Currently we have a lot of places where we hold the gem object lock, but haven't yet been converted to the ww dance. Complain loudly about those places.
i915_vma_pin shouldn't have the obj lock held, so we can do a ww dance, while i915_vma_pin_ww should.
Signed-off-by: Maarten Lankhorst maarten.lankhorst@linux.intel.com Reviewed-by: Thomas Hellström thomas.hellstrom@linux.intel.com #irc --- drivers/gpu/drm/i915/gt/intel_renderstate.c | 2 +- drivers/gpu/drm/i915/i915_vma.c | 11 ++++++++++- drivers/gpu/drm/i915/i915_vma.h | 3 +++ 3 files changed, 14 insertions(+), 2 deletions(-)
diff --git a/drivers/gpu/drm/i915/gt/intel_renderstate.c b/drivers/gpu/drm/i915/gt/intel_renderstate.c index 0f7c0a148b80..b03e197b1d99 100644 --- a/drivers/gpu/drm/i915/gt/intel_renderstate.c +++ b/drivers/gpu/drm/i915/gt/intel_renderstate.c @@ -176,7 +176,7 @@ int intel_renderstate_init(struct intel_renderstate *so, if (err) goto err_context;
- err = i915_vma_pin(so->vma, 0, 0, PIN_GLOBAL | PIN_HIGH); + err = i915_vma_pin_ww(so->vma, &so->ww, 0, 0, PIN_GLOBAL | PIN_HIGH); if (err) goto err_context;
diff --git a/drivers/gpu/drm/i915/i915_vma.c b/drivers/gpu/drm/i915/i915_vma.c index caa9b041616b..7310893086f7 100644 --- a/drivers/gpu/drm/i915/i915_vma.c +++ b/drivers/gpu/drm/i915/i915_vma.c @@ -865,6 +865,8 @@ int i915_vma_pin_ww(struct i915_vma *vma, struct i915_gem_ww_ctx *ww, #ifdef CONFIG_PROVE_LOCKING if (debug_locks && lockdep_is_held(&vma->vm->i915->drm.struct_mutex)) WARN_ON(!ww); + if (debug_locks && ww && vma->resv) + assert_vma_held(vma); #endif
BUILD_BUG_ON(PIN_GLOBAL != I915_VMA_GLOBAL_BIND); @@ -1020,8 +1022,15 @@ int i915_ggtt_pin(struct i915_vma *vma, struct i915_gem_ww_ctx *ww,
GEM_BUG_ON(!i915_vma_is_ggtt(vma));
+#ifdef CONFIG_LOCKDEP + WARN_ON(!ww && vma->resv && dma_resv_held(vma->resv)); +#endif + do { - err = i915_vma_pin_ww(vma, ww, 0, align, flags | PIN_GLOBAL); + if (ww) + err = i915_vma_pin_ww(vma, ww, 0, align, flags | PIN_GLOBAL); + else + err = i915_vma_pin(vma, 0, align, flags | PIN_GLOBAL); if (err != -ENOSPC) { if (!err) { err = i915_vma_wait_for_bind(vma); diff --git a/drivers/gpu/drm/i915/i915_vma.h b/drivers/gpu/drm/i915/i915_vma.h index a64adc8c883b..3c914c9de9a9 100644 --- a/drivers/gpu/drm/i915/i915_vma.h +++ b/drivers/gpu/drm/i915/i915_vma.h @@ -243,6 +243,9 @@ i915_vma_pin_ww(struct i915_vma *vma, struct i915_gem_ww_ctx *ww, static inline int __must_check i915_vma_pin(struct i915_vma *vma, u64 size, u64 alignment, u64 flags) { +#ifdef CONFIG_LOCKDEP + WARN_ON_ONCE(vma->resv && dma_resv_held(vma->resv)); +#endif return i915_vma_pin_ww(vma, NULL, size, alignment, flags); }