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Message-Id: <20210205064051.89592-3-saeed@kernel.org>
Date: Thu, 4 Feb 2021 22:40:36 -0800
From: Saeed Mahameed <saeed@...nel.org>
To: Jakub Kicinski <kuba@...nel.org>
Cc: netdev@...r.kernel.org, "David S. Miller" <davem@...emloft.net>,
Vlad Buslov <vladbu@...dia.com>,
Dmytro Linkin <dlinkin@...dia.com>,
Roi Dayan <roid@...dia.com>, Saeed Mahameed <saeedm@...dia.com>
Subject: [net-next 02/17] net/mlx5e: E-Switch, Maintain vhca_id to vport_num mapping
From: Vlad Buslov <vladbu@...dia.com>
Following patches in the series need to be able to map VF netdev to vport.
Since it is trivial to obtain vhca_id from netdev, maintain mapping from
vhca_id to vport_num inside eswitch offloads using xarray. Provide function
mlx5_eswitch_vhca_id_to_vport() to be used by TC code in following patches
to obtain the mapping.
Signed-off-by: Vlad Buslov <vladbu@...dia.com>
Signed-off-by: Dmytro Linkin <dlinkin@...dia.com>
Reviewed-by: Roi Dayan <roid@...dia.com>
Signed-off-by: Saeed Mahameed <saeedm@...dia.com>
---
.../net/ethernet/mellanox/mlx5/core/eswitch.c | 20 +++++
.../net/ethernet/mellanox/mlx5/core/eswitch.h | 6 ++
.../mellanox/mlx5/core/eswitch_offloads.c | 79 +++++++++++++++++++
3 files changed, 105 insertions(+)
diff --git a/drivers/net/ethernet/mellanox/mlx5/core/eswitch.c b/drivers/net/ethernet/mellanox/mlx5/core/eswitch.c
index 820305b1664e..aba17835465b 100644
--- a/drivers/net/ethernet/mellanox/mlx5/core/eswitch.c
+++ b/drivers/net/ethernet/mellanox/mlx5/core/eswitch.c
@@ -1300,6 +1300,13 @@ int mlx5_esw_vport_enable(struct mlx5_eswitch *esw, u16 vport_num,
(!vport_num && mlx5_core_is_ecpf(esw->dev)))
vport->info.trusted = true;
+ if (!mlx5_esw_is_manager_vport(esw, vport->vport) &&
+ MLX5_CAP_GEN(esw->dev, vhca_resource_manager)) {
+ ret = mlx5_esw_vport_vhca_id_set(esw, vport_num);
+ if (ret)
+ goto err_vhca_mapping;
+ }
+
esw_vport_change_handle_locked(vport);
esw->enabled_vports++;
@@ -1307,6 +1314,11 @@ int mlx5_esw_vport_enable(struct mlx5_eswitch *esw, u16 vport_num,
done:
mutex_unlock(&esw->state_lock);
return ret;
+
+err_vhca_mapping:
+ esw_vport_cleanup(esw, vport);
+ mutex_unlock(&esw->state_lock);
+ return ret;
}
void mlx5_esw_vport_disable(struct mlx5_eswitch *esw, u16 vport_num)
@@ -1325,6 +1337,11 @@ void mlx5_esw_vport_disable(struct mlx5_eswitch *esw, u16 vport_num)
/* Disable events from this vport */
arm_vport_context_events_cmd(esw->dev, vport->vport, 0);
+
+ if (!mlx5_esw_is_manager_vport(esw, vport->vport) &&
+ MLX5_CAP_GEN(esw->dev, vhca_resource_manager))
+ mlx5_esw_vport_vhca_id_clear(esw, vport_num);
+
/* We don't assume VFs will cleanup after themselves.
* Calling vport change handler while vport is disabled will cleanup
* the vport resources.
@@ -1815,6 +1832,7 @@ int mlx5_eswitch_init(struct mlx5_core_dev *dev)
mlx5e_mod_hdr_tbl_init(&esw->offloads.mod_hdr);
atomic64_set(&esw->offloads.num_flows, 0);
ida_init(&esw->offloads.vport_metadata_ida);
+ xa_init_flags(&esw->offloads.vhca_map, XA_FLAGS_ALLOC);
mutex_init(&esw->state_lock);
mutex_init(&esw->mode_lock);
@@ -1854,6 +1872,8 @@ void mlx5_eswitch_cleanup(struct mlx5_eswitch *esw)
esw_offloads_cleanup_reps(esw);
mutex_destroy(&esw->mode_lock);
mutex_destroy(&esw->state_lock);
+ WARN_ON(!xa_empty(&esw->offloads.vhca_map));
+ xa_destroy(&esw->offloads.vhca_map);
ida_destroy(&esw->offloads.vport_metadata_ida);
mlx5e_mod_hdr_tbl_destroy(&esw->offloads.mod_hdr);
mutex_destroy(&esw->offloads.encap_tbl_lock);
diff --git a/drivers/net/ethernet/mellanox/mlx5/core/eswitch.h b/drivers/net/ethernet/mellanox/mlx5/core/eswitch.h
index 479d2ac2cd85..1a045e95bc68 100644
--- a/drivers/net/ethernet/mellanox/mlx5/core/eswitch.h
+++ b/drivers/net/ethernet/mellanox/mlx5/core/eswitch.h
@@ -36,6 +36,7 @@
#include <linux/if_ether.h>
#include <linux/if_link.h>
#include <linux/atomic.h>
+#include <linux/xarray.h>
#include <net/devlink.h>
#include <linux/mlx5/device.h>
#include <linux/mlx5/eswitch.h>
@@ -212,6 +213,7 @@ struct mlx5_esw_offload {
struct mod_hdr_tbl mod_hdr;
DECLARE_HASHTABLE(termtbl_tbl, 8);
struct mutex termtbl_mutex; /* protects termtbl hash */
+ struct xarray vhca_map;
const struct mlx5_eswitch_rep_ops *rep_ops[NUM_REP_TYPES];
u8 inline_mode;
atomic64_t num_flows;
@@ -734,6 +736,10 @@ int mlx5_esw_offloads_sf_vport_enable(struct mlx5_eswitch *esw, struct devlink_p
u16 vport_num, u32 sfnum);
void mlx5_esw_offloads_sf_vport_disable(struct mlx5_eswitch *esw, u16 vport_num);
+int mlx5_esw_vport_vhca_id_set(struct mlx5_eswitch *esw, u16 vport_num);
+void mlx5_esw_vport_vhca_id_clear(struct mlx5_eswitch *esw, u16 vport_num);
+int mlx5_eswitch_vhca_id_to_vport(struct mlx5_eswitch *esw, u16 vhca_id, u16 *vport_num);
+
/**
* mlx5_esw_event_info - Indicates eswitch mode changed/changing.
*
diff --git a/drivers/net/ethernet/mellanox/mlx5/core/eswitch_offloads.c b/drivers/net/ethernet/mellanox/mlx5/core/eswitch_offloads.c
index 416ede2fe5d7..3085bdd14fbb 100644
--- a/drivers/net/ethernet/mellanox/mlx5/core/eswitch_offloads.c
+++ b/drivers/net/ethernet/mellanox/mlx5/core/eswitch_offloads.c
@@ -2872,3 +2872,82 @@ void mlx5_esw_offloads_sf_vport_disable(struct mlx5_eswitch *esw, u16 vport_num)
mlx5_esw_devlink_sf_port_unregister(esw, vport_num);
mlx5_esw_vport_disable(esw, vport_num);
}
+
+static int mlx5_esw_query_vport_vhca_id(struct mlx5_eswitch *esw, u16 vport_num, u16 *vhca_id)
+{
+ int query_out_sz = MLX5_ST_SZ_BYTES(query_hca_cap_out);
+ void *query_ctx;
+ void *hca_caps;
+ int err;
+
+ *vhca_id = 0;
+ if (mlx5_esw_is_manager_vport(esw, vport_num) ||
+ !MLX5_CAP_GEN(esw->dev, vhca_resource_manager))
+ return -EPERM;
+
+ query_ctx = kzalloc(query_out_sz, GFP_KERNEL);
+ if (!query_ctx)
+ return -ENOMEM;
+
+ err = mlx5_vport_get_other_func_cap(esw->dev, vport_num, query_ctx);
+ if (err)
+ goto out_free;
+
+ hca_caps = MLX5_ADDR_OF(query_hca_cap_out, query_ctx, capability);
+ *vhca_id = MLX5_GET(cmd_hca_cap, hca_caps, vhca_id);
+
+out_free:
+ kfree(query_ctx);
+ return err;
+}
+
+int mlx5_esw_vport_vhca_id_set(struct mlx5_eswitch *esw, u16 vport_num)
+{
+ u16 *old_entry, *vhca_map_entry, vhca_id;
+ int err;
+
+ err = mlx5_esw_query_vport_vhca_id(esw, vport_num, &vhca_id);
+ if (err) {
+ esw_warn(esw->dev, "Getting vhca_id for vport failed (vport=%u,err=%d)\n",
+ vport_num, err);
+ return err;
+ }
+
+ vhca_map_entry = kmalloc(sizeof(*vhca_map_entry), GFP_KERNEL);
+ if (!vhca_map_entry)
+ return -ENOMEM;
+
+ *vhca_map_entry = vport_num;
+ old_entry = xa_store(&esw->offloads.vhca_map, vhca_id, vhca_map_entry, GFP_KERNEL);
+ if (xa_is_err(old_entry)) {
+ kfree(vhca_map_entry);
+ return xa_err(old_entry);
+ }
+ kfree(old_entry);
+ return 0;
+}
+
+void mlx5_esw_vport_vhca_id_clear(struct mlx5_eswitch *esw, u16 vport_num)
+{
+ u16 *vhca_map_entry, vhca_id;
+ int err;
+
+ err = mlx5_esw_query_vport_vhca_id(esw, vport_num, &vhca_id);
+ if (err)
+ esw_warn(esw->dev, "Getting vhca_id for vport failed (vport=%hu,err=%d)\n",
+ vport_num, err);
+
+ vhca_map_entry = xa_erase(&esw->offloads.vhca_map, vhca_id);
+ kfree(vhca_map_entry);
+}
+
+int mlx5_eswitch_vhca_id_to_vport(struct mlx5_eswitch *esw, u16 vhca_id, u16 *vport_num)
+{
+ u16 *res = xa_load(&esw->offloads.vhca_map, vhca_id);
+
+ if (!res)
+ return -ENOENT;
+
+ *vport_num = *res;
+ return 0;
+}
--
2.29.2
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