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Commit f28cea45 authored by Imre Deak's avatar Imre Deak
Browse files

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: default avatarImre Deak <imre.deak@intel.com>
Reviewed-by: default avatarChris Wilson <chris@chris-wilson.co.uk>
Link: http://patchwork.freedesktop.org/patch/msgid/1458128348-15730-16-git-send-email-imre.deak@intel.com
parent 5d7a6eef

drivers/gpu/drm/i915/i915_dma.c

+50 −19
Original line number Diff line number Diff line
@@ -1050,6 +1050,50 @@ static void i915_mmio_cleanup(struct drm_device *dev) 
	pci_iounmap(dev->pdev, dev_priv->regs);

}



/**

 * i915_driver_init_mmio - setup device MMIO

 * @dev_priv: device private

 *

 * Setup minimal device state necessary for MMIO accesses later in the

 * initialization sequence. The setup here should avoid any other device-wide

 * side effects or exposing the driver via kernel internal or user space

 * interfaces.

 */

static int i915_driver_init_mmio(struct drm_i915_private *dev_priv)

{

	struct drm_device *dev = dev_priv->dev;

	int ret;



	if (i915_get_bridge_dev(dev))

		return -EIO;



	ret = i915_mmio_setup(dev);

	if (ret < 0)

		goto put_bridge;



	intel_uncore_init(dev);



	return 0;



put_bridge:

	pci_dev_put(dev_priv->bridge_dev);



	return ret;

}



/**

 * i915_driver_cleanup_mmio - cleanup the setup done in i915_driver_init_mmio()

 * @dev_priv: device private

 */

static void i915_driver_cleanup_mmio(struct drm_i915_private *dev_priv)

{

	struct drm_device *dev = dev_priv->dev;



	intel_uncore_fini(dev);

	i915_mmio_cleanup(dev);

	pci_dev_put(dev_priv->bridge_dev);

}



/**

 * i915_driver_load - setup chip and create an initial config

 * @dev: DRM device
@@ -1081,22 +1125,15 @@ int i915_driver_load(struct drm_device *dev, unsigned long flags) 


	intel_runtime_pm_get(dev_priv);



	if (i915_get_bridge_dev(dev)) {

		ret = -EIO;

		goto out_runtime_pm_put;

	}



	ret = i915_mmio_setup(dev);

	ret = i915_driver_init_mmio(dev_priv);

	if (ret < 0)

		goto put_bridge;



	intel_uncore_init(dev);

		goto out_runtime_pm_put;



	intel_device_info_runtime_init(dev);



	ret = i915_gem_gtt_init(dev);

	if (ret)

		goto out_uncore_fini;

		goto out_cleanup_mmio;



	/* WARNING: Apparently we must kick fbdev drivers before vgacon,

	 * otherwise the vga fbdev driver falls over. */
@@ -1218,11 +1255,8 @@ int i915_driver_load(struct drm_device *dev, unsigned long flags) 
	io_mapping_free(dev_priv->gtt.mappable);

out_gtt:

	i915_global_gtt_cleanup(dev);

out_uncore_fini:

	intel_uncore_fini(dev);

	i915_mmio_cleanup(dev);

put_bridge:

	pci_dev_put(dev_priv->bridge_dev);

out_cleanup_mmio:

	i915_driver_cleanup_mmio(dev_priv);

out_runtime_pm_put:

	intel_runtime_pm_put(dev_priv);

	i915_driver_cleanup_early(dev_priv);
@@ -1303,10 +1337,7 @@ int i915_driver_unload(struct drm_device *dev) 
	io_mapping_free(dev_priv->gtt.mappable);

	i915_global_gtt_cleanup(dev);



	intel_uncore_fini(dev);

	i915_mmio_cleanup(dev);



	pci_dev_put(dev_priv->bridge_dev);

	i915_driver_cleanup_mmio(dev_priv);



	intel_display_power_put(dev_priv, POWER_DOMAIN_INIT);