diff options
Diffstat (limited to 'drivers/net/ethernet/chelsio/libcxgb')
| -rw-r--r-- | drivers/net/ethernet/chelsio/libcxgb/Makefile | 4 | ||||
| -rw-r--r-- | drivers/net/ethernet/chelsio/libcxgb/libcxgb_cm.c | 149 | ||||
| -rw-r--r-- | drivers/net/ethernet/chelsio/libcxgb/libcxgb_cm.h | 160 |
3 files changed, 312 insertions, 1 deletions
diff --git a/drivers/net/ethernet/chelsio/libcxgb/Makefile b/drivers/net/ethernet/chelsio/libcxgb/Makefile index 2362230ef4fe..2534e30a1560 100644 --- a/drivers/net/ethernet/chelsio/libcxgb/Makefile +++ b/drivers/net/ethernet/chelsio/libcxgb/Makefile @@ -1,3 +1,5 @@ +ccflags-y := -Idrivers/net/ethernet/chelsio/cxgb4 + obj-$(CONFIG_CHELSIO_LIB) += libcxgb.o -libcxgb-y := libcxgb_ppm.o +libcxgb-y := libcxgb_ppm.o libcxgb_cm.o diff --git a/drivers/net/ethernet/chelsio/libcxgb/libcxgb_cm.c b/drivers/net/ethernet/chelsio/libcxgb/libcxgb_cm.c new file mode 100644 index 000000000000..0f0de5b63622 --- /dev/null +++ b/drivers/net/ethernet/chelsio/libcxgb/libcxgb_cm.c @@ -0,0 +1,149 @@ +/* + * Copyright (c) 2016 Chelsio Communications, Inc. All rights reserved. + * + * This software is available to you under a choice of one of two + * licenses. You may choose to be licensed under the terms of the GNU + * General Public License (GPL) Version 2, available from the file + * COPYING in the main directory of this source tree, or the + * OpenIB.org BSD license below: + * + * Redistribution and use in source and binary forms, with or + * without modification, are permitted provided that the following + * conditions are met: + * + * - Redistributions of source code must retain the above + * copyright notice, this list of conditions and the following + * disclaimer. + * + * - Redistributions in binary form must reproduce the above + * copyright notice, this list of conditions and the following + * disclaimer in the documentation and/or other materials + * provided with the distribution. + * + * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, + * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF + * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND + * NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS + * BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN + * ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN + * CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE + * SOFTWARE. + */ + +#include <linux/tcp.h> +#include <linux/ipv6.h> +#include <net/route.h> +#include <net/ip6_route.h> + +#include "libcxgb_cm.h" + +void +cxgb_get_4tuple(struct cpl_pass_accept_req *req, enum chip_type type, + int *iptype, __u8 *local_ip, __u8 *peer_ip, + __be16 *local_port, __be16 *peer_port) +{ + int eth_len = (CHELSIO_CHIP_VERSION(type) <= CHELSIO_T5) ? + ETH_HDR_LEN_G(be32_to_cpu(req->hdr_len)) : + T6_ETH_HDR_LEN_G(be32_to_cpu(req->hdr_len)); + int ip_len = (CHELSIO_CHIP_VERSION(type) <= CHELSIO_T5) ? + IP_HDR_LEN_G(be32_to_cpu(req->hdr_len)) : + T6_IP_HDR_LEN_G(be32_to_cpu(req->hdr_len)); + struct iphdr *ip = (struct iphdr *)((u8 *)(req + 1) + eth_len); + struct ipv6hdr *ip6 = (struct ipv6hdr *)((u8 *)(req + 1) + eth_len); + struct tcphdr *tcp = (struct tcphdr *) + ((u8 *)(req + 1) + eth_len + ip_len); + + if (ip->version == 4) { + pr_debug("%s saddr 0x%x daddr 0x%x sport %u dport %u\n", + __func__, ntohl(ip->saddr), ntohl(ip->daddr), + ntohs(tcp->source), ntohs(tcp->dest)); + *iptype = 4; + memcpy(peer_ip, &ip->saddr, 4); + memcpy(local_ip, &ip->daddr, 4); + } else { + pr_debug("%s saddr %pI6 daddr %pI6 sport %u dport %u\n", + __func__, ip6->saddr.s6_addr, ip6->daddr.s6_addr, + ntohs(tcp->source), ntohs(tcp->dest)); + *iptype = 6; + memcpy(peer_ip, ip6->saddr.s6_addr, 16); + memcpy(local_ip, ip6->daddr.s6_addr, 16); + } + *peer_port = tcp->source; + *local_port = tcp->dest; +} +EXPORT_SYMBOL(cxgb_get_4tuple); + +static bool +cxgb_our_interface(struct cxgb4_lld_info *lldi, + struct net_device *(*get_real_dev)(struct net_device *), + struct net_device *egress_dev) +{ + int i; + + egress_dev = get_real_dev(egress_dev); + for (i = 0; i < lldi->nports; i++) + if (lldi->ports[i] == egress_dev) + return true; + return false; +} + +struct dst_entry * +cxgb_find_route(struct cxgb4_lld_info *lldi, + struct net_device *(*get_real_dev)(struct net_device *), + __be32 local_ip, __be32 peer_ip, __be16 local_port, + __be16 peer_port, u8 tos) +{ + struct rtable *rt; + struct flowi4 fl4; + struct neighbour *n; + + rt = ip_route_output_ports(&init_net, &fl4, NULL, peer_ip, local_ip, + peer_port, local_port, IPPROTO_TCP, + tos, 0); + if (IS_ERR(rt)) + return NULL; + n = dst_neigh_lookup(&rt->dst, &peer_ip); + if (!n) + return NULL; + if (!cxgb_our_interface(lldi, get_real_dev, n->dev) && + !(n->dev->flags & IFF_LOOPBACK)) { + neigh_release(n); + dst_release(&rt->dst); + return NULL; + } + neigh_release(n); + return &rt->dst; +} +EXPORT_SYMBOL(cxgb_find_route); + +struct dst_entry * +cxgb_find_route6(struct cxgb4_lld_info *lldi, + struct net_device *(*get_real_dev)(struct net_device *), + __u8 *local_ip, __u8 *peer_ip, __be16 local_port, + __be16 peer_port, u8 tos, __u32 sin6_scope_id) +{ + struct dst_entry *dst = NULL; + + if (IS_ENABLED(CONFIG_IPV6)) { + struct flowi6 fl6; + + memset(&fl6, 0, sizeof(fl6)); + memcpy(&fl6.daddr, peer_ip, 16); + memcpy(&fl6.saddr, local_ip, 16); + if (ipv6_addr_type(&fl6.daddr) & IPV6_ADDR_LINKLOCAL) + fl6.flowi6_oif = sin6_scope_id; + dst = ip6_route_output(&init_net, NULL, &fl6); + if (!dst) + goto out; + if (!cxgb_our_interface(lldi, get_real_dev, + ip6_dst_idev(dst)->dev) && + !(ip6_dst_idev(dst)->dev->flags & IFF_LOOPBACK)) { + dst_release(dst); + dst = NULL; + } + } + +out: + return dst; +} +EXPORT_SYMBOL(cxgb_find_route6); diff --git a/drivers/net/ethernet/chelsio/libcxgb/libcxgb_cm.h b/drivers/net/ethernet/chelsio/libcxgb/libcxgb_cm.h new file mode 100644 index 000000000000..515b94ff9080 --- /dev/null +++ b/drivers/net/ethernet/chelsio/libcxgb/libcxgb_cm.h @@ -0,0 +1,160 @@ +/* + * Copyright (c) 2016 Chelsio Communications, Inc. All rights reserved. + * + * This software is available to you under a choice of one of two + * licenses. You may choose to be licensed under the terms of the GNU + * General Public License (GPL) Version 2, available from the file + * COPYING in the main directory of this source tree, or the + * OpenIB.org BSD license below: + * + * Redistribution and use in source and binary forms, with or + * without modification, are permitted provided that the following + * conditions are met: + * + * - Redistributions of source code must retain the above + * copyright notice, this list of conditions and the following + * disclaimer. + * + * - Redistributions in binary form must reproduce the above + * copyright notice, this list of conditions and the following + * disclaimer in the documentation and/or other materials + * provided with the distribution. + * + * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, + * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF + * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND + * NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS + * BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN + * ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN + * CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE + * SOFTWARE. + */ + +#ifndef __LIBCXGB_CM_H__ +#define __LIBCXGB_CM_H__ + + +#include <net/tcp.h> + +#include <cxgb4.h> +#include <t4_msg.h> +#include <l2t.h> + +void +cxgb_get_4tuple(struct cpl_pass_accept_req *, enum chip_type, + int *, __u8 *, __u8 *, __be16 *, __be16 *); +struct dst_entry * +cxgb_find_route(struct cxgb4_lld_info *, + struct net_device *(*)(struct net_device *), + __be32, __be32, __be16, __be16, u8); +struct dst_entry * +cxgb_find_route6(struct cxgb4_lld_info *, + struct net_device *(*)(struct net_device *), + __u8 *, __u8 *, __be16, __be16, u8, __u32); + +/* Returns whether a CPL status conveys negative advice. + */ +static inline bool cxgb_is_neg_adv(unsigned int status) +{ + return status == CPL_ERR_RTX_NEG_ADVICE || + status == CPL_ERR_PERSIST_NEG_ADVICE || + status == CPL_ERR_KEEPALV_NEG_ADVICE; +} + +static inline void +cxgb_best_mtu(const unsigned short *mtus, unsigned short mtu, + unsigned int *idx, int use_ts, int ipv6) +{ + unsigned short hdr_size = (ipv6 ? + sizeof(struct ipv6hdr) : + sizeof(struct iphdr)) + + sizeof(struct tcphdr) + + (use_ts ? + round_up(TCPOLEN_TIMESTAMP, 4) : 0); + unsigned short data_size = mtu - hdr_size; + + cxgb4_best_aligned_mtu(mtus, hdr_size, data_size, 8, idx); +} + +static inline u32 cxgb_compute_wscale(u32 win) +{ + u32 wscale = 0; + + while (wscale < 14 && (65535 << wscale) < win) + wscale++; + return wscale; +} + +static inline void +cxgb_mk_tid_release(struct sk_buff *skb, u32 len, u32 tid, u16 chan) +{ + struct cpl_tid_release *req; + + req = (struct cpl_tid_release *)__skb_put(skb, len); + memset(req, 0, len); + + INIT_TP_WR(req, tid); + OPCODE_TID(req) = cpu_to_be32(MK_OPCODE_TID(CPL_TID_RELEASE, tid)); + set_wr_txq(skb, CPL_PRIORITY_SETUP, chan); +} + +static inline void +cxgb_mk_close_con_req(struct sk_buff *skb, u32 len, u32 tid, u16 chan, + void *handle, arp_err_handler_t handler) +{ + struct cpl_close_con_req *req; + + req = (struct cpl_close_con_req *)__skb_put(skb, len); + memset(req, 0, len); + + INIT_TP_WR(req, tid); + OPCODE_TID(req) = cpu_to_be32(MK_OPCODE_TID(CPL_CLOSE_CON_REQ, tid)); + set_wr_txq(skb, CPL_PRIORITY_DATA, chan); + t4_set_arp_err_handler(skb, handle, handler); +} + +static inline void +cxgb_mk_abort_req(struct sk_buff *skb, u32 len, u32 tid, u16 chan, + void *handle, arp_err_handler_t handler) +{ + struct cpl_abort_req *req; + + req = (struct cpl_abort_req *)__skb_put(skb, len); + memset(req, 0, len); + + INIT_TP_WR(req, tid); + OPCODE_TID(req) = cpu_to_be32(MK_OPCODE_TID(CPL_ABORT_REQ, tid)); + req->cmd = CPL_ABORT_SEND_RST; + set_wr_txq(skb, CPL_PRIORITY_DATA, chan); + t4_set_arp_err_handler(skb, handle, handler); +} + +static inline void +cxgb_mk_abort_rpl(struct sk_buff *skb, u32 len, u32 tid, u16 chan) +{ + struct cpl_abort_rpl *rpl; + + rpl = (struct cpl_abort_rpl *)__skb_put(skb, len); + memset(rpl, 0, len); + + INIT_TP_WR(rpl, tid); + OPCODE_TID(rpl) = cpu_to_be32(MK_OPCODE_TID(CPL_ABORT_RPL, tid)); + rpl->cmd = CPL_ABORT_NO_RST; + set_wr_txq(skb, CPL_PRIORITY_DATA, chan); +} + +static inline void +cxgb_mk_rx_data_ack(struct sk_buff *skb, u32 len, u32 tid, u16 chan, + u32 credit_dack) +{ + struct cpl_rx_data_ack *req; + + req = (struct cpl_rx_data_ack *)__skb_put(skb, len); + memset(req, 0, len); + + INIT_TP_WR(req, tid); + OPCODE_TID(req) = cpu_to_be32(MK_OPCODE_TID(CPL_RX_DATA_ACK, tid)); + req->credit_dack = cpu_to_be32(credit_dack); + set_wr_txq(skb, CPL_PRIORITY_ACK, chan); +} +#endif |