diff options
Diffstat (limited to 'drivers/gpu/drm/nouveau/nouveau_dma.c')
| -rw-r--r-- | drivers/gpu/drm/nouveau/nouveau_dma.c | 34 |
1 files changed, 27 insertions, 7 deletions
diff --git a/drivers/gpu/drm/nouveau/nouveau_dma.c b/drivers/gpu/drm/nouveau/nouveau_dma.c index 7035536..7afbe8b 100644 --- a/drivers/gpu/drm/nouveau/nouveau_dma.c +++ b/drivers/gpu/drm/nouveau/nouveau_dma.c @@ -29,12 +29,22 @@ #include "nouveau_drv.h" #include "nouveau_dma.h" +void +nouveau_dma_pre_init(struct nouveau_channel *chan) +{ + chan->dma.max = (chan->pushbuf_bo->bo.mem.size >> 2) - 2; + chan->dma.put = 0; + chan->dma.cur = chan->dma.put; + chan->dma.free = chan->dma.max - chan->dma.cur; +} + int nouveau_dma_init(struct nouveau_channel *chan) { struct drm_device *dev = chan->dev; struct drm_nouveau_private *dev_priv = dev->dev_private; struct nouveau_gpuobj *m2mf = NULL; + struct nouveau_gpuobj *nvsw = NULL; int ret, i; /* Create NV_MEMORY_TO_MEMORY_FORMAT for buffer moves */ @@ -47,6 +57,15 @@ nouveau_dma_init(struct nouveau_channel *chan) if (ret) return ret; + /* Create an NV_SW object for various sync purposes */ + ret = nouveau_gpuobj_sw_new(chan, NV_SW, &nvsw); + if (ret) + return ret; + + ret = nouveau_gpuobj_ref_add(dev, chan, NvSw, nvsw, NULL); + if (ret) + return ret; + /* NV_MEMORY_TO_MEMORY_FORMAT requires a notifier object */ ret = nouveau_notifier_alloc(chan, NvNotify0, 32, &chan->m2mf_ntfy); if (ret) @@ -64,12 +83,6 @@ nouveau_dma_init(struct nouveau_channel *chan) return ret; } - /* Initialise DMA vars */ - chan->dma.max = (chan->pushbuf_bo->bo.mem.size >> 2) - 2; - chan->dma.put = 0; - chan->dma.cur = chan->dma.put; - chan->dma.free = chan->dma.max - chan->dma.cur; - /* Insert NOPS for NOUVEAU_DMA_SKIPS */ ret = RING_SPACE(chan, NOUVEAU_DMA_SKIPS); if (ret) @@ -87,6 +100,13 @@ nouveau_dma_init(struct nouveau_channel *chan) BEGIN_RING(chan, NvSubM2MF, NV_MEMORY_TO_MEMORY_FORMAT_DMA_NOTIFY, 1); OUT_RING(chan, NvNotify0); + /* Initialise NV_SW */ + ret = RING_SPACE(chan, 2); + if (ret) + return ret; + BEGIN_RING(chan, NvSubSw, 0, 1); + OUT_RING(chan, NvSw); + /* Sit back and pray the channel works.. */ FIRE_RING(chan); @@ -113,7 +133,7 @@ READ_GET(struct nouveau_channel *chan, uint32_t *get) val = nvchan_rd32(chan, chan->user_get); if (val < chan->pushbuf_base || - val >= chan->pushbuf_base + chan->pushbuf_bo->bo.mem.size) { + val > chan->pushbuf_base + (chan->dma.max << 2)) { /* meaningless to dma_wait() except to know whether the * GPU has stalled or not */ |