diff options
Diffstat (limited to '')
| -rw-r--r-- | tools/perf/util/cs-etm-decoder/cs-etm-decoder.c | 756 |
1 files changed, 756 insertions, 0 deletions
diff --git a/tools/perf/util/cs-etm-decoder/cs-etm-decoder.c b/tools/perf/util/cs-etm-decoder/cs-etm-decoder.c new file mode 100644 index 000000000..cd007cc9c --- /dev/null +++ b/tools/perf/util/cs-etm-decoder/cs-etm-decoder.c @@ -0,0 +1,756 @@ +// SPDX-License-Identifier: GPL-2.0 +/* + * Copyright(C) 2015-2018 Linaro Limited. + * + * Author: Tor Jeremiassen <tor@ti.com> + * Author: Mathieu Poirier <mathieu.poirier@linaro.org> + */ + +#include <linux/err.h> +#include <linux/list.h> +#include <linux/zalloc.h> +#include <stdlib.h> +#include <opencsd/c_api/opencsd_c_api.h> +#include <opencsd/etmv4/trc_pkt_types_etmv4.h> +#include <opencsd/ocsd_if_types.h> + +#include "cs-etm.h" +#include "cs-etm-decoder.h" +#include "intlist.h" + +/* use raw logging */ +#ifdef CS_DEBUG_RAW +#define CS_LOG_RAW_FRAMES +#ifdef CS_RAW_PACKED +#define CS_RAW_DEBUG_FLAGS (OCSD_DFRMTR_UNPACKED_RAW_OUT | \ + OCSD_DFRMTR_PACKED_RAW_OUT) +#else +#define CS_RAW_DEBUG_FLAGS (OCSD_DFRMTR_UNPACKED_RAW_OUT) +#endif +#endif + +struct cs_etm_decoder { + void *data; + void (*packet_printer)(const char *msg); + dcd_tree_handle_t dcd_tree; + cs_etm_mem_cb_type mem_access; + ocsd_datapath_resp_t prev_return; +}; + +static u32 +cs_etm_decoder__mem_access(const void *context, + const ocsd_vaddr_t address, + const ocsd_mem_space_acc_t mem_space __maybe_unused, + const u8 trace_chan_id, + const u32 req_size, + u8 *buffer) +{ + struct cs_etm_decoder *decoder = (struct cs_etm_decoder *) context; + + return decoder->mem_access(decoder->data, trace_chan_id, + address, req_size, buffer); +} + +int cs_etm_decoder__add_mem_access_cb(struct cs_etm_decoder *decoder, + u64 start, u64 end, + cs_etm_mem_cb_type cb_func) +{ + decoder->mem_access = cb_func; + + if (ocsd_dt_add_callback_trcid_mem_acc(decoder->dcd_tree, start, end, + OCSD_MEM_SPACE_ANY, + cs_etm_decoder__mem_access, + decoder)) + return -1; + + return 0; +} + +int cs_etm_decoder__reset(struct cs_etm_decoder *decoder) +{ + ocsd_datapath_resp_t dp_ret; + + decoder->prev_return = OCSD_RESP_CONT; + + dp_ret = ocsd_dt_process_data(decoder->dcd_tree, OCSD_OP_RESET, + 0, 0, NULL, NULL); + if (OCSD_DATA_RESP_IS_FATAL(dp_ret)) + return -1; + + return 0; +} + +int cs_etm_decoder__get_packet(struct cs_etm_packet_queue *packet_queue, + struct cs_etm_packet *packet) +{ + if (!packet_queue || !packet) + return -EINVAL; + + /* Nothing to do, might as well just return */ + if (packet_queue->packet_count == 0) + return 0; + /* + * The queueing process in function cs_etm_decoder__buffer_packet() + * increments the tail *before* using it. This is somewhat counter + * intuitive but it has the advantage of centralizing tail management + * at a single location. Because of that we need to follow the same + * heuristic with the head, i.e we increment it before using its + * value. Otherwise the first element of the packet queue is not + * used. + */ + packet_queue->head = (packet_queue->head + 1) & + (CS_ETM_PACKET_MAX_BUFFER - 1); + + *packet = packet_queue->packet_buffer[packet_queue->head]; + + packet_queue->packet_count--; + + return 1; +} + +static int cs_etm_decoder__gen_etmv3_config(struct cs_etm_trace_params *params, + ocsd_etmv3_cfg *config) +{ + config->reg_idr = params->etmv3.reg_idr; + config->reg_ctrl = params->etmv3.reg_ctrl; + config->reg_ccer = params->etmv3.reg_ccer; + config->reg_trc_id = params->etmv3.reg_trc_id; + config->arch_ver = ARCH_V7; + config->core_prof = profile_CortexA; + + return 0; +} + +static void cs_etm_decoder__gen_etmv4_config(struct cs_etm_trace_params *params, + ocsd_etmv4_cfg *config) +{ + config->reg_configr = params->etmv4.reg_configr; + config->reg_traceidr = params->etmv4.reg_traceidr; + config->reg_idr0 = params->etmv4.reg_idr0; + config->reg_idr1 = params->etmv4.reg_idr1; + config->reg_idr2 = params->etmv4.reg_idr2; + config->reg_idr8 = params->etmv4.reg_idr8; + config->reg_idr9 = 0; + config->reg_idr10 = 0; + config->reg_idr11 = 0; + config->reg_idr12 = 0; + config->reg_idr13 = 0; + config->arch_ver = ARCH_V8; + config->core_prof = profile_CortexA; +} + +static void cs_etm_decoder__print_str_cb(const void *p_context, + const char *msg, + const int str_len) +{ + if (p_context && str_len) + ((struct cs_etm_decoder *)p_context)->packet_printer(msg); +} + +static int +cs_etm_decoder__init_def_logger_printing(struct cs_etm_decoder_params *d_params, + struct cs_etm_decoder *decoder) +{ + int ret = 0; + + if (d_params->packet_printer == NULL) + return -1; + + decoder->packet_printer = d_params->packet_printer; + + /* + * Set up a library default logger to process any printers + * (packet/raw frame) we add later. + */ + ret = ocsd_def_errlog_init(OCSD_ERR_SEV_ERROR, 1); + if (ret != 0) + return -1; + + /* no stdout / err / file output */ + ret = ocsd_def_errlog_config_output(C_API_MSGLOGOUT_FLG_NONE, NULL); + if (ret != 0) + return -1; + + /* + * Set the string CB for the default logger, passes strings to + * perf print logger. + */ + ret = ocsd_def_errlog_set_strprint_cb(decoder->dcd_tree, + (void *)decoder, + cs_etm_decoder__print_str_cb); + if (ret != 0) + ret = -1; + + return 0; +} + +#ifdef CS_LOG_RAW_FRAMES +static void +cs_etm_decoder__init_raw_frame_logging(struct cs_etm_decoder_params *d_params, + struct cs_etm_decoder *decoder) +{ + /* Only log these during a --dump operation */ + if (d_params->operation == CS_ETM_OPERATION_PRINT) { + /* set up a library default logger to process the + * raw frame printer we add later + */ + ocsd_def_errlog_init(OCSD_ERR_SEV_ERROR, 1); + + /* no stdout / err / file output */ + ocsd_def_errlog_config_output(C_API_MSGLOGOUT_FLG_NONE, NULL); + + /* set the string CB for the default logger, + * passes strings to perf print logger. + */ + ocsd_def_errlog_set_strprint_cb(decoder->dcd_tree, + (void *)decoder, + cs_etm_decoder__print_str_cb); + + /* use the built in library printer for the raw frames */ + ocsd_dt_set_raw_frame_printer(decoder->dcd_tree, + CS_RAW_DEBUG_FLAGS); + } +} +#else +static void +cs_etm_decoder__init_raw_frame_logging( + struct cs_etm_decoder_params *d_params __maybe_unused, + struct cs_etm_decoder *decoder __maybe_unused) +{ +} +#endif + +static int cs_etm_decoder__create_packet_printer(struct cs_etm_decoder *decoder, + const char *decoder_name, + void *trace_config) +{ + u8 csid; + + if (ocsd_dt_create_decoder(decoder->dcd_tree, decoder_name, + OCSD_CREATE_FLG_PACKET_PROC, + trace_config, &csid)) + return -1; + + if (ocsd_dt_set_pkt_protocol_printer(decoder->dcd_tree, csid, 0)) + return -1; + + return 0; +} + +static int +cs_etm_decoder__create_etm_packet_printer(struct cs_etm_trace_params *t_params, + struct cs_etm_decoder *decoder) +{ + const char *decoder_name; + ocsd_etmv3_cfg config_etmv3; + ocsd_etmv4_cfg trace_config_etmv4; + void *trace_config; + + switch (t_params->protocol) { + case CS_ETM_PROTO_ETMV3: + case CS_ETM_PROTO_PTM: + cs_etm_decoder__gen_etmv3_config(t_params, &config_etmv3); + decoder_name = (t_params->protocol == CS_ETM_PROTO_ETMV3) ? + OCSD_BUILTIN_DCD_ETMV3 : + OCSD_BUILTIN_DCD_PTM; + trace_config = &config_etmv3; + break; + case CS_ETM_PROTO_ETMV4i: + cs_etm_decoder__gen_etmv4_config(t_params, &trace_config_etmv4); + decoder_name = OCSD_BUILTIN_DCD_ETMV4I; + trace_config = &trace_config_etmv4; + break; + default: + return -1; + } + + return cs_etm_decoder__create_packet_printer(decoder, + decoder_name, + trace_config); +} + +static ocsd_datapath_resp_t +cs_etm_decoder__do_soft_timestamp(struct cs_etm_queue *etmq, + struct cs_etm_packet_queue *packet_queue, + const uint8_t trace_chan_id) +{ + /* No timestamp packet has been received, nothing to do */ + if (!packet_queue->timestamp) + return OCSD_RESP_CONT; + + packet_queue->timestamp = packet_queue->next_timestamp; + + /* Estimate the timestamp for the next range packet */ + packet_queue->next_timestamp += packet_queue->instr_count; + packet_queue->instr_count = 0; + + /* Tell the front end which traceid_queue needs attention */ + cs_etm__etmq_set_traceid_queue_timestamp(etmq, trace_chan_id); + + return OCSD_RESP_WAIT; +} + +static ocsd_datapath_resp_t +cs_etm_decoder__do_hard_timestamp(struct cs_etm_queue *etmq, + const ocsd_generic_trace_elem *elem, + const uint8_t trace_chan_id) +{ + struct cs_etm_packet_queue *packet_queue; + + /* First get the packet queue for this traceID */ + packet_queue = cs_etm__etmq_get_packet_queue(etmq, trace_chan_id); + if (!packet_queue) + return OCSD_RESP_FATAL_SYS_ERR; + + /* + * We've seen a timestamp packet before - simply record the new value. + * Function do_soft_timestamp() will report the value to the front end, + * hence asking the decoder to keep decoding rather than stopping. + */ + if (packet_queue->timestamp) { + packet_queue->next_timestamp = elem->timestamp; + return OCSD_RESP_CONT; + } + + /* + * This is the first timestamp we've seen since the beginning of traces + * or a discontinuity. Since timestamps packets are generated *after* + * range packets have been generated, we need to estimate the time at + * which instructions started by substracting the number of instructions + * executed to the timestamp. + */ + packet_queue->timestamp = elem->timestamp - packet_queue->instr_count; + packet_queue->next_timestamp = elem->timestamp; + packet_queue->instr_count = 0; + + /* Tell the front end which traceid_queue needs attention */ + cs_etm__etmq_set_traceid_queue_timestamp(etmq, trace_chan_id); + + /* Halt processing until we are being told to proceed */ + return OCSD_RESP_WAIT; +} + +static void +cs_etm_decoder__reset_timestamp(struct cs_etm_packet_queue *packet_queue) +{ + packet_queue->timestamp = 0; + packet_queue->next_timestamp = 0; + packet_queue->instr_count = 0; +} + +static ocsd_datapath_resp_t +cs_etm_decoder__buffer_packet(struct cs_etm_packet_queue *packet_queue, + const u8 trace_chan_id, + enum cs_etm_sample_type sample_type) +{ + u32 et = 0; + int cpu; + + if (packet_queue->packet_count >= CS_ETM_PACKET_MAX_BUFFER - 1) + return OCSD_RESP_FATAL_SYS_ERR; + + if (cs_etm__get_cpu(trace_chan_id, &cpu) < 0) + return OCSD_RESP_FATAL_SYS_ERR; + + et = packet_queue->tail; + et = (et + 1) & (CS_ETM_PACKET_MAX_BUFFER - 1); + packet_queue->tail = et; + packet_queue->packet_count++; + + packet_queue->packet_buffer[et].sample_type = sample_type; + packet_queue->packet_buffer[et].isa = CS_ETM_ISA_UNKNOWN; + packet_queue->packet_buffer[et].cpu = cpu; + packet_queue->packet_buffer[et].start_addr = CS_ETM_INVAL_ADDR; + packet_queue->packet_buffer[et].end_addr = CS_ETM_INVAL_ADDR; + packet_queue->packet_buffer[et].instr_count = 0; + packet_queue->packet_buffer[et].last_instr_taken_branch = false; + packet_queue->packet_buffer[et].last_instr_size = 0; + packet_queue->packet_buffer[et].last_instr_type = 0; + packet_queue->packet_buffer[et].last_instr_subtype = 0; + packet_queue->packet_buffer[et].last_instr_cond = 0; + packet_queue->packet_buffer[et].flags = 0; + packet_queue->packet_buffer[et].exception_number = UINT32_MAX; + packet_queue->packet_buffer[et].trace_chan_id = trace_chan_id; + + if (packet_queue->packet_count == CS_ETM_PACKET_MAX_BUFFER - 1) + return OCSD_RESP_WAIT; + + return OCSD_RESP_CONT; +} + +static ocsd_datapath_resp_t +cs_etm_decoder__buffer_range(struct cs_etm_queue *etmq, + struct cs_etm_packet_queue *packet_queue, + const ocsd_generic_trace_elem *elem, + const uint8_t trace_chan_id) +{ + int ret = 0; + struct cs_etm_packet *packet; + + ret = cs_etm_decoder__buffer_packet(packet_queue, trace_chan_id, + CS_ETM_RANGE); + if (ret != OCSD_RESP_CONT && ret != OCSD_RESP_WAIT) + return ret; + + packet = &packet_queue->packet_buffer[packet_queue->tail]; + + switch (elem->isa) { + case ocsd_isa_aarch64: + packet->isa = CS_ETM_ISA_A64; + break; + case ocsd_isa_arm: + packet->isa = CS_ETM_ISA_A32; + break; + case ocsd_isa_thumb2: + packet->isa = CS_ETM_ISA_T32; + break; + case ocsd_isa_tee: + case ocsd_isa_jazelle: + case ocsd_isa_custom: + case ocsd_isa_unknown: + default: + packet->isa = CS_ETM_ISA_UNKNOWN; + } + + packet->start_addr = elem->st_addr; + packet->end_addr = elem->en_addr; + packet->instr_count = elem->num_instr_range; + packet->last_instr_type = elem->last_i_type; + packet->last_instr_subtype = elem->last_i_subtype; + packet->last_instr_cond = elem->last_instr_cond; + + switch (elem->last_i_type) { + case OCSD_INSTR_BR: + case OCSD_INSTR_BR_INDIRECT: + packet->last_instr_taken_branch = elem->last_instr_exec; + break; + case OCSD_INSTR_ISB: + case OCSD_INSTR_DSB_DMB: + case OCSD_INSTR_WFI_WFE: + case OCSD_INSTR_OTHER: + default: + packet->last_instr_taken_branch = false; + break; + } + + packet->last_instr_size = elem->last_instr_sz; + + /* per-thread scenario, no need to generate a timestamp */ + if (cs_etm__etmq_is_timeless(etmq)) + goto out; + + /* + * The packet queue is full and we haven't seen a timestamp (had we + * seen one the packet queue wouldn't be full). Let the front end + * deal with it. + */ + if (ret == OCSD_RESP_WAIT) + goto out; + + packet_queue->instr_count += elem->num_instr_range; + /* Tell the front end we have a new timestamp to process */ + ret = cs_etm_decoder__do_soft_timestamp(etmq, packet_queue, + trace_chan_id); +out: + return ret; +} + +static ocsd_datapath_resp_t +cs_etm_decoder__buffer_discontinuity(struct cs_etm_packet_queue *queue, + const uint8_t trace_chan_id) +{ + /* + * Something happened and who knows when we'll get new traces so + * reset time statistics. + */ + cs_etm_decoder__reset_timestamp(queue); + return cs_etm_decoder__buffer_packet(queue, trace_chan_id, + CS_ETM_DISCONTINUITY); +} + +static ocsd_datapath_resp_t +cs_etm_decoder__buffer_exception(struct cs_etm_packet_queue *queue, + const ocsd_generic_trace_elem *elem, + const uint8_t trace_chan_id) +{ int ret = 0; + struct cs_etm_packet *packet; + + ret = cs_etm_decoder__buffer_packet(queue, trace_chan_id, + CS_ETM_EXCEPTION); + if (ret != OCSD_RESP_CONT && ret != OCSD_RESP_WAIT) + return ret; + + packet = &queue->packet_buffer[queue->tail]; + packet->exception_number = elem->exception_number; + + return ret; +} + +static ocsd_datapath_resp_t +cs_etm_decoder__buffer_exception_ret(struct cs_etm_packet_queue *queue, + const uint8_t trace_chan_id) +{ + return cs_etm_decoder__buffer_packet(queue, trace_chan_id, + CS_ETM_EXCEPTION_RET); +} + +static ocsd_datapath_resp_t +cs_etm_decoder__set_tid(struct cs_etm_queue *etmq, + struct cs_etm_packet_queue *packet_queue, + const ocsd_generic_trace_elem *elem, + const uint8_t trace_chan_id) +{ + pid_t tid; + + /* Ignore PE_CONTEXT packets that don't have a valid contextID */ + if (!elem->context.ctxt_id_valid) + return OCSD_RESP_CONT; + + tid = elem->context.context_id; + if (cs_etm__etmq_set_tid(etmq, tid, trace_chan_id)) + return OCSD_RESP_FATAL_SYS_ERR; + + /* + * A timestamp is generated after a PE_CONTEXT element so make sure + * to rely on that coming one. + */ + cs_etm_decoder__reset_timestamp(packet_queue); + + return OCSD_RESP_CONT; +} + +static ocsd_datapath_resp_t cs_etm_decoder__gen_trace_elem_printer( + const void *context, + const ocsd_trc_index_t indx __maybe_unused, + const u8 trace_chan_id __maybe_unused, + const ocsd_generic_trace_elem *elem) +{ + ocsd_datapath_resp_t resp = OCSD_RESP_CONT; + struct cs_etm_decoder *decoder = (struct cs_etm_decoder *) context; + struct cs_etm_queue *etmq = decoder->data; + struct cs_etm_packet_queue *packet_queue; + + /* First get the packet queue for this traceID */ + packet_queue = cs_etm__etmq_get_packet_queue(etmq, trace_chan_id); + if (!packet_queue) + return OCSD_RESP_FATAL_SYS_ERR; + + switch (elem->elem_type) { + case OCSD_GEN_TRC_ELEM_UNKNOWN: + break; + case OCSD_GEN_TRC_ELEM_EO_TRACE: + case OCSD_GEN_TRC_ELEM_NO_SYNC: + case OCSD_GEN_TRC_ELEM_TRACE_ON: + resp = cs_etm_decoder__buffer_discontinuity(packet_queue, + trace_chan_id); + break; + case OCSD_GEN_TRC_ELEM_INSTR_RANGE: + resp = cs_etm_decoder__buffer_range(etmq, packet_queue, elem, + trace_chan_id); + break; + case OCSD_GEN_TRC_ELEM_EXCEPTION: + resp = cs_etm_decoder__buffer_exception(packet_queue, elem, + trace_chan_id); + break; + case OCSD_GEN_TRC_ELEM_EXCEPTION_RET: + resp = cs_etm_decoder__buffer_exception_ret(packet_queue, + trace_chan_id); + break; + case OCSD_GEN_TRC_ELEM_TIMESTAMP: + resp = cs_etm_decoder__do_hard_timestamp(etmq, elem, + trace_chan_id); + break; + case OCSD_GEN_TRC_ELEM_PE_CONTEXT: + resp = cs_etm_decoder__set_tid(etmq, packet_queue, + elem, trace_chan_id); + break; + /* Unused packet types */ + case OCSD_GEN_TRC_ELEM_I_RANGE_NOPATH: + case OCSD_GEN_TRC_ELEM_ADDR_NACC: + case OCSD_GEN_TRC_ELEM_CYCLE_COUNT: + case OCSD_GEN_TRC_ELEM_ADDR_UNKNOWN: + case OCSD_GEN_TRC_ELEM_EVENT: + case OCSD_GEN_TRC_ELEM_SWTRACE: + case OCSD_GEN_TRC_ELEM_CUSTOM: + default: + break; + } + + return resp; +} + +static int cs_etm_decoder__create_etm_packet_decoder( + struct cs_etm_trace_params *t_params, + struct cs_etm_decoder *decoder) +{ + const char *decoder_name; + ocsd_etmv3_cfg config_etmv3; + ocsd_etmv4_cfg trace_config_etmv4; + void *trace_config; + u8 csid; + + switch (t_params->protocol) { + case CS_ETM_PROTO_ETMV3: + case CS_ETM_PROTO_PTM: + cs_etm_decoder__gen_etmv3_config(t_params, &config_etmv3); + decoder_name = (t_params->protocol == CS_ETM_PROTO_ETMV3) ? + OCSD_BUILTIN_DCD_ETMV3 : + OCSD_BUILTIN_DCD_PTM; + trace_config = &config_etmv3; + break; + case CS_ETM_PROTO_ETMV4i: + cs_etm_decoder__gen_etmv4_config(t_params, &trace_config_etmv4); + decoder_name = OCSD_BUILTIN_DCD_ETMV4I; + trace_config = &trace_config_etmv4; + break; + default: + return -1; + } + + if (ocsd_dt_create_decoder(decoder->dcd_tree, + decoder_name, + OCSD_CREATE_FLG_FULL_DECODER, + trace_config, &csid)) + return -1; + + if (ocsd_dt_set_gen_elem_outfn(decoder->dcd_tree, + cs_etm_decoder__gen_trace_elem_printer, + decoder)) + return -1; + + return 0; +} + +static int +cs_etm_decoder__create_etm_decoder(struct cs_etm_decoder_params *d_params, + struct cs_etm_trace_params *t_params, + struct cs_etm_decoder *decoder) +{ + if (d_params->operation == CS_ETM_OPERATION_PRINT) + return cs_etm_decoder__create_etm_packet_printer(t_params, + decoder); + else if (d_params->operation == CS_ETM_OPERATION_DECODE) + return cs_etm_decoder__create_etm_packet_decoder(t_params, + decoder); + + return -1; +} + +struct cs_etm_decoder * +cs_etm_decoder__new(int num_cpu, struct cs_etm_decoder_params *d_params, + struct cs_etm_trace_params t_params[]) +{ + struct cs_etm_decoder *decoder; + ocsd_dcd_tree_src_t format; + u32 flags; + int i, ret; + + if ((!t_params) || (!d_params)) + return NULL; + + decoder = zalloc(sizeof(*decoder)); + + if (!decoder) + return NULL; + + decoder->data = d_params->data; + decoder->prev_return = OCSD_RESP_CONT; + format = (d_params->formatted ? OCSD_TRC_SRC_FRAME_FORMATTED : + OCSD_TRC_SRC_SINGLE); + flags = 0; + flags |= (d_params->fsyncs ? OCSD_DFRMTR_HAS_FSYNCS : 0); + flags |= (d_params->hsyncs ? OCSD_DFRMTR_HAS_HSYNCS : 0); + flags |= (d_params->frame_aligned ? OCSD_DFRMTR_FRAME_MEM_ALIGN : 0); + + /* + * Drivers may add barrier frames when used with perf, set up to + * handle this. Barriers const of FSYNC packet repeated 4 times. + */ + flags |= OCSD_DFRMTR_RESET_ON_4X_FSYNC; + + /* Create decode tree for the data source */ + decoder->dcd_tree = ocsd_create_dcd_tree(format, flags); + + if (decoder->dcd_tree == 0) + goto err_free_decoder; + + /* init library print logging support */ + ret = cs_etm_decoder__init_def_logger_printing(d_params, decoder); + if (ret != 0) + goto err_free_decoder; + + /* init raw frame logging if required */ + cs_etm_decoder__init_raw_frame_logging(d_params, decoder); + + for (i = 0; i < num_cpu; i++) { + ret = cs_etm_decoder__create_etm_decoder(d_params, + &t_params[i], + decoder); + if (ret != 0) + goto err_free_decoder; + } + + return decoder; + +err_free_decoder: + cs_etm_decoder__free(decoder); + return NULL; +} + +int cs_etm_decoder__process_data_block(struct cs_etm_decoder *decoder, + u64 indx, const u8 *buf, + size_t len, size_t *consumed) +{ + int ret = 0; + ocsd_datapath_resp_t cur = OCSD_RESP_CONT; + ocsd_datapath_resp_t prev_return = decoder->prev_return; + size_t processed = 0; + u32 count; + + while (processed < len) { + if (OCSD_DATA_RESP_IS_WAIT(prev_return)) { + cur = ocsd_dt_process_data(decoder->dcd_tree, + OCSD_OP_FLUSH, + 0, + 0, + NULL, + NULL); + } else if (OCSD_DATA_RESP_IS_CONT(prev_return)) { + cur = ocsd_dt_process_data(decoder->dcd_tree, + OCSD_OP_DATA, + indx + processed, + len - processed, + &buf[processed], + &count); + processed += count; + } else { + ret = -EINVAL; + break; + } + + /* + * Return to the input code if the packet buffer is full. + * Flushing will get done once the packet buffer has been + * processed. + */ + if (OCSD_DATA_RESP_IS_WAIT(cur)) + break; + + prev_return = cur; + } + + decoder->prev_return = cur; + *consumed = processed; + + return ret; +} + +void cs_etm_decoder__free(struct cs_etm_decoder *decoder) +{ + if (!decoder) + return; + + ocsd_destroy_dcd_tree(decoder->dcd_tree); + decoder->dcd_tree = NULL; + free(decoder); +} |