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Message-ID: <20181017085215.26607-9-idosch@mellanox.com>
Date: Wed, 17 Oct 2018 08:53:16 +0000
From: Ido Schimmel <idosch@...lanox.com>
To: "netdev@...r.kernel.org" <netdev@...r.kernel.org>
CC: "davem@...emloft.net" <davem@...emloft.net>,
Jiri Pirko <jiri@...lanox.com>,
Petr Machata <petrm@...lanox.com>,
"jakub.kicinski@...ronome.com" <jakub.kicinski@...ronome.com>,
"ivecera@...hat.com" <ivecera@...hat.com>,
"roopa@...ulusnetworks.com" <roopa@...ulusnetworks.com>,
"nikolay@...ulusnetworks.com" <nikolay@...ulusnetworks.com>,
"andrew@...n.ch" <andrew@...n.ch>,
"vivien.didelot@...oirfairelinux.com"
<vivien.didelot@...oirfairelinux.com>,
"f.fainelli@...il.com" <f.fainelli@...il.com>,
"stephen@...workplumber.org" <stephen@...workplumber.org>,
"bridge@...ts.linux-foundation.org"
<bridge@...ts.linux-foundation.org>, mlxsw <mlxsw@...lanox.com>,
Ido Schimmel <idosch@...lanox.com>
Subject: [PATCH net-next v2 08/18] mlxsw: spectrum_nve: Implement VxLAN
operations
The common NVE core expects each encapsulation type to implement a
certain set of operations that are specific to this type and the
currently used ASIC. These operations include things such as the ability
to determine whether a certain NVE configuration can be offloaded and
ASIC-specific initialization for this type.
Implement these operations for VxLAN on the Spectrum ASIC. Spectrum-2
support will be added by a future patchset.
Signed-off-by: Ido Schimmel <idosch@...lanox.com>
Reviewed-by: Petr Machata <petrm@...lanox.com>
---
.../mellanox/mlxsw/spectrum_nve_vxlan.c | 190 +++++++++++++++++-
1 file changed, 188 insertions(+), 2 deletions(-)
diff --git a/drivers/net/ethernet/mellanox/mlxsw/spectrum_nve_vxlan.c b/drivers/net/ethernet/mellanox/mlxsw/spectrum_nve_vxlan.c
index 4abc4d8a1e68..d21c7be5b1c9 100644
--- a/drivers/net/ethernet/mellanox/mlxsw/spectrum_nve_vxlan.c
+++ b/drivers/net/ethernet/mellanox/mlxsw/spectrum_nve_vxlan.c
@@ -3,30 +3,216 @@
#include <linux/netdevice.h>
#include <linux/netlink.h>
+#include <linux/random.h>
+#include <net/vxlan.h>
+#include "reg.h"
#include "spectrum_nve.h"
+/* Eth (18B) | IPv6 (40B) | UDP (8B) | VxLAN (8B) | Eth (14B) | IPv6 (40B)
+ *
+ * In the worst case - where we have a VLAN tag on the outer Ethernet
+ * header and IPv6 in overlay and underlay - we need to parse 128 bytes
+ */
+#define MLXSW_SP_NVE_VXLAN_PARSING_DEPTH 128
+#define MLXSW_SP_NVE_DEFAULT_PARSING_DEPTH 96
+
+#define MLXSW_SP_NVE_VXLAN_SUPPORTED_FLAGS VXLAN_F_UDP_ZERO_CSUM_TX
+
static bool mlxsw_sp1_nve_vxlan_can_offload(const struct mlxsw_sp_nve *nve,
const struct net_device *dev,
struct netlink_ext_ack *extack)
{
- return false;
+ struct vxlan_dev *vxlan = netdev_priv(dev);
+ struct vxlan_config *cfg = &vxlan->cfg;
+
+ if (cfg->saddr.sa.sa_family != AF_INET) {
+ NL_SET_ERR_MSG_MOD(extack, "VxLAN: Only IPv4 underlay is supported");
+ return false;
+ }
+
+ if (vxlan_addr_multicast(&cfg->remote_ip)) {
+ NL_SET_ERR_MSG_MOD(extack, "VxLAN: Multicast destination IP is not supported");
+ return false;
+ }
+
+ if (vxlan_addr_any(&cfg->saddr)) {
+ NL_SET_ERR_MSG_MOD(extack, "VxLAN: Source address must be specified");
+ return false;
+ }
+
+ if (cfg->remote_ifindex) {
+ NL_SET_ERR_MSG_MOD(extack, "VxLAN: Local interface is not supported");
+ return false;
+ }
+
+ if (cfg->port_min || cfg->port_max) {
+ NL_SET_ERR_MSG_MOD(extack, "VxLAN: Only default UDP source port range is supported");
+ return false;
+ }
+
+ if (cfg->tos != 1) {
+ NL_SET_ERR_MSG_MOD(extack, "VxLAN: TOS must be configured to inherit");
+ return false;
+ }
+
+ if (cfg->flags & VXLAN_F_TTL_INHERIT) {
+ NL_SET_ERR_MSG_MOD(extack, "VxLAN: TTL must not be configured to inherit");
+ return false;
+ }
+
+ if (cfg->flags & VXLAN_F_LEARN) {
+ NL_SET_ERR_MSG_MOD(extack, "VxLAN: Learning is not supported");
+ return false;
+ }
+
+ if (!(cfg->flags & VXLAN_F_UDP_ZERO_CSUM_TX)) {
+ NL_SET_ERR_MSG_MOD(extack, "VxLAN: UDP checksum is not supported");
+ return false;
+ }
+
+ if (cfg->flags & ~MLXSW_SP_NVE_VXLAN_SUPPORTED_FLAGS) {
+ NL_SET_ERR_MSG_MOD(extack, "VxLAN: Unsupported flag");
+ return false;
+ }
+
+ if (cfg->ttl == 0) {
+ NL_SET_ERR_MSG_MOD(extack, "VxLAN: TTL must not be configured to 0");
+ return false;
+ }
+
+ if (cfg->label != 0) {
+ NL_SET_ERR_MSG_MOD(extack, "VxLAN: Flow label must be configured to 0");
+ return false;
+ }
+
+ return true;
}
static void mlxsw_sp_nve_vxlan_config(const struct mlxsw_sp_nve *nve,
const struct net_device *dev,
struct mlxsw_sp_nve_config *config)
{
+ struct vxlan_dev *vxlan = netdev_priv(dev);
+ struct vxlan_config *cfg = &vxlan->cfg;
+
+ config->type = MLXSW_SP_NVE_TYPE_VXLAN;
+ config->ttl = cfg->ttl;
+ config->flowlabel = cfg->label;
+ config->learning_en = cfg->flags & VXLAN_F_LEARN ? 1 : 0;
+ config->ul_tb_id = RT_TABLE_MAIN;
+ config->ul_proto = MLXSW_SP_L3_PROTO_IPV4;
+ config->ul_sip.addr4 = cfg->saddr.sin.sin_addr.s_addr;
+ config->udp_dport = cfg->dst_port;
+}
+
+static int mlxsw_sp_nve_parsing_set(struct mlxsw_sp *mlxsw_sp,
+ unsigned int parsing_depth,
+ __be16 udp_dport)
+{
+ char mprs_pl[MLXSW_REG_MPRS_LEN];
+
+ mlxsw_reg_mprs_pack(mprs_pl, parsing_depth, be16_to_cpu(udp_dport));
+ return mlxsw_reg_write(mlxsw_sp->core, MLXSW_REG(mprs), mprs_pl);
+}
+
+static int
+mlxsw_sp1_nve_vxlan_config_set(struct mlxsw_sp *mlxsw_sp,
+ const struct mlxsw_sp_nve_config *config)
+{
+ char tngcr_pl[MLXSW_REG_TNGCR_LEN];
+ u16 ul_vr_id;
+ u8 udp_sport;
+ int err;
+
+ err = mlxsw_sp_router_tb_id_vr_id(mlxsw_sp, config->ul_tb_id,
+ &ul_vr_id);
+ if (err)
+ return err;
+
+ mlxsw_reg_tngcr_pack(tngcr_pl, MLXSW_REG_TNGCR_TYPE_VXLAN, true,
+ config->ttl);
+ /* VxLAN driver's default UDP source port range is 32768 (0x8000)
+ * to 60999 (0xee47). Set the upper 8 bits of the UDP source port
+ * to a random number between 0x80 and 0xee
+ */
+ get_random_bytes(&udp_sport, sizeof(udp_sport));
+ udp_sport = (udp_sport % (0xee - 0x80 + 1)) + 0x80;
+ mlxsw_reg_tngcr_nve_udp_sport_prefix_set(tngcr_pl, udp_sport);
+ mlxsw_reg_tngcr_learn_enable_set(tngcr_pl, config->learning_en);
+ mlxsw_reg_tngcr_underlay_virtual_router_set(tngcr_pl, ul_vr_id);
+ mlxsw_reg_tngcr_usipv4_set(tngcr_pl, be32_to_cpu(config->ul_sip.addr4));
+
+ return mlxsw_reg_write(mlxsw_sp->core, MLXSW_REG(tngcr), tngcr_pl);
+}
+
+static void mlxsw_sp1_nve_vxlan_config_clear(struct mlxsw_sp *mlxsw_sp)
+{
+ char tngcr_pl[MLXSW_REG_TNGCR_LEN];
+
+ mlxsw_reg_tngcr_pack(tngcr_pl, MLXSW_REG_TNGCR_TYPE_VXLAN, false, 0);
+
+ mlxsw_reg_write(mlxsw_sp->core, MLXSW_REG(tngcr), tngcr_pl);
+}
+
+static int mlxsw_sp1_nve_vxlan_rtdp_set(struct mlxsw_sp *mlxsw_sp,
+ unsigned int tunnel_index)
+{
+ char rtdp_pl[MLXSW_REG_RTDP_LEN];
+
+ mlxsw_reg_rtdp_pack(rtdp_pl, MLXSW_REG_RTDP_TYPE_NVE, tunnel_index);
+
+ return mlxsw_reg_write(mlxsw_sp->core, MLXSW_REG(rtdp), rtdp_pl);
}
static int mlxsw_sp1_nve_vxlan_init(struct mlxsw_sp_nve *nve,
const struct mlxsw_sp_nve_config *config)
{
- return -EOPNOTSUPP;
+ struct mlxsw_sp *mlxsw_sp = nve->mlxsw_sp;
+ int err;
+
+ err = mlxsw_sp_nve_parsing_set(mlxsw_sp,
+ MLXSW_SP_NVE_VXLAN_PARSING_DEPTH,
+ config->udp_dport);
+ if (err)
+ return err;
+
+ err = mlxsw_sp1_nve_vxlan_config_set(mlxsw_sp, config);
+ if (err)
+ goto err_config_set;
+
+ err = mlxsw_sp1_nve_vxlan_rtdp_set(mlxsw_sp, nve->tunnel_index);
+ if (err)
+ goto err_rtdp_set;
+
+ err = mlxsw_sp_router_nve_promote_decap(mlxsw_sp, config->ul_tb_id,
+ config->ul_proto,
+ &config->ul_sip,
+ nve->tunnel_index);
+ if (err)
+ goto err_promote_decap;
+
+ return 0;
+
+err_promote_decap:
+err_rtdp_set:
+ mlxsw_sp1_nve_vxlan_config_clear(mlxsw_sp);
+err_config_set:
+ mlxsw_sp_nve_parsing_set(mlxsw_sp, MLXSW_SP_NVE_DEFAULT_PARSING_DEPTH,
+ config->udp_dport);
+ return err;
}
static void mlxsw_sp1_nve_vxlan_fini(struct mlxsw_sp_nve *nve)
{
+ struct mlxsw_sp_nve_config *config = &nve->config;
+ struct mlxsw_sp *mlxsw_sp = nve->mlxsw_sp;
+
+ mlxsw_sp_router_nve_demote_decap(mlxsw_sp, config->ul_tb_id,
+ config->ul_proto, &config->ul_sip);
+ mlxsw_sp1_nve_vxlan_config_clear(mlxsw_sp);
+ mlxsw_sp_nve_parsing_set(mlxsw_sp, MLXSW_SP_NVE_DEFAULT_PARSING_DEPTH,
+ config->udp_dport);
}
const struct mlxsw_sp_nve_ops mlxsw_sp1_nve_vxlan_ops = {
--
2.17.2
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