prov/efa: Disable resource management when user set FI_OPT_EFA_RNR_RETRY

If a user is explicitly asking for a retry count that means they
also want to manage the resources themselves and the EFA provider
should disable resource management to prevent implicit retries.

Also remove the unused function.

Signed-off-by: Jessie Yang <[email protected]>

Author: jiaxiyan

prov/efa/src/rdm/efa_rdm_ep.h

@@ -263,27 +263,6 @@ struct efa_domain *efa_rdm_ep_domain(struct efa_rdm_ep *ep)
 
 void efa_rdm_ep_post_internal_rx_pkts(struct efa_rdm_ep *ep);
 
-/**
- * @brief return whether this endpoint should write error cq entry for RNR.
- *
- * For an endpoint to write RNR completion, two conditions must be met:
- *
- * First, the end point must be able to receive RNR completion from rdma-core,
- * which means rnr_etry must be less then EFA_RNR_INFINITE_RETRY.
- *
- * Second, the app need to request this feature when opening endpoint
- * (by setting info->domain_attr->resource_mgmt to FI_RM_DISABLED).
- * The setting was saved as efa_rdm_ep->handle_resource_management.
- *
- * @param[in]	ep	endpoint
- */
-static inline
-bool efa_rdm_ep_should_write_rnr_completion(struct efa_rdm_ep *ep)
-{
-	return (efa_env.rnr_retry < EFA_RNR_INFINITE_RETRY) &&
-		(ep->handle_resource_management == FI_RM_DISABLED);
-}
-
 /*
  * @brief: check whether we should use p2p for this transaction
  *

prov/efa/src/rdm/efa_rdm_ep_fiops.c

@@ -1697,6 +1697,12 @@ static int efa_rdm_ep_setopt(fid_t fid, int level, int optname,
 			return -FI_ENOSYS;
 		}
 		efa_rdm_ep->base_ep.rnr_retry = *(size_t *)optval;
+		/*
+		 * If a user is explicitly asking for a retry count that means 
+		 * they also want to manage the resources themselves and the EFA 
+		 * provider should disable resource management to prevent implicit retries.
+		 */
+		efa_rdm_ep->handle_resource_management = FI_RM_DISABLED;
 		break;
 	case FI_OPT_FI_HMEM_P2P:
 		if (optlen != sizeof(int))

prov/efa/test/efa_unit_test_ep.c

@@ -858,6 +858,31 @@ void test_efa_rdm_ep_setopt_shared_memory_permitted(struct efa_resource **state)
 	assert_null(ep->shm_ep);
 }
 
+/* Test resource management is disabled when user sets FI_OPT_EFA_RNR_RETRY */
+void test_efa_rdm_ep_setopt_rnr_retry(struct efa_resource **state)
+{
+	struct efa_resource *resource = *state;
+	struct efa_rdm_ep *ep;
+	size_t rnr_retry = 5;
+
+	resource->hints = efa_unit_test_alloc_hints(FI_EP_RDM);
+
+	efa_unit_test_resource_construct_with_hints(
+		resource, FI_EP_RDM, FI_VERSION(1, 14), resource->hints, false,
+		true);
+
+	assert_int_equal(fi_setopt(&resource->ep->fid, FI_OPT_ENDPOINT,
+				   FI_OPT_EFA_RNR_RETRY, &rnr_retry,
+				   sizeof(rnr_retry)), 0);
+
+	assert_int_equal(fi_enable(resource->ep), 0);
+
+	ep = container_of(resource->ep, struct efa_rdm_ep,
+			  base_ep.util_ep.ep_fid);
+
+	assert_int_equal(ep->handle_resource_management, FI_RM_DISABLED);
+}
+
 /**
  * @brief Test fi_enable with different optval of fi_setopt for
  * FI_OPT_EFA_WRITE_IN_ORDER_ALIGNED_128_BYTES optname.

prov/efa/test/efa_unit_tests.c

@@ -92,6 +92,7 @@ int main(void)
 		cmocka_unit_test_setup_teardown(test_efa_rdm_ep_getopt_undersized_optlen, efa_unit_test_mocks_setup, efa_unit_test_mocks_teardown),
 		cmocka_unit_test_setup_teardown(test_efa_rdm_ep_getopt_oversized_optlen, efa_unit_test_mocks_setup, efa_unit_test_mocks_teardown),
 		cmocka_unit_test_setup_teardown(test_efa_rdm_ep_setopt_shared_memory_permitted, efa_unit_test_mocks_setup, efa_unit_test_mocks_teardown),
+		cmocka_unit_test_setup_teardown(test_efa_rdm_ep_setopt_rnr_retry, efa_unit_test_mocks_setup, efa_unit_test_mocks_teardown),
 		cmocka_unit_test_setup_teardown(test_efa_rdm_ep_enable_qp_in_order_aligned_128_bytes_good, efa_unit_test_mocks_setup, efa_unit_test_mocks_teardown),
 		cmocka_unit_test_setup_teardown(test_efa_rdm_ep_enable_qp_in_order_aligned_128_bytes_bad, efa_unit_test_mocks_setup, efa_unit_test_mocks_teardown),
 		cmocka_unit_test_setup_teardown(test_efa_rdm_ep_pkt_pool_flags, efa_unit_test_mocks_setup, efa_unit_test_mocks_teardown),

prov/efa/test/efa_unit_tests.h

@@ -117,6 +117,7 @@ void test_efa_rdm_ep_send_with_shm_no_copy();
 void test_efa_rdm_ep_rma_without_caps();
 void test_efa_rdm_ep_atomic_without_caps();
 void test_efa_rdm_ep_setopt_shared_memory_permitted();
+void test_efa_rdm_ep_setopt_rnr_retry();
 void test_efa_rdm_ep_enable_qp_in_order_aligned_128_bytes_good();
 void test_efa_rdm_ep_enable_qp_in_order_aligned_128_bytes_bad();
 void test_efa_rdm_ep_user_zcpy_rx_disabled();