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net: microchip: sparx5: Add support for TC flower ARP dissector

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This add support for Sparx5 for dissecting TC ARP flower filter keys and
sets up the Sparx5 IS2 VCAP to generate the ARP keyset for ARP frames.

Signed-off-by: Steen Hegelund <steen.hegelund@microchip.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
This commit is contained in:
Steen Hegelund 2022-11-11 14:05:15 +01:00 committed by David S. Miller
parent 70ea86a0df
commit 3a344f99bb
2 changed files with 77 additions and 1 deletions
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76
drivers/net/ethernet/microchip/sparx5/sparx5_tc_flower.c
View File

@ -26,10 +26,24 @@ struct sparx5_tc_flower_parse_usage {
*/
static u16 sparx5_tc_known_etypes[] = {
ETH_P_ALL,
ETH_P_ARP,
ETH_P_IP,
ETH_P_IPV6,
};
enum sparx5_is2_arp_opcode {
SPX5_IS2_ARP_REQUEST,
SPX5_IS2_ARP_REPLY,
SPX5_IS2_RARP_REQUEST,
SPX5_IS2_RARP_REPLY,
};
enum tc_arp_opcode {
TC_ARP_OP_RESERVED,
TC_ARP_OP_REQUEST,
TC_ARP_OP_REPLY,
};
static bool sparx5_tc_is_known_etype(u16 etype)
{
int idx;
@ -404,6 +418,67 @@ out:
return err;
}
static int
sparx5_tc_flower_handler_arp_usage(struct sparx5_tc_flower_parse_usage *st)
{
struct flow_match_arp mt;
u16 value, mask;
u32 ipval, ipmsk;
int err;
flow_rule_match_arp(st->frule, &mt);
if (mt.mask->op) {
mask = 0x3;
if (st->l3_proto == ETH_P_ARP) {
value = mt.key->op == TC_ARP_OP_REQUEST ?
SPX5_IS2_ARP_REQUEST :
SPX5_IS2_ARP_REPLY;
} else { /* RARP */
value = mt.key->op == TC_ARP_OP_REQUEST ?
SPX5_IS2_RARP_REQUEST :
SPX5_IS2_RARP_REPLY;
}
err = vcap_rule_add_key_u32(st->vrule, VCAP_KF_ARP_OPCODE,
value, mask);
if (err)
goto out;
}
/* The IS2 ARP keyset does not support ARP hardware addresses */
if (!is_zero_ether_addr(mt.mask->sha) ||
!is_zero_ether_addr(mt.mask->tha))
goto out;
if (mt.mask->sip) {
ipval = be32_to_cpu((__force __be32)mt.key->sip);
ipmsk = be32_to_cpu((__force __be32)mt.mask->sip);
err = vcap_rule_add_key_u32(st->vrule, VCAP_KF_L3_IP4_SIP,
ipval, ipmsk);
if (err)
goto out;
}
if (mt.mask->tip) {
ipval = be32_to_cpu((__force __be32)mt.key->tip);
ipmsk = be32_to_cpu((__force __be32)mt.mask->tip);
err = vcap_rule_add_key_u32(st->vrule, VCAP_KF_L3_IP4_DIP,
ipval, ipmsk);
if (err)
goto out;
}
st->used_keys |= BIT(FLOW_DISSECTOR_KEY_ARP);
return err;
out:
NL_SET_ERR_MSG_MOD(st->fco->common.extack, "arp parse error");
return err;
}
static int
sparx5_tc_flower_handler_ip_usage(struct sparx5_tc_flower_parse_usage *st)
{
@ -438,6 +513,7 @@ static int (*sparx5_tc_flower_usage_handlers[])(struct sparx5_tc_flower_parse_us
[FLOW_DISSECTOR_KEY_BASIC] = sparx5_tc_flower_handler_basic_usage,
[FLOW_DISSECTOR_KEY_VLAN] = sparx5_tc_flower_handler_vlan_usage,
[FLOW_DISSECTOR_KEY_TCP] = sparx5_tc_flower_handler_tcp_usage,
[FLOW_DISSECTOR_KEY_ARP] = sparx5_tc_flower_handler_arp_usage,
[FLOW_DISSECTOR_KEY_IP] = sparx5_tc_flower_handler_ip_usage,
};

2
drivers/net/ethernet/microchip/sparx5/sparx5_vcap_impl.c
View File

@ -540,7 +540,7 @@ static void sparx5_vcap_port_key_selection(struct sparx5 *sparx5,
VCAP_IS2_PS_IPV4_UC_IP4_TCP_UDP_OTHER,
VCAP_IS2_PS_IPV6_MC_IP_7TUPLE,
VCAP_IS2_PS_IPV6_UC_IP_7TUPLE,
VCAP_IS2_PS_ARP_MAC_ETYPE);
VCAP_IS2_PS_ARP_ARP);
for (lookup = 0; lookup < admin->lookups; ++lookup) {
for (portno = 0; portno < SPX5_PORTS; ++portno) {
spx5_wr(keysel, sparx5,