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| author |   Chris Wilson <chris@chris-wilson.co.uk> | 2019-05-27 12:51:14 +0100 |
|---|---|---|
| committer | Chris Wilson <chris@chris-wilson.co.uk> | 2019-05-28 08:23:09 +0100 |
| commit | b27e35ae5b1804078cfd177082429eea9de01885 (patch) | |
| tree | dbed55ae5948ebd895a12e01921dd01253942934 /drivers/gpu/drm/i915/i915_gem.c | |
| parent | drm/i915: Make sure we have enough memory bandwidth on ICL (diff) | |
| download | linux-dev-b27e35ae5b1804078cfd177082429eea9de01885.tar.xz linux-dev-b27e35ae5b1804078cfd177082429eea9de01885.zip | |
drm/i915: Keep user GGTT alive for a minimum of 250ms
Do not allow runtime pm autosuspend to remove userspace GGTT mmaps too
quickly. For example, igt sets the autosuspend delay to 0, and so we
immediately attempt to perform runtime suspend upon releasing the
wakeref. Unfortunately, that involves tearing down GGTT mmaps as they
require an active device.
Override the autosuspend for GGTT mmaps, by keeping the wakeref around
for 250ms after populating the PTE for a fresh mmap.
v2: Prefer refcount_t for its under/overflow error detection
v3: Flush the user runtime autosuspend prior to system system.
Signed-off-by: Chris Wilson <chris@chris-wilson.co.uk>
Cc: Mika Kuoppala <mika.kuoppala@linux.intel.com>
Reviewed-by: Mika Kuoppala <mika.kuoppala@linux.intel.com>
Link: https://patchwork.freedesktop.org/patch/msgid/20190527115114.13448-1-chris@chris-wilson.co.uk
Diffstat (limited to 'drivers/gpu/drm/i915/i915_gem.c')
| -rw-r--r-- | drivers/gpu/drm/i915/i915_gem.c | 7 |
1 files changed, 7 insertions, 0 deletions
diff --git a/drivers/gpu/drm/i915/i915_gem.c b/drivers/gpu/drm/i915/i915_gem.c index 7cafd5612f71..50f72ae39ad8 100644 --- a/drivers/gpu/drm/i915/i915_gem.c +++ b/drivers/gpu/drm/i915/i915_gem.c @@ -1834,6 +1834,9 @@ vm_fault_t i915_gem_fault(struct vm_fault *vmf) assert_rpm_wakelock_held(dev_priv); if (!i915_vma_set_userfault(vma) && !obj->userfault_count++) list_add(&obj->userfault_link, &dev_priv->mm.userfault_list); + if (CONFIG_DRM_I915_USERFAULT_AUTOSUSPEND) + intel_wakeref_auto(&dev_priv->mm.userfault_wakeref, + msecs_to_jiffies_timeout(CONFIG_DRM_I915_USERFAULT_AUTOSUSPEND)); GEM_BUG_ON(!obj->userfault_count); i915_vma_set_ggtt_write(vma); @@ -4671,6 +4674,8 @@ void i915_gem_fini(struct drm_i915_private *dev_priv) { GEM_BUG_ON(dev_priv->gt.awake); + intel_wakeref_auto_fini(&dev_priv->mm.userfault_wakeref); + i915_gem_suspend_late(dev_priv); intel_disable_gt_powersave(dev_priv); @@ -4746,7 +4751,9 @@ static void i915_gem_init__mm(struct drm_i915_private *i915) INIT_LIST_HEAD(&i915->mm.unbound_list); INIT_LIST_HEAD(&i915->mm.bound_list); INIT_LIST_HEAD(&i915->mm.fence_list); + INIT_LIST_HEAD(&i915->mm.userfault_list); + intel_wakeref_auto_init(&i915->mm.userfault_wakeref, i915); INIT_WORK(&i915->mm.free_work, __i915_gem_free_work); } |