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/cl0002.h>
  28 #include <nvif/cl006b.h>
  29 #include <nvif/cl506f.h>
  30 #include <nvif/cl906f.h>
  31 #include <nvif/cla06f.h>
  32 #include <nvif/ioctl.h>
  33
  34 /*XXX*/
  35 #include <core/client.h>
  36
  37 #include "nouveau_drv.h"
  38 #include "nouveau_dma.h"
  39 #include "nouveau_bo.h"
  40 #include "nouveau_chan.h"
  41 #include "nouveau_fence.h"
  42 #include "nouveau_abi16.h"
  43 #include "nouveau_vmm.h"
  44
  45 MODULE_PARM_DESC(vram_pushbuf, "Create DMA push buffers in VRAM");
  46 int nouveau_vram_pushbuf;
  47 module_param_named(vram_pushbuf, nouveau_vram_pushbuf, int, 0400);
  48
  49 static int
  50 nouveau_channel_killed(struct nvif_notify *ntfy)
  51 {
  52         struct nouveau_channel *chan = container_of(ntfy, typeof(*chan), kill);
  53         struct nouveau_cli *cli = (void *)chan->user.client;
  54         NV_PRINTK(warn, cli, "channel %d killed!\n", chan->chid);
  55         atomic_set(&chan->killed, 1);
  56         return NVIF_NOTIFY_DROP;
  57 }
  58
  59 int
  60 nouveau_channel_idle(struct nouveau_channel *chan)
  61 {
  62         if (likely(chan && chan->fence && !atomic_read(&chan->killed))) {
  63                 struct nouveau_cli *cli = (void *)chan->user.client;
  64                 struct nouveau_fence *fence = NULL;
  65                 int ret;
  66
  67                 ret = nouveau_fence_new(chan, false, &fence);
  68                 if (!ret) {
  69                         ret = nouveau_fence_wait(fence, false, false);
  70                         nouveau_fence_unref(&fence);
  71                 }
  72
  73                 if (ret) {
  74                         NV_PRINTK(err, cli, "failed to idle channel %d [%s]\n",
  75                                   chan->chid, nvxx_client(&cli->base)->name);
  76                         return ret;
  77                 }
  78         }
  79         return 0;
  80 }
  81
  82 void
  83 nouveau_channel_del(struct nouveau_channel **pchan)
  84 {
  85         struct nouveau_channel *chan = *pchan;
  86         if (chan) {
  87                 struct nouveau_cli *cli = (void *)chan->user.client;
  88                 bool super;
  89
  90                 if (cli) {
  91                         super = cli->base.super;
  92                         cli->base.super = true;
  93                 }
  94
  95                 if (chan->fence)
  96                         nouveau_fence(chan->drm)->context_del(chan);
  97                 nvif_object_fini(&chan->nvsw);
  98                 nvif_object_fini(&chan->gart);
  99                 nvif_object_fini(&chan->vram);
 100                 nvif_notify_fini(&chan->kill);
 101                 nvif_object_fini(&chan->user);
 102                 nvif_object_fini(&chan->push.ctxdma);
 103                 nouveau_vma_del(&chan->push.vma);
 104                 nouveau_bo_unmap(chan->push.buffer);
 105                 if (chan->push.buffer && chan->push.buffer->pin_refcnt)
 106                         nouveau_bo_unpin(chan->push.buffer);
 107                 nouveau_bo_ref(NULL, &chan->push.buffer);
 108                 kfree(chan);
 109
 110                 if (cli)
 111                         cli->base.super = super;
 112         }
 113         *pchan = NULL;
 114 }
 115
 116 static int
 117 nouveau_channel_prep(struct nouveau_drm *drm, struct nvif_device *device,
 118                      u32 size, struct nouveau_channel **pchan)
 119 {
 120         struct nouveau_cli *cli = (void *)device->object.client;
 121         struct nv_dma_v0 args = {};
 122         struct nouveau_channel *chan;
 123         u32 target;
 124         int ret;
 125
 126         chan = *pchan = kzalloc(sizeof(*chan), GFP_KERNEL);
 127         if (!chan)
 128                 return -ENOMEM;
 129
 130         chan->device = device;
 131         chan->drm = drm;
 132         atomic_set(&chan->killed, 0);
 133
 134         /* allocate memory for dma push buffer */
 135         target = TTM_PL_FLAG_TT | TTM_PL_FLAG_UNCACHED;
 136         if (nouveau_vram_pushbuf)
 137                 target = TTM_PL_FLAG_VRAM;
 138
 139         ret = nouveau_bo_new(cli, size, 0, target, 0, 0, NULL, NULL,
 140                             &chan->push.buffer);
 141         if (ret == 0) {
 142                 ret = nouveau_bo_pin(chan->push.buffer, target, false);
 143                 if (ret == 0)
 144                         ret = nouveau_bo_map(chan->push.buffer);
 145         }
 146
 147         if (ret) {
 148                 nouveau_channel_del(pchan);
 149                 return ret;
 150         }
 151
 152         /* create dma object covering the *entire* memory space that the
 153          * pushbuf lives in, this is because the GEM code requires that
 154          * we be able to call out to other (indirect) push buffers
 155          */
 156         chan->push.addr = chan->push.buffer->bo.offset;
 157
 158         if (device->info.family >= NV_DEVICE_INFO_V0_TESLA) {
 159                 ret = nouveau_vma_new(chan->push.buffer, &cli->vmm,
 160                                       &chan->push.vma);
 161                 if (ret) {
 162                         nouveau_channel_del(pchan);
 163                         return ret;
 164                 }
 165
 166                 chan->push.addr = chan->push.vma->addr;
 167
 168                 if (device->info.family >= NV_DEVICE_INFO_V0_FERMI)
 169                         return 0;
 170
 171                 args.target = NV_DMA_V0_TARGET_VM;
 172                 args.access = NV_DMA_V0_ACCESS_VM;
 173                 args.start = 0;
 174                 args.limit = cli->vmm.vmm.limit - 1;
 175         } else
 176         if (chan->push.buffer->bo.mem.mem_type == TTM_PL_VRAM) {
 177                 if (device->info.family == NV_DEVICE_INFO_V0_TNT) {
 178                         /* nv04 vram pushbuf hack, retarget to its location in
 179                          * the framebuffer bar rather than direct vram access..
 180                          * nfi why this exists, it came from the -nv ddx.
 181                          */
 182                         args.target = NV_DMA_V0_TARGET_PCI;
 183                         args.access = NV_DMA_V0_ACCESS_RDWR;
 184                         args.start = nvxx_device(device)->func->
 185                                 resource_addr(nvxx_device(device), 1);
 186                         args.limit = args.start + device->info.ram_user - 1;
 187                 } else {
 188                         args.target = NV_DMA_V0_TARGET_VRAM;
 189                         args.access = NV_DMA_V0_ACCESS_RDWR;
 190                         args.start = 0;
 191                         args.limit = device->info.ram_user - 1;
 192                 }
 193         } else {
 194                 if (chan->drm->agp.bridge) {
 195                         args.target = NV_DMA_V0_TARGET_AGP;
 196                         args.access = NV_DMA_V0_ACCESS_RDWR;
 197                         args.start = chan->drm->agp.base;
 198                         args.limit = chan->drm->agp.base +
 199                                      chan->drm->agp.size - 1;
 200                 } else {
 201                         args.target = NV_DMA_V0_TARGET_VM;
 202                         args.access = NV_DMA_V0_ACCESS_RDWR;
 203                         args.start = 0;
 204                         args.limit = cli->vmm.vmm.limit - 1;
 205                 }
 206         }
 207
 208         ret = nvif_object_init(&device->object, 0, NV_DMA_FROM_MEMORY,
 209                                &args, sizeof(args), &chan->push.ctxdma);
 210         if (ret) {
 211                 nouveau_channel_del(pchan);
 212                 return ret;
 213         }
 214
 215         return 0;
 216 }
 217
 218 static int
 219 nouveau_channel_ind(struct nouveau_drm *drm, struct nvif_device *device,
 220                     u64 runlist, struct nouveau_channel **pchan)
 221 {
 222         struct nouveau_cli *cli = (void *)device->object.client;
 223         static const u16 oclasses[] = { VOLTA_CHANNEL_GPFIFO_A,
 224                                         PASCAL_CHANNEL_GPFIFO_A,
 225                                         MAXWELL_CHANNEL_GPFIFO_A,
 226                                         KEPLER_CHANNEL_GPFIFO_B,
 227                                         KEPLER_CHANNEL_GPFIFO_A,
 228                                         FERMI_CHANNEL_GPFIFO,
 229                                         G82_CHANNEL_GPFIFO,
 230                                         NV50_CHANNEL_GPFIFO,
 231                                         0 };
 232         const u16 *oclass = oclasses;
 233         union {
 234                 struct nv50_channel_gpfifo_v0 nv50;
 235                 struct fermi_channel_gpfifo_v0 fermi;
 236                 struct kepler_channel_gpfifo_a_v0 kepler;
 237         } args;
 238         struct nouveau_channel *chan;
 239         u32 size;
 240         int ret;
 241
 242         /* allocate dma push buffer */
 243         ret = nouveau_channel_prep(drm, device, 0x12000, &chan);
 244         *pchan = chan;
 245         if (ret)
 246                 return ret;
 247
 248         /* create channel object */
 249         do {
 250                 if (oclass[0] >= KEPLER_CHANNEL_GPFIFO_A) {
 251                         args.kepler.version = 0;
 252                         args.kepler.ilength = 0x02000;
 253                         args.kepler.ioffset = 0x10000 + chan->push.addr;
 254                         args.kepler.runlist = runlist;
 255                         args.kepler.vmm = nvif_handle(&cli->vmm.vmm.object);
 256                         size = sizeof(args.kepler);
 257                 } else
 258                 if (oclass[0] >= FERMI_CHANNEL_GPFIFO) {
 259                         args.fermi.version = 0;
 260                         args.fermi.ilength = 0x02000;
 261                         args.fermi.ioffset = 0x10000 + chan->push.addr;
 262                         args.fermi.vmm = nvif_handle(&cli->vmm.vmm.object);
 263                         size = sizeof(args.fermi);
 264                 } else {
 265                         args.nv50.version = 0;
 266                         args.nv50.ilength = 0x02000;
 267                         args.nv50.ioffset = 0x10000 + chan->push.addr;
 268                         args.nv50.pushbuf = nvif_handle(&chan->push.ctxdma);
 269                         args.nv50.vmm = nvif_handle(&cli->vmm.vmm.object);
 270                         size = sizeof(args.nv50);
 271                 }
 272
 273                 ret = nvif_object_init(&device->object, 0, *oclass++,
 274                                        &args, size, &chan->user);
 275                 if (ret == 0) {
 276                         if (chan->user.oclass >= KEPLER_CHANNEL_GPFIFO_A)
 277                                 chan->chid = args.kepler.chid;
 278                         else
 279                         if (chan->user.oclass >= FERMI_CHANNEL_GPFIFO)
 280                                 chan->chid = args.fermi.chid;
 281                         else
 282                                 chan->chid = args.nv50.chid;
 283                         return ret;
 284                 }
 285         } while (*oclass);
 286
 287         nouveau_channel_del(pchan);
 288         return ret;
 289 }
 290
 291 static int
 292 nouveau_channel_dma(struct nouveau_drm *drm, struct nvif_device *device,
 293                     struct nouveau_channel **pchan)
 294 {
 295         static const u16 oclasses[] = { NV40_CHANNEL_DMA,
 296                                         NV17_CHANNEL_DMA,
 297                                         NV10_CHANNEL_DMA,
 298                                         NV03_CHANNEL_DMA,
 299                                         0 };
 300         const u16 *oclass = oclasses;
 301         struct nv03_channel_dma_v0 args;
 302         struct nouveau_channel *chan;
 303         int ret;
 304
 305         /* allocate dma push buffer */
 306         ret = nouveau_channel_prep(drm, device, 0x10000, &chan);
 307         *pchan = chan;
 308         if (ret)
 309                 return ret;
 310
 311         /* create channel object */
 312         args.version = 0;
 313         args.pushbuf = nvif_handle(&chan->push.ctxdma);
 314         args.offset = chan->push.addr;
 315
 316         do {
 317                 ret = nvif_object_init(&device->object, 0, *oclass++,
 318                                        &args, sizeof(args), &chan->user);
 319                 if (ret == 0) {
 320                         chan->chid = args.chid;
 321                         return ret;
 322                 }
 323         } while (ret && *oclass);
 324
 325         nouveau_channel_del(pchan);
 326         return ret;
 327 }
 328
 329 static int
 330 nouveau_channel_init(struct nouveau_channel *chan, u32 vram, u32 gart)
 331 {
 332         struct nvif_device *device = chan->device;
 333         struct nouveau_cli *cli = (void *)chan->user.client;
 334         struct nouveau_drm *drm = chan->drm;
 335         struct nv_dma_v0 args = {};
 336         int ret, i;
 337
 338         nvif_object_map(&chan->user, NULL, 0);
 339
 340         if (chan->user.oclass >= FERMI_CHANNEL_GPFIFO) {
 341                 ret = nvif_notify_init(&chan->user, nouveau_channel_killed,
 342                                        true, NV906F_V0_NTFY_KILLED,
 343                                        NULL, 0, 0, &chan->kill);
 344                 if (ret == 0)
 345                         ret = nvif_notify_get(&chan->kill);
 346                 if (ret) {
 347                         NV_ERROR(drm, "Failed to request channel kill "
 348                                       "notification: %d\n", ret);
 349                         return ret;
 350                 }
 351         }
 352
 353         /* allocate dma objects to cover all allowed vram, and gart */
 354         if (device->info.family < NV_DEVICE_INFO_V0_FERMI) {
 355                 if (device->info.family >= NV_DEVICE_INFO_V0_TESLA) {
 356                         args.target = NV_DMA_V0_TARGET_VM;
 357                         args.access = NV_DMA_V0_ACCESS_VM;
 358                         args.start = 0;
 359                         args.limit = cli->vmm.vmm.limit - 1;
 360                 } else {
 361                         args.target = NV_DMA_V0_TARGET_VRAM;
 362                         args.access = NV_DMA_V0_ACCESS_RDWR;
 363                         args.start = 0;
 364                         args.limit = device->info.ram_user - 1;
 365                 }
 366
 367                 ret = nvif_object_init(&chan->user, vram, NV_DMA_IN_MEMORY,
 368                                        &args, sizeof(args), &chan->vram);
 369                 if (ret)
 370                         return ret;
 371
 372                 if (device->info.family >= NV_DEVICE_INFO_V0_TESLA) {
 373                         args.target = NV_DMA_V0_TARGET_VM;
 374                         args.access = NV_DMA_V0_ACCESS_VM;
 375                         args.start = 0;
 376                         args.limit = cli->vmm.vmm.limit - 1;
 377                 } else
 378                 if (chan->drm->agp.bridge) {
 379                         args.target = NV_DMA_V0_TARGET_AGP;
 380                         args.access = NV_DMA_V0_ACCESS_RDWR;
 381                         args.start = chan->drm->agp.base;
 382                         args.limit = chan->drm->agp.base +
 383                                      chan->drm->agp.size - 1;
 384                 } else {
 385                         args.target = NV_DMA_V0_TARGET_VM;
 386                         args.access = NV_DMA_V0_ACCESS_RDWR;
 387                         args.start = 0;
 388                         args.limit = cli->vmm.vmm.limit - 1;
 389                 }
 390
 391                 ret = nvif_object_init(&chan->user, gart, NV_DMA_IN_MEMORY,
 392                                        &args, sizeof(args), &chan->gart);
 393                 if (ret)
 394                         return ret;
 395         }
 396
 397         /* initialise dma tracking parameters */
 398         switch (chan->user.oclass & 0x00ff) {
 399         case 0x006b:
 400         case 0x006e:
 401                 chan->user_put = 0x40;
 402                 chan->user_get = 0x44;
 403                 chan->dma.max = (0x10000 / 4) - 2;
 404                 break;
 405         default:
 406                 chan->user_put = 0x40;
 407                 chan->user_get = 0x44;
 408                 chan->user_get_hi = 0x60;
 409                 chan->dma.ib_base =  0x10000 / 4;
 410                 chan->dma.ib_max  = (0x02000 / 8) - 1;
 411                 chan->dma.ib_put  = 0;
 412                 chan->dma.ib_free = chan->dma.ib_max - chan->dma.ib_put;
 413                 chan->dma.max = chan->dma.ib_base;
 414                 break;
 415         }
 416
 417         chan->dma.put = 0;
 418         chan->dma.cur = chan->dma.put;
 419         chan->dma.free = chan->dma.max - chan->dma.cur;
 420
 421         ret = RING_SPACE(chan, NOUVEAU_DMA_SKIPS);
 422         if (ret)
 423                 return ret;
 424
 425         for (i = 0; i < NOUVEAU_DMA_SKIPS; i++)
 426                 OUT_RING(chan, 0x00000000);
 427
 428         /* allocate software object class (used for fences on <= nv05) */
 429         if (device->info.family < NV_DEVICE_INFO_V0_CELSIUS) {
 430                 ret = nvif_object_init(&chan->user, 0x006e,
 431                                        NVIF_CLASS_SW_NV04,
 432                                        NULL, 0, &chan->nvsw);
 433                 if (ret)
 434                         return ret;
 435
 436                 ret = RING_SPACE(chan, 2);
 437                 if (ret)
 438                         return ret;
 439
 440                 BEGIN_NV04(chan, NvSubSw, 0x0000, 1);
 441                 OUT_RING  (chan, chan->nvsw.handle);
 442                 FIRE_RING (chan);
 443         }
 444
 445         /* initialise synchronisation */
 446         return nouveau_fence(chan->drm)->context_new(chan);
 447 }
 448
 449 int
 450 nouveau_channel_new(struct nouveau_drm *drm, struct nvif_device *device,
 451                     u32 arg0, u32 arg1, struct nouveau_channel **pchan)
 452 {
 453         struct nouveau_cli *cli = (void *)device->object.client;
 454         bool super;
 455         int ret;
 456
 457         /* hack until fencenv50 is fixed, and agp access relaxed */
 458         super = cli->base.super;
 459         cli->base.super = true;
 460
 461         ret = nouveau_channel_ind(drm, device, arg0, pchan);
 462         if (ret) {
 463                 NV_PRINTK(dbg, cli, "ib channel create, %d\n", ret);
 464                 ret = nouveau_channel_dma(drm, device, pchan);
 465                 if (ret) {
 466                         NV_PRINTK(dbg, cli, "dma channel create, %d\n", ret);
 467                         goto done;
 468                 }
 469         }
 470
 471         ret = nouveau_channel_init(*pchan, arg0, arg1);
 472         if (ret) {
 473                 NV_PRINTK(err, cli, "channel failed to initialise, %d\n", ret);
 474                 nouveau_channel_del(pchan);
 475         }
 476
 477 done:
 478         cli->base.super = super;
 479         return ret;
 480 }
 481
 482 int
 483 nouveau_channels_init(struct nouveau_drm *drm)
 484 {
 485         struct {
 486                 struct nv_device_info_v1 m;
 487                 struct {
 488                         struct nv_device_info_v1_data channels;
 489                 } v;
 490         } args = {
 491                 .m.version = 1,
 492                 .m.count = sizeof(args.v) / sizeof(args.v.channels),
 493                 .v.channels.mthd = NV_DEVICE_FIFO_CHANNELS,
 494         };
 495         struct nvif_object *device = &drm->client.device.object;
 496         int ret;
 497
 498         ret = nvif_object_mthd(device, NV_DEVICE_V0_INFO, &args, sizeof(args));
 499         if (ret || args.v.channels.mthd == NV_DEVICE_INFO_INVALID)
 500                 return -ENODEV;
 501
 502         drm->chan.nr = args.v.channels.data;
 503         drm->chan.context_base = dma_fence_context_alloc(drm->chan.nr);
 504         return 0;
 505 }