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drm/i915/gtt: grab wakeref in gen6_alloc_va_range 

Some steps in gen6_alloc_va_range require the HW to be awake, so ideally
we should be grabbing the wakeref ourselves and not relying on the
caller already holding it for us.

Suggested-by: Chris Wilson <chris@chris-wilson.co.uk>
Signed-off-by: Matthew Auld <matthew.auld@intel.com>
Reviewed-by: Chris Wilson <chris@chris-wilson.co.uk>
Signed-off-by: Chris Wilson <chris@chris-wilson.co.uk>
Link: https://patchwork.freedesktop.org/patch/msgid/20190529123108.24422-1-matthew.auld@intel.com
This commit is contained in:
Matthew Auld 2019-05-29 13:31:07 +01:00 committed by Chris Wilson
parent 7f5f228008
commit 0a4a6e74e7
1 changed files with 7 additions and 1 deletions
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8
drivers/gpu/drm/i915/i915_gem_gtt.c
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@ -1749,10 +1749,13 @@ static int gen6_alloc_va_range(struct i915_address_space *vm,
{
struct gen6_hw_ppgtt *ppgtt = to_gen6_ppgtt(i915_vm_to_ppgtt(vm));
struct i915_page_table *pt;
intel_wakeref_t wakeref;
u64 from = start;
unsigned int pde;
bool flush = false;
wakeref = intel_runtime_pm_get(vm->i915);
gen6_for_each_pde(pt, &ppgtt->base.pd, start, length, pde) {
const unsigned int count = gen6_pte_count(start, length);
@ -1778,12 +1781,15 @@ static int gen6_alloc_va_range(struct i915_address_space *vm,
if (flush) {
mark_tlbs_dirty(&ppgtt->base);
gen6_ggtt_invalidate(ppgtt->base.vm.i915);
gen6_ggtt_invalidate(vm->i915);
}
intel_runtime_pm_put(vm->i915, wakeref);
return 0;
unwind_out:
intel_runtime_pm_put(vm->i915, wakeref);
gen6_ppgtt_clear_range(vm, from, start - from);
return -ENOMEM;
}