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 "nv10_fence.h" 31 32 int 33 nv17_fence_sync(struct nouveau_fence *fence, 34 struct nouveau_channel *prev, struct nouveau_channel *chan) 35 { 36 struct nv10_fence_priv *priv = chan->drm->fence; 37 u32 value; 38 int ret; 39 40 if (!mutex_trylock(&prev->cli->mutex)) 41 return -EBUSY; 42 43 spin_lock(&priv->lock); 44 value = priv->sequence; 45 priv->sequence += 2; 46 spin_unlock(&priv->lock); 47 48 ret = RING_SPACE(prev, 5); 49 if (!ret) { 50 BEGIN_NV04(prev, 0, NV11_SUBCHAN_DMA_SEMAPHORE, 4); 51 OUT_RING (prev, NvSema); 52 OUT_RING (prev, 0); 53 OUT_RING (prev, value + 0); 54 OUT_RING (prev, value + 1); 55 FIRE_RING (prev); 56 } 57 58 if (!ret && !(ret = RING_SPACE(chan, 5))) { 59 BEGIN_NV04(chan, 0, NV11_SUBCHAN_DMA_SEMAPHORE, 4); 60 OUT_RING (chan, NvSema); 61 OUT_RING (chan, 0); 62 OUT_RING (chan, value + 1); 63 OUT_RING (chan, value + 2); 64 FIRE_RING (chan); 65 } 66 67 mutex_unlock(&prev->cli->mutex); 68 return 0; 69 } 70 71 static int 72 nv17_fence_context_new(struct nouveau_channel *chan) 73 { 74 struct nv10_fence_priv *priv = chan->drm->fence; 75 struct nv10_fence_chan *fctx; 76 struct ttm_mem_reg *mem = &priv->bo->bo.mem; 77 struct nouveau_object *object; 78 u32 start = mem->start * PAGE_SIZE; 79 u32 limit = start + mem->size - 1; 80 int ret = 0; 81 82 fctx = chan->fence = kzalloc(sizeof(*fctx), GFP_KERNEL); 83 if (!fctx) 84 return -ENOMEM; 85 86 nouveau_fence_context_new(&fctx->base); 87 fctx->base.emit = nv10_fence_emit; 88 fctx->base.read = nv10_fence_read; 89 fctx->base.sync = nv17_fence_sync; 90 91 ret = nouveau_object_new(nv_object(chan->cli), chan->handle, 92 NvSema, 0x0002, 93 &(struct nv_dma_class) { 94 .flags = NV_DMA_TARGET_VRAM | 95 NV_DMA_ACCESS_RDWR, 96 .start = start, 97 .limit = limit, 98 }, sizeof(struct nv_dma_class), 99 &object); 100 if (ret) 101 nv10_fence_context_del(chan); 102 return ret; 103 } 104 105 void 106 nv17_fence_resume(struct nouveau_drm *drm) 107 { 108 struct nv10_fence_priv *priv = drm->fence; 109 110 nouveau_bo_wr32(priv->bo, 0, priv->sequence); 111 } 112 113 int 114 nv17_fence_create(struct nouveau_drm *drm) 115 { 116 struct nv10_fence_priv *priv; 117 int ret = 0; 118 119 priv = drm->fence = kzalloc(sizeof(*priv), GFP_KERNEL); 120 if (!priv) 121 return -ENOMEM; 122 123 priv->base.dtor = nv10_fence_destroy; 124 priv->base.resume = nv17_fence_resume; 125 priv->base.context_new = nv17_fence_context_new; 126 priv->base.context_del = nv10_fence_context_del; 127 spin_lock_init(&priv->lock); 128 129 ret = nouveau_bo_new(drm->dev, 4096, 0x1000, TTM_PL_FLAG_VRAM, 130 0, 0x0000, NULL, &priv->bo); 131 if (!ret) { 132 ret = nouveau_bo_pin(priv->bo, TTM_PL_FLAG_VRAM); 133 if (!ret) { 134 ret = nouveau_bo_map(priv->bo); 135 if (ret) 136 nouveau_bo_unpin(priv->bo); 137 } 138 if (ret) 139 nouveau_bo_ref(NULL, &priv->bo); 140 } 141 142 if (ret) { 143 nv10_fence_destroy(drm); 144 return ret; 145 } 146 147 nouveau_bo_wr32(priv->bo, 0x000, 0x00000000); 148 return ret; 149 } 150