1 // SPDX-License-Identifier: MIT 2 /* 3 * Copyright © 2022 Intel Corporation 4 */ 5 6 #include <drm/drm_device.h> 7 #include <linux/sysfs.h> 8 #include <linux/printk.h> 9 10 #include "i915_drv.h" 11 #include "i915_reg.h" 12 #include "i915_sysfs.h" 13 #include "intel_gt.h" 14 #include "intel_gt_print.h" 15 #include "intel_gt_regs.h" 16 #include "intel_gt_sysfs.h" 17 #include "intel_gt_sysfs_pm.h" 18 #include "intel_pcode.h" 19 #include "intel_rc6.h" 20 #include "intel_rps.h" 21 22 enum intel_gt_sysfs_op { 23 INTEL_GT_SYSFS_MIN = 0, 24 INTEL_GT_SYSFS_MAX, 25 }; 26 27 static int 28 sysfs_gt_attribute_w_func(struct kobject *kobj, struct attribute *attr, 29 int (func)(struct intel_gt *gt, u32 val), u32 val) 30 { 31 struct intel_gt *gt; 32 int ret; 33 34 if (!is_object_gt(kobj)) { 35 int i; 36 struct device *dev = kobj_to_dev(kobj); 37 struct drm_i915_private *i915 = kdev_minor_to_i915(dev); 38 39 for_each_gt(gt, i915, i) { 40 ret = func(gt, val); 41 if (ret) 42 break; 43 } 44 } else { 45 gt = intel_gt_sysfs_get_drvdata(kobj, attr->name); 46 ret = func(gt, val); 47 } 48 49 return ret; 50 } 51 52 static u32 53 sysfs_gt_attribute_r_func(struct kobject *kobj, struct attribute *attr, 54 u32 (func)(struct intel_gt *gt), 55 enum intel_gt_sysfs_op op) 56 { 57 struct intel_gt *gt; 58 u32 ret; 59 60 ret = (op == INTEL_GT_SYSFS_MAX) ? 0 : (u32) -1; 61 62 if (!is_object_gt(kobj)) { 63 int i; 64 struct device *dev = kobj_to_dev(kobj); 65 struct drm_i915_private *i915 = kdev_minor_to_i915(dev); 66 67 for_each_gt(gt, i915, i) { 68 u32 val = func(gt); 69 70 switch (op) { 71 case INTEL_GT_SYSFS_MIN: 72 if (val < ret) 73 ret = val; 74 break; 75 76 case INTEL_GT_SYSFS_MAX: 77 if (val > ret) 78 ret = val; 79 break; 80 } 81 } 82 } else { 83 gt = intel_gt_sysfs_get_drvdata(kobj, attr->name); 84 ret = func(gt); 85 } 86 87 return ret; 88 } 89 90 /* RC6 interfaces will show the minimum RC6 residency value */ 91 #define sysfs_gt_attribute_r_min_func(d, a, f) \ 92 sysfs_gt_attribute_r_func(d, a, f, INTEL_GT_SYSFS_MIN) 93 94 /* Frequency interfaces will show the maximum frequency value */ 95 #define sysfs_gt_attribute_r_max_func(d, a, f) \ 96 sysfs_gt_attribute_r_func(d, a, f, INTEL_GT_SYSFS_MAX) 97 98 #define INTEL_GT_SYSFS_SHOW(_name, _attr_type) \ 99 static ssize_t _name##_show_common(struct kobject *kobj, \ 100 struct attribute *attr, char *buff) \ 101 { \ 102 u32 val = sysfs_gt_attribute_r_##_attr_type##_func(kobj, attr, \ 103 __##_name##_show); \ 104 \ 105 return sysfs_emit(buff, "%u\n", val); \ 106 } \ 107 static ssize_t _name##_show(struct kobject *kobj, \ 108 struct kobj_attribute *attr, char *buff) \ 109 { \ 110 return _name ##_show_common(kobj, &attr->attr, buff); \ 111 } \ 112 static ssize_t _name##_dev_show(struct device *dev, \ 113 struct device_attribute *attr, char *buff) \ 114 { \ 115 return _name##_show_common(&dev->kobj, &attr->attr, buff); \ 116 } 117 118 #define INTEL_GT_SYSFS_STORE(_name, _func) \ 119 static ssize_t _name##_store_common(struct kobject *kobj, \ 120 struct attribute *attr, \ 121 const char *buff, size_t count) \ 122 { \ 123 int ret; \ 124 u32 val; \ 125 \ 126 ret = kstrtou32(buff, 0, &val); \ 127 if (ret) \ 128 return ret; \ 129 \ 130 ret = sysfs_gt_attribute_w_func(kobj, attr, _func, val); \ 131 \ 132 return ret ?: count; \ 133 } \ 134 static ssize_t _name##_store(struct kobject *kobj, \ 135 struct kobj_attribute *attr, const char *buff, \ 136 size_t count) \ 137 { \ 138 return _name##_store_common(kobj, &attr->attr, buff, count); \ 139 } \ 140 static ssize_t _name##_dev_store(struct device *dev, \ 141 struct device_attribute *attr, \ 142 const char *buff, size_t count) \ 143 { \ 144 return _name##_store_common(&dev->kobj, &attr->attr, buff, count); \ 145 } 146 147 #define INTEL_GT_SYSFS_SHOW_MAX(_name) INTEL_GT_SYSFS_SHOW(_name, max) 148 #define INTEL_GT_SYSFS_SHOW_MIN(_name) INTEL_GT_SYSFS_SHOW(_name, min) 149 150 #define INTEL_GT_ATTR_RW(_name) \ 151 static struct kobj_attribute attr_##_name = __ATTR_RW(_name) 152 153 #define INTEL_GT_ATTR_RO(_name) \ 154 static struct kobj_attribute attr_##_name = __ATTR_RO(_name) 155 156 #define INTEL_GT_DUAL_ATTR_RW(_name) \ 157 static struct device_attribute dev_attr_##_name = __ATTR(_name, 0644, \ 158 _name##_dev_show, \ 159 _name##_dev_store); \ 160 INTEL_GT_ATTR_RW(_name) 161 162 #define INTEL_GT_DUAL_ATTR_RO(_name) \ 163 static struct device_attribute dev_attr_##_name = __ATTR(_name, 0444, \ 164 _name##_dev_show, \ 165 NULL); \ 166 INTEL_GT_ATTR_RO(_name) 167 168 static u32 get_residency(struct intel_gt *gt, enum intel_rc6_res_type id) 169 { 170 intel_wakeref_t wakeref; 171 u64 res = 0; 172 173 with_intel_runtime_pm(gt->uncore->rpm, wakeref) 174 res = intel_rc6_residency_us(>->rc6, id); 175 176 return DIV_ROUND_CLOSEST_ULL(res, 1000); 177 } 178 179 static u8 get_rc6_mask(struct intel_gt *gt) 180 { 181 u8 mask = 0; 182 183 if (HAS_RC6(gt->i915)) 184 mask |= BIT(0); 185 if (HAS_RC6p(gt->i915)) 186 mask |= BIT(1); 187 if (HAS_RC6pp(gt->i915)) 188 mask |= BIT(2); 189 190 return mask; 191 } 192 193 static ssize_t rc6_enable_show(struct kobject *kobj, 194 struct kobj_attribute *attr, 195 char *buff) 196 { 197 struct intel_gt *gt = intel_gt_sysfs_get_drvdata(kobj, attr->attr.name); 198 199 return sysfs_emit(buff, "%x\n", get_rc6_mask(gt)); 200 } 201 202 static ssize_t rc6_enable_dev_show(struct device *dev, 203 struct device_attribute *attr, 204 char *buff) 205 { 206 struct intel_gt *gt = intel_gt_sysfs_get_drvdata(&dev->kobj, attr->attr.name); 207 208 return sysfs_emit(buff, "%x\n", get_rc6_mask(gt)); 209 } 210 211 static u32 __rc6_residency_ms_show(struct intel_gt *gt) 212 { 213 return get_residency(gt, INTEL_RC6_RES_RC6); 214 } 215 216 static u32 __rc6p_residency_ms_show(struct intel_gt *gt) 217 { 218 return get_residency(gt, INTEL_RC6_RES_RC6p); 219 } 220 221 static u32 __rc6pp_residency_ms_show(struct intel_gt *gt) 222 { 223 return get_residency(gt, INTEL_RC6_RES_RC6pp); 224 } 225 226 static u32 __media_rc6_residency_ms_show(struct intel_gt *gt) 227 { 228 return get_residency(gt, INTEL_RC6_RES_VLV_MEDIA); 229 } 230 231 INTEL_GT_SYSFS_SHOW_MIN(rc6_residency_ms); 232 INTEL_GT_SYSFS_SHOW_MIN(rc6p_residency_ms); 233 INTEL_GT_SYSFS_SHOW_MIN(rc6pp_residency_ms); 234 INTEL_GT_SYSFS_SHOW_MIN(media_rc6_residency_ms); 235 236 INTEL_GT_DUAL_ATTR_RO(rc6_enable); 237 INTEL_GT_DUAL_ATTR_RO(rc6_residency_ms); 238 INTEL_GT_DUAL_ATTR_RO(rc6p_residency_ms); 239 INTEL_GT_DUAL_ATTR_RO(rc6pp_residency_ms); 240 INTEL_GT_DUAL_ATTR_RO(media_rc6_residency_ms); 241 242 static struct attribute *rc6_attrs[] = { 243 &attr_rc6_enable.attr, 244 &attr_rc6_residency_ms.attr, 245 NULL 246 }; 247 248 static struct attribute *rc6p_attrs[] = { 249 &attr_rc6p_residency_ms.attr, 250 &attr_rc6pp_residency_ms.attr, 251 NULL 252 }; 253 254 static struct attribute *media_rc6_attrs[] = { 255 &attr_media_rc6_residency_ms.attr, 256 NULL 257 }; 258 259 static struct attribute *rc6_dev_attrs[] = { 260 &dev_attr_rc6_enable.attr, 261 &dev_attr_rc6_residency_ms.attr, 262 NULL 263 }; 264 265 static struct attribute *rc6p_dev_attrs[] = { 266 &dev_attr_rc6p_residency_ms.attr, 267 &dev_attr_rc6pp_residency_ms.attr, 268 NULL 269 }; 270 271 static struct attribute *media_rc6_dev_attrs[] = { 272 &dev_attr_media_rc6_residency_ms.attr, 273 NULL 274 }; 275 276 static const struct attribute_group rc6_attr_group[] = { 277 { .attrs = rc6_attrs, }, 278 { .name = power_group_name, .attrs = rc6_dev_attrs, }, 279 }; 280 281 static const struct attribute_group rc6p_attr_group[] = { 282 { .attrs = rc6p_attrs, }, 283 { .name = power_group_name, .attrs = rc6p_dev_attrs, }, 284 }; 285 286 static const struct attribute_group media_rc6_attr_group[] = { 287 { .attrs = media_rc6_attrs, }, 288 { .name = power_group_name, .attrs = media_rc6_dev_attrs, }, 289 }; 290 291 static int __intel_gt_sysfs_create_group(struct kobject *kobj, 292 const struct attribute_group *grp) 293 { 294 return is_object_gt(kobj) ? 295 sysfs_create_group(kobj, &grp[0]) : 296 sysfs_merge_group(kobj, &grp[1]); 297 } 298 299 static void intel_sysfs_rc6_init(struct intel_gt *gt, struct kobject *kobj) 300 { 301 int ret; 302 303 if (!IS_ENABLED(CONFIG_PM) || !HAS_RC6(gt->i915)) 304 return; 305 306 ret = __intel_gt_sysfs_create_group(kobj, rc6_attr_group); 307 if (ret) 308 gt_warn(gt, "failed to create RC6 sysfs files (%pe)\n", ERR_PTR(ret)); 309 310 /* 311 * cannot use the is_visible() attribute because 312 * the upper object inherits from the parent group. 313 */ 314 if (HAS_RC6p(gt->i915)) { 315 ret = __intel_gt_sysfs_create_group(kobj, rc6p_attr_group); 316 if (ret) 317 gt_warn(gt, "failed to create RC6p sysfs files (%pe)\n", ERR_PTR(ret)); 318 } 319 320 if (IS_VALLEYVIEW(gt->i915) || IS_CHERRYVIEW(gt->i915)) { 321 ret = __intel_gt_sysfs_create_group(kobj, media_rc6_attr_group); 322 if (ret) 323 gt_warn(gt, "failed to create media RC6 sysfs files (%pe)\n", ERR_PTR(ret)); 324 } 325 } 326 327 static u32 __act_freq_mhz_show(struct intel_gt *gt) 328 { 329 return intel_rps_read_actual_frequency(>->rps); 330 } 331 332 static u32 __cur_freq_mhz_show(struct intel_gt *gt) 333 { 334 return intel_rps_get_requested_frequency(>->rps); 335 } 336 337 static u32 __boost_freq_mhz_show(struct intel_gt *gt) 338 { 339 return intel_rps_get_boost_frequency(>->rps); 340 } 341 342 static int __boost_freq_mhz_store(struct intel_gt *gt, u32 val) 343 { 344 return intel_rps_set_boost_frequency(>->rps, val); 345 } 346 347 static u32 __RP0_freq_mhz_show(struct intel_gt *gt) 348 { 349 return intel_rps_get_rp0_frequency(>->rps); 350 } 351 352 static u32 __RPn_freq_mhz_show(struct intel_gt *gt) 353 { 354 return intel_rps_get_rpn_frequency(>->rps); 355 } 356 357 static u32 __RP1_freq_mhz_show(struct intel_gt *gt) 358 { 359 return intel_rps_get_rp1_frequency(>->rps); 360 } 361 362 static u32 __max_freq_mhz_show(struct intel_gt *gt) 363 { 364 return intel_rps_get_max_frequency(>->rps); 365 } 366 367 static int __set_max_freq(struct intel_gt *gt, u32 val) 368 { 369 return intel_rps_set_max_frequency(>->rps, val); 370 } 371 372 static u32 __min_freq_mhz_show(struct intel_gt *gt) 373 { 374 return intel_rps_get_min_frequency(>->rps); 375 } 376 377 static int __set_min_freq(struct intel_gt *gt, u32 val) 378 { 379 return intel_rps_set_min_frequency(>->rps, val); 380 } 381 382 static u32 __vlv_rpe_freq_mhz_show(struct intel_gt *gt) 383 { 384 struct intel_rps *rps = >->rps; 385 386 return intel_gpu_freq(rps, rps->efficient_freq); 387 } 388 389 INTEL_GT_SYSFS_SHOW_MAX(act_freq_mhz); 390 INTEL_GT_SYSFS_SHOW_MAX(boost_freq_mhz); 391 INTEL_GT_SYSFS_SHOW_MAX(cur_freq_mhz); 392 INTEL_GT_SYSFS_SHOW_MAX(RP0_freq_mhz); 393 INTEL_GT_SYSFS_SHOW_MAX(RP1_freq_mhz); 394 INTEL_GT_SYSFS_SHOW_MAX(RPn_freq_mhz); 395 INTEL_GT_SYSFS_SHOW_MAX(max_freq_mhz); 396 INTEL_GT_SYSFS_SHOW_MIN(min_freq_mhz); 397 INTEL_GT_SYSFS_SHOW_MAX(vlv_rpe_freq_mhz); 398 INTEL_GT_SYSFS_STORE(boost_freq_mhz, __boost_freq_mhz_store); 399 INTEL_GT_SYSFS_STORE(max_freq_mhz, __set_max_freq); 400 INTEL_GT_SYSFS_STORE(min_freq_mhz, __set_min_freq); 401 402 #define INTEL_GT_RPS_SYSFS_ATTR(_name, _mode, _show, _store, _show_dev, _store_dev) \ 403 static struct device_attribute dev_attr_gt_##_name = __ATTR(gt_##_name, _mode, \ 404 _show_dev, _store_dev); \ 405 static struct kobj_attribute attr_rps_##_name = __ATTR(rps_##_name, _mode, \ 406 _show, _store) 407 408 #define INTEL_GT_RPS_SYSFS_ATTR_RO(_name) \ 409 INTEL_GT_RPS_SYSFS_ATTR(_name, 0444, _name##_show, NULL, \ 410 _name##_dev_show, NULL) 411 #define INTEL_GT_RPS_SYSFS_ATTR_RW(_name) \ 412 INTEL_GT_RPS_SYSFS_ATTR(_name, 0644, _name##_show, _name##_store, \ 413 _name##_dev_show, _name##_dev_store) 414 415 /* The below macros generate static structures */ 416 INTEL_GT_RPS_SYSFS_ATTR_RO(act_freq_mhz); 417 INTEL_GT_RPS_SYSFS_ATTR_RO(cur_freq_mhz); 418 INTEL_GT_RPS_SYSFS_ATTR_RW(boost_freq_mhz); 419 INTEL_GT_RPS_SYSFS_ATTR_RO(RP0_freq_mhz); 420 INTEL_GT_RPS_SYSFS_ATTR_RO(RP1_freq_mhz); 421 INTEL_GT_RPS_SYSFS_ATTR_RO(RPn_freq_mhz); 422 INTEL_GT_RPS_SYSFS_ATTR_RW(max_freq_mhz); 423 INTEL_GT_RPS_SYSFS_ATTR_RW(min_freq_mhz); 424 INTEL_GT_RPS_SYSFS_ATTR_RO(vlv_rpe_freq_mhz); 425 426 #define GEN6_ATTR(p, s) { \ 427 &p##attr_##s##_act_freq_mhz.attr, \ 428 &p##attr_##s##_cur_freq_mhz.attr, \ 429 &p##attr_##s##_boost_freq_mhz.attr, \ 430 &p##attr_##s##_max_freq_mhz.attr, \ 431 &p##attr_##s##_min_freq_mhz.attr, \ 432 &p##attr_##s##_RP0_freq_mhz.attr, \ 433 &p##attr_##s##_RP1_freq_mhz.attr, \ 434 &p##attr_##s##_RPn_freq_mhz.attr, \ 435 NULL, \ 436 } 437 438 #define GEN6_RPS_ATTR GEN6_ATTR(, rps) 439 #define GEN6_GT_ATTR GEN6_ATTR(dev_, gt) 440 441 static const struct attribute * const gen6_rps_attrs[] = GEN6_RPS_ATTR; 442 static const struct attribute * const gen6_gt_attrs[] = GEN6_GT_ATTR; 443 444 static ssize_t punit_req_freq_mhz_show(struct kobject *kobj, 445 struct kobj_attribute *attr, 446 char *buff) 447 { 448 struct intel_gt *gt = intel_gt_sysfs_get_drvdata(kobj, attr->attr.name); 449 u32 preq = intel_rps_read_punit_req_frequency(>->rps); 450 451 return sysfs_emit(buff, "%u\n", preq); 452 } 453 454 static ssize_t slpc_ignore_eff_freq_show(struct kobject *kobj, 455 struct kobj_attribute *attr, 456 char *buff) 457 { 458 struct intel_gt *gt = intel_gt_sysfs_get_drvdata(kobj, attr->attr.name); 459 struct intel_guc_slpc *slpc = >->uc.guc.slpc; 460 461 return sysfs_emit(buff, "%u\n", slpc->ignore_eff_freq); 462 } 463 464 static ssize_t slpc_ignore_eff_freq_store(struct kobject *kobj, 465 struct kobj_attribute *attr, 466 const char *buff, size_t count) 467 { 468 struct intel_gt *gt = intel_gt_sysfs_get_drvdata(kobj, attr->attr.name); 469 struct intel_guc_slpc *slpc = >->uc.guc.slpc; 470 int err; 471 u32 val; 472 473 err = kstrtou32(buff, 0, &val); 474 if (err) 475 return err; 476 477 err = intel_guc_slpc_set_ignore_eff_freq(slpc, val); 478 return err ?: count; 479 } 480 481 struct intel_gt_bool_throttle_attr { 482 struct attribute attr; 483 ssize_t (*show)(struct kobject *kobj, struct kobj_attribute *attr, 484 char *buf); 485 i915_reg_t (*reg32)(struct intel_gt *gt); 486 u32 mask; 487 }; 488 489 static ssize_t throttle_reason_bool_show(struct kobject *kobj, 490 struct kobj_attribute *attr, 491 char *buff) 492 { 493 struct intel_gt *gt = intel_gt_sysfs_get_drvdata(kobj, attr->attr.name); 494 struct intel_gt_bool_throttle_attr *t_attr = 495 (struct intel_gt_bool_throttle_attr *) attr; 496 bool val = rps_read_mask_mmio(>->rps, t_attr->reg32(gt), t_attr->mask); 497 498 return sysfs_emit(buff, "%u\n", val); 499 } 500 501 #define INTEL_GT_RPS_BOOL_ATTR_RO(sysfs_func__, mask__) \ 502 struct intel_gt_bool_throttle_attr attr_##sysfs_func__ = { \ 503 .attr = { .name = __stringify(sysfs_func__), .mode = 0444 }, \ 504 .show = throttle_reason_bool_show, \ 505 .reg32 = intel_gt_perf_limit_reasons_reg, \ 506 .mask = mask__, \ 507 } 508 509 INTEL_GT_ATTR_RO(punit_req_freq_mhz); 510 static INTEL_GT_RPS_BOOL_ATTR_RO(throttle_reason_status, GT0_PERF_LIMIT_REASONS_MASK); 511 static INTEL_GT_RPS_BOOL_ATTR_RO(throttle_reason_pl1, POWER_LIMIT_1_MASK); 512 static INTEL_GT_RPS_BOOL_ATTR_RO(throttle_reason_pl2, POWER_LIMIT_2_MASK); 513 static INTEL_GT_RPS_BOOL_ATTR_RO(throttle_reason_pl4, POWER_LIMIT_4_MASK); 514 static INTEL_GT_RPS_BOOL_ATTR_RO(throttle_reason_thermal, THERMAL_LIMIT_MASK); 515 static INTEL_GT_RPS_BOOL_ATTR_RO(throttle_reason_prochot, PROCHOT_MASK); 516 static INTEL_GT_RPS_BOOL_ATTR_RO(throttle_reason_ratl, RATL_MASK); 517 static INTEL_GT_RPS_BOOL_ATTR_RO(throttle_reason_vr_thermalert, VR_THERMALERT_MASK); 518 static INTEL_GT_RPS_BOOL_ATTR_RO(throttle_reason_vr_tdc, VR_TDC_MASK); 519 520 static const struct attribute *throttle_reason_attrs[] = { 521 &attr_throttle_reason_status.attr, 522 &attr_throttle_reason_pl1.attr, 523 &attr_throttle_reason_pl2.attr, 524 &attr_throttle_reason_pl4.attr, 525 &attr_throttle_reason_thermal.attr, 526 &attr_throttle_reason_prochot.attr, 527 &attr_throttle_reason_ratl.attr, 528 &attr_throttle_reason_vr_thermalert.attr, 529 &attr_throttle_reason_vr_tdc.attr, 530 NULL 531 }; 532 533 /* 534 * Scaling for multipliers (aka frequency factors). 535 * The format of the value in the register is u8.8. 536 * 537 * The presentation to userspace is inspired by the perf event framework. 538 * See: 539 * Documentation/ABI/testing/sysfs-bus-event_source-devices-events 540 * for description of: 541 * /sys/bus/event_source/devices/<pmu>/events/<event>.scale 542 * 543 * Summary: Expose two sysfs files for each multiplier. 544 * 545 * 1. File <attr> contains a raw hardware value. 546 * 2. File <attr>.scale contains the multiplicative scale factor to be 547 * used by userspace to compute the actual value. 548 * 549 * So userspace knows that to get the frequency_factor it multiplies the 550 * provided value by the specified scale factor and vice-versa. 551 * 552 * That way there is no precision loss in the kernel interface and API 553 * is future proof should one day the hardware register change to u16.u16, 554 * on some platform. (Or any other fixed point representation.) 555 * 556 * Example: 557 * File <attr> contains the value 2.5, represented as u8.8 0x0280, which 558 * is comprised of: 559 * - an integer part of 2 560 * - a fractional part of 0x80 (representing 0x80 / 2^8 == 0x80 / 256). 561 * File <attr>.scale contains a string representation of floating point 562 * value 0.00390625 (which is (1 / 256)). 563 * Userspace computes the actual value: 564 * 0x0280 * 0.00390625 -> 2.5 565 * or converts an actual value to the value to be written into <attr>: 566 * 2.5 / 0.00390625 -> 0x0280 567 */ 568 569 #define U8_8_VAL_MASK 0xffff 570 #define U8_8_SCALE_TO_VALUE "0.00390625" 571 572 static ssize_t freq_factor_scale_show(struct kobject *kobj, 573 struct kobj_attribute *attr, 574 char *buff) 575 { 576 return sysfs_emit(buff, "%s\n", U8_8_SCALE_TO_VALUE); 577 } 578 579 static u32 media_ratio_mode_to_factor(u32 mode) 580 { 581 /* 0 -> 0, 1 -> 256, 2 -> 128 */ 582 return !mode ? mode : 256 / mode; 583 } 584 585 static ssize_t media_freq_factor_show(struct kobject *kobj, 586 struct kobj_attribute *attr, 587 char *buff) 588 { 589 struct intel_gt *gt = intel_gt_sysfs_get_drvdata(kobj, attr->attr.name); 590 struct intel_guc_slpc *slpc = >->uc.guc.slpc; 591 intel_wakeref_t wakeref; 592 u32 mode; 593 594 /* 595 * Retrieve media_ratio_mode from GEN6_RPNSWREQ bit 13 set by 596 * GuC. GEN6_RPNSWREQ:13 value 0 represents 1:2 and 1 represents 1:1 597 */ 598 if (IS_XEHPSDV(gt->i915) && 599 slpc->media_ratio_mode == SLPC_MEDIA_RATIO_MODE_DYNAMIC_CONTROL) { 600 /* 601 * For XEHPSDV dynamic mode GEN6_RPNSWREQ:13 does not contain 602 * the media_ratio_mode, just return the cached media ratio 603 */ 604 mode = slpc->media_ratio_mode; 605 } else { 606 with_intel_runtime_pm(gt->uncore->rpm, wakeref) 607 mode = intel_uncore_read(gt->uncore, GEN6_RPNSWREQ); 608 mode = REG_FIELD_GET(GEN12_MEDIA_FREQ_RATIO, mode) ? 609 SLPC_MEDIA_RATIO_MODE_FIXED_ONE_TO_ONE : 610 SLPC_MEDIA_RATIO_MODE_FIXED_ONE_TO_TWO; 611 } 612 613 return sysfs_emit(buff, "%u\n", media_ratio_mode_to_factor(mode)); 614 } 615 616 static ssize_t media_freq_factor_store(struct kobject *kobj, 617 struct kobj_attribute *attr, 618 const char *buff, size_t count) 619 { 620 struct intel_gt *gt = intel_gt_sysfs_get_drvdata(kobj, attr->attr.name); 621 struct intel_guc_slpc *slpc = >->uc.guc.slpc; 622 u32 factor, mode; 623 int err; 624 625 err = kstrtou32(buff, 0, &factor); 626 if (err) 627 return err; 628 629 for (mode = SLPC_MEDIA_RATIO_MODE_DYNAMIC_CONTROL; 630 mode <= SLPC_MEDIA_RATIO_MODE_FIXED_ONE_TO_TWO; mode++) 631 if (factor == media_ratio_mode_to_factor(mode)) 632 break; 633 634 if (mode > SLPC_MEDIA_RATIO_MODE_FIXED_ONE_TO_TWO) 635 return -EINVAL; 636 637 err = intel_guc_slpc_set_media_ratio_mode(slpc, mode); 638 if (!err) { 639 slpc->media_ratio_mode = mode; 640 DRM_DEBUG("Set slpc->media_ratio_mode to %d", mode); 641 } 642 return err ?: count; 643 } 644 645 static ssize_t media_RP0_freq_mhz_show(struct kobject *kobj, 646 struct kobj_attribute *attr, 647 char *buff) 648 { 649 struct intel_gt *gt = intel_gt_sysfs_get_drvdata(kobj, attr->attr.name); 650 u32 val; 651 int err; 652 653 err = snb_pcode_read_p(gt->uncore, XEHP_PCODE_FREQUENCY_CONFIG, 654 PCODE_MBOX_FC_SC_READ_FUSED_P0, 655 PCODE_MBOX_DOMAIN_MEDIAFF, &val); 656 657 if (err) 658 return err; 659 660 /* Fused media RP0 read from pcode is in units of 50 MHz */ 661 val *= GT_FREQUENCY_MULTIPLIER; 662 663 return sysfs_emit(buff, "%u\n", val); 664 } 665 666 static ssize_t media_RPn_freq_mhz_show(struct kobject *kobj, 667 struct kobj_attribute *attr, 668 char *buff) 669 { 670 struct intel_gt *gt = intel_gt_sysfs_get_drvdata(kobj, attr->attr.name); 671 u32 val; 672 int err; 673 674 err = snb_pcode_read_p(gt->uncore, XEHP_PCODE_FREQUENCY_CONFIG, 675 PCODE_MBOX_FC_SC_READ_FUSED_PN, 676 PCODE_MBOX_DOMAIN_MEDIAFF, &val); 677 678 if (err) 679 return err; 680 681 /* Fused media RPn read from pcode is in units of 50 MHz */ 682 val *= GT_FREQUENCY_MULTIPLIER; 683 684 return sysfs_emit(buff, "%u\n", val); 685 } 686 687 INTEL_GT_ATTR_RW(media_freq_factor); 688 static struct kobj_attribute attr_media_freq_factor_scale = 689 __ATTR(media_freq_factor.scale, 0444, freq_factor_scale_show, NULL); 690 INTEL_GT_ATTR_RO(media_RP0_freq_mhz); 691 INTEL_GT_ATTR_RO(media_RPn_freq_mhz); 692 693 INTEL_GT_ATTR_RW(slpc_ignore_eff_freq); 694 695 static const struct attribute *media_perf_power_attrs[] = { 696 &attr_media_freq_factor.attr, 697 &attr_media_freq_factor_scale.attr, 698 &attr_media_RP0_freq_mhz.attr, 699 &attr_media_RPn_freq_mhz.attr, 700 NULL 701 }; 702 703 static ssize_t 704 default_min_freq_mhz_show(struct kobject *kobj, struct kobj_attribute *attr, char *buf) 705 { 706 struct intel_gt *gt = kobj_to_gt(kobj->parent); 707 708 return sysfs_emit(buf, "%u\n", gt->defaults.min_freq); 709 } 710 711 static struct kobj_attribute default_min_freq_mhz = 712 __ATTR(rps_min_freq_mhz, 0444, default_min_freq_mhz_show, NULL); 713 714 static ssize_t 715 default_max_freq_mhz_show(struct kobject *kobj, struct kobj_attribute *attr, char *buf) 716 { 717 struct intel_gt *gt = kobj_to_gt(kobj->parent); 718 719 return sysfs_emit(buf, "%u\n", gt->defaults.max_freq); 720 } 721 722 static struct kobj_attribute default_max_freq_mhz = 723 __ATTR(rps_max_freq_mhz, 0444, default_max_freq_mhz_show, NULL); 724 725 static const struct attribute * const rps_defaults_attrs[] = { 726 &default_min_freq_mhz.attr, 727 &default_max_freq_mhz.attr, 728 NULL 729 }; 730 731 static int intel_sysfs_rps_init(struct intel_gt *gt, struct kobject *kobj) 732 { 733 const struct attribute * const *attrs; 734 struct attribute *vlv_attr; 735 int ret; 736 737 if (GRAPHICS_VER(gt->i915) < 6) 738 return 0; 739 740 if (is_object_gt(kobj)) { 741 attrs = gen6_rps_attrs; 742 vlv_attr = &attr_rps_vlv_rpe_freq_mhz.attr; 743 } else { 744 attrs = gen6_gt_attrs; 745 vlv_attr = &dev_attr_gt_vlv_rpe_freq_mhz.attr; 746 } 747 748 ret = sysfs_create_files(kobj, attrs); 749 if (ret) 750 return ret; 751 752 if (IS_VALLEYVIEW(gt->i915) || IS_CHERRYVIEW(gt->i915)) 753 ret = sysfs_create_file(kobj, vlv_attr); 754 755 return ret; 756 } 757 758 void intel_gt_sysfs_pm_init(struct intel_gt *gt, struct kobject *kobj) 759 { 760 int ret; 761 762 intel_sysfs_rc6_init(gt, kobj); 763 764 ret = intel_sysfs_rps_init(gt, kobj); 765 if (ret) 766 gt_warn(gt, "failed to create RPS sysfs files (%pe)", ERR_PTR(ret)); 767 768 /* end of the legacy interfaces */ 769 if (!is_object_gt(kobj)) 770 return; 771 772 ret = sysfs_create_file(kobj, &attr_punit_req_freq_mhz.attr); 773 if (ret) 774 gt_warn(gt, "failed to create punit_req_freq_mhz sysfs (%pe)", ERR_PTR(ret)); 775 776 if (intel_uc_uses_guc_slpc(>->uc)) { 777 ret = sysfs_create_file(kobj, &attr_slpc_ignore_eff_freq.attr); 778 if (ret) 779 gt_warn(gt, "failed to create ignore_eff_freq sysfs (%pe)", ERR_PTR(ret)); 780 } 781 782 if (i915_mmio_reg_valid(intel_gt_perf_limit_reasons_reg(gt))) { 783 ret = sysfs_create_files(kobj, throttle_reason_attrs); 784 if (ret) 785 gt_warn(gt, "failed to create throttle sysfs files (%pe)", ERR_PTR(ret)); 786 } 787 788 if (HAS_MEDIA_RATIO_MODE(gt->i915) && intel_uc_uses_guc_slpc(>->uc)) { 789 ret = sysfs_create_files(kobj, media_perf_power_attrs); 790 if (ret) 791 gt_warn(gt, "failed to create media_perf_power_attrs sysfs (%pe)\n", 792 ERR_PTR(ret)); 793 } 794 795 ret = sysfs_create_files(gt->sysfs_defaults, rps_defaults_attrs); 796 if (ret) 797 gt_warn(gt, "failed to add rps defaults (%pe)\n", ERR_PTR(ret)); 798 } 799