drivers/gpu/drm/nouveau/nv50_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
  25 #include <nvif/os.h>
  26 #include <nvif/class.h>
  27 #include <nvif/cl0002.h>
  28
  29 #include "nouveau_drv.h"
  30 #include "nouveau_dma.h"
  31 #include "nv10_fence.h"
  32
  33 #include "nv50_display.h"
  34
  35 static int
  36 nv50_fence_context_new(struct nouveau_channel *chan)
  37 {
  38         struct nv10_fence_priv *priv = chan->drm->fence;
  39         struct nv10_fence_chan *fctx;
  40         struct ttm_mem_reg *reg = &priv->bo->bo.mem;
  41         u32 start = reg->start * PAGE_SIZE;
  42         u32 limit = start + reg->size - 1;
  43         int ret;
  44
  45         fctx = chan->fence = kzalloc(sizeof(*fctx), GFP_KERNEL);
  46         if (!fctx)
  47                 return -ENOMEM;
  48
  49         nouveau_fence_context_new(chan, &fctx->base);
  50         fctx->base.emit = nv10_fence_emit;
  51         fctx->base.read = nv10_fence_read;
  52         fctx->base.sync = nv17_fence_sync;
  53
  54         ret = nvif_object_init(&chan->user, NvSema, NV_DMA_IN_MEMORY,
  55                                &(struct nv_dma_v0) {
  56                                         .target = NV_DMA_V0_TARGET_VRAM,
  57                                         .access = NV_DMA_V0_ACCESS_RDWR,
  58                                         .start = start,
  59                                         .limit = limit,
  60                                }, sizeof(struct nv_dma_v0),
  61                                &fctx->sema);
  62         if (ret)
  63                 nv10_fence_context_del(chan);
  64         return ret;
  65 }
  66
  67 int
  68 nv50_fence_create(struct nouveau_drm *drm)
  69 {
  70         struct nv10_fence_priv *priv;
  71         int ret = 0;
  72
  73         priv = drm->fence = kzalloc(sizeof(*priv), GFP_KERNEL);
  74         if (!priv)
  75                 return -ENOMEM;
  76
  77         priv->base.dtor = nv10_fence_destroy;
  78         priv->base.resume = nv17_fence_resume;
  79         priv->base.context_new = nv50_fence_context_new;
  80         priv->base.context_del = nv10_fence_context_del;
  81         spin_lock_init(&priv->lock);
  82
  83         ret = nouveau_bo_new(&drm->client, 4096, 0x1000, TTM_PL_FLAG_VRAM,
  84                              0, 0x0000, NULL, NULL, &priv->bo);
  85         if (!ret) {
  86                 ret = nouveau_bo_pin(priv->bo, TTM_PL_FLAG_VRAM, false);
  87                 if (!ret) {
  88                         ret = nouveau_bo_map(priv->bo);
  89                         if (ret)
  90                                 nouveau_bo_unpin(priv->bo);
  91                 }
  92                 if (ret)
  93                         nouveau_bo_ref(NULL, &priv->bo);
  94         }
  95
  96         if (ret) {
  97                 nv10_fence_destroy(drm);
  98                 return ret;
  99         }
 100
 101         nouveau_bo_wr32(priv->bo, 0x000, 0x00000000);
 102         return ret;
 103 }