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 "nouveau_drv.h" 26 #include "nouveau_dma.h" 27 #include "nv10_fence.h" 28 29 int 30 nv10_fence_emit(struct nouveau_fence *fence) 31 { 32 struct nouveau_channel *chan = fence->channel; 33 int ret = RING_SPACE(chan, 2); 34 if (ret == 0) { 35 BEGIN_NV04(chan, 0, NV10_SUBCHAN_REF_CNT, 1); 36 OUT_RING (chan, fence->base.seqno); 37 FIRE_RING (chan); 38 } 39 return ret; 40 } 41 42 43 static int 44 nv10_fence_sync(struct nouveau_fence *fence, 45 struct nouveau_channel *prev, struct nouveau_channel *chan) 46 { 47 return -ENODEV; 48 } 49 50 u32 51 nv10_fence_read(struct nouveau_channel *chan) 52 { 53 return nvif_rd32(&chan->user, 0x0048); 54 } 55 56 void 57 nv10_fence_context_del(struct nouveau_channel *chan) 58 { 59 struct nv10_fence_chan *fctx = chan->fence; 60 nouveau_fence_context_del(&fctx->base); 61 nvif_object_fini(&fctx->sema); 62 chan->fence = NULL; 63 nouveau_fence_context_free(&fctx->base); 64 } 65 66 static int 67 nv10_fence_context_new(struct nouveau_channel *chan) 68 { 69 struct nv10_fence_chan *fctx; 70 71 fctx = chan->fence = kzalloc(sizeof(*fctx), GFP_KERNEL); 72 if (!fctx) 73 return -ENOMEM; 74 75 nouveau_fence_context_new(chan, &fctx->base); 76 fctx->base.emit = nv10_fence_emit; 77 fctx->base.read = nv10_fence_read; 78 fctx->base.sync = nv10_fence_sync; 79 return 0; 80 } 81 82 void 83 nv10_fence_destroy(struct nouveau_drm *drm) 84 { 85 struct nv10_fence_priv *priv = drm->fence; 86 nouveau_bo_unmap(priv->bo); 87 if (priv->bo) 88 nouveau_bo_unpin(priv->bo); 89 nouveau_bo_ref(NULL, &priv->bo); 90 drm->fence = NULL; 91 kfree(priv); 92 } 93 94 int 95 nv10_fence_create(struct nouveau_drm *drm) 96 { 97 struct nv10_fence_priv *priv; 98 99 priv = drm->fence = kzalloc(sizeof(*priv), GFP_KERNEL); 100 if (!priv) 101 return -ENOMEM; 102 103 priv->base.dtor = nv10_fence_destroy; 104 priv->base.context_new = nv10_fence_context_new; 105 priv->base.context_del = nv10_fence_context_del; 106 spin_lock_init(&priv->lock); 107 return 0; 108 } 109