Since we want to revoke the ggtt vma from only under the ggtt->mutex, we need to move protection of the userfault tracking from the struct_mutex to the ggtt->mutex.
Signed-off-by: Chris Wilson <[email protected]> --- drivers/gpu/drm/i915/gem/i915_gem_mman.c | 10 +++++++--- drivers/gpu/drm/i915/i915_debugfs.c | 2 +- drivers/gpu/drm/i915/i915_vma.c | 4 +++- 3 files changed, 11 insertions(+), 5 deletions(-) diff --git a/drivers/gpu/drm/i915/gem/i915_gem_mman.c b/drivers/gpu/drm/i915/gem/i915_gem_mman.c index dba5dd779149..595539a09e38 100644 --- a/drivers/gpu/drm/i915/gem/i915_gem_mman.c +++ b/drivers/gpu/drm/i915/gem/i915_gem_mman.c @@ -306,14 +306,17 @@ vm_fault_t i915_gem_fault(struct vm_fault *vmf) if (ret) goto err_fence; - /* Mark as being mmapped into userspace for later revocation */ assert_rpm_wakelock_held(rpm); + + /* Mark as being mmapped into userspace for later revocation */ + mutex_lock(&i915->ggtt.vm.mutex); if (!i915_vma_set_userfault(vma) && !obj->userfault_count++) list_add(&obj->userfault_link, &i915->ggtt.userfault_list); + mutex_unlock(&i915->ggtt.vm.mutex); + if (CONFIG_DRM_I915_USERFAULT_AUTOSUSPEND) intel_wakeref_auto(&i915->ggtt.userfault_wakeref, msecs_to_jiffies_timeout(CONFIG_DRM_I915_USERFAULT_AUTOSUSPEND)); - GEM_BUG_ON(!obj->userfault_count); i915_vma_set_ggtt_write(vma); @@ -408,8 +411,8 @@ void i915_gem_object_release_mmap(struct drm_i915_gem_object *obj) * requirement that operations to the GGTT be made holding the RPM * wakeref. */ - lockdep_assert_held(&i915->drm.struct_mutex); wakeref = intel_runtime_pm_get(&i915->runtime_pm); + mutex_lock(&i915->ggtt.vm.mutex); if (!obj->userfault_count) goto out; @@ -426,6 +429,7 @@ void i915_gem_object_release_mmap(struct drm_i915_gem_object *obj) wmb(); out: + mutex_unlock(&i915->ggtt.vm.mutex); intel_runtime_pm_put(&i915->runtime_pm, wakeref); } diff --git a/drivers/gpu/drm/i915/i915_debugfs.c b/drivers/gpu/drm/i915/i915_debugfs.c index f5d6702ec7df..b0f51591f2e4 100644 --- a/drivers/gpu/drm/i915/i915_debugfs.c +++ b/drivers/gpu/drm/i915/i915_debugfs.c @@ -94,7 +94,7 @@ static char get_tiling_flag(struct drm_i915_gem_object *obj) static char get_global_flag(struct drm_i915_gem_object *obj) { - return obj->userfault_count ? 'g' : ' '; + return READ_ONCE(obj->userfault_count) ? 'g' : ' '; } static char get_pin_mapped_flag(struct drm_i915_gem_object *obj) diff --git a/drivers/gpu/drm/i915/i915_vma.c b/drivers/gpu/drm/i915/i915_vma.c index 79f9d1fb7611..9840cb2f70b9 100644 --- a/drivers/gpu/drm/i915/i915_vma.c +++ b/drivers/gpu/drm/i915/i915_vma.c @@ -864,7 +864,7 @@ void i915_vma_revoke_mmap(struct i915_vma *vma) struct drm_vma_offset_node *node = &vma->obj->base.vma_node; u64 vma_offset; - lockdep_assert_held(&vma->vm->i915->drm.struct_mutex); + lockdep_assert_held(&vma->vm->mutex); if (!i915_vma_has_userfault(vma)) return; @@ -987,7 +987,9 @@ int i915_vma_unbind(struct i915_vma *vma) return ret; /* Force a pagefault for domain tracking on next user access */ + mutex_lock(&vma->vm->mutex); i915_vma_revoke_mmap(vma); + mutex_unlock(&vma->vm->mutex); __i915_vma_iounmap(vma); vma->flags &= ~I915_VMA_CAN_FENCE; -- 2.23.0.rc1 _______________________________________________ Intel-gfx mailing list [email protected] https://lists.freedesktop.org/mailman/listinfo/intel-gfx
