// 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);
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_cfg_dflt_vsi(uplink_vsi->port_info, uplink_vsi->idx, true,
ICE_FLTR_RX))
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_security(uplink_vsi, ice_vsi_ctx_set_allow_override))
goto err_override_uplink;
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:
ice_vsi_update_security(uplink_vsi, ice_vsi_ctx_clear_allow_override);
err_override_uplink:
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) {
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);
ice_vsi_update_security(uplink_vsi, ice_vsi_ctx_clear_allow_override);
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_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 ice_repr *repr = ice_repr_create_vf(vf);
struct devlink *devlink = priv_to_devlink(pf);
int err;
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);
xa_erase(&pf->eswitch.reprs, repr->id);
if (xa_empty(&pf->eswitch.reprs))
ice_eswitch_disable_switchdev(pf);
ice_eswitch_release_repr(pf, repr);
repr->ops.rem(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;
}
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