[08/22] drm/i915: Add ww context handling to context_barrier_task
diff mbox series

Message ID 20200330143545.4371-8-maarten.lankhorst@linux.intel.com
State New
Headers show
Series
  • [01/22] Revert "drm/i915/gem: Drop relocation slowpath"
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Commit Message

Maarten Lankhorst March 30, 2020, 2:35 p.m. UTC
This is required if we want to pass a ww context in intel_context_pin
and gen6_ppgtt_pin().

Signed-off-by: Maarten Lankhorst <maarten.lankhorst@linux.intel.com>
---
 drivers/gpu/drm/i915/gem/i915_gem_context.c   | 55 ++++++++++++++-----
 .../drm/i915/gem/selftests/i915_gem_context.c | 22 +++-----
 2 files changed, 48 insertions(+), 29 deletions(-)

Patch
diff mbox series

diff --git a/drivers/gpu/drm/i915/gem/i915_gem_context.c b/drivers/gpu/drm/i915/gem/i915_gem_context.c
index ac2b88ca00ce..062848951095 100644
--- a/drivers/gpu/drm/i915/gem/i915_gem_context.c
+++ b/drivers/gpu/drm/i915/gem/i915_gem_context.c
@@ -1097,6 +1097,7 @@  I915_SELFTEST_DECLARE(static intel_engine_mask_t context_barrier_inject_fault);
 static int context_barrier_task(struct i915_gem_context *ctx,
 				intel_engine_mask_t engines,
 				bool (*skip)(struct intel_context *ce, void *data),
+				int (*pin)(struct intel_context *ce, struct i915_gem_ww_ctx *ww, void *data),
 				int (*emit)(struct i915_request *rq, void *data),
 				void (*task)(void *data),
 				void *data)
@@ -1104,6 +1105,7 @@  static int context_barrier_task(struct i915_gem_context *ctx,
 	struct context_barrier_task *cb;
 	struct i915_gem_engines_iter it;
 	struct i915_gem_engines *e;
+	struct i915_gem_ww_ctx ww;
 	struct intel_context *ce;
 	int err = 0;
 
@@ -1141,10 +1143,21 @@  static int context_barrier_task(struct i915_gem_context *ctx,
 		if (skip && skip(ce, data))
 			continue;
 
-		rq = intel_context_create_request(ce);
+		i915_gem_ww_ctx_init(&ww, true);
+retry:
+		err = intel_context_pin(ce);
+		if (err)
+			goto err;
+
+		if (pin)
+			err = pin(ce, &ww, data);
+		if (err)
+			goto err_unpin;
+
+		rq = i915_request_create(ce);
 		if (IS_ERR(rq)) {
 			err = PTR_ERR(rq);
-			break;
+			goto err_unpin;
 		}
 
 		err = 0;
@@ -1154,6 +1167,16 @@  static int context_barrier_task(struct i915_gem_context *ctx,
 			err = i915_active_add_request(&cb->base, rq);
 
 		i915_request_add(rq);
+err_unpin:
+		intel_context_unpin(ce);
+err:
+		if (err == -EDEADLK) {
+			err = i915_gem_ww_ctx_backoff(&ww);
+			if (!err)
+				goto retry;
+		}
+		i915_gem_ww_ctx_fini(&ww);
+
 		if (err)
 			break;
 	}
@@ -1209,6 +1232,17 @@  static void set_ppgtt_barrier(void *data)
 	i915_vm_close(old);
 }
 
+static int pin_ppgtt_update(struct intel_context *ce, struct i915_gem_ww_ctx *ww, void *data)
+{
+	struct i915_address_space *vm = ce->vm;
+
+	if (!HAS_LOGICAL_RING_CONTEXTS(vm->i915))
+		/* ppGTT is not part of the legacy context image */
+		return gen6_ppgtt_pin(i915_vm_to_ppgtt(vm));
+
+	return 0;
+}
+
 static int emit_ppgtt_update(struct i915_request *rq, void *data)
 {
 	struct i915_address_space *vm = rq->context->vm;
@@ -1265,20 +1299,10 @@  static int emit_ppgtt_update(struct i915_request *rq, void *data)
 
 static bool skip_ppgtt_update(struct intel_context *ce, void *data)
 {
-	if (!test_bit(CONTEXT_ALLOC_BIT, &ce->flags))
-		return true;
-
 	if (HAS_LOGICAL_RING_CONTEXTS(ce->engine->i915))
-		return false;
-
-	if (!atomic_read(&ce->pin_count))
-		return true;
-
-	/* ppGTT is not part of the legacy context image */
-	if (gen6_ppgtt_pin(i915_vm_to_ppgtt(ce->vm)))
-		return true;
-
-	return false;
+		return !ce->state;
+	else
+		return !atomic_read(&ce->pin_count);
 }
 
 static int set_ppgtt(struct drm_i915_file_private *file_priv,
@@ -1329,6 +1353,7 @@  static int set_ppgtt(struct drm_i915_file_private *file_priv,
 	 */
 	err = context_barrier_task(ctx, ALL_ENGINES,
 				   skip_ppgtt_update,
+				   pin_ppgtt_update,
 				   emit_ppgtt_update,
 				   set_ppgtt_barrier,
 				   old);
diff --git a/drivers/gpu/drm/i915/gem/selftests/i915_gem_context.c b/drivers/gpu/drm/i915/gem/selftests/i915_gem_context.c
index 42edbd0f3c14..78356031ec61 100644
--- a/drivers/gpu/drm/i915/gem/selftests/i915_gem_context.c
+++ b/drivers/gpu/drm/i915/gem/selftests/i915_gem_context.c
@@ -1903,8 +1903,8 @@  static int mock_context_barrier(void *arg)
 		return -ENOMEM;
 
 	counter = 0;
-	err = context_barrier_task(ctx, 0,
-				   NULL, NULL, mock_barrier_task, &counter);
+	err = context_barrier_task(ctx, 0, NULL, NULL, NULL,
+				   mock_barrier_task, &counter);
 	if (err) {
 		pr_err("Failed at line %d, err=%d\n", __LINE__, err);
 		goto out;
@@ -1916,11 +1916,8 @@  static int mock_context_barrier(void *arg)
 	}
 
 	counter = 0;
-	err = context_barrier_task(ctx, ALL_ENGINES,
-				   skip_unused_engines,
-				   NULL,
-				   mock_barrier_task,
-				   &counter);
+	err = context_barrier_task(ctx, ALL_ENGINES, skip_unused_engines,
+				   NULL, NULL, mock_barrier_task, &counter);
 	if (err) {
 		pr_err("Failed at line %d, err=%d\n", __LINE__, err);
 		goto out;
@@ -1940,8 +1937,8 @@  static int mock_context_barrier(void *arg)
 
 	counter = 0;
 	context_barrier_inject_fault = BIT(RCS0);
-	err = context_barrier_task(ctx, ALL_ENGINES,
-				   NULL, NULL, mock_barrier_task, &counter);
+	err = context_barrier_task(ctx, ALL_ENGINES, NULL, NULL, NULL,
+				   mock_barrier_task, &counter);
 	context_barrier_inject_fault = 0;
 	if (err == -ENXIO)
 		err = 0;
@@ -1955,11 +1952,8 @@  static int mock_context_barrier(void *arg)
 		goto out;
 
 	counter = 0;
-	err = context_barrier_task(ctx, ALL_ENGINES,
-				   skip_unused_engines,
-				   NULL,
-				   mock_barrier_task,
-				   &counter);
+	err = context_barrier_task(ctx, ALL_ENGINES, skip_unused_engines,
+				   NULL, NULL, mock_barrier_task, &counter);
 	if (err) {
 		pr_err("Failed at line %d, err=%d\n", __LINE__, err);
 		goto out;