From: Suanming Mou <suanmingm@mellanox.com>
Date: Mon, 1 Jun 2020 06:09:42 +0000 (+0800)
Subject: common/mlx5: add memory reclaim glue function
X-Git-Url: http://git.droids-corp.org/?a=commitdiff_plain;h=bebee850162d92015a67894d2937c944c677421e;p=dpdk.git

common/mlx5: add memory reclaim glue function

While flow destroyed, rdma-core may still cache some resources for more
efficiently flow recreate. In case the peak time that millions of flows
created and destroyed, the cached resources will be very huge.

Currently, rdma-core provides the new function to configure the flow
resources not to be cached. Add the memory reclaim function to avoid
too many resources be cached.

This is the first patch for the memory reclaim. A new devarg will be
added to PMD to support the reclaim can be configured.

Signed-off-by: Suanming Mou <suanmingm@mellanox.com>
Acked-by: Viacheslav Ovsiienko <viacheslavo@mellanox.com>
---

diff --git a/drivers/common/mlx5/Makefile b/drivers/common/mlx5/Makefile
index e9863b5fdb..4948fef647 100644
--- a/drivers/common/mlx5/Makefile
+++ b/drivers/common/mlx5/Makefile
@@ -195,6 +195,11 @@ mlx5_autoconf.h.new: $(RTE_SDK)/buildtools/auto-config-h.sh
 		infiniband/mlx5dv.h \
 		func mlx5dv_alloc_var \
 		$(AUTOCONF_OUTPUT)
+	$Q sh -- '$<' '$@' \
+		HAVE_MLX5DV_DR_MEM_RECLAIM \
+		infiniband/mlx5dv.h \
+		func mlx5dv_dr_domain_set_reclaim_device_memory \
+		$(AUTOCONF_OUTPUT)
 	$Q sh -- '$<' '$@' \
 		HAVE_ETHTOOL_LINK_MODE_25G \
 		/usr/include/linux/ethtool.h \
diff --git a/drivers/common/mlx5/linux/meson.build b/drivers/common/mlx5/linux/meson.build
index f0016fa6a7..ce065d9346 100644
--- a/drivers/common/mlx5/linux/meson.build
+++ b/drivers/common/mlx5/linux/meson.build
@@ -159,6 +159,8 @@ has_sym_args = [
 	'RDMA_NLDEV_ATTR_NDEV_INDEX' ],
 	[ 'HAVE_MLX5_DR_FLOW_DUMP', 'infiniband/mlx5dv.h',
 	'mlx5dv_dump_dr_domain'],
+	[ 'HAVE_MLX5DV_DR_MEM_RECLAIM', 'infiniband/mlx5dv.h',
+	'mlx5dv_dr_domain_set_reclaim_device_memory'],
 	[ 'HAVE_DEVLINK', 'linux/devlink.h', 'DEVLINK_GENL_NAME' ],
 ]
 config = configuration_data()
diff --git a/drivers/common/mlx5/linux/mlx5_glue.c b/drivers/common/mlx5/linux/mlx5_glue.c
index d48660bb6d..c91ee33bba 100644
--- a/drivers/common/mlx5/linux/mlx5_glue.c
+++ b/drivers/common/mlx5/linux/mlx5_glue.c
@@ -1182,6 +1182,18 @@ mlx5_glue_dv_free_var(struct mlx5dv_var *var)
 #endif
 }
 
+
+static void
+mlx5_glue_dr_reclaim_domain_memory(void *domain, uint32_t enable)
+{
+#ifdef HAVE_MLX5DV_DR_MEM_RECLAIM
+	mlx5dv_dr_domain_set_reclaim_device_memory(domain, enable);
+#else
+	(void)(enable);
+	(void)(domain);
+#endif
+}
+
 __rte_cache_aligned
 const struct mlx5_glue *mlx5_glue = &(const struct mlx5_glue) {
 	.version = MLX5_GLUE_VERSION,
@@ -1281,6 +1293,7 @@ const struct mlx5_glue *mlx5_glue = &(const struct mlx5_glue) {
 	.devx_qp_query = mlx5_glue_devx_qp_query,
 	.devx_port_query = mlx5_glue_devx_port_query,
 	.dr_dump_domain = mlx5_glue_dr_dump_domain,
+	.dr_reclaim_domain_memory = mlx5_glue_dr_reclaim_domain_memory,
 	.devx_query_eqn = mlx5_glue_devx_query_eqn,
 	.devx_create_event_channel = mlx5_glue_devx_create_event_channel,
 	.devx_destroy_event_channel = mlx5_glue_devx_destroy_event_channel,
diff --git a/drivers/common/mlx5/linux/mlx5_glue.h b/drivers/common/mlx5/linux/mlx5_glue.h
index 81d6a2267d..5d238a40ad 100644
--- a/drivers/common/mlx5/linux/mlx5_glue.h
+++ b/drivers/common/mlx5/linux/mlx5_glue.h
@@ -302,6 +302,7 @@ struct mlx5_glue {
 			(struct mlx5dv_devx_event_channel *event_channel,
 			 struct mlx5dv_devx_async_event_hdr *event_data,
 			 size_t event_resp_len);
+	void (*dr_reclaim_domain_memory)(void *domain, uint32_t enable);
 };
 
 extern const struct mlx5_glue *mlx5_glue;