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drm/nouveau: prevent all channel creation if accel not available

Browse source 
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 <bskeggs@redhat.com>
This commit is contained in:
Ben Skeggs 2009-12-16 14:28:55 +10:00
parent 3c8868d3db
commit 0735f62e11
3 changed files with 64 additions and 48 deletions
Show stats Download patch file Download diff file Expand all files Collapse all files

8
drivers/gpu/drm/nouveau/nouveau_bo.c
View file

@ -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) {

20
drivers/gpu/drm/nouveau/nouveau_fbcon.c
View file

@ -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);

84
drivers/gpu/drm/nouveau/nouveau_state.c
View file

@ -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)) {