1 /*
2 * Copyright (c) 2016 Chelsio Communications, Inc. All rights reserved.
3 *
4 * This software is available to you under a choice of one of two
5 * licenses. You may choose to be licensed under the terms of the GNU
6 * General Public License (GPL) Version 2, available from the file
7 * COPYING in the main directory of this source tree, or the
8 * OpenIB.org BSD license below:
9 *
10 * Redistribution and use in source and binary forms, with or
11 * without modification, are permitted provided that the following
12 * conditions are met:
13 *
14 * - Redistributions of source code must retain the above
15 * copyright notice, this list of conditions and the following
16 * disclaimer.
17 *
18 * - Redistributions in binary form must reproduce the above
19 * copyright notice, this list of conditions and the following
20 * disclaimer in the documentation and/or other materials
21 * provided with the distribution.
22 *
23 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
24 * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
25 * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
26 * NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS
27 * BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN
28 * ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
29 * CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
30 * SOFTWARE.
31 */
32
33 #ifndef __LIBCXGB_CM_H__
34 #define __LIBCXGB_CM_H__
35
36
37 #include <net/tcp.h>
38
39 #include <cxgb4.h>
40 #include <t4_msg.h>
41 #include <l2t.h>
42
43 void
44 cxgb_get_4tuple(struct cpl_pass_accept_req *, enum chip_type,
45 int *, __u8 *, __u8 *, __be16 *, __be16 *);
46 struct dst_entry *
47 cxgb_find_route(struct cxgb4_lld_info *,
48 struct net_device *(*)(struct net_device *),
49 __be32, __be32, __be16, __be16, u8);
50 struct dst_entry *
51 cxgb_find_route6(struct cxgb4_lld_info *,
52 struct net_device *(*)(struct net_device *),
53 __u8 *, __u8 *, __be16, __be16, u8, __u32);
54
55 /* Returns whether a CPL status conveys negative advice.
56 */
cxgb_is_neg_adv(unsigned int status)57 static inline bool cxgb_is_neg_adv(unsigned int status)
58 {
59 return status == CPL_ERR_RTX_NEG_ADVICE ||
60 status == CPL_ERR_PERSIST_NEG_ADVICE ||
61 status == CPL_ERR_KEEPALV_NEG_ADVICE;
62 }
63
64 static inline void
cxgb_best_mtu(const unsigned short * mtus,unsigned short mtu,unsigned int * idx,int use_ts,int ipv6)65 cxgb_best_mtu(const unsigned short *mtus, unsigned short mtu,
66 unsigned int *idx, int use_ts, int ipv6)
67 {
68 unsigned short hdr_size = (ipv6 ?
69 sizeof(struct ipv6hdr) :
70 sizeof(struct iphdr)) +
71 sizeof(struct tcphdr) +
72 (use_ts ?
73 round_up(TCPOLEN_TIMESTAMP, 4) : 0);
74 unsigned short data_size = mtu - hdr_size;
75
76 cxgb4_best_aligned_mtu(mtus, hdr_size, data_size, 8, idx);
77 }
78
cxgb_compute_wscale(u32 win)79 static inline u32 cxgb_compute_wscale(u32 win)
80 {
81 u32 wscale = 0;
82
83 while (wscale < 14 && (65535 << wscale) < win)
84 wscale++;
85 return wscale;
86 }
87
88 static inline void
cxgb_mk_tid_release(struct sk_buff * skb,u32 len,u32 tid,u16 chan)89 cxgb_mk_tid_release(struct sk_buff *skb, u32 len, u32 tid, u16 chan)
90 {
91 struct cpl_tid_release *req;
92
93 req = __skb_put(skb, len);
94 memset(req, 0, len);
95
96 INIT_TP_WR(req, tid);
97 OPCODE_TID(req) = cpu_to_be32(MK_OPCODE_TID(CPL_TID_RELEASE, tid));
98 set_wr_txq(skb, CPL_PRIORITY_SETUP, chan);
99 }
100
101 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)102 cxgb_mk_close_con_req(struct sk_buff *skb, u32 len, u32 tid, u16 chan,
103 void *handle, arp_err_handler_t handler)
104 {
105 struct cpl_close_con_req *req;
106
107 req = __skb_put(skb, len);
108 memset(req, 0, len);
109
110 INIT_TP_WR(req, tid);
111 OPCODE_TID(req) = cpu_to_be32(MK_OPCODE_TID(CPL_CLOSE_CON_REQ, tid));
112 set_wr_txq(skb, CPL_PRIORITY_DATA, chan);
113 t4_set_arp_err_handler(skb, handle, handler);
114 }
115
116 static inline void
cxgb_mk_abort_req(struct sk_buff * skb,u32 len,u32 tid,u16 chan,void * handle,arp_err_handler_t handler)117 cxgb_mk_abort_req(struct sk_buff *skb, u32 len, u32 tid, u16 chan,
118 void *handle, arp_err_handler_t handler)
119 {
120 struct cpl_abort_req *req;
121
122 req = __skb_put(skb, len);
123 memset(req, 0, len);
124
125 INIT_TP_WR(req, tid);
126 OPCODE_TID(req) = cpu_to_be32(MK_OPCODE_TID(CPL_ABORT_REQ, tid));
127 req->cmd = CPL_ABORT_SEND_RST;
128 set_wr_txq(skb, CPL_PRIORITY_DATA, chan);
129 t4_set_arp_err_handler(skb, handle, handler);
130 }
131
132 static inline void
cxgb_mk_abort_rpl(struct sk_buff * skb,u32 len,u32 tid,u16 chan)133 cxgb_mk_abort_rpl(struct sk_buff *skb, u32 len, u32 tid, u16 chan)
134 {
135 struct cpl_abort_rpl *rpl;
136
137 rpl = __skb_put(skb, len);
138 memset(rpl, 0, len);
139
140 INIT_TP_WR(rpl, tid);
141 OPCODE_TID(rpl) = cpu_to_be32(MK_OPCODE_TID(CPL_ABORT_RPL, tid));
142 rpl->cmd = CPL_ABORT_NO_RST;
143 set_wr_txq(skb, CPL_PRIORITY_DATA, chan);
144 }
145
146 static inline void
cxgb_mk_rx_data_ack(struct sk_buff * skb,u32 len,u32 tid,u16 chan,u32 credit_dack)147 cxgb_mk_rx_data_ack(struct sk_buff *skb, u32 len, u32 tid, u16 chan,
148 u32 credit_dack)
149 {
150 struct cpl_rx_data_ack *req;
151
152 req = __skb_put(skb, len);
153 memset(req, 0, len);
154
155 INIT_TP_WR(req, tid);
156 OPCODE_TID(req) = cpu_to_be32(MK_OPCODE_TID(CPL_RX_DATA_ACK, tid));
157 req->credit_dack = cpu_to_be32(credit_dack);
158 set_wr_txq(skb, CPL_PRIORITY_ACK, chan);
159 }
160 #endif
161