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1/*
2 * Intel SOC Telemetry Platform Driver: Currently supports APL
3 * Copyright (c) 2015, Intel Corporation.
4 * All Rights Reserved.
5 *
6 * This program is free software; you can redistribute it and/or modify it
7 * under the terms and conditions of the GNU General Public License,
8 * version 2, as published by the Free Software Foundation.
9 *
10 * This program is distributed in the hope it will be useful, but WITHOUT
11 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
12 * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for
13 * more details.
14 *
15 * This file provides the platform specific telemetry implementation for APL.
16 * It used the PUNIT and PMC IPC interfaces for configuring the counters.
17 * The accumulated results are fetched from SRAM.
18 */
19#include <linux/module.h>
20#include <linux/init.h>
21#include <linux/device.h>
22#include <linux/debugfs.h>
23#include <linux/seq_file.h>
24#include <linux/io.h>
25#include <linux/uaccess.h>
26#include <linux/pci.h>
27#include <linux/suspend.h>
28#include <linux/platform_device.h>
29
30#include <asm/cpu_device_id.h>
31#include <asm/intel_pmc_ipc.h>
32#include <asm/intel_punit_ipc.h>
33#include <asm/intel_telemetry.h>
34
35#define DRIVER_NAME "intel_telemetry"
36#define DRIVER_VERSION "1.0.0"
37
38#define TELEM_TRC_VERBOSITY_MASK 0x3
39
40#define TELEM_MIN_PERIOD(x) ((x) & 0x7F0000)
41#define TELEM_MAX_PERIOD(x) ((x) & 0x7F000000)
42#define TELEM_SAMPLE_PERIOD_INVALID(x) ((x) & (BIT(7)))
43#define TELEM_CLEAR_SAMPLE_PERIOD(x) ((x) &= ~0x7F)
44
45#define TELEM_SAMPLING_DEFAULT_PERIOD 0xD
46
47#define TELEM_MAX_EVENTS_SRAM 28
48#define TELEM_MAX_OS_ALLOCATED_EVENTS 20
49#define TELEM_SSRAM_STARTTIME_OFFSET 8
50#define TELEM_SSRAM_EVTLOG_OFFSET 16
51
52#define IOSS_TELEM_EVENT_READ 0x0
53#define IOSS_TELEM_EVENT_WRITE 0x1
54#define IOSS_TELEM_INFO_READ 0x2
55#define IOSS_TELEM_TRACE_CTL_READ 0x5
56#define IOSS_TELEM_TRACE_CTL_WRITE 0x6
57#define IOSS_TELEM_EVENT_CTL_READ 0x7
58#define IOSS_TELEM_EVENT_CTL_WRITE 0x8
59#define IOSS_TELEM_EVT_CTRL_WRITE_SIZE 0x4
60#define IOSS_TELEM_READ_WORD 0x1
61#define IOSS_TELEM_WRITE_FOURBYTES 0x4
62#define IOSS_TELEM_EVT_WRITE_SIZE 0x3
63
64#define TELEM_INFO_SRAMEVTS_MASK 0xFF00
65#define TELEM_INFO_SRAMEVTS_SHIFT 0x8
66#define TELEM_SSRAM_READ_TIMEOUT 10
67
68#define TELEM_INFO_NENABLES_MASK 0xFF
69#define TELEM_EVENT_ENABLE 0x8000
70
71#define TELEM_MASK_BIT 1
72#define TELEM_MASK_BYTE 0xFF
73#define BYTES_PER_LONG 8
74#define TELEM_MASK_PCS_STATE 0xF
75
76#define TELEM_DISABLE(x) ((x) &= ~(BIT(31)))
77#define TELEM_CLEAR_EVENTS(x) ((x) |= (BIT(30)))
78#define TELEM_ENABLE_SRAM_EVT_TRACE(x) ((x) &= ~(BIT(30) | BIT(24)))
79#define TELEM_ENABLE_PERIODIC(x) ((x) |= (BIT(23) | BIT(31) | BIT(7)))
80#define TELEM_EXTRACT_VERBOSITY(x, y) ((y) = (((x) >> 27) & 0x3))
81#define TELEM_CLEAR_VERBOSITY_BITS(x) ((x) &= ~(BIT(27) | BIT(28)))
82#define TELEM_SET_VERBOSITY_BITS(x, y) ((x) |= ((y) << 27))
83
84#define TELEM_CPU(model, data) \
85 { X86_VENDOR_INTEL, 6, model, X86_FEATURE_MWAIT, (unsigned long)&data }
86
87enum telemetry_action {
88 TELEM_UPDATE = 0,
89 TELEM_ADD,
90 TELEM_RESET,
91 TELEM_ACTION_NONE
92};
93
94struct telem_ssram_region {
95 u64 timestamp;
96 u64 start_time;
97 u64 events[TELEM_MAX_EVENTS_SRAM];
98};
99
100static struct telemetry_plt_config *telm_conf;
101
102/*
103 * The following counters are programmed by default during setup.
104 * Only 20 allocated to kernel driver
105 */
106static struct telemetry_evtmap
107 telemetry_apl_ioss_default_events[TELEM_MAX_OS_ALLOCATED_EVENTS] = {
108 {"SOC_S0IX_TOTAL_RES", 0x4800},
109 {"SOC_S0IX_TOTAL_OCC", 0x4000},
110 {"SOC_S0IX_SHALLOW_RES", 0x4801},
111 {"SOC_S0IX_SHALLOW_OCC", 0x4001},
112 {"SOC_S0IX_DEEP_RES", 0x4802},
113 {"SOC_S0IX_DEEP_OCC", 0x4002},
114 {"PMC_POWER_GATE", 0x5818},
115 {"PMC_D3_STATES", 0x5819},
116 {"PMC_D0I3_STATES", 0x581A},
117 {"PMC_S0IX_WAKE_REASON_GPIO", 0x6000},
118 {"PMC_S0IX_WAKE_REASON_TIMER", 0x6001},
119 {"PMC_S0IX_WAKE_REASON_VNNREQ", 0x6002},
120 {"PMC_S0IX_WAKE_REASON_LOWPOWER", 0x6003},
121 {"PMC_S0IX_WAKE_REASON_EXTERNAL", 0x6004},
122 {"PMC_S0IX_WAKE_REASON_MISC", 0x6005},
123 {"PMC_S0IX_BLOCKING_IPS_D3_D0I3", 0x6006},
124 {"PMC_S0IX_BLOCKING_IPS_PG", 0x6007},
125 {"PMC_S0IX_BLOCKING_MISC_IPS_PG", 0x6008},
126 {"PMC_S0IX_BLOCK_IPS_VNN_REQ", 0x6009},
127 {"PMC_S0IX_BLOCK_IPS_CLOCKS", 0x600B},
128};
129
130
131static struct telemetry_evtmap
132 telemetry_apl_pss_default_events[TELEM_MAX_OS_ALLOCATED_EVENTS] = {
133 {"IA_CORE0_C6_RES", 0x0400},
134 {"IA_CORE0_C6_CTR", 0x0000},
135 {"IA_MODULE0_C7_RES", 0x0410},
136 {"IA_MODULE0_C7_CTR", 0x000E},
137 {"IA_C0_RES", 0x0805},
138 {"PCS_LTR", 0x2801},
139 {"PSTATES", 0x2802},
140 {"SOC_S0I3_RES", 0x0409},
141 {"SOC_S0I3_CTR", 0x000A},
142 {"PCS_S0I3_CTR", 0x0009},
143 {"PCS_C1E_RES", 0x041A},
144 {"PCS_IDLE_STATUS", 0x2806},
145 {"IA_PERF_LIMITS", 0x280B},
146 {"GT_PERF_LIMITS", 0x280C},
147 {"PCS_WAKEUP_S0IX_CTR", 0x0030},
148 {"PCS_IDLE_BLOCKED", 0x2C00},
149 {"PCS_S0IX_BLOCKED", 0x2C01},
150 {"PCS_S0IX_WAKE_REASONS", 0x2C02},
151 {"PCS_LTR_BLOCKING", 0x2C03},
152 {"PC2_AND_MEM_SHALLOW_IDLE_RES", 0x1D40},
153};
154
155/* APL specific Data */
156static struct telemetry_plt_config telem_apl_config = {
157 .pss_config = {
158 .telem_evts = telemetry_apl_pss_default_events,
159 },
160 .ioss_config = {
161 .telem_evts = telemetry_apl_ioss_default_events,
162 },
163};
164
165static const struct x86_cpu_id telemetry_cpu_ids[] = {
166 TELEM_CPU(0x5c, telem_apl_config),
167 {}
168};
169
170MODULE_DEVICE_TABLE(x86cpu, telemetry_cpu_ids);
171
172static inline int telem_get_unitconfig(enum telemetry_unit telem_unit,
173 struct telemetry_unit_config **unit_config)
174{
175 if (telem_unit == TELEM_PSS)
176 *unit_config = &(telm_conf->pss_config);
177 else if (telem_unit == TELEM_IOSS)
178 *unit_config = &(telm_conf->ioss_config);
179 else
180 return -EINVAL;
181
182 return 0;
183
184}
185
186static int telemetry_check_evtid(enum telemetry_unit telem_unit,
187 u32 *evtmap, u8 len,
188 enum telemetry_action action)
189{
190 struct telemetry_unit_config *unit_config;
191 int ret;
192
193 ret = telem_get_unitconfig(telem_unit, &unit_config);
194 if (ret < 0)
195 return ret;
196
197 switch (action) {
198 case TELEM_RESET:
199 if (len > TELEM_MAX_EVENTS_SRAM)
200 return -EINVAL;
201
202 break;
203
204 case TELEM_UPDATE:
205 if (len > TELEM_MAX_EVENTS_SRAM)
206 return -EINVAL;
207
208 if ((len > 0) && (evtmap == NULL))
209 return -EINVAL;
210
211 break;
212
213 case TELEM_ADD:
214 if ((len + unit_config->ssram_evts_used) >
215 TELEM_MAX_EVENTS_SRAM)
216 return -EINVAL;
217
218 if ((len > 0) && (evtmap == NULL))
219 return -EINVAL;
220
221 break;
222
223 default:
224 pr_err("Unknown Telemetry action Specified %d\n", action);
225 return -EINVAL;
226 }
227
228 return 0;
229}
230
231
232static inline int telemetry_plt_config_ioss_event(u32 evt_id, int index)
233{
234 u32 write_buf;
235 int ret;
236
237 write_buf = evt_id | TELEM_EVENT_ENABLE;
238 write_buf <<= BITS_PER_BYTE;
239 write_buf |= index;
240
241 ret = intel_pmc_ipc_command(PMC_IPC_PMC_TELEMTRY,
242 IOSS_TELEM_EVENT_WRITE, (u8 *)&write_buf,
243 IOSS_TELEM_EVT_WRITE_SIZE, NULL, 0);
244
245 return ret;
246}
247
248static inline int telemetry_plt_config_pss_event(u32 evt_id, int index)
249{
250 u32 write_buf;
251 int ret;
252
253 write_buf = evt_id | TELEM_EVENT_ENABLE;
254 ret = intel_punit_ipc_command(IPC_PUNIT_BIOS_WRITE_TELE_EVENT,
255 index, 0, &write_buf, NULL);
256
257 return ret;
258}
259
260static int telemetry_setup_iossevtconfig(struct telemetry_evtconfig evtconfig,
261 enum telemetry_action action)
262{
263 u8 num_ioss_evts, ioss_period;
264 int ret, index, idx;
265 u32 *ioss_evtmap;
266 u32 telem_ctrl;
267
268 num_ioss_evts = evtconfig.num_evts;
269 ioss_period = evtconfig.period;
270 ioss_evtmap = evtconfig.evtmap;
271
272 /* Get telemetry EVENT CTL */
273 ret = intel_pmc_ipc_command(PMC_IPC_PMC_TELEMTRY,
274 IOSS_TELEM_EVENT_CTL_READ, NULL, 0,
275 &telem_ctrl, IOSS_TELEM_READ_WORD);
276 if (ret) {
277 pr_err("IOSS TELEM_CTRL Read Failed\n");
278 return ret;
279 }
280
281 /* Disable Telemetry */
282 TELEM_DISABLE(telem_ctrl);
283
284 ret = intel_pmc_ipc_command(PMC_IPC_PMC_TELEMTRY,
285 IOSS_TELEM_EVENT_CTL_WRITE,
286 (u8 *)&telem_ctrl,
287 IOSS_TELEM_EVT_CTRL_WRITE_SIZE,
288 NULL, 0);
289 if (ret) {
290 pr_err("IOSS TELEM_CTRL Event Disable Write Failed\n");
291 return ret;
292 }
293
294
295 /* Reset Everything */
296 if (action == TELEM_RESET) {
297 /* Clear All Events */
298 TELEM_CLEAR_EVENTS(telem_ctrl);
299
300 ret = intel_pmc_ipc_command(PMC_IPC_PMC_TELEMTRY,
301 IOSS_TELEM_EVENT_CTL_WRITE,
302 (u8 *)&telem_ctrl,
303 IOSS_TELEM_EVT_CTRL_WRITE_SIZE,
304 NULL, 0);
305 if (ret) {
306 pr_err("IOSS TELEM_CTRL Event Disable Write Failed\n");
307 return ret;
308 }
309 telm_conf->ioss_config.ssram_evts_used = 0;
310
311 /* Configure Events */
312 for (idx = 0; idx < num_ioss_evts; idx++) {
313 if (telemetry_plt_config_ioss_event(
314 telm_conf->ioss_config.telem_evts[idx].evt_id,
315 idx)) {
316 pr_err("IOSS TELEM_RESET Fail for data: %x\n",
317 telm_conf->ioss_config.telem_evts[idx].evt_id);
318 continue;
319 }
320 telm_conf->ioss_config.ssram_evts_used++;
321 }
322 }
323
324 /* Re-Configure Everything */
325 if (action == TELEM_UPDATE) {
326 /* Clear All Events */
327 TELEM_CLEAR_EVENTS(telem_ctrl);
328
329 ret = intel_pmc_ipc_command(PMC_IPC_PMC_TELEMTRY,
330 IOSS_TELEM_EVENT_CTL_WRITE,
331 (u8 *)&telem_ctrl,
332 IOSS_TELEM_EVT_CTRL_WRITE_SIZE,
333 NULL, 0);
334 if (ret) {
335 pr_err("IOSS TELEM_CTRL Event Disable Write Failed\n");
336 return ret;
337 }
338 telm_conf->ioss_config.ssram_evts_used = 0;
339
340 /* Configure Events */
341 for (index = 0; index < num_ioss_evts; index++) {
342 telm_conf->ioss_config.telem_evts[index].evt_id =
343 ioss_evtmap[index];
344
345 if (telemetry_plt_config_ioss_event(
346 telm_conf->ioss_config.telem_evts[index].evt_id,
347 index)) {
348 pr_err("IOSS TELEM_UPDATE Fail for Evt%x\n",
349 ioss_evtmap[index]);
350 continue;
351 }
352 telm_conf->ioss_config.ssram_evts_used++;
353 }
354 }
355
356 /* Add some Events */
357 if (action == TELEM_ADD) {
358 /* Configure Events */
359 for (index = telm_conf->ioss_config.ssram_evts_used, idx = 0;
360 idx < num_ioss_evts; index++, idx++) {
361 telm_conf->ioss_config.telem_evts[index].evt_id =
362 ioss_evtmap[idx];
363
364 if (telemetry_plt_config_ioss_event(
365 telm_conf->ioss_config.telem_evts[index].evt_id,
366 index)) {
367 pr_err("IOSS TELEM_ADD Fail for Event %x\n",
368 ioss_evtmap[idx]);
369 continue;
370 }
371 telm_conf->ioss_config.ssram_evts_used++;
372 }
373 }
374
375 /* Enable Periodic Telemetry Events and enable SRAM trace */
376 TELEM_CLEAR_SAMPLE_PERIOD(telem_ctrl);
377 TELEM_ENABLE_SRAM_EVT_TRACE(telem_ctrl);
378 TELEM_ENABLE_PERIODIC(telem_ctrl);
379 telem_ctrl |= ioss_period;
380
381 ret = intel_pmc_ipc_command(PMC_IPC_PMC_TELEMTRY,
382 IOSS_TELEM_EVENT_CTL_WRITE,
383 (u8 *)&telem_ctrl,
384 IOSS_TELEM_EVT_CTRL_WRITE_SIZE, NULL, 0);
385 if (ret) {
386 pr_err("IOSS TELEM_CTRL Event Enable Write Failed\n");
387 return ret;
388 }
389
390 telm_conf->ioss_config.curr_period = ioss_period;
391
392 return 0;
393}
394
395
396static int telemetry_setup_pssevtconfig(struct telemetry_evtconfig evtconfig,
397 enum telemetry_action action)
398{
399 u8 num_pss_evts, pss_period;
400 int ret, index, idx;
401 u32 *pss_evtmap;
402 u32 telem_ctrl;
403
404 num_pss_evts = evtconfig.num_evts;
405 pss_period = evtconfig.period;
406 pss_evtmap = evtconfig.evtmap;
407
408 /* PSS Config */
409 /* Get telemetry EVENT CTL */
410 ret = intel_punit_ipc_command(IPC_PUNIT_BIOS_READ_TELE_EVENT_CTRL,
411 0, 0, NULL, &telem_ctrl);
412 if (ret) {
413 pr_err("PSS TELEM_CTRL Read Failed\n");
414 return ret;
415 }
416
417 /* Disable Telemetry */
418 TELEM_DISABLE(telem_ctrl);
419 ret = intel_punit_ipc_command(IPC_PUNIT_BIOS_WRITE_TELE_EVENT_CTRL,
420 0, 0, &telem_ctrl, NULL);
421 if (ret) {
422 pr_err("PSS TELEM_CTRL Event Disable Write Failed\n");
423 return ret;
424 }
425
426 /* Reset Everything */
427 if (action == TELEM_RESET) {
428 /* Clear All Events */
429 TELEM_CLEAR_EVENTS(telem_ctrl);
430
431 ret = intel_punit_ipc_command(
432 IPC_PUNIT_BIOS_WRITE_TELE_EVENT_CTRL,
433 0, 0, &telem_ctrl, NULL);
434 if (ret) {
435 pr_err("PSS TELEM_CTRL Event Disable Write Failed\n");
436 return ret;
437 }
438 telm_conf->pss_config.ssram_evts_used = 0;
439 /* Configure Events */
440 for (idx = 0; idx < num_pss_evts; idx++) {
441 if (telemetry_plt_config_pss_event(
442 telm_conf->pss_config.telem_evts[idx].evt_id,
443 idx)) {
444 pr_err("PSS TELEM_RESET Fail for Event %x\n",
445 telm_conf->pss_config.telem_evts[idx].evt_id);
446 continue;
447 }
448 telm_conf->pss_config.ssram_evts_used++;
449 }
450 }
451
452 /* Re-Configure Everything */
453 if (action == TELEM_UPDATE) {
454 /* Clear All Events */
455 TELEM_CLEAR_EVENTS(telem_ctrl);
456
457 ret = intel_punit_ipc_command(
458 IPC_PUNIT_BIOS_WRITE_TELE_EVENT_CTRL,
459 0, 0, &telem_ctrl, NULL);
460 if (ret) {
461 pr_err("PSS TELEM_CTRL Event Disable Write Failed\n");
462 return ret;
463 }
464 telm_conf->pss_config.ssram_evts_used = 0;
465
466 /* Configure Events */
467 for (index = 0; index < num_pss_evts; index++) {
468 telm_conf->pss_config.telem_evts[index].evt_id =
469 pss_evtmap[index];
470
471 if (telemetry_plt_config_pss_event(
472 telm_conf->pss_config.telem_evts[index].evt_id,
473 index)) {
474 pr_err("PSS TELEM_UPDATE Fail for Event %x\n",
475 pss_evtmap[index]);
476 continue;
477 }
478 telm_conf->pss_config.ssram_evts_used++;
479 }
480 }
481
482 /* Add some Events */
483 if (action == TELEM_ADD) {
484 /* Configure Events */
485 for (index = telm_conf->pss_config.ssram_evts_used, idx = 0;
486 idx < num_pss_evts; index++, idx++) {
487
488 telm_conf->pss_config.telem_evts[index].evt_id =
489 pss_evtmap[idx];
490
491 if (telemetry_plt_config_pss_event(
492 telm_conf->pss_config.telem_evts[index].evt_id,
493 index)) {
494 pr_err("PSS TELEM_ADD Fail for Event %x\n",
495 pss_evtmap[idx]);
496 continue;
497 }
498 telm_conf->pss_config.ssram_evts_used++;
499 }
500 }
501
502 /* Enable Periodic Telemetry Events and enable SRAM trace */
503 TELEM_CLEAR_SAMPLE_PERIOD(telem_ctrl);
504 TELEM_ENABLE_SRAM_EVT_TRACE(telem_ctrl);
505 TELEM_ENABLE_PERIODIC(telem_ctrl);
506 telem_ctrl |= pss_period;
507
508 ret = intel_punit_ipc_command(IPC_PUNIT_BIOS_WRITE_TELE_EVENT_CTRL,
509 0, 0, &telem_ctrl, NULL);
510 if (ret) {
511 pr_err("PSS TELEM_CTRL Event Enable Write Failed\n");
512 return ret;
513 }
514
515 telm_conf->pss_config.curr_period = pss_period;
516
517 return 0;
518}
519
520static int telemetry_setup_evtconfig(struct telemetry_evtconfig pss_evtconfig,
521 struct telemetry_evtconfig ioss_evtconfig,
522 enum telemetry_action action)
523{
524 int ret;
525
526 mutex_lock(&(telm_conf->telem_lock));
527
528 if ((action == TELEM_UPDATE) && (telm_conf->telem_in_use)) {
529 ret = -EBUSY;
530 goto out;
531 }
532
533 ret = telemetry_check_evtid(TELEM_PSS, pss_evtconfig.evtmap,
534 pss_evtconfig.num_evts, action);
535 if (ret)
536 goto out;
537
538 ret = telemetry_check_evtid(TELEM_IOSS, ioss_evtconfig.evtmap,
539 ioss_evtconfig.num_evts, action);
540 if (ret)
541 goto out;
542
543 if (ioss_evtconfig.num_evts) {
544 ret = telemetry_setup_iossevtconfig(ioss_evtconfig, action);
545 if (ret)
546 goto out;
547 }
548
549 if (pss_evtconfig.num_evts) {
550 ret = telemetry_setup_pssevtconfig(pss_evtconfig, action);
551 if (ret)
552 goto out;
553 }
554
555 if ((action == TELEM_UPDATE) || (action == TELEM_ADD))
556 telm_conf->telem_in_use = true;
557 else
558 telm_conf->telem_in_use = false;
559
560out:
561 mutex_unlock(&(telm_conf->telem_lock));
562 return ret;
563}
564
565static int telemetry_setup(struct platform_device *pdev)
566{
567 struct telemetry_evtconfig pss_evtconfig, ioss_evtconfig;
568 u32 read_buf, events, event_regs;
569 int ret;
570
571 ret = intel_pmc_ipc_command(PMC_IPC_PMC_TELEMTRY, IOSS_TELEM_INFO_READ,
572 NULL, 0, &read_buf, IOSS_TELEM_READ_WORD);
573 if (ret) {
574 dev_err(&pdev->dev, "IOSS TELEM_INFO Read Failed\n");
575 return ret;
576 }
577
578 /* Get telemetry Info */
579 events = (read_buf & TELEM_INFO_SRAMEVTS_MASK) >>
580 TELEM_INFO_SRAMEVTS_SHIFT;
581 event_regs = read_buf & TELEM_INFO_NENABLES_MASK;
582 if ((events < TELEM_MAX_EVENTS_SRAM) ||
583 (event_regs < TELEM_MAX_EVENTS_SRAM)) {
584 dev_err(&pdev->dev, "IOSS:Insufficient Space for SRAM Trace\n");
585 dev_err(&pdev->dev, "SRAM Events %d; Event Regs %d\n",
586 events, event_regs);
587 return -ENOMEM;
588 }
589
590 telm_conf->ioss_config.min_period = TELEM_MIN_PERIOD(read_buf);
591 telm_conf->ioss_config.max_period = TELEM_MAX_PERIOD(read_buf);
592
593 /* PUNIT Mailbox Setup */
594 ret = intel_punit_ipc_command(IPC_PUNIT_BIOS_READ_TELE_INFO, 0, 0,
595 NULL, &read_buf);
596 if (ret) {
597 dev_err(&pdev->dev, "PSS TELEM_INFO Read Failed\n");
598 return ret;
599 }
600
601 /* Get telemetry Info */
602 events = (read_buf & TELEM_INFO_SRAMEVTS_MASK) >>
603 TELEM_INFO_SRAMEVTS_SHIFT;
604 event_regs = read_buf & TELEM_INFO_SRAMEVTS_MASK;
605 if ((events < TELEM_MAX_EVENTS_SRAM) ||
606 (event_regs < TELEM_MAX_EVENTS_SRAM)) {
607 dev_err(&pdev->dev, "PSS:Insufficient Space for SRAM Trace\n");
608 dev_err(&pdev->dev, "SRAM Events %d; Event Regs %d\n",
609 events, event_regs);
610 return -ENOMEM;
611 }
612
613 telm_conf->pss_config.min_period = TELEM_MIN_PERIOD(read_buf);
614 telm_conf->pss_config.max_period = TELEM_MAX_PERIOD(read_buf);
615
616 pss_evtconfig.evtmap = NULL;
617 pss_evtconfig.num_evts = TELEM_MAX_OS_ALLOCATED_EVENTS;
618 pss_evtconfig.period = TELEM_SAMPLING_DEFAULT_PERIOD;
619
620 ioss_evtconfig.evtmap = NULL;
621 ioss_evtconfig.num_evts = TELEM_MAX_OS_ALLOCATED_EVENTS;
622 ioss_evtconfig.period = TELEM_SAMPLING_DEFAULT_PERIOD;
623
624 ret = telemetry_setup_evtconfig(pss_evtconfig, ioss_evtconfig,
625 TELEM_RESET);
626 if (ret) {
627 dev_err(&pdev->dev, "TELEMTRY Setup Failed\n");
628 return ret;
629 }
630 return 0;
631}
632
633static int telemetry_plt_update_events(struct telemetry_evtconfig pss_evtconfig,
634 struct telemetry_evtconfig ioss_evtconfig)
635{
636 int ret;
637
638 if ((pss_evtconfig.num_evts > 0) &&
639 (TELEM_SAMPLE_PERIOD_INVALID(pss_evtconfig.period))) {
640 pr_err("PSS Sampling Period Out of Range\n");
641 return -EINVAL;
642 }
643
644 if ((ioss_evtconfig.num_evts > 0) &&
645 (TELEM_SAMPLE_PERIOD_INVALID(ioss_evtconfig.period))) {
646 pr_err("IOSS Sampling Period Out of Range\n");
647 return -EINVAL;
648 }
649
650 ret = telemetry_setup_evtconfig(pss_evtconfig, ioss_evtconfig,
651 TELEM_UPDATE);
652 if (ret)
653 pr_err("TELEMTRY Config Failed\n");
654
655 return ret;
656}
657
658
659static int telemetry_plt_set_sampling_period(u8 pss_period, u8 ioss_period)
660{
661 u32 telem_ctrl = 0;
662 int ret = 0;
663
664 mutex_lock(&(telm_conf->telem_lock));
665 if (ioss_period) {
666 if (TELEM_SAMPLE_PERIOD_INVALID(ioss_period)) {
667 pr_err("IOSS Sampling Period Out of Range\n");
668 ret = -EINVAL;
669 goto out;
670 }
671
672 /* Get telemetry EVENT CTL */
673 ret = intel_pmc_ipc_command(PMC_IPC_PMC_TELEMTRY,
674 IOSS_TELEM_EVENT_CTL_READ, NULL, 0,
675 &telem_ctrl, IOSS_TELEM_READ_WORD);
676 if (ret) {
677 pr_err("IOSS TELEM_CTRL Read Failed\n");
678 goto out;
679 }
680
681 /* Disable Telemetry */
682 TELEM_DISABLE(telem_ctrl);
683
684 ret = intel_pmc_ipc_command(PMC_IPC_PMC_TELEMTRY,
685 IOSS_TELEM_EVENT_CTL_WRITE,
686 (u8 *)&telem_ctrl,
687 IOSS_TELEM_EVT_CTRL_WRITE_SIZE,
688 NULL, 0);
689 if (ret) {
690 pr_err("IOSS TELEM_CTRL Event Disable Write Failed\n");
691 goto out;
692 }
693
694 /* Enable Periodic Telemetry Events and enable SRAM trace */
695 TELEM_CLEAR_SAMPLE_PERIOD(telem_ctrl);
696 TELEM_ENABLE_SRAM_EVT_TRACE(telem_ctrl);
697 TELEM_ENABLE_PERIODIC(telem_ctrl);
698 telem_ctrl |= ioss_period;
699
700 ret = intel_pmc_ipc_command(PMC_IPC_PMC_TELEMTRY,
701 IOSS_TELEM_EVENT_CTL_WRITE,
702 (u8 *)&telem_ctrl,
703 IOSS_TELEM_EVT_CTRL_WRITE_SIZE,
704 NULL, 0);
705 if (ret) {
706 pr_err("IOSS TELEM_CTRL Event Enable Write Failed\n");
707 goto out;
708 }
709 telm_conf->ioss_config.curr_period = ioss_period;
710 }
711
712 if (pss_period) {
713 if (TELEM_SAMPLE_PERIOD_INVALID(pss_period)) {
714 pr_err("PSS Sampling Period Out of Range\n");
715 ret = -EINVAL;
716 goto out;
717 }
718
719 /* Get telemetry EVENT CTL */
720 ret = intel_punit_ipc_command(
721 IPC_PUNIT_BIOS_READ_TELE_EVENT_CTRL,
722 0, 0, NULL, &telem_ctrl);
723 if (ret) {
724 pr_err("PSS TELEM_CTRL Read Failed\n");
725 goto out;
726 }
727
728 /* Disable Telemetry */
729 TELEM_DISABLE(telem_ctrl);
730 ret = intel_punit_ipc_command(
731 IPC_PUNIT_BIOS_WRITE_TELE_EVENT_CTRL,
732 0, 0, &telem_ctrl, NULL);
733 if (ret) {
734 pr_err("PSS TELEM_CTRL Event Disable Write Failed\n");
735 goto out;
736 }
737
738 /* Enable Periodic Telemetry Events and enable SRAM trace */
739 TELEM_CLEAR_SAMPLE_PERIOD(telem_ctrl);
740 TELEM_ENABLE_SRAM_EVT_TRACE(telem_ctrl);
741 TELEM_ENABLE_PERIODIC(telem_ctrl);
742 telem_ctrl |= pss_period;
743
744 ret = intel_punit_ipc_command(
745 IPC_PUNIT_BIOS_WRITE_TELE_EVENT_CTRL,
746 0, 0, &telem_ctrl, NULL);
747 if (ret) {
748 pr_err("PSS TELEM_CTRL Event Enable Write Failed\n");
749 goto out;
750 }
751 telm_conf->pss_config.curr_period = pss_period;
752 }
753
754out:
755 mutex_unlock(&(telm_conf->telem_lock));
756 return ret;
757}
758
759
760static int telemetry_plt_get_sampling_period(u8 *pss_min_period,
761 u8 *pss_max_period,
762 u8 *ioss_min_period,
763 u8 *ioss_max_period)
764{
765 *pss_min_period = telm_conf->pss_config.min_period;
766 *pss_max_period = telm_conf->pss_config.max_period;
767 *ioss_min_period = telm_conf->ioss_config.min_period;
768 *ioss_max_period = telm_conf->ioss_config.max_period;
769
770 return 0;
771}
772
773
774static int telemetry_plt_reset_events(void)
775{
776 struct telemetry_evtconfig pss_evtconfig, ioss_evtconfig;
777 int ret;
778
779 pss_evtconfig.evtmap = NULL;
780 pss_evtconfig.num_evts = TELEM_MAX_OS_ALLOCATED_EVENTS;
781 pss_evtconfig.period = TELEM_SAMPLING_DEFAULT_PERIOD;
782
783 ioss_evtconfig.evtmap = NULL;
784 ioss_evtconfig.num_evts = TELEM_MAX_OS_ALLOCATED_EVENTS;
785 ioss_evtconfig.period = TELEM_SAMPLING_DEFAULT_PERIOD;
786
787 ret = telemetry_setup_evtconfig(pss_evtconfig, ioss_evtconfig,
788 TELEM_RESET);
789 if (ret)
790 pr_err("TELEMTRY Reset Failed\n");
791
792 return ret;
793}
794
795
796static int telemetry_plt_get_eventconfig(struct telemetry_evtconfig *pss_config,
797 struct telemetry_evtconfig *ioss_config,
798 int pss_len, int ioss_len)
799{
800 u32 *pss_evtmap, *ioss_evtmap;
801 u32 index;
802
803 pss_evtmap = pss_config->evtmap;
804 ioss_evtmap = ioss_config->evtmap;
805
806 mutex_lock(&(telm_conf->telem_lock));
807 pss_config->num_evts = telm_conf->pss_config.ssram_evts_used;
808 ioss_config->num_evts = telm_conf->ioss_config.ssram_evts_used;
809
810 pss_config->period = telm_conf->pss_config.curr_period;
811 ioss_config->period = telm_conf->ioss_config.curr_period;
812
813 if ((pss_len < telm_conf->pss_config.ssram_evts_used) ||
814 (ioss_len < telm_conf->ioss_config.ssram_evts_used)) {
815 mutex_unlock(&(telm_conf->telem_lock));
816 return -EINVAL;
817 }
818
819 for (index = 0; index < telm_conf->pss_config.ssram_evts_used;
820 index++) {
821 pss_evtmap[index] =
822 telm_conf->pss_config.telem_evts[index].evt_id;
823 }
824
825 for (index = 0; index < telm_conf->ioss_config.ssram_evts_used;
826 index++) {
827 ioss_evtmap[index] =
828 telm_conf->ioss_config.telem_evts[index].evt_id;
829 }
830
831 mutex_unlock(&(telm_conf->telem_lock));
832 return 0;
833}
834
835
836static int telemetry_plt_add_events(u8 num_pss_evts, u8 num_ioss_evts,
837 u32 *pss_evtmap, u32 *ioss_evtmap)
838{
839 struct telemetry_evtconfig pss_evtconfig, ioss_evtconfig;
840 int ret;
841
842 pss_evtconfig.evtmap = pss_evtmap;
843 pss_evtconfig.num_evts = num_pss_evts;
844 pss_evtconfig.period = telm_conf->pss_config.curr_period;
845
846 ioss_evtconfig.evtmap = ioss_evtmap;
847 ioss_evtconfig.num_evts = num_ioss_evts;
848 ioss_evtconfig.period = telm_conf->ioss_config.curr_period;
849
850 ret = telemetry_setup_evtconfig(pss_evtconfig, ioss_evtconfig,
851 TELEM_ADD);
852 if (ret)
853 pr_err("TELEMTRY ADD Failed\n");
854
855 return ret;
856}
857
858static int telem_evtlog_read(enum telemetry_unit telem_unit,
859 struct telem_ssram_region *ssram_region, u8 len)
860{
861 struct telemetry_unit_config *unit_config;
862 u64 timestamp_prev, timestamp_next;
863 int ret, index, timeout = 0;
864
865 ret = telem_get_unitconfig(telem_unit, &unit_config);
866 if (ret < 0)
867 return ret;
868
869 if (len > unit_config->ssram_evts_used)
870 len = unit_config->ssram_evts_used;
871
872 do {
873 timestamp_prev = readq(unit_config->regmap);
874 if (!timestamp_prev) {
875 pr_err("Ssram under update. Please Try Later\n");
876 return -EBUSY;
877 }
878
879 ssram_region->start_time = readq(unit_config->regmap +
880 TELEM_SSRAM_STARTTIME_OFFSET);
881
882 for (index = 0; index < len; index++) {
883 ssram_region->events[index] =
884 readq(unit_config->regmap + TELEM_SSRAM_EVTLOG_OFFSET +
885 BYTES_PER_LONG*index);
886 }
887
888 timestamp_next = readq(unit_config->regmap);
889 if (!timestamp_next) {
890 pr_err("Ssram under update. Please Try Later\n");
891 return -EBUSY;
892 }
893
894 if (timeout++ > TELEM_SSRAM_READ_TIMEOUT) {
895 pr_err("Timeout while reading Events\n");
896 return -EBUSY;
897 }
898
899 } while (timestamp_prev != timestamp_next);
900
901 ssram_region->timestamp = timestamp_next;
902
903 return len;
904}
905
906static int telemetry_plt_raw_read_eventlog(enum telemetry_unit telem_unit,
907 struct telemetry_evtlog *evtlog,
908 int len, int log_all_evts)
909{
910 int index, idx1, ret, readlen = len;
911 struct telem_ssram_region ssram_region;
912 struct telemetry_evtmap *evtmap;
913
914 switch (telem_unit) {
915 case TELEM_PSS:
916 evtmap = telm_conf->pss_config.telem_evts;
917 break;
918
919 case TELEM_IOSS:
920 evtmap = telm_conf->ioss_config.telem_evts;
921 break;
922
923 default:
924 pr_err("Unknown Telemetry Unit Specified %d\n", telem_unit);
925 return -EINVAL;
926 }
927
928 if (!log_all_evts)
929 readlen = TELEM_MAX_EVENTS_SRAM;
930
931 ret = telem_evtlog_read(telem_unit, &ssram_region, readlen);
932 if (ret < 0)
933 return ret;
934
935 /* Invalid evt-id array specified via length mismatch */
936 if ((!log_all_evts) && (len > ret))
937 return -EINVAL;
938
939 if (log_all_evts)
940 for (index = 0; index < ret; index++) {
941 evtlog[index].telem_evtlog = ssram_region.events[index];
942 evtlog[index].telem_evtid = evtmap[index].evt_id;
943 }
944 else
945 for (index = 0, readlen = 0; (index < ret) && (readlen < len);
946 index++) {
947 for (idx1 = 0; idx1 < len; idx1++) {
948 /* Elements matched */
949 if (evtmap[index].evt_id ==
950 evtlog[idx1].telem_evtid) {
951 evtlog[idx1].telem_evtlog =
952 ssram_region.events[index];
953 readlen++;
954
955 break;
956 }
957 }
958 }
959
960 return readlen;
961}
962
963static int telemetry_plt_read_eventlog(enum telemetry_unit telem_unit,
964 struct telemetry_evtlog *evtlog, int len, int log_all_evts)
965{
966 int ret;
967
968 mutex_lock(&(telm_conf->telem_lock));
969 ret = telemetry_plt_raw_read_eventlog(telem_unit, evtlog,
970 len, log_all_evts);
971 mutex_unlock(&(telm_conf->telem_lock));
972
973 return ret;
974}
975
976static int telemetry_plt_get_trace_verbosity(enum telemetry_unit telem_unit,
977 u32 *verbosity)
978{
979 u32 temp = 0;
980 int ret;
981
982 if (verbosity == NULL)
983 return -EINVAL;
984
985 mutex_lock(&(telm_conf->telem_trace_lock));
986 switch (telem_unit) {
987 case TELEM_PSS:
988 ret = intel_punit_ipc_command(
989 IPC_PUNIT_BIOS_READ_TELE_TRACE_CTRL,
990 0, 0, NULL, &temp);
991 if (ret) {
992 pr_err("PSS TRACE_CTRL Read Failed\n");
993 goto out;
994 }
995
996 break;
997
998 case TELEM_IOSS:
999 ret = intel_pmc_ipc_command(PMC_IPC_PMC_TELEMTRY,
1000 IOSS_TELEM_TRACE_CTL_READ, NULL, 0, &temp,
1001 IOSS_TELEM_READ_WORD);
1002 if (ret) {
1003 pr_err("IOSS TRACE_CTL Read Failed\n");
1004 goto out;
1005 }
1006
1007 break;
1008
1009 default:
1010 pr_err("Unknown Telemetry Unit Specified %d\n", telem_unit);
1011 ret = -EINVAL;
1012 break;
1013 }
1014 TELEM_EXTRACT_VERBOSITY(temp, *verbosity);
1015
1016out:
1017 mutex_unlock(&(telm_conf->telem_trace_lock));
1018 return ret;
1019}
1020
1021static int telemetry_plt_set_trace_verbosity(enum telemetry_unit telem_unit,
1022 u32 verbosity)
1023{
1024 u32 temp = 0;
1025 int ret;
1026
1027 verbosity &= TELEM_TRC_VERBOSITY_MASK;
1028
1029 mutex_lock(&(telm_conf->telem_trace_lock));
1030 switch (telem_unit) {
1031 case TELEM_PSS:
1032 ret = intel_punit_ipc_command(
1033 IPC_PUNIT_BIOS_READ_TELE_TRACE_CTRL,
1034 0, 0, NULL, &temp);
1035 if (ret) {
1036 pr_err("PSS TRACE_CTRL Read Failed\n");
1037 goto out;
1038 }
1039
1040 TELEM_CLEAR_VERBOSITY_BITS(temp);
1041 TELEM_SET_VERBOSITY_BITS(temp, verbosity);
1042
1043 ret = intel_punit_ipc_command(
1044 IPC_PUNIT_BIOS_WRITE_TELE_TRACE_CTRL,
1045 0, 0, &temp, NULL);
1046 if (ret) {
1047 pr_err("PSS TRACE_CTRL Verbosity Set Failed\n");
1048 goto out;
1049 }
1050 break;
1051
1052 case TELEM_IOSS:
1053 ret = intel_pmc_ipc_command(PMC_IPC_PMC_TELEMTRY,
1054 IOSS_TELEM_TRACE_CTL_READ, NULL, 0, &temp,
1055 IOSS_TELEM_READ_WORD);
1056 if (ret) {
1057 pr_err("IOSS TRACE_CTL Read Failed\n");
1058 goto out;
1059 }
1060
1061 TELEM_CLEAR_VERBOSITY_BITS(temp);
1062 TELEM_SET_VERBOSITY_BITS(temp, verbosity);
1063
1064 ret = intel_pmc_ipc_command(PMC_IPC_PMC_TELEMTRY,
1065 IOSS_TELEM_TRACE_CTL_WRITE, (u8 *)&temp,
1066 IOSS_TELEM_WRITE_FOURBYTES, NULL, 0);
1067 if (ret) {
1068 pr_err("IOSS TRACE_CTL Verbosity Set Failed\n");
1069 goto out;
1070 }
1071 break;
1072
1073 default:
1074 pr_err("Unknown Telemetry Unit Specified %d\n", telem_unit);
1075 ret = -EINVAL;
1076 break;
1077 }
1078
1079out:
1080 mutex_unlock(&(telm_conf->telem_trace_lock));
1081 return ret;
1082}
1083
1084static struct telemetry_core_ops telm_pltops = {
1085 .get_trace_verbosity = telemetry_plt_get_trace_verbosity,
1086 .set_trace_verbosity = telemetry_plt_set_trace_verbosity,
1087 .set_sampling_period = telemetry_plt_set_sampling_period,
1088 .get_sampling_period = telemetry_plt_get_sampling_period,
1089 .raw_read_eventlog = telemetry_plt_raw_read_eventlog,
1090 .get_eventconfig = telemetry_plt_get_eventconfig,
1091 .update_events = telemetry_plt_update_events,
1092 .read_eventlog = telemetry_plt_read_eventlog,
1093 .reset_events = telemetry_plt_reset_events,
1094 .add_events = telemetry_plt_add_events,
1095};
1096
1097static int telemetry_pltdrv_probe(struct platform_device *pdev)
1098{
1099 struct resource *res0 = NULL, *res1 = NULL;
1100 const struct x86_cpu_id *id;
1101 int size, ret = -ENOMEM;
1102
1103 id = x86_match_cpu(telemetry_cpu_ids);
1104 if (!id)
1105 return -ENODEV;
1106
1107 telm_conf = (struct telemetry_plt_config *)id->driver_data;
1108
1109 res0 = platform_get_resource(pdev, IORESOURCE_MEM, 0);
1110 if (!res0) {
1111 ret = -EINVAL;
1112 goto out;
1113 }
1114 size = resource_size(res0);
1115 if (!devm_request_mem_region(&pdev->dev, res0->start, size,
1116 pdev->name)) {
1117 ret = -EBUSY;
1118 goto out;
1119 }
1120 telm_conf->pss_config.ssram_base_addr = res0->start;
1121 telm_conf->pss_config.ssram_size = size;
1122
1123 res1 = platform_get_resource(pdev, IORESOURCE_MEM, 1);
1124 if (!res1) {
1125 ret = -EINVAL;
1126 goto out;
1127 }
1128 size = resource_size(res1);
1129 if (!devm_request_mem_region(&pdev->dev, res1->start, size,
1130 pdev->name)) {
1131 ret = -EBUSY;
1132 goto out;
1133 }
1134
1135 telm_conf->ioss_config.ssram_base_addr = res1->start;
1136 telm_conf->ioss_config.ssram_size = size;
1137
1138 telm_conf->pss_config.regmap = ioremap_nocache(
1139 telm_conf->pss_config.ssram_base_addr,
1140 telm_conf->pss_config.ssram_size);
1141 if (!telm_conf->pss_config.regmap) {
1142 ret = -ENOMEM;
1143 goto out;
1144 }
1145
1146 telm_conf->ioss_config.regmap = ioremap_nocache(
1147 telm_conf->ioss_config.ssram_base_addr,
1148 telm_conf->ioss_config.ssram_size);
1149 if (!telm_conf->ioss_config.regmap) {
1150 ret = -ENOMEM;
1151 goto out;
1152 }
1153
1154 mutex_init(&telm_conf->telem_lock);
1155 mutex_init(&telm_conf->telem_trace_lock);
1156
1157 ret = telemetry_setup(pdev);
1158 if (ret)
1159 goto out;
1160
1161 ret = telemetry_set_pltdata(&telm_pltops, telm_conf);
1162 if (ret) {
1163 dev_err(&pdev->dev, "TELEMTRY Set Pltops Failed.\n");
1164 goto out;
1165 }
1166
1167 return 0;
1168
1169out:
1170 if (res0)
1171 release_mem_region(res0->start, resource_size(res0));
1172 if (res1)
1173 release_mem_region(res1->start, resource_size(res1));
1174 if (telm_conf->pss_config.regmap)
1175 iounmap(telm_conf->pss_config.regmap);
1176 if (telm_conf->ioss_config.regmap)
1177 iounmap(telm_conf->ioss_config.regmap);
1178 dev_err(&pdev->dev, "TELEMTRY Setup Failed.\n");
1179
1180 return ret;
1181}
1182
1183static int telemetry_pltdrv_remove(struct platform_device *pdev)
1184{
1185 telemetry_clear_pltdata();
1186 iounmap(telm_conf->pss_config.regmap);
1187 iounmap(telm_conf->ioss_config.regmap);
1188
1189 return 0;
1190}
1191
1192static struct platform_driver telemetry_soc_driver = {
1193 .probe = telemetry_pltdrv_probe,
1194 .remove = telemetry_pltdrv_remove,
1195 .driver = {
1196 .name = DRIVER_NAME,
1197 },
1198};
1199
1200static int __init telemetry_module_init(void)
1201{
1202 pr_info(DRIVER_NAME ": version %s loaded\n", DRIVER_VERSION);
1203 return platform_driver_register(&telemetry_soc_driver);
1204}
1205
1206static void __exit telemetry_module_exit(void)
1207{
1208 platform_driver_unregister(&telemetry_soc_driver);
1209}
1210
1211device_initcall(telemetry_module_init);
1212module_exit(telemetry_module_exit);
1213
1214MODULE_AUTHOR("Souvik Kumar Chakravarty <souvik.k.chakravarty@intel.com>");
1215MODULE_DESCRIPTION("Intel SoC Telemetry Platform Driver");
1216MODULE_VERSION(DRIVER_VERSION);
1217MODULE_LICENSE("GPL");
1/*
2 * Intel SOC Telemetry Platform Driver: Currently supports APL
3 * Copyright (c) 2015, Intel Corporation.
4 * All Rights Reserved.
5 *
6 * This program is free software; you can redistribute it and/or modify it
7 * under the terms and conditions of the GNU General Public License,
8 * version 2, as published by the Free Software Foundation.
9 *
10 * This program is distributed in the hope it will be useful, but WITHOUT
11 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
12 * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for
13 * more details.
14 *
15 * This file provides the platform specific telemetry implementation for APL.
16 * It used the PUNIT and PMC IPC interfaces for configuring the counters.
17 * The accumulated results are fetched from SRAM.
18 */
19#include <linux/module.h>
20#include <linux/init.h>
21#include <linux/device.h>
22#include <linux/debugfs.h>
23#include <linux/seq_file.h>
24#include <linux/io.h>
25#include <linux/uaccess.h>
26#include <linux/pci.h>
27#include <linux/suspend.h>
28#include <linux/platform_device.h>
29
30#include <asm/cpu_device_id.h>
31#include <asm/intel-family.h>
32#include <asm/intel_pmc_ipc.h>
33#include <asm/intel_punit_ipc.h>
34#include <asm/intel_telemetry.h>
35
36#define DRIVER_NAME "intel_telemetry"
37#define DRIVER_VERSION "1.0.0"
38
39#define TELEM_TRC_VERBOSITY_MASK 0x3
40
41#define TELEM_MIN_PERIOD(x) ((x) & 0x7F0000)
42#define TELEM_MAX_PERIOD(x) ((x) & 0x7F000000)
43#define TELEM_SAMPLE_PERIOD_INVALID(x) ((x) & (BIT(7)))
44#define TELEM_CLEAR_SAMPLE_PERIOD(x) ((x) &= ~0x7F)
45
46#define TELEM_SAMPLING_DEFAULT_PERIOD 0xD
47
48#define TELEM_MAX_EVENTS_SRAM 28
49#define TELEM_MAX_OS_ALLOCATED_EVENTS 20
50#define TELEM_SSRAM_STARTTIME_OFFSET 8
51#define TELEM_SSRAM_EVTLOG_OFFSET 16
52
53#define IOSS_TELEM_EVENT_READ 0x0
54#define IOSS_TELEM_EVENT_WRITE 0x1
55#define IOSS_TELEM_INFO_READ 0x2
56#define IOSS_TELEM_TRACE_CTL_READ 0x5
57#define IOSS_TELEM_TRACE_CTL_WRITE 0x6
58#define IOSS_TELEM_EVENT_CTL_READ 0x7
59#define IOSS_TELEM_EVENT_CTL_WRITE 0x8
60#define IOSS_TELEM_EVT_CTRL_WRITE_SIZE 0x4
61#define IOSS_TELEM_READ_WORD 0x1
62#define IOSS_TELEM_WRITE_FOURBYTES 0x4
63#define IOSS_TELEM_EVT_WRITE_SIZE 0x3
64
65#define TELEM_INFO_SRAMEVTS_MASK 0xFF00
66#define TELEM_INFO_SRAMEVTS_SHIFT 0x8
67#define TELEM_SSRAM_READ_TIMEOUT 10
68
69#define TELEM_INFO_NENABLES_MASK 0xFF
70#define TELEM_EVENT_ENABLE 0x8000
71
72#define TELEM_MASK_BIT 1
73#define TELEM_MASK_BYTE 0xFF
74#define BYTES_PER_LONG 8
75#define TELEM_MASK_PCS_STATE 0xF
76
77#define TELEM_DISABLE(x) ((x) &= ~(BIT(31)))
78#define TELEM_CLEAR_EVENTS(x) ((x) |= (BIT(30)))
79#define TELEM_ENABLE_SRAM_EVT_TRACE(x) ((x) &= ~(BIT(30) | BIT(24)))
80#define TELEM_ENABLE_PERIODIC(x) ((x) |= (BIT(23) | BIT(31) | BIT(7)))
81#define TELEM_EXTRACT_VERBOSITY(x, y) ((y) = (((x) >> 27) & 0x3))
82#define TELEM_CLEAR_VERBOSITY_BITS(x) ((x) &= ~(BIT(27) | BIT(28)))
83#define TELEM_SET_VERBOSITY_BITS(x, y) ((x) |= ((y) << 27))
84
85#define TELEM_CPU(model, data) \
86 { X86_VENDOR_INTEL, 6, model, X86_FEATURE_ANY, (unsigned long)&data }
87
88enum telemetry_action {
89 TELEM_UPDATE = 0,
90 TELEM_ADD,
91 TELEM_RESET,
92 TELEM_ACTION_NONE
93};
94
95struct telem_ssram_region {
96 u64 timestamp;
97 u64 start_time;
98 u64 events[TELEM_MAX_EVENTS_SRAM];
99};
100
101static struct telemetry_plt_config *telm_conf;
102
103/*
104 * The following counters are programmed by default during setup.
105 * Only 20 allocated to kernel driver
106 */
107static struct telemetry_evtmap
108 telemetry_apl_ioss_default_events[TELEM_MAX_OS_ALLOCATED_EVENTS] = {
109 {"SOC_S0IX_TOTAL_RES", 0x4800},
110 {"SOC_S0IX_TOTAL_OCC", 0x4000},
111 {"SOC_S0IX_SHALLOW_RES", 0x4801},
112 {"SOC_S0IX_SHALLOW_OCC", 0x4001},
113 {"SOC_S0IX_DEEP_RES", 0x4802},
114 {"SOC_S0IX_DEEP_OCC", 0x4002},
115 {"PMC_POWER_GATE", 0x5818},
116 {"PMC_D3_STATES", 0x5819},
117 {"PMC_D0I3_STATES", 0x581A},
118 {"PMC_S0IX_WAKE_REASON_GPIO", 0x6000},
119 {"PMC_S0IX_WAKE_REASON_TIMER", 0x6001},
120 {"PMC_S0IX_WAKE_REASON_VNNREQ", 0x6002},
121 {"PMC_S0IX_WAKE_REASON_LOWPOWER", 0x6003},
122 {"PMC_S0IX_WAKE_REASON_EXTERNAL", 0x6004},
123 {"PMC_S0IX_WAKE_REASON_MISC", 0x6005},
124 {"PMC_S0IX_BLOCKING_IPS_D3_D0I3", 0x6006},
125 {"PMC_S0IX_BLOCKING_IPS_PG", 0x6007},
126 {"PMC_S0IX_BLOCKING_MISC_IPS_PG", 0x6008},
127 {"PMC_S0IX_BLOCK_IPS_VNN_REQ", 0x6009},
128 {"PMC_S0IX_BLOCK_IPS_CLOCKS", 0x600B},
129};
130
131
132static struct telemetry_evtmap
133 telemetry_apl_pss_default_events[TELEM_MAX_OS_ALLOCATED_EVENTS] = {
134 {"IA_CORE0_C6_RES", 0x0400},
135 {"IA_CORE0_C6_CTR", 0x0000},
136 {"IA_MODULE0_C7_RES", 0x0410},
137 {"IA_MODULE0_C7_CTR", 0x000E},
138 {"IA_C0_RES", 0x0805},
139 {"PCS_LTR", 0x2801},
140 {"PSTATES", 0x2802},
141 {"SOC_S0I3_RES", 0x0409},
142 {"SOC_S0I3_CTR", 0x000A},
143 {"PCS_S0I3_CTR", 0x0009},
144 {"PCS_C1E_RES", 0x041A},
145 {"PCS_IDLE_STATUS", 0x2806},
146 {"IA_PERF_LIMITS", 0x280B},
147 {"GT_PERF_LIMITS", 0x280C},
148 {"PCS_WAKEUP_S0IX_CTR", 0x0030},
149 {"PCS_IDLE_BLOCKED", 0x2C00},
150 {"PCS_S0IX_BLOCKED", 0x2C01},
151 {"PCS_S0IX_WAKE_REASONS", 0x2C02},
152 {"PCS_LTR_BLOCKING", 0x2C03},
153 {"PC2_AND_MEM_SHALLOW_IDLE_RES", 0x1D40},
154};
155
156/* APL specific Data */
157static struct telemetry_plt_config telem_apl_config = {
158 .pss_config = {
159 .telem_evts = telemetry_apl_pss_default_events,
160 },
161 .ioss_config = {
162 .telem_evts = telemetry_apl_ioss_default_events,
163 },
164};
165
166static const struct x86_cpu_id telemetry_cpu_ids[] = {
167 TELEM_CPU(INTEL_FAM6_ATOM_GOLDMONT, telem_apl_config),
168 {}
169};
170
171MODULE_DEVICE_TABLE(x86cpu, telemetry_cpu_ids);
172
173static inline int telem_get_unitconfig(enum telemetry_unit telem_unit,
174 struct telemetry_unit_config **unit_config)
175{
176 if (telem_unit == TELEM_PSS)
177 *unit_config = &(telm_conf->pss_config);
178 else if (telem_unit == TELEM_IOSS)
179 *unit_config = &(telm_conf->ioss_config);
180 else
181 return -EINVAL;
182
183 return 0;
184
185}
186
187static int telemetry_check_evtid(enum telemetry_unit telem_unit,
188 u32 *evtmap, u8 len,
189 enum telemetry_action action)
190{
191 struct telemetry_unit_config *unit_config;
192 int ret;
193
194 ret = telem_get_unitconfig(telem_unit, &unit_config);
195 if (ret < 0)
196 return ret;
197
198 switch (action) {
199 case TELEM_RESET:
200 if (len > TELEM_MAX_EVENTS_SRAM)
201 return -EINVAL;
202
203 break;
204
205 case TELEM_UPDATE:
206 if (len > TELEM_MAX_EVENTS_SRAM)
207 return -EINVAL;
208
209 if ((len > 0) && (evtmap == NULL))
210 return -EINVAL;
211
212 break;
213
214 case TELEM_ADD:
215 if ((len + unit_config->ssram_evts_used) >
216 TELEM_MAX_EVENTS_SRAM)
217 return -EINVAL;
218
219 if ((len > 0) && (evtmap == NULL))
220 return -EINVAL;
221
222 break;
223
224 default:
225 pr_err("Unknown Telemetry action Specified %d\n", action);
226 return -EINVAL;
227 }
228
229 return 0;
230}
231
232
233static inline int telemetry_plt_config_ioss_event(u32 evt_id, int index)
234{
235 u32 write_buf;
236 int ret;
237
238 write_buf = evt_id | TELEM_EVENT_ENABLE;
239 write_buf <<= BITS_PER_BYTE;
240 write_buf |= index;
241
242 ret = intel_pmc_ipc_command(PMC_IPC_PMC_TELEMTRY,
243 IOSS_TELEM_EVENT_WRITE, (u8 *)&write_buf,
244 IOSS_TELEM_EVT_WRITE_SIZE, NULL, 0);
245
246 return ret;
247}
248
249static inline int telemetry_plt_config_pss_event(u32 evt_id, int index)
250{
251 u32 write_buf;
252 int ret;
253
254 write_buf = evt_id | TELEM_EVENT_ENABLE;
255 ret = intel_punit_ipc_command(IPC_PUNIT_BIOS_WRITE_TELE_EVENT,
256 index, 0, &write_buf, NULL);
257
258 return ret;
259}
260
261static int telemetry_setup_iossevtconfig(struct telemetry_evtconfig evtconfig,
262 enum telemetry_action action)
263{
264 u8 num_ioss_evts, ioss_period;
265 int ret, index, idx;
266 u32 *ioss_evtmap;
267 u32 telem_ctrl;
268
269 num_ioss_evts = evtconfig.num_evts;
270 ioss_period = evtconfig.period;
271 ioss_evtmap = evtconfig.evtmap;
272
273 /* Get telemetry EVENT CTL */
274 ret = intel_pmc_ipc_command(PMC_IPC_PMC_TELEMTRY,
275 IOSS_TELEM_EVENT_CTL_READ, NULL, 0,
276 &telem_ctrl, IOSS_TELEM_READ_WORD);
277 if (ret) {
278 pr_err("IOSS TELEM_CTRL Read Failed\n");
279 return ret;
280 }
281
282 /* Disable Telemetry */
283 TELEM_DISABLE(telem_ctrl);
284
285 ret = intel_pmc_ipc_command(PMC_IPC_PMC_TELEMTRY,
286 IOSS_TELEM_EVENT_CTL_WRITE,
287 (u8 *)&telem_ctrl,
288 IOSS_TELEM_EVT_CTRL_WRITE_SIZE,
289 NULL, 0);
290 if (ret) {
291 pr_err("IOSS TELEM_CTRL Event Disable Write Failed\n");
292 return ret;
293 }
294
295
296 /* Reset Everything */
297 if (action == TELEM_RESET) {
298 /* Clear All Events */
299 TELEM_CLEAR_EVENTS(telem_ctrl);
300
301 ret = intel_pmc_ipc_command(PMC_IPC_PMC_TELEMTRY,
302 IOSS_TELEM_EVENT_CTL_WRITE,
303 (u8 *)&telem_ctrl,
304 IOSS_TELEM_EVT_CTRL_WRITE_SIZE,
305 NULL, 0);
306 if (ret) {
307 pr_err("IOSS TELEM_CTRL Event Disable Write Failed\n");
308 return ret;
309 }
310 telm_conf->ioss_config.ssram_evts_used = 0;
311
312 /* Configure Events */
313 for (idx = 0; idx < num_ioss_evts; idx++) {
314 if (telemetry_plt_config_ioss_event(
315 telm_conf->ioss_config.telem_evts[idx].evt_id,
316 idx)) {
317 pr_err("IOSS TELEM_RESET Fail for data: %x\n",
318 telm_conf->ioss_config.telem_evts[idx].evt_id);
319 continue;
320 }
321 telm_conf->ioss_config.ssram_evts_used++;
322 }
323 }
324
325 /* Re-Configure Everything */
326 if (action == TELEM_UPDATE) {
327 /* Clear All Events */
328 TELEM_CLEAR_EVENTS(telem_ctrl);
329
330 ret = intel_pmc_ipc_command(PMC_IPC_PMC_TELEMTRY,
331 IOSS_TELEM_EVENT_CTL_WRITE,
332 (u8 *)&telem_ctrl,
333 IOSS_TELEM_EVT_CTRL_WRITE_SIZE,
334 NULL, 0);
335 if (ret) {
336 pr_err("IOSS TELEM_CTRL Event Disable Write Failed\n");
337 return ret;
338 }
339 telm_conf->ioss_config.ssram_evts_used = 0;
340
341 /* Configure Events */
342 for (index = 0; index < num_ioss_evts; index++) {
343 telm_conf->ioss_config.telem_evts[index].evt_id =
344 ioss_evtmap[index];
345
346 if (telemetry_plt_config_ioss_event(
347 telm_conf->ioss_config.telem_evts[index].evt_id,
348 index)) {
349 pr_err("IOSS TELEM_UPDATE Fail for Evt%x\n",
350 ioss_evtmap[index]);
351 continue;
352 }
353 telm_conf->ioss_config.ssram_evts_used++;
354 }
355 }
356
357 /* Add some Events */
358 if (action == TELEM_ADD) {
359 /* Configure Events */
360 for (index = telm_conf->ioss_config.ssram_evts_used, idx = 0;
361 idx < num_ioss_evts; index++, idx++) {
362 telm_conf->ioss_config.telem_evts[index].evt_id =
363 ioss_evtmap[idx];
364
365 if (telemetry_plt_config_ioss_event(
366 telm_conf->ioss_config.telem_evts[index].evt_id,
367 index)) {
368 pr_err("IOSS TELEM_ADD Fail for Event %x\n",
369 ioss_evtmap[idx]);
370 continue;
371 }
372 telm_conf->ioss_config.ssram_evts_used++;
373 }
374 }
375
376 /* Enable Periodic Telemetry Events and enable SRAM trace */
377 TELEM_CLEAR_SAMPLE_PERIOD(telem_ctrl);
378 TELEM_ENABLE_SRAM_EVT_TRACE(telem_ctrl);
379 TELEM_ENABLE_PERIODIC(telem_ctrl);
380 telem_ctrl |= ioss_period;
381
382 ret = intel_pmc_ipc_command(PMC_IPC_PMC_TELEMTRY,
383 IOSS_TELEM_EVENT_CTL_WRITE,
384 (u8 *)&telem_ctrl,
385 IOSS_TELEM_EVT_CTRL_WRITE_SIZE, NULL, 0);
386 if (ret) {
387 pr_err("IOSS TELEM_CTRL Event Enable Write Failed\n");
388 return ret;
389 }
390
391 telm_conf->ioss_config.curr_period = ioss_period;
392
393 return 0;
394}
395
396
397static int telemetry_setup_pssevtconfig(struct telemetry_evtconfig evtconfig,
398 enum telemetry_action action)
399{
400 u8 num_pss_evts, pss_period;
401 int ret, index, idx;
402 u32 *pss_evtmap;
403 u32 telem_ctrl;
404
405 num_pss_evts = evtconfig.num_evts;
406 pss_period = evtconfig.period;
407 pss_evtmap = evtconfig.evtmap;
408
409 /* PSS Config */
410 /* Get telemetry EVENT CTL */
411 ret = intel_punit_ipc_command(IPC_PUNIT_BIOS_READ_TELE_EVENT_CTRL,
412 0, 0, NULL, &telem_ctrl);
413 if (ret) {
414 pr_err("PSS TELEM_CTRL Read Failed\n");
415 return ret;
416 }
417
418 /* Disable Telemetry */
419 TELEM_DISABLE(telem_ctrl);
420 ret = intel_punit_ipc_command(IPC_PUNIT_BIOS_WRITE_TELE_EVENT_CTRL,
421 0, 0, &telem_ctrl, NULL);
422 if (ret) {
423 pr_err("PSS TELEM_CTRL Event Disable Write Failed\n");
424 return ret;
425 }
426
427 /* Reset Everything */
428 if (action == TELEM_RESET) {
429 /* Clear All Events */
430 TELEM_CLEAR_EVENTS(telem_ctrl);
431
432 ret = intel_punit_ipc_command(
433 IPC_PUNIT_BIOS_WRITE_TELE_EVENT_CTRL,
434 0, 0, &telem_ctrl, NULL);
435 if (ret) {
436 pr_err("PSS TELEM_CTRL Event Disable Write Failed\n");
437 return ret;
438 }
439 telm_conf->pss_config.ssram_evts_used = 0;
440 /* Configure Events */
441 for (idx = 0; idx < num_pss_evts; idx++) {
442 if (telemetry_plt_config_pss_event(
443 telm_conf->pss_config.telem_evts[idx].evt_id,
444 idx)) {
445 pr_err("PSS TELEM_RESET Fail for Event %x\n",
446 telm_conf->pss_config.telem_evts[idx].evt_id);
447 continue;
448 }
449 telm_conf->pss_config.ssram_evts_used++;
450 }
451 }
452
453 /* Re-Configure Everything */
454 if (action == TELEM_UPDATE) {
455 /* Clear All Events */
456 TELEM_CLEAR_EVENTS(telem_ctrl);
457
458 ret = intel_punit_ipc_command(
459 IPC_PUNIT_BIOS_WRITE_TELE_EVENT_CTRL,
460 0, 0, &telem_ctrl, NULL);
461 if (ret) {
462 pr_err("PSS TELEM_CTRL Event Disable Write Failed\n");
463 return ret;
464 }
465 telm_conf->pss_config.ssram_evts_used = 0;
466
467 /* Configure Events */
468 for (index = 0; index < num_pss_evts; index++) {
469 telm_conf->pss_config.telem_evts[index].evt_id =
470 pss_evtmap[index];
471
472 if (telemetry_plt_config_pss_event(
473 telm_conf->pss_config.telem_evts[index].evt_id,
474 index)) {
475 pr_err("PSS TELEM_UPDATE Fail for Event %x\n",
476 pss_evtmap[index]);
477 continue;
478 }
479 telm_conf->pss_config.ssram_evts_used++;
480 }
481 }
482
483 /* Add some Events */
484 if (action == TELEM_ADD) {
485 /* Configure Events */
486 for (index = telm_conf->pss_config.ssram_evts_used, idx = 0;
487 idx < num_pss_evts; index++, idx++) {
488
489 telm_conf->pss_config.telem_evts[index].evt_id =
490 pss_evtmap[idx];
491
492 if (telemetry_plt_config_pss_event(
493 telm_conf->pss_config.telem_evts[index].evt_id,
494 index)) {
495 pr_err("PSS TELEM_ADD Fail for Event %x\n",
496 pss_evtmap[idx]);
497 continue;
498 }
499 telm_conf->pss_config.ssram_evts_used++;
500 }
501 }
502
503 /* Enable Periodic Telemetry Events and enable SRAM trace */
504 TELEM_CLEAR_SAMPLE_PERIOD(telem_ctrl);
505 TELEM_ENABLE_SRAM_EVT_TRACE(telem_ctrl);
506 TELEM_ENABLE_PERIODIC(telem_ctrl);
507 telem_ctrl |= pss_period;
508
509 ret = intel_punit_ipc_command(IPC_PUNIT_BIOS_WRITE_TELE_EVENT_CTRL,
510 0, 0, &telem_ctrl, NULL);
511 if (ret) {
512 pr_err("PSS TELEM_CTRL Event Enable Write Failed\n");
513 return ret;
514 }
515
516 telm_conf->pss_config.curr_period = pss_period;
517
518 return 0;
519}
520
521static int telemetry_setup_evtconfig(struct telemetry_evtconfig pss_evtconfig,
522 struct telemetry_evtconfig ioss_evtconfig,
523 enum telemetry_action action)
524{
525 int ret;
526
527 mutex_lock(&(telm_conf->telem_lock));
528
529 if ((action == TELEM_UPDATE) && (telm_conf->telem_in_use)) {
530 ret = -EBUSY;
531 goto out;
532 }
533
534 ret = telemetry_check_evtid(TELEM_PSS, pss_evtconfig.evtmap,
535 pss_evtconfig.num_evts, action);
536 if (ret)
537 goto out;
538
539 ret = telemetry_check_evtid(TELEM_IOSS, ioss_evtconfig.evtmap,
540 ioss_evtconfig.num_evts, action);
541 if (ret)
542 goto out;
543
544 if (ioss_evtconfig.num_evts) {
545 ret = telemetry_setup_iossevtconfig(ioss_evtconfig, action);
546 if (ret)
547 goto out;
548 }
549
550 if (pss_evtconfig.num_evts) {
551 ret = telemetry_setup_pssevtconfig(pss_evtconfig, action);
552 if (ret)
553 goto out;
554 }
555
556 if ((action == TELEM_UPDATE) || (action == TELEM_ADD))
557 telm_conf->telem_in_use = true;
558 else
559 telm_conf->telem_in_use = false;
560
561out:
562 mutex_unlock(&(telm_conf->telem_lock));
563 return ret;
564}
565
566static int telemetry_setup(struct platform_device *pdev)
567{
568 struct telemetry_evtconfig pss_evtconfig, ioss_evtconfig;
569 u32 read_buf, events, event_regs;
570 int ret;
571
572 ret = intel_pmc_ipc_command(PMC_IPC_PMC_TELEMTRY, IOSS_TELEM_INFO_READ,
573 NULL, 0, &read_buf, IOSS_TELEM_READ_WORD);
574 if (ret) {
575 dev_err(&pdev->dev, "IOSS TELEM_INFO Read Failed\n");
576 return ret;
577 }
578
579 /* Get telemetry Info */
580 events = (read_buf & TELEM_INFO_SRAMEVTS_MASK) >>
581 TELEM_INFO_SRAMEVTS_SHIFT;
582 event_regs = read_buf & TELEM_INFO_NENABLES_MASK;
583 if ((events < TELEM_MAX_EVENTS_SRAM) ||
584 (event_regs < TELEM_MAX_EVENTS_SRAM)) {
585 dev_err(&pdev->dev, "IOSS:Insufficient Space for SRAM Trace\n");
586 dev_err(&pdev->dev, "SRAM Events %d; Event Regs %d\n",
587 events, event_regs);
588 return -ENOMEM;
589 }
590
591 telm_conf->ioss_config.min_period = TELEM_MIN_PERIOD(read_buf);
592 telm_conf->ioss_config.max_period = TELEM_MAX_PERIOD(read_buf);
593
594 /* PUNIT Mailbox Setup */
595 ret = intel_punit_ipc_command(IPC_PUNIT_BIOS_READ_TELE_INFO, 0, 0,
596 NULL, &read_buf);
597 if (ret) {
598 dev_err(&pdev->dev, "PSS TELEM_INFO Read Failed\n");
599 return ret;
600 }
601
602 /* Get telemetry Info */
603 events = (read_buf & TELEM_INFO_SRAMEVTS_MASK) >>
604 TELEM_INFO_SRAMEVTS_SHIFT;
605 event_regs = read_buf & TELEM_INFO_SRAMEVTS_MASK;
606 if ((events < TELEM_MAX_EVENTS_SRAM) ||
607 (event_regs < TELEM_MAX_EVENTS_SRAM)) {
608 dev_err(&pdev->dev, "PSS:Insufficient Space for SRAM Trace\n");
609 dev_err(&pdev->dev, "SRAM Events %d; Event Regs %d\n",
610 events, event_regs);
611 return -ENOMEM;
612 }
613
614 telm_conf->pss_config.min_period = TELEM_MIN_PERIOD(read_buf);
615 telm_conf->pss_config.max_period = TELEM_MAX_PERIOD(read_buf);
616
617 pss_evtconfig.evtmap = NULL;
618 pss_evtconfig.num_evts = TELEM_MAX_OS_ALLOCATED_EVENTS;
619 pss_evtconfig.period = TELEM_SAMPLING_DEFAULT_PERIOD;
620
621 ioss_evtconfig.evtmap = NULL;
622 ioss_evtconfig.num_evts = TELEM_MAX_OS_ALLOCATED_EVENTS;
623 ioss_evtconfig.period = TELEM_SAMPLING_DEFAULT_PERIOD;
624
625 ret = telemetry_setup_evtconfig(pss_evtconfig, ioss_evtconfig,
626 TELEM_RESET);
627 if (ret) {
628 dev_err(&pdev->dev, "TELEMTRY Setup Failed\n");
629 return ret;
630 }
631 return 0;
632}
633
634static int telemetry_plt_update_events(struct telemetry_evtconfig pss_evtconfig,
635 struct telemetry_evtconfig ioss_evtconfig)
636{
637 int ret;
638
639 if ((pss_evtconfig.num_evts > 0) &&
640 (TELEM_SAMPLE_PERIOD_INVALID(pss_evtconfig.period))) {
641 pr_err("PSS Sampling Period Out of Range\n");
642 return -EINVAL;
643 }
644
645 if ((ioss_evtconfig.num_evts > 0) &&
646 (TELEM_SAMPLE_PERIOD_INVALID(ioss_evtconfig.period))) {
647 pr_err("IOSS Sampling Period Out of Range\n");
648 return -EINVAL;
649 }
650
651 ret = telemetry_setup_evtconfig(pss_evtconfig, ioss_evtconfig,
652 TELEM_UPDATE);
653 if (ret)
654 pr_err("TELEMTRY Config Failed\n");
655
656 return ret;
657}
658
659
660static int telemetry_plt_set_sampling_period(u8 pss_period, u8 ioss_period)
661{
662 u32 telem_ctrl = 0;
663 int ret = 0;
664
665 mutex_lock(&(telm_conf->telem_lock));
666 if (ioss_period) {
667 if (TELEM_SAMPLE_PERIOD_INVALID(ioss_period)) {
668 pr_err("IOSS Sampling Period Out of Range\n");
669 ret = -EINVAL;
670 goto out;
671 }
672
673 /* Get telemetry EVENT CTL */
674 ret = intel_pmc_ipc_command(PMC_IPC_PMC_TELEMTRY,
675 IOSS_TELEM_EVENT_CTL_READ, NULL, 0,
676 &telem_ctrl, IOSS_TELEM_READ_WORD);
677 if (ret) {
678 pr_err("IOSS TELEM_CTRL Read Failed\n");
679 goto out;
680 }
681
682 /* Disable Telemetry */
683 TELEM_DISABLE(telem_ctrl);
684
685 ret = intel_pmc_ipc_command(PMC_IPC_PMC_TELEMTRY,
686 IOSS_TELEM_EVENT_CTL_WRITE,
687 (u8 *)&telem_ctrl,
688 IOSS_TELEM_EVT_CTRL_WRITE_SIZE,
689 NULL, 0);
690 if (ret) {
691 pr_err("IOSS TELEM_CTRL Event Disable Write Failed\n");
692 goto out;
693 }
694
695 /* Enable Periodic Telemetry Events and enable SRAM trace */
696 TELEM_CLEAR_SAMPLE_PERIOD(telem_ctrl);
697 TELEM_ENABLE_SRAM_EVT_TRACE(telem_ctrl);
698 TELEM_ENABLE_PERIODIC(telem_ctrl);
699 telem_ctrl |= ioss_period;
700
701 ret = intel_pmc_ipc_command(PMC_IPC_PMC_TELEMTRY,
702 IOSS_TELEM_EVENT_CTL_WRITE,
703 (u8 *)&telem_ctrl,
704 IOSS_TELEM_EVT_CTRL_WRITE_SIZE,
705 NULL, 0);
706 if (ret) {
707 pr_err("IOSS TELEM_CTRL Event Enable Write Failed\n");
708 goto out;
709 }
710 telm_conf->ioss_config.curr_period = ioss_period;
711 }
712
713 if (pss_period) {
714 if (TELEM_SAMPLE_PERIOD_INVALID(pss_period)) {
715 pr_err("PSS Sampling Period Out of Range\n");
716 ret = -EINVAL;
717 goto out;
718 }
719
720 /* Get telemetry EVENT CTL */
721 ret = intel_punit_ipc_command(
722 IPC_PUNIT_BIOS_READ_TELE_EVENT_CTRL,
723 0, 0, NULL, &telem_ctrl);
724 if (ret) {
725 pr_err("PSS TELEM_CTRL Read Failed\n");
726 goto out;
727 }
728
729 /* Disable Telemetry */
730 TELEM_DISABLE(telem_ctrl);
731 ret = intel_punit_ipc_command(
732 IPC_PUNIT_BIOS_WRITE_TELE_EVENT_CTRL,
733 0, 0, &telem_ctrl, NULL);
734 if (ret) {
735 pr_err("PSS TELEM_CTRL Event Disable Write Failed\n");
736 goto out;
737 }
738
739 /* Enable Periodic Telemetry Events and enable SRAM trace */
740 TELEM_CLEAR_SAMPLE_PERIOD(telem_ctrl);
741 TELEM_ENABLE_SRAM_EVT_TRACE(telem_ctrl);
742 TELEM_ENABLE_PERIODIC(telem_ctrl);
743 telem_ctrl |= pss_period;
744
745 ret = intel_punit_ipc_command(
746 IPC_PUNIT_BIOS_WRITE_TELE_EVENT_CTRL,
747 0, 0, &telem_ctrl, NULL);
748 if (ret) {
749 pr_err("PSS TELEM_CTRL Event Enable Write Failed\n");
750 goto out;
751 }
752 telm_conf->pss_config.curr_period = pss_period;
753 }
754
755out:
756 mutex_unlock(&(telm_conf->telem_lock));
757 return ret;
758}
759
760
761static int telemetry_plt_get_sampling_period(u8 *pss_min_period,
762 u8 *pss_max_period,
763 u8 *ioss_min_period,
764 u8 *ioss_max_period)
765{
766 *pss_min_period = telm_conf->pss_config.min_period;
767 *pss_max_period = telm_conf->pss_config.max_period;
768 *ioss_min_period = telm_conf->ioss_config.min_period;
769 *ioss_max_period = telm_conf->ioss_config.max_period;
770
771 return 0;
772}
773
774
775static int telemetry_plt_reset_events(void)
776{
777 struct telemetry_evtconfig pss_evtconfig, ioss_evtconfig;
778 int ret;
779
780 pss_evtconfig.evtmap = NULL;
781 pss_evtconfig.num_evts = TELEM_MAX_OS_ALLOCATED_EVENTS;
782 pss_evtconfig.period = TELEM_SAMPLING_DEFAULT_PERIOD;
783
784 ioss_evtconfig.evtmap = NULL;
785 ioss_evtconfig.num_evts = TELEM_MAX_OS_ALLOCATED_EVENTS;
786 ioss_evtconfig.period = TELEM_SAMPLING_DEFAULT_PERIOD;
787
788 ret = telemetry_setup_evtconfig(pss_evtconfig, ioss_evtconfig,
789 TELEM_RESET);
790 if (ret)
791 pr_err("TELEMTRY Reset Failed\n");
792
793 return ret;
794}
795
796
797static int telemetry_plt_get_eventconfig(struct telemetry_evtconfig *pss_config,
798 struct telemetry_evtconfig *ioss_config,
799 int pss_len, int ioss_len)
800{
801 u32 *pss_evtmap, *ioss_evtmap;
802 u32 index;
803
804 pss_evtmap = pss_config->evtmap;
805 ioss_evtmap = ioss_config->evtmap;
806
807 mutex_lock(&(telm_conf->telem_lock));
808 pss_config->num_evts = telm_conf->pss_config.ssram_evts_used;
809 ioss_config->num_evts = telm_conf->ioss_config.ssram_evts_used;
810
811 pss_config->period = telm_conf->pss_config.curr_period;
812 ioss_config->period = telm_conf->ioss_config.curr_period;
813
814 if ((pss_len < telm_conf->pss_config.ssram_evts_used) ||
815 (ioss_len < telm_conf->ioss_config.ssram_evts_used)) {
816 mutex_unlock(&(telm_conf->telem_lock));
817 return -EINVAL;
818 }
819
820 for (index = 0; index < telm_conf->pss_config.ssram_evts_used;
821 index++) {
822 pss_evtmap[index] =
823 telm_conf->pss_config.telem_evts[index].evt_id;
824 }
825
826 for (index = 0; index < telm_conf->ioss_config.ssram_evts_used;
827 index++) {
828 ioss_evtmap[index] =
829 telm_conf->ioss_config.telem_evts[index].evt_id;
830 }
831
832 mutex_unlock(&(telm_conf->telem_lock));
833 return 0;
834}
835
836
837static int telemetry_plt_add_events(u8 num_pss_evts, u8 num_ioss_evts,
838 u32 *pss_evtmap, u32 *ioss_evtmap)
839{
840 struct telemetry_evtconfig pss_evtconfig, ioss_evtconfig;
841 int ret;
842
843 pss_evtconfig.evtmap = pss_evtmap;
844 pss_evtconfig.num_evts = num_pss_evts;
845 pss_evtconfig.period = telm_conf->pss_config.curr_period;
846
847 ioss_evtconfig.evtmap = ioss_evtmap;
848 ioss_evtconfig.num_evts = num_ioss_evts;
849 ioss_evtconfig.period = telm_conf->ioss_config.curr_period;
850
851 ret = telemetry_setup_evtconfig(pss_evtconfig, ioss_evtconfig,
852 TELEM_ADD);
853 if (ret)
854 pr_err("TELEMTRY ADD Failed\n");
855
856 return ret;
857}
858
859static int telem_evtlog_read(enum telemetry_unit telem_unit,
860 struct telem_ssram_region *ssram_region, u8 len)
861{
862 struct telemetry_unit_config *unit_config;
863 u64 timestamp_prev, timestamp_next;
864 int ret, index, timeout = 0;
865
866 ret = telem_get_unitconfig(telem_unit, &unit_config);
867 if (ret < 0)
868 return ret;
869
870 if (len > unit_config->ssram_evts_used)
871 len = unit_config->ssram_evts_used;
872
873 do {
874 timestamp_prev = readq(unit_config->regmap);
875 if (!timestamp_prev) {
876 pr_err("Ssram under update. Please Try Later\n");
877 return -EBUSY;
878 }
879
880 ssram_region->start_time = readq(unit_config->regmap +
881 TELEM_SSRAM_STARTTIME_OFFSET);
882
883 for (index = 0; index < len; index++) {
884 ssram_region->events[index] =
885 readq(unit_config->regmap + TELEM_SSRAM_EVTLOG_OFFSET +
886 BYTES_PER_LONG*index);
887 }
888
889 timestamp_next = readq(unit_config->regmap);
890 if (!timestamp_next) {
891 pr_err("Ssram under update. Please Try Later\n");
892 return -EBUSY;
893 }
894
895 if (timeout++ > TELEM_SSRAM_READ_TIMEOUT) {
896 pr_err("Timeout while reading Events\n");
897 return -EBUSY;
898 }
899
900 } while (timestamp_prev != timestamp_next);
901
902 ssram_region->timestamp = timestamp_next;
903
904 return len;
905}
906
907static int telemetry_plt_raw_read_eventlog(enum telemetry_unit telem_unit,
908 struct telemetry_evtlog *evtlog,
909 int len, int log_all_evts)
910{
911 int index, idx1, ret, readlen = len;
912 struct telem_ssram_region ssram_region;
913 struct telemetry_evtmap *evtmap;
914
915 switch (telem_unit) {
916 case TELEM_PSS:
917 evtmap = telm_conf->pss_config.telem_evts;
918 break;
919
920 case TELEM_IOSS:
921 evtmap = telm_conf->ioss_config.telem_evts;
922 break;
923
924 default:
925 pr_err("Unknown Telemetry Unit Specified %d\n", telem_unit);
926 return -EINVAL;
927 }
928
929 if (!log_all_evts)
930 readlen = TELEM_MAX_EVENTS_SRAM;
931
932 ret = telem_evtlog_read(telem_unit, &ssram_region, readlen);
933 if (ret < 0)
934 return ret;
935
936 /* Invalid evt-id array specified via length mismatch */
937 if ((!log_all_evts) && (len > ret))
938 return -EINVAL;
939
940 if (log_all_evts)
941 for (index = 0; index < ret; index++) {
942 evtlog[index].telem_evtlog = ssram_region.events[index];
943 evtlog[index].telem_evtid = evtmap[index].evt_id;
944 }
945 else
946 for (index = 0, readlen = 0; (index < ret) && (readlen < len);
947 index++) {
948 for (idx1 = 0; idx1 < len; idx1++) {
949 /* Elements matched */
950 if (evtmap[index].evt_id ==
951 evtlog[idx1].telem_evtid) {
952 evtlog[idx1].telem_evtlog =
953 ssram_region.events[index];
954 readlen++;
955
956 break;
957 }
958 }
959 }
960
961 return readlen;
962}
963
964static int telemetry_plt_read_eventlog(enum telemetry_unit telem_unit,
965 struct telemetry_evtlog *evtlog, int len, int log_all_evts)
966{
967 int ret;
968
969 mutex_lock(&(telm_conf->telem_lock));
970 ret = telemetry_plt_raw_read_eventlog(telem_unit, evtlog,
971 len, log_all_evts);
972 mutex_unlock(&(telm_conf->telem_lock));
973
974 return ret;
975}
976
977static int telemetry_plt_get_trace_verbosity(enum telemetry_unit telem_unit,
978 u32 *verbosity)
979{
980 u32 temp = 0;
981 int ret;
982
983 if (verbosity == NULL)
984 return -EINVAL;
985
986 mutex_lock(&(telm_conf->telem_trace_lock));
987 switch (telem_unit) {
988 case TELEM_PSS:
989 ret = intel_punit_ipc_command(
990 IPC_PUNIT_BIOS_READ_TELE_TRACE_CTRL,
991 0, 0, NULL, &temp);
992 if (ret) {
993 pr_err("PSS TRACE_CTRL Read Failed\n");
994 goto out;
995 }
996
997 break;
998
999 case TELEM_IOSS:
1000 ret = intel_pmc_ipc_command(PMC_IPC_PMC_TELEMTRY,
1001 IOSS_TELEM_TRACE_CTL_READ, NULL, 0, &temp,
1002 IOSS_TELEM_READ_WORD);
1003 if (ret) {
1004 pr_err("IOSS TRACE_CTL Read Failed\n");
1005 goto out;
1006 }
1007
1008 break;
1009
1010 default:
1011 pr_err("Unknown Telemetry Unit Specified %d\n", telem_unit);
1012 ret = -EINVAL;
1013 break;
1014 }
1015 TELEM_EXTRACT_VERBOSITY(temp, *verbosity);
1016
1017out:
1018 mutex_unlock(&(telm_conf->telem_trace_lock));
1019 return ret;
1020}
1021
1022static int telemetry_plt_set_trace_verbosity(enum telemetry_unit telem_unit,
1023 u32 verbosity)
1024{
1025 u32 temp = 0;
1026 int ret;
1027
1028 verbosity &= TELEM_TRC_VERBOSITY_MASK;
1029
1030 mutex_lock(&(telm_conf->telem_trace_lock));
1031 switch (telem_unit) {
1032 case TELEM_PSS:
1033 ret = intel_punit_ipc_command(
1034 IPC_PUNIT_BIOS_READ_TELE_TRACE_CTRL,
1035 0, 0, NULL, &temp);
1036 if (ret) {
1037 pr_err("PSS TRACE_CTRL Read Failed\n");
1038 goto out;
1039 }
1040
1041 TELEM_CLEAR_VERBOSITY_BITS(temp);
1042 TELEM_SET_VERBOSITY_BITS(temp, verbosity);
1043
1044 ret = intel_punit_ipc_command(
1045 IPC_PUNIT_BIOS_WRITE_TELE_TRACE_CTRL,
1046 0, 0, &temp, NULL);
1047 if (ret) {
1048 pr_err("PSS TRACE_CTRL Verbosity Set Failed\n");
1049 goto out;
1050 }
1051 break;
1052
1053 case TELEM_IOSS:
1054 ret = intel_pmc_ipc_command(PMC_IPC_PMC_TELEMTRY,
1055 IOSS_TELEM_TRACE_CTL_READ, NULL, 0, &temp,
1056 IOSS_TELEM_READ_WORD);
1057 if (ret) {
1058 pr_err("IOSS TRACE_CTL Read Failed\n");
1059 goto out;
1060 }
1061
1062 TELEM_CLEAR_VERBOSITY_BITS(temp);
1063 TELEM_SET_VERBOSITY_BITS(temp, verbosity);
1064
1065 ret = intel_pmc_ipc_command(PMC_IPC_PMC_TELEMTRY,
1066 IOSS_TELEM_TRACE_CTL_WRITE, (u8 *)&temp,
1067 IOSS_TELEM_WRITE_FOURBYTES, NULL, 0);
1068 if (ret) {
1069 pr_err("IOSS TRACE_CTL Verbosity Set Failed\n");
1070 goto out;
1071 }
1072 break;
1073
1074 default:
1075 pr_err("Unknown Telemetry Unit Specified %d\n", telem_unit);
1076 ret = -EINVAL;
1077 break;
1078 }
1079
1080out:
1081 mutex_unlock(&(telm_conf->telem_trace_lock));
1082 return ret;
1083}
1084
1085static const struct telemetry_core_ops telm_pltops = {
1086 .get_trace_verbosity = telemetry_plt_get_trace_verbosity,
1087 .set_trace_verbosity = telemetry_plt_set_trace_verbosity,
1088 .set_sampling_period = telemetry_plt_set_sampling_period,
1089 .get_sampling_period = telemetry_plt_get_sampling_period,
1090 .raw_read_eventlog = telemetry_plt_raw_read_eventlog,
1091 .get_eventconfig = telemetry_plt_get_eventconfig,
1092 .update_events = telemetry_plt_update_events,
1093 .read_eventlog = telemetry_plt_read_eventlog,
1094 .reset_events = telemetry_plt_reset_events,
1095 .add_events = telemetry_plt_add_events,
1096};
1097
1098static int telemetry_pltdrv_probe(struct platform_device *pdev)
1099{
1100 struct resource *res0 = NULL, *res1 = NULL;
1101 const struct x86_cpu_id *id;
1102 int size, ret = -ENOMEM;
1103
1104 id = x86_match_cpu(telemetry_cpu_ids);
1105 if (!id)
1106 return -ENODEV;
1107
1108 telm_conf = (struct telemetry_plt_config *)id->driver_data;
1109
1110 res0 = platform_get_resource(pdev, IORESOURCE_MEM, 0);
1111 if (!res0) {
1112 ret = -EINVAL;
1113 goto out;
1114 }
1115 size = resource_size(res0);
1116 if (!devm_request_mem_region(&pdev->dev, res0->start, size,
1117 pdev->name)) {
1118 ret = -EBUSY;
1119 goto out;
1120 }
1121 telm_conf->pss_config.ssram_base_addr = res0->start;
1122 telm_conf->pss_config.ssram_size = size;
1123
1124 res1 = platform_get_resource(pdev, IORESOURCE_MEM, 1);
1125 if (!res1) {
1126 ret = -EINVAL;
1127 goto out;
1128 }
1129 size = resource_size(res1);
1130 if (!devm_request_mem_region(&pdev->dev, res1->start, size,
1131 pdev->name)) {
1132 ret = -EBUSY;
1133 goto out;
1134 }
1135
1136 telm_conf->ioss_config.ssram_base_addr = res1->start;
1137 telm_conf->ioss_config.ssram_size = size;
1138
1139 telm_conf->pss_config.regmap = ioremap_nocache(
1140 telm_conf->pss_config.ssram_base_addr,
1141 telm_conf->pss_config.ssram_size);
1142 if (!telm_conf->pss_config.regmap) {
1143 ret = -ENOMEM;
1144 goto out;
1145 }
1146
1147 telm_conf->ioss_config.regmap = ioremap_nocache(
1148 telm_conf->ioss_config.ssram_base_addr,
1149 telm_conf->ioss_config.ssram_size);
1150 if (!telm_conf->ioss_config.regmap) {
1151 ret = -ENOMEM;
1152 goto out;
1153 }
1154
1155 mutex_init(&telm_conf->telem_lock);
1156 mutex_init(&telm_conf->telem_trace_lock);
1157
1158 ret = telemetry_setup(pdev);
1159 if (ret)
1160 goto out;
1161
1162 ret = telemetry_set_pltdata(&telm_pltops, telm_conf);
1163 if (ret) {
1164 dev_err(&pdev->dev, "TELEMTRY Set Pltops Failed.\n");
1165 goto out;
1166 }
1167
1168 return 0;
1169
1170out:
1171 if (res0)
1172 release_mem_region(res0->start, resource_size(res0));
1173 if (res1)
1174 release_mem_region(res1->start, resource_size(res1));
1175 if (telm_conf->pss_config.regmap)
1176 iounmap(telm_conf->pss_config.regmap);
1177 if (telm_conf->ioss_config.regmap)
1178 iounmap(telm_conf->ioss_config.regmap);
1179 dev_err(&pdev->dev, "TELEMTRY Setup Failed.\n");
1180
1181 return ret;
1182}
1183
1184static int telemetry_pltdrv_remove(struct platform_device *pdev)
1185{
1186 telemetry_clear_pltdata();
1187 iounmap(telm_conf->pss_config.regmap);
1188 iounmap(telm_conf->ioss_config.regmap);
1189
1190 return 0;
1191}
1192
1193static struct platform_driver telemetry_soc_driver = {
1194 .probe = telemetry_pltdrv_probe,
1195 .remove = telemetry_pltdrv_remove,
1196 .driver = {
1197 .name = DRIVER_NAME,
1198 },
1199};
1200
1201static int __init telemetry_module_init(void)
1202{
1203 pr_info(DRIVER_NAME ": version %s loaded\n", DRIVER_VERSION);
1204 return platform_driver_register(&telemetry_soc_driver);
1205}
1206
1207static void __exit telemetry_module_exit(void)
1208{
1209 platform_driver_unregister(&telemetry_soc_driver);
1210}
1211
1212device_initcall(telemetry_module_init);
1213module_exit(telemetry_module_exit);
1214
1215MODULE_AUTHOR("Souvik Kumar Chakravarty <souvik.k.chakravarty@intel.com>");
1216MODULE_DESCRIPTION("Intel SoC Telemetry Platform Driver");
1217MODULE_VERSION(DRIVER_VERSION);
1218MODULE_LICENSE("GPL");