drivers/gpu/drm/nouveau/nv84_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 #include "nouveau_drv.h"
  25 #include "nouveau_dma.h"
  26 #include "nouveau_fence.h"
  27 #include "nouveau_vmm.h"
  28
  29 #include "nv50_display.h"
  30
  31 #include <nvif/push206e.h>
  32
  33 #include <nvhw/class/cl826f.h>
  34
  35 static int
  36 nv84_fence_emit32(struct nouveau_channel *chan, u64 virtual, u32 sequence)
  37 {
  38         struct nvif_push *push = chan->chan.push;
  39         int ret = PUSH_WAIT(push, 8);
  40         if (ret == 0) {
  41                 PUSH_MTHD(push, NV826F, SET_CONTEXT_DMA_SEMAPHORE, chan->vram.handle);
  42
  43                 PUSH_MTHD(push, NV826F, SEMAPHOREA,
  44                           NVVAL(NV826F, SEMAPHOREA, OFFSET_UPPER, upper_32_bits(virtual)),
  45
  46                                         SEMAPHOREB, lower_32_bits(virtual),
  47                                         SEMAPHOREC, sequence,
  48
  49                                         SEMAPHORED,
  50                           NVDEF(NV826F, SEMAPHORED, OPERATION, RELEASE),
  51
  52                                         NON_STALLED_INTERRUPT, 0);
  53                 PUSH_KICK(push);
  54         }
  55         return ret;
  56 }
  57
  58 static int
  59 nv84_fence_sync32(struct nouveau_channel *chan, u64 virtual, u32 sequence)
  60 {
  61         struct nvif_push *push = chan->chan.push;
  62         int ret = PUSH_WAIT(push, 7);
  63         if (ret == 0) {
  64                 PUSH_MTHD(push, NV826F, SET_CONTEXT_DMA_SEMAPHORE, chan->vram.handle);
  65
  66                 PUSH_MTHD(push, NV826F, SEMAPHOREA,
  67                           NVVAL(NV826F, SEMAPHOREA, OFFSET_UPPER, upper_32_bits(virtual)),
  68
  69                                         SEMAPHOREB, lower_32_bits(virtual),
  70                                         SEMAPHOREC, sequence,
  71
  72                                         SEMAPHORED,
  73                           NVDEF(NV826F, SEMAPHORED, OPERATION, ACQ_GEQ));
  74                 PUSH_KICK(push);
  75         }
  76         return ret;
  77 }
  78
  79 static int
  80 nv84_fence_emit(struct nouveau_fence *fence)
  81 {
  82         struct nouveau_channel *chan = fence->channel;
  83         struct nv84_fence_chan *fctx = chan->fence;
  84         u64 addr = fctx->vma->addr + chan->chid * 16;
  85
  86         return fctx->base.emit32(chan, addr, fence->base.seqno);
  87 }
  88
  89 static int
  90 nv84_fence_sync(struct nouveau_fence *fence,
  91                 struct nouveau_channel *prev, struct nouveau_channel *chan)
  92 {
  93         struct nv84_fence_chan *fctx = chan->fence;
  94         u64 addr = fctx->vma->addr + prev->chid * 16;
  95
  96         return fctx->base.sync32(chan, addr, fence->base.seqno);
  97 }
  98
  99 static u32
 100 nv84_fence_read(struct nouveau_channel *chan)
 101 {
 102         struct nv84_fence_priv *priv = chan->drm->fence;
 103         return nouveau_bo_rd32(priv->bo, chan->chid * 16/4);
 104 }
 105
 106 static void
 107 nv84_fence_context_del(struct nouveau_channel *chan)
 108 {
 109         struct nv84_fence_priv *priv = chan->drm->fence;
 110         struct nv84_fence_chan *fctx = chan->fence;
 111
 112         nouveau_bo_wr32(priv->bo, chan->chid * 16 / 4, fctx->base.sequence);
 113         mutex_lock(&priv->mutex);
 114         nouveau_vma_del(&fctx->vma);
 115         mutex_unlock(&priv->mutex);
 116         nouveau_fence_context_del(&fctx->base);
 117         chan->fence = NULL;
 118         nouveau_fence_context_free(&fctx->base);
 119 }
 120
 121 int
 122 nv84_fence_context_new(struct nouveau_channel *chan)
 123 {
 124         struct nv84_fence_priv *priv = chan->drm->fence;
 125         struct nv84_fence_chan *fctx;
 126         int ret;
 127
 128         fctx = chan->fence = kzalloc(sizeof(*fctx), GFP_KERNEL);
 129         if (!fctx)
 130                 return -ENOMEM;
 131
 132         nouveau_fence_context_new(chan, &fctx->base);
 133         fctx->base.emit = nv84_fence_emit;
 134         fctx->base.sync = nv84_fence_sync;
 135         fctx->base.read = nv84_fence_read;
 136         fctx->base.emit32 = nv84_fence_emit32;
 137         fctx->base.sync32 = nv84_fence_sync32;
 138         fctx->base.sequence = nv84_fence_read(chan);
 139
 140         mutex_lock(&priv->mutex);
 141         ret = nouveau_vma_new(priv->bo, chan->vmm, &fctx->vma);
 142         mutex_unlock(&priv->mutex);
 143
 144         if (ret)
 145                 nv84_fence_context_del(chan);
 146         return ret;
 147 }
 148
 149 static bool
 150 nv84_fence_suspend(struct nouveau_drm *drm)
 151 {
 152         struct nv84_fence_priv *priv = drm->fence;
 153         int i;
 154
 155         priv->suspend = vmalloc(array_size(sizeof(u32), drm->chan.nr));
 156         if (priv->suspend) {
 157                 for (i = 0; i < drm->chan.nr; i++)
 158                         priv->suspend[i] = nouveau_bo_rd32(priv->bo, i*4);
 159         }
 160
 161         return priv->suspend != NULL;
 162 }
 163
 164 static void
 165 nv84_fence_resume(struct nouveau_drm *drm)
 166 {
 167         struct nv84_fence_priv *priv = drm->fence;
 168         int i;
 169
 170         if (priv->suspend) {
 171                 for (i = 0; i < drm->chan.nr; i++)
 172                         nouveau_bo_wr32(priv->bo, i*4, priv->suspend[i]);
 173                 vfree(priv->suspend);
 174                 priv->suspend = NULL;
 175         }
 176 }
 177
 178 static void
 179 nv84_fence_destroy(struct nouveau_drm *drm)
 180 {
 181         struct nv84_fence_priv *priv = drm->fence;
 182         nouveau_bo_unmap(priv->bo);
 183         if (priv->bo)
 184                 nouveau_bo_unpin(priv->bo);
 185         nouveau_bo_ref(NULL, &priv->bo);
 186         drm->fence = NULL;
 187         kfree(priv);
 188 }
 189
 190 int
 191 nv84_fence_create(struct nouveau_drm *drm)
 192 {
 193         struct nv84_fence_priv *priv;
 194         u32 domain;
 195         int ret;
 196
 197         priv = drm->fence = kzalloc(sizeof(*priv), GFP_KERNEL);
 198         if (!priv)
 199                 return -ENOMEM;
 200
 201         priv->base.dtor = nv84_fence_destroy;
 202         priv->base.suspend = nv84_fence_suspend;
 203         priv->base.resume = nv84_fence_resume;
 204         priv->base.context_new = nv84_fence_context_new;
 205         priv->base.context_del = nv84_fence_context_del;
 206
 207         priv->base.uevent = true;
 208
 209         mutex_init(&priv->mutex);
 210
 211         /* Use VRAM if there is any ; otherwise fallback to system memory */
 212         domain = drm->client.device.info.ram_size != 0 ?
 213                 NOUVEAU_GEM_DOMAIN_VRAM :
 214                  /*
 215                   * fences created in sysmem must be non-cached or we
 216                   * will lose CPU/GPU coherency!
 217                   */
 218                 NOUVEAU_GEM_DOMAIN_GART | NOUVEAU_GEM_DOMAIN_COHERENT;
 219         ret = nouveau_bo_new(&drm->client, 16 * drm->chan.nr, 0,
 220                              domain, 0, 0, NULL, NULL, &priv->bo);
 221         if (ret == 0) {
 222                 ret = nouveau_bo_pin(priv->bo, domain, false);
 223                 if (ret == 0) {
 224                         ret = nouveau_bo_map(priv->bo);
 225                         if (ret)
 226                                 nouveau_bo_unpin(priv->bo);
 227                 }
 228                 if (ret)
 229                         nouveau_bo_ref(NULL, &priv->bo);
 230         }
 231
 232         if (ret)
 233                 nv84_fence_destroy(drm);
 234         return ret;
 235 }