From: Ben Skeggs Date: Fri, 22 Oct 2010 00:26:24 +0000 (+1000) Subject: drm/nv50: implement possible workaround for NV86 PGRAPH TLB flush hang X-Git-Tag: v2.6.37-rc3~8^2~3^2~9 X-Git-Url: https://git.openpandora.org/cgi-bin/gitweb.cgi?p=pandora-kernel.git;a=commitdiff_plain;h=56ac7475350ee646f5f7316abcdf65d3be94da1c drm/nv50: implement possible workaround for NV86 PGRAPH TLB flush hang Signed-off-by: Ben Skeggs --- diff --git a/drivers/gpu/drm/nouveau/nouveau_drv.h b/drivers/gpu/drm/nouveau/nouveau_drv.h index 60a54fae90c1..10a8d4e78e58 100644 --- a/drivers/gpu/drm/nouveau/nouveau_drv.h +++ b/drivers/gpu/drm/nouveau/nouveau_drv.h @@ -307,6 +307,7 @@ struct nouveau_fifo_engine { void (*destroy_context)(struct nouveau_channel *); int (*load_context)(struct nouveau_channel *); int (*unload_context)(struct drm_device *); + void (*tlb_flush)(struct drm_device *dev); }; struct nouveau_pgraph_object_method { @@ -339,6 +340,7 @@ struct nouveau_pgraph_engine { void (*destroy_context)(struct nouveau_channel *); int (*load_context)(struct nouveau_channel *); int (*unload_context)(struct drm_device *); + void (*tlb_flush)(struct drm_device *dev); void (*set_region_tiling)(struct drm_device *dev, int i, uint32_t addr, uint32_t size, uint32_t pitch); @@ -1014,6 +1016,7 @@ extern int nv50_fifo_create_context(struct nouveau_channel *); extern void nv50_fifo_destroy_context(struct nouveau_channel *); extern int nv50_fifo_load_context(struct nouveau_channel *); extern int nv50_fifo_unload_context(struct drm_device *); +extern void nv50_fifo_tlb_flush(struct drm_device *dev); /* nvc0_fifo.c */ extern int nvc0_fifo_init(struct drm_device *); @@ -1091,6 +1094,8 @@ extern int nv50_graph_load_context(struct nouveau_channel *); extern int nv50_graph_unload_context(struct drm_device *); extern void nv50_graph_context_switch(struct drm_device *); extern int nv50_grctx_init(struct nouveau_grctx *); +extern void nv50_graph_tlb_flush(struct drm_device *dev); +extern void nv86_graph_tlb_flush(struct drm_device *dev); /* nvc0_graph.c */ extern int nvc0_graph_init(struct drm_device *); diff --git a/drivers/gpu/drm/nouveau/nouveau_mem.c b/drivers/gpu/drm/nouveau/nouveau_mem.c index 1165c3e68200..ac3bec024fd5 100644 --- a/drivers/gpu/drm/nouveau/nouveau_mem.c +++ b/drivers/gpu/drm/nouveau/nouveau_mem.c @@ -175,11 +175,10 @@ nv50_mem_vm_bind_linear(struct drm_device *dev, uint64_t virt, uint32_t size, } } } - dev_priv->engine.instmem.flush(dev); - nv50_vm_flush(dev, 5); - nv50_vm_flush(dev, 0); - nv50_vm_flush(dev, 4); + dev_priv->engine.instmem.flush(dev); + dev_priv->engine.fifo.tlb_flush(dev); + dev_priv->engine.graph.tlb_flush(dev); nv50_vm_flush(dev, 6); return 0; } @@ -209,11 +208,10 @@ nv50_mem_vm_unbind(struct drm_device *dev, uint64_t virt, uint32_t size) pte++; } } - dev_priv->engine.instmem.flush(dev); - nv50_vm_flush(dev, 5); - nv50_vm_flush(dev, 0); - nv50_vm_flush(dev, 4); + dev_priv->engine.instmem.flush(dev); + dev_priv->engine.fifo.tlb_flush(dev); + dev_priv->engine.graph.tlb_flush(dev); nv50_vm_flush(dev, 6); } diff --git a/drivers/gpu/drm/nouveau/nouveau_sgdma.c b/drivers/gpu/drm/nouveau/nouveau_sgdma.c index 15f358404645..0b309c1cc3d7 100644 --- a/drivers/gpu/drm/nouveau/nouveau_sgdma.c +++ b/drivers/gpu/drm/nouveau/nouveau_sgdma.c @@ -120,8 +120,8 @@ nouveau_sgdma_bind(struct ttm_backend *be, struct ttm_mem_reg *mem) dev_priv->engine.instmem.flush(nvbe->dev); if (dev_priv->card_type == NV_50) { - nv50_vm_flush(dev, 5); /* PGRAPH */ - nv50_vm_flush(dev, 0); /* PFIFO */ + dev_priv->engine.fifo.tlb_flush(dev); + dev_priv->engine.graph.tlb_flush(dev); } nvbe->bound = true; @@ -162,8 +162,8 @@ nouveau_sgdma_unbind(struct ttm_backend *be) dev_priv->engine.instmem.flush(nvbe->dev); if (dev_priv->card_type == NV_50) { - nv50_vm_flush(dev, 5); - nv50_vm_flush(dev, 0); + dev_priv->engine.fifo.tlb_flush(dev); + dev_priv->engine.graph.tlb_flush(dev); } nvbe->bound = false; diff --git a/drivers/gpu/drm/nouveau/nouveau_state.c b/drivers/gpu/drm/nouveau/nouveau_state.c index ea3452194cd6..049f755567e5 100644 --- a/drivers/gpu/drm/nouveau/nouveau_state.c +++ b/drivers/gpu/drm/nouveau/nouveau_state.c @@ -354,6 +354,15 @@ static int nouveau_init_engine_ptrs(struct drm_device *dev) engine->graph.destroy_context = nv50_graph_destroy_context; engine->graph.load_context = nv50_graph_load_context; engine->graph.unload_context = nv50_graph_unload_context; + if (dev_priv->chipset != 0x86) + engine->graph.tlb_flush = nv50_graph_tlb_flush; + else { + /* from what i can see nvidia do this on every + * pre-NVA3 board except NVAC, but, we've only + * ever seen problems on NV86 + */ + engine->graph.tlb_flush = nv86_graph_tlb_flush; + } engine->fifo.channels = 128; engine->fifo.init = nv50_fifo_init; engine->fifo.takedown = nv50_fifo_takedown; @@ -365,6 +374,7 @@ static int nouveau_init_engine_ptrs(struct drm_device *dev) engine->fifo.destroy_context = nv50_fifo_destroy_context; engine->fifo.load_context = nv50_fifo_load_context; engine->fifo.unload_context = nv50_fifo_unload_context; + engine->fifo.tlb_flush = nv50_fifo_tlb_flush; engine->display.early_init = nv50_display_early_init; engine->display.late_takedown = nv50_display_late_takedown; engine->display.create = nv50_display_create; diff --git a/drivers/gpu/drm/nouveau/nv50_fifo.c b/drivers/gpu/drm/nouveau/nv50_fifo.c index a46a961102f3..1da65bd60c10 100644 --- a/drivers/gpu/drm/nouveau/nv50_fifo.c +++ b/drivers/gpu/drm/nouveau/nv50_fifo.c @@ -464,3 +464,8 @@ nv50_fifo_unload_context(struct drm_device *dev) return 0; } +void +nv50_fifo_tlb_flush(struct drm_device *dev) +{ + nv50_vm_flush(dev, 5); +} diff --git a/drivers/gpu/drm/nouveau/nv50_graph.c b/drivers/gpu/drm/nouveau/nv50_graph.c index cbf5ae2f67d4..8b669d0af610 100644 --- a/drivers/gpu/drm/nouveau/nv50_graph.c +++ b/drivers/gpu/drm/nouveau/nv50_graph.c @@ -402,3 +402,55 @@ struct nouveau_pgraph_object_class nv50_graph_grclass[] = { { 0x8597, false, NULL }, /* tesla (nva3, nva5, nva8) */ {} }; + +void +nv50_graph_tlb_flush(struct drm_device *dev) +{ + nv50_vm_flush(dev, 0); +} + +void +nv86_graph_tlb_flush(struct drm_device *dev) +{ + struct drm_nouveau_private *dev_priv = dev->dev_private; + struct nouveau_timer_engine *ptimer = &dev_priv->engine.timer; + bool idle, timeout = false; + unsigned long flags; + u64 start; + u32 tmp; + + spin_lock_irqsave(&dev_priv->context_switch_lock, flags); + nv_mask(dev, 0x400500, 0x00000001, 0x00000000); + + start = ptimer->read(dev); + do { + idle = true; + + for (tmp = nv_rd32(dev, 0x400380); tmp && idle; tmp >>= 3) { + if ((tmp & 7) == 1) + idle = false; + } + + for (tmp = nv_rd32(dev, 0x400384); tmp && idle; tmp >>= 3) { + if ((tmp & 7) == 1) + idle = false; + } + + for (tmp = nv_rd32(dev, 0x400388); tmp && idle; tmp >>= 3) { + if ((tmp & 7) == 1) + idle = false; + } + } while (!idle && !(timeout = ptimer->read(dev) - start > 2000000000)); + + if (timeout) { + NV_ERROR(dev, "PGRAPH TLB flush idle timeout fail: " + "0x%08x 0x%08x 0x%08x 0x%08x\n", + nv_rd32(dev, 0x400700), nv_rd32(dev, 0x400380), + nv_rd32(dev, 0x400384), nv_rd32(dev, 0x400388)); + } + + nv50_vm_flush(dev, 0); + + nv_mask(dev, 0x400500, 0x00000001, 0x00000001); + spin_unlock_irqrestore(&dev_priv->context_switch_lock, flags); +} diff --git a/drivers/gpu/drm/nouveau/nv50_instmem.c b/drivers/gpu/drm/nouveau/nv50_instmem.c index a53fc974332b..b773229b7647 100644 --- a/drivers/gpu/drm/nouveau/nv50_instmem.c +++ b/drivers/gpu/drm/nouveau/nv50_instmem.c @@ -402,7 +402,6 @@ nv50_instmem_bind(struct drm_device *dev, struct nouveau_gpuobj *gpuobj) } dev_priv->engine.instmem.flush(dev); - nv50_vm_flush(dev, 4); nv50_vm_flush(dev, 6); gpuobj->im_bound = 1;