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 "nouveau_drm.h" 26 #include "nouveau_dma.h" 27 #include "nouveau_fence.h" 28 29 #include <nvif/if0004.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->base.seqno); 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 nv04_nvsw_get_ref_v0 args = {}; 63 WARN_ON(nvif_object_mthd(&chan->nvsw, NV04_NVSW_GET_REF, 64 &args, sizeof(args))); 65 return args.ref; 66 } 67 68 static void 69 nv04_fence_context_del(struct nouveau_channel *chan) 70 { 71 struct nv04_fence_chan *fctx = chan->fence; 72 nouveau_fence_context_del(&fctx->base); 73 chan->fence = NULL; 74 nouveau_fence_context_free(&fctx->base); 75 } 76 77 static int 78 nv04_fence_context_new(struct nouveau_channel *chan) 79 { 80 struct nv04_fence_chan *fctx = kzalloc(sizeof(*fctx), GFP_KERNEL); 81 if (fctx) { 82 nouveau_fence_context_new(chan, &fctx->base); 83 fctx->base.emit = nv04_fence_emit; 84 fctx->base.sync = nv04_fence_sync; 85 fctx->base.read = nv04_fence_read; 86 chan->fence = fctx; 87 return 0; 88 } 89 return -ENOMEM; 90 } 91 92 static void 93 nv04_fence_destroy(struct nouveau_drm *drm) 94 { 95 struct nv04_fence_priv *priv = drm->fence; 96 drm->fence = NULL; 97 kfree(priv); 98 } 99 100 int 101 nv04_fence_create(struct nouveau_drm *drm) 102 { 103 struct nv04_fence_priv *priv; 104 105 priv = drm->fence = kzalloc(sizeof(*priv), GFP_KERNEL); 106 if (!priv) 107 return -ENOMEM; 108 109 priv->base.dtor = nv04_fence_destroy; 110 priv->base.context_new = nv04_fence_context_new; 111 priv->base.context_del = nv04_fence_context_del; 112 priv->base.contexts = 15; 113 priv->base.context_base = fence_context_alloc(priv->base.contexts); 114 return 0; 115 } 116