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 #include "nouveau_drv.h" 25 #include "nouveau_dma.h" 26 #include "nouveau_fence.h" 27 28 #include <nvif/if0004.h> 29 #include <nvif/push006c.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 nvif_push *push = unrcu_pointer(fence->channel)->chan.push; 43 int ret = PUSH_WAIT(push, 2); 44 if (ret == 0) { 45 PUSH_NVSQ(push, NV_SW, 0x0150, fence->base.seqno); 46 PUSH_KICK(push); 47 } 48 return ret; 49 } 50 51 static int 52 nv04_fence_sync(struct nouveau_fence *fence, 53 struct nouveau_channel *prev, struct nouveau_channel *chan) 54 { 55 return -ENODEV; 56 } 57 58 static u32 59 nv04_fence_read(struct nouveau_channel *chan) 60 { 61 struct nv04_nvsw_get_ref_v0 args = {}; 62 WARN_ON(nvif_object_mthd(&chan->nvsw, NV04_NVSW_GET_REF, 63 &args, sizeof(args))); 64 return args.ref; 65 } 66 67 static void 68 nv04_fence_context_del(struct nouveau_channel *chan) 69 { 70 struct nv04_fence_chan *fctx = chan->fence; 71 nouveau_fence_context_del(&fctx->base); 72 chan->fence = NULL; 73 nouveau_fence_context_free(&fctx->base); 74 } 75 76 static int 77 nv04_fence_context_new(struct nouveau_channel *chan) 78 { 79 struct nv04_fence_chan *fctx = kzalloc(sizeof(*fctx), GFP_KERNEL); 80 if (fctx) { 81 nouveau_fence_context_new(chan, &fctx->base); 82 fctx->base.emit = nv04_fence_emit; 83 fctx->base.sync = nv04_fence_sync; 84 fctx->base.read = nv04_fence_read; 85 chan->fence = fctx; 86 return 0; 87 } 88 return -ENOMEM; 89 } 90 91 static void 92 nv04_fence_destroy(struct nouveau_drm *drm) 93 { 94 struct nv04_fence_priv *priv = drm->fence; 95 drm->fence = NULL; 96 kfree(priv); 97 } 98 99 int 100 nv04_fence_create(struct nouveau_drm *drm) 101 { 102 struct nv04_fence_priv *priv; 103 104 priv = drm->fence = kzalloc(sizeof(*priv), GFP_KERNEL); 105 if (!priv) 106 return -ENOMEM; 107 108 priv->base.dtor = nv04_fence_destroy; 109 priv->base.context_new = nv04_fence_context_new; 110 priv->base.context_del = nv04_fence_context_del; 111 return 0; 112 } 113