kernel/drivers/gpu/drm/nouveau/nouveau_chan.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
  25 #include <nvif/os.h>
  26 #include <nvif/class.h>
  27 #include <nvif/ioctl.h>
  28
  29 /*XXX*/
  30 #include <core/client.h>
  31
  32 #include "nouveau_drm.h"
  33 #include "nouveau_dma.h"
  34 #include "nouveau_bo.h"
  35 #include "nouveau_chan.h"
  36 #include "nouveau_fence.h"
  37 #include "nouveau_abi16.h"
  38
  39 MODULE_PARM_DESC(vram_pushbuf, "Create DMA push buffers in VRAM");
  40 int nouveau_vram_pushbuf;
  41 module_param_named(vram_pushbuf, nouveau_vram_pushbuf, int, 0400);
  42
  43 int
  44 nouveau_channel_idle(struct nouveau_channel *chan)
  45 {
  46         if (likely(chan && chan->fence)) {
  47                 struct nouveau_cli *cli = (void *)chan->user.client;
  48                 struct nouveau_fence *fence = NULL;
  49                 int ret;
  50
  51                 ret = nouveau_fence_new(chan, false, &fence);
  52                 if (!ret) {
  53                         ret = nouveau_fence_wait(fence, false, false);
  54                         nouveau_fence_unref(&fence);
  55                 }
  56
  57                 if (ret) {
  58                         NV_PRINTK(err, cli, "failed to idle channel %d [%s]\n",
  59                                   chan->chid, nvxx_client(&cli->base)->name);
  60                         return ret;
  61                 }
  62         }
  63         return 0;
  64 }
  65
  66 void
  67 nouveau_channel_del(struct nouveau_channel **pchan)
  68 {
  69         struct nouveau_channel *chan = *pchan;
  70         if (chan) {
  71                 if (chan->fence)
  72                         nouveau_fence(chan->drm)->context_del(chan);
  73                 nvif_object_fini(&chan->nvsw);
  74                 nvif_object_fini(&chan->gart);
  75                 nvif_object_fini(&chan->vram);
  76                 nvif_object_fini(&chan->user);
  77                 nvif_object_fini(&chan->push.ctxdma);
  78                 nouveau_bo_vma_del(chan->push.buffer, &chan->push.vma);
  79                 nouveau_bo_unmap(chan->push.buffer);
  80                 if (chan->push.buffer && chan->push.buffer->pin_refcnt)
  81                         nouveau_bo_unpin(chan->push.buffer);
  82                 nouveau_bo_ref(NULL, &chan->push.buffer);
  83                 kfree(chan);
  84         }
  85         *pchan = NULL;
  86 }
  87
  88 static int
  89 nouveau_channel_prep(struct nouveau_drm *drm, struct nvif_device *device,
  90                      u32 size, struct nouveau_channel **pchan)
  91 {
  92         struct nouveau_cli *cli = (void *)device->object.client;
  93         struct nvkm_mmu *mmu = nvxx_mmu(device);
  94         struct nv_dma_v0 args = {};
  95         struct nouveau_channel *chan;
  96         u32 target;
  97         int ret;
  98
  99         chan = *pchan = kzalloc(sizeof(*chan), GFP_KERNEL);
 100         if (!chan)
 101                 return -ENOMEM;
 102
 103         chan->device = device;
 104         chan->drm = drm;
 105
 106         /* allocate memory for dma push buffer */
 107         target = TTM_PL_FLAG_TT | TTM_PL_FLAG_UNCACHED;
 108         if (nouveau_vram_pushbuf)
 109                 target = TTM_PL_FLAG_VRAM;
 110
 111         ret = nouveau_bo_new(drm->dev, size, 0, target, 0, 0, NULL, NULL,
 112                             &chan->push.buffer);
 113         if (ret == 0) {
 114                 ret = nouveau_bo_pin(chan->push.buffer, target, false);
 115                 if (ret == 0)
 116                         ret = nouveau_bo_map(chan->push.buffer);
 117         }
 118
 119         if (ret) {
 120                 nouveau_channel_del(pchan);
 121                 return ret;
 122         }
 123
 124         /* create dma object covering the *entire* memory space that the
 125          * pushbuf lives in, this is because the GEM code requires that
 126          * we be able to call out to other (indirect) push buffers
 127          */
 128         chan->push.vma.offset = chan->push.buffer->bo.offset;
 129
 130         if (device->info.family >= NV_DEVICE_INFO_V0_TESLA) {
 131                 ret = nouveau_bo_vma_add(chan->push.buffer, cli->vm,
 132                                         &chan->push.vma);
 133                 if (ret) {
 134                         nouveau_channel_del(pchan);
 135                         return ret;
 136                 }
 137
 138                 args.target = NV_DMA_V0_TARGET_VM;
 139                 args.access = NV_DMA_V0_ACCESS_VM;
 140                 args.start = 0;
 141                 args.limit = cli->vm->mmu->limit - 1;
 142         } else
 143         if (chan->push.buffer->bo.mem.mem_type == TTM_PL_VRAM) {
 144                 if (device->info.family == NV_DEVICE_INFO_V0_TNT) {
 145                         /* nv04 vram pushbuf hack, retarget to its location in
 146                          * the framebuffer bar rather than direct vram access..
 147                          * nfi why this exists, it came from the -nv ddx.
 148                          */
 149                         args.target = NV_DMA_V0_TARGET_PCI;
 150                         args.access = NV_DMA_V0_ACCESS_RDWR;
 151                         args.start = nvxx_device(device)->func->
 152                                 resource_addr(nvxx_device(device), 1);
 153                         args.limit = args.start + device->info.ram_user - 1;
 154                 } else {
 155                         args.target = NV_DMA_V0_TARGET_VRAM;
 156                         args.access = NV_DMA_V0_ACCESS_RDWR;
 157                         args.start = 0;
 158                         args.limit = device->info.ram_user - 1;
 159                 }
 160         } else {
 161                 if (chan->drm->agp.bridge) {
 162                         args.target = NV_DMA_V0_TARGET_AGP;
 163                         args.access = NV_DMA_V0_ACCESS_RDWR;
 164                         args.start = chan->drm->agp.base;
 165                         args.limit = chan->drm->agp.base +
 166                                      chan->drm->agp.size - 1;
 167                 } else {
 168                         args.target = NV_DMA_V0_TARGET_VM;
 169                         args.access = NV_DMA_V0_ACCESS_RDWR;
 170                         args.start = 0;
 171                         args.limit = mmu->limit - 1;
 172                 }
 173         }
 174
 175         ret = nvif_object_init(&device->object, 0, NV_DMA_FROM_MEMORY,
 176                                &args, sizeof(args), &chan->push.ctxdma);
 177         if (ret) {
 178                 nouveau_channel_del(pchan);
 179                 return ret;
 180         }
 181
 182         return 0;
 183 }
 184
 185 static int
 186 nouveau_channel_ind(struct nouveau_drm *drm, struct nvif_device *device,
 187                     u32 engine, struct nouveau_channel **pchan)
 188 {
 189         static const u16 oclasses[] = { MAXWELL_CHANNEL_GPFIFO_A,
 190                                         KEPLER_CHANNEL_GPFIFO_A,
 191                                         FERMI_CHANNEL_GPFIFO,
 192                                         G82_CHANNEL_GPFIFO,
 193                                         NV50_CHANNEL_GPFIFO,
 194                                         0 };
 195         const u16 *oclass = oclasses;
 196         union {
 197                 struct nv50_channel_gpfifo_v0 nv50;
 198                 struct fermi_channel_gpfifo_v0 fermi;
 199                 struct kepler_channel_gpfifo_a_v0 kepler;
 200         } args;
 201         struct nouveau_channel *chan;
 202         u32 size;
 203         int ret;
 204
 205         /* allocate dma push buffer */
 206         ret = nouveau_channel_prep(drm, device, 0x12000, &chan);
 207         *pchan = chan;
 208         if (ret)
 209                 return ret;
 210
 211         /* create channel object */
 212         do {
 213                 if (oclass[0] >= KEPLER_CHANNEL_GPFIFO_A) {
 214                         args.kepler.version = 0;
 215                         args.kepler.engine  = engine;
 216                         args.kepler.ilength = 0x02000;
 217                         args.kepler.ioffset = 0x10000 + chan->push.vma.offset;
 218                         args.kepler.vm = 0;
 219                         size = sizeof(args.kepler);
 220                 } else
 221                 if (oclass[0] >= FERMI_CHANNEL_GPFIFO) {
 222                         args.fermi.version = 0;
 223                         args.fermi.ilength = 0x02000;
 224                         args.fermi.ioffset = 0x10000 + chan->push.vma.offset;
 225                         args.fermi.vm = 0;
 226                         size = sizeof(args.fermi);
 227                 } else {
 228                         args.nv50.version = 0;
 229                         args.nv50.ilength = 0x02000;
 230                         args.nv50.ioffset = 0x10000 + chan->push.vma.offset;
 231                         args.nv50.pushbuf = nvif_handle(&chan->push.ctxdma);
 232                         args.nv50.vm = 0;
 233                         size = sizeof(args.nv50);
 234                 }
 235
 236                 ret = nvif_object_init(&device->object, 0, *oclass++,
 237                                        &args, size, &chan->user);
 238                 if (ret == 0) {
 239                         if (chan->user.oclass >= KEPLER_CHANNEL_GPFIFO_A)
 240                                 chan->chid = args.kepler.chid;
 241                         else
 242                         if (chan->user.oclass >= FERMI_CHANNEL_GPFIFO)
 243                                 chan->chid = args.fermi.chid;
 244                         else
 245                                 chan->chid = args.nv50.chid;
 246                         return ret;
 247                 }
 248         } while (*oclass);
 249
 250         nouveau_channel_del(pchan);
 251         return ret;
 252 }
 253
 254 static int
 255 nouveau_channel_dma(struct nouveau_drm *drm, struct nvif_device *device,
 256                     struct nouveau_channel **pchan)
 257 {
 258         static const u16 oclasses[] = { NV40_CHANNEL_DMA,
 259                                         NV17_CHANNEL_DMA,
 260                                         NV10_CHANNEL_DMA,
 261                                         NV03_CHANNEL_DMA,
 262                                         0 };
 263         const u16 *oclass = oclasses;
 264         struct nv03_channel_dma_v0 args;
 265         struct nouveau_channel *chan;
 266         int ret;
 267
 268         /* allocate dma push buffer */
 269         ret = nouveau_channel_prep(drm, device, 0x10000, &chan);
 270         *pchan = chan;
 271         if (ret)
 272                 return ret;
 273
 274         /* create channel object */
 275         args.version = 0;
 276         args.pushbuf = nvif_handle(&chan->push.ctxdma);
 277         args.offset = chan->push.vma.offset;
 278
 279         do {
 280                 ret = nvif_object_init(&device->object, 0, *oclass++,
 281                                        &args, sizeof(args), &chan->user);
 282                 if (ret == 0) {
 283                         chan->chid = args.chid;
 284                         return ret;
 285                 }
 286         } while (ret && *oclass);
 287
 288         nouveau_channel_del(pchan);
 289         return ret;
 290 }
 291
 292 static int
 293 nouveau_channel_init(struct nouveau_channel *chan, u32 vram, u32 gart)
 294 {
 295         struct nvif_device *device = chan->device;
 296         struct nouveau_cli *cli = (void *)chan->user.client;
 297         struct nvkm_mmu *mmu = nvxx_mmu(device);
 298         struct nv_dma_v0 args = {};
 299         int ret, i;
 300
 301         nvif_object_map(&chan->user);
 302
 303         /* allocate dma objects to cover all allowed vram, and gart */
 304         if (device->info.family < NV_DEVICE_INFO_V0_FERMI) {
 305                 if (device->info.family >= NV_DEVICE_INFO_V0_TESLA) {
 306                         args.target = NV_DMA_V0_TARGET_VM;
 307                         args.access = NV_DMA_V0_ACCESS_VM;
 308                         args.start = 0;
 309                         args.limit = cli->vm->mmu->limit - 1;
 310                 } else {
 311                         args.target = NV_DMA_V0_TARGET_VRAM;
 312                         args.access = NV_DMA_V0_ACCESS_RDWR;
 313                         args.start = 0;
 314                         args.limit = device->info.ram_user - 1;
 315                 }
 316
 317                 ret = nvif_object_init(&chan->user, vram, NV_DMA_IN_MEMORY,
 318                                        &args, sizeof(args), &chan->vram);
 319                 if (ret)
 320                         return ret;
 321
 322                 if (device->info.family >= NV_DEVICE_INFO_V0_TESLA) {
 323                         args.target = NV_DMA_V0_TARGET_VM;
 324                         args.access = NV_DMA_V0_ACCESS_VM;
 325                         args.start = 0;
 326                         args.limit = cli->vm->mmu->limit - 1;
 327                 } else
 328                 if (chan->drm->agp.bridge) {
 329                         args.target = NV_DMA_V0_TARGET_AGP;
 330                         args.access = NV_DMA_V0_ACCESS_RDWR;
 331                         args.start = chan->drm->agp.base;
 332                         args.limit = chan->drm->agp.base +
 333                                      chan->drm->agp.size - 1;
 334                 } else {
 335                         args.target = NV_DMA_V0_TARGET_VM;
 336                         args.access = NV_DMA_V0_ACCESS_RDWR;
 337                         args.start = 0;
 338                         args.limit = mmu->limit - 1;
 339                 }
 340
 341                 ret = nvif_object_init(&chan->user, gart, NV_DMA_IN_MEMORY,
 342                                        &args, sizeof(args), &chan->gart);
 343                 if (ret)
 344                         return ret;
 345         }
 346
 347         /* initialise dma tracking parameters */
 348         switch (chan->user.oclass & 0x00ff) {
 349         case 0x006b:
 350         case 0x006e:
 351                 chan->user_put = 0x40;
 352                 chan->user_get = 0x44;
 353                 chan->dma.max = (0x10000 / 4) - 2;
 354                 break;
 355         default:
 356                 chan->user_put = 0x40;
 357                 chan->user_get = 0x44;
 358                 chan->user_get_hi = 0x60;
 359                 chan->dma.ib_base =  0x10000 / 4;
 360                 chan->dma.ib_max  = (0x02000 / 8) - 1;
 361                 chan->dma.ib_put  = 0;
 362                 chan->dma.ib_free = chan->dma.ib_max - chan->dma.ib_put;
 363                 chan->dma.max = chan->dma.ib_base;
 364                 break;
 365         }
 366
 367         chan->dma.put = 0;
 368         chan->dma.cur = chan->dma.put;
 369         chan->dma.free = chan->dma.max - chan->dma.cur;
 370
 371         ret = RING_SPACE(chan, NOUVEAU_DMA_SKIPS);
 372         if (ret)
 373                 return ret;
 374
 375         for (i = 0; i < NOUVEAU_DMA_SKIPS; i++)
 376                 OUT_RING(chan, 0x00000000);
 377
 378         /* allocate software object class (used for fences on <= nv05) */
 379         if (device->info.family < NV_DEVICE_INFO_V0_CELSIUS) {
 380                 ret = nvif_object_init(&chan->user, 0x006e,
 381                                        NVIF_IOCTL_NEW_V0_SW_NV04,
 382                                        NULL, 0, &chan->nvsw);
 383                 if (ret)
 384                         return ret;
 385
 386                 ret = RING_SPACE(chan, 2);
 387                 if (ret)
 388                         return ret;
 389
 390                 BEGIN_NV04(chan, NvSubSw, 0x0000, 1);
 391                 OUT_RING  (chan, chan->nvsw.handle);
 392                 FIRE_RING (chan);
 393         }
 394
 395         /* initialise synchronisation */
 396         return nouveau_fence(chan->drm)->context_new(chan);
 397 }
 398
 399 int
 400 nouveau_channel_new(struct nouveau_drm *drm, struct nvif_device *device,
 401                     u32 arg0, u32 arg1, struct nouveau_channel **pchan)
 402 {
 403         struct nouveau_cli *cli = (void *)device->object.client;
 404         bool super;
 405         int ret;
 406
 407         /* hack until fencenv50 is fixed, and agp access relaxed */
 408         super = cli->base.super;
 409         cli->base.super = true;
 410
 411         ret = nouveau_channel_ind(drm, device, arg0, pchan);
 412         if (ret) {
 413                 NV_PRINTK(dbg, cli, "ib channel create, %d\n", ret);
 414                 ret = nouveau_channel_dma(drm, device, pchan);
 415                 if (ret) {
 416                         NV_PRINTK(dbg, cli, "dma channel create, %d\n", ret);
 417                         goto done;
 418                 }
 419         }
 420
 421         ret = nouveau_channel_init(*pchan, arg0, arg1);
 422         if (ret) {
 423                 NV_PRINTK(err, cli, "channel failed to initialise, %d\n", ret);
 424                 nouveau_channel_del(pchan);
 425         }
 426
 427 done:
 428         cli->base.super = super;
 429         return ret;
 430 }