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// SPDX-License-Identifier: (GPL-2.0+ OR BSD-3-Clause)
#include "dpaa2-eth.h"
/* Copyright 2020 NXP
*/
#define DPAA2_ETH_TRAP_DROP(_id, _group_id) \
DEVLINK_TRAP_GENERIC(DROP, DROP, _id, \
DEVLINK_TRAP_GROUP_GENERIC_ID_##_group_id, 0)
static const struct devlink_trap_group dpaa2_eth_trap_groups_arr[] = {
DEVLINK_TRAP_GROUP_GENERIC(PARSER_ERROR_DROPS, 0),
};
static const struct devlink_trap dpaa2_eth_traps_arr[] = {
DPAA2_ETH_TRAP_DROP(VXLAN_PARSING, PARSER_ERROR_DROPS),
DPAA2_ETH_TRAP_DROP(LLC_SNAP_PARSING, PARSER_ERROR_DROPS),
DPAA2_ETH_TRAP_DROP(VLAN_PARSING, PARSER_ERROR_DROPS),
DPAA2_ETH_TRAP_DROP(PPPOE_PPP_PARSING, PARSER_ERROR_DROPS),
DPAA2_ETH_TRAP_DROP(MPLS_PARSING, PARSER_ERROR_DROPS),
DPAA2_ETH_TRAP_DROP(ARP_PARSING, PARSER_ERROR_DROPS),
DPAA2_ETH_TRAP_DROP(IP_1_PARSING, PARSER_ERROR_DROPS),
DPAA2_ETH_TRAP_DROP(IP_N_PARSING, PARSER_ERROR_DROPS),
DPAA2_ETH_TRAP_DROP(GRE_PARSING, PARSER_ERROR_DROPS),
DPAA2_ETH_TRAP_DROP(UDP_PARSING, PARSER_ERROR_DROPS),
DPAA2_ETH_TRAP_DROP(TCP_PARSING, PARSER_ERROR_DROPS),
DPAA2_ETH_TRAP_DROP(IPSEC_PARSING, PARSER_ERROR_DROPS),
DPAA2_ETH_TRAP_DROP(SCTP_PARSING, PARSER_ERROR_DROPS),
DPAA2_ETH_TRAP_DROP(DCCP_PARSING, PARSER_ERROR_DROPS),
DPAA2_ETH_TRAP_DROP(GTP_PARSING, PARSER_ERROR_DROPS),
DPAA2_ETH_TRAP_DROP(ESP_PARSING, PARSER_ERROR_DROPS),
};
static int dpaa2_eth_dl_info_get(struct devlink *devlink,
struct devlink_info_req *req,
struct netlink_ext_ack *extack)
{
struct dpaa2_eth_devlink_priv *dl_priv = devlink_priv(devlink);
struct dpaa2_eth_priv *priv = dl_priv->dpaa2_priv;
char buf[10];
int err;
err = devlink_info_driver_name_put(req, KBUILD_MODNAME);
if (err)
return err;
scnprintf(buf, 10, "%d.%d", priv->dpni_ver_major, priv->dpni_ver_minor);
err = devlink_info_version_running_put(req, "dpni", buf);
if (err)
return err;
return 0;
}
static struct dpaa2_eth_trap_item *
dpaa2_eth_dl_trap_item_lookup(struct dpaa2_eth_priv *priv, u16 trap_id)
{
struct dpaa2_eth_trap_data *dpaa2_eth_trap_data = priv->trap_data;
int i;
for (i = 0; i < ARRAY_SIZE(dpaa2_eth_traps_arr); i++) {
if (dpaa2_eth_traps_arr[i].id == trap_id)
return &dpaa2_eth_trap_data->trap_items_arr[i];
}
return NULL;
}
struct dpaa2_eth_trap_item *dpaa2_eth_dl_get_trap(struct dpaa2_eth_priv *priv,
struct dpaa2_fapr *fapr)
{
static const struct dpaa2_faf_error_bit {
int position;
enum devlink_trap_generic_id trap_id;
} faf_bits[] = {
{ .position = 5, .trap_id = DEVLINK_TRAP_GENERIC_ID_VXLAN_PARSING },
{ .position = 20, .trap_id = DEVLINK_TRAP_GENERIC_ID_LLC_SNAP_PARSING },
{ .position = 24, .trap_id = DEVLINK_TRAP_GENERIC_ID_VLAN_PARSING },
{ .position = 26, .trap_id = DEVLINK_TRAP_GENERIC_ID_PPPOE_PPP_PARSING },
{ .position = 29, .trap_id = DEVLINK_TRAP_GENERIC_ID_MPLS_PARSING },
{ .position = 31, .trap_id = DEVLINK_TRAP_GENERIC_ID_ARP_PARSING },
{ .position = 52, .trap_id = DEVLINK_TRAP_GENERIC_ID_IP_1_PARSING },
{ .position = 61, .trap_id = DEVLINK_TRAP_GENERIC_ID_IP_N_PARSING },
{ .position = 67, .trap_id = DEVLINK_TRAP_GENERIC_ID_GRE_PARSING },
{ .position = 71, .trap_id = DEVLINK_TRAP_GENERIC_ID_UDP_PARSING },
{ .position = 76, .trap_id = DEVLINK_TRAP_GENERIC_ID_TCP_PARSING },
{ .position = 80, .trap_id = DEVLINK_TRAP_GENERIC_ID_IPSEC_PARSING },
{ .position = 82, .trap_id = DEVLINK_TRAP_GENERIC_ID_SCTP_PARSING },
{ .position = 84, .trap_id = DEVLINK_TRAP_GENERIC_ID_DCCP_PARSING },
{ .position = 88, .trap_id = DEVLINK_TRAP_GENERIC_ID_GTP_PARSING },
{ .position = 90, .trap_id = DEVLINK_TRAP_GENERIC_ID_ESP_PARSING },
};
u64 faf_word;
u64 mask;
int i;
for (i = 0; i < ARRAY_SIZE(faf_bits); i++) {
if (faf_bits[i].position < 32) {
/* Low part of FAF.
* position ranges from 31 to 0, mask from 0 to 31.
*/
mask = 1ull << (31 - faf_bits[i].position);
faf_word = __le32_to_cpu(fapr->faf_lo);
} else {
/* High part of FAF.
* position ranges from 95 to 32, mask from 0 to 63.
*/
mask = 1ull << (63 - (faf_bits[i].position - 32));
faf_word = __le64_to_cpu(fapr->faf_hi);
}
if (faf_word & mask)
return dpaa2_eth_dl_trap_item_lookup(priv, faf_bits[i].trap_id);
}
return NULL;
}
static int dpaa2_eth_dl_trap_init(struct devlink *devlink,
const struct devlink_trap *trap,
void *trap_ctx)
{
struct dpaa2_eth_devlink_priv *dl_priv = devlink_priv(devlink);
struct dpaa2_eth_priv *priv = dl_priv->dpaa2_priv;
struct dpaa2_eth_trap_item *dpaa2_eth_trap_item;
dpaa2_eth_trap_item = dpaa2_eth_dl_trap_item_lookup(priv, trap->id);
if (WARN_ON(!dpaa2_eth_trap_item))
return -ENOENT;
dpaa2_eth_trap_item->trap_ctx = trap_ctx;
return 0;
}
static int dpaa2_eth_dl_trap_action_set(struct devlink *devlink,
const struct devlink_trap *trap,
enum devlink_trap_action action,
struct netlink_ext_ack *extack)
{
/* No support for changing the action of an independent packet trap,
* only per trap group - parser error drops
*/
NL_SET_ERR_MSG_MOD(extack,
"Cannot change trap action independently of group");
return -EOPNOTSUPP;
}
static int dpaa2_eth_dl_trap_group_action_set(struct devlink *devlink,
const struct devlink_trap_group *group,
enum devlink_trap_action action,
struct netlink_ext_ack *extack)
{
struct dpaa2_eth_devlink_priv *dl_priv = devlink_priv(devlink);
struct dpaa2_eth_priv *priv = dl_priv->dpaa2_priv;
struct net_device *net_dev = priv->net_dev;
struct device *dev = net_dev->dev.parent;
struct dpni_error_cfg err_cfg = {0};
int err;
if (group->id != DEVLINK_TRAP_GROUP_GENERIC_ID_PARSER_ERROR_DROPS)
return -EOPNOTSUPP;
/* Configure handling of frames marked as errors from the parser */
err_cfg.errors = DPAA2_FAS_RX_ERR_MASK;
err_cfg.set_frame_annotation = 1;
switch (action) {
case DEVLINK_TRAP_ACTION_DROP:
err_cfg.error_action = DPNI_ERROR_ACTION_DISCARD;
break;
case DEVLINK_TRAP_ACTION_TRAP:
err_cfg.error_action = DPNI_ERROR_ACTION_SEND_TO_ERROR_QUEUE;
break;
default:
return -EOPNOTSUPP;
}
err = dpni_set_errors_behavior(priv->mc_io, 0, priv->mc_token, &err_cfg);
if (err) {
dev_err(dev, "dpni_set_errors_behavior failed\n");
return err;
}
return 0;
}
static const struct devlink_ops dpaa2_eth_devlink_ops = {
.info_get = dpaa2_eth_dl_info_get,
.trap_init = dpaa2_eth_dl_trap_init,
.trap_action_set = dpaa2_eth_dl_trap_action_set,
.trap_group_action_set = dpaa2_eth_dl_trap_group_action_set,
};
int dpaa2_eth_dl_alloc(struct dpaa2_eth_priv *priv)
{
struct net_device *net_dev = priv->net_dev;
struct device *dev = net_dev->dev.parent;
struct dpaa2_eth_devlink_priv *dl_priv;
priv->devlink =
devlink_alloc(&dpaa2_eth_devlink_ops, sizeof(*dl_priv), dev);
if (!priv->devlink) {
dev_err(dev, "devlink_alloc failed\n");
return -ENOMEM;
}
dl_priv = devlink_priv(priv->devlink);
dl_priv->dpaa2_priv = priv;
return 0;
}
void dpaa2_eth_dl_free(struct dpaa2_eth_priv *priv)
{
devlink_free(priv->devlink);
}
void dpaa2_eth_dl_register(struct dpaa2_eth_priv *priv)
{
devlink_register(priv->devlink);
}
void dpaa2_eth_dl_unregister(struct dpaa2_eth_priv *priv)
{
devlink_unregister(priv->devlink);
}
int dpaa2_eth_dl_port_add(struct dpaa2_eth_priv *priv)
{
struct devlink_port *devlink_port = &priv->devlink_port;
struct devlink_port_attrs attrs = {};
attrs.flavour = DEVLINK_PORT_FLAVOUR_PHYSICAL;
devlink_port_attrs_set(devlink_port, &attrs);
return devlink_port_register(priv->devlink, devlink_port, 0);
}
void dpaa2_eth_dl_port_del(struct dpaa2_eth_priv *priv)
{
struct devlink_port *devlink_port = &priv->devlink_port;
devlink_port_unregister(devlink_port);
}
int dpaa2_eth_dl_traps_register(struct dpaa2_eth_priv *priv)
{
struct dpaa2_eth_trap_data *dpaa2_eth_trap_data;
struct net_device *net_dev = priv->net_dev;
struct device *dev = net_dev->dev.parent;
int err;
dpaa2_eth_trap_data = kzalloc(sizeof(*dpaa2_eth_trap_data), GFP_KERNEL);
if (!dpaa2_eth_trap_data)
return -ENOMEM;
priv->trap_data = dpaa2_eth_trap_data;
dpaa2_eth_trap_data->trap_items_arr = kcalloc(ARRAY_SIZE(dpaa2_eth_traps_arr),
sizeof(struct dpaa2_eth_trap_item),
GFP_KERNEL);
if (!dpaa2_eth_trap_data->trap_items_arr) {
err = -ENOMEM;
goto trap_data_free;
}
err = devlink_trap_groups_register(priv->devlink, dpaa2_eth_trap_groups_arr,
ARRAY_SIZE(dpaa2_eth_trap_groups_arr));
if (err) {
dev_err(dev, "devlink_trap_groups_register() = %d\n", err);
goto trap_items_arr_free;
}
err = devlink_traps_register(priv->devlink, dpaa2_eth_traps_arr,
ARRAY_SIZE(dpaa2_eth_traps_arr), priv);
if (err) {
dev_err(dev, "devlink_traps_register() = %d\n", err);
goto trap_groups_unregiser;
}
return 0;
trap_groups_unregiser:
devlink_trap_groups_unregister(priv->devlink, dpaa2_eth_trap_groups_arr,
ARRAY_SIZE(dpaa2_eth_trap_groups_arr));
trap_items_arr_free:
kfree(dpaa2_eth_trap_data->trap_items_arr);
trap_data_free:
kfree(dpaa2_eth_trap_data);
priv->trap_data = NULL;
return err;
}
void dpaa2_eth_dl_traps_unregister(struct dpaa2_eth_priv *priv)
{
devlink_traps_unregister(priv->devlink, dpaa2_eth_traps_arr,
ARRAY_SIZE(dpaa2_eth_traps_arr));
devlink_trap_groups_unregister(priv->devlink, dpaa2_eth_trap_groups_arr,
ARRAY_SIZE(dpaa2_eth_trap_groups_arr));
kfree(priv->trap_data->trap_items_arr);
kfree(priv->trap_data);
}
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