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 <core/object.h>
  26 #include <core/class.h>
  27
  28 #include "nouveau_drm.h"
  29 #include "nouveau_dma.h"
  30 #include "nouveau_fence.h"
  31
  32 #include "nv50_display.h"
  33
  34 struct nv50_fence_chan {
  35         struct nouveau_fence_chan base;
  36 };
  37
  38 struct nv50_fence_priv {
  39         struct nouveau_fence_priv base;
  40         struct nouveau_bo *bo;
  41         spinlock_t lock;
  42         u32 sequence;
  43 };
  44
  45 static int
  46 nv50_fence_context_new(struct nouveau_channel *chan)
  47 {
  48         struct drm_device *dev = chan->drm->dev;
  49         struct nv50_fence_priv *priv = chan->drm->fence;
  50         struct nv50_fence_chan *fctx;
  51         struct ttm_mem_reg *mem = &priv->bo->bo.mem;
  52         struct nouveau_object *object;
  53         int ret, i;
  54
  55         fctx = chan->fence = kzalloc(sizeof(*fctx), GFP_KERNEL);
  56         if (!fctx)
  57                 return -ENOMEM;
  58
  59         nouveau_fence_context_new(&fctx->base);
  60
  61         ret = nouveau_object_new(nv_object(chan->cli), chan->handle,
  62                                  NvSema, 0x0002,
  63                                  &(struct nv_dma_class) {
  64                                         .flags = NV_DMA_TARGET_VRAM |
  65                                                  NV_DMA_ACCESS_RDWR,
  66                                         .start = mem->start * PAGE_SIZE,
  67                                         .limit = mem->size - 1,
  68                                  }, sizeof(struct nv_dma_class),
  69                                  &object);
  70
  71         /* dma objects for display sync channel semaphore blocks */
  72         for (i = 0; !ret && i < dev->mode_config.num_crtc; i++) {
  73                 struct nouveau_bo *bo = nv50_display_crtc_sema(dev, i);
  74
  75                 ret = nouveau_object_new(nv_object(chan->cli), chan->handle,
  76                                          NvEvoSema0 + i, 0x003d,
  77                                          &(struct nv_dma_class) {
  78                                                 .flags = NV_DMA_TARGET_VRAM |
  79                                                          NV_DMA_ACCESS_RDWR,
  80                                                 .start = bo->bo.offset,
  81                                                 .limit = bo->bo.offset + 0xfff,
  82                                          }, sizeof(struct nv_dma_class),
  83                                          &object);
  84         }
  85
  86         if (ret)
  87                 nv10_fence_context_del(chan);
  88         return ret;
  89 }
  90
  91 int
  92 nv50_fence_create(struct nouveau_drm *drm)
  93 {
  94         struct nv50_fence_priv *priv;
  95         int ret = 0;
  96
  97         priv = drm->fence = kzalloc(sizeof(*priv), GFP_KERNEL);
  98         if (!priv)
  99                 return -ENOMEM;
 100
 101         priv->base.dtor = nv10_fence_destroy;
 102         priv->base.context_new = nv50_fence_context_new;
 103         priv->base.context_del = nv10_fence_context_del;
 104         priv->base.emit = nv10_fence_emit;
 105         priv->base.read = nv10_fence_read;
 106         priv->base.sync = nv17_fence_sync;
 107         spin_lock_init(&priv->lock);
 108
 109         ret = nouveau_bo_new(drm->dev, 4096, 0x1000, TTM_PL_FLAG_VRAM,
 110                              0, 0x0000, NULL, &priv->bo);
 111         if (!ret) {
 112                 ret = nouveau_bo_pin(priv->bo, TTM_PL_FLAG_VRAM);
 113                 if (!ret) {
 114                         ret = nouveau_bo_map(priv->bo);
 115                         if (ret)
 116                                 nouveau_bo_unpin(priv->bo);
 117                 }
 118                 if (ret)
 119                         nouveau_bo_ref(NULL, &priv->bo);
 120         }
 121
 122         if (ret == 0) {
 123                 nouveau_bo_wr32(priv->bo, 0x000, 0x00000000);
 124                 priv->base.sync = nv17_fence_sync;
 125         }
 126
 127         if (ret)
 128                 nv10_fence_destroy(drm);
 129         return ret;
 130 }