From 5d7a6eefc3b025725dd1b5a643e90ce068e9dbd4 Mon Sep 17 00:00:00 2001 From: Imre Deak Date: Wed, 16 Mar 2016 13:39:03 +0200 Subject: [PATCH] drm/i915: Split out load time early initialization According to the new init phases scheme we should initialize "SW-only" state not requiring accessing the device as the very first step, so that the reasoning about dependencies of later steps becomes easier. So move these init steps into a separate function. This also has the benefit of making the error path cleaner both in the new function and int i915_driver_load()/unload(). No functional change. Suggested by Chris. CC: Chris Wilson Signed-off-by: Imre Deak Reviewed-by: Chris Wilson Link: http://patchwork.freedesktop.org/patch/msgid/1458128348-15730-15-git-send-email-imre.deak@intel.com --- drivers/gpu/drm/i915/i915_dma.c | 130 ++++++++++++++++++++------------ 1 file changed, 81 insertions(+), 49 deletions(-) diff --git a/drivers/gpu/drm/i915/i915_dma.c b/drivers/gpu/drm/i915/i915_dma.c index 7618a3f4c21f..182770dee746 100644 --- a/drivers/gpu/drm/i915/i915_dma.c +++ b/drivers/gpu/drm/i915/i915_dma.c @@ -933,6 +933,83 @@ static void i915_workqueues_cleanup(struct drm_i915_private *dev_priv) destroy_workqueue(dev_priv->wq); } +/** + * i915_driver_init_early - setup state not requiring device access + * @dev_priv: device private + * + * Initialize everything that is a "SW-only" state, that is state not + * requiring accessing the device or exposing the driver via kernel internal + * or userspace interfaces. Example steps belonging here: lock initialization, + * system memory allocation, setting up device specific attributes and + * function hooks not requiring accessing the device. + */ +static int i915_driver_init_early(struct drm_i915_private *dev_priv, + struct drm_device *dev, + struct intel_device_info *info) +{ + struct intel_device_info *device_info; + int ret = 0; + + dev_priv->dev = dev; + + /* Setup the write-once "constant" device info */ + device_info = (struct intel_device_info *)&dev_priv->info; + memcpy(device_info, info, sizeof(dev_priv->info)); + device_info->device_id = dev->pdev->device; + + spin_lock_init(&dev_priv->irq_lock); + spin_lock_init(&dev_priv->gpu_error.lock); + mutex_init(&dev_priv->backlight_lock); + spin_lock_init(&dev_priv->uncore.lock); + spin_lock_init(&dev_priv->mm.object_stat_lock); + spin_lock_init(&dev_priv->mmio_flip_lock); + mutex_init(&dev_priv->sb_lock); + mutex_init(&dev_priv->modeset_restore_lock); + mutex_init(&dev_priv->av_mutex); + mutex_init(&dev_priv->wm.wm_mutex); + mutex_init(&dev_priv->pps_mutex); + + ret = i915_workqueues_init(dev_priv); + if (ret < 0) + return ret; + + /* This must be called before any calls to HAS_PCH_* */ + intel_detect_pch(dev); + + intel_pm_setup(dev); + intel_init_dpio(dev_priv); + intel_power_domains_init(dev_priv); + intel_irq_init(dev_priv); + intel_init_display_hooks(dev_priv); + intel_init_clock_gating_hooks(dev_priv); + intel_init_audio_hooks(dev_priv); + i915_gem_load_init(dev); + + intel_display_crc_init(dev); + + i915_dump_device_info(dev_priv); + + /* Not all pre-production machines fall into this category, only the + * very first ones. Almost everything should work, except for maybe + * suspend/resume. And we don't implement workarounds that affect only + * pre-production machines. */ + if (IS_HSW_EARLY_SDV(dev)) + DRM_INFO("This is an early pre-production Haswell machine. " + "It may not be fully functional.\n"); + + return 0; +} + +/** + * i915_driver_cleanup_early - cleanup the setup done in i915_driver_init_early() + * @dev_priv: device private + */ +static void i915_driver_cleanup_early(struct drm_i915_private *dev_priv) +{ + i915_gem_load_cleanup(dev_priv->dev); + i915_workqueues_cleanup(dev_priv); +} + static int i915_mmio_setup(struct drm_device *dev) { struct drm_i915_private *dev_priv = to_i915(dev); @@ -987,64 +1064,21 @@ static void i915_mmio_cleanup(struct drm_device *dev) int i915_driver_load(struct drm_device *dev, unsigned long flags) { struct drm_i915_private *dev_priv; - struct intel_device_info *info, *device_info; int ret = 0; uint32_t aperture_size; - info = (struct intel_device_info *) flags; - dev_priv = kzalloc(sizeof(*dev_priv), GFP_KERNEL); if (dev_priv == NULL) return -ENOMEM; dev->dev_private = dev_priv; - dev_priv->dev = dev; - /* Setup the write-once "constant" device info */ - device_info = (struct intel_device_info *)&dev_priv->info; - memcpy(device_info, info, sizeof(dev_priv->info)); - device_info->device_id = dev->pdev->device; + ret = i915_driver_init_early(dev_priv, dev, + (struct intel_device_info *)flags); - spin_lock_init(&dev_priv->irq_lock); - spin_lock_init(&dev_priv->gpu_error.lock); - mutex_init(&dev_priv->backlight_lock); - spin_lock_init(&dev_priv->uncore.lock); - spin_lock_init(&dev_priv->mm.object_stat_lock); - spin_lock_init(&dev_priv->mmio_flip_lock); - mutex_init(&dev_priv->sb_lock); - mutex_init(&dev_priv->modeset_restore_lock); - mutex_init(&dev_priv->av_mutex); - mutex_init(&dev_priv->wm.wm_mutex); - mutex_init(&dev_priv->pps_mutex); - - ret = i915_workqueues_init(dev_priv); if (ret < 0) goto out_free_priv; - /* This must be called before any calls to HAS_PCH_* */ - intel_detect_pch(dev); - - intel_pm_setup(dev); - intel_init_dpio(dev_priv); - intel_power_domains_init(dev_priv); - intel_irq_init(dev_priv); - intel_init_display_hooks(dev_priv); - intel_init_clock_gating_hooks(dev_priv); - intel_init_audio_hooks(dev_priv); - i915_gem_load_init(dev); - - intel_display_crc_init(dev); - - i915_dump_device_info(dev_priv); - - /* Not all pre-production machines fall into this category, only the - * very first ones. Almost everything should work, except for maybe - * suspend/resume. And we don't implement workarounds that affect only - * pre-production machines. */ - if (IS_HSW_EARLY_SDV(dev)) - DRM_INFO("This is an early pre-production Haswell machine. " - "It may not be fully functional.\n"); - intel_runtime_pm_get(dev_priv); if (i915_get_bridge_dev(dev)) { @@ -1191,8 +1225,7 @@ put_bridge: pci_dev_put(dev_priv->bridge_dev); out_runtime_pm_put: intel_runtime_pm_put(dev_priv); - i915_gem_load_cleanup(dev); - i915_workqueues_cleanup(dev_priv); + i915_driver_cleanup_early(dev_priv); out_free_priv: kfree(dev_priv); @@ -1277,8 +1310,7 @@ int i915_driver_unload(struct drm_device *dev) intel_display_power_put(dev_priv, POWER_DOMAIN_INIT); - i915_gem_load_cleanup(dev); - i915_workqueues_cleanup(dev_priv); + i915_driver_cleanup_early(dev_priv); kfree(dev_priv); return 0; -- 2.20.1