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| author | Chris Wilson <chris@chris-wilson.co.uk> | 2020-01-10 17:44:18 +0300 |
|---|---|---|
| committer | Chris Wilson <chris@chris-wilson.co.uk> | 2020-01-10 23:30:40 +0300 |
| commit | c0e60347d44d5e06869a253de326373e976be1c7 (patch) | |
| tree | 9ec946219384465103acd8cb75f8ecb97649e394 /drivers/gpu/drm/i915/i915_vma.c | |
| parent | 8cbf89db294166cc13d90a89422605e0c9f8bbc2 (diff) | |
| download | linux-c0e60347d44d5e06869a253de326373e976be1c7.tar.xz | |
drm/i915/gt: Hold rpm wakeref before taking ggtt->vm.mutex
We need to hold the runtime-pm wakeref to update the global PTEs (as
they exist behind a PCI BAR). However, some systems invoke ACPI during
runtime resume and so require allocations, which is verboten inside the
vm->mutex. Ergo, we must not use intel_runtime_pm_get() inside the
mutex, but lift the call outside.
Closes: https://gitlab.freedesktop.org/drm/intel/issues/958
Signed-off-by: Chris Wilson <chris@chris-wilson.co.uk>
Cc: Maarten Lankhorst <maarten.lankhorst@linux.intel.com>
Cc: Matthew Auld <matthew.auld@intel.com>
Cc: Mika Kuoppala <mika.kuoppala@linux.intel.com>
Reviewed-by: Matthew Auld <matthew.auld@intel.com>
Link: https://patchwork.freedesktop.org/patch/msgid/20200110144418.1415639-1-chris@chris-wilson.co.uk
Diffstat (limited to 'drivers/gpu/drm/i915/i915_vma.c')
| -rw-r--r-- | drivers/gpu/drm/i915/i915_vma.c | 14 |
1 files changed, 14 insertions, 0 deletions
diff --git a/drivers/gpu/drm/i915/i915_vma.c b/drivers/gpu/drm/i915/i915_vma.c index 43d5c270bdb0..17d7c525ea5c 100644 --- a/drivers/gpu/drm/i915/i915_vma.c +++ b/drivers/gpu/drm/i915/i915_vma.c @@ -858,6 +858,7 @@ static void vma_unbind_pages(struct i915_vma *vma) int i915_vma_pin(struct i915_vma *vma, u64 size, u64 alignment, u64 flags) { struct i915_vma_work *work = NULL; + intel_wakeref_t wakeref = 0; unsigned int bound; int err; @@ -883,6 +884,9 @@ int i915_vma_pin(struct i915_vma *vma, u64 size, u64 alignment, u64 flags) } } + if (flags & PIN_GLOBAL) + wakeref = intel_runtime_pm_get(&vma->vm->i915->runtime_pm); + /* No more allocations allowed once we hold vm->mutex */ err = mutex_lock_interruptible(&vma->vm->mutex); if (err) @@ -946,6 +950,8 @@ err_unlock: err_fence: if (work) dma_fence_work_commit(&work->base); + if (wakeref) + intel_runtime_pm_put(&vma->vm->i915->runtime_pm, wakeref); err_pages: vma_put_pages(vma); return err; @@ -1246,11 +1252,16 @@ int __i915_vma_unbind(struct i915_vma *vma) int i915_vma_unbind(struct i915_vma *vma) { struct i915_address_space *vm = vma->vm; + intel_wakeref_t wakeref = 0; int err; if (!drm_mm_node_allocated(&vma->node)) return 0; + if (i915_vma_is_bound(vma, I915_VMA_GLOBAL_BIND)) + /* XXX not always required: nop_clear_range */ + wakeref = intel_runtime_pm_get(&vm->i915->runtime_pm); + err = mutex_lock_interruptible(&vm->mutex); if (err) return err; @@ -1258,6 +1269,9 @@ int i915_vma_unbind(struct i915_vma *vma) err = __i915_vma_unbind(vma); mutex_unlock(&vm->mutex); + if (wakeref) + intel_runtime_pm_put(&vm->i915->runtime_pm, wakeref); + return err; } |