| 1 | /* $NetBSD: nouveau_subdev_clock_base.c,v 1.2 2015/02/25 17:29:43 riastradh Exp $ */ |
| 2 | |
| 3 | /* |
| 4 | * Copyright 2013 Red Hat Inc. |
| 5 | * |
| 6 | * Permission is hereby granted, free of charge, to any person obtaining a |
| 7 | * copy of this software and associated documentation files (the "Software"), |
| 8 | * to deal in the Software without restriction, including without limitation |
| 9 | * the rights to use, copy, modify, merge, publish, distribute, sublicense, |
| 10 | * and/or sell copies of the Software, and to permit persons to whom the |
| 11 | * Software is furnished to do so, subject to the following conditions: |
| 12 | * |
| 13 | * The above copyright notice and this permission notice shall be included in |
| 14 | * all copies or substantial portions of the Software. |
| 15 | * |
| 16 | * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR |
| 17 | * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, |
| 18 | * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL |
| 19 | * THE COPYRIGHT HOLDER(S) OR AUTHOR(S) BE LIABLE FOR ANY CLAIM, DAMAGES OR |
| 20 | * OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, |
| 21 | * ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR |
| 22 | * OTHER DEALINGS IN THE SOFTWARE. |
| 23 | * |
| 24 | * Authors: Ben Skeggs |
| 25 | */ |
| 26 | |
| 27 | #include <sys/cdefs.h> |
| 28 | __KERNEL_RCSID(0, "$NetBSD: nouveau_subdev_clock_base.c,v 1.2 2015/02/25 17:29:43 riastradh Exp $" ); |
| 29 | |
| 30 | #include <core/option.h> |
| 31 | |
| 32 | #include <subdev/clock.h> |
| 33 | #include <subdev/therm.h> |
| 34 | #include <subdev/volt.h> |
| 35 | #include <subdev/fb.h> |
| 36 | |
| 37 | #include <subdev/bios.h> |
| 38 | #include <subdev/bios/boost.h> |
| 39 | #include <subdev/bios/cstep.h> |
| 40 | #include <subdev/bios/perf.h> |
| 41 | |
| 42 | /****************************************************************************** |
| 43 | * misc |
| 44 | *****************************************************************************/ |
| 45 | static u32 |
| 46 | nouveau_clock_adjust(struct nouveau_clock *clk, bool adjust, |
| 47 | u8 pstate, u8 domain, u32 input) |
| 48 | { |
| 49 | struct nouveau_bios *bios = nouveau_bios(clk); |
| 50 | struct nvbios_boostE boostE; |
| 51 | u8 ver, hdr, cnt, len; |
| 52 | u16 data; |
| 53 | |
| 54 | data = nvbios_boostEm(bios, pstate, &ver, &hdr, &cnt, &len, &boostE); |
| 55 | if (data) { |
| 56 | struct nvbios_boostS boostS; |
| 57 | u8 idx = 0, sver, shdr; |
| 58 | u16 subd; |
| 59 | |
| 60 | input = max(boostE.min, input); |
| 61 | input = min(boostE.max, input); |
| 62 | do { |
| 63 | sver = ver; |
| 64 | shdr = hdr; |
| 65 | subd = nvbios_boostSp(bios, idx++, data, &sver, &shdr, |
| 66 | cnt, len, &boostS); |
| 67 | if (subd && boostS.domain == domain) { |
| 68 | if (adjust) |
| 69 | input = input * boostS.percent / 100; |
| 70 | input = max(boostS.min, input); |
| 71 | input = min(boostS.max, input); |
| 72 | break; |
| 73 | } |
| 74 | } while (subd); |
| 75 | } |
| 76 | |
| 77 | return input; |
| 78 | } |
| 79 | |
| 80 | /****************************************************************************** |
| 81 | * C-States |
| 82 | *****************************************************************************/ |
| 83 | static int |
| 84 | nouveau_cstate_prog(struct nouveau_clock *clk, |
| 85 | struct nouveau_pstate *pstate, int cstatei) |
| 86 | { |
| 87 | struct nouveau_therm *ptherm = nouveau_therm(clk); |
| 88 | struct nouveau_volt *volt = nouveau_volt(clk); |
| 89 | struct nouveau_cstate *cstate; |
| 90 | int ret; |
| 91 | |
| 92 | if (!list_empty(&pstate->list)) { |
| 93 | cstate = list_entry(pstate->list.prev, typeof(*cstate), head); |
| 94 | } else { |
| 95 | cstate = &pstate->base; |
| 96 | } |
| 97 | |
| 98 | ret = nouveau_therm_cstate(ptherm, pstate->fanspeed, +1); |
| 99 | if (ret && ret != -ENODEV) { |
| 100 | nv_error(clk, "failed to raise fan speed: %d\n" , ret); |
| 101 | return ret; |
| 102 | } |
| 103 | |
| 104 | ret = volt->set_id(volt, cstate->voltage, +1); |
| 105 | if (ret && ret != -ENODEV) { |
| 106 | nv_error(clk, "failed to raise voltage: %d\n" , ret); |
| 107 | return ret; |
| 108 | } |
| 109 | |
| 110 | ret = clk->calc(clk, cstate); |
| 111 | if (ret == 0) { |
| 112 | ret = clk->prog(clk); |
| 113 | clk->tidy(clk); |
| 114 | } |
| 115 | |
| 116 | ret = volt->set_id(volt, cstate->voltage, -1); |
| 117 | if (ret && ret != -ENODEV) |
| 118 | nv_error(clk, "failed to lower voltage: %d\n" , ret); |
| 119 | |
| 120 | ret = nouveau_therm_cstate(ptherm, pstate->fanspeed, -1); |
| 121 | if (ret && ret != -ENODEV) |
| 122 | nv_error(clk, "failed to lower fan speed: %d\n" , ret); |
| 123 | |
| 124 | return 0; |
| 125 | } |
| 126 | |
| 127 | static void |
| 128 | nouveau_cstate_del(struct nouveau_cstate *cstate) |
| 129 | { |
| 130 | list_del(&cstate->head); |
| 131 | kfree(cstate); |
| 132 | } |
| 133 | |
| 134 | static int |
| 135 | nouveau_cstate_new(struct nouveau_clock *clk, int idx, |
| 136 | struct nouveau_pstate *pstate) |
| 137 | { |
| 138 | struct nouveau_bios *bios = nouveau_bios(clk); |
| 139 | struct nouveau_clocks *domain = clk->domains; |
| 140 | struct nouveau_cstate *cstate = NULL; |
| 141 | struct nvbios_cstepX cstepX; |
| 142 | u8 ver, hdr; |
| 143 | u16 data; |
| 144 | |
| 145 | data = nvbios_cstepXp(bios, idx, &ver, &hdr, &cstepX); |
| 146 | if (!data) |
| 147 | return -ENOENT; |
| 148 | |
| 149 | cstate = kzalloc(sizeof(*cstate), GFP_KERNEL); |
| 150 | if (!cstate) |
| 151 | return -ENOMEM; |
| 152 | |
| 153 | *cstate = pstate->base; |
| 154 | cstate->voltage = cstepX.voltage; |
| 155 | |
| 156 | while (domain && domain->name != nv_clk_src_max) { |
| 157 | if (domain->flags & NVKM_CLK_DOM_FLAG_CORE) { |
| 158 | u32 freq = nouveau_clock_adjust(clk, true, |
| 159 | pstate->pstate, |
| 160 | domain->bios, |
| 161 | cstepX.freq); |
| 162 | cstate->domain[domain->name] = freq; |
| 163 | } |
| 164 | domain++; |
| 165 | } |
| 166 | |
| 167 | list_add(&cstate->head, &pstate->list); |
| 168 | return 0; |
| 169 | } |
| 170 | |
| 171 | /****************************************************************************** |
| 172 | * P-States |
| 173 | *****************************************************************************/ |
| 174 | static int |
| 175 | nouveau_pstate_prog(struct nouveau_clock *clk, int pstatei) |
| 176 | { |
| 177 | struct nouveau_fb *pfb = nouveau_fb(clk); |
| 178 | struct nouveau_pstate *pstate; |
| 179 | int ret, idx = 0; |
| 180 | |
| 181 | list_for_each_entry(pstate, &clk->states, head) { |
| 182 | if (idx++ == pstatei) |
| 183 | break; |
| 184 | } |
| 185 | |
| 186 | nv_debug(clk, "setting performance state %d\n" , pstatei); |
| 187 | clk->pstate = pstatei; |
| 188 | |
| 189 | if (pfb->ram->calc) { |
| 190 | int khz = pstate->base.domain[nv_clk_src_mem]; |
| 191 | do { |
| 192 | ret = pfb->ram->calc(pfb, khz); |
| 193 | if (ret == 0) |
| 194 | ret = pfb->ram->prog(pfb); |
| 195 | } while (ret > 0); |
| 196 | pfb->ram->tidy(pfb); |
| 197 | } |
| 198 | |
| 199 | return nouveau_cstate_prog(clk, pstate, 0); |
| 200 | } |
| 201 | |
| 202 | static int |
| 203 | nouveau_pstate_calc(struct nouveau_clock *clk) |
| 204 | { |
| 205 | int pstate, ret = 0; |
| 206 | |
| 207 | nv_trace(clk, "P %d U %d A %d T %d D %d\n" , clk->pstate, |
| 208 | clk->ustate, clk->astate, clk->tstate, clk->dstate); |
| 209 | |
| 210 | if (clk->state_nr && clk->ustate != -1) { |
| 211 | pstate = (clk->ustate < 0) ? clk->astate : clk->ustate; |
| 212 | pstate = min(pstate, clk->state_nr - 1 - clk->tstate); |
| 213 | pstate = max(pstate, clk->dstate); |
| 214 | } else { |
| 215 | pstate = clk->pstate = -1; |
| 216 | } |
| 217 | |
| 218 | nv_trace(clk, "-> %d\n" , pstate); |
| 219 | if (pstate != clk->pstate) |
| 220 | ret = nouveau_pstate_prog(clk, pstate); |
| 221 | return ret; |
| 222 | } |
| 223 | |
| 224 | static void |
| 225 | nouveau_pstate_info(struct nouveau_clock *clk, struct nouveau_pstate *pstate) |
| 226 | { |
| 227 | struct nouveau_clocks *clock = clk->domains - 1; |
| 228 | struct nouveau_cstate *cstate; |
| 229 | char info[3][32] = { "" , "" , "" }; |
| 230 | char name[4] = "--" ; |
| 231 | int i = -1; |
| 232 | |
| 233 | if (pstate->pstate != 0xff) |
| 234 | snprintf(name, sizeof(name), "%02x" , pstate->pstate); |
| 235 | |
| 236 | while ((++clock)->name != nv_clk_src_max) { |
| 237 | u32 lo = pstate->base.domain[clock->name]; |
| 238 | u32 hi = lo; |
| 239 | if (hi == 0) |
| 240 | continue; |
| 241 | |
| 242 | nv_debug(clk, "%02x: %10d KHz\n" , clock->name, lo); |
| 243 | list_for_each_entry(cstate, &pstate->list, head) { |
| 244 | u32 freq = cstate->domain[clock->name]; |
| 245 | lo = min(lo, freq); |
| 246 | hi = max(hi, freq); |
| 247 | nv_debug(clk, "%10d KHz\n" , freq); |
| 248 | } |
| 249 | |
| 250 | if (clock->mname && ++i < ARRAY_SIZE(info)) { |
| 251 | lo /= clock->mdiv; |
| 252 | hi /= clock->mdiv; |
| 253 | if (lo == hi) { |
| 254 | snprintf(info[i], sizeof(info[i]), "%s %d MHz" , |
| 255 | clock->mname, lo); |
| 256 | } else { |
| 257 | snprintf(info[i], sizeof(info[i]), |
| 258 | "%s %d-%d MHz" , clock->mname, lo, hi); |
| 259 | } |
| 260 | } |
| 261 | } |
| 262 | |
| 263 | nv_info(clk, "%s: %s %s %s\n" , name, info[0], info[1], info[2]); |
| 264 | } |
| 265 | |
| 266 | static void |
| 267 | nouveau_pstate_del(struct nouveau_pstate *pstate) |
| 268 | { |
| 269 | struct nouveau_cstate *cstate, *temp; |
| 270 | |
| 271 | list_for_each_entry_safe(cstate, temp, &pstate->list, head) { |
| 272 | nouveau_cstate_del(cstate); |
| 273 | } |
| 274 | |
| 275 | list_del(&pstate->head); |
| 276 | kfree(pstate); |
| 277 | } |
| 278 | |
| 279 | static int |
| 280 | nouveau_pstate_new(struct nouveau_clock *clk, int idx) |
| 281 | { |
| 282 | struct nouveau_bios *bios = nouveau_bios(clk); |
| 283 | struct nouveau_clocks *domain = clk->domains - 1; |
| 284 | struct nouveau_pstate *pstate; |
| 285 | struct nouveau_cstate *cstate; |
| 286 | struct nvbios_cstepE cstepE; |
| 287 | struct nvbios_perfE perfE; |
| 288 | u8 ver, hdr, cnt, len; |
| 289 | u16 data; |
| 290 | |
| 291 | data = nvbios_perfEp(bios, idx, &ver, &hdr, &cnt, &len, &perfE); |
| 292 | if (!data) |
| 293 | return -EINVAL; |
| 294 | if (perfE.pstate == 0xff) |
| 295 | return 0; |
| 296 | |
| 297 | pstate = kzalloc(sizeof(*pstate), GFP_KERNEL); |
| 298 | cstate = &pstate->base; |
| 299 | if (!pstate) |
| 300 | return -ENOMEM; |
| 301 | |
| 302 | INIT_LIST_HEAD(&pstate->list); |
| 303 | |
| 304 | pstate->pstate = perfE.pstate; |
| 305 | pstate->fanspeed = perfE.fanspeed; |
| 306 | cstate->voltage = perfE.voltage; |
| 307 | cstate->domain[nv_clk_src_core] = perfE.core; |
| 308 | cstate->domain[nv_clk_src_shader] = perfE.shader; |
| 309 | cstate->domain[nv_clk_src_mem] = perfE.memory; |
| 310 | cstate->domain[nv_clk_src_vdec] = perfE.vdec; |
| 311 | cstate->domain[nv_clk_src_dom6] = perfE.disp; |
| 312 | |
| 313 | while (ver >= 0x40 && (++domain)->name != nv_clk_src_max) { |
| 314 | struct nvbios_perfS perfS; |
| 315 | u8 sver = ver, shdr = hdr; |
| 316 | u32 perfSe = nvbios_perfSp(bios, data, domain->bios, |
| 317 | &sver, &shdr, cnt, len, &perfS); |
| 318 | if (perfSe == 0 || sver != 0x40) |
| 319 | continue; |
| 320 | |
| 321 | if (domain->flags & NVKM_CLK_DOM_FLAG_CORE) { |
| 322 | perfS.v40.freq = nouveau_clock_adjust(clk, false, |
| 323 | pstate->pstate, |
| 324 | domain->bios, |
| 325 | perfS.v40.freq); |
| 326 | } |
| 327 | |
| 328 | cstate->domain[domain->name] = perfS.v40.freq; |
| 329 | } |
| 330 | |
| 331 | data = nvbios_cstepEm(bios, pstate->pstate, &ver, &hdr, &cstepE); |
| 332 | if (data) { |
| 333 | int idx = cstepE.index; |
| 334 | do { |
| 335 | nouveau_cstate_new(clk, idx, pstate); |
| 336 | } while(idx--); |
| 337 | } |
| 338 | |
| 339 | nouveau_pstate_info(clk, pstate); |
| 340 | list_add_tail(&pstate->head, &clk->states); |
| 341 | clk->state_nr++; |
| 342 | return 0; |
| 343 | } |
| 344 | |
| 345 | /****************************************************************************** |
| 346 | * Adjustment triggers |
| 347 | *****************************************************************************/ |
| 348 | static int |
| 349 | nouveau_clock_ustate_update(struct nouveau_clock *clk, int req) |
| 350 | { |
| 351 | struct nouveau_pstate *pstate; |
| 352 | int i = 0; |
| 353 | |
| 354 | /* YKW repellant */ |
| 355 | return -ENOSYS; |
| 356 | |
| 357 | if (req != -1 && req != -2) { |
| 358 | list_for_each_entry(pstate, &clk->states, head) { |
| 359 | if (pstate->pstate == req) |
| 360 | break; |
| 361 | i++; |
| 362 | } |
| 363 | |
| 364 | if (pstate->pstate != req) |
| 365 | return -EINVAL; |
| 366 | req = i; |
| 367 | } |
| 368 | |
| 369 | clk->ustate = req; |
| 370 | return 0; |
| 371 | } |
| 372 | |
| 373 | int |
| 374 | nouveau_clock_ustate(struct nouveau_clock *clk, int req) |
| 375 | { |
| 376 | int ret = nouveau_clock_ustate_update(clk, req); |
| 377 | if (ret) |
| 378 | return ret; |
| 379 | return nouveau_pstate_calc(clk); |
| 380 | } |
| 381 | |
| 382 | int |
| 383 | nouveau_clock_astate(struct nouveau_clock *clk, int req, int rel) |
| 384 | { |
| 385 | if (!rel) clk->astate = req; |
| 386 | if ( rel) clk->astate += rel; |
| 387 | clk->astate = min(clk->astate, clk->state_nr - 1); |
| 388 | clk->astate = max(clk->astate, 0); |
| 389 | return nouveau_pstate_calc(clk); |
| 390 | } |
| 391 | |
| 392 | int |
| 393 | nouveau_clock_tstate(struct nouveau_clock *clk, int req, int rel) |
| 394 | { |
| 395 | if (!rel) clk->tstate = req; |
| 396 | if ( rel) clk->tstate += rel; |
| 397 | clk->tstate = min(clk->tstate, 0); |
| 398 | clk->tstate = max(clk->tstate, -(clk->state_nr - 1)); |
| 399 | return nouveau_pstate_calc(clk); |
| 400 | } |
| 401 | |
| 402 | int |
| 403 | nouveau_clock_dstate(struct nouveau_clock *clk, int req, int rel) |
| 404 | { |
| 405 | if (!rel) clk->dstate = req; |
| 406 | if ( rel) clk->dstate += rel; |
| 407 | clk->dstate = min(clk->dstate, clk->state_nr - 1); |
| 408 | clk->dstate = max(clk->dstate, 0); |
| 409 | return nouveau_pstate_calc(clk); |
| 410 | } |
| 411 | |
| 412 | /****************************************************************************** |
| 413 | * subdev base class implementation |
| 414 | *****************************************************************************/ |
| 415 | int |
| 416 | _nouveau_clock_init(struct nouveau_object *object) |
| 417 | { |
| 418 | struct nouveau_clock *clk = (void *)object; |
| 419 | struct nouveau_clocks *clock = clk->domains; |
| 420 | int ret; |
| 421 | |
| 422 | memset(&clk->bstate, 0x00, sizeof(clk->bstate)); |
| 423 | INIT_LIST_HEAD(&clk->bstate.list); |
| 424 | clk->bstate.pstate = 0xff; |
| 425 | |
| 426 | while (clock->name != nv_clk_src_max) { |
| 427 | ret = clk->read(clk, clock->name); |
| 428 | if (ret < 0) { |
| 429 | nv_error(clk, "%02x freq unknown\n" , clock->name); |
| 430 | return ret; |
| 431 | } |
| 432 | clk->bstate.base.domain[clock->name] = ret; |
| 433 | clock++; |
| 434 | } |
| 435 | |
| 436 | nouveau_pstate_info(clk, &clk->bstate); |
| 437 | |
| 438 | clk->astate = clk->state_nr - 1; |
| 439 | clk->tstate = 0; |
| 440 | clk->dstate = 0; |
| 441 | clk->pstate = -1; |
| 442 | nouveau_pstate_calc(clk); |
| 443 | return 0; |
| 444 | } |
| 445 | |
| 446 | void |
| 447 | _nouveau_clock_dtor(struct nouveau_object *object) |
| 448 | { |
| 449 | struct nouveau_clock *clk = (void *)object; |
| 450 | struct nouveau_pstate *pstate, *temp; |
| 451 | |
| 452 | list_for_each_entry_safe(pstate, temp, &clk->states, head) { |
| 453 | nouveau_pstate_del(pstate); |
| 454 | } |
| 455 | |
| 456 | nouveau_subdev_destroy(&clk->base); |
| 457 | } |
| 458 | |
| 459 | int |
| 460 | nouveau_clock_create_(struct nouveau_object *parent, |
| 461 | struct nouveau_object *engine, |
| 462 | struct nouveau_oclass *oclass, |
| 463 | struct nouveau_clocks *clocks, |
| 464 | int length, void **object) |
| 465 | { |
| 466 | struct nouveau_device *device = nv_device(parent); |
| 467 | struct nouveau_clock *clk; |
| 468 | int ret, idx, arglen; |
| 469 | const char *mode; |
| 470 | |
| 471 | ret = nouveau_subdev_create_(parent, engine, oclass, 0, "CLK" , |
| 472 | "clock" , length, object); |
| 473 | clk = *object; |
| 474 | if (ret) |
| 475 | return ret; |
| 476 | |
| 477 | INIT_LIST_HEAD(&clk->states); |
| 478 | clk->domains = clocks; |
| 479 | clk->ustate = -1; |
| 480 | |
| 481 | idx = 0; |
| 482 | do { |
| 483 | ret = nouveau_pstate_new(clk, idx++); |
| 484 | } while (ret == 0); |
| 485 | |
| 486 | mode = nouveau_stropt(device->cfgopt, "NvClkMode" , &arglen); |
| 487 | if (mode) { |
| 488 | if (!strncasecmpz(mode, "disabled" , arglen)) { |
| 489 | clk->ustate = -1; |
| 490 | } else { |
| 491 | char *m = kstrndup(mode, arglen, GFP_KERNEL); |
| 492 | long v; |
| 493 | |
| 494 | if (!kstrtol(m, 0, &v)) |
| 495 | nouveau_clock_ustate_update(clk, v); |
| 496 | kfree(m); |
| 497 | } |
| 498 | } |
| 499 | |
| 500 | return 0; |
| 501 | } |
| 502 | |