drivers/gpu/drm/nouveau/nv17_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 <bskeggs@redhat.com>
  23  */
  24 #include "nouveau_drv.h"
  25 #include "nouveau_dma.h"
  26 #include "nv10_fence.h"
  27
  28 #include <nvif/push006c.h>
  29
  30 #include <nvif/class.h>
  31 #include <nvif/cl0002.h>
  32
  33 #include <nvhw/class/cl176e.h>
  34
  35 int
  36 nv17_fence_sync(struct nouveau_fence *fence,
  37                 struct nouveau_channel *prev, struct nouveau_channel *chan)
  38 {
  39         struct nouveau_cli *cli = (void *)prev->user.client;
  40         struct nv10_fence_priv *priv = chan->drm->fence;
  41         struct nv10_fence_chan *fctx = chan->fence;
  42         struct nvif_push *ppush = prev->chan.push;
  43         struct nvif_push *npush = chan->chan.push;
  44         u32 value;
  45         int ret;
  46
  47         if (!mutex_trylock(&cli->mutex))
  48                 return -EBUSY;
  49
  50         spin_lock(&priv->lock);
  51         value = priv->sequence;
  52         priv->sequence += 2;
  53         spin_unlock(&priv->lock);
  54
  55         ret = PUSH_WAIT(ppush, 5);
  56         if (!ret) {
  57                 PUSH_MTHD(ppush, NV176E, SET_CONTEXT_DMA_SEMAPHORE, fctx->sema.handle,
  58                                          SEMAPHORE_OFFSET, 0,
  59                                          SEMAPHORE_ACQUIRE, value + 0,
  60                                          SEMAPHORE_RELEASE, value + 1);
  61                 PUSH_KICK(ppush);
  62         }
  63
  64         if (!ret && !(ret = PUSH_WAIT(npush, 5))) {
  65                 PUSH_MTHD(npush, NV176E, SET_CONTEXT_DMA_SEMAPHORE, fctx->sema.handle,
  66                                          SEMAPHORE_OFFSET, 0,
  67                                          SEMAPHORE_ACQUIRE, value + 1,
  68                                          SEMAPHORE_RELEASE, value + 2);
  69                 PUSH_KICK(npush);
  70         }
  71
  72         mutex_unlock(&cli->mutex);
  73         return 0;
  74 }
  75
  76 static int
  77 nv17_fence_context_new(struct nouveau_channel *chan)
  78 {
  79         struct nv10_fence_priv *priv = chan->drm->fence;
  80         struct nv10_fence_chan *fctx;
  81         struct ttm_resource *reg = &priv->bo->bo.mem;
  82         u32 start = reg->start * PAGE_SIZE;
  83         u32 limit = start + reg->size - 1;
  84         int ret = 0;
  85
  86         fctx = chan->fence = kzalloc(sizeof(*fctx), GFP_KERNEL);
  87         if (!fctx)
  88                 return -ENOMEM;
  89
  90         nouveau_fence_context_new(chan, &fctx->base);
  91         fctx->base.emit = nv10_fence_emit;
  92         fctx->base.read = nv10_fence_read;
  93         fctx->base.sync = nv17_fence_sync;
  94
  95         ret = nvif_object_ctor(&chan->user, "fenceCtxDma", NvSema,
  96                                NV_DMA_FROM_MEMORY,
  97                                &(struct nv_dma_v0) {
  98                                         .target = NV_DMA_V0_TARGET_VRAM,
  99                                         .access = NV_DMA_V0_ACCESS_RDWR,
 100                                         .start = start,
 101                                         .limit = limit,
 102                                }, sizeof(struct nv_dma_v0),
 103                                &fctx->sema);
 104         if (ret)
 105                 nv10_fence_context_del(chan);
 106         return ret;
 107 }
 108
 109 void
 110 nv17_fence_resume(struct nouveau_drm *drm)
 111 {
 112         struct nv10_fence_priv *priv = drm->fence;
 113
 114         nouveau_bo_wr32(priv->bo, 0, priv->sequence);
 115 }
 116
 117 int
 118 nv17_fence_create(struct nouveau_drm *drm)
 119 {
 120         struct nv10_fence_priv *priv;
 121         int ret = 0;
 122
 123         priv = drm->fence = kzalloc(sizeof(*priv), GFP_KERNEL);
 124         if (!priv)
 125                 return -ENOMEM;
 126
 127         priv->base.dtor = nv10_fence_destroy;
 128         priv->base.resume = nv17_fence_resume;
 129         priv->base.context_new = nv17_fence_context_new;
 130         priv->base.context_del = nv10_fence_context_del;
 131         spin_lock_init(&priv->lock);
 132
 133         ret = nouveau_bo_new(&drm->client, 4096, 0x1000, TTM_PL_FLAG_VRAM,
 134                              0, 0x0000, NULL, NULL, &priv->bo);
 135         if (!ret) {
 136                 ret = nouveau_bo_pin(priv->bo, TTM_PL_FLAG_VRAM, false);
 137                 if (!ret) {
 138                         ret = nouveau_bo_map(priv->bo);
 139                         if (ret)
 140                                 nouveau_bo_unpin(priv->bo);
 141                 }
 142                 if (ret)
 143                         nouveau_bo_ref(NULL, &priv->bo);
 144         }
 145
 146         if (ret) {
 147                 nv10_fence_destroy(drm);
 148                 return ret;
 149         }
 150
 151         nouveau_bo_wr32(priv->bo, 0x000, 0x00000000);
 152         return ret;
 153 }