linux/drivers/gpu/drm/nouveau/nvkm/engine/fifo/base.c
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   1/*
   2 * Copyright 2012 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#include "chan.h"
  26
  27#include <core/client.h>
  28#include <core/gpuobj.h>
  29#include <core/notify.h>
  30#include <subdev/mc.h>
  31
  32#include <nvif/event.h>
  33#include <nvif/cl0080.h>
  34#include <nvif/unpack.h>
  35
  36void
  37nvkm_fifo_recover_chan(struct nvkm_fifo *fifo, int chid)
  38{
  39        unsigned long flags;
  40        if (WARN_ON(!fifo->func->recover_chan))
  41                return;
  42        spin_lock_irqsave(&fifo->lock, flags);
  43        fifo->func->recover_chan(fifo, chid);
  44        spin_unlock_irqrestore(&fifo->lock, flags);
  45}
  46
  47void
  48nvkm_fifo_pause(struct nvkm_fifo *fifo, unsigned long *flags)
  49{
  50        return fifo->func->pause(fifo, flags);
  51}
  52
  53void
  54nvkm_fifo_start(struct nvkm_fifo *fifo, unsigned long *flags)
  55{
  56        return fifo->func->start(fifo, flags);
  57}
  58
  59void
  60nvkm_fifo_fault(struct nvkm_fifo *fifo, struct nvkm_fault_data *info)
  61{
  62        return fifo->func->fault(fifo, info);
  63}
  64
  65void
  66nvkm_fifo_chan_put(struct nvkm_fifo *fifo, unsigned long flags,
  67                   struct nvkm_fifo_chan **pchan)
  68{
  69        struct nvkm_fifo_chan *chan = *pchan;
  70        if (likely(chan)) {
  71                *pchan = NULL;
  72                spin_unlock_irqrestore(&fifo->lock, flags);
  73        }
  74}
  75
  76struct nvkm_fifo_chan *
  77nvkm_fifo_chan_inst_locked(struct nvkm_fifo *fifo, u64 inst)
  78{
  79        struct nvkm_fifo_chan *chan;
  80        list_for_each_entry(chan, &fifo->chan, head) {
  81                if (chan->inst->addr == inst) {
  82                        list_del(&chan->head);
  83                        list_add(&chan->head, &fifo->chan);
  84                        return chan;
  85                }
  86        }
  87        return NULL;
  88}
  89
  90struct nvkm_fifo_chan *
  91nvkm_fifo_chan_inst(struct nvkm_fifo *fifo, u64 inst, unsigned long *rflags)
  92{
  93        struct nvkm_fifo_chan *chan;
  94        unsigned long flags;
  95        spin_lock_irqsave(&fifo->lock, flags);
  96        if ((chan = nvkm_fifo_chan_inst_locked(fifo, inst))) {
  97                *rflags = flags;
  98                return chan;
  99        }
 100        spin_unlock_irqrestore(&fifo->lock, flags);
 101        return NULL;
 102}
 103
 104struct nvkm_fifo_chan *
 105nvkm_fifo_chan_chid(struct nvkm_fifo *fifo, int chid, unsigned long *rflags)
 106{
 107        struct nvkm_fifo_chan *chan;
 108        unsigned long flags;
 109        spin_lock_irqsave(&fifo->lock, flags);
 110        list_for_each_entry(chan, &fifo->chan, head) {
 111                if (chan->chid == chid) {
 112                        list_del(&chan->head);
 113                        list_add(&chan->head, &fifo->chan);
 114                        *rflags = flags;
 115                        return chan;
 116                }
 117        }
 118        spin_unlock_irqrestore(&fifo->lock, flags);
 119        return NULL;
 120}
 121
 122void
 123nvkm_fifo_kevent(struct nvkm_fifo *fifo, int chid)
 124{
 125        nvkm_event_send(&fifo->kevent, 1, chid, NULL, 0);
 126}
 127
 128static int
 129nvkm_fifo_kevent_ctor(struct nvkm_object *object, void *data, u32 size,
 130                      struct nvkm_notify *notify)
 131{
 132        struct nvkm_fifo_chan *chan = nvkm_fifo_chan(object);
 133        if (size == 0) {
 134                notify->size  = 0;
 135                notify->types = 1;
 136                notify->index = chan->chid;
 137                return 0;
 138        }
 139        return -ENOSYS;
 140}
 141
 142static const struct nvkm_event_func
 143nvkm_fifo_kevent_func = {
 144        .ctor = nvkm_fifo_kevent_ctor,
 145};
 146
 147static int
 148nvkm_fifo_cevent_ctor(struct nvkm_object *object, void *data, u32 size,
 149                      struct nvkm_notify *notify)
 150{
 151        if (size == 0) {
 152                notify->size  = 0;
 153                notify->types = 1;
 154                notify->index = 0;
 155                return 0;
 156        }
 157        return -ENOSYS;
 158}
 159
 160static const struct nvkm_event_func
 161nvkm_fifo_cevent_func = {
 162        .ctor = nvkm_fifo_cevent_ctor,
 163};
 164
 165void
 166nvkm_fifo_cevent(struct nvkm_fifo *fifo)
 167{
 168        nvkm_event_send(&fifo->cevent, 1, 0, NULL, 0);
 169}
 170
 171static void
 172nvkm_fifo_uevent_fini(struct nvkm_event *event, int type, int index)
 173{
 174        struct nvkm_fifo *fifo = container_of(event, typeof(*fifo), uevent);
 175        fifo->func->uevent_fini(fifo);
 176}
 177
 178static void
 179nvkm_fifo_uevent_init(struct nvkm_event *event, int type, int index)
 180{
 181        struct nvkm_fifo *fifo = container_of(event, typeof(*fifo), uevent);
 182        fifo->func->uevent_init(fifo);
 183}
 184
 185static int
 186nvkm_fifo_uevent_ctor(struct nvkm_object *object, void *data, u32 size,
 187                      struct nvkm_notify *notify)
 188{
 189        union {
 190                struct nvif_notify_uevent_req none;
 191        } *req = data;
 192        int ret = -ENOSYS;
 193
 194        if (!(ret = nvif_unvers(ret, &data, &size, req->none))) {
 195                notify->size  = sizeof(struct nvif_notify_uevent_rep);
 196                notify->types = 1;
 197                notify->index = 0;
 198        }
 199
 200        return ret;
 201}
 202
 203static const struct nvkm_event_func
 204nvkm_fifo_uevent_func = {
 205        .ctor = nvkm_fifo_uevent_ctor,
 206        .init = nvkm_fifo_uevent_init,
 207        .fini = nvkm_fifo_uevent_fini,
 208};
 209
 210void
 211nvkm_fifo_uevent(struct nvkm_fifo *fifo)
 212{
 213        struct nvif_notify_uevent_rep rep = {
 214        };
 215        nvkm_event_send(&fifo->uevent, 1, 0, &rep, sizeof(rep));
 216}
 217
 218static int
 219nvkm_fifo_class_new_(struct nvkm_device *device,
 220                     const struct nvkm_oclass *oclass, void *data, u32 size,
 221                     struct nvkm_object **pobject)
 222{
 223        struct nvkm_fifo *fifo = nvkm_fifo(oclass->engine);
 224        return fifo->func->class_new(fifo, oclass, data, size, pobject);
 225}
 226
 227static const struct nvkm_device_oclass
 228nvkm_fifo_class_ = {
 229        .ctor = nvkm_fifo_class_new_,
 230};
 231
 232static int
 233nvkm_fifo_class_new(struct nvkm_device *device,
 234                    const struct nvkm_oclass *oclass, void *data, u32 size,
 235                    struct nvkm_object **pobject)
 236{
 237        const struct nvkm_fifo_chan_oclass *sclass = oclass->engn;
 238        struct nvkm_fifo *fifo = nvkm_fifo(oclass->engine);
 239        return sclass->ctor(fifo, oclass, data, size, pobject);
 240}
 241
 242static const struct nvkm_device_oclass
 243nvkm_fifo_class = {
 244        .ctor = nvkm_fifo_class_new,
 245};
 246
 247static int
 248nvkm_fifo_class_get(struct nvkm_oclass *oclass, int index,
 249                    const struct nvkm_device_oclass **class)
 250{
 251        struct nvkm_fifo *fifo = nvkm_fifo(oclass->engine);
 252        const struct nvkm_fifo_chan_oclass *sclass;
 253        int c = 0;
 254
 255        if (fifo->func->class_get) {
 256                int ret = fifo->func->class_get(fifo, index, oclass);
 257                if (ret == 0)
 258                        *class = &nvkm_fifo_class_;
 259                return ret;
 260        }
 261
 262        while ((sclass = fifo->func->chan[c])) {
 263                if (c++ == index) {
 264                        oclass->base = sclass->base;
 265                        oclass->engn = sclass;
 266                        *class = &nvkm_fifo_class;
 267                        return 0;
 268                }
 269        }
 270
 271        return c;
 272}
 273
 274static void
 275nvkm_fifo_intr(struct nvkm_engine *engine)
 276{
 277        struct nvkm_fifo *fifo = nvkm_fifo(engine);
 278        fifo->func->intr(fifo);
 279}
 280
 281static int
 282nvkm_fifo_fini(struct nvkm_engine *engine, bool suspend)
 283{
 284        struct nvkm_fifo *fifo = nvkm_fifo(engine);
 285        if (fifo->func->fini)
 286                fifo->func->fini(fifo);
 287        return 0;
 288}
 289
 290static int
 291nvkm_fifo_info(struct nvkm_engine *engine, u64 mthd, u64 *data)
 292{
 293        struct nvkm_fifo *fifo = nvkm_fifo(engine);
 294        switch (mthd) {
 295        case NV_DEVICE_FIFO_CHANNELS: *data = fifo->nr; return 0;
 296        default:
 297                if (fifo->func->info)
 298                        return fifo->func->info(fifo, mthd, data);
 299                break;
 300        }
 301        return -ENOSYS;
 302}
 303
 304static int
 305nvkm_fifo_oneinit(struct nvkm_engine *engine)
 306{
 307        struct nvkm_fifo *fifo = nvkm_fifo(engine);
 308        if (fifo->func->oneinit)
 309                return fifo->func->oneinit(fifo);
 310        return 0;
 311}
 312
 313static void
 314nvkm_fifo_preinit(struct nvkm_engine *engine)
 315{
 316        nvkm_mc_reset(engine->subdev.device, NVKM_ENGINE_FIFO);
 317}
 318
 319static int
 320nvkm_fifo_init(struct nvkm_engine *engine)
 321{
 322        struct nvkm_fifo *fifo = nvkm_fifo(engine);
 323        fifo->func->init(fifo);
 324        return 0;
 325}
 326
 327static void *
 328nvkm_fifo_dtor(struct nvkm_engine *engine)
 329{
 330        struct nvkm_fifo *fifo = nvkm_fifo(engine);
 331        void *data = fifo;
 332        if (fifo->func->dtor)
 333                data = fifo->func->dtor(fifo);
 334        nvkm_event_fini(&fifo->kevent);
 335        nvkm_event_fini(&fifo->cevent);
 336        nvkm_event_fini(&fifo->uevent);
 337        return data;
 338}
 339
 340static const struct nvkm_engine_func
 341nvkm_fifo = {
 342        .dtor = nvkm_fifo_dtor,
 343        .preinit = nvkm_fifo_preinit,
 344        .oneinit = nvkm_fifo_oneinit,
 345        .info = nvkm_fifo_info,
 346        .init = nvkm_fifo_init,
 347        .fini = nvkm_fifo_fini,
 348        .intr = nvkm_fifo_intr,
 349        .base.sclass = nvkm_fifo_class_get,
 350};
 351
 352int
 353nvkm_fifo_ctor(const struct nvkm_fifo_func *func, struct nvkm_device *device,
 354               int index, int nr, struct nvkm_fifo *fifo)
 355{
 356        int ret;
 357
 358        fifo->func = func;
 359        INIT_LIST_HEAD(&fifo->chan);
 360        spin_lock_init(&fifo->lock);
 361
 362        if (WARN_ON(fifo->nr > NVKM_FIFO_CHID_NR))
 363                fifo->nr = NVKM_FIFO_CHID_NR;
 364        else
 365                fifo->nr = nr;
 366        bitmap_clear(fifo->mask, 0, fifo->nr);
 367
 368        ret = nvkm_engine_ctor(&nvkm_fifo, device, index, true, &fifo->engine);
 369        if (ret)
 370                return ret;
 371
 372        if (func->uevent_init) {
 373                ret = nvkm_event_init(&nvkm_fifo_uevent_func, 1, 1,
 374                                      &fifo->uevent);
 375                if (ret)
 376                        return ret;
 377        }
 378
 379        ret = nvkm_event_init(&nvkm_fifo_cevent_func, 1, 1, &fifo->cevent);
 380        if (ret)
 381                return ret;
 382
 383        return nvkm_event_init(&nvkm_fifo_kevent_func, 1, nr, &fifo->kevent);
 384}
 385