1 /* $NetBSD: nouveau_nv10_fence.c,v 1.2 2014/08/23 08:03:33 riastradh Exp $ */ 2 3 /* 4 * Copyright 2012 Red Hat Inc. 5 * 6 * Permission is hereby granted, free of charge, to any person obtaining a 7 * copy of this software and associated documentation files (the "Software"), 8 * to deal in the Software without restriction, including without limitation 9 * the rights to use, copy, modify, merge, publish, distribute, sublicense, 10 * and/or sell copies of the Software, and to permit persons to whom the 11 * Software is furnished to do so, subject to the following conditions: 12 * 13 * The above copyright notice and this permission notice shall be included in 14 * all copies or substantial portions of the Software. 15 * 16 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR 17 * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, 18 * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL 19 * THE COPYRIGHT HOLDER(S) OR AUTHOR(S) BE LIABLE FOR ANY CLAIM, DAMAGES OR 20 * OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, 21 * ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR 22 * OTHER DEALINGS IN THE SOFTWARE. 23 * 24 * Authors: Ben Skeggs <bskeggs@redhat.com> 25 */ 26 27 #include <sys/cdefs.h> 28 __KERNEL_RCSID(0, "$NetBSD: nouveau_nv10_fence.c,v 1.2 2014/08/23 08:03:33 riastradh Exp $"); 29 30 #include <core/object.h> 31 #include <core/class.h> 32 33 #include "nouveau_drm.h" 34 #include "nouveau_dma.h" 35 #include "nv10_fence.h" 36 37 int 38 nv10_fence_emit(struct nouveau_fence *fence) 39 { 40 struct nouveau_channel *chan = fence->channel; 41 int ret = RING_SPACE(chan, 2); 42 if (ret == 0) { 43 BEGIN_NV04(chan, 0, NV10_SUBCHAN_REF_CNT, 1); 44 OUT_RING (chan, fence->sequence); 45 FIRE_RING (chan); 46 } 47 return ret; 48 } 49 50 51 static int 52 nv10_fence_sync(struct nouveau_fence *fence, 53 struct nouveau_channel *prev, struct nouveau_channel *chan) 54 { 55 return -ENODEV; 56 } 57 58 u32 59 nv10_fence_read(struct nouveau_channel *chan) 60 { 61 return nv_ro32(chan->object, 0x0048); 62 } 63 64 void 65 nv10_fence_context_del(struct nouveau_channel *chan) 66 { 67 struct nv10_fence_chan *fctx = chan->fence; 68 nouveau_fence_context_del(&fctx->base); 69 chan->fence = NULL; 70 kfree(fctx); 71 } 72 73 static int 74 nv10_fence_context_new(struct nouveau_channel *chan) 75 { 76 struct nv10_fence_chan *fctx; 77 78 fctx = chan->fence = kzalloc(sizeof(*fctx), GFP_KERNEL); 79 if (!fctx) 80 return -ENOMEM; 81 82 nouveau_fence_context_new(&fctx->base); 83 fctx->base.emit = nv10_fence_emit; 84 fctx->base.read = nv10_fence_read; 85 fctx->base.sync = nv10_fence_sync; 86 return 0; 87 } 88 89 void 90 nv10_fence_destroy(struct nouveau_drm *drm) 91 { 92 struct nv10_fence_priv *priv = drm->fence; 93 nouveau_bo_unmap(priv->bo); 94 if (priv->bo) 95 nouveau_bo_unpin(priv->bo); 96 nouveau_bo_ref(NULL, &priv->bo); 97 drm->fence = NULL; 98 kfree(priv); 99 } 100 101 int 102 nv10_fence_create(struct nouveau_drm *drm) 103 { 104 struct nv10_fence_priv *priv; 105 106 priv = drm->fence = kzalloc(sizeof(*priv), GFP_KERNEL); 107 if (!priv) 108 return -ENOMEM; 109 110 priv->base.dtor = nv10_fence_destroy; 111 priv->base.context_new = nv10_fence_context_new; 112 priv->base.context_del = nv10_fence_context_del; 113 spin_lock_init(&priv->lock); 114 return 0; 115 } 116