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 23 */ 24 25 #include <engine/fifo.h> 26 27 #include "nouveau_drm.h" 28 #include "nouveau_dma.h" 29 #include "nouveau_fence.h" 30 31 struct nv04_fence_chan { 32 struct nouveau_fence_chan base; 33 }; 34 35 struct nv04_fence_priv { 36 struct nouveau_fence_priv base; 37 }; 38 39 static int 40 nv04_fence_emit(struct nouveau_fence *fence) 41 { 42 struct nouveau_channel *chan = fence->channel; 43 int ret = RING_SPACE(chan, 2); 44 if (ret == 0) { 45 BEGIN_NV04(chan, NvSubSw, 0x0150, 1); 46 OUT_RING (chan, fence->sequence); 47 FIRE_RING (chan); 48 } 49 return ret; 50 } 51 52 static int 53 nv04_fence_sync(struct nouveau_fence *fence, 54 struct nouveau_channel *prev, struct nouveau_channel *chan) 55 { 56 return -ENODEV; 57 } 58 59 static u32 60 nv04_fence_read(struct nouveau_channel *chan) 61 { 62 struct nouveau_fifo_chan *fifo = (void *)chan->object; 63 return atomic_read(&fifo->refcnt); 64 } 65 66 static void 67 nv04_fence_context_del(struct nouveau_channel *chan) 68 { 69 struct nv04_fence_chan *fctx = chan->fence; 70 nouveau_fence_context_del(&fctx->base); 71 chan->fence = NULL; 72 kfree(fctx); 73 } 74 75 static int 76 nv04_fence_context_new(struct nouveau_channel *chan) 77 { 78 struct nv04_fence_chan *fctx = kzalloc(sizeof(*fctx), GFP_KERNEL); 79 if (fctx) { 80 nouveau_fence_context_new(&fctx->base); 81 chan->fence = fctx; 82 return 0; 83 } 84 return -ENOMEM; 85 } 86 87 static void 88 nv04_fence_destroy(struct nouveau_drm *drm) 89 { 90 struct nv04_fence_priv *priv = drm->fence; 91 drm->fence = NULL; 92 kfree(priv); 93 } 94 95 int 96 nv04_fence_create(struct nouveau_drm *drm) 97 { 98 struct nv04_fence_priv *priv; 99 100 priv = drm->fence = kzalloc(sizeof(*priv), GFP_KERNEL); 101 if (!priv) 102 return -ENOMEM; 103 104 priv->base.dtor = nv04_fence_destroy; 105 priv->base.context_new = nv04_fence_context_new; 106 priv->base.context_del = nv04_fence_context_del; 107 priv->base.emit = nv04_fence_emit; 108 priv->base.sync = nv04_fence_sync; 109 priv->base.read = nv04_fence_read; 110 return 0; 111 } 112