drivers/gpu/drm/nouveau/nouveau_channel.c

   1 /*
   2  * Copyright 2005-2006 Stephane Marchesin
   3  * All Rights Reserved.
   4  *
   5  * Permission is hereby granted, free of charge, to any person obtaining a
   6  * copy of this software and associated documentation files (the "Software"),
   7  * to deal in the Software without restriction, including without limitation
   8  * the rights to use, copy, modify, merge, publish, distribute, sublicense,
   9  * and/or sell copies of the Software, and to permit persons to whom the
  10  * Software is furnished to do so, subject to the following conditions:
  11  *
  12  * The above copyright notice and this permission notice (including the next
  13  * paragraph) shall be included in all copies or substantial portions of the
  14  * Software.
  15  *
  16  * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
  17  * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
  18  * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.  IN NO EVENT SHALL
  19  * PRECISION INSIGHT AND/OR ITS SUPPLIERS BE LIABLE FOR ANY CLAIM, DAMAGES OR
  20  * OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE,
  21  * ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER
  22  * DEALINGS IN THE SOFTWARE.
  23  */
  24
  25 #include "drmP.h"
  26 #include "drm.h"
  27 #include "nouveau_drv.h"
  28 #include "nouveau_drm.h"
  29 #include "nouveau_dma.h"
  30
  31 static int
  32 nouveau_channel_pushbuf_ctxdma_init(struct nouveau_channel *chan)
  33 {
  34         struct drm_device *dev = chan->dev;
  35         struct drm_nouveau_private *dev_priv = dev->dev_private;
  36         struct nouveau_bo *pb = chan->pushbuf_bo;
  37         struct nouveau_gpuobj *pushbuf = NULL;
  38         int ret = 0;
  39
  40         if (dev_priv->card_type >= NV_50) {
  41                 if (dev_priv->card_type < NV_C0) {
  42                         ret = nouveau_gpuobj_dma_new(chan,
  43                                                      NV_CLASS_DMA_IN_MEMORY, 0,
  44                                                      (1ULL << 40),
  45                                                      NV_MEM_ACCESS_RO,
  46                                                      NV_MEM_TARGET_VM,
  47                                                      &pushbuf);
  48                 }
  49                 chan->pushbuf_base = pb->bo.offset;
  50         } else
  51         if (pb->bo.mem.mem_type == TTM_PL_TT) {
  52                 ret = nouveau_gpuobj_dma_new(chan, NV_CLASS_DMA_IN_MEMORY, 0,
  53                                              dev_priv->gart_info.aper_size,
  54                                              NV_MEM_ACCESS_RO,
  55                                              NV_MEM_TARGET_GART, &pushbuf);
  56                 chan->pushbuf_base = pb->bo.mem.start << PAGE_SHIFT;
  57         } else
  58         if (dev_priv->card_type != NV_04) {
  59                 ret = nouveau_gpuobj_dma_new(chan, NV_CLASS_DMA_IN_MEMORY, 0,
  60                                              dev_priv->fb_available_size,
  61                                              NV_MEM_ACCESS_RO,
  62                                              NV_MEM_TARGET_VRAM, &pushbuf);
  63                 chan->pushbuf_base = pb->bo.mem.start << PAGE_SHIFT;
  64         } else {
  65                 /* NV04 cmdbuf hack, from original ddx.. not sure of it's
  66                  * exact reason for existing :)  PCI access to cmdbuf in
  67                  * VRAM.
  68                  */
  69                 ret = nouveau_gpuobj_dma_new(chan, NV_CLASS_DMA_IN_MEMORY,
  70                                              pci_resource_start(dev->pdev, 1),
  71                                              dev_priv->fb_available_size,
  72                                              NV_MEM_ACCESS_RO,
  73                                              NV_MEM_TARGET_PCI, &pushbuf);
  74                 chan->pushbuf_base = pb->bo.mem.start << PAGE_SHIFT;
  75         }
  76
  77         nouveau_gpuobj_ref(pushbuf, &chan->pushbuf);
  78         nouveau_gpuobj_ref(NULL, &pushbuf);
  79         return ret;
  80 }
  81
  82 static struct nouveau_bo *
  83 nouveau_channel_user_pushbuf_alloc(struct drm_device *dev)
  84 {
  85         struct nouveau_bo *pushbuf = NULL;
  86         int location, ret;
  87
  88         if (nouveau_vram_pushbuf)
  89                 location = TTM_PL_FLAG_VRAM;
  90         else
  91                 location = TTM_PL_FLAG_TT;
  92
  93         ret = nouveau_bo_new(dev, NULL, 65536, 0, location, 0, 0x0000, &pushbuf);
  94         if (ret) {
  95                 NV_ERROR(dev, "error allocating DMA push buffer: %d\n", ret);
  96                 return NULL;
  97         }
  98
  99         ret = nouveau_bo_pin(pushbuf, location);
 100         if (ret) {
 101                 NV_ERROR(dev, "error pinning DMA push buffer: %d\n", ret);
 102                 nouveau_bo_ref(NULL, &pushbuf);
 103                 return NULL;
 104         }
 105
 106         ret = nouveau_bo_map(pushbuf);
 107         if (ret) {
 108                 nouveau_bo_unpin(pushbuf);
 109                 nouveau_bo_ref(NULL, &pushbuf);
 110                 return NULL;
 111         }
 112
 113         return pushbuf;
 114 }
 115
 116 /* allocates and initializes a fifo for user space consumption */
 117 int
 118 nouveau_channel_alloc(struct drm_device *dev, struct nouveau_channel **chan_ret,
 119                       struct drm_file *file_priv,
 120                       uint32_t vram_handle, uint32_t gart_handle)
 121 {
 122         struct drm_nouveau_private *dev_priv = dev->dev_private;
 123         struct nouveau_fifo_engine *pfifo = &dev_priv->engine.fifo;
 124         struct nouveau_channel *chan;
 125         unsigned long flags;
 126         int ret;
 127
 128         /* allocate and lock channel structure */
 129         chan = kzalloc(sizeof(*chan), GFP_KERNEL);
 130         if (!chan)
 131                 return -ENOMEM;
 132         chan->dev = dev;
 133         chan->file_priv = file_priv;
 134         chan->vram_handle = vram_handle;
 135         chan->gart_handle = gart_handle;
 136
 137         kref_init(&chan->ref);
 138         atomic_set(&chan->users, 1);
 139         mutex_init(&chan->mutex);
 140         mutex_lock(&chan->mutex);
 141
 142         /* allocate hw channel id */
 143         spin_lock_irqsave(&dev_priv->channels.lock, flags);
 144         for (chan->id = 0; chan->id < pfifo->channels; chan->id++) {
 145                 if (!dev_priv->channels.ptr[chan->id]) {
 146                         nouveau_channel_ref(chan, &dev_priv->channels.ptr[chan->id]);
 147                         break;
 148                 }
 149         }
 150         spin_unlock_irqrestore(&dev_priv->channels.lock, flags);
 151
 152         if (chan->id == pfifo->channels) {
 153                 mutex_unlock(&chan->mutex);
 154                 kfree(chan);
 155                 return -ENODEV;
 156         }
 157
 158         NV_DEBUG(dev, "initialising channel %d\n", chan->id);
 159         INIT_LIST_HEAD(&chan->nvsw.vbl_wait);
 160         INIT_LIST_HEAD(&chan->nvsw.flip);
 161         INIT_LIST_HEAD(&chan->fence.pending);
 162
 163         /* Allocate DMA push buffer */
 164         chan->pushbuf_bo = nouveau_channel_user_pushbuf_alloc(dev);
 165         if (!chan->pushbuf_bo) {
 166                 ret = -ENOMEM;
 167                 NV_ERROR(dev, "pushbuf %d\n", ret);
 168                 nouveau_channel_put(&chan);
 169                 return ret;
 170         }
 171
 172         nouveau_dma_pre_init(chan);
 173         chan->user_put = 0x40;
 174         chan->user_get = 0x44;
 175
 176         /* Allocate space for per-channel fixed notifier memory */
 177         ret = nouveau_notifier_init_channel(chan);
 178         if (ret) {
 179                 NV_ERROR(dev, "ntfy %d\n", ret);
 180                 nouveau_channel_put(&chan);
 181                 return ret;
 182         }
 183
 184         /* Setup channel's default objects */
 185         ret = nouveau_gpuobj_channel_init(chan, vram_handle, gart_handle);
 186         if (ret) {
 187                 NV_ERROR(dev, "gpuobj %d\n", ret);
 188                 nouveau_channel_put(&chan);
 189                 return ret;
 190         }
 191
 192         /* Create a dma object for the push buffer */
 193         ret = nouveau_channel_pushbuf_ctxdma_init(chan);
 194         if (ret) {
 195                 NV_ERROR(dev, "pbctxdma %d\n", ret);
 196                 nouveau_channel_put(&chan);
 197                 return ret;
 198         }
 199
 200         /* disable the fifo caches */
 201         pfifo->reassign(dev, false);
 202
 203         /* Construct inital RAMFC for new channel */
 204         ret = pfifo->create_context(chan);
 205         if (ret) {
 206                 nouveau_channel_put(&chan);
 207                 return ret;
 208         }
 209
 210         pfifo->reassign(dev, true);
 211
 212         ret = nouveau_dma_init(chan);
 213         if (!ret)
 214                 ret = nouveau_fence_channel_init(chan);
 215         if (ret) {
 216                 nouveau_channel_put(&chan);
 217                 return ret;
 218         }
 219
 220         nouveau_debugfs_channel_init(chan);
 221
 222         NV_DEBUG(dev, "channel %d initialised\n", chan->id);
 223         *chan_ret = chan;
 224         return 0;
 225 }
 226
 227 struct nouveau_channel *
 228 nouveau_channel_get_unlocked(struct nouveau_channel *ref)
 229 {
 230         struct nouveau_channel *chan = NULL;
 231
 232         if (likely(ref && atomic_inc_not_zero(&ref->users)))
 233                 nouveau_channel_ref(ref, &chan);
 234
 235         return chan;
 236 }
 237
 238 struct nouveau_channel *
 239 nouveau_channel_get(struct drm_device *dev, struct drm_file *file_priv, int id)
 240 {
 241         struct drm_nouveau_private *dev_priv = dev->dev_private;
 242         struct nouveau_channel *chan;
 243         unsigned long flags;
 244
 245         if (unlikely(id < 0 || id >= NOUVEAU_MAX_CHANNEL_NR))
 246                 return ERR_PTR(-EINVAL);
 247
 248         spin_lock_irqsave(&dev_priv->channels.lock, flags);
 249         chan = nouveau_channel_get_unlocked(dev_priv->channels.ptr[id]);
 250         spin_unlock_irqrestore(&dev_priv->channels.lock, flags);
 251
 252         if (unlikely(!chan))
 253                 return ERR_PTR(-EINVAL);
 254
 255         if (unlikely(file_priv && chan->file_priv != file_priv)) {
 256                 nouveau_channel_put_unlocked(&chan);
 257                 return ERR_PTR(-EINVAL);
 258         }
 259
 260         mutex_lock(&chan->mutex);
 261         return chan;
 262 }
 263
 264 void
 265 nouveau_channel_put_unlocked(struct nouveau_channel **pchan)
 266 {
 267         struct nouveau_channel *chan = *pchan;
 268         struct drm_device *dev = chan->dev;
 269         struct drm_nouveau_private *dev_priv = dev->dev_private;
 270         struct nouveau_fifo_engine *pfifo = &dev_priv->engine.fifo;
 271         struct nouveau_pgraph_engine *pgraph = &dev_priv->engine.graph;
 272         struct nouveau_crypt_engine *pcrypt = &dev_priv->engine.crypt;
 273         unsigned long flags;
 274
 275         /* decrement the refcount, and we're done if there's still refs */
 276         if (likely(!atomic_dec_and_test(&chan->users))) {
 277                 nouveau_channel_ref(NULL, pchan);
 278                 return;
 279         }
 280
 281         /* noone wants the channel anymore */
 282         NV_DEBUG(dev, "freeing channel %d\n", chan->id);
 283         nouveau_debugfs_channel_fini(chan);
 284
 285         /* give it chance to idle */
 286         nouveau_channel_idle(chan);
 287
 288         /* ensure all outstanding fences are signaled.  they should be if the
 289          * above attempts at idling were OK, but if we failed this'll tell TTM
 290          * we're done with the buffers.
 291          */
 292         nouveau_fence_channel_fini(chan);
 293
 294         /* boot it off the hardware */
 295         pfifo->reassign(dev, false);
 296
 297         /* We want to give pgraph a chance to idle and get rid of all
 298          * potential errors. We need to do this without the context
 299          * switch lock held, otherwise the irq handler is unable to
 300          * process them.
 301          */
 302         if (pgraph->channel(dev) == chan)
 303                 nouveau_wait_for_idle(dev);
 304
 305         /* destroy the engine specific contexts */
 306         pfifo->destroy_context(chan);
 307         pgraph->destroy_context(chan);
 308         if (pcrypt->destroy_context)
 309                 pcrypt->destroy_context(chan);
 310
 311         pfifo->reassign(dev, true);
 312
 313         /* aside from its resources, the channel should now be dead,
 314          * remove it from the channel list
 315          */
 316         spin_lock_irqsave(&dev_priv->channels.lock, flags);
 317         nouveau_channel_ref(NULL, &dev_priv->channels.ptr[chan->id]);
 318         spin_unlock_irqrestore(&dev_priv->channels.lock, flags);
 319
 320         /* destroy any resources the channel owned */
 321         nouveau_gpuobj_ref(NULL, &chan->pushbuf);
 322         if (chan->pushbuf_bo) {
 323                 nouveau_bo_unmap(chan->pushbuf_bo);
 324                 nouveau_bo_unpin(chan->pushbuf_bo);
 325                 nouveau_bo_ref(NULL, &chan->pushbuf_bo);
 326         }
 327         nouveau_gpuobj_channel_takedown(chan);
 328         nouveau_notifier_takedown_channel(chan);
 329
 330         nouveau_channel_ref(NULL, pchan);
 331 }
 332
 333 void
 334 nouveau_channel_put(struct nouveau_channel **pchan)
 335 {
 336         mutex_unlock(&(*pchan)->mutex);
 337         nouveau_channel_put_unlocked(pchan);
 338 }
 339
 340 static void
 341 nouveau_channel_del(struct kref *ref)
 342 {
 343         struct nouveau_channel *chan =
 344                 container_of(ref, struct nouveau_channel, ref);
 345
 346         kfree(chan);
 347 }
 348
 349 void
 350 nouveau_channel_ref(struct nouveau_channel *chan,
 351                     struct nouveau_channel **pchan)
 352 {
 353         if (chan)
 354                 kref_get(&chan->ref);
 355
 356         if (*pchan)
 357                 kref_put(&(*pchan)->ref, nouveau_channel_del);
 358
 359         *pchan = chan;
 360 }
 361
 362 void
 363 nouveau_channel_idle(struct nouveau_channel *chan)
 364 {
 365         struct drm_device *dev = chan->dev;
 366         struct nouveau_fence *fence = NULL;
 367         int ret;
 368
 369         nouveau_fence_update(chan);
 370
 371         if (chan->fence.sequence != chan->fence.sequence_ack) {
 372                 ret = nouveau_fence_new(chan, &fence, true);
 373                 if (!ret) {
 374                         ret = nouveau_fence_wait(fence, false, false);
 375                         nouveau_fence_unref(&fence);
 376                 }
 377
 378                 if (ret)
 379                         NV_ERROR(dev, "Failed to idle channel %d.\n", chan->id);
 380         }
 381 }
 382
 383 /* cleans up all the fifos from file_priv */
 384 void
 385 nouveau_channel_cleanup(struct drm_device *dev, struct drm_file *file_priv)
 386 {
 387         struct drm_nouveau_private *dev_priv = dev->dev_private;
 388         struct nouveau_engine *engine = &dev_priv->engine;
 389         struct nouveau_channel *chan;
 390         int i;
 391
 392         NV_DEBUG(dev, "clearing FIFO enables from file_priv\n");
 393         for (i = 0; i < engine->fifo.channels; i++) {
 394                 chan = nouveau_channel_get(dev, file_priv, i);
 395                 if (IS_ERR(chan))
 396                         continue;
 397
 398                 atomic_dec(&chan->users);
 399                 nouveau_channel_put(&chan);
 400         }
 401 }
 402
 403
 404 /***********************************
 405  * ioctls wrapping the functions
 406  ***********************************/
 407
 408 static int
 409 nouveau_ioctl_fifo_alloc(struct drm_device *dev, void *data,
 410                          struct drm_file *file_priv)
 411 {
 412         struct drm_nouveau_private *dev_priv = dev->dev_private;
 413         struct drm_nouveau_channel_alloc *init = data;
 414         struct nouveau_channel *chan;
 415         int ret;
 416
 417         if (dev_priv->engine.graph.accel_blocked)
 418                 return -ENODEV;
 419
 420         if (init->fb_ctxdma_handle == ~0 || init->tt_ctxdma_handle == ~0)
 421                 return -EINVAL;
 422
 423         ret = nouveau_channel_alloc(dev, &chan, file_priv,
 424                                     init->fb_ctxdma_handle,
 425                                     init->tt_ctxdma_handle);
 426         if (ret)
 427                 return ret;
 428         init->channel  = chan->id;
 429
 430         if (chan->dma.ib_max)
 431                 init->pushbuf_domains = NOUVEAU_GEM_DOMAIN_VRAM |
 432                                         NOUVEAU_GEM_DOMAIN_GART;
 433         else if (chan->pushbuf_bo->bo.mem.mem_type == TTM_PL_VRAM)
 434                 init->pushbuf_domains = NOUVEAU_GEM_DOMAIN_VRAM;
 435         else
 436                 init->pushbuf_domains = NOUVEAU_GEM_DOMAIN_GART;
 437
 438         if (dev_priv->card_type < NV_C0) {
 439                 init->subchan[0].handle = NvM2MF;
 440                 if (dev_priv->card_type < NV_50)
 441                         init->subchan[0].grclass = 0x0039;
 442                 else
 443                         init->subchan[0].grclass = 0x5039;
 444                 init->subchan[1].handle = NvSw;
 445                 init->subchan[1].grclass = NV_SW;
 446                 init->nr_subchan = 2;
 447         } else {
 448                 init->subchan[0].handle  = 0x9039;
 449                 init->subchan[0].grclass = 0x9039;
 450                 init->nr_subchan = 1;
 451         }
 452
 453         /* Named memory object area */
 454         ret = drm_gem_handle_create(file_priv, chan->notifier_bo->gem,
 455                                     &init->notifier_handle);
 456
 457         if (ret == 0)
 458                 atomic_inc(&chan->users); /* userspace reference */
 459         nouveau_channel_put(&chan);
 460         return ret;
 461 }
 462
 463 static int
 464 nouveau_ioctl_fifo_free(struct drm_device *dev, void *data,
 465                         struct drm_file *file_priv)
 466 {
 467         struct drm_nouveau_channel_free *req = data;
 468         struct nouveau_channel *chan;
 469
 470         chan = nouveau_channel_get(dev, file_priv, req->channel);
 471         if (IS_ERR(chan))
 472                 return PTR_ERR(chan);
 473
 474         atomic_dec(&chan->users);
 475         nouveau_channel_put(&chan);
 476         return 0;
 477 }
 478
 479 /***********************************
 480  * finally, the ioctl table
 481  ***********************************/
 482
 483 struct drm_ioctl_desc nouveau_ioctls[] = {
 484         DRM_IOCTL_DEF_DRV(NOUVEAU_GETPARAM, nouveau_ioctl_getparam, DRM_UNLOCKED|DRM_AUTH),
 485         DRM_IOCTL_DEF_DRV(NOUVEAU_SETPARAM, nouveau_ioctl_setparam, DRM_UNLOCKED|DRM_AUTH|DRM_MASTER|DRM_ROOT_ONLY),
 486         DRM_IOCTL_DEF_DRV(NOUVEAU_CHANNEL_ALLOC, nouveau_ioctl_fifo_alloc, DRM_UNLOCKED|DRM_AUTH),
 487         DRM_IOCTL_DEF_DRV(NOUVEAU_CHANNEL_FREE, nouveau_ioctl_fifo_free, DRM_UNLOCKED|DRM_AUTH),
 488         DRM_IOCTL_DEF_DRV(NOUVEAU_GROBJ_ALLOC, nouveau_ioctl_grobj_alloc, DRM_UNLOCKED|DRM_AUTH),
 489         DRM_IOCTL_DEF_DRV(NOUVEAU_NOTIFIEROBJ_ALLOC, nouveau_ioctl_notifier_alloc, DRM_UNLOCKED|DRM_AUTH),
 490         DRM_IOCTL_DEF_DRV(NOUVEAU_GPUOBJ_FREE, nouveau_ioctl_gpuobj_free, DRM_UNLOCKED|DRM_AUTH),
 491         DRM_IOCTL_DEF_DRV(NOUVEAU_GEM_NEW, nouveau_gem_ioctl_new, DRM_UNLOCKED|DRM_AUTH),
 492         DRM_IOCTL_DEF_DRV(NOUVEAU_GEM_PUSHBUF, nouveau_gem_ioctl_pushbuf, DRM_UNLOCKED|DRM_AUTH),
 493         DRM_IOCTL_DEF_DRV(NOUVEAU_GEM_CPU_PREP, nouveau_gem_ioctl_cpu_prep, DRM_UNLOCKED|DRM_AUTH),
 494         DRM_IOCTL_DEF_DRV(NOUVEAU_GEM_CPU_FINI, nouveau_gem_ioctl_cpu_fini, DRM_UNLOCKED|DRM_AUTH),
 495         DRM_IOCTL_DEF_DRV(NOUVEAU_GEM_INFO, nouveau_gem_ioctl_info, DRM_UNLOCKED|DRM_AUTH),
 496 };
 497
 498 int nouveau_max_ioctl = DRM_ARRAY_SIZE(nouveau_ioctls);