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drm/i915: Map registers before GTT init

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This will allow us to read/write registers in GTT init.

Signed-off-by: Ben Widawsky <ben@bwidawsk.net>
[danvet: Fix up error handling. We really should look into devres for
this stuff ...]
Signed-off-by: Daniel Vetter <daniel.vetter@ffwll.ch>
This commit is contained in:
Ben Widawsky 2013-04-08 18:43:49 -07:00 committed by Daniel Vetter
parent e7c2b58b70
commit 1e1bd0fd4e
1 changed files with 23 additions and 24 deletions
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47
drivers/gpu/drm/i915/i915_dma.c
View file

@ -1518,6 +1518,28 @@ int i915_driver_load(struct drm_device *dev, unsigned long flags)
goto free_priv;
}
mmio_bar = IS_GEN2(dev) ? 1 : 0;
/* Before gen4, the registers and the GTT are behind different BARs.
* However, from gen4 onwards, the registers and the GTT are shared
* in the same BAR, so we want to restrict this ioremap from
* clobbering the GTT which we want ioremap_wc instead. Fortunately,
* the register BAR remains the same size for all the earlier
* generations up to Ironlake.
*/
if (info->gen < 5)
mmio_size = 512*1024;
else
mmio_size = 2*1024*1024;
dev_priv->regs = pci_iomap(dev->pdev, mmio_bar, mmio_size);
if (!dev_priv->regs) {
DRM_ERROR("failed to map registers\n");
ret = -EIO;
goto put_bridge;
}
intel_early_sanitize_regs(dev);
ret = i915_gem_gtt_init(dev);
if (ret)
goto put_bridge;
@ -1542,28 +1564,6 @@ int i915_driver_load(struct drm_device *dev, unsigned long flags)
if (IS_BROADWATER(dev) || IS_CRESTLINE(dev))
dma_set_coherent_mask(&dev->pdev->dev, DMA_BIT_MASK(32));
mmio_bar = IS_GEN2(dev) ? 1 : 0;
/* Before gen4, the registers and the GTT are behind different BARs.
* However, from gen4 onwards, the registers and the GTT are shared
* in the same BAR, so we want to restrict this ioremap from
* clobbering the GTT which we want ioremap_wc instead. Fortunately,
* the register BAR remains the same size for all the earlier
* generations up to Ironlake.
*/
if (info->gen < 5)
mmio_size = 512*1024;
else
mmio_size = 2*1024*1024;
dev_priv->regs = pci_iomap(dev->pdev, mmio_bar, mmio_size);
if (!dev_priv->regs) {
DRM_ERROR("failed to map registers\n");
ret = -EIO;
goto put_gmch;
}
intel_early_sanitize_regs(dev);
aperture_size = dev_priv->gtt.mappable_end;
dev_priv->gtt.mappable =
@ -1686,10 +1686,9 @@ out_mtrrfree:
dev_priv->mm.gtt_mtrr = -1;
}
io_mapping_free(dev_priv->gtt.mappable);
dev_priv->gtt.gtt_remove(dev);
out_rmmap:
pci_iounmap(dev->pdev, dev_priv->regs);
put_gmch:
dev_priv->gtt.gtt_remove(dev);
put_bridge:
pci_dev_put(dev_priv->bridge_dev);
free_priv: