[RFC,033/162] drm/i915: Move pinning to inside engine_wa_list_verify()

Commit Message

Matthew Auld Nov. 27, 2020, 12:05 p.m. UTC

From: Maarten Lankhorst <[e-mail]>

This should be done as part of the ww loop, in order to remove a
i915_vma_pin that needs ww held.

Now only i915_ggtt_pin() callers remaining.

Signed-off-by: Maarten Lankhorst <[e-mail]>
Cc: Thomas Hellström <[e-mail]>
---
 drivers/gpu/drm/i915/gt/intel_workarounds.c   | 24 ++++++++----------
 .../gpu/drm/i915/gt/selftest_workarounds.c    | 25 ++++++++++++++++---
 2 files changed, 32 insertions(+), 17 deletions(-)

Patch

diff --git a/drivers/gpu/drm/i915/gt/intel_workarounds.c b/drivers/gpu/drm/i915/gt/intel_workarounds.c
index a82554baa6ac..de50b7c47ea3 100644
--- a/drivers/gpu/drm/i915/gt/intel_workarounds.c
+++ b/drivers/gpu/drm/i915/gt/intel_workarounds.c
@@ -2073,7 +2073,6 @@  create_scratch(struct i915_address_space *vm, int count)
 	struct drm_i915_gem_object *obj;
 	struct i915_vma *vma;
 	unsigned int size;
-	int err;
 
 	size = round_up(count * sizeof(u32), PAGE_SIZE);
 	obj = i915_gem_object_create_internal(vm->i915, size);
@@ -2084,20 +2083,11 @@  create_scratch(struct i915_address_space *vm, int count)
 
 	vma = i915_vma_instance(obj, vm, NULL);
 	if (IS_ERR(vma)) {
-		err = PTR_ERR(vma);
-		goto err_obj;
+		i915_gem_object_put(obj);
+		return vma;
 	}
 
-	err = i915_vma_pin(vma, 0, 0,
-			   i915_vma_is_ggtt(vma) ? PIN_GLOBAL : PIN_USER);
-	if (err)
-		goto err_obj;
-
 	return vma;
-
-err_obj:
-	i915_gem_object_put(obj);
-	return ERR_PTR(err);
 }
 
 struct mcr_range {
@@ -2215,10 +2205,15 @@  static int engine_wa_list_verify(struct intel_context *ce,
 	if (err)
 		goto err_pm;
 
+	err = i915_vma_pin_ww(vma, &ww, 0, 0,
+			   i915_vma_is_ggtt(vma) ? PIN_GLOBAL : PIN_USER);
+	if (err)
+		goto err_unpin;
+
 	rq = i915_request_create(ce);
 	if (IS_ERR(rq)) {
 		err = PTR_ERR(rq);
-		goto err_unpin;
+		goto err_vma;
 	}
 
 	err = i915_request_await_object(rq, vma->obj, true);
@@ -2259,6 +2254,8 @@  static int engine_wa_list_verify(struct intel_context *ce,
 
 err_rq:
 	i915_request_put(rq);
+err_vma:
+	i915_vma_unpin(vma);
 err_unpin:
 	intel_context_unpin(ce);
 err_pm:
@@ -2269,7 +2266,6 @@  static int engine_wa_list_verify(struct intel_context *ce,
 	}
 	i915_gem_ww_ctx_fini(&ww);
 	intel_engine_pm_put(ce->engine);
-	i915_vma_unpin(vma);
 	i915_vma_put(vma);
 	return err;
 }
diff --git a/drivers/gpu/drm/i915/gt/selftest_workarounds.c b/drivers/gpu/drm/i915/gt/selftest_workarounds.c
index 61a0532d0f3d..810ab026a55e 100644
--- a/drivers/gpu/drm/i915/gt/selftest_workarounds.c
+++ b/drivers/gpu/drm/i915/gt/selftest_workarounds.c
@@ -386,6 +386,25 @@  static struct i915_vma *create_batch(struct i915_address_space *vm)
 	return ERR_PTR(err);
 }
 
+static struct i915_vma *
+create_scratch_pinned(struct i915_address_space *vm, int count)
+{
+	struct i915_vma *vma = create_scratch(vm, count);
+	int err;
+
+	if (IS_ERR(vma))
+		return vma;
+
+	err = i915_vma_pin(vma, 0, 0,
+			   i915_vma_is_ggtt(vma) ? PIN_GLOBAL : PIN_USER);
+	if (err) {
+		i915_vma_put(vma);
+		return ERR_PTR(err);
+	}
+
+	return vma;
+}
+
 static u32 reg_write(u32 old, u32 new, u32 rsvd)
 {
 	if (rsvd == 0x0000ffff) {
@@ -489,7 +508,7 @@  static int check_dirty_whitelist(struct intel_context *ce)
 	int err = 0, i, v;
 	u32 *cs, *results;
 
-	scratch = create_scratch(ce->vm, 2 * ARRAY_SIZE(values) + 1);
+	scratch = create_scratch_pinned(ce->vm, 2 * ARRAY_SIZE(values) + 1);
 	if (IS_ERR(scratch))
 		return PTR_ERR(scratch);
 
@@ -1043,7 +1062,7 @@  static int live_isolated_whitelist(void *arg)
 
 		vm = i915_gem_context_get_vm_rcu(c);
 
-		client[i].scratch[0] = create_scratch(vm, 1024);
+		client[i].scratch[0] = create_scratch_pinned(vm, 1024);
 		if (IS_ERR(client[i].scratch[0])) {
 			err = PTR_ERR(client[i].scratch[0]);
 			i915_vm_put(vm);
@@ -1051,7 +1070,7 @@  static int live_isolated_whitelist(void *arg)
 			goto err;
 		}
 
-		client[i].scratch[1] = create_scratch(vm, 1024);
+		client[i].scratch[1] = create_scratch_pinned(vm, 1024);
 		if (IS_ERR(client[i].scratch[1])) {
 			err = PTR_ERR(client[i].scratch[1]);
 			i915_vma_unpin_and_release(&client[i].scratch[0], 0);