drivers/gpu/drm/nouveau/nvkm/engine/fifo/nv04.c

   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 "nv04.h"
  25 #include "channv04.h"
  26 #include "regsnv04.h"
  27
  28 #include <core/client.h>
  29 #include <core/ramht.h>
  30 #include <subdev/instmem.h>
  31 #include <subdev/timer.h>
  32 #include <engine/sw.h>
  33
  34 static const struct nv04_fifo_ramfc
  35 nv04_fifo_ramfc[] = {
  36         { 32,  0, 0x00,  0, NV04_PFIFO_CACHE1_DMA_PUT },
  37         { 32,  0, 0x04,  0, NV04_PFIFO_CACHE1_DMA_GET },
  38         { 16,  0, 0x08,  0, NV04_PFIFO_CACHE1_DMA_INSTANCE },
  39         { 16, 16, 0x08,  0, NV04_PFIFO_CACHE1_DMA_DCOUNT },
  40         { 32,  0, 0x0c,  0, NV04_PFIFO_CACHE1_DMA_STATE },
  41         { 32,  0, 0x10,  0, NV04_PFIFO_CACHE1_DMA_FETCH },
  42         { 32,  0, 0x14,  0, NV04_PFIFO_CACHE1_ENGINE },
  43         { 32,  0, 0x18,  0, NV04_PFIFO_CACHE1_PULL1 },
  44         {}
  45 };
  46
  47 void
  48 nv04_fifo_pause(struct nvkm_fifo *base, unsigned long *pflags)
  49 __acquires(fifo->base.lock)
  50 {
  51         struct nv04_fifo *fifo = nv04_fifo(base);
  52         struct nvkm_device *device = fifo->base.engine.subdev.device;
  53         unsigned long flags;
  54
  55         spin_lock_irqsave(&fifo->base.lock, flags);
  56         *pflags = flags;
  57
  58         nvkm_wr32(device, NV03_PFIFO_CACHES, 0x00000000);
  59         nvkm_mask(device, NV04_PFIFO_CACHE1_PULL0, 0x00000001, 0x00000000);
  60
  61         /* in some cases the puller may be left in an inconsistent state
  62          * if you try to stop it while it's busy translating handles.
  63          * sometimes you get a CACHE_ERROR, sometimes it just fails
  64          * silently; sending incorrect instance offsets to PGRAPH after
  65          * it's started up again.
  66          *
  67          * to avoid this, we invalidate the most recently calculated
  68          * instance.
  69          */
  70         nvkm_msec(device, 2000,
  71                 u32 tmp = nvkm_rd32(device, NV04_PFIFO_CACHE1_PULL0);
  72                 if (!(tmp & NV04_PFIFO_CACHE1_PULL0_HASH_BUSY))
  73                         break;
  74         );
  75
  76         if (nvkm_rd32(device, NV04_PFIFO_CACHE1_PULL0) &
  77                           NV04_PFIFO_CACHE1_PULL0_HASH_FAILED)
  78                 nvkm_wr32(device, NV03_PFIFO_INTR_0, NV_PFIFO_INTR_CACHE_ERROR);
  79
  80         nvkm_wr32(device, NV04_PFIFO_CACHE1_HASH, 0x00000000);
  81 }
  82
  83 void
  84 nv04_fifo_start(struct nvkm_fifo *base, unsigned long *pflags)
  85 __releases(fifo->base.lock)
  86 {
  87         struct nv04_fifo *fifo = nv04_fifo(base);
  88         struct nvkm_device *device = fifo->base.engine.subdev.device;
  89         unsigned long flags = *pflags;
  90
  91         nvkm_mask(device, NV04_PFIFO_CACHE1_PULL0, 0x00000001, 0x00000001);
  92         nvkm_wr32(device, NV03_PFIFO_CACHES, 0x00000001);
  93
  94         spin_unlock_irqrestore(&fifo->base.lock, flags);
  95 }
  96
  97 static const char *
  98 nv_dma_state_err(u32 state)
  99 {
 100         static const char * const desc[] = {
 101                 "NONE", "CALL_SUBR_ACTIVE", "INVALID_MTHD", "RET_SUBR_INACTIVE",
 102                 "INVALID_CMD", "IB_EMPTY"/* NV50+ */, "MEM_FAULT", "UNK"
 103         };
 104         return desc[(state >> 29) & 0x7];
 105 }
 106
 107 static bool
 108 nv04_fifo_swmthd(struct nvkm_device *device, u32 chid, u32 addr, u32 data)
 109 {
 110         struct nvkm_sw *sw = device->sw;
 111         const int subc = (addr & 0x0000e000) >> 13;
 112         const int mthd = (addr & 0x00001ffc);
 113         const u32 mask = 0x0000000f << (subc * 4);
 114         u32 engine = nvkm_rd32(device, 0x003280);
 115         bool handled = false;
 116
 117         switch (mthd) {
 118         case 0x0000 ... 0x0000: /* subchannel's engine -> software */
 119                 nvkm_wr32(device, 0x003280, (engine &= ~mask));
 120                 /* fall through */
 121         case 0x0180 ... 0x01fc: /* handle -> instance */
 122                 data = nvkm_rd32(device, 0x003258) & 0x0000ffff;
 123                 /* fall through */
 124         case 0x0100 ... 0x017c:
 125         case 0x0200 ... 0x1ffc: /* pass method down to sw */
 126                 if (!(engine & mask) && sw)
 127                         handled = nvkm_sw_mthd(sw, chid, subc, mthd, data);
 128                 break;
 129         default:
 130                 break;
 131         }
 132
 133         return handled;
 134 }
 135
 136 static void
 137 nv04_fifo_cache_error(struct nv04_fifo *fifo, u32 chid, u32 get)
 138 {
 139         struct nvkm_subdev *subdev = &fifo->base.engine.subdev;
 140         struct nvkm_device *device = subdev->device;
 141         struct nvkm_fifo_chan *chan;
 142         unsigned long flags;
 143         u32 pull0 = nvkm_rd32(device, 0x003250);
 144         u32 mthd, data;
 145         int ptr;
 146
 147         /* NV_PFIFO_CACHE1_GET actually goes to 0xffc before wrapping on my
 148          * G80 chips, but CACHE1 isn't big enough for this much data.. Tests
 149          * show that it wraps around to the start at GET=0x800.. No clue as to
 150          * why..
 151          */
 152         ptr = (get & 0x7ff) >> 2;
 153
 154         if (device->card_type < NV_40) {
 155                 mthd = nvkm_rd32(device, NV04_PFIFO_CACHE1_METHOD(ptr));
 156                 data = nvkm_rd32(device, NV04_PFIFO_CACHE1_DATA(ptr));
 157         } else {
 158                 mthd = nvkm_rd32(device, NV40_PFIFO_CACHE1_METHOD(ptr));
 159                 data = nvkm_rd32(device, NV40_PFIFO_CACHE1_DATA(ptr));
 160         }
 161
 162         if (!(pull0 & 0x00000100) ||
 163             !nv04_fifo_swmthd(device, chid, mthd, data)) {
 164                 chan = nvkm_fifo_chan_chid(&fifo->base, chid, &flags);
 165                 nvkm_error(subdev, "CACHE_ERROR - "
 166                            "ch %d [%s] subc %d mthd %04x data %08x\n",
 167                            chid, chan ? chan->object.client->name : "unknown",
 168                            (mthd >> 13) & 7, mthd & 0x1ffc, data);
 169                 nvkm_fifo_chan_put(&fifo->base, flags, &chan);
 170         }
 171
 172         nvkm_wr32(device, NV04_PFIFO_CACHE1_DMA_PUSH, 0);
 173         nvkm_wr32(device, NV03_PFIFO_INTR_0, NV_PFIFO_INTR_CACHE_ERROR);
 174
 175         nvkm_wr32(device, NV03_PFIFO_CACHE1_PUSH0,
 176                 nvkm_rd32(device, NV03_PFIFO_CACHE1_PUSH0) & ~1);
 177         nvkm_wr32(device, NV03_PFIFO_CACHE1_GET, get + 4);
 178         nvkm_wr32(device, NV03_PFIFO_CACHE1_PUSH0,
 179                 nvkm_rd32(device, NV03_PFIFO_CACHE1_PUSH0) | 1);
 180         nvkm_wr32(device, NV04_PFIFO_CACHE1_HASH, 0);
 181
 182         nvkm_wr32(device, NV04_PFIFO_CACHE1_DMA_PUSH,
 183                 nvkm_rd32(device, NV04_PFIFO_CACHE1_DMA_PUSH) | 1);
 184         nvkm_wr32(device, NV04_PFIFO_CACHE1_PULL0, 1);
 185 }
 186
 187 static void
 188 nv04_fifo_dma_pusher(struct nv04_fifo *fifo, u32 chid)
 189 {
 190         struct nvkm_subdev *subdev = &fifo->base.engine.subdev;
 191         struct nvkm_device *device = subdev->device;
 192         u32 dma_get = nvkm_rd32(device, 0x003244);
 193         u32 dma_put = nvkm_rd32(device, 0x003240);
 194         u32 push = nvkm_rd32(device, 0x003220);
 195         u32 state = nvkm_rd32(device, 0x003228);
 196         struct nvkm_fifo_chan *chan;
 197         unsigned long flags;
 198         const char *name;
 199
 200         chan = nvkm_fifo_chan_chid(&fifo->base, chid, &flags);
 201         name = chan ? chan->object.client->name : "unknown";
 202         if (device->card_type == NV_50) {
 203                 u32 ho_get = nvkm_rd32(device, 0x003328);
 204                 u32 ho_put = nvkm_rd32(device, 0x003320);
 205                 u32 ib_get = nvkm_rd32(device, 0x003334);
 206                 u32 ib_put = nvkm_rd32(device, 0x003330);
 207
 208                 nvkm_error(subdev, "DMA_PUSHER - "
 209                            "ch %d [%s] get %02x%08x put %02x%08x ib_get %08x "
 210                            "ib_put %08x state %08x (err: %s) push %08x\n",
 211                            chid, name, ho_get, dma_get, ho_put, dma_put,
 212                            ib_get, ib_put, state, nv_dma_state_err(state),
 213                            push);
 214
 215                 /* METHOD_COUNT, in DMA_STATE on earlier chipsets */
 216                 nvkm_wr32(device, 0x003364, 0x00000000);
 217                 if (dma_get != dma_put || ho_get != ho_put) {
 218                         nvkm_wr32(device, 0x003244, dma_put);
 219                         nvkm_wr32(device, 0x003328, ho_put);
 220                 } else
 221                 if (ib_get != ib_put)
 222                         nvkm_wr32(device, 0x003334, ib_put);
 223         } else {
 224                 nvkm_error(subdev, "DMA_PUSHER - ch %d [%s] get %08x put %08x "
 225                                    "state %08x (err: %s) push %08x\n",
 226                            chid, name, dma_get, dma_put, state,
 227                            nv_dma_state_err(state), push);
 228
 229                 if (dma_get != dma_put)
 230                         nvkm_wr32(device, 0x003244, dma_put);
 231         }
 232         nvkm_fifo_chan_put(&fifo->base, flags, &chan);
 233
 234         nvkm_wr32(device, 0x003228, 0x00000000);
 235         nvkm_wr32(device, 0x003220, 0x00000001);
 236         nvkm_wr32(device, 0x002100, NV_PFIFO_INTR_DMA_PUSHER);
 237 }
 238
 239 void
 240 nv04_fifo_intr(struct nvkm_fifo *base)
 241 {
 242         struct nv04_fifo *fifo = nv04_fifo(base);
 243         struct nvkm_subdev *subdev = &fifo->base.engine.subdev;
 244         struct nvkm_device *device = subdev->device;
 245         u32 mask = nvkm_rd32(device, NV03_PFIFO_INTR_EN_0);
 246         u32 stat = nvkm_rd32(device, NV03_PFIFO_INTR_0) & mask;
 247         u32 reassign, chid, get, sem;
 248
 249         reassign = nvkm_rd32(device, NV03_PFIFO_CACHES) & 1;
 250         nvkm_wr32(device, NV03_PFIFO_CACHES, 0);
 251
 252         chid = nvkm_rd32(device, NV03_PFIFO_CACHE1_PUSH1) & (fifo->base.nr - 1);
 253         get  = nvkm_rd32(device, NV03_PFIFO_CACHE1_GET);
 254
 255         if (stat & NV_PFIFO_INTR_CACHE_ERROR) {
 256                 nv04_fifo_cache_error(fifo, chid, get);
 257                 stat &= ~NV_PFIFO_INTR_CACHE_ERROR;
 258         }
 259
 260         if (stat & NV_PFIFO_INTR_DMA_PUSHER) {
 261                 nv04_fifo_dma_pusher(fifo, chid);
 262                 stat &= ~NV_PFIFO_INTR_DMA_PUSHER;
 263         }
 264
 265         if (stat & NV_PFIFO_INTR_SEMAPHORE) {
 266                 stat &= ~NV_PFIFO_INTR_SEMAPHORE;
 267                 nvkm_wr32(device, NV03_PFIFO_INTR_0, NV_PFIFO_INTR_SEMAPHORE);
 268
 269                 sem = nvkm_rd32(device, NV10_PFIFO_CACHE1_SEMAPHORE);
 270                 nvkm_wr32(device, NV10_PFIFO_CACHE1_SEMAPHORE, sem | 0x1);
 271
 272                 nvkm_wr32(device, NV03_PFIFO_CACHE1_GET, get + 4);
 273                 nvkm_wr32(device, NV04_PFIFO_CACHE1_PULL0, 1);
 274         }
 275
 276         if (device->card_type == NV_50) {
 277                 if (stat & 0x00000010) {
 278                         stat &= ~0x00000010;
 279                         nvkm_wr32(device, 0x002100, 0x00000010);
 280                 }
 281
 282                 if (stat & 0x40000000) {
 283                         nvkm_wr32(device, 0x002100, 0x40000000);
 284                         nvkm_fifo_uevent(&fifo->base);
 285                         stat &= ~0x40000000;
 286                 }
 287         }
 288
 289         if (stat) {
 290                 nvkm_warn(subdev, "intr %08x\n", stat);
 291                 nvkm_mask(device, NV03_PFIFO_INTR_EN_0, stat, 0x00000000);
 292                 nvkm_wr32(device, NV03_PFIFO_INTR_0, stat);
 293         }
 294
 295         nvkm_wr32(device, NV03_PFIFO_CACHES, reassign);
 296 }
 297
 298 void
 299 nv04_fifo_init(struct nvkm_fifo *base)
 300 {
 301         struct nv04_fifo *fifo = nv04_fifo(base);
 302         struct nvkm_device *device = fifo->base.engine.subdev.device;
 303         struct nvkm_instmem *imem = device->imem;
 304         struct nvkm_ramht *ramht = imem->ramht;
 305         struct nvkm_memory *ramro = imem->ramro;
 306         struct nvkm_memory *ramfc = imem->ramfc;
 307
 308         nvkm_wr32(device, NV04_PFIFO_DELAY_0, 0x000000ff);
 309         nvkm_wr32(device, NV04_PFIFO_DMA_TIMESLICE, 0x0101ffff);
 310
 311         nvkm_wr32(device, NV03_PFIFO_RAMHT, (0x03 << 24) /* search 128 */ |
 312                                             ((ramht->bits - 9) << 16) |
 313                                             (ramht->gpuobj->addr >> 8));
 314         nvkm_wr32(device, NV03_PFIFO_RAMRO, nvkm_memory_addr(ramro) >> 8);
 315         nvkm_wr32(device, NV03_PFIFO_RAMFC, nvkm_memory_addr(ramfc) >> 8);
 316
 317         nvkm_wr32(device, NV03_PFIFO_CACHE1_PUSH1, fifo->base.nr - 1);
 318
 319         nvkm_wr32(device, NV03_PFIFO_INTR_0, 0xffffffff);
 320         nvkm_wr32(device, NV03_PFIFO_INTR_EN_0, 0xffffffff);
 321
 322         nvkm_wr32(device, NV03_PFIFO_CACHE1_PUSH0, 1);
 323         nvkm_wr32(device, NV04_PFIFO_CACHE1_PULL0, 1);
 324         nvkm_wr32(device, NV03_PFIFO_CACHES, 1);
 325 }
 326
 327 int
 328 nv04_fifo_new_(const struct nvkm_fifo_func *func, struct nvkm_device *device,
 329                int index, int nr, const struct nv04_fifo_ramfc *ramfc,
 330                struct nvkm_fifo **pfifo)
 331 {
 332         struct nv04_fifo *fifo;
 333         int ret;
 334
 335         if (!(fifo = kzalloc(sizeof(*fifo), GFP_KERNEL)))
 336                 return -ENOMEM;
 337         fifo->ramfc = ramfc;
 338         *pfifo = &fifo->base;
 339
 340         ret = nvkm_fifo_ctor(func, device, index, nr, &fifo->base);
 341         if (ret)
 342                 return ret;
 343
 344         set_bit(nr - 1, fifo->base.mask); /* inactive channel */
 345         return 0;
 346 }
 347
 348 static const struct nvkm_fifo_func
 349 nv04_fifo = {
 350         .init = nv04_fifo_init,
 351         .intr = nv04_fifo_intr,
 352         .pause = nv04_fifo_pause,
 353         .start = nv04_fifo_start,
 354         .chan = {
 355                 &nv04_fifo_dma_oclass,
 356                 NULL
 357         },
 358 };
 359
 360 int
 361 nv04_fifo_new(struct nvkm_device *device, int index, struct nvkm_fifo **pfifo)
 362 {
 363         return nv04_fifo_new_(&nv04_fifo, device, index, 16,
 364                               nv04_fifo_ramfc, pfifo);
 365 }