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path: root/drivers/net/ethernet/microchip/vcap/vcap_tc.c
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Diffstat (limited to 'drivers/net/ethernet/microchip/vcap/vcap_tc.c')
-rw-r--r--drivers/net/ethernet/microchip/vcap/vcap_tc.c412
1 files changed, 412 insertions, 0 deletions
diff --git a/drivers/net/ethernet/microchip/vcap/vcap_tc.c b/drivers/net/ethernet/microchip/vcap/vcap_tc.c
new file mode 100644
index 000000000000..09abe7944af6
--- /dev/null
+++ b/drivers/net/ethernet/microchip/vcap/vcap_tc.c
@@ -0,0 +1,412 @@
+// SPDX-License-Identifier: GPL-2.0+
+/* Microchip VCAP TC
+ *
+ * Copyright (c) 2023 Microchip Technology Inc. and its subsidiaries.
+ */
+
+#include <net/flow_offload.h>
+#include <net/ipv6.h>
+#include <net/tcp.h>
+
+#include "vcap_api_client.h"
+#include "vcap_tc.h"
+
+enum vcap_is2_arp_opcode {
+ VCAP_IS2_ARP_REQUEST,
+ VCAP_IS2_ARP_REPLY,
+ VCAP_IS2_RARP_REQUEST,
+ VCAP_IS2_RARP_REPLY,
+};
+
+enum vcap_arp_opcode {
+ VCAP_ARP_OP_RESERVED,
+ VCAP_ARP_OP_REQUEST,
+ VCAP_ARP_OP_REPLY,
+};
+
+int vcap_tc_flower_handler_ethaddr_usage(struct vcap_tc_flower_parse_usage *st)
+{
+ enum vcap_key_field smac_key = VCAP_KF_L2_SMAC;
+ enum vcap_key_field dmac_key = VCAP_KF_L2_DMAC;
+ struct flow_match_eth_addrs match;
+ struct vcap_u48_key smac, dmac;
+ int err = 0;
+
+ flow_rule_match_eth_addrs(st->frule, &match);
+
+ if (!is_zero_ether_addr(match.mask->src)) {
+ vcap_netbytes_copy(smac.value, match.key->src, ETH_ALEN);
+ vcap_netbytes_copy(smac.mask, match.mask->src, ETH_ALEN);
+ err = vcap_rule_add_key_u48(st->vrule, smac_key, &smac);
+ if (err)
+ goto out;
+ }
+
+ if (!is_zero_ether_addr(match.mask->dst)) {
+ vcap_netbytes_copy(dmac.value, match.key->dst, ETH_ALEN);
+ vcap_netbytes_copy(dmac.mask, match.mask->dst, ETH_ALEN);
+ err = vcap_rule_add_key_u48(st->vrule, dmac_key, &dmac);
+ if (err)
+ goto out;
+ }
+
+ st->used_keys |= BIT(FLOW_DISSECTOR_KEY_ETH_ADDRS);
+
+ return err;
+
+out:
+ NL_SET_ERR_MSG_MOD(st->fco->common.extack, "eth_addr parse error");
+ return err;
+}
+EXPORT_SYMBOL_GPL(vcap_tc_flower_handler_ethaddr_usage);
+
+int vcap_tc_flower_handler_ipv4_usage(struct vcap_tc_flower_parse_usage *st)
+{
+ int err = 0;
+
+ if (st->l3_proto == ETH_P_IP) {
+ struct flow_match_ipv4_addrs mt;
+
+ flow_rule_match_ipv4_addrs(st->frule, &mt);
+ if (mt.mask->src) {
+ err = vcap_rule_add_key_u32(st->vrule,
+ VCAP_KF_L3_IP4_SIP,
+ be32_to_cpu(mt.key->src),
+ be32_to_cpu(mt.mask->src));
+ if (err)
+ goto out;
+ }
+ if (mt.mask->dst) {
+ err = vcap_rule_add_key_u32(st->vrule,
+ VCAP_KF_L3_IP4_DIP,
+ be32_to_cpu(mt.key->dst),
+ be32_to_cpu(mt.mask->dst));
+ if (err)
+ goto out;
+ }
+ }
+
+ st->used_keys |= BIT(FLOW_DISSECTOR_KEY_IPV4_ADDRS);
+
+ return err;
+
+out:
+ NL_SET_ERR_MSG_MOD(st->fco->common.extack, "ipv4_addr parse error");
+ return err;
+}
+EXPORT_SYMBOL_GPL(vcap_tc_flower_handler_ipv4_usage);
+
+int vcap_tc_flower_handler_ipv6_usage(struct vcap_tc_flower_parse_usage *st)
+{
+ int err = 0;
+
+ if (st->l3_proto == ETH_P_IPV6) {
+ struct flow_match_ipv6_addrs mt;
+ struct vcap_u128_key sip;
+ struct vcap_u128_key dip;
+
+ flow_rule_match_ipv6_addrs(st->frule, &mt);
+ /* Check if address masks are non-zero */
+ if (!ipv6_addr_any(&mt.mask->src)) {
+ vcap_netbytes_copy(sip.value, mt.key->src.s6_addr, 16);
+ vcap_netbytes_copy(sip.mask, mt.mask->src.s6_addr, 16);
+ err = vcap_rule_add_key_u128(st->vrule,
+ VCAP_KF_L3_IP6_SIP, &sip);
+ if (err)
+ goto out;
+ }
+ if (!ipv6_addr_any(&mt.mask->dst)) {
+ vcap_netbytes_copy(dip.value, mt.key->dst.s6_addr, 16);
+ vcap_netbytes_copy(dip.mask, mt.mask->dst.s6_addr, 16);
+ err = vcap_rule_add_key_u128(st->vrule,
+ VCAP_KF_L3_IP6_DIP, &dip);
+ if (err)
+ goto out;
+ }
+ }
+ st->used_keys |= BIT(FLOW_DISSECTOR_KEY_IPV6_ADDRS);
+ return err;
+out:
+ NL_SET_ERR_MSG_MOD(st->fco->common.extack, "ipv6_addr parse error");
+ return err;
+}
+EXPORT_SYMBOL_GPL(vcap_tc_flower_handler_ipv6_usage);
+
+int vcap_tc_flower_handler_portnum_usage(struct vcap_tc_flower_parse_usage *st)
+{
+ struct flow_match_ports mt;
+ u16 value, mask;
+ int err = 0;
+
+ flow_rule_match_ports(st->frule, &mt);
+
+ if (mt.mask->src) {
+ value = be16_to_cpu(mt.key->src);
+ mask = be16_to_cpu(mt.mask->src);
+ err = vcap_rule_add_key_u32(st->vrule, VCAP_KF_L4_SPORT, value,
+ mask);
+ if (err)
+ goto out;
+ }
+
+ if (mt.mask->dst) {
+ value = be16_to_cpu(mt.key->dst);
+ mask = be16_to_cpu(mt.mask->dst);
+ err = vcap_rule_add_key_u32(st->vrule, VCAP_KF_L4_DPORT, value,
+ mask);
+ if (err)
+ goto out;
+ }
+
+ st->used_keys |= BIT(FLOW_DISSECTOR_KEY_PORTS);
+
+ return err;
+
+out:
+ NL_SET_ERR_MSG_MOD(st->fco->common.extack, "port parse error");
+ return err;
+}
+EXPORT_SYMBOL_GPL(vcap_tc_flower_handler_portnum_usage);
+
+int vcap_tc_flower_handler_cvlan_usage(struct vcap_tc_flower_parse_usage *st)
+{
+ enum vcap_key_field vid_key = VCAP_KF_8021Q_VID0;
+ enum vcap_key_field pcp_key = VCAP_KF_8021Q_PCP0;
+ struct flow_match_vlan mt;
+ u16 tpid;
+ int err;
+
+ flow_rule_match_cvlan(st->frule, &mt);
+
+ tpid = be16_to_cpu(mt.key->vlan_tpid);
+
+ if (tpid == ETH_P_8021Q) {
+ vid_key = VCAP_KF_8021Q_VID1;
+ pcp_key = VCAP_KF_8021Q_PCP1;
+ }
+
+ if (mt.mask->vlan_id) {
+ err = vcap_rule_add_key_u32(st->vrule, vid_key,
+ mt.key->vlan_id,
+ mt.mask->vlan_id);
+ if (err)
+ goto out;
+ }
+
+ if (mt.mask->vlan_priority) {
+ err = vcap_rule_add_key_u32(st->vrule, pcp_key,
+ mt.key->vlan_priority,
+ mt.mask->vlan_priority);
+ if (err)
+ goto out;
+ }
+
+ st->used_keys |= BIT(FLOW_DISSECTOR_KEY_CVLAN);
+
+ return 0;
+out:
+ NL_SET_ERR_MSG_MOD(st->fco->common.extack, "cvlan parse error");
+ return err;
+}
+EXPORT_SYMBOL_GPL(vcap_tc_flower_handler_cvlan_usage);
+
+int vcap_tc_flower_handler_vlan_usage(struct vcap_tc_flower_parse_usage *st,
+ enum vcap_key_field vid_key,
+ enum vcap_key_field pcp_key)
+{
+ struct flow_match_vlan mt;
+ int err;
+
+ flow_rule_match_vlan(st->frule, &mt);
+
+ if (mt.mask->vlan_id) {
+ err = vcap_rule_add_key_u32(st->vrule, vid_key,
+ mt.key->vlan_id,
+ mt.mask->vlan_id);
+ if (err)
+ goto out;
+ }
+
+ if (mt.mask->vlan_priority) {
+ err = vcap_rule_add_key_u32(st->vrule, pcp_key,
+ mt.key->vlan_priority,
+ mt.mask->vlan_priority);
+ if (err)
+ goto out;
+ }
+
+ if (mt.mask->vlan_tpid)
+ st->tpid = be16_to_cpu(mt.key->vlan_tpid);
+
+ st->used_keys |= BIT(FLOW_DISSECTOR_KEY_VLAN);
+
+ return 0;
+out:
+ NL_SET_ERR_MSG_MOD(st->fco->common.extack, "vlan parse error");
+ return err;
+}
+EXPORT_SYMBOL_GPL(vcap_tc_flower_handler_vlan_usage);
+
+int vcap_tc_flower_handler_tcp_usage(struct vcap_tc_flower_parse_usage *st)
+{
+ struct flow_match_tcp mt;
+ u16 tcp_flags_mask;
+ u16 tcp_flags_key;
+ enum vcap_bit val;
+ int err = 0;
+
+ flow_rule_match_tcp(st->frule, &mt);
+ tcp_flags_key = be16_to_cpu(mt.key->flags);
+ tcp_flags_mask = be16_to_cpu(mt.mask->flags);
+
+ if (tcp_flags_mask & TCPHDR_FIN) {
+ val = VCAP_BIT_0;
+ if (tcp_flags_key & TCPHDR_FIN)
+ val = VCAP_BIT_1;
+ err = vcap_rule_add_key_bit(st->vrule, VCAP_KF_L4_FIN, val);
+ if (err)
+ goto out;
+ }
+
+ if (tcp_flags_mask & TCPHDR_SYN) {
+ val = VCAP_BIT_0;
+ if (tcp_flags_key & TCPHDR_SYN)
+ val = VCAP_BIT_1;
+ err = vcap_rule_add_key_bit(st->vrule, VCAP_KF_L4_SYN, val);
+ if (err)
+ goto out;
+ }
+
+ if (tcp_flags_mask & TCPHDR_RST) {
+ val = VCAP_BIT_0;
+ if (tcp_flags_key & TCPHDR_RST)
+ val = VCAP_BIT_1;
+ err = vcap_rule_add_key_bit(st->vrule, VCAP_KF_L4_RST, val);
+ if (err)
+ goto out;
+ }
+
+ if (tcp_flags_mask & TCPHDR_PSH) {
+ val = VCAP_BIT_0;
+ if (tcp_flags_key & TCPHDR_PSH)
+ val = VCAP_BIT_1;
+ err = vcap_rule_add_key_bit(st->vrule, VCAP_KF_L4_PSH, val);
+ if (err)
+ goto out;
+ }
+
+ if (tcp_flags_mask & TCPHDR_ACK) {
+ val = VCAP_BIT_0;
+ if (tcp_flags_key & TCPHDR_ACK)
+ val = VCAP_BIT_1;
+ err = vcap_rule_add_key_bit(st->vrule, VCAP_KF_L4_ACK, val);
+ if (err)
+ goto out;
+ }
+
+ if (tcp_flags_mask & TCPHDR_URG) {
+ val = VCAP_BIT_0;
+ if (tcp_flags_key & TCPHDR_URG)
+ val = VCAP_BIT_1;
+ err = vcap_rule_add_key_bit(st->vrule, VCAP_KF_L4_URG, val);
+ if (err)
+ goto out;
+ }
+
+ st->used_keys |= BIT(FLOW_DISSECTOR_KEY_TCP);
+
+ return err;
+
+out:
+ NL_SET_ERR_MSG_MOD(st->fco->common.extack, "tcp_flags parse error");
+ return err;
+}
+EXPORT_SYMBOL_GPL(vcap_tc_flower_handler_tcp_usage);
+
+int vcap_tc_flower_handler_arp_usage(struct vcap_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 == VCAP_ARP_OP_REQUEST ?
+ VCAP_IS2_ARP_REQUEST :
+ VCAP_IS2_ARP_REPLY;
+ } else { /* RARP */
+ value = mt.key->op == VCAP_ARP_OP_REQUEST ?
+ VCAP_IS2_RARP_REQUEST :
+ VCAP_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)) {
+ err = -EINVAL;
+ 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 0;
+
+out:
+ NL_SET_ERR_MSG_MOD(st->fco->common.extack, "arp parse error");
+ return err;
+}
+EXPORT_SYMBOL_GPL(vcap_tc_flower_handler_arp_usage);
+
+int vcap_tc_flower_handler_ip_usage(struct vcap_tc_flower_parse_usage *st)
+{
+ struct flow_match_ip mt;
+ int err = 0;
+
+ flow_rule_match_ip(st->frule, &mt);
+
+ if (mt.mask->tos) {
+ err = vcap_rule_add_key_u32(st->vrule, VCAP_KF_L3_TOS,
+ mt.key->tos,
+ mt.mask->tos);
+ if (err)
+ goto out;
+ }
+
+ st->used_keys |= BIT(FLOW_DISSECTOR_KEY_IP);
+
+ return err;
+
+out:
+ NL_SET_ERR_MSG_MOD(st->fco->common.extack, "ip_tos parse error");
+ return err;
+}
+EXPORT_SYMBOL_GPL(vcap_tc_flower_handler_ip_usage);