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 25 #include <core/object.h> 26 #include <core/class.h> 27 28 #include "nouveau_drm.h" 29 #include "nouveau_dma.h" 30 #include "nouveau_fence.h" 31 32 struct nv10_fence_chan { 33 struct nouveau_fence_chan base; 34 }; 35 36 struct nv10_fence_priv { 37 struct nouveau_fence_priv base; 38 struct nouveau_bo *bo; 39 spinlock_t lock; 40 u32 sequence; 41 }; 42 43 int 44 nv10_fence_emit(struct nouveau_fence *fence) 45 { 46 struct nouveau_channel *chan = fence->channel; 47 int ret = RING_SPACE(chan, 2); 48 if (ret == 0) { 49 BEGIN_NV04(chan, 0, NV10_SUBCHAN_REF_CNT, 1); 50 OUT_RING (chan, fence->sequence); 51 FIRE_RING (chan); 52 } 53 return ret; 54 } 55 56 57 static int 58 nv10_fence_sync(struct nouveau_fence *fence, 59 struct nouveau_channel *prev, struct nouveau_channel *chan) 60 { 61 return -ENODEV; 62 } 63 64 int 65 nv17_fence_sync(struct nouveau_fence *fence, 66 struct nouveau_channel *prev, struct nouveau_channel *chan) 67 { 68 struct nv10_fence_priv *priv = chan->drm->fence; 69 u32 value; 70 int ret; 71 72 if (!mutex_trylock(&prev->cli->mutex)) 73 return -EBUSY; 74 75 spin_lock(&priv->lock); 76 value = priv->sequence; 77 priv->sequence += 2; 78 spin_unlock(&priv->lock); 79 80 ret = RING_SPACE(prev, 5); 81 if (!ret) { 82 BEGIN_NV04(prev, 0, NV11_SUBCHAN_DMA_SEMAPHORE, 4); 83 OUT_RING (prev, NvSema); 84 OUT_RING (prev, 0); 85 OUT_RING (prev, value + 0); 86 OUT_RING (prev, value + 1); 87 FIRE_RING (prev); 88 } 89 90 if (!ret && !(ret = RING_SPACE(chan, 5))) { 91 BEGIN_NV04(chan, 0, NV11_SUBCHAN_DMA_SEMAPHORE, 4); 92 OUT_RING (chan, NvSema); 93 OUT_RING (chan, 0); 94 OUT_RING (chan, value + 1); 95 OUT_RING (chan, value + 2); 96 FIRE_RING (chan); 97 } 98 99 mutex_unlock(&prev->cli->mutex); 100 return 0; 101 } 102 103 u32 104 nv10_fence_read(struct nouveau_channel *chan) 105 { 106 return nv_ro32(chan->object, 0x0048); 107 } 108 109 void 110 nv10_fence_context_del(struct nouveau_channel *chan) 111 { 112 struct nv10_fence_chan *fctx = chan->fence; 113 nouveau_fence_context_del(&fctx->base); 114 chan->fence = NULL; 115 kfree(fctx); 116 } 117 118 static int 119 nv10_fence_context_new(struct nouveau_channel *chan) 120 { 121 struct nv10_fence_priv *priv = chan->drm->fence; 122 struct nv10_fence_chan *fctx; 123 int ret = 0; 124 125 fctx = chan->fence = kzalloc(sizeof(*fctx), GFP_KERNEL); 126 if (!fctx) 127 return -ENOMEM; 128 129 nouveau_fence_context_new(&fctx->base); 130 131 if (priv->bo) { 132 struct ttm_mem_reg *mem = &priv->bo->bo.mem; 133 struct nouveau_object *object; 134 u32 start = mem->start * PAGE_SIZE; 135 u32 limit = mem->start + mem->size - 1; 136 137 ret = nouveau_object_new(nv_object(chan->cli), chan->handle, 138 NvSema, 0x0002, 139 &(struct nv_dma_class) { 140 .flags = NV_DMA_TARGET_VRAM | 141 NV_DMA_ACCESS_RDWR, 142 .start = start, 143 .limit = limit, 144 }, sizeof(struct nv_dma_class), 145 &object); 146 } 147 148 if (ret) 149 nv10_fence_context_del(chan); 150 return ret; 151 } 152 153 void 154 nv10_fence_destroy(struct nouveau_drm *drm) 155 { 156 struct nv10_fence_priv *priv = drm->fence; 157 nouveau_bo_unmap(priv->bo); 158 nouveau_bo_ref(NULL, &priv->bo); 159 drm->fence = NULL; 160 kfree(priv); 161 } 162 163 int 164 nv10_fence_create(struct nouveau_drm *drm) 165 { 166 struct nv10_fence_priv *priv; 167 int ret = 0; 168 169 priv = drm->fence = kzalloc(sizeof(*priv), GFP_KERNEL); 170 if (!priv) 171 return -ENOMEM; 172 173 priv->base.dtor = nv10_fence_destroy; 174 priv->base.context_new = nv10_fence_context_new; 175 priv->base.context_del = nv10_fence_context_del; 176 priv->base.emit = nv10_fence_emit; 177 priv->base.read = nv10_fence_read; 178 priv->base.sync = nv10_fence_sync; 179 spin_lock_init(&priv->lock); 180 181 if (nv_device(drm->device)->chipset >= 0x17) { 182 ret = nouveau_bo_new(drm->dev, 4096, 0x1000, TTM_PL_FLAG_VRAM, 183 0, 0x0000, NULL, &priv->bo); 184 if (!ret) { 185 ret = nouveau_bo_pin(priv->bo, TTM_PL_FLAG_VRAM); 186 if (!ret) 187 ret = nouveau_bo_map(priv->bo); 188 if (ret) 189 nouveau_bo_ref(NULL, &priv->bo); 190 } 191 192 if (ret == 0) { 193 nouveau_bo_wr32(priv->bo, 0x000, 0x00000000); 194 priv->base.sync = nv17_fence_sync; 195 } 196 } 197 198 if (ret) 199 nv10_fence_destroy(drm); 200 return ret; 201 } 202