drivers/gpu/drm/nouveau/core/engine/perfmon/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
  25 #include <core/client.h>
  26 #include <core/option.h>
  27 #include <nvif/unpack.h>
  28 #include <nvif/class.h>
  29 #include <nvif/ioctl.h>
  30
  31 #include <subdev/clock.h>
  32
  33 #include "priv.h"
  34
  35 #define QUAD_MASK 0x0f
  36 #define QUAD_FREE 0x01
  37
  38 static struct nouveau_perfsig *
  39 nouveau_perfsig_find_(struct nouveau_perfdom *dom, const char *name, u32 size)
  40 {
  41         char path[64];
  42         int i;
  43
  44         if (name[0] != '/') {
  45                 for (i = 0; i < dom->signal_nr; i++) {
  46                         if ( dom->signal[i].name &&
  47                             !strncmp(name, dom->signal[i].name, size))
  48                                 return &dom->signal[i];
  49                 }
  50         } else {
  51                 for (i = 0; i < dom->signal_nr; i++) {
  52                         snprintf(path, sizeof(path), "/%s/%02x", dom->name, i);
  53                         if (!strncmp(name, path, size))
  54                                 return &dom->signal[i];
  55                 }
  56         }
  57
  58         return NULL;
  59 }
  60
  61 struct nouveau_perfsig *
  62 nouveau_perfsig_find(struct nouveau_perfmon *ppm, const char *name, u32 size,
  63                      struct nouveau_perfdom **pdom)
  64 {
  65         struct nouveau_perfdom *dom = *pdom;
  66         struct nouveau_perfsig *sig;
  67
  68         if (dom == NULL) {
  69                 list_for_each_entry(dom, &ppm->domains, head) {
  70                         sig = nouveau_perfsig_find_(dom, name, size);
  71                         if (sig) {
  72                                 *pdom = dom;
  73                                 return sig;
  74                         }
  75                 }
  76
  77                 return NULL;
  78         }
  79
  80         return nouveau_perfsig_find_(dom, name, size);
  81 }
  82
  83 struct nouveau_perfctr *
  84 nouveau_perfsig_wrap(struct nouveau_perfmon *ppm, const char *name,
  85                      struct nouveau_perfdom **pdom)
  86 {
  87         struct nouveau_perfsig *sig;
  88         struct nouveau_perfctr *ctr;
  89
  90         sig = nouveau_perfsig_find(ppm, name, strlen(name), pdom);
  91         if (!sig)
  92                 return NULL;
  93
  94         ctr = kzalloc(sizeof(*ctr), GFP_KERNEL);
  95         if (ctr) {
  96                 ctr->signal[0] = sig;
  97                 ctr->logic_op = 0xaaaa;
  98         }
  99
 100         return ctr;
 101 }
 102
 103 /*******************************************************************************
 104  * Perfmon object classes
 105  ******************************************************************************/
 106 static int
 107 nouveau_perfctr_query(struct nouveau_object *object, void *data, u32 size)
 108 {
 109         union {
 110                 struct nvif_perfctr_query_v0 v0;
 111         } *args = data;
 112         struct nouveau_device *device = nv_device(object);
 113         struct nouveau_perfmon *ppm = (void *)object->engine;
 114         struct nouveau_perfdom *dom = NULL, *chk;
 115         const bool all = nouveau_boolopt(device->cfgopt, "NvPmShowAll", false);
 116         const bool raw = nouveau_boolopt(device->cfgopt, "NvPmUnnamed", all);
 117         const char *name;
 118         int tmp = 0, di, si;
 119         int ret;
 120
 121         nv_ioctl(object, "perfctr query size %d\n", size);
 122         if (nvif_unpack(args->v0, 0, 0, false)) {
 123                 nv_ioctl(object, "perfctr query vers %d iter %08x\n",
 124                          args->v0.version, args->v0.iter);
 125                 di = (args->v0.iter & 0xff000000) >> 24;
 126                 si = (args->v0.iter & 0x00ffffff) - 1;
 127         } else
 128                 return ret;
 129
 130         list_for_each_entry(chk, &ppm->domains, head) {
 131                 if (tmp++ == di) {
 132                         dom = chk;
 133                         break;
 134                 }
 135         }
 136
 137         if (dom == NULL || si >= (int)dom->signal_nr)
 138                 return -EINVAL;
 139
 140         if (si >= 0) {
 141                 if (raw || !(name = dom->signal[si].name)) {
 142                         snprintf(args->v0.name, sizeof(args->v0.name),
 143                                  "/%s/%02x", dom->name, si);
 144                 } else {
 145                         strncpy(args->v0.name, name, sizeof(args->v0.name));
 146                 }
 147         }
 148
 149         do {
 150                 while (++si < dom->signal_nr) {
 151                         if (all || dom->signal[si].name) {
 152                                 args->v0.iter = (di << 24) | ++si;
 153                                 return 0;
 154                         }
 155                 }
 156                 si = -1;
 157                 di = di + 1;
 158                 dom = list_entry(dom->head.next, typeof(*dom), head);
 159         } while (&dom->head != &ppm->domains);
 160
 161         args->v0.iter = 0xffffffff;
 162         return 0;
 163 }
 164
 165 static int
 166 nouveau_perfctr_sample(struct nouveau_object *object, void *data, u32 size)
 167 {
 168         union {
 169                 struct nvif_perfctr_sample none;
 170         } *args = data;
 171         struct nouveau_perfmon *ppm = (void *)object->engine;
 172         struct nouveau_perfctr *ctr, *tmp;
 173         struct nouveau_perfdom *dom;
 174         int ret;
 175
 176         nv_ioctl(object, "perfctr sample size %d\n", size);
 177         if (nvif_unvers(args->none)) {
 178                 nv_ioctl(object, "perfctr sample\n");
 179         } else
 180                 return ret;
 181         ppm->sequence++;
 182
 183         list_for_each_entry(dom, &ppm->domains, head) {
 184                 /* sample previous batch of counters */
 185                 if (dom->quad != QUAD_MASK) {
 186                         dom->func->next(ppm, dom);
 187                         tmp = NULL;
 188                         while (!list_empty(&dom->list)) {
 189                                 ctr = list_first_entry(&dom->list,
 190                                                         typeof(*ctr), head);
 191                                 if (ctr->slot < 0) break;
 192                                 if ( tmp && tmp == ctr) break;
 193                                 if (!tmp) tmp = ctr;
 194                                 dom->func->read(ppm, dom, ctr);
 195                                 ctr->slot  = -1;
 196                                 list_move_tail(&ctr->head, &dom->list);
 197                         }
 198                 }
 199
 200                 dom->quad = QUAD_MASK;
 201
 202                 /* setup next batch of counters for sampling */
 203                 list_for_each_entry(ctr, &dom->list, head) {
 204                         ctr->slot = ffs(dom->quad) - 1;
 205                         if (ctr->slot < 0)
 206                                 break;
 207                         dom->quad &= ~(QUAD_FREE << ctr->slot);
 208                         dom->func->init(ppm, dom, ctr);
 209                 }
 210
 211                 if (dom->quad != QUAD_MASK)
 212                         dom->func->next(ppm, dom);
 213         }
 214
 215         return 0;
 216 }
 217
 218 static int
 219 nouveau_perfctr_read(struct nouveau_object *object, void *data, u32 size)
 220 {
 221         union {
 222                 struct nvif_perfctr_read_v0 v0;
 223         } *args = data;
 224         struct nouveau_perfctr *ctr = (void *)object;
 225         int ret;
 226
 227         nv_ioctl(object, "perfctr read size %d\n", size);
 228         if (nvif_unpack(args->v0, 0, 0, false)) {
 229                 nv_ioctl(object, "perfctr read vers %d\n", args->v0.version);
 230         } else
 231                 return ret;
 232
 233         if (!ctr->clk)
 234                 return -EAGAIN;
 235
 236         args->v0.clk = ctr->clk;
 237         args->v0.ctr = ctr->ctr;
 238         return 0;
 239 }
 240
 241 static int
 242 nouveau_perfctr_mthd(struct nouveau_object *object, u32 mthd,
 243                      void *data, u32 size)
 244 {
 245         switch (mthd) {
 246         case NVIF_PERFCTR_V0_QUERY:
 247                 return nouveau_perfctr_query(object, data, size);
 248         case NVIF_PERFCTR_V0_SAMPLE:
 249                 return nouveau_perfctr_sample(object, data, size);
 250         case NVIF_PERFCTR_V0_READ:
 251                 return nouveau_perfctr_read(object, data, size);
 252         default:
 253                 break;
 254         }
 255         return -EINVAL;
 256 }
 257
 258 static void
 259 nouveau_perfctr_dtor(struct nouveau_object *object)
 260 {
 261         struct nouveau_perfctr *ctr = (void *)object;
 262         if (ctr->head.next)
 263                 list_del(&ctr->head);
 264         nouveau_object_destroy(&ctr->base);
 265 }
 266
 267 static int
 268 nouveau_perfctr_ctor(struct nouveau_object *parent,
 269                      struct nouveau_object *engine,
 270                      struct nouveau_oclass *oclass, void *data, u32 size,
 271                      struct nouveau_object **pobject)
 272 {
 273         union {
 274                 struct nvif_perfctr_v0 v0;
 275         } *args = data;
 276         struct nouveau_perfmon *ppm = (void *)engine;
 277         struct nouveau_perfdom *dom = NULL;
 278         struct nouveau_perfsig *sig[4] = {};
 279         struct nouveau_perfctr *ctr;
 280         int ret, i;
 281
 282         nv_ioctl(parent, "create perfctr size %d\n", size);
 283         if (nvif_unpack(args->v0, 0, 0, false)) {
 284                 nv_ioctl(parent, "create perfctr vers %d logic_op %04x\n",
 285                          args->v0.version, args->v0.logic_op);
 286         } else
 287                 return ret;
 288
 289         for (i = 0; i < ARRAY_SIZE(args->v0.name) && args->v0.name[i][0]; i++) {
 290                 sig[i] = nouveau_perfsig_find(ppm, args->v0.name[i],
 291                                               strnlen(args->v0.name[i],
 292                                               sizeof(args->v0.name[i])),
 293                                               &dom);
 294                 if (!sig[i])
 295                         return -EINVAL;
 296         }
 297
 298         ret = nouveau_object_create(parent, engine, oclass, 0, &ctr);
 299         *pobject = nv_object(ctr);
 300         if (ret)
 301                 return ret;
 302
 303         ctr->slot = -1;
 304         ctr->logic_op = args->v0.logic_op;
 305         ctr->signal[0] = sig[0];
 306         ctr->signal[1] = sig[1];
 307         ctr->signal[2] = sig[2];
 308         ctr->signal[3] = sig[3];
 309         if (dom)
 310                 list_add_tail(&ctr->head, &dom->list);
 311         return 0;
 312 }
 313
 314 static struct nouveau_ofuncs
 315 nouveau_perfctr_ofuncs = {
 316         .ctor = nouveau_perfctr_ctor,
 317         .dtor = nouveau_perfctr_dtor,
 318         .init = nouveau_object_init,
 319         .fini = nouveau_object_fini,
 320         .mthd = nouveau_perfctr_mthd,
 321 };
 322
 323 struct nouveau_oclass
 324 nouveau_perfmon_sclass[] = {
 325         { .handle = NVIF_IOCTL_NEW_V0_PERFCTR,
 326           .ofuncs = &nouveau_perfctr_ofuncs,
 327         },
 328         {},
 329 };
 330
 331 /*******************************************************************************
 332  * PPM context
 333  ******************************************************************************/
 334 static void
 335 nouveau_perfctx_dtor(struct nouveau_object *object)
 336 {
 337         struct nouveau_perfmon *ppm = (void *)object->engine;
 338         mutex_lock(&nv_subdev(ppm)->mutex);
 339         nouveau_engctx_destroy(&ppm->context->base);
 340         ppm->context = NULL;
 341         mutex_unlock(&nv_subdev(ppm)->mutex);
 342 }
 343
 344 static int
 345 nouveau_perfctx_ctor(struct nouveau_object *parent,
 346                      struct nouveau_object *engine,
 347                      struct nouveau_oclass *oclass, void *data, u32 size,
 348                      struct nouveau_object **pobject)
 349 {
 350         struct nouveau_perfmon *ppm = (void *)engine;
 351         struct nouveau_perfctx *ctx;
 352         int ret;
 353
 354         ret = nouveau_engctx_create(parent, engine, oclass, NULL,
 355                                     0, 0, 0, &ctx);
 356         *pobject = nv_object(ctx);
 357         if (ret)
 358                 return ret;
 359
 360         mutex_lock(&nv_subdev(ppm)->mutex);
 361         if (ppm->context == NULL)
 362                 ppm->context = ctx;
 363         mutex_unlock(&nv_subdev(ppm)->mutex);
 364
 365         if (ctx != ppm->context)
 366                 return -EBUSY;
 367
 368         return 0;
 369 }
 370
 371 struct nouveau_oclass
 372 nouveau_perfmon_cclass = {
 373         .handle = NV_ENGCTX(PERFMON, 0x00),
 374         .ofuncs = &(struct nouveau_ofuncs) {
 375                 .ctor = nouveau_perfctx_ctor,
 376                 .dtor = nouveau_perfctx_dtor,
 377                 .init = _nouveau_engctx_init,
 378                 .fini = _nouveau_engctx_fini,
 379         },
 380 };
 381
 382 /*******************************************************************************
 383  * PPM engine/subdev functions
 384  ******************************************************************************/
 385 int
 386 nouveau_perfdom_new(struct nouveau_perfmon *ppm, const char *name, u32 mask,
 387                     u32 base, u32 size_unit, u32 size_domain,
 388                     const struct nouveau_specdom *spec)
 389 {
 390         const struct nouveau_specdom *sdom;
 391         const struct nouveau_specsig *ssig;
 392         struct nouveau_perfdom *dom;
 393         int i;
 394
 395         for (i = 0; i == 0 || mask; i++) {
 396                 u32 addr = base + (i * size_unit);
 397                 if (i && !(mask & (1 << i)))
 398                         continue;
 399
 400                 sdom = spec;
 401                 while (sdom->signal_nr) {
 402                         dom = kzalloc(sizeof(*dom) + sdom->signal_nr *
 403                                       sizeof(*dom->signal), GFP_KERNEL);
 404                         if (!dom)
 405                                 return -ENOMEM;
 406
 407                         if (mask) {
 408                                 snprintf(dom->name, sizeof(dom->name),
 409                                          "%s/%02x/%02x", name, i,
 410                                          (int)(sdom - spec));
 411                         } else {
 412                                 snprintf(dom->name, sizeof(dom->name),
 413                                          "%s/%02x", name, (int)(sdom - spec));
 414                         }
 415
 416                         list_add_tail(&dom->head, &ppm->domains);
 417                         INIT_LIST_HEAD(&dom->list);
 418                         dom->func = sdom->func;
 419                         dom->addr = addr;
 420                         dom->quad = QUAD_MASK;
 421                         dom->signal_nr = sdom->signal_nr;
 422
 423                         ssig = (sdom++)->signal;
 424                         while (ssig->name) {
 425                                 dom->signal[ssig->signal].name = ssig->name;
 426                                 ssig++;
 427                         }
 428
 429                         addr += size_domain;
 430                 }
 431
 432                 mask &= ~(1 << i);
 433         }
 434
 435         return 0;
 436 }
 437
 438 int
 439 _nouveau_perfmon_fini(struct nouveau_object *object, bool suspend)
 440 {
 441         struct nouveau_perfmon *ppm = (void *)object;
 442         return nouveau_engine_fini(&ppm->base, suspend);
 443 }
 444
 445 int
 446 _nouveau_perfmon_init(struct nouveau_object *object)
 447 {
 448         struct nouveau_perfmon *ppm = (void *)object;
 449         return nouveau_engine_init(&ppm->base);
 450 }
 451
 452 void
 453 _nouveau_perfmon_dtor(struct nouveau_object *object)
 454 {
 455         struct nouveau_perfmon *ppm = (void *)object;
 456         struct nouveau_perfdom *dom, *tmp;
 457
 458         list_for_each_entry_safe(dom, tmp, &ppm->domains, head) {
 459                 list_del(&dom->head);
 460                 kfree(dom);
 461         }
 462
 463         nouveau_engine_destroy(&ppm->base);
 464 }
 465
 466 int
 467 nouveau_perfmon_create_(struct nouveau_object *parent,
 468                         struct nouveau_object *engine,
 469                         struct nouveau_oclass *oclass,
 470                         int length, void **pobject)
 471 {
 472         struct nouveau_perfmon *ppm;
 473         int ret;
 474
 475         ret = nouveau_engine_create_(parent, engine, oclass, true, "PPM",
 476                                      "perfmon", length, pobject);
 477         ppm = *pobject;
 478         if (ret)
 479                 return ret;
 480
 481         INIT_LIST_HEAD(&ppm->domains);
 482         return 0;
 483 }