kernel/drivers/gpu/drm/nouveau/nvkm/engine/pm/base.c

   1 /*
   2  * Copyright 2013 Red Hat Inc.
   3  *
   4  * Permission is hereby granted, free of charge, to any person obtaining a
   5  * copy of this software and associated documentation files (the "Software"),
   6  * to deal in the Software without restriction, including without limitation
   7  * the rights to use, copy, modify, merge, publish, distribute, sublicense,
   8  * and/or sell copies of the Software, and to permit persons to whom the
   9  * Software is furnished to do so, subject to the following conditions:
  10  *
  11  * The above copyright notice and this permission notice shall be included in
  12  * all copies or substantial portions of the Software.
  13  *
  14  * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
  15  * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
  16  * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.  IN NO EVENT SHALL
  17  * THE COPYRIGHT HOLDER(S) OR AUTHOR(S) BE LIABLE FOR ANY CLAIM, DAMAGES OR
  18  * OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE,
  19  * ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR
  20  * OTHER DEALINGS IN THE SOFTWARE.
  21  *
  22  * Authors: Ben Skeggs
  23  */
  24 #include "priv.h"
  25
  26 #include <core/client.h>
  27 #include <core/device.h>
  28 #include <core/option.h>
  29
  30 #include <nvif/class.h>
  31 #include <nvif/ioctl.h>
  32 #include <nvif/unpack.h>
  33
  34 #define QUAD_MASK 0x0f
  35 #define QUAD_FREE 0x01
  36
  37 static struct nvkm_perfsig *
  38 nvkm_perfsig_find_(struct nvkm_perfdom *dom, const char *name, u32 size)
  39 {
  40         char path[64];
  41         int i;
  42
  43         if (name[0] != '/') {
  44                 for (i = 0; i < dom->signal_nr; i++) {
  45                         if ( dom->signal[i].name &&
  46                             !strncmp(name, dom->signal[i].name, size))
  47                                 return &dom->signal[i];
  48                 }
  49         } else {
  50                 for (i = 0; i < dom->signal_nr; i++) {
  51                         snprintf(path, sizeof(path), "/%s/%02x", dom->name, i);
  52                         if (!strncmp(name, path, size))
  53                                 return &dom->signal[i];
  54                 }
  55         }
  56
  57         return NULL;
  58 }
  59
  60 struct nvkm_perfsig *
  61 nvkm_perfsig_find(struct nvkm_pm *ppm, const char *name, u32 size,
  62                   struct nvkm_perfdom **pdom)
  63 {
  64         struct nvkm_perfdom *dom = *pdom;
  65         struct nvkm_perfsig *sig;
  66
  67         if (dom == NULL) {
  68                 list_for_each_entry(dom, &ppm->domains, head) {
  69                         sig = nvkm_perfsig_find_(dom, name, size);
  70                         if (sig) {
  71                                 *pdom = dom;
  72                                 return sig;
  73                         }
  74                 }
  75
  76                 return NULL;
  77         }
  78
  79         return nvkm_perfsig_find_(dom, name, size);
  80 }
  81
  82 struct nvkm_perfctr *
  83 nvkm_perfsig_wrap(struct nvkm_pm *ppm, const char *name,
  84                   struct nvkm_perfdom **pdom)
  85 {
  86         struct nvkm_perfsig *sig;
  87         struct nvkm_perfctr *ctr;
  88
  89         sig = nvkm_perfsig_find(ppm, name, strlen(name), pdom);
  90         if (!sig)
  91                 return NULL;
  92
  93         ctr = kzalloc(sizeof(*ctr), GFP_KERNEL);
  94         if (ctr) {
  95                 ctr->signal[0] = sig;
  96                 ctr->logic_op = 0xaaaa;
  97         }
  98
  99         return ctr;
 100 }
 101
 102 /*******************************************************************************
 103  * Perfmon object classes
 104  ******************************************************************************/
 105 static int
 106 nvkm_perfctr_query(struct nvkm_object *object, void *data, u32 size)
 107 {
 108         union {
 109                 struct nvif_perfctr_query_v0 v0;
 110         } *args = data;
 111         struct nvkm_device *device = nv_device(object);
 112         struct nvkm_pm *ppm = (void *)object->engine;
 113         struct nvkm_perfdom *dom = NULL, *chk;
 114         const bool all = nvkm_boolopt(device->cfgopt, "NvPmShowAll", false);
 115         const bool raw = nvkm_boolopt(device->cfgopt, "NvPmUnnamed", all);
 116         const char *name;
 117         int tmp = 0, di, si;
 118         int ret;
 119
 120         nv_ioctl(object, "perfctr query size %d\n", size);
 121         if (nvif_unpack(args->v0, 0, 0, false)) {
 122                 nv_ioctl(object, "perfctr query vers %d iter %08x\n",
 123                          args->v0.version, args->v0.iter);
 124                 di = (args->v0.iter & 0xff000000) >> 24;
 125                 si = (args->v0.iter & 0x00ffffff) - 1;
 126         } else
 127                 return ret;
 128
 129         list_for_each_entry(chk, &ppm->domains, head) {
 130                 if (tmp++ == di) {
 131                         dom = chk;
 132                         break;
 133                 }
 134         }
 135
 136         if (dom == NULL || si >= (int)dom->signal_nr)
 137                 return -EINVAL;
 138
 139         if (si >= 0) {
 140                 if (raw || !(name = dom->signal[si].name)) {
 141                         snprintf(args->v0.name, sizeof(args->v0.name),
 142                                  "/%s/%02x", dom->name, si);
 143                 } else {
 144                         strncpy(args->v0.name, name, sizeof(args->v0.name));
 145                 }
 146         }
 147
 148         do {
 149                 while (++si < dom->signal_nr) {
 150                         if (all || dom->signal[si].name) {
 151                                 args->v0.iter = (di << 24) | ++si;
 152                                 return 0;
 153                         }
 154                 }
 155                 si = -1;
 156                 di = di + 1;
 157                 dom = list_entry(dom->head.next, typeof(*dom), head);
 158         } while (&dom->head != &ppm->domains);
 159
 160         args->v0.iter = 0xffffffff;
 161         return 0;
 162 }
 163
 164 static int
 165 nvkm_perfctr_sample(struct nvkm_object *object, void *data, u32 size)
 166 {
 167         union {
 168                 struct nvif_perfctr_sample none;
 169         } *args = data;
 170         struct nvkm_pm *ppm = (void *)object->engine;
 171         struct nvkm_perfctr *ctr, *tmp;
 172         struct nvkm_perfdom *dom;
 173         int ret;
 174
 175         nv_ioctl(object, "perfctr sample size %d\n", size);
 176         if (nvif_unvers(args->none)) {
 177                 nv_ioctl(object, "perfctr sample\n");
 178         } else
 179                 return ret;
 180         ppm->sequence++;
 181
 182         list_for_each_entry(dom, &ppm->domains, head) {
 183                 /* sample previous batch of counters */
 184                 if (dom->quad != QUAD_MASK) {
 185                         dom->func->next(ppm, dom);
 186                         tmp = NULL;
 187                         while (!list_empty(&dom->list)) {
 188                                 ctr = list_first_entry(&dom->list,
 189                                                        typeof(*ctr), head);
 190                                 if (ctr->slot < 0) break;
 191                                 if ( tmp && tmp == ctr) break;
 192                                 if (!tmp) tmp = ctr;
 193                                 dom->func->read(ppm, dom, ctr);
 194                                 ctr->slot  = -1;
 195                                 list_move_tail(&ctr->head, &dom->list);
 196                         }
 197                 }
 198
 199                 dom->quad = QUAD_MASK;
 200
 201                 /* setup next batch of counters for sampling */
 202                 list_for_each_entry(ctr, &dom->list, head) {
 203                         ctr->slot = ffs(dom->quad) - 1;
 204                         if (ctr->slot < 0)
 205                                 break;
 206                         dom->quad &= ~(QUAD_FREE << ctr->slot);
 207                         dom->func->init(ppm, dom, ctr);
 208                 }
 209
 210                 if (dom->quad != QUAD_MASK)
 211                         dom->func->next(ppm, dom);
 212         }
 213
 214         return 0;
 215 }
 216
 217 static int
 218 nvkm_perfctr_read(struct nvkm_object *object, void *data, u32 size)
 219 {
 220         union {
 221                 struct nvif_perfctr_read_v0 v0;
 222         } *args = data;
 223         struct nvkm_perfctr *ctr = (void *)object;
 224         int ret;
 225
 226         nv_ioctl(object, "perfctr read size %d\n", size);
 227         if (nvif_unpack(args->v0, 0, 0, false)) {
 228                 nv_ioctl(object, "perfctr read vers %d\n", args->v0.version);
 229         } else
 230                 return ret;
 231
 232         if (!ctr->clk)
 233                 return -EAGAIN;
 234
 235         args->v0.clk = ctr->clk;
 236         args->v0.ctr = ctr->ctr;
 237         return 0;
 238 }
 239
 240 static int
 241 nvkm_perfctr_mthd(struct nvkm_object *object, u32 mthd, void *data, u32 size)
 242 {
 243         switch (mthd) {
 244         case NVIF_PERFCTR_V0_QUERY:
 245                 return nvkm_perfctr_query(object, data, size);
 246         case NVIF_PERFCTR_V0_SAMPLE:
 247                 return nvkm_perfctr_sample(object, data, size);
 248         case NVIF_PERFCTR_V0_READ:
 249                 return nvkm_perfctr_read(object, data, size);
 250         default:
 251                 break;
 252         }
 253         return -EINVAL;
 254 }
 255
 256 static void
 257 nvkm_perfctr_dtor(struct nvkm_object *object)
 258 {
 259         struct nvkm_perfctr *ctr = (void *)object;
 260         if (ctr->head.next)
 261                 list_del(&ctr->head);
 262         nvkm_object_destroy(&ctr->base);
 263 }
 264
 265 static int
 266 nvkm_perfctr_ctor(struct nvkm_object *parent, struct nvkm_object *engine,
 267                   struct nvkm_oclass *oclass, void *data, u32 size,
 268                   struct nvkm_object **pobject)
 269 {
 270         union {
 271                 struct nvif_perfctr_v0 v0;
 272         } *args = data;
 273         struct nvkm_pm *ppm = (void *)engine;
 274         struct nvkm_perfdom *dom = NULL;
 275         struct nvkm_perfsig *sig[4] = {};
 276         struct nvkm_perfctr *ctr;
 277         int ret, i;
 278
 279         nv_ioctl(parent, "create perfctr size %d\n", size);
 280         if (nvif_unpack(args->v0, 0, 0, false)) {
 281                 nv_ioctl(parent, "create perfctr vers %d logic_op %04x\n",
 282                          args->v0.version, args->v0.logic_op);
 283         } else
 284                 return ret;
 285
 286         for (i = 0; i < ARRAY_SIZE(args->v0.name) && args->v0.name[i][0]; i++) {
 287                 sig[i] = nvkm_perfsig_find(ppm, args->v0.name[i],
 288                                            strnlen(args->v0.name[i],
 289                                                    sizeof(args->v0.name[i])),
 290                                            &dom);
 291                 if (!sig[i])
 292                         return -EINVAL;
 293         }
 294
 295         ret = nvkm_object_create(parent, engine, oclass, 0, &ctr);
 296         *pobject = nv_object(ctr);
 297         if (ret)
 298                 return ret;
 299
 300         ctr->slot = -1;
 301         ctr->logic_op = args->v0.logic_op;
 302         ctr->signal[0] = sig[0];
 303         ctr->signal[1] = sig[1];
 304         ctr->signal[2] = sig[2];
 305         ctr->signal[3] = sig[3];
 306         if (dom)
 307                 list_add_tail(&ctr->head, &dom->list);
 308         return 0;
 309 }
 310
 311 static struct nvkm_ofuncs
 312 nvkm_perfctr_ofuncs = {
 313         .ctor = nvkm_perfctr_ctor,
 314         .dtor = nvkm_perfctr_dtor,
 315         .init = nvkm_object_init,
 316         .fini = nvkm_object_fini,
 317         .mthd = nvkm_perfctr_mthd,
 318 };
 319
 320 struct nvkm_oclass
 321 nvkm_pm_sclass[] = {
 322         { .handle = NVIF_IOCTL_NEW_V0_PERFCTR,
 323           .ofuncs = &nvkm_perfctr_ofuncs,
 324         },
 325         {},
 326 };
 327
 328 /*******************************************************************************
 329  * PPM context
 330  ******************************************************************************/
 331 static void
 332 nvkm_perfctx_dtor(struct nvkm_object *object)
 333 {
 334         struct nvkm_pm *ppm = (void *)object->engine;
 335         mutex_lock(&nv_subdev(ppm)->mutex);
 336         nvkm_engctx_destroy(&ppm->context->base);
 337         ppm->context = NULL;
 338         mutex_unlock(&nv_subdev(ppm)->mutex);
 339 }
 340
 341 static int
 342 nvkm_perfctx_ctor(struct nvkm_object *parent, struct nvkm_object *engine,
 343                   struct nvkm_oclass *oclass, void *data, u32 size,
 344                   struct nvkm_object **pobject)
 345 {
 346         struct nvkm_pm *ppm = (void *)engine;
 347         struct nvkm_perfctx *ctx;
 348         int ret;
 349
 350         ret = nvkm_engctx_create(parent, engine, oclass, NULL, 0, 0, 0, &ctx);
 351         *pobject = nv_object(ctx);
 352         if (ret)
 353                 return ret;
 354
 355         mutex_lock(&nv_subdev(ppm)->mutex);
 356         if (ppm->context == NULL)
 357                 ppm->context = ctx;
 358         mutex_unlock(&nv_subdev(ppm)->mutex);
 359
 360         if (ctx != ppm->context)
 361                 return -EBUSY;
 362
 363         return 0;
 364 }
 365
 366 struct nvkm_oclass
 367 nvkm_pm_cclass = {
 368         .handle = NV_ENGCTX(PM, 0x00),
 369         .ofuncs = &(struct nvkm_ofuncs) {
 370                 .ctor = nvkm_perfctx_ctor,
 371                 .dtor = nvkm_perfctx_dtor,
 372                 .init = _nvkm_engctx_init,
 373                 .fini = _nvkm_engctx_fini,
 374         },
 375 };
 376
 377 /*******************************************************************************
 378  * PPM engine/subdev functions
 379  ******************************************************************************/
 380 int
 381 nvkm_perfdom_new(struct nvkm_pm *ppm, const char *name, u32 mask,
 382                  u32 base, u32 size_unit, u32 size_domain,
 383                  const struct nvkm_specdom *spec)
 384 {
 385         const struct nvkm_specdom *sdom;
 386         const struct nvkm_specsig *ssig;
 387         struct nvkm_perfdom *dom;
 388         int i;
 389
 390         for (i = 0; i == 0 || mask; i++) {
 391                 u32 addr = base + (i * size_unit);
 392                 if (i && !(mask & (1 << i)))
 393                         continue;
 394
 395                 sdom = spec;
 396                 while (sdom->signal_nr) {
 397                         dom = kzalloc(sizeof(*dom) + sdom->signal_nr *
 398                                       sizeof(*dom->signal), GFP_KERNEL);
 399                         if (!dom)
 400                                 return -ENOMEM;
 401
 402                         if (mask) {
 403                                 snprintf(dom->name, sizeof(dom->name),
 404                                          "%s/%02x/%02x", name, i,
 405                                          (int)(sdom - spec));
 406                         } else {
 407                                 snprintf(dom->name, sizeof(dom->name),
 408                                          "%s/%02x", name, (int)(sdom - spec));
 409                         }
 410
 411                         list_add_tail(&dom->head, &ppm->domains);
 412                         INIT_LIST_HEAD(&dom->list);
 413                         dom->func = sdom->func;
 414                         dom->addr = addr;
 415                         dom->quad = QUAD_MASK;
 416                         dom->signal_nr = sdom->signal_nr;
 417
 418                         ssig = (sdom++)->signal;
 419                         while (ssig->name) {
 420                                 dom->signal[ssig->signal].name = ssig->name;
 421                                 ssig++;
 422                         }
 423
 424                         addr += size_domain;
 425                 }
 426
 427                 mask &= ~(1 << i);
 428         }
 429
 430         return 0;
 431 }
 432
 433 int
 434 _nvkm_pm_fini(struct nvkm_object *object, bool suspend)
 435 {
 436         struct nvkm_pm *ppm = (void *)object;
 437         return nvkm_engine_fini(&ppm->base, suspend);
 438 }
 439
 440 int
 441 _nvkm_pm_init(struct nvkm_object *object)
 442 {
 443         struct nvkm_pm *ppm = (void *)object;
 444         return nvkm_engine_init(&ppm->base);
 445 }
 446
 447 void
 448 _nvkm_pm_dtor(struct nvkm_object *object)
 449 {
 450         struct nvkm_pm *ppm = (void *)object;
 451         struct nvkm_perfdom *dom, *tmp;
 452
 453         list_for_each_entry_safe(dom, tmp, &ppm->domains, head) {
 454                 list_del(&dom->head);
 455                 kfree(dom);
 456         }
 457
 458         nvkm_engine_destroy(&ppm->base);
 459 }
 460
 461 int
 462 nvkm_pm_create_(struct nvkm_object *parent, struct nvkm_object *engine,
 463                 struct nvkm_oclass *oclass, int length, void **pobject)
 464 {
 465         struct nvkm_pm *ppm;
 466         int ret;
 467
 468         ret = nvkm_engine_create_(parent, engine, oclass, true, "PPM",
 469                                   "pm", length, pobject);
 470         ppm = *pobject;
 471         if (ret)
 472                 return ret;
 473
 474         INIT_LIST_HEAD(&ppm->domains);
 475         return 0;
 476 }