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 <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_RAW
24#define CS_LOG_RAW_FRAMES
25#ifdef CS_RAW_PACKED
26#define CS_RAW_DEBUG_FLAGS (OCSD_DFRMTR_UNPACKED_RAW_OUT | \
27 OCSD_DFRMTR_PACKED_RAW_OUT)
28#else
29#define CS_RAW_DEBUG_FLAGS (OCSD_DFRMTR_UNPACKED_RAW_OUT)
30#endif
31#endif
32
33/*
34 * Assume a maximum of 0.1ns elapsed per instruction. This would be the
35 * case with a theoretical 10GHz core executing 1 instruction per cycle.
36 * Used to estimate the sample time for synthesized instructions because
37 * Coresight only emits a timestamp for a range of instructions rather
38 * 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 u32
53cs_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 counter
108 * intuitive but it has the advantage of centralizing tail management
109 * at a single location. Because of that we need to follow the same
110 * heuristic with the head, i.e we increment it before using its
111 * value. Otherwise the first element of the packet queue is not
112 * 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 instructions
128 * 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 4
152#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 assume
159 * the architecture is ARCH_AA64 rather than just V8.
160 * ARCH_V8 = V8 architecture
161 * ARCH_AA64 = Min v8r3 plus additional AA64 PE features
162 */
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 int
209cs_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 printers
221 * (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 to
234 * 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_FRAMES
246static void
247cs_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 the
253 * raw frame printer we add later
254 */
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#else
273static void
274cs_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#endif
280
281static ocsd_datapath_resp_t
282cs_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(instr_count: &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_t
305cs_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. Assume
321 * 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, overwriting
334 * any previous estimate in cs_timestamp
335 */
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 an
345 * 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_STR
350 ". 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 not
356 * 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 traces
363 * or a discontinuity. Since timestamps packets are generated *after*
364 * range packets have been generated, we need to estimate the time at
365 * which instructions started by subtracting the number of instructions
366 * executed to the timestamp. Don't estimate earlier than the last used
367 * 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 void
384cs_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_t
391cs_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_t
432cs_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 else
475 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 we
485 * seen one the packet queue wouldn't be full). Let the front end
486 * 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_t
500cs_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 so
506 * reset time statistics.
507 */
508 cs_etm_decoder__reset_timestamp(packet_queue: queue);
509 return cs_etm_decoder__buffer_packet(etmq, queue, trace_chan_id,
510 CS_ETM_DISCONTINUITY);
511}
512
513static ocsd_datapath_resp_t
514cs_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_t
533cs_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_t
542cs_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_EL2
552 * 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 sure
577 * 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 ocsd_gen_trc_elem_t type;
592 struct cs_etm_decoder *decoder = (struct cs_etm_decoder *) context;
593 struct cs_etm_queue *etmq = decoder->data;
594 struct cs_etm_packet_queue *packet_queue;
595
596 /* First get the packet queue for this traceID */
597 packet_queue = cs_etm__etmq_get_packet_queue(etmq, trace_chan_id);
598 if (!packet_queue)
599 return OCSD_RESP_FATAL_SYS_ERR;
600
601 type = elem->elem_type;
602
603 if (type == OCSD_GEN_TRC_ELEM_EO_TRACE ||
604 type == OCSD_GEN_TRC_ELEM_NO_SYNC ||
605 type == OCSD_GEN_TRC_ELEM_TRACE_ON)
606 resp = cs_etm_decoder__buffer_discontinuity(etmq, packet_queue,
607 trace_chan_id);
608 else if (type == OCSD_GEN_TRC_ELEM_INSTR_RANGE)
609 resp = cs_etm_decoder__buffer_range(etmq, packet_queue, elem,
610 trace_chan_id);
611 else if (type == OCSD_GEN_TRC_ELEM_EXCEPTION)
612 resp = cs_etm_decoder__buffer_exception(etmq, packet_queue, elem,
613 trace_chan_id);
614 else if (type == OCSD_GEN_TRC_ELEM_EXCEPTION_RET)
615 resp = cs_etm_decoder__buffer_exception_ret(etmq, packet_queue,
616 trace_chan_id);
617 else if (type == OCSD_GEN_TRC_ELEM_TIMESTAMP)
618 resp = cs_etm_decoder__do_hard_timestamp(etmq, elem,
619 trace_chan_id,
620 indx);
621 else if (type == OCSD_GEN_TRC_ELEM_PE_CONTEXT)
622 resp = cs_etm_decoder__set_tid(etmq, packet_queue,
623 elem, trace_chan_id);
624
625 return resp;
626}
627
628static int
629cs_etm_decoder__create_etm_decoder(struct cs_etm_decoder_params *d_params,
630 struct cs_etm_trace_params *t_params,
631 struct cs_etm_decoder *decoder)
632{
633 ocsd_etmv3_cfg config_etmv3;
634 ocsd_etmv4_cfg trace_config_etmv4;
635 ocsd_ete_cfg trace_config_ete;
636 void *trace_config;
637 u8 csid;
638
639 switch (t_params->protocol) {
640 case CS_ETM_PROTO_ETMV3:
641 case CS_ETM_PROTO_PTM:
642 csid = (t_params->etmv3.reg_idr & CORESIGHT_TRACE_ID_VAL_MASK);
643 cs_etm_decoder__gen_etmv3_config(t_params, &config_etmv3);
644 decoder->decoder_name = (t_params->protocol == CS_ETM_PROTO_ETMV3) ?
645 OCSD_BUILTIN_DCD_ETMV3 :
646 OCSD_BUILTIN_DCD_PTM;
647 trace_config = &config_etmv3;
648 break;
649 case CS_ETM_PROTO_ETMV4i:
650 csid = (t_params->etmv4.reg_traceidr & CORESIGHT_TRACE_ID_VAL_MASK);
651 cs_etm_decoder__gen_etmv4_config(t_params, &trace_config_etmv4);
652 decoder->decoder_name = OCSD_BUILTIN_DCD_ETMV4I;
653 trace_config = &trace_config_etmv4;
654 break;
655 case CS_ETM_PROTO_ETE:
656 csid = (t_params->ete.reg_traceidr & CORESIGHT_TRACE_ID_VAL_MASK);
657 cs_etm_decoder__gen_ete_config(t_params, &trace_config_ete);
658 decoder->decoder_name = OCSD_BUILTIN_DCD_ETE;
659 trace_config = &trace_config_ete;
660 break;
661 default:
662 return -1;
663 }
664
665 if (d_params->operation == CS_ETM_OPERATION_DECODE) {
666 int decode_flags = OCSD_CREATE_FLG_FULL_DECODER;
667#ifdef OCSD_OPFLG_N_UNCOND_DIR_BR_CHK
668 decode_flags |= OCSD_OPFLG_N_UNCOND_DIR_BR_CHK | OCSD_OPFLG_CHK_RANGE_CONTINUE |
669 ETM4_OPFLG_PKTDEC_AA64_OPCODE_CHK;
670#endif
671 if (ocsd_dt_create_decoder(decoder->dcd_tree,
672 decoder->decoder_name,
673 decode_flags,
674 trace_config, &csid))
675 return -1;
676
677 if (ocsd_dt_set_gen_elem_outfn(decoder->dcd_tree,
678 cs_etm_decoder__gen_trace_elem_printer,
679 decoder))
680 return -1;
681
682 return 0;
683 } else if (d_params->operation == CS_ETM_OPERATION_PRINT) {
684 if (ocsd_dt_create_decoder(decoder->dcd_tree, decoder->decoder_name,
685 OCSD_CREATE_FLG_PACKET_PROC,
686 trace_config, &csid))
687 return -1;
688
689 if (ocsd_dt_set_pkt_protocol_printer(decoder->dcd_tree, csid, 0))
690 return -1;
691
692 return 0;
693 }
694
695 return -1;
696}
697
698struct cs_etm_decoder *
699cs_etm_decoder__new(int decoders, struct cs_etm_decoder_params *d_params,
700 struct cs_etm_trace_params t_params[])
701{
702 struct cs_etm_decoder *decoder;
703 ocsd_dcd_tree_src_t format;
704 u32 flags;
705 int i, ret;
706
707 if ((!t_params) || (!d_params))
708 return NULL;
709
710 decoder = zalloc(sizeof(*decoder));
711
712 if (!decoder)
713 return NULL;
714
715 decoder->data = d_params->data;
716 decoder->prev_return = OCSD_RESP_CONT;
717 format = (d_params->formatted ? OCSD_TRC_SRC_FRAME_FORMATTED :
718 OCSD_TRC_SRC_SINGLE);
719 flags = 0;
720 flags |= (d_params->fsyncs ? OCSD_DFRMTR_HAS_FSYNCS : 0);
721 flags |= (d_params->hsyncs ? OCSD_DFRMTR_HAS_HSYNCS : 0);
722 flags |= (d_params->frame_aligned ? OCSD_DFRMTR_FRAME_MEM_ALIGN : 0);
723
724 /*
725 * Drivers may add barrier frames when used with perf, set up to
726 * handle this. Barriers const of FSYNC packet repeated 4 times.
727 */
728 flags |= OCSD_DFRMTR_RESET_ON_4X_FSYNC;
729
730 /* Create decode tree for the data source */
731 decoder->dcd_tree = ocsd_create_dcd_tree(format, flags);
732
733 if (decoder->dcd_tree == 0)
734 goto err_free_decoder;
735
736 /* init library print logging support */
737 ret = cs_etm_decoder__init_def_logger_printing(d_params, decoder);
738 if (ret != 0)
739 goto err_free_decoder;
740
741 /* init raw frame logging if required */
742 cs_etm_decoder__init_raw_frame_logging(d_params, decoder);
743
744 for (i = 0; i < decoders; i++) {
745 ret = cs_etm_decoder__create_etm_decoder(d_params,
746 t_params: &t_params[i],
747 decoder);
748 if (ret != 0)
749 goto err_free_decoder;
750 }
751
752 return decoder;
753
754err_free_decoder:
755 cs_etm_decoder__free(decoder);
756 return NULL;
757}
758
759int cs_etm_decoder__process_data_block(struct cs_etm_decoder *decoder,
760 u64 indx, const u8 *buf,
761 size_t len, size_t *consumed)
762{
763 int ret = 0;
764 ocsd_datapath_resp_t cur = OCSD_RESP_CONT;
765 ocsd_datapath_resp_t prev_return = decoder->prev_return;
766 size_t processed = 0;
767 u32 count;
768
769 while (processed < len) {
770 if (OCSD_DATA_RESP_IS_WAIT(prev_return)) {
771 cur = ocsd_dt_process_data(decoder->dcd_tree,
772 OCSD_OP_FLUSH,
773 0,
774 0,
775 NULL,
776 NULL);
777 } else if (OCSD_DATA_RESP_IS_CONT(prev_return)) {
778 cur = ocsd_dt_process_data(decoder->dcd_tree,
779 OCSD_OP_DATA,
780 indx + processed,
781 len - processed,
782 &buf[processed],
783 &count);
784 processed += count;
785 } else {
786 ret = -EINVAL;
787 break;
788 }
789
790 /*
791 * Return to the input code if the packet buffer is full.
792 * Flushing will get done once the packet buffer has been
793 * processed.
794 */
795 if (OCSD_DATA_RESP_IS_WAIT(cur))
796 break;
797
798 prev_return = cur;
799 }
800
801 decoder->prev_return = cur;
802 *consumed = processed;
803
804 return ret;
805}
806
807void cs_etm_decoder__free(struct cs_etm_decoder *decoder)
808{
809 if (!decoder)
810 return;
811
812 ocsd_destroy_dcd_tree(decoder->dcd_tree);
813 decoder->dcd_tree = NULL;
814 free(decoder);
815}
816
817const char *cs_etm_decoder__get_name(struct cs_etm_decoder *decoder)
818{
819 return decoder->decoder_name;
820}
821

source code of linux/tools/perf/util/cs-etm-decoder/cs-etm-decoder.c