From 12a30e267c162145df3c104d0f4aabff7bce56a5 Mon Sep 17 00:00:00 2001 From: Ben Skeggs Date: Mon, 18 Jul 2011 09:56:36 +1000 Subject: [PATCH] drm/nv40/gr: rewrite/split context takedown functions It's completely pointless to save the PGRAPH context when destroying a channel, so don't bother. This commit should also fix kernel.org bug 39422, where the DRM channel state was incorrectly being saved because we left PGRAPH FIFO access enabled while running the ctxprog. Signed-off-by: Ben Skeggs --- drivers/gpu/drm/nouveau/nv40_graph.c | 110 +++++---------------------- 1 file changed, 19 insertions(+), 91 deletions(-) diff --git a/drivers/gpu/drm/nouveau/nv40_graph.c b/drivers/gpu/drm/nouveau/nv40_graph.c index 5beb01b8ace..c7885e99093 100644 --- a/drivers/gpu/drm/nouveau/nv40_graph.c +++ b/drivers/gpu/drm/nouveau/nv40_graph.c @@ -35,89 +35,6 @@ struct nv40_graph_engine { u32 grctx_size; }; -static struct nouveau_channel * -nv40_graph_channel(struct drm_device *dev) -{ - struct drm_nouveau_private *dev_priv = dev->dev_private; - struct nouveau_gpuobj *grctx; - uint32_t inst; - int i; - - inst = nv_rd32(dev, NV40_PGRAPH_CTXCTL_CUR); - if (!(inst & NV40_PGRAPH_CTXCTL_CUR_LOADED)) - return NULL; - inst = (inst & NV40_PGRAPH_CTXCTL_CUR_INSTANCE) << 4; - - for (i = 0; i < dev_priv->engine.fifo.channels; i++) { - if (!dev_priv->channels.ptr[i]) - continue; - - grctx = dev_priv->channels.ptr[i]->engctx[NVOBJ_ENGINE_GR]; - if (grctx && grctx->pinst == inst) - return dev_priv->channels.ptr[i]; - } - - return NULL; -} - -static int -nv40_graph_transfer_context(struct drm_device *dev, uint32_t inst, int save) -{ - uint32_t old_cp, tv = 1000, tmp; - int i; - - old_cp = nv_rd32(dev, NV20_PGRAPH_CHANNEL_CTX_POINTER); - nv_wr32(dev, NV20_PGRAPH_CHANNEL_CTX_POINTER, inst); - - tmp = nv_rd32(dev, NV40_PGRAPH_CTXCTL_0310); - tmp |= save ? NV40_PGRAPH_CTXCTL_0310_XFER_SAVE : - NV40_PGRAPH_CTXCTL_0310_XFER_LOAD; - nv_wr32(dev, NV40_PGRAPH_CTXCTL_0310, tmp); - - tmp = nv_rd32(dev, NV40_PGRAPH_CTXCTL_0304); - tmp |= NV40_PGRAPH_CTXCTL_0304_XFER_CTX; - nv_wr32(dev, NV40_PGRAPH_CTXCTL_0304, tmp); - - nouveau_wait_for_idle(dev); - - for (i = 0; i < tv; i++) { - if (nv_rd32(dev, NV40_PGRAPH_CTXCTL_030C) == 0) - break; - } - - nv_wr32(dev, NV20_PGRAPH_CHANNEL_CTX_POINTER, old_cp); - - if (i == tv) { - uint32_t ucstat = nv_rd32(dev, NV40_PGRAPH_CTXCTL_UCODE_STAT); - NV_ERROR(dev, "Failed: Instance=0x%08x Save=%d\n", inst, save); - NV_ERROR(dev, "IP: 0x%02x, Opcode: 0x%08x\n", - ucstat >> NV40_PGRAPH_CTXCTL_UCODE_STAT_IP_SHIFT, - ucstat & NV40_PGRAPH_CTXCTL_UCODE_STAT_OP_MASK); - NV_ERROR(dev, "0x40030C = 0x%08x\n", - nv_rd32(dev, NV40_PGRAPH_CTXCTL_030C)); - return -EBUSY; - } - - return 0; -} - -static int -nv40_graph_unload_context(struct drm_device *dev) -{ - uint32_t inst; - int ret; - - inst = nv_rd32(dev, NV40_PGRAPH_CTXCTL_CUR); - if (!(inst & NV40_PGRAPH_CTXCTL_CUR_LOADED)) - return 0; - inst &= NV40_PGRAPH_CTXCTL_CUR_INSTANCE; - - ret = nv40_graph_transfer_context(dev, inst, 1); - - nv_wr32(dev, NV40_PGRAPH_CTXCTL_CUR, inst); - return ret; -} - static int nv40_graph_context_new(struct nouveau_channel *chan, int engine) { @@ -163,16 +80,16 @@ nv40_graph_context_del(struct nouveau_channel *chan, int engine) struct nouveau_gpuobj *grctx = chan->engctx[engine]; struct drm_device *dev = chan->dev; struct drm_nouveau_private *dev_priv = dev->dev_private; + u32 inst = 0x01000000 | (grctx->pinst >> 4); unsigned long flags; spin_lock_irqsave(&dev_priv->context_switch_lock, flags); - nv04_graph_fifo_access(dev, false); - - /* Unload the context if it's the currently active one */ - if (nv40_graph_channel(dev) == chan) - nv40_graph_unload_context(dev); - - nv04_graph_fifo_access(dev, true); + nv_mask(dev, 0x400720, 0x00000000, 0x00000001); + if (nv_rd32(dev, 0x40032c) == inst) + nv_mask(dev, 0x40032c, 0x01000000, 0x00000000); + if (nv_rd32(dev, 0x400330) == inst) + nv_mask(dev, 0x400330, 0x01000000, 0x00000000); + nv_mask(dev, 0x400720, 0x00000001, 0x00000001); spin_unlock_irqrestore(&dev_priv->context_switch_lock, flags); /* Free the context resources */ @@ -431,7 +348,18 @@ nv40_graph_init(struct drm_device *dev, int engine) static int nv40_graph_fini(struct drm_device *dev, int engine) { - nv40_graph_unload_context(dev); + u32 inst = nv_rd32(dev, 0x40032c); + if (inst & 0x01000000) { + nv_wr32(dev, 0x400720, 0x00000000); + nv_wr32(dev, 0x400784, inst); + nv_mask(dev, 0x400310, 0x00000020, 0x00000020); + nv_mask(dev, 0x400304, 0x00000001, 0x00000001); + if (!nv_wait(dev, 0x400300, 0x00000001, 0x00000000)) { + u32 insn = nv_rd32(dev, 0x400308); + NV_ERROR(dev, "PGRAPH: ctxprog timeout 0x%08x\n", insn); + } + nv_mask(dev, 0x40032c, 0x01000000, 0x00000000); + } return 0; } -- 2.46.0