mirror of https://gitee.com/openkylin/linux.git
drm/i915: Split out load time MMIO initialization
According to the new init phases scheme we should have a definite step in the init sequence where MMIO access is setup, so move the corresponding code to a separate function. This also has the benefit of making the error path cleaner both in the new function and in i915_driver_load()/unload(). No functional change. Suggested by Chris. Cc: Chris Wilson <chris@chris-wilson.co.uk> Signed-off-by: Imre Deak <imre.deak@intel.com> Reviewed-by: Chris Wilson <chris@chris-wilson.co.uk> Link: http://patchwork.freedesktop.org/patch/msgid/1458128348-15730-16-git-send-email-imre.deak@intel.com
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@ -1050,6 +1050,50 @@ static void i915_mmio_cleanup(struct drm_device *dev)
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pci_iounmap(dev->pdev, dev_priv->regs);
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pci_iounmap(dev->pdev, dev_priv->regs);
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}
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}
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/**
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* i915_driver_init_mmio - setup device MMIO
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* @dev_priv: device private
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*
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* Setup minimal device state necessary for MMIO accesses later in the
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* initialization sequence. The setup here should avoid any other device-wide
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* side effects or exposing the driver via kernel internal or user space
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* interfaces.
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*/
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static int i915_driver_init_mmio(struct drm_i915_private *dev_priv)
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{
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struct drm_device *dev = dev_priv->dev;
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int ret;
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if (i915_get_bridge_dev(dev))
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return -EIO;
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ret = i915_mmio_setup(dev);
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if (ret < 0)
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goto put_bridge;
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intel_uncore_init(dev);
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return 0;
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put_bridge:
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pci_dev_put(dev_priv->bridge_dev);
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return ret;
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}
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/**
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* i915_driver_cleanup_mmio - cleanup the setup done in i915_driver_init_mmio()
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* @dev_priv: device private
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*/
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static void i915_driver_cleanup_mmio(struct drm_i915_private *dev_priv)
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{
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struct drm_device *dev = dev_priv->dev;
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intel_uncore_fini(dev);
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i915_mmio_cleanup(dev);
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pci_dev_put(dev_priv->bridge_dev);
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}
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/**
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/**
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* i915_driver_load - setup chip and create an initial config
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* i915_driver_load - setup chip and create an initial config
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* @dev: DRM device
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* @dev: DRM device
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@ -1081,22 +1125,15 @@ int i915_driver_load(struct drm_device *dev, unsigned long flags)
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intel_runtime_pm_get(dev_priv);
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intel_runtime_pm_get(dev_priv);
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if (i915_get_bridge_dev(dev)) {
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ret = i915_driver_init_mmio(dev_priv);
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ret = -EIO;
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goto out_runtime_pm_put;
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}
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ret = i915_mmio_setup(dev);
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if (ret < 0)
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if (ret < 0)
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goto put_bridge;
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goto out_runtime_pm_put;
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intel_uncore_init(dev);
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intel_device_info_runtime_init(dev);
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intel_device_info_runtime_init(dev);
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ret = i915_gem_gtt_init(dev);
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ret = i915_gem_gtt_init(dev);
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if (ret)
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if (ret)
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goto out_uncore_fini;
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goto out_cleanup_mmio;
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/* WARNING: Apparently we must kick fbdev drivers before vgacon,
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/* WARNING: Apparently we must kick fbdev drivers before vgacon,
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* otherwise the vga fbdev driver falls over. */
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* otherwise the vga fbdev driver falls over. */
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@ -1218,11 +1255,8 @@ int i915_driver_load(struct drm_device *dev, unsigned long flags)
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io_mapping_free(dev_priv->gtt.mappable);
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io_mapping_free(dev_priv->gtt.mappable);
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out_gtt:
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out_gtt:
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i915_global_gtt_cleanup(dev);
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i915_global_gtt_cleanup(dev);
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out_uncore_fini:
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out_cleanup_mmio:
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intel_uncore_fini(dev);
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i915_driver_cleanup_mmio(dev_priv);
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i915_mmio_cleanup(dev);
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put_bridge:
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pci_dev_put(dev_priv->bridge_dev);
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out_runtime_pm_put:
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out_runtime_pm_put:
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intel_runtime_pm_put(dev_priv);
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intel_runtime_pm_put(dev_priv);
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i915_driver_cleanup_early(dev_priv);
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i915_driver_cleanup_early(dev_priv);
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@ -1303,10 +1337,7 @@ int i915_driver_unload(struct drm_device *dev)
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io_mapping_free(dev_priv->gtt.mappable);
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io_mapping_free(dev_priv->gtt.mappable);
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i915_global_gtt_cleanup(dev);
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i915_global_gtt_cleanup(dev);
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intel_uncore_fini(dev);
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i915_driver_cleanup_mmio(dev_priv);
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i915_mmio_cleanup(dev);
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pci_dev_put(dev_priv->bridge_dev);
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intel_display_power_put(dev_priv, POWER_DOMAIN_INIT);
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intel_display_power_put(dev_priv, POWER_DOMAIN_INIT);
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