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_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
  67int
  68nv50_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}
 104