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 #include "nouveau_drv.h" 25 #include "nouveau_dma.h" 26 #include "nv10_fence.h" 27 28 #include <nvif/push006c.h> 29 30 #include <nvif/class.h> 31 #include <nvif/cl0002.h> 32 33 #include <nvhw/class/cl176e.h> 34 35 int 36 nv17_fence_sync(struct nouveau_fence *fence, 37 struct nouveau_channel *prev, struct nouveau_channel *chan) 38 { 39 struct nouveau_cli *cli = (void *)prev->user.client; 40 struct nv10_fence_priv *priv = chan->drm->fence; 41 struct nv10_fence_chan *fctx = chan->fence; 42 struct nvif_push *ppush = prev->chan.push; 43 struct nvif_push *npush = chan->chan.push; 44 u32 value; 45 int ret; 46 47 if (!mutex_trylock(&cli->mutex)) 48 return -EBUSY; 49 50 spin_lock(&priv->lock); 51 value = priv->sequence; 52 priv->sequence += 2; 53 spin_unlock(&priv->lock); 54 55 ret = PUSH_WAIT(ppush, 5); 56 if (!ret) { 57 PUSH_MTHD(ppush, NV176E, SET_CONTEXT_DMA_SEMAPHORE, fctx->sema.handle, 58 SEMAPHORE_OFFSET, 0, 59 SEMAPHORE_ACQUIRE, value + 0, 60 SEMAPHORE_RELEASE, value + 1); 61 PUSH_KICK(ppush); 62 } 63 64 if (!ret && !(ret = PUSH_WAIT(npush, 5))) { 65 PUSH_MTHD(npush, NV176E, SET_CONTEXT_DMA_SEMAPHORE, fctx->sema.handle, 66 SEMAPHORE_OFFSET, 0, 67 SEMAPHORE_ACQUIRE, value + 1, 68 SEMAPHORE_RELEASE, value + 2); 69 PUSH_KICK(npush); 70 } 71 72 mutex_unlock(&cli->mutex); 73 return 0; 74 } 75 76 static int 77 nv17_fence_context_new(struct nouveau_channel *chan) 78 { 79 struct nv10_fence_priv *priv = chan->drm->fence; 80 struct nv10_fence_chan *fctx; 81 struct ttm_resource *reg = &priv->bo->bo.mem; 82 u32 start = reg->start * PAGE_SIZE; 83 u32 limit = start + reg->size - 1; 84 int ret = 0; 85 86 fctx = chan->fence = kzalloc(sizeof(*fctx), GFP_KERNEL); 87 if (!fctx) 88 return -ENOMEM; 89 90 nouveau_fence_context_new(chan, &fctx->base); 91 fctx->base.emit = nv10_fence_emit; 92 fctx->base.read = nv10_fence_read; 93 fctx->base.sync = nv17_fence_sync; 94 95 ret = nvif_object_ctor(&chan->user, "fenceCtxDma", NvSema, 96 NV_DMA_FROM_MEMORY, 97 &(struct nv_dma_v0) { 98 .target = NV_DMA_V0_TARGET_VRAM, 99 .access = NV_DMA_V0_ACCESS_RDWR, 100 .start = start, 101 .limit = limit, 102 }, sizeof(struct nv_dma_v0), 103 &fctx->sema); 104 if (ret) 105 nv10_fence_context_del(chan); 106 return ret; 107 } 108 109 void 110 nv17_fence_resume(struct nouveau_drm *drm) 111 { 112 struct nv10_fence_priv *priv = drm->fence; 113 114 nouveau_bo_wr32(priv->bo, 0, priv->sequence); 115 } 116 117 int 118 nv17_fence_create(struct nouveau_drm *drm) 119 { 120 struct nv10_fence_priv *priv; 121 int ret = 0; 122 123 priv = drm->fence = kzalloc(sizeof(*priv), GFP_KERNEL); 124 if (!priv) 125 return -ENOMEM; 126 127 priv->base.dtor = nv10_fence_destroy; 128 priv->base.resume = nv17_fence_resume; 129 priv->base.context_new = nv17_fence_context_new; 130 priv->base.context_del = nv10_fence_context_del; 131 spin_lock_init(&priv->lock); 132 133 ret = nouveau_bo_new(&drm->client, 4096, 0x1000, 134 NOUVEAU_GEM_DOMAIN_VRAM, 135 0, 0x0000, NULL, NULL, &priv->bo); 136 if (!ret) { 137 ret = nouveau_bo_pin(priv->bo, NOUVEAU_GEM_DOMAIN_VRAM, false); 138 if (!ret) { 139 ret = nouveau_bo_map(priv->bo); 140 if (ret) 141 nouveau_bo_unpin(priv->bo); 142 } 143 if (ret) 144 nouveau_bo_ref(NULL, &priv->bo); 145 } 146 147 if (ret) { 148 nv10_fence_destroy(drm); 149 return ret; 150 } 151 152 nouveau_bo_wr32(priv->bo, 0x000, 0x00000000); 153 return ret; 154 } 155