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 <drm/drmP.h>
  26 #include "nouveau_drv.h"
  27 #include <drm/nouveau_drm.h>
  28 #include "nouveau_dma.h"
  29 #include "nouveau_fifo.h"
  30 #include "nouveau_ramht.h"
  31 #include "nouveau_fence.h"
  32 #include "nouveau_software.h"
  33
  34 static int
  35 nouveau_channel_pushbuf_init(struct nouveau_channel *chan)
  36 {
  37         u32 mem = nouveau_vram_pushbuf ? TTM_PL_FLAG_VRAM : TTM_PL_FLAG_TT;
  38         struct drm_device *dev = chan->dev;
  39         struct drm_nouveau_private *dev_priv = dev->dev_private;
  40         int ret;
  41
  42         /* allocate buffer object */
  43         ret = nouveau_bo_new(dev, 65536, 0, mem, 0, 0, NULL, &chan->pushbuf_bo);
  44         if (ret)
  45                 goto out;
  46
  47         ret = nouveau_bo_pin(chan->pushbuf_bo, mem);
  48         if (ret)
  49                 goto out;
  50
  51         ret = nouveau_bo_map(chan->pushbuf_bo);
  52         if (ret)
  53                 goto out;
  54
  55         /* create DMA object covering the entire memtype where the push
  56          * buffer resides, userspace can submit its own push buffers from
  57          * anywhere within the same memtype.
  58          */
  59         chan->pushbuf_base = chan->pushbuf_bo->bo.offset;
  60         if (dev_priv->card_type >= NV_50) {
  61                 ret = nouveau_bo_vma_add(chan->pushbuf_bo, chan->vm,
  62                                          &chan->pushbuf_vma);
  63                 if (ret)
  64                         goto out;
  65
  66                 if (dev_priv->card_type < NV_C0) {
  67                         ret = nouveau_gpuobj_dma_new(chan,
  68                                                      NV_CLASS_DMA_IN_MEMORY, 0,
  69                                                      (1ULL << 40),
  70                                                      NV_MEM_ACCESS_RO,
  71                                                      NV_MEM_TARGET_VM,
  72                                                      &chan->pushbuf);
  73                 }
  74                 chan->pushbuf_base = chan->pushbuf_vma.offset;
  75         } else
  76         if (chan->pushbuf_bo->bo.mem.mem_type == TTM_PL_TT) {
  77                 ret = nouveau_gpuobj_dma_new(chan, NV_CLASS_DMA_IN_MEMORY, 0,
  78                                              dev_priv->gart_info.aper_size,
  79                                              NV_MEM_ACCESS_RO,
  80                                              NV_MEM_TARGET_GART,
  81                                              &chan->pushbuf);
  82         } else
  83         if (dev_priv->card_type != NV_04) {
  84                 ret = nouveau_gpuobj_dma_new(chan, NV_CLASS_DMA_IN_MEMORY, 0,
  85                                              dev_priv->fb_available_size,
  86                                              NV_MEM_ACCESS_RO,
  87                                              NV_MEM_TARGET_VRAM,
  88                                              &chan->pushbuf);
  89         } else {
  90                 /* NV04 cmdbuf hack, from original ddx.. not sure of it's
  91                  * exact reason for existing :)  PCI access to cmdbuf in
  92                  * VRAM.
  93                  */
  94                 ret = nouveau_gpuobj_dma_new(chan, NV_CLASS_DMA_IN_MEMORY,
  95                                              pci_resource_start(dev->pdev, 1),
  96                                              dev_priv->fb_available_size,
  97                                              NV_MEM_ACCESS_RO,
  98                                              NV_MEM_TARGET_PCI,
  99                                              &chan->pushbuf);
 100         }
 101
 102 out:
 103         if (ret) {
 104                 NV_ERROR(dev, "error initialising pushbuf: %d\n", ret);
 105                 nouveau_bo_vma_del(chan->pushbuf_bo, &chan->pushbuf_vma);
 106                 nouveau_gpuobj_ref(NULL, &chan->pushbuf);
 107                 if (chan->pushbuf_bo) {
 108                         nouveau_bo_unmap(chan->pushbuf_bo);
 109                         nouveau_bo_ref(NULL, &chan->pushbuf_bo);
 110                 }
 111         }
 112
 113         return 0;
 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 nouveau_exec_engine *fence = nv_engine(dev, NVOBJ_ENGINE_FENCE);
 123         struct nouveau_fifo_priv *pfifo = nv_engine(dev, NVOBJ_ENGINE_FIFO);
 124         struct drm_nouveau_private *dev_priv = dev->dev_private;
 125         struct nouveau_fpriv *fpriv = nouveau_fpriv(file_priv);
 126         struct nouveau_channel *chan;
 127         unsigned long flags;
 128         int ret, i;
 129
 130         /* allocate and lock channel structure */
 131         chan = kzalloc(sizeof(*chan), GFP_KERNEL);
 132         if (!chan)
 133                 return -ENOMEM;
 134         chan->dev = dev;
 135         chan->file_priv = file_priv;
 136         chan->vram_handle = vram_handle;
 137         chan->gart_handle = gart_handle;
 138
 139         kref_init(&chan->ref);
 140         atomic_set(&chan->users, 1);
 141         mutex_init(&chan->mutex);
 142         mutex_lock(&chan->mutex);
 143
 144         /* allocate hw channel id */
 145         spin_lock_irqsave(&dev_priv->channels.lock, flags);
 146         for (chan->id = 0; chan->id < pfifo->channels; chan->id++) {
 147                 if (!dev_priv->channels.ptr[chan->id]) {
 148                         nouveau_channel_ref(chan, &dev_priv->channels.ptr[chan->id]);
 149                         break;
 150                 }
 151         }
 152         spin_unlock_irqrestore(&dev_priv->channels.lock, flags);
 153
 154         if (chan->id == pfifo->channels) {
 155                 mutex_unlock(&chan->mutex);
 156                 kfree(chan);
 157                 return -ENODEV;
 158         }
 159
 160         NV_DEBUG(dev, "initialising channel %d\n", chan->id);
 161
 162         /* setup channel's memory and vm */
 163         ret = nouveau_gpuobj_channel_init(chan, vram_handle, gart_handle);
 164         if (ret) {
 165                 NV_ERROR(dev, "gpuobj %d\n", ret);
 166                 nouveau_channel_put(&chan);
 167                 return ret;
 168         }
 169
 170         /* Allocate space for per-channel fixed notifier memory */
 171         ret = nouveau_notifier_init_channel(chan);
 172         if (ret) {
 173                 NV_ERROR(dev, "ntfy %d\n", ret);
 174                 nouveau_channel_put(&chan);
 175                 return ret;
 176         }
 177
 178         /* Allocate DMA push buffer */
 179         ret = nouveau_channel_pushbuf_init(chan);
 180         if (ret) {
 181                 NV_ERROR(dev, "pushbuf %d\n", ret);
 182                 nouveau_channel_put(&chan);
 183                 return ret;
 184         }
 185
 186         nouveau_dma_init(chan);
 187         chan->user_put = 0x40;
 188         chan->user_get = 0x44;
 189         if (dev_priv->card_type >= NV_50)
 190                 chan->user_get_hi = 0x60;
 191
 192         /* create fifo context */
 193         ret = pfifo->base.context_new(chan, NVOBJ_ENGINE_FIFO);
 194         if (ret) {
 195                 nouveau_channel_put(&chan);
 196                 return ret;
 197         }
 198
 199         /* Insert NOPs for NOUVEAU_DMA_SKIPS */
 200         ret = RING_SPACE(chan, NOUVEAU_DMA_SKIPS);
 201         if (ret) {
 202                 nouveau_channel_put(&chan);
 203                 return ret;
 204         }
 205
 206         for (i = 0; i < NOUVEAU_DMA_SKIPS; i++)
 207                 OUT_RING  (chan, 0x00000000);
 208
 209         ret = nouveau_gpuobj_gr_new(chan, NvSw, nouveau_software_class(dev));
 210         if (ret) {
 211                 nouveau_channel_put(&chan);
 212                 return ret;
 213         }
 214
 215         if (dev_priv->card_type < NV_C0) {
 216                 ret = RING_SPACE(chan, 2);
 217                 if (ret) {
 218                         nouveau_channel_put(&chan);
 219                         return ret;
 220                 }
 221
 222                 BEGIN_NV04(chan, NvSubSw, NV01_SUBCHAN_OBJECT, 1);
 223                 OUT_RING  (chan, NvSw);
 224                 FIRE_RING (chan);
 225         }
 226
 227         FIRE_RING(chan);
 228
 229         ret = fence->context_new(chan, NVOBJ_ENGINE_FENCE);
 230         if (ret) {
 231                 nouveau_channel_put(&chan);
 232                 return ret;
 233         }
 234
 235         nouveau_debugfs_channel_init(chan);
 236
 237         NV_DEBUG(dev, "channel %d initialised\n", chan->id);
 238         if (fpriv) {
 239                 spin_lock(&fpriv->lock);
 240                 list_add(&chan->list, &fpriv->channels);
 241                 spin_unlock(&fpriv->lock);
 242         }
 243         *chan_ret = chan;
 244         return 0;
 245 }
 246
 247 struct nouveau_channel *
 248 nouveau_channel_get_unlocked(struct nouveau_channel *ref)
 249 {
 250         struct nouveau_channel *chan = NULL;
 251
 252         if (likely(ref && atomic_inc_not_zero(&ref->users)))
 253                 nouveau_channel_ref(ref, &chan);
 254
 255         return chan;
 256 }
 257
 258 struct nouveau_channel *
 259 nouveau_channel_get(struct drm_file *file_priv, int id)
 260 {
 261         struct nouveau_fpriv *fpriv = nouveau_fpriv(file_priv);
 262         struct nouveau_channel *chan;
 263
 264         spin_lock(&fpriv->lock);
 265         list_for_each_entry(chan, &fpriv->channels, list) {
 266                 if (chan->id == id) {
 267                         chan = nouveau_channel_get_unlocked(chan);
 268                         spin_unlock(&fpriv->lock);
 269                         mutex_lock(&chan->mutex);
 270                         return chan;
 271                 }
 272         }
 273         spin_unlock(&fpriv->lock);
 274
 275         return ERR_PTR(-EINVAL);
 276 }
 277
 278 void
 279 nouveau_channel_put_unlocked(struct nouveau_channel **pchan)
 280 {
 281         struct nouveau_channel *chan = *pchan;
 282         struct drm_device *dev = chan->dev;
 283         struct drm_nouveau_private *dev_priv = dev->dev_private;
 284         unsigned long flags;
 285         int i;
 286
 287         /* decrement the refcount, and we're done if there's still refs */
 288         if (likely(!atomic_dec_and_test(&chan->users))) {
 289                 nouveau_channel_ref(NULL, pchan);
 290                 return;
 291         }
 292
 293         /* no one wants the channel anymore */
 294         NV_DEBUG(dev, "freeing channel %d\n", chan->id);
 295         nouveau_debugfs_channel_fini(chan);
 296
 297         /* give it chance to idle */
 298         nouveau_channel_idle(chan);
 299
 300         /* destroy the engine specific contexts */
 301         for (i = NVOBJ_ENGINE_NR - 1; i >= 0; i--) {
 302                 if (chan->engctx[i])
 303                         dev_priv->eng[i]->context_del(chan, i);
 304         }
 305
 306         /* aside from its resources, the channel should now be dead,
 307          * remove it from the channel list
 308          */
 309         spin_lock_irqsave(&dev_priv->channels.lock, flags);
 310         nouveau_channel_ref(NULL, &dev_priv->channels.ptr[chan->id]);
 311         spin_unlock_irqrestore(&dev_priv->channels.lock, flags);
 312
 313         /* destroy any resources the channel owned */
 314         nouveau_gpuobj_ref(NULL, &chan->pushbuf);
 315         if (chan->pushbuf_bo) {
 316                 nouveau_bo_vma_del(chan->pushbuf_bo, &chan->pushbuf_vma);
 317                 nouveau_bo_unmap(chan->pushbuf_bo);
 318                 nouveau_bo_unpin(chan->pushbuf_bo);
 319                 nouveau_bo_ref(NULL, &chan->pushbuf_bo);
 320         }
 321         nouveau_ramht_ref(NULL, &chan->ramht, chan);
 322         nouveau_notifier_takedown_channel(chan);
 323         nouveau_gpuobj_channel_takedown(chan);
 324
 325         nouveau_channel_ref(NULL, pchan);
 326 }
 327
 328 void
 329 nouveau_channel_put(struct nouveau_channel **pchan)
 330 {
 331         mutex_unlock(&(*pchan)->mutex);
 332         nouveau_channel_put_unlocked(pchan);
 333 }
 334
 335 static void
 336 nouveau_channel_del(struct kref *ref)
 337 {
 338         struct nouveau_channel *chan =
 339                 container_of(ref, struct nouveau_channel, ref);
 340
 341         kfree(chan);
 342 }
 343
 344 void
 345 nouveau_channel_ref(struct nouveau_channel *chan,
 346                     struct nouveau_channel **pchan)
 347 {
 348         if (chan)
 349                 kref_get(&chan->ref);
 350
 351         if (*pchan)
 352                 kref_put(&(*pchan)->ref, nouveau_channel_del);
 353
 354         *pchan = chan;
 355 }
 356
 357 int
 358 nouveau_channel_idle(struct nouveau_channel *chan)
 359 {
 360         struct drm_device *dev = chan->dev;
 361         struct nouveau_fence *fence = NULL;
 362         int ret;
 363
 364         ret = nouveau_fence_new(chan, &fence);
 365         if (!ret) {
 366                 ret = nouveau_fence_wait(fence, false, false);
 367                 nouveau_fence_unref(&fence);
 368         }
 369
 370         if (ret)
 371                 NV_ERROR(dev, "Failed to idle channel %d.\n", chan->id);
 372         return ret;
 373 }
 374
 375 /* cleans up all the fifos from file_priv */
 376 void
 377 nouveau_channel_cleanup(struct drm_device *dev, struct drm_file *file_priv)
 378 {
 379         struct nouveau_fifo_priv *pfifo = nv_engine(dev, NVOBJ_ENGINE_FIFO);
 380         struct nouveau_channel *chan;
 381         int i;
 382
 383         if (!pfifo)
 384                 return;
 385
 386         NV_DEBUG(dev, "clearing FIFO enables from file_priv\n");
 387         for (i = 0; i < pfifo->channels; i++) {
 388                 chan = nouveau_channel_get(file_priv, i);
 389                 if (IS_ERR(chan))
 390                         continue;
 391
 392                 list_del(&chan->list);
 393                 atomic_dec(&chan->users);
 394                 nouveau_channel_put(&chan);
 395         }
 396 }