drivers/gpu/drm/nouveau/nvc0_fence.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 <core/object.h>
  26 #include <core/client.h>
  27 #include <core/class.h>
  28
  29 #include <engine/fifo.h>
  30
  31 #include "nouveau_drm.h"
  32 #include "nouveau_dma.h"
  33 #include "nouveau_fence.h"
  34
  35 struct nvc0_fence_priv {
  36         struct nouveau_fence_priv base;
  37         struct nouveau_bo *bo;
  38         u32 *suspend;
  39 };
  40
  41 struct nvc0_fence_chan {
  42         struct nouveau_fence_chan base;
  43         struct nouveau_vma vma;
  44         struct nouveau_vma dispc_vma[4];
  45 };
  46
  47 u64
  48 nvc0_fence_crtc(struct nouveau_channel *chan, int crtc)
  49 {
  50         struct nvc0_fence_chan *fctx = chan->fence;
  51         return fctx->dispc_vma[crtc].offset;
  52 }
  53
  54 static int
  55 nvc0_fence_emit(struct nouveau_fence *fence)
  56 {
  57         struct nouveau_channel *chan = fence->channel;
  58         struct nvc0_fence_chan *fctx = chan->fence;
  59         struct nouveau_fifo_chan *fifo = (void *)chan->object;
  60         u64 addr = fctx->vma.offset + fifo->chid * 16;
  61         int ret;
  62
  63         ret = RING_SPACE(chan, 5);
  64         if (ret == 0) {
  65                 BEGIN_NVC0(chan, 0, NV84_SUBCHAN_SEMAPHORE_ADDRESS_HIGH, 4);
  66                 OUT_RING  (chan, upper_32_bits(addr));
  67                 OUT_RING  (chan, lower_32_bits(addr));
  68                 OUT_RING  (chan, fence->sequence);
  69                 OUT_RING  (chan, NV84_SUBCHAN_SEMAPHORE_TRIGGER_WRITE_LONG);
  70                 FIRE_RING (chan);
  71         }
  72
  73         return ret;
  74 }
  75
  76 static int
  77 nvc0_fence_sync(struct nouveau_fence *fence,
  78                 struct nouveau_channel *prev, struct nouveau_channel *chan)
  79 {
  80         struct nvc0_fence_chan *fctx = chan->fence;
  81         struct nouveau_fifo_chan *fifo = (void *)prev->object;
  82         u64 addr = fctx->vma.offset + fifo->chid * 16;
  83         int ret;
  84
  85         ret = RING_SPACE(chan, 5);
  86         if (ret == 0) {
  87                 BEGIN_NVC0(chan, 0, NV84_SUBCHAN_SEMAPHORE_ADDRESS_HIGH, 4);
  88                 OUT_RING  (chan, upper_32_bits(addr));
  89                 OUT_RING  (chan, lower_32_bits(addr));
  90                 OUT_RING  (chan, fence->sequence);
  91                 OUT_RING  (chan, NV84_SUBCHAN_SEMAPHORE_TRIGGER_ACQUIRE_GEQUAL |
  92                                  NVC0_SUBCHAN_SEMAPHORE_TRIGGER_YIELD);
  93                 FIRE_RING (chan);
  94         }
  95
  96         return ret;
  97 }
  98
  99 static u32
 100 nvc0_fence_read(struct nouveau_channel *chan)
 101 {
 102         struct nouveau_fifo_chan *fifo = (void *)chan->object;
 103         struct nvc0_fence_priv *priv = chan->drm->fence;
 104         return nouveau_bo_rd32(priv->bo, fifo->chid * 16/4);
 105 }
 106
 107 static void
 108 nvc0_fence_context_del(struct nouveau_channel *chan)
 109 {
 110         struct drm_device *dev = chan->drm->dev;
 111         struct nvc0_fence_priv *priv = chan->drm->fence;
 112         struct nvc0_fence_chan *fctx = chan->fence;
 113         int i;
 114
 115         if (nv_device(chan->drm->device)->card_type >= NV_D0) {
 116                 for (i = 0; i < dev->mode_config.num_crtc; i++) {
 117                         struct nouveau_bo *bo = nvd0sema(dev, i);
 118                         nouveau_bo_vma_del(bo, &fctx->dispc_vma[i]);
 119                 }
 120         } else
 121         if (nv_device(chan->drm->device)->card_type >= NV_50) {
 122                 for (i = 0; i < dev->mode_config.num_crtc; i++) {
 123                         struct nouveau_bo *bo = nv50sema(dev, i);
 124                         nouveau_bo_vma_del(bo, &fctx->dispc_vma[i]);
 125                 }
 126         }
 127
 128         nouveau_bo_vma_del(priv->bo, &fctx->vma);
 129         nouveau_fence_context_del(&fctx->base);
 130         chan->fence = NULL;
 131         kfree(fctx);
 132 }
 133
 134 static int
 135 nvc0_fence_context_new(struct nouveau_channel *chan)
 136 {
 137         struct nouveau_fifo_chan *fifo = (void *)chan->object;
 138         struct nouveau_client *client = nouveau_client(fifo);
 139         struct nvc0_fence_priv *priv = chan->drm->fence;
 140         struct nvc0_fence_chan *fctx;
 141         int ret, i;
 142
 143         fctx = chan->fence = kzalloc(sizeof(*fctx), GFP_KERNEL);
 144         if (!fctx)
 145                 return -ENOMEM;
 146
 147         nouveau_fence_context_new(&fctx->base);
 148
 149         ret = nouveau_bo_vma_add(priv->bo, client->vm, &fctx->vma);
 150         if (ret)
 151                 nvc0_fence_context_del(chan);
 152
 153         /* map display semaphore buffers into channel's vm */
 154         for (i = 0; !ret && i < chan->drm->dev->mode_config.num_crtc; i++) {
 155                 struct nouveau_bo *bo;
 156                 if (nv_device(chan->drm->device)->card_type >= NV_D0)
 157                         bo = nvd0sema(chan->drm->dev, i);
 158                 else
 159                         bo = nv50sema(chan->drm->dev, i);
 160
 161                 ret = nouveau_bo_vma_add(bo, client->vm, &fctx->dispc_vma[i]);
 162         }
 163
 164         nouveau_bo_wr32(priv->bo, fifo->chid * 16/4, 0x00000000);
 165         return ret;
 166 }
 167
 168 static bool
 169 nvc0_fence_suspend(struct nouveau_drm *drm)
 170 {
 171         struct nouveau_fifo *pfifo = nouveau_fifo(drm->device);
 172         struct nvc0_fence_priv *priv = drm->fence;
 173         int i;
 174
 175         priv->suspend = vmalloc((pfifo->max + 1) * sizeof(u32));
 176         if (priv->suspend) {
 177                 for (i = 0; i <= pfifo->max; i++)
 178                         priv->suspend[i] = nouveau_bo_rd32(priv->bo, i);
 179         }
 180
 181         return priv->suspend != NULL;
 182 }
 183
 184 static void
 185 nvc0_fence_resume(struct nouveau_drm *drm)
 186 {
 187         struct nouveau_fifo *pfifo = nouveau_fifo(drm->device);
 188         struct nvc0_fence_priv *priv = drm->fence;
 189         int i;
 190
 191         if (priv->suspend) {
 192                 for (i = 0; i <= pfifo->max; i++)
 193                         nouveau_bo_wr32(priv->bo, i, priv->suspend[i]);
 194                 vfree(priv->suspend);
 195                 priv->suspend = NULL;
 196         }
 197 }
 198
 199 static void
 200 nvc0_fence_destroy(struct nouveau_drm *drm)
 201 {
 202         struct nvc0_fence_priv *priv = drm->fence;
 203         nouveau_bo_unmap(priv->bo);
 204         nouveau_bo_ref(NULL, &priv->bo);
 205         drm->fence = NULL;
 206         kfree(priv);
 207 }
 208
 209 int
 210 nvc0_fence_create(struct nouveau_drm *drm)
 211 {
 212         struct nouveau_fifo *pfifo = nouveau_fifo(drm->device);
 213         struct nvc0_fence_priv *priv;
 214         int ret;
 215
 216         priv = drm->fence = kzalloc(sizeof(*priv), GFP_KERNEL);
 217         if (!priv)
 218                 return -ENOMEM;
 219
 220         priv->base.dtor = nvc0_fence_destroy;
 221         priv->base.suspend = nvc0_fence_suspend;
 222         priv->base.resume = nvc0_fence_resume;
 223         priv->base.context_new = nvc0_fence_context_new;
 224         priv->base.context_del = nvc0_fence_context_del;
 225         priv->base.emit = nvc0_fence_emit;
 226         priv->base.sync = nvc0_fence_sync;
 227         priv->base.read = nvc0_fence_read;
 228
 229         ret = nouveau_bo_new(drm->dev, 16 * (pfifo->max + 1), 0,
 230                              TTM_PL_FLAG_VRAM, 0, 0, NULL, &priv->bo);
 231         if (ret == 0) {
 232                 ret = nouveau_bo_pin(priv->bo, TTM_PL_FLAG_VRAM);
 233                 if (ret == 0)
 234                         ret = nouveau_bo_map(priv->bo);
 235                 if (ret)
 236                         nouveau_bo_ref(NULL, &priv->bo);
 237         }
 238
 239         if (ret)
 240                 nvc0_fence_destroy(drm);
 241         return ret;
 242 }