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aq_macsec.c
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aq_macsec.c
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// SPDX-License-Identifier: GPL-2.0-only
/* Atlantic Network Driver
* Copyright (C) 2020 Marvell International Ltd.
*/
#include "aq_macsec.h"
#if defined(NETIF_F_HW_MACSEC)
#include "aq_nic.h"
#include <linux/rtnetlink.h>
#include "macsec/macsec_api.h"
#define AQ_MACSEC_KEY_LEN_128_BIT 16
#define AQ_MACSEC_KEY_LEN_192_BIT 24
#define AQ_MACSEC_KEY_LEN_256_BIT 32
enum aq_clear_type {
/* update HW configuration */
AQ_CLEAR_HW = BIT(0),
/* update SW configuration (busy bits, pointers) */
AQ_CLEAR_SW = BIT(1),
/* update both HW and SW configuration */
AQ_CLEAR_ALL = AQ_CLEAR_HW | AQ_CLEAR_SW,
};
static int aq_clear_txsc(struct aq_nic_s *nic, const int txsc_idx,
enum aq_clear_type clear_type);
static int aq_clear_txsa(struct aq_nic_s *nic, struct aq_macsec_txsc *aq_txsc,
const int sa_num, enum aq_clear_type clear_type);
static int aq_clear_rxsc(struct aq_nic_s *nic, const int rxsc_idx,
enum aq_clear_type clear_type);
static int aq_clear_rxsa(struct aq_nic_s *nic, struct aq_macsec_rxsc *aq_rxsc,
const int sa_num, enum aq_clear_type clear_type);
static int aq_clear_secy(struct aq_nic_s *nic, const struct macsec_secy *secy,
enum aq_clear_type clear_type);
static int aq_apply_macsec_cfg(struct aq_nic_s *nic);
static int aq_apply_secy_cfg(struct aq_nic_s *nic,
const struct macsec_secy *secy);
static void aq_ether_addr_to_mac(u32 mac[2], const unsigned char *emac)
{
u32 tmp[2] = { 0 };
memcpy(((u8 *)tmp) + 2, emac, ETH_ALEN);
mac[0] = swab32(tmp[1]);
mac[1] = swab32(tmp[0]);
}
/* There's a 1:1 mapping between SecY and TX SC */
static int aq_get_txsc_idx_from_secy(struct aq_macsec_cfg *macsec_cfg,
const struct macsec_secy *secy)
{
int i;
if (unlikely(!secy))
return -1;
for (i = 0; i < AQ_MACSEC_MAX_SC; i++) {
if (macsec_cfg->aq_txsc[i].sw_secy == secy)
return i;
}
return -1;
}
static int aq_get_rxsc_idx_from_rxsc(struct aq_macsec_cfg *macsec_cfg,
const struct macsec_rx_sc *rxsc)
{
int i;
if (unlikely(!rxsc))
return -1;
for (i = 0; i < AQ_MACSEC_MAX_SC; i++) {
if (macsec_cfg->aq_rxsc[i].sw_rxsc == rxsc)
return i;
}
return -1;
}
static int aq_get_txsc_idx_from_sc_idx(const enum aq_macsec_sc_sa sc_sa,
const int sc_idx)
{
switch (sc_sa) {
case aq_macsec_sa_sc_4sa_8sc:
return sc_idx >> 2;
case aq_macsec_sa_sc_2sa_16sc:
return sc_idx >> 1;
case aq_macsec_sa_sc_1sa_32sc:
return sc_idx;
default:
WARN_ONCE(true, "Invalid sc_sa");
}
return -1;
}
/* Rotate keys u32[8] */
static void aq_rotate_keys(u32 (*key)[8], const int key_len)
{
u32 tmp[8] = { 0 };
memcpy(&tmp, key, sizeof(tmp));
memset(*key, 0, sizeof(*key));
if (key_len == AQ_MACSEC_KEY_LEN_128_BIT) {
(*key)[0] = swab32(tmp[3]);
(*key)[1] = swab32(tmp[2]);
(*key)[2] = swab32(tmp[1]);
(*key)[3] = swab32(tmp[0]);
} else if (key_len == AQ_MACSEC_KEY_LEN_192_BIT) {
(*key)[0] = swab32(tmp[5]);
(*key)[1] = swab32(tmp[4]);
(*key)[2] = swab32(tmp[3]);
(*key)[3] = swab32(tmp[2]);
(*key)[4] = swab32(tmp[1]);
(*key)[5] = swab32(tmp[0]);
} else if (key_len == AQ_MACSEC_KEY_LEN_256_BIT) {
(*key)[0] = swab32(tmp[7]);
(*key)[1] = swab32(tmp[6]);
(*key)[2] = swab32(tmp[5]);
(*key)[3] = swab32(tmp[4]);
(*key)[4] = swab32(tmp[3]);
(*key)[5] = swab32(tmp[2]);
(*key)[6] = swab32(tmp[1]);
(*key)[7] = swab32(tmp[0]);
} else {
pr_warn("Rotate_keys: invalid key_len\n");
}
}
#define STATS_2x32_TO_64(stat_field) \
(((u64)stat_field[1] << 32) | stat_field[0])
static int aq_get_macsec_common_stats(struct aq_hw_s *hw,
struct aq_macsec_common_stats *stats)
{
struct aq_mss_ingress_common_counters ingress_counters;
struct aq_mss_egress_common_counters egress_counters;
int ret;
/* MACSEC counters */
ret = aq_mss_get_ingress_common_counters(hw, &ingress_counters);
if (unlikely(ret))
return ret;
stats->in.ctl_pkts = STATS_2x32_TO_64(ingress_counters.ctl_pkts);
stats->in.tagged_miss_pkts =
STATS_2x32_TO_64(ingress_counters.tagged_miss_pkts);
stats->in.untagged_miss_pkts =
STATS_2x32_TO_64(ingress_counters.untagged_miss_pkts);
stats->in.notag_pkts = STATS_2x32_TO_64(ingress_counters.notag_pkts);
stats->in.untagged_pkts =
STATS_2x32_TO_64(ingress_counters.untagged_pkts);
stats->in.bad_tag_pkts =
STATS_2x32_TO_64(ingress_counters.bad_tag_pkts);
stats->in.no_sci_pkts = STATS_2x32_TO_64(ingress_counters.no_sci_pkts);
stats->in.unknown_sci_pkts =
STATS_2x32_TO_64(ingress_counters.unknown_sci_pkts);
stats->in.ctrl_prt_pass_pkts =
STATS_2x32_TO_64(ingress_counters.ctrl_prt_pass_pkts);
stats->in.unctrl_prt_pass_pkts =
STATS_2x32_TO_64(ingress_counters.unctrl_prt_pass_pkts);
stats->in.ctrl_prt_fail_pkts =
STATS_2x32_TO_64(ingress_counters.ctrl_prt_fail_pkts);
stats->in.unctrl_prt_fail_pkts =
STATS_2x32_TO_64(ingress_counters.unctrl_prt_fail_pkts);
stats->in.too_long_pkts =
STATS_2x32_TO_64(ingress_counters.too_long_pkts);
stats->in.igpoc_ctl_pkts =
STATS_2x32_TO_64(ingress_counters.igpoc_ctl_pkts);
stats->in.ecc_error_pkts =
STATS_2x32_TO_64(ingress_counters.ecc_error_pkts);
stats->in.unctrl_hit_drop_redir =
STATS_2x32_TO_64(ingress_counters.unctrl_hit_drop_redir);
ret = aq_mss_get_egress_common_counters(hw, &egress_counters);
if (unlikely(ret))
return ret;
stats->out.ctl_pkts = STATS_2x32_TO_64(egress_counters.ctl_pkt);
stats->out.unknown_sa_pkts =
STATS_2x32_TO_64(egress_counters.unknown_sa_pkts);
stats->out.untagged_pkts =
STATS_2x32_TO_64(egress_counters.untagged_pkts);
stats->out.too_long = STATS_2x32_TO_64(egress_counters.too_long);
stats->out.ecc_error_pkts =
STATS_2x32_TO_64(egress_counters.ecc_error_pkts);
stats->out.unctrl_hit_drop_redir =
STATS_2x32_TO_64(egress_counters.unctrl_hit_drop_redir);
return 0;
}
static int aq_get_rxsa_stats(struct aq_hw_s *hw, const int sa_idx,
struct aq_macsec_rx_sa_stats *stats)
{
struct aq_mss_ingress_sa_counters i_sa_counters;
int ret;
ret = aq_mss_get_ingress_sa_counters(hw, &i_sa_counters, sa_idx);
if (unlikely(ret))
return ret;
stats->untagged_hit_pkts =
STATS_2x32_TO_64(i_sa_counters.untagged_hit_pkts);
stats->ctrl_hit_drop_redir_pkts =
STATS_2x32_TO_64(i_sa_counters.ctrl_hit_drop_redir_pkts);
stats->not_using_sa = STATS_2x32_TO_64(i_sa_counters.not_using_sa);
stats->unused_sa = STATS_2x32_TO_64(i_sa_counters.unused_sa);
stats->not_valid_pkts = STATS_2x32_TO_64(i_sa_counters.not_valid_pkts);
stats->invalid_pkts = STATS_2x32_TO_64(i_sa_counters.invalid_pkts);
stats->ok_pkts = STATS_2x32_TO_64(i_sa_counters.ok_pkts);
stats->late_pkts = STATS_2x32_TO_64(i_sa_counters.late_pkts);
stats->delayed_pkts = STATS_2x32_TO_64(i_sa_counters.delayed_pkts);
stats->unchecked_pkts = STATS_2x32_TO_64(i_sa_counters.unchecked_pkts);
stats->validated_octets =
STATS_2x32_TO_64(i_sa_counters.validated_octets);
stats->decrypted_octets =
STATS_2x32_TO_64(i_sa_counters.decrypted_octets);
return 0;
}
static int aq_get_txsa_stats(struct aq_hw_s *hw, const int sa_idx,
struct aq_macsec_tx_sa_stats *stats)
{
struct aq_mss_egress_sa_counters e_sa_counters;
int ret;
ret = aq_mss_get_egress_sa_counters(hw, &e_sa_counters, sa_idx);
if (unlikely(ret))
return ret;
stats->sa_hit_drop_redirect =
STATS_2x32_TO_64(e_sa_counters.sa_hit_drop_redirect);
stats->sa_protected2_pkts =
STATS_2x32_TO_64(e_sa_counters.sa_protected2_pkts);
stats->sa_protected_pkts =
STATS_2x32_TO_64(e_sa_counters.sa_protected_pkts);
stats->sa_encrypted_pkts =
STATS_2x32_TO_64(e_sa_counters.sa_encrypted_pkts);
return 0;
}
static int aq_get_txsa_next_pn(struct aq_hw_s *hw, const int sa_idx, u32 *pn)
{
struct aq_mss_egress_sa_record sa_rec;
int ret;
ret = aq_mss_get_egress_sa_record(hw, &sa_rec, sa_idx);
if (likely(!ret))
*pn = sa_rec.next_pn;
return ret;
}
static int aq_get_rxsa_next_pn(struct aq_hw_s *hw, const int sa_idx, u32 *pn)
{
struct aq_mss_ingress_sa_record sa_rec;
int ret;
ret = aq_mss_get_ingress_sa_record(hw, &sa_rec, sa_idx);
if (likely(!ret))
*pn = (!sa_rec.sat_nextpn) ? sa_rec.next_pn : 0;
return ret;
}
static int aq_get_txsc_stats(struct aq_hw_s *hw, const int sc_idx,
struct aq_macsec_tx_sc_stats *stats)
{
struct aq_mss_egress_sc_counters e_sc_counters;
int ret;
ret = aq_mss_get_egress_sc_counters(hw, &e_sc_counters, sc_idx);
if (unlikely(ret))
return ret;
stats->sc_protected_pkts =
STATS_2x32_TO_64(e_sc_counters.sc_protected_pkts);
stats->sc_encrypted_pkts =
STATS_2x32_TO_64(e_sc_counters.sc_encrypted_pkts);
stats->sc_protected_octets =
STATS_2x32_TO_64(e_sc_counters.sc_protected_octets);
stats->sc_encrypted_octets =
STATS_2x32_TO_64(e_sc_counters.sc_encrypted_octets);
return 0;
}
static int aq_mdo_dev_open(struct macsec_context *ctx)
{
struct aq_nic_s *nic = netdev_priv(ctx->netdev);
int ret = 0;
if (ctx->prepare)
return 0;
if (netif_carrier_ok(nic->ndev))
ret = aq_apply_secy_cfg(nic, ctx->secy);
return ret;
}
static int aq_mdo_dev_stop(struct macsec_context *ctx)
{
struct aq_nic_s *nic = netdev_priv(ctx->netdev);
int i;
if (ctx->prepare)
return 0;
for (i = 0; i < AQ_MACSEC_MAX_SC; i++) {
if (nic->macsec_cfg->txsc_idx_busy & BIT(i))
aq_clear_secy(nic, nic->macsec_cfg->aq_txsc[i].sw_secy,
AQ_CLEAR_HW);
}
return 0;
}
static int aq_set_txsc(struct aq_nic_s *nic, const int txsc_idx)
{
struct aq_macsec_txsc *aq_txsc = &nic->macsec_cfg->aq_txsc[txsc_idx];
struct aq_mss_egress_class_record tx_class_rec = { 0 };
const struct macsec_secy *secy = aq_txsc->sw_secy;
struct aq_mss_egress_sc_record sc_rec = { 0 };
unsigned int sc_idx = aq_txsc->hw_sc_idx;
struct aq_hw_s *hw = nic->aq_hw;
int ret = 0;
aq_ether_addr_to_mac(tx_class_rec.mac_sa, secy->netdev->dev_addr);
put_unaligned_be64((__force u64)secy->sci, tx_class_rec.sci);
tx_class_rec.sci_mask = 0;
tx_class_rec.sa_mask = 0x3f;
tx_class_rec.action = 0; /* forward to SA/SC table */
tx_class_rec.valid = 1;
tx_class_rec.sc_idx = sc_idx;
tx_class_rec.sc_sa = nic->macsec_cfg->sc_sa;
ret = aq_mss_set_egress_class_record(hw, &tx_class_rec, txsc_idx);
if (ret)
return ret;
sc_rec.protect = secy->protect_frames;
if (secy->tx_sc.encrypt)
sc_rec.tci |= BIT(1);
if (secy->tx_sc.scb)
sc_rec.tci |= BIT(2);
if (secy->tx_sc.send_sci)
sc_rec.tci |= BIT(3);
if (secy->tx_sc.end_station)
sc_rec.tci |= BIT(4);
/* The C bit is clear if and only if the Secure Data is
* exactly the same as the User Data and the ICV is 16 octets long.
*/
if (!(secy->icv_len == 16 && !secy->tx_sc.encrypt))
sc_rec.tci |= BIT(0);
sc_rec.an_roll = 0;
switch (secy->key_len) {
case AQ_MACSEC_KEY_LEN_128_BIT:
sc_rec.sak_len = 0;
break;
case AQ_MACSEC_KEY_LEN_192_BIT:
sc_rec.sak_len = 1;
break;
case AQ_MACSEC_KEY_LEN_256_BIT:
sc_rec.sak_len = 2;
break;
default:
WARN_ONCE(true, "Invalid sc_sa");
return -EINVAL;
}
sc_rec.curr_an = secy->tx_sc.encoding_sa;
sc_rec.valid = 1;
sc_rec.fresh = 1;
return aq_mss_set_egress_sc_record(hw, &sc_rec, sc_idx);
}
static u32 aq_sc_idx_max(const enum aq_macsec_sc_sa sc_sa)
{
u32 result = 0;
switch (sc_sa) {
case aq_macsec_sa_sc_4sa_8sc:
result = 8;
break;
case aq_macsec_sa_sc_2sa_16sc:
result = 16;
break;
case aq_macsec_sa_sc_1sa_32sc:
result = 32;
break;
default:
break;
}
return result;
}
static u32 aq_to_hw_sc_idx(const u32 sc_idx, const enum aq_macsec_sc_sa sc_sa)
{
switch (sc_sa) {
case aq_macsec_sa_sc_4sa_8sc:
return sc_idx << 2;
case aq_macsec_sa_sc_2sa_16sc:
return sc_idx << 1;
case aq_macsec_sa_sc_1sa_32sc:
return sc_idx;
default:
WARN_ONCE(true, "Invalid sc_sa");
}
return sc_idx;
}
static enum aq_macsec_sc_sa sc_sa_from_num_an(const int num_an)
{
enum aq_macsec_sc_sa sc_sa = aq_macsec_sa_sc_not_used;
switch (num_an) {
case 4:
sc_sa = aq_macsec_sa_sc_4sa_8sc;
break;
case 2:
sc_sa = aq_macsec_sa_sc_2sa_16sc;
break;
case 1:
sc_sa = aq_macsec_sa_sc_1sa_32sc;
break;
default:
break;
}
return sc_sa;
}
static int aq_mdo_add_secy(struct macsec_context *ctx)
{
struct aq_nic_s *nic = netdev_priv(ctx->netdev);
struct aq_macsec_cfg *cfg = nic->macsec_cfg;
const struct macsec_secy *secy = ctx->secy;
enum aq_macsec_sc_sa sc_sa;
u32 txsc_idx;
int ret = 0;
#if LINUX_VERSION_CODE >= KERNEL_VERSION(5, 7, 0)
if (secy->xpn)
return -EOPNOTSUPP;
#endif
sc_sa = sc_sa_from_num_an(MACSEC_NUM_AN);
if (sc_sa == aq_macsec_sa_sc_not_used)
return -EINVAL;
if (hweight32(cfg->txsc_idx_busy) >= aq_sc_idx_max(sc_sa))
return -ENOSPC;
txsc_idx = ffz(cfg->txsc_idx_busy);
if (txsc_idx == AQ_MACSEC_MAX_SC)
return -ENOSPC;
if (ctx->prepare)
return 0;
cfg->sc_sa = sc_sa;
cfg->aq_txsc[txsc_idx].hw_sc_idx = aq_to_hw_sc_idx(txsc_idx, sc_sa);
cfg->aq_txsc[txsc_idx].sw_secy = secy;
if (netif_carrier_ok(nic->ndev) && netif_running(secy->netdev))
ret = aq_set_txsc(nic, txsc_idx);
set_bit(txsc_idx, &cfg->txsc_idx_busy);
return ret;
}
static int aq_mdo_upd_secy(struct macsec_context *ctx)
{
struct aq_nic_s *nic = netdev_priv(ctx->netdev);
const struct macsec_secy *secy = ctx->secy;
int txsc_idx;
int ret = 0;
txsc_idx = aq_get_txsc_idx_from_secy(nic->macsec_cfg, secy);
if (txsc_idx < 0)
return -ENOENT;
if (ctx->prepare)
return 0;
if (netif_carrier_ok(nic->ndev) && netif_running(secy->netdev))
ret = aq_set_txsc(nic, txsc_idx);
return ret;
}
static int aq_clear_txsc(struct aq_nic_s *nic, const int txsc_idx,
enum aq_clear_type clear_type)
{
struct aq_macsec_txsc *tx_sc = &nic->macsec_cfg->aq_txsc[txsc_idx];
struct aq_mss_egress_class_record tx_class_rec = { 0 };
struct aq_mss_egress_sc_record sc_rec = { 0 };
struct aq_hw_s *hw = nic->aq_hw;
int ret = 0;
int sa_num;
for_each_set_bit (sa_num, &tx_sc->tx_sa_idx_busy, AQ_MACSEC_MAX_SA) {
ret = aq_clear_txsa(nic, tx_sc, sa_num, clear_type);
if (ret)
return ret;
}
if (clear_type & AQ_CLEAR_HW) {
ret = aq_mss_set_egress_class_record(hw, &tx_class_rec,
txsc_idx);
if (ret)
return ret;
sc_rec.fresh = 1;
ret = aq_mss_set_egress_sc_record(hw, &sc_rec,
tx_sc->hw_sc_idx);
if (ret)
return ret;
}
if (clear_type & AQ_CLEAR_SW) {
clear_bit(txsc_idx, &nic->macsec_cfg->txsc_idx_busy);
nic->macsec_cfg->aq_txsc[txsc_idx].sw_secy = NULL;
}
return ret;
}
static int aq_mdo_del_secy(struct macsec_context *ctx)
{
struct aq_nic_s *nic = netdev_priv(ctx->netdev);
int ret = 0;
if (ctx->prepare)
return 0;
if (!nic->macsec_cfg)
return 0;
ret = aq_clear_secy(nic, ctx->secy, AQ_CLEAR_ALL);
return ret;
}
static int aq_update_txsa(struct aq_nic_s *nic, const unsigned int sc_idx,
const struct macsec_secy *secy,
const struct macsec_tx_sa *tx_sa,
const unsigned char *key, const unsigned char an)
{
#if LINUX_VERSION_CODE < KERNEL_VERSION(5, 7, 0)
const u32 next_pn = tx_sa->next_pn;
#else
const u32 next_pn = tx_sa->next_pn_halves.lower;
#endif
struct aq_mss_egress_sakey_record key_rec;
const unsigned int sa_idx = sc_idx | an;
struct aq_mss_egress_sa_record sa_rec;
struct aq_hw_s *hw = nic->aq_hw;
int ret = 0;
memset(&sa_rec, 0, sizeof(sa_rec));
sa_rec.valid = tx_sa->active;
sa_rec.fresh = 1;
sa_rec.next_pn = next_pn;
ret = aq_mss_set_egress_sa_record(hw, &sa_rec, sa_idx);
if (ret)
return ret;
if (!key)
return ret;
memset(&key_rec, 0, sizeof(key_rec));
memcpy(&key_rec.key, key, secy->key_len);
aq_rotate_keys(&key_rec.key, secy->key_len);
ret = aq_mss_set_egress_sakey_record(hw, &key_rec, sa_idx);
return ret;
}
static int aq_mdo_add_txsa(struct macsec_context *ctx)
{
struct aq_nic_s *nic = netdev_priv(ctx->netdev);
struct aq_macsec_cfg *cfg = nic->macsec_cfg;
const struct macsec_secy *secy = ctx->secy;
struct aq_macsec_txsc *aq_txsc;
int txsc_idx;
int ret = 0;
txsc_idx = aq_get_txsc_idx_from_secy(cfg, secy);
if (txsc_idx < 0)
return -EINVAL;
if (ctx->prepare)
return 0;
aq_txsc = &cfg->aq_txsc[txsc_idx];
set_bit(ctx->sa.assoc_num, &aq_txsc->tx_sa_idx_busy);
memcpy(aq_txsc->tx_sa_key[ctx->sa.assoc_num], ctx->sa.key,
secy->key_len);
if (netif_carrier_ok(nic->ndev) && netif_running(secy->netdev))
ret = aq_update_txsa(nic, aq_txsc->hw_sc_idx, secy,
ctx->sa.tx_sa, ctx->sa.key,
ctx->sa.assoc_num);
return ret;
}
static int aq_mdo_upd_txsa(struct macsec_context *ctx)
{
struct aq_nic_s *nic = netdev_priv(ctx->netdev);
struct aq_macsec_cfg *cfg = nic->macsec_cfg;
const struct macsec_secy *secy = ctx->secy;
struct aq_macsec_txsc *aq_txsc;
int txsc_idx;
int ret = 0;
txsc_idx = aq_get_txsc_idx_from_secy(cfg, secy);
if (txsc_idx < 0)
return -EINVAL;
if (ctx->prepare)
return 0;
aq_txsc = &cfg->aq_txsc[txsc_idx];
if (netif_carrier_ok(nic->ndev) && netif_running(secy->netdev))
ret = aq_update_txsa(nic, aq_txsc->hw_sc_idx, secy,
ctx->sa.tx_sa, NULL, ctx->sa.assoc_num);
return ret;
}
static int aq_clear_txsa(struct aq_nic_s *nic, struct aq_macsec_txsc *aq_txsc,
const int sa_num, enum aq_clear_type clear_type)
{
const int sa_idx = aq_txsc->hw_sc_idx | sa_num;
struct aq_hw_s *hw = nic->aq_hw;
int ret = 0;
if (clear_type & AQ_CLEAR_SW)
clear_bit(sa_num, &aq_txsc->tx_sa_idx_busy);
if ((clear_type & AQ_CLEAR_HW) && netif_carrier_ok(nic->ndev)) {
struct aq_mss_egress_sakey_record key_rec;
struct aq_mss_egress_sa_record sa_rec;
memset(&sa_rec, 0, sizeof(sa_rec));
sa_rec.fresh = 1;
ret = aq_mss_set_egress_sa_record(hw, &sa_rec, sa_idx);
if (ret)
return ret;
memset(&key_rec, 0, sizeof(key_rec));
return aq_mss_set_egress_sakey_record(hw, &key_rec, sa_idx);
}
return 0;
}
static int aq_mdo_del_txsa(struct macsec_context *ctx)
{
struct aq_nic_s *nic = netdev_priv(ctx->netdev);
struct aq_macsec_cfg *cfg = nic->macsec_cfg;
int txsc_idx;
int ret = 0;
txsc_idx = aq_get_txsc_idx_from_secy(cfg, ctx->secy);
if (txsc_idx < 0)
return -EINVAL;
if (ctx->prepare)
return 0;
ret = aq_clear_txsa(nic, &cfg->aq_txsc[txsc_idx], ctx->sa.assoc_num,
AQ_CLEAR_ALL);
return ret;
}
static int aq_rxsc_validate_frames(const enum macsec_validation_type validate)
{
switch (validate) {
case MACSEC_VALIDATE_DISABLED:
return 2;
case MACSEC_VALIDATE_CHECK:
return 1;
case MACSEC_VALIDATE_STRICT:
return 0;
default:
WARN_ONCE(true, "Invalid validation type");
}
return 0;
}
static int aq_set_rxsc(struct aq_nic_s *nic, const u32 rxsc_idx)
{
const struct aq_macsec_rxsc *aq_rxsc =
&nic->macsec_cfg->aq_rxsc[rxsc_idx];
struct aq_mss_ingress_preclass_record pre_class_record;
const struct macsec_rx_sc *rx_sc = aq_rxsc->sw_rxsc;
const struct macsec_secy *secy = aq_rxsc->sw_secy;
const u32 hw_sc_idx = aq_rxsc->hw_sc_idx;
struct aq_mss_ingress_sc_record sc_record;
struct aq_hw_s *hw = nic->aq_hw;
int ret = 0;
memset(&pre_class_record, 0, sizeof(pre_class_record));
put_unaligned_be64((__force u64)rx_sc->sci, pre_class_record.sci);
pre_class_record.sci_mask = 0xff;
/* match all MACSEC ethertype packets */
pre_class_record.eth_type = ETH_P_MACSEC;
pre_class_record.eth_type_mask = 0x3;
aq_ether_addr_to_mac(pre_class_record.mac_sa, (char *)&rx_sc->sci);
pre_class_record.sa_mask = 0x3f;
pre_class_record.an_mask = nic->macsec_cfg->sc_sa;
pre_class_record.sc_idx = hw_sc_idx;
/* strip SecTAG & forward for decryption */
pre_class_record.action = 0x0;
pre_class_record.valid = 1;
ret = aq_mss_set_ingress_preclass_record(hw, &pre_class_record,
2 * rxsc_idx + 1);
if (ret)
return ret;
/* If SCI is absent, then match by SA alone */
pre_class_record.sci_mask = 0;
pre_class_record.sci_from_table = 1;
ret = aq_mss_set_ingress_preclass_record(hw, &pre_class_record,
2 * rxsc_idx);
if (ret)
return ret;
memset(&sc_record, 0, sizeof(sc_record));
sc_record.validate_frames =
aq_rxsc_validate_frames(secy->validate_frames);
if (secy->replay_protect) {
sc_record.replay_protect = 1;
sc_record.anti_replay_window = secy->replay_window;
}
sc_record.valid = 1;
sc_record.fresh = 1;
ret = aq_mss_set_ingress_sc_record(hw, &sc_record, hw_sc_idx);
if (ret)
return ret;
return ret;
}
static int aq_mdo_add_rxsc(struct macsec_context *ctx)
{
struct aq_nic_s *nic = netdev_priv(ctx->netdev);
struct aq_macsec_cfg *cfg = nic->macsec_cfg;
const u32 rxsc_idx_max = aq_sc_idx_max(cfg->sc_sa);
u32 rxsc_idx;
int ret = 0;
if (hweight32(cfg->rxsc_idx_busy) >= rxsc_idx_max)
return -ENOSPC;
rxsc_idx = ffz(cfg->rxsc_idx_busy);
if (rxsc_idx >= rxsc_idx_max)
return -ENOSPC;
if (ctx->prepare)
return 0;
cfg->aq_rxsc[rxsc_idx].hw_sc_idx = aq_to_hw_sc_idx(rxsc_idx,
cfg->sc_sa);
cfg->aq_rxsc[rxsc_idx].sw_secy = ctx->secy;
cfg->aq_rxsc[rxsc_idx].sw_rxsc = ctx->rx_sc;
if (netif_carrier_ok(nic->ndev) && netif_running(ctx->secy->netdev))
ret = aq_set_rxsc(nic, rxsc_idx);
if (ret < 0)
return ret;
set_bit(rxsc_idx, &cfg->rxsc_idx_busy);
return 0;
}
static int aq_mdo_upd_rxsc(struct macsec_context *ctx)
{
struct aq_nic_s *nic = netdev_priv(ctx->netdev);
int rxsc_idx;
int ret = 0;
rxsc_idx = aq_get_rxsc_idx_from_rxsc(nic->macsec_cfg, ctx->rx_sc);
if (rxsc_idx < 0)
return -ENOENT;
if (ctx->prepare)
return 0;
if (netif_carrier_ok(nic->ndev) && netif_running(ctx->secy->netdev))
ret = aq_set_rxsc(nic, rxsc_idx);
return ret;
}
static int aq_clear_rxsc(struct aq_nic_s *nic, const int rxsc_idx,
enum aq_clear_type clear_type)
{
struct aq_macsec_rxsc *rx_sc = &nic->macsec_cfg->aq_rxsc[rxsc_idx];
struct aq_hw_s *hw = nic->aq_hw;
int ret = 0;
int sa_num;
for_each_set_bit (sa_num, &rx_sc->rx_sa_idx_busy, AQ_MACSEC_MAX_SA) {
ret = aq_clear_rxsa(nic, rx_sc, sa_num, clear_type);
if (ret)
return ret;
}
if (clear_type & AQ_CLEAR_HW) {
struct aq_mss_ingress_preclass_record pre_class_record;
struct aq_mss_ingress_sc_record sc_record;
memset(&pre_class_record, 0, sizeof(pre_class_record));
memset(&sc_record, 0, sizeof(sc_record));
ret = aq_mss_set_ingress_preclass_record(hw, &pre_class_record,
2 * rxsc_idx);
if (ret)
return ret;
ret = aq_mss_set_ingress_preclass_record(hw, &pre_class_record,
2 * rxsc_idx + 1);
if (ret)
return ret;
sc_record.fresh = 1;
ret = aq_mss_set_ingress_sc_record(hw, &sc_record,
rx_sc->hw_sc_idx);
if (ret)
return ret;
}
if (clear_type & AQ_CLEAR_SW) {
clear_bit(rxsc_idx, &nic->macsec_cfg->rxsc_idx_busy);
rx_sc->sw_secy = NULL;
rx_sc->sw_rxsc = NULL;
}
return ret;
}
static int aq_mdo_del_rxsc(struct macsec_context *ctx)
{
struct aq_nic_s *nic = netdev_priv(ctx->netdev);
enum aq_clear_type clear_type = AQ_CLEAR_SW;
int rxsc_idx;
int ret = 0;
rxsc_idx = aq_get_rxsc_idx_from_rxsc(nic->macsec_cfg, ctx->rx_sc);
if (rxsc_idx < 0)
return -ENOENT;
if (ctx->prepare)
return 0;
if (netif_carrier_ok(nic->ndev))
clear_type = AQ_CLEAR_ALL;
ret = aq_clear_rxsc(nic, rxsc_idx, clear_type);
return ret;
}
static int aq_update_rxsa(struct aq_nic_s *nic, const unsigned int sc_idx,
const struct macsec_secy *secy,
const struct macsec_rx_sa *rx_sa,
const unsigned char *key, const unsigned char an)
{
struct aq_mss_ingress_sakey_record sa_key_record;
#if LINUX_VERSION_CODE < KERNEL_VERSION(5, 7, 0)
const u32 next_pn = rx_sa->next_pn;
#else
const u32 next_pn = rx_sa->next_pn_halves.lower;
#endif
struct aq_mss_ingress_sa_record sa_record;
struct aq_hw_s *hw = nic->aq_hw;
const int sa_idx = sc_idx | an;
int ret = 0;
memset(&sa_record, 0, sizeof(sa_record));
sa_record.valid = rx_sa->active;
sa_record.fresh = 1;
sa_record.next_pn = next_pn;
ret = aq_mss_set_ingress_sa_record(hw, &sa_record, sa_idx);
if (ret)
return ret;
if (!key)
return ret;
memset(&sa_key_record, 0, sizeof(sa_key_record));
memcpy(&sa_key_record.key, key, secy->key_len);
switch (secy->key_len) {
case AQ_MACSEC_KEY_LEN_128_BIT:
sa_key_record.key_len = 0;
break;
case AQ_MACSEC_KEY_LEN_192_BIT:
sa_key_record.key_len = 1;
break;
case AQ_MACSEC_KEY_LEN_256_BIT:
sa_key_record.key_len = 2;
break;
default:
return -1;
}
aq_rotate_keys(&sa_key_record.key, secy->key_len);
ret = aq_mss_set_ingress_sakey_record(hw, &sa_key_record, sa_idx);
return ret;
}
static int aq_mdo_add_rxsa(struct macsec_context *ctx)
{
const struct macsec_rx_sc *rx_sc = ctx->sa.rx_sa->sc;
struct aq_nic_s *nic = netdev_priv(ctx->netdev);
const struct macsec_secy *secy = ctx->secy;
struct aq_macsec_rxsc *aq_rxsc;
int rxsc_idx;
int ret = 0;
rxsc_idx = aq_get_rxsc_idx_from_rxsc(nic->macsec_cfg, rx_sc);
if (rxsc_idx < 0)
return -EINVAL;
if (ctx->prepare)
return 0;
aq_rxsc = &nic->macsec_cfg->aq_rxsc[rxsc_idx];
set_bit(ctx->sa.assoc_num, &aq_rxsc->rx_sa_idx_busy);
memcpy(aq_rxsc->rx_sa_key[ctx->sa.assoc_num], ctx->sa.key,
secy->key_len);
if (netif_carrier_ok(nic->ndev) && netif_running(secy->netdev))
ret = aq_update_rxsa(nic, aq_rxsc->hw_sc_idx, secy,
ctx->sa.rx_sa, ctx->sa.key,
ctx->sa.assoc_num);
return ret;
}
static int aq_mdo_upd_rxsa(struct macsec_context *ctx)
{
const struct macsec_rx_sc *rx_sc = ctx->sa.rx_sa->sc;
struct aq_nic_s *nic = netdev_priv(ctx->netdev);
struct aq_macsec_cfg *cfg = nic->macsec_cfg;
const struct macsec_secy *secy = ctx->secy;
int rxsc_idx;
int ret = 0;
rxsc_idx = aq_get_rxsc_idx_from_rxsc(cfg, rx_sc);
if (rxsc_idx < 0)
return -EINVAL;
if (ctx->prepare)
return 0;
if (netif_carrier_ok(nic->ndev) && netif_running(secy->netdev))
ret = aq_update_rxsa(nic, cfg->aq_rxsc[rxsc_idx].hw_sc_idx,
secy, ctx->sa.rx_sa, NULL,
ctx->sa.assoc_num);
return ret;