LXR linux/drivers/gpu/drm/nouveau/nv50

   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
  35static int
  36nv50_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_ctor(&chan->user, "fenceCtxDma", NvSema,
  55                               NV_DMA_IN_MEMORY,
  56                               &(struct nv_dma_v0) {
  57                                        .target = NV_DMA_V0_TARGET_VRAM,
  58                                        .access = NV_DMA_V0_ACCESS_RDWR,
  59                                        .start = start,
  60                                        .limit = limit,
  61                               }, sizeof(struct nv_dma_v0),
  62                               &fctx->sema);
  63        if (ret)
  64                nv10_fence_context_del(chan);
  65        return ret;
  66}
  67
  68int
  69nv50_fence_create(struct nouveau_drm *drm)
  70{
  71        struct nv10_fence_priv *priv;
  72        int ret = 0;
  73
  74        priv = drm->fence = kzalloc(sizeof(*priv), GFP_KERNEL);
  75        if (!priv)
  76                return -ENOMEM;
  77
  78        priv->base.dtor = nv10_fence_destroy;
  79        priv->base.resume = nv17_fence_resume;
  80        priv->base.context_new = nv50_fence_context_new;
  81        priv->base.context_del = nv10_fence_context_del;
  82        spin_lock_init(&priv->lock);
  83
  84        ret = nouveau_bo_new(&drm->client, 4096, 0x1000, TTM_PL_FLAG_VRAM,
  85                             0, 0x0000, NULL, NULL, &priv->bo);
  86        if (!ret) {
  87                ret = nouveau_bo_pin(priv->bo, TTM_PL_FLAG_VRAM, false);
  88                if (!ret) {
  89                        ret = nouveau_bo_map(priv->bo);
  90                        if (ret)
  91                                nouveau_bo_unpin(priv->bo);
  92                }
  93                if (ret)
  94                        nouveau_bo_ref(NULL, &priv->bo);
  95        }
  96
  97        if (ret) {
  98                nv10_fence_destroy(drm);
  99                return ret;
 100        }
 101
 102        nouveau_bo_wr32(priv->bo, 0x000, 0x00000000);
 103        return ret;
 104}
 105