1 files changed, 635 insertions, 0 deletions
diff --git a/drivers/net/ethernet/intel/ice/ice_eswitch.c b/drivers/net/ethernet/intel/ice/ice_eswitch.c
new file mode 100644
index 000000000000..2e4f0969035f
--- /dev/null
+++ b/drivers/net/ethernet/intel/ice/ice_eswitch.c
@@ -0,0 +1,635 @@
+// SPDX-License-Identifier: GPL-2.0
+/* Copyright (C) 2019-2021, Intel Corporation. */
+
+#include "ice.h"
+#include "ice_lib.h"
+#include "ice_eswitch.h"
+#include "ice_eswitch_br.h"
+#include "ice_fltr.h"
+#include "ice_repr.h"
+#include "devlink/devlink.h"
+#include "ice_tc_lib.h"
+
+/**
+ * ice_eswitch_setup_env - configure eswitch HW filters
+ * @pf: pointer to PF struct
+ *
+ * This function adds HW filters configuration specific for switchdev
+ * mode.
+ */
+static int ice_eswitch_setup_env(struct ice_pf *pf)
+{
+	struct ice_vsi *uplink_vsi = pf->eswitch.uplink_vsi;
+	struct net_device *netdev = uplink_vsi->netdev;
+	bool if_running = netif_running(netdev);
+	struct ice_vsi_vlan_ops *vlan_ops;
+
+	if (if_running && !test_and_set_bit(ICE_VSI_DOWN, uplink_vsi->state))
+		if (ice_down(uplink_vsi))
+			return -ENODEV;
+
+	ice_remove_vsi_fltr(&pf->hw, uplink_vsi->idx);
+	ice_vsi_cfg_sw_lldp(uplink_vsi, true, false);
+
+	netif_addr_lock_bh(netdev);
+	__dev_uc_unsync(netdev, NULL);
+	__dev_mc_unsync(netdev, NULL);
+	netif_addr_unlock_bh(netdev);
+
+	if (ice_vsi_add_vlan_zero(uplink_vsi))
+		goto err_vlan_zero;
+
+	if (ice_set_dflt_vsi(uplink_vsi))
+		goto err_def_rx;
+
+	if (ice_cfg_dflt_vsi(uplink_vsi->port_info, uplink_vsi->idx, true,
+			     ICE_FLTR_TX))
+		goto err_def_tx;
+
+	vlan_ops = ice_get_compat_vsi_vlan_ops(uplink_vsi);
+	if (vlan_ops->dis_rx_filtering(uplink_vsi))
+		goto err_vlan_filtering;
+
+	if (ice_vsi_update_local_lb(uplink_vsi, true))
+		goto err_override_local_lb;
+
+	if (if_running && ice_up(uplink_vsi))
+		goto err_up;
+
+	return 0;
+
+err_up:
+	ice_vsi_update_local_lb(uplink_vsi, false);
+err_override_local_lb:
+	vlan_ops->ena_rx_filtering(uplink_vsi);
+err_vlan_filtering:
+	ice_cfg_dflt_vsi(uplink_vsi->port_info, uplink_vsi->idx, false,
+			 ICE_FLTR_TX);
+err_def_tx:
+	ice_cfg_dflt_vsi(uplink_vsi->port_info, uplink_vsi->idx, false,
+			 ICE_FLTR_RX);
+err_def_rx:
+	ice_vsi_del_vlan_zero(uplink_vsi);
+err_vlan_zero:
+	ice_fltr_add_mac_and_broadcast(uplink_vsi,
+				       uplink_vsi->port_info->mac.perm_addr,
+				       ICE_FWD_TO_VSI);
+	if (if_running)
+		ice_up(uplink_vsi);
+
+	return -ENODEV;
+}
+
+/**
+ * ice_eswitch_release_repr - clear PR VSI configuration
+ * @pf: poiner to PF struct
+ * @repr: pointer to PR
+ */
+static void
+ice_eswitch_release_repr(struct ice_pf *pf, struct ice_repr *repr)
+{
+	struct ice_vsi *vsi = repr->src_vsi;
+
+	/* Skip representors that aren't configured */
+	if (!repr->dst)
+		return;
+
+	ice_vsi_update_security(vsi, ice_vsi_ctx_set_antispoof);
+	metadata_dst_free(repr->dst);
+	repr->dst = NULL;
+	ice_fltr_add_mac_and_broadcast(vsi, repr->parent_mac,
+				       ICE_FWD_TO_VSI);
+}
+
+/**
+ * ice_eswitch_setup_repr - configure PR to run in switchdev mode
+ * @pf: pointer to PF struct
+ * @repr: pointer to PR struct
+ */
+static int ice_eswitch_setup_repr(struct ice_pf *pf, struct ice_repr *repr)
+{
+	struct ice_vsi *uplink_vsi = pf->eswitch.uplink_vsi;
+	struct ice_vsi *vsi = repr->src_vsi;
+	struct metadata_dst *dst;
+
+	repr->dst = metadata_dst_alloc(0, METADATA_HW_PORT_MUX,
+				       GFP_KERNEL);
+	if (!repr->dst)
+		return -ENOMEM;
+
+	netif_keep_dst(uplink_vsi->netdev);
+
+	dst = repr->dst;
+	dst->u.port_info.port_id = vsi->vsi_num;
+	dst->u.port_info.lower_dev = uplink_vsi->netdev;
+
+	return 0;
+}
+
+/**
+ * ice_eswitch_cfg_vsi - configure VSI to work in slow-path
+ * @vsi: VSI structure of representee
+ * @mac: representee MAC
+ *
+ * Return: 0 on success, non-zero on error.
+ */
+int ice_eswitch_cfg_vsi(struct ice_vsi *vsi, const u8 *mac)
+{
+	int err;
+
+	ice_remove_vsi_fltr(&vsi->back->hw, vsi->idx);
+
+	err = ice_vsi_update_security(vsi, ice_vsi_ctx_clear_antispoof);
+	if (err)
+		goto err_update_security;
+
+	err = ice_vsi_add_vlan_zero(vsi);
+	if (err)
+		goto err_vlan_zero;
+
+	return 0;
+
+err_vlan_zero:
+	ice_vsi_update_security(vsi, ice_vsi_ctx_set_antispoof);
+err_update_security:
+	ice_fltr_add_mac_and_broadcast(vsi, mac, ICE_FWD_TO_VSI);
+
+	return err;
+}
+
+/**
+ * ice_eswitch_decfg_vsi - unroll changes done to VSI for switchdev
+ * @vsi: VSI structure of representee
+ * @mac: representee MAC
+ */
+void ice_eswitch_decfg_vsi(struct ice_vsi *vsi, const u8 *mac)
+{
+	ice_vsi_update_security(vsi, ice_vsi_ctx_set_antispoof);
+	ice_fltr_add_mac_and_broadcast(vsi, mac, ICE_FWD_TO_VSI);
+}
+
+/**
+ * ice_eswitch_update_repr - reconfigure port representor
+ * @repr_id: representor ID
+ * @vsi: VSI for which port representor is configured
+ */
+void ice_eswitch_update_repr(unsigned long *repr_id, struct ice_vsi *vsi)
+{
+	struct ice_pf *pf = vsi->back;
+	struct ice_repr *repr;
+	int err;
+
+	if (!ice_is_switchdev_running(pf))
+		return;
+
+	repr = xa_load(&pf->eswitch.reprs, *repr_id);
+	if (!repr)
+		return;
+
+	repr->src_vsi = vsi;
+	repr->dst->u.port_info.port_id = vsi->vsi_num;
+
+	if (repr->br_port)
+		repr->br_port->vsi = vsi;
+
+	err = ice_eswitch_cfg_vsi(vsi, repr->parent_mac);
+	if (err)
+		dev_err(ice_pf_to_dev(pf), "Failed to update VSI of port representor %d",
+			repr->id);
+
+	/* The VSI number is different, reload the PR with new id */
+	if (repr->id != vsi->vsi_num) {
+		xa_erase(&pf->eswitch.reprs, repr->id);
+		repr->id = vsi->vsi_num;
+		if (xa_insert(&pf->eswitch.reprs, repr->id, repr, GFP_KERNEL))
+			dev_err(ice_pf_to_dev(pf), "Failed to reload port representor %d",
+				repr->id);
+		*repr_id = repr->id;
+	}
+}
+
+/**
+ * ice_eswitch_port_start_xmit - callback for packets transmit
+ * @skb: send buffer
+ * @netdev: network interface device structure
+ *
+ * Returns NETDEV_TX_OK if sent, else an error code
+ */
+netdev_tx_t
+ice_eswitch_port_start_xmit(struct sk_buff *skb, struct net_device *netdev)
+{
+	struct ice_repr *repr = ice_netdev_to_repr(netdev);
+	unsigned int len = skb->len;
+	int ret;
+
+	skb_dst_drop(skb);
+	dst_hold((struct dst_entry *)repr->dst);
+	skb_dst_set(skb, (struct dst_entry *)repr->dst);
+	skb->dev = repr->dst->u.port_info.lower_dev;
+
+	ret = dev_queue_xmit(skb);
+	ice_repr_inc_tx_stats(repr, len, ret);
+
+	return ret;
+}
+
+/**
+ * ice_eswitch_set_target_vsi - set eswitch context in Tx context descriptor
+ * @skb: pointer to send buffer
+ * @off: pointer to offload struct
+ */
+void
+ice_eswitch_set_target_vsi(struct sk_buff *skb,
+			   struct ice_tx_offload_params *off)
+{
+	struct metadata_dst *dst = skb_metadata_dst(skb);
+	u64 cd_cmd, dst_vsi;
+
+	if (!dst) {
+		struct ethhdr *eth = (struct ethhdr *)skb_mac_header(skb);
+
+		if (unlikely(eth->h_proto == htons(ETH_P_LLDP)))
+			return;
+		cd_cmd = ICE_TX_CTX_DESC_SWTCH_UPLINK << ICE_TXD_CTX_QW1_CMD_S;
+		off->cd_qw1 |= (cd_cmd | ICE_TX_DESC_DTYPE_CTX);
+	} else {
+		cd_cmd = ICE_TX_CTX_DESC_SWTCH_VSI << ICE_TXD_CTX_QW1_CMD_S;
+		dst_vsi = FIELD_PREP(ICE_TXD_CTX_QW1_VSI_M,
+				     dst->u.port_info.port_id);
+		off->cd_qw1 = cd_cmd | dst_vsi | ICE_TX_DESC_DTYPE_CTX;
+	}
+}
+
+/**
+ * ice_eswitch_release_env - clear eswitch HW filters
+ * @pf: pointer to PF struct
+ *
+ * This function removes HW filters configuration specific for switchdev
+ * mode and restores default legacy mode settings.
+ */
+static void ice_eswitch_release_env(struct ice_pf *pf)
+{
+	struct ice_vsi *uplink_vsi = pf->eswitch.uplink_vsi;
+	struct ice_vsi_vlan_ops *vlan_ops;
+
+	vlan_ops = ice_get_compat_vsi_vlan_ops(uplink_vsi);
+
+	ice_vsi_update_local_lb(uplink_vsi, false);
+	vlan_ops->ena_rx_filtering(uplink_vsi);
+	ice_cfg_dflt_vsi(uplink_vsi->port_info, uplink_vsi->idx, false,
+			 ICE_FLTR_TX);
+	ice_cfg_dflt_vsi(uplink_vsi->port_info, uplink_vsi->idx, false,
+			 ICE_FLTR_RX);
+	ice_fltr_add_mac_and_broadcast(uplink_vsi,
+				       uplink_vsi->port_info->mac.perm_addr,
+				       ICE_FWD_TO_VSI);
+	ice_vsi_cfg_sw_lldp(uplink_vsi, true, true);
+}
+
+/**
+ * ice_eswitch_enable_switchdev - configure eswitch in switchdev mode
+ * @pf: pointer to PF structure
+ */
+static int ice_eswitch_enable_switchdev(struct ice_pf *pf)
+{
+	struct ice_vsi *uplink_vsi;
+
+	uplink_vsi = ice_get_main_vsi(pf);
+	if (!uplink_vsi)
+		return -ENODEV;
+
+	if (netif_is_any_bridge_port(uplink_vsi->netdev)) {
+		dev_err(ice_pf_to_dev(pf),
+			"Uplink port cannot be a bridge port\n");
+		return -EINVAL;
+	}
+
+	pf->eswitch.uplink_vsi = uplink_vsi;
+
+	if (ice_eswitch_setup_env(pf))
+		return -ENODEV;
+
+	if (ice_eswitch_br_offloads_init(pf))
+		goto err_br_offloads;
+
+	pf->eswitch.is_running = true;
+
+	return 0;
+
+err_br_offloads:
+	ice_eswitch_release_env(pf);
+	return -ENODEV;
+}
+
+/**
+ * ice_eswitch_disable_switchdev - disable eswitch resources
+ * @pf: pointer to PF structure
+ */
+static void ice_eswitch_disable_switchdev(struct ice_pf *pf)
+{
+	ice_eswitch_br_offloads_deinit(pf);
+	ice_eswitch_release_env(pf);
+
+	pf->eswitch.is_running = false;
+}
+
+/**
+ * ice_eswitch_mode_set - set new eswitch mode
+ * @devlink: pointer to devlink structure
+ * @mode: eswitch mode to switch to
+ * @extack: pointer to extack structure
+ */
+int
+ice_eswitch_mode_set(struct devlink *devlink, u16 mode,
+		     struct netlink_ext_ack *extack)
+{
+	struct ice_pf *pf = devlink_priv(devlink);
+
+	if (pf->eswitch_mode == mode)
+		return 0;
+
+	if (ice_has_vfs(pf)) {
+		dev_info(ice_pf_to_dev(pf), "Changing eswitch mode is allowed only if there is no VFs created");
+		NL_SET_ERR_MSG_MOD(extack, "Changing eswitch mode is allowed only if there is no VFs created");
+		return -EOPNOTSUPP;
+	}
+
+	switch (mode) {
+	case DEVLINK_ESWITCH_MODE_LEGACY:
+		dev_info(ice_pf_to_dev(pf), "PF %d changed eswitch mode to legacy",
+			 pf->hw.pf_id);
+		xa_destroy(&pf->eswitch.reprs);
+		NL_SET_ERR_MSG_MOD(extack, "Changed eswitch mode to legacy");
+		break;
+	case DEVLINK_ESWITCH_MODE_SWITCHDEV:
+	{
+		if (ice_is_adq_active(pf)) {
+			dev_err(ice_pf_to_dev(pf), "Couldn't change eswitch mode to switchdev - ADQ is active. Delete ADQ configs and try again, e.g. tc qdisc del dev $PF root");
+			NL_SET_ERR_MSG_MOD(extack, "Couldn't change eswitch mode to switchdev - ADQ is active. Delete ADQ configs and try again, e.g. tc qdisc del dev $PF root");
+			return -EOPNOTSUPP;
+		}
+
+		dev_info(ice_pf_to_dev(pf), "PF %d changed eswitch mode to switchdev",
+			 pf->hw.pf_id);
+		xa_init(&pf->eswitch.reprs);
+		NL_SET_ERR_MSG_MOD(extack, "Changed eswitch mode to switchdev");
+		break;
+	}
+	default:
+		NL_SET_ERR_MSG_MOD(extack, "Unknown eswitch mode");
+		return -EINVAL;
+	}
+
+	pf->eswitch_mode = mode;
+	return 0;
+}
+
+/**
+ * ice_eswitch_mode_get - get current eswitch mode
+ * @devlink: pointer to devlink structure
+ * @mode: output parameter for current eswitch mode
+ */
+int ice_eswitch_mode_get(struct devlink *devlink, u16 *mode)
+{
+	struct ice_pf *pf = devlink_priv(devlink);
+
+	*mode = pf->eswitch_mode;
+	return 0;
+}
+
+/**
+ * ice_is_eswitch_mode_switchdev - check if eswitch mode is set to switchdev
+ * @pf: pointer to PF structure
+ *
+ * Returns true if eswitch mode is set to DEVLINK_ESWITCH_MODE_SWITCHDEV,
+ * false otherwise.
+ */
+bool ice_is_eswitch_mode_switchdev(struct ice_pf *pf)
+{
+	return pf->eswitch_mode == DEVLINK_ESWITCH_MODE_SWITCHDEV;
+}
+
+/**
+ * ice_eswitch_start_all_tx_queues - start Tx queues of all port representors
+ * @pf: pointer to PF structure
+ */
+static void ice_eswitch_start_all_tx_queues(struct ice_pf *pf)
+{
+	struct ice_repr *repr;
+	unsigned long id;
+
+	if (test_bit(ICE_DOWN, pf->state))
+		return;
+
+	xa_for_each(&pf->eswitch.reprs, id, repr)
+		ice_repr_start_tx_queues(repr);
+}
+
+/**
+ * ice_eswitch_stop_all_tx_queues - stop Tx queues of all port representors
+ * @pf: pointer to PF structure
+ */
+void ice_eswitch_stop_all_tx_queues(struct ice_pf *pf)
+{
+	struct ice_repr *repr;
+	unsigned long id;
+
+	if (test_bit(ICE_DOWN, pf->state))
+		return;
+
+	xa_for_each(&pf->eswitch.reprs, id, repr)
+		ice_repr_stop_tx_queues(repr);
+}
+
+static void ice_eswitch_stop_reprs(struct ice_pf *pf)
+{
+	ice_eswitch_stop_all_tx_queues(pf);
+}
+
+static void ice_eswitch_start_reprs(struct ice_pf *pf)
+{
+	ice_eswitch_start_all_tx_queues(pf);
+}
+
+static int
+ice_eswitch_attach(struct ice_pf *pf, struct ice_repr *repr, unsigned long *id)
+{
+	int err;
+
+	if (pf->eswitch_mode == DEVLINK_ESWITCH_MODE_LEGACY)
+		return 0;
+
+	if (xa_empty(&pf->eswitch.reprs)) {
+		err = ice_eswitch_enable_switchdev(pf);
+		if (err)
+			return err;
+	}
+
+	ice_eswitch_stop_reprs(pf);
+
+	err = repr->ops.add(repr);
+	if (err)
+		goto err_create_repr;
+
+	err = ice_eswitch_setup_repr(pf, repr);
+	if (err)
+		goto err_setup_repr;
+
+	err = xa_insert(&pf->eswitch.reprs, repr->id, repr, GFP_KERNEL);
+	if (err)
+		goto err_xa_alloc;
+
+	*id = repr->id;
+
+	ice_eswitch_start_reprs(pf);
+
+	return 0;
+
+err_xa_alloc:
+	ice_eswitch_release_repr(pf, repr);
+err_setup_repr:
+	repr->ops.rem(repr);
+err_create_repr:
+	if (xa_empty(&pf->eswitch.reprs))
+		ice_eswitch_disable_switchdev(pf);
+	ice_eswitch_start_reprs(pf);
+
+	return err;
+}
+
+/**
+ * ice_eswitch_attach_vf - attach VF to a eswitch
+ * @pf: pointer to PF structure
+ * @vf: pointer to VF structure to be attached
+ *
+ * During attaching port representor for VF is created.
+ *
+ * Return: zero on success or an error code on failure.
+ */
+int ice_eswitch_attach_vf(struct ice_pf *pf, struct ice_vf *vf)
+{
+	struct devlink *devlink = priv_to_devlink(pf);
+	struct ice_repr *repr;
+	int err;
+
+	if (!ice_is_eswitch_mode_switchdev(pf))
+		return 0;
+
+	repr = ice_repr_create_vf(vf);
+	if (IS_ERR(repr))
+		return PTR_ERR(repr);
+
+	devl_lock(devlink);
+	err = ice_eswitch_attach(pf, repr, &vf->repr_id);
+	if (err)
+		ice_repr_destroy(repr);
+	devl_unlock(devlink);
+
+	return err;
+}
+
+/**
+ * ice_eswitch_attach_sf - attach SF to a eswitch
+ * @pf: pointer to PF structure
+ * @sf: pointer to SF structure to be attached
+ *
+ * During attaching port representor for SF is created.
+ *
+ * Return: zero on success or an error code on failure.
+ */
+int ice_eswitch_attach_sf(struct ice_pf *pf, struct ice_dynamic_port *sf)
+{
+	struct ice_repr *repr = ice_repr_create_sf(sf);
+	int err;
+
+	if (IS_ERR(repr))
+		return PTR_ERR(repr);
+
+	err = ice_eswitch_attach(pf, repr, &sf->repr_id);
+	if (err)
+		ice_repr_destroy(repr);
+
+	return err;
+}
+
+static void ice_eswitch_detach(struct ice_pf *pf, struct ice_repr *repr)
+{
+	ice_eswitch_stop_reprs(pf);
+	repr->ops.rem(repr);
+
+	xa_erase(&pf->eswitch.reprs, repr->id);
+
+	if (xa_empty(&pf->eswitch.reprs))
+		ice_eswitch_disable_switchdev(pf);
+
+	ice_eswitch_release_repr(pf, repr);
+	ice_repr_destroy(repr);
+
+	if (xa_empty(&pf->eswitch.reprs)) {
+		struct devlink *devlink = priv_to_devlink(pf);
+
+		/* since all port representors are destroyed, there is
+		 * no point in keeping the nodes
+		 */
+		ice_devlink_rate_clear_tx_topology(ice_get_main_vsi(pf));
+		devl_rate_nodes_destroy(devlink);
+	} else {
+		ice_eswitch_start_reprs(pf);
+	}
+}
+
+/**
+ * ice_eswitch_detach_vf - detach VF from a eswitch
+ * @pf: pointer to PF structure
+ * @vf: pointer to VF structure to be detached
+ */
+void ice_eswitch_detach_vf(struct ice_pf *pf, struct ice_vf *vf)
+{
+	struct ice_repr *repr = xa_load(&pf->eswitch.reprs, vf->repr_id);
+	struct devlink *devlink = priv_to_devlink(pf);
+
+	if (!repr)
+		return;
+
+	devl_lock(devlink);
+	ice_eswitch_detach(pf, repr);
+	devl_unlock(devlink);
+}
+
+/**
+ * ice_eswitch_detach_sf - detach SF from a eswitch
+ * @pf: pointer to PF structure
+ * @sf: pointer to SF structure to be detached
+ */
+void ice_eswitch_detach_sf(struct ice_pf *pf, struct ice_dynamic_port *sf)
+{
+	struct ice_repr *repr = xa_load(&pf->eswitch.reprs, sf->repr_id);
+
+	if (!repr)
+		return;
+
+	ice_eswitch_detach(pf, repr);
+}
+
+/**
+ * ice_eswitch_get_target - get netdev based on src_vsi from descriptor
+ * @rx_ring: ring used to receive the packet
+ * @rx_desc: descriptor used to get src_vsi value
+ *
+ * Get src_vsi value from descriptor and load correct representor. If it isn't
+ * found return rx_ring->netdev.
+ */
+struct net_device *ice_eswitch_get_target(struct ice_rx_ring *rx_ring,
+					  union ice_32b_rx_flex_desc *rx_desc)
+{
+	struct ice_eswitch *eswitch = &rx_ring->vsi->back->eswitch;
+	struct ice_32b_rx_flex_desc_nic_2 *desc;
+	struct ice_repr *repr;
+
+	desc = (struct ice_32b_rx_flex_desc_nic_2 *)rx_desc;
+	repr = xa_load(&eswitch->reprs, le16_to_cpu(desc->src_vsi));
+	if (!repr)
+		return rx_ring->netdev;
+
+	return repr->netdev;
+}