffer[et].last_instr_size = 0;418 packet_queue->packet_buffer[et].last_instr_type = 0;419 packet_queue->packet_buffer[et].last_instr_subtype = 0;420 packet_queue->packet_buffer[et].last_instr_cond = 0;421 packet_queue->packet_buffer[et].flags = 0;422 packet_queue->packet_buffer[et].exception_number = UINT32_MAX;423 packet_queue->packet_buffer[et].trace_chan_id = trace_chan_id;424 425 if (packet_queue->packet_count == CS_ETM_PACKET_MAX_BUFFER - 1)426 return OCSD_RESP_WAIT;427 428 return OCSD_RESP_CONT;429}430 431static ocsd_datapath_resp_t432cs_etm_decoder__buffer_range(struct cs_etm_queue *etmq,433 struct cs_etm_packet_queue *packet_queue,434 const ocsd_generic_trace_elem *elem,435 const uint8_t trace_chan_id)436{437 int ret = 0;438 struct cs_etm_packet *packet;439 440 ret = cs_etm_decoder__buffer_packet(etmq, packet_queue, trace_chan_id,441 CS_ETM_RANGE);442 if (ret != OCSD_RESP_CONT && ret != OCSD_RESP_WAIT)443 return ret;444 445 packet = &packet_queue->packet_buffer[packet_queue->tail];446 447 switch (elem->isa) {448 case ocsd_isa_aarch64:449 packet->isa = CS_ETM_ISA_A64;450 break;451 case ocsd_isa_arm:452 packet->isa = CS_ETM_ISA_A32;453 break;454 case ocsd_isa_thumb2:455 packet->isa = CS_ETM_ISA_T32;456 break;457 case ocsd_isa_tee:458 case ocsd_isa_jazelle:459 case ocsd_isa_custom:460 case ocsd_isa_unknown:461 default:462 packet->isa = CS_ETM_ISA_UNKNOWN;463 }464 465 packet->start_addr = elem->st_addr;466 packet->end_addr = elem->en_addr;467 packet->instr_count = elem->num_instr_range;468 packet->last_instr_type = elem->last_i_type;469 packet->last_instr_subtype = elem->last_i_subtype;470 packet->last_instr_cond = elem->last_instr_cond;471 472 if (elem->last_i_type == OCSD_INSTR_BR || elem->last_i_type == OCSD_INSTR_BR_INDIRECT)473 packet->last_instr_taken_branch = elem->last_instr_exec;474 else475 packet->last_instr_taken_branch = false;476 477 packet->last_instr_size = elem->last_instr_sz;478 479 /* per-thread scenario, no need to generate a timestamp */480 if (cs_etm__etmq_is_timeless(etmq))481 goto out;482 483 /*484 * The packet queue is full and we haven't seen a timestamp (had we485 * seen one the packet queue wouldn't be full). Let the front end486 * deal with it.487 */488 if (ret == OCSD_RESP_WAIT)489 goto out;490 491 packet_queue->instr_count += elem->num_instr_range;492 /* Tell the front end we have a new timestamp to process */493 ret = cs_etm_decoder__do_soft_timestamp(etmq, packet_queue,494 trace_chan_id);495out:496 return ret;497}498 499static ocsd_datapath_resp_t500cs_etm_decoder__buffer_discontinuity(struct cs_etm_queue *etmq,501 struct cs_etm_packet_queue *queue,502 const uint8_t trace_chan_id)503{504 /*505 * Something happened and who knows when we'll get new traces so506 * reset time statistics.507 */508 cs_etm_decoder__reset_timestamp(queue);509 return cs_etm_decoder__buffer_packet(etmq, queue, trace_chan_id,510 CS_ETM_DISCONTINUITY);511}512 513static ocsd_datapath_resp_t514cs_etm_decoder__buffer_exception(struct cs_etm_queue *etmq,515 struct cs_etm_packet_queue *queue,516 const ocsd_generic_trace_elem *elem,517 const uint8_t trace_chan_id)518{ int ret = 0;519 struct cs_etm_packet *packet;520 521 ret = cs_etm_decoder__buffer_packet(etmq, queue, trace_chan_id,522 CS_ETM_EXCEPTION);523 if (ret != OCSD_RESP_CONT && ret != OCSD_RESP_WAIT)524 return ret;525 526 packet = &queue->packet_buffer[queue->tail];527 packet->exception_number = elem->exception_number;528 529 return ret;530}531 532static ocsd_datapath_resp_t533cs_etm_decoder__buffer_exception_ret(struct cs_etm_queue *etmq,534 struct cs_etm_packet_queue *queue,535 const uint8_t trace_chan_id)536{537 return cs_etm_decoder__buffer_packet(etmq, queue, trace_chan_id,538 CS_ETM_EXCEPTION_RET);539}540 541static ocsd_datapath_resp_t542cs_etm_decoder__set_tid(struct cs_etm_queue *etmq,543 struct cs_etm_packet_queue *packet_queue,544 const ocsd_generic_trace_elem *elem,545 const uint8_t trace_chan_id)546{547 pid_t tid = -1;548 549 /*550 * Process the PE_CONTEXT packets if we have a valid contextID or VMID.551 * If the kernel is running at EL2, the PID is traced in CONTEXTIDR_EL2552 * as VMID, Bit ETM_OPT_CTXTID2 is set in this case.553 */554 switch (cs_etm__get_pid_fmt(etmq)) {555 case CS_ETM_PIDFMT_CTXTID:556 if (elem->context.ctxt_id_valid)557 tid = elem->context.context_id;558 break;559 case CS_ETM_PIDFMT_CTXTID2:560 if (elem->context.vmid_valid)561 tid = elem->context.vmid;562 break;563 case CS_ETM_PIDFMT_NONE:564 default:565 break;566 }567 568 if (cs_etm__etmq_set_tid_el(etmq, tid, trace_chan_id,569 elem->context.exception_level))570 return OCSD_RESP_FATAL_SYS_ERR;571 572 if (tid == -1)573 return OCSD_RESP_CONT;574 575 /*576 * A timestamp is generated after a PE_CONTEXT element so make sure577 * to rely on that coming one.578 */579 cs_etm_decoder__reset_timestamp(packet_queue);580 581 return OCSD_RESP_CONT;582}583 584static ocsd_datapath_resp_t cs_etm_decoder__gen_trace_elem_printer(585 const void *context,586 const ocsd_trc_index_t indx,587 const u8 trace_chan_id __maybe_unused,588 const ocsd_generic_trace_elem *elem)589{590 ocsd_datapath_resp_t resp = OCSD_RESP_CONT;591 struct cs_etm_decoder *decoder = (struct cs_etm_decoder *) context;592 struct cs_etm_queue *etmq = decoder->data;593 struct cs_etm_packet_queue *packet_queue;594 595 /* First get the packet queue for this traceID */596 packet_queue = cs_etm__etmq_get_packet_queue(etmq, trace_chan_id);597 if (!packet_queue)598 return OCSD_RESP_FATAL_SYS_ERR;599 600 switch (elem->elem_type) {601 case OCSD_GEN_TRC_ELEM_UNKNOWN:602 break;603 case OCSD_GEN_TRC_ELEM_EO_TRACE:604 case OCSD_GEN_TRC_ELEM_NO_SYNC:605 case OCSD_GEN_TRC_ELEM_TRACE_ON:606 resp = cs_etm_decoder__buffer_discontinuity(etmq, packet_queue,607 trace_chan_id);608 break;609 case OCSD_GEN_TRC_ELEM_INSTR_RANGE:610 resp = cs_etm_decoder__buffer_range(etmq, packet_queue, elem,611 trace_chan_id);612 break;613 case OCSD_GEN_TRC_ELEM_EXCEPTION:614 resp = cs_etm_decoder__buffer_exception(etmq, packet_queue, elem,615 trace_chan_id);616 break;617 case OCSD_GEN_TRC_ELEM_EXCEPTION_RET:618 resp = cs_etm_decoder__buffer_exception_ret(etmq, packet_queue,619 trace_chan_id);620 break;621 case OCSD_GEN_TRC_ELEM_TIMESTAMP:622 resp = cs_etm_decoder__do_hard_timestamp(etmq, elem,623 trace_chan_id,624 indx);625 break;626 case OCSD_GEN_TRC_ELEM_PE_CONTEXT:627 resp = cs_etm_decoder__set_tid(etmq, packet_queue,628 elem, trace_chan_id);629 break;630 /* Unused packet types */631 case OCSD_GEN_TRC_ELEM_I_RANGE_NOPATH:632 case OCSD_GEN_TRC_ELEM_ADDR_NACC:633 case OCSD_GEN_TRC_ELEM_CYCLE_COUNT:634 case OCSD_GEN_TRC_ELEM_ADDR_UNKNOWN:635 case OCSD_GEN_TRC_ELEM_EVENT:636 case OCSD_GEN_TRC_ELEM_SWTRACE:637 case OCSD_GEN_TRC_ELEM_CUSTOM:638 case OCSD_GEN_TRC_ELEM_SYNC_MARKER:639 case OCSD_GEN_TRC_ELEM_MEMTRANS:640#if (OCSD_VER_NUM >= 0x010400)641 case OCSD_GEN_TRC_ELEM_INSTRUMENTATION:642#endif643 default:644 break;645 }646 647 return resp;648}649 650static int651cs_etm_decoder__create_etm_decoder(struct cs_etm_decoder_params *d_params,652 struct cs_etm_trace_params *t_params,653 struct cs_etm_decoder *decoder)654{655 ocsd_etmv3_cfg config_etmv3;656 ocsd_etmv4_cfg trace_config_etmv4;657 ocsd_ete_cfg trace_config_ete;658 void *trace_config;659 u8 csid;660 661 switch (t_params->protocol) {662 case CS_ETM_PROTO_ETMV3:663 case CS_ETM_PROTO_PTM:664 csid = (t_params->etmv3.reg_idr & CORESIGHT_TRACE_ID_VAL_MASK);665 cs_etm_decoder__gen_etmv3_config(t_params, &config_etmv3);666 decoder->decoder_name = (t_params->protocol == CS_ETM_PROTO_ETMV3) ?667 OCSD_BUILTIN_DCD_ETMV3 :668 OCSD_BUILTIN_DCD_PTM;669 trace_config = &config_etmv3;670 break;671 case CS_ETM_PROTO_ETMV4i:672 csid = (t_params->etmv4.reg_traceidr & CORESIGHT_TRACE_ID_VAL_MASK);673 cs_etm_decoder__gen_etmv4_config(t_params, &trace_config_etmv4);674 decoder->decoder_name = OCSD_BUILTIN_DCD_ETMV4I;675 trace_config = &trace_config_etmv4;676 break;677 case CS_ETM_PROTO_ETE:678 csid = (t_params->ete.reg_traceidr & CORESIGHT_TRACE_ID_VAL_MASK);679 cs_etm_decoder__gen_ete_config(t_params, &trace_config_ete);680 decoder->decoder_name = OCSD_BUILTIN_DCD_ETE;681 trace_config = &trace_config_ete;682 break;683 default:684 return -1;685 }686 687 if (d_params->operation == CS_ETM_OPERATION_DECODE) {688 if (ocsd_dt_create_decoder(decoder->dcd_tree,689 decoder->decoder_name,690 OCSD_CREATE_FLG_FULL_DECODER,691 trace_config, &csid))692 return -1;693 694 if (ocsd_dt_set_gen_elem_outfn(decoder->dcd_tree,695 cs_etm_decoder__gen_trace_elem_printer,696 decoder))697 return -1;698 699 return 0;700 } else if (d_params->operation == CS_ETM_OPERATION_PRINT) {701 if (ocsd_dt_create_decoder(decoder->dcd_tree, decoder->decoder_name,702 OCSD_CREATE_FLG_PACKET_PROC,703 trace_config, &csid))704 return -1;705 706 if (ocsd_dt_set_pkt_protocol_printer(decoder->dcd_tree, csid, 0))707 return -1;708 709 return 0;710 }711 712 return -1;713}714 715struct cs_etm_decoder *716cs_etm_decoder__new(int decoders, struct cs_etm_decoder_params *d_params,717 struct cs_etm_trace_params t_params[])718{719 struct cs_etm_decoder *decoder;720 ocsd_dcd_tree_src_t format;721 u32 flags;722 int i, ret;723 724 if ((!t_params) || (!d_params))725 return NULL;726 727 decoder = zalloc(sizeof(*decoder));728 729 if (!decoder)730 return NULL;731 732 decoder->data = d_params->data;733 decoder->prev_return = OCSD_RESP_CONT;734 format = (d_params->formatted ? OCSD_TRC_SRC_FRAME_FORMATTED :735 OCSD_TRC_SRC_SINGLE);736 flags = 0;737 flags |= (d_params->fsyncs ? OCSD_DFRMTR_HAS_FSYNCS : 0);738 flags |= (d_params->hsyncs ? OCSD_DFRMTR_HAS_HSYNCS : 0);739 flags |= (d_params->frame_aligned ? OCSD_DFRMTR_FRAME_MEM_ALIGN : 0);740 741 /*742 * Drivers may add barrier frames when used with perf, set up to743 * handle this. Barriers const of FSYNC packet repeated 4 times.744 */745 flags |= OCSD_DFRMTR_RESET_ON_4X_FSYNC;746 747 /* Create decode tree for the data source */748 decoder->dcd_tree = ocsd_create_dcd_tree(format, flags);749 750 if (decoder->dcd_tree == 0)751 goto err_free_decoder;752 753 /* init library print logging support */754 ret = cs_etm_decoder__init_def_logger_printing(d_params, decoder);755 if (ret != 0)756 goto err_free_decoder;757 758 /* init raw frame logging if required */759 cs_etm_decoder__init_raw_frame_logging(d_params, decoder);760 761 for (i = 0; i < decoders; i++) {762 ret = cs_etm_decoder__create_etm_decoder(d_params,763 &t_params[i],764 decoder);765 if (ret != 0)766 goto err_free_decoder;767 }768 769 return decoder;770 771err_free_decoder:772 cs_etm_decoder__free(decoder);773 return NULL;774}775 776int cs_etm_decoder__process_data_block(struct cs_etm_decoder *decoder,777 u64 indx, const u8 *buf,778 size_t len, size_t *consumed)779{780 int ret = 0;781 ocsd_datapath_resp_t cur = OCSD_RESP_CONT;782 ocsd_datapath_resp_t prev_return = decoder->prev_return;783 size_t processed = 0;784 u32 count;785 786 while (processed < len) {787 if (OCSD_DATA_RESP_IS_WAIT(prev_return)) {788 cur = ocsd_dt_process_data(decoder->dcd_tree,789 OCSD_OP_FLUSH,790 0,791 0,792 NULL,793 NULL);794 } else if (OCSD_DATA_RESP_IS_CONT(prev_return)) {795 cur = ocsd_dt_process_data(decoder->dcd_tree,796 OCSD_OP_DATA,797 indx + processed,798 len - processed,799 &buf[processed],800 &count);801 processed += count;802 } else {803 ret = -EINVAL;804 break;805 }806 807 /*808 * Return to the input code if the packet buffer is full.809 * Flushing will get done once the packet buffer has been810 * processed.811 */812 if (OCSD_DATA_RESP_IS_WAIT(cur))813 break;814 815 prev_return = cur;816 }817 818 decoder->prev_return = cur;819 *consumed = processed;820 821 return ret;822}823 824void cs_etm_decoder__free(struct cs_etm_decoder *decoder)825{826 if (!decoder)827 return;828 829 ocsd_destroy_dcd_tree(decoder->dcd_tree);830 decoder->dcd_tree = NULL;831 free(decoder);832}833 834const char *cs_etm_decoder__get_name(struct cs_etm_decoder *decoder)835{836 return decoder->decoder_name;837}838