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 <nvif/os.h> 26 #include <nvif/class.h> 27 #include <nvif/cl0002.h> 28 29 #include "nouveau_drv.h" 30 #include "nouveau_dma.h" 31 #include "nv10_fence.h" 32 33 int 34 nv17_fence_sync(struct nouveau_fence *fence, 35 struct nouveau_channel *prev, struct nouveau_channel *chan) 36 { 37 struct nouveau_cli *cli = (void *)prev->user.client; 38 struct nv10_fence_priv *priv = chan->drm->fence; 39 struct nv10_fence_chan *fctx = chan->fence; 40 u32 value; 41 int ret; 42 43 if (!mutex_trylock(&cli->mutex)) 44 return -EBUSY; 45 46 spin_lock(&priv->lock); 47 value = priv->sequence; 48 priv->sequence += 2; 49 spin_unlock(&priv->lock); 50 51 ret = RING_SPACE(prev, 5); 52 if (!ret) { 53 BEGIN_NV04(prev, 0, NV11_SUBCHAN_DMA_SEMAPHORE, 4); 54 OUT_RING (prev, fctx->sema.handle); 55 OUT_RING (prev, 0); 56 OUT_RING (prev, value + 0); 57 OUT_RING (prev, value + 1); 58 FIRE_RING (prev); 59 } 60 61 if (!ret && !(ret = RING_SPACE(chan, 5))) { 62 BEGIN_NV04(chan, 0, NV11_SUBCHAN_DMA_SEMAPHORE, 4); 63 OUT_RING (chan, fctx->sema.handle); 64 OUT_RING (chan, 0); 65 OUT_RING (chan, value + 1); 66 OUT_RING (chan, value + 2); 67 FIRE_RING (chan); 68 } 69 70 mutex_unlock(&cli->mutex); 71 return 0; 72 } 73 74 static int 75 nv17_fence_context_new(struct nouveau_channel *chan) 76 { 77 struct nv10_fence_priv *priv = chan->drm->fence; 78 struct nv10_fence_chan *fctx; 79 struct ttm_mem_reg *reg = &priv->bo->bo.mem; 80 u32 start = reg->start * PAGE_SIZE; 81 u32 limit = start + reg->size - 1; 82 int ret = 0; 83 84 fctx = chan->fence = kzalloc(sizeof(*fctx), GFP_KERNEL); 85 if (!fctx) 86 return -ENOMEM; 87 88 nouveau_fence_context_new(chan, &fctx->base); 89 fctx->base.emit = nv10_fence_emit; 90 fctx->base.read = nv10_fence_read; 91 fctx->base.sync = nv17_fence_sync; 92 93 ret = nvif_object_init(&chan->user, NvSema, NV_DMA_FROM_MEMORY, 94 &(struct nv_dma_v0) { 95 .target = NV_DMA_V0_TARGET_VRAM, 96 .access = NV_DMA_V0_ACCESS_RDWR, 97 .start = start, 98 .limit = limit, 99 }, sizeof(struct nv_dma_v0), 100 &fctx->sema); 101 if (ret) 102 nv10_fence_context_del(chan); 103 return ret; 104 } 105 106 void 107 nv17_fence_resume(struct nouveau_drm *drm) 108 { 109 struct nv10_fence_priv *priv = drm->fence; 110 111 nouveau_bo_wr32(priv->bo, 0, priv->sequence); 112 } 113 114 int 115 nv17_fence_create(struct nouveau_drm *drm) 116 { 117 struct nv10_fence_priv *priv; 118 int ret = 0; 119 120 priv = drm->fence = kzalloc(sizeof(*priv), GFP_KERNEL); 121 if (!priv) 122 return -ENOMEM; 123 124 priv->base.dtor = nv10_fence_destroy; 125 priv->base.resume = nv17_fence_resume; 126 priv->base.context_new = nv17_fence_context_new; 127 priv->base.context_del = nv10_fence_context_del; 128 spin_lock_init(&priv->lock); 129 130 ret = nouveau_bo_new(&drm->client, 4096, 0x1000, TTM_PL_FLAG_VRAM, 131 0, 0x0000, NULL, NULL, &priv->bo); 132 if (!ret) { 133 ret = nouveau_bo_pin(priv->bo, TTM_PL_FLAG_VRAM, false); 134 if (!ret) { 135 ret = nouveau_bo_map(priv->bo); 136 if (ret) 137 nouveau_bo_unpin(priv->bo); 138 } 139 if (ret) 140 nouveau_bo_ref(NULL, &priv->bo); 141 } 142 143 if (ret) { 144 nv10_fence_destroy(drm); 145 return ret; 146 } 147 148 nouveau_bo_wr32(priv->bo, 0x000, 0x00000000); 149 return ret; 150 } 151