From 0735f62e116fae1e4f36237a97de28e8a56b4c2c Mon Sep 17 00:00:00 2001 From: Ben Skeggs Date: Wed, 16 Dec 2009 14:28:55 +1000 Subject: [PATCH] drm/nouveau: prevent all channel creation if accel not available Previously, if there was no firmware available, the DRM would just disable channel creation from userspace, but still use a single channel for its own purposes. With a bit of care it should actually be possible to do this, due to the DRM's very limited use of the engine. It currently doesn't work correctly however, resulting in corrupted fbcon and hangs on a number of cards. Signed-off-by: Ben Skeggs --- drivers/gpu/drm/nouveau/nouveau_bo.c | 8 ++-- drivers/gpu/drm/nouveau/nouveau_fbcon.c | 20 ++++---- drivers/gpu/drm/nouveau/nouveau_state.c | 84 ++++++++++++++++++++------------- 3 files changed, 64 insertions(+), 48 deletions(-) diff --git a/drivers/gpu/drm/nouveau/nouveau_bo.c b/drivers/gpu/drm/nouveau/nouveau_bo.c index e9f0190..2f5d470 100644 --- a/drivers/gpu/drm/nouveau/nouveau_bo.c +++ b/drivers/gpu/drm/nouveau/nouveau_bo.c @@ -461,11 +461,8 @@ nouveau_bo_move_m2mf(struct ttm_buffer_object *bo, int evict, int no_wait, int ret; chan = nvbo->channel; - if (!chan || nvbo->tile_flags || nvbo->no_vm) { + if (!chan || nvbo->tile_flags || nvbo->no_vm) chan = dev_priv->channel; - if (!chan) - return -EINVAL; - } src_offset = old_mem->mm_node->start << PAGE_SHIFT; dst_offset = new_mem->mm_node->start << PAGE_SHIFT; @@ -631,7 +628,8 @@ nouveau_bo_move(struct ttm_buffer_object *bo, bool evict, bool intr, return ret; } - if (dev_priv->init_state != NOUVEAU_CARD_INIT_DONE) + if (dev_priv->init_state != NOUVEAU_CARD_INIT_DONE || + !dev_priv->channel) return ttm_bo_move_memcpy(bo, evict, no_wait, new_mem); if (old_mem->mem_type == TTM_PL_SYSTEM && !bo->ttm) { diff --git a/drivers/gpu/drm/nouveau/nouveau_fbcon.c b/drivers/gpu/drm/nouveau/nouveau_fbcon.c index 489d492..84af25c 100644 --- a/drivers/gpu/drm/nouveau/nouveau_fbcon.c +++ b/drivers/gpu/drm/nouveau/nouveau_fbcon.c @@ -58,7 +58,7 @@ nouveau_fbcon_sync(struct fb_info *info) struct nouveau_channel *chan = dev_priv->channel; int ret, i; - if (!chan->accel_done || + if (!chan || !chan->accel_done || info->state != FBINFO_STATE_RUNNING || info->flags & FBINFO_HWACCEL_DISABLED) return 0; @@ -318,14 +318,16 @@ nouveau_fbcon_create(struct drm_device *dev, uint32_t fb_width, par->nouveau_fb = nouveau_fb; par->dev = dev; - switch (dev_priv->card_type) { - case NV_50: - nv50_fbcon_accel_init(info); - break; - default: - nv04_fbcon_accel_init(info); - break; - }; + if (dev_priv->channel) { + switch (dev_priv->card_type) { + case NV_50: + nv50_fbcon_accel_init(info); + break; + default: + nv04_fbcon_accel_init(info); + break; + }; + } nouveau_fbcon_zfill(dev); diff --git a/drivers/gpu/drm/nouveau/nouveau_state.c b/drivers/gpu/drm/nouveau/nouveau_state.c index 9fc5824..e76ec2d 100644 --- a/drivers/gpu/drm/nouveau/nouveau_state.c +++ b/drivers/gpu/drm/nouveau/nouveau_state.c @@ -299,12 +299,57 @@ nouveau_vga_set_decode(void *priv, bool state) return VGA_RSRC_NORMAL_IO | VGA_RSRC_NORMAL_MEM; } +static int +nouveau_card_init_channel(struct drm_device *dev) +{ + struct drm_nouveau_private *dev_priv = dev->dev_private; + struct nouveau_gpuobj *gpuobj; + int ret; + + ret = nouveau_channel_alloc(dev, &dev_priv->channel, + (struct drm_file *)-2, + NvDmaFB, NvDmaTT); + if (ret) + return ret; + + gpuobj = NULL; + ret = nouveau_gpuobj_dma_new(dev_priv->channel, NV_CLASS_DMA_IN_MEMORY, + 0, nouveau_mem_fb_amount(dev), + NV_DMA_ACCESS_RW, NV_DMA_TARGET_VIDMEM, + &gpuobj); + if (ret) + goto out_err; + + ret = nouveau_gpuobj_ref_add(dev, dev_priv->channel, NvDmaVRAM, + gpuobj, NULL); + if (ret) + goto out_err; + + gpuobj = NULL; + ret = nouveau_gpuobj_gart_dma_new(dev_priv->channel, 0, + dev_priv->gart_info.aper_size, + NV_DMA_ACCESS_RW, &gpuobj, NULL); + if (ret) + goto out_err; + + ret = nouveau_gpuobj_ref_add(dev, dev_priv->channel, NvDmaGART, + gpuobj, NULL); + if (ret) + goto out_err; + + return 0; +out_err: + nouveau_gpuobj_del(dev, &gpuobj); + nouveau_channel_free(dev_priv->channel); + dev_priv->channel = NULL; + return ret; +} + int nouveau_card_init(struct drm_device *dev) { struct drm_nouveau_private *dev_priv = dev->dev_private; struct nouveau_engine *engine; - struct nouveau_gpuobj *gpuobj; int ret; NV_DEBUG(dev, "prev state = %d\n", dev_priv->init_state); @@ -387,39 +432,10 @@ nouveau_card_init(struct drm_device *dev) /* what about PVIDEO/PCRTC/PRAMDAC etc? */ - ret = nouveau_channel_alloc(dev, &dev_priv->channel, - (struct drm_file *)-2, - NvDmaFB, NvDmaTT); - if (ret) - goto out_irq; - - gpuobj = NULL; - ret = nouveau_gpuobj_dma_new(dev_priv->channel, NV_CLASS_DMA_IN_MEMORY, - 0, nouveau_mem_fb_amount(dev), - NV_DMA_ACCESS_RW, NV_DMA_TARGET_VIDMEM, - &gpuobj); - if (ret) - goto out_irq; - - ret = nouveau_gpuobj_ref_add(dev, dev_priv->channel, NvDmaVRAM, - gpuobj, NULL); - if (ret) { - nouveau_gpuobj_del(dev, &gpuobj); - goto out_irq; - } - - gpuobj = NULL; - ret = nouveau_gpuobj_gart_dma_new(dev_priv->channel, 0, - dev_priv->gart_info.aper_size, - NV_DMA_ACCESS_RW, &gpuobj, NULL); - if (ret) - goto out_irq; - - ret = nouveau_gpuobj_ref_add(dev, dev_priv->channel, NvDmaGART, - gpuobj, NULL); - if (ret) { - nouveau_gpuobj_del(dev, &gpuobj); - goto out_irq; + if (!engine->graph.accel_blocked) { + ret = nouveau_card_init_channel(dev); + if (ret) + goto out_irq; } if (drm_core_check_feature(dev, DRIVER_MODESET)) { -- 2.7.4