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 | */ |
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 |
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 | |
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 |
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_zero(skb, len); |
94 | |
95 | INIT_TP_WR(req, tid); |
96 | OPCODE_TID(req) = cpu_to_be32(MK_OPCODE_TID(CPL_TID_RELEASE, tid)); |
97 | set_wr_txq(skb, CPL_PRIORITY_SETUP, chan); |
98 | } |
99 | |
100 | static inline void |
101 | cxgb_mk_close_con_req(struct sk_buff *skb, u32 len, u32 tid, u16 chan, |
102 | void *handle, arp_err_handler_t handler) |
103 | { |
104 | struct cpl_close_con_req *req; |
105 | |
106 | req = __skb_put_zero(skb, len); |
107 | |
108 | INIT_TP_WR(req, tid); |
109 | OPCODE_TID(req) = cpu_to_be32(MK_OPCODE_TID(CPL_CLOSE_CON_REQ, tid)); |
110 | set_wr_txq(skb, CPL_PRIORITY_DATA, chan); |
111 | t4_set_arp_err_handler(skb, handle, handler); |
112 | } |
113 | |
114 | static inline void |
115 | cxgb_mk_abort_req(struct sk_buff *skb, u32 len, u32 tid, u16 chan, |
116 | void *handle, arp_err_handler_t handler) |
117 | { |
118 | struct cpl_abort_req *req; |
119 | |
120 | req = __skb_put_zero(skb, len); |
121 | |
122 | INIT_TP_WR(req, tid); |
123 | OPCODE_TID(req) = cpu_to_be32(MK_OPCODE_TID(CPL_ABORT_REQ, tid)); |
124 | req->cmd = CPL_ABORT_SEND_RST; |
125 | set_wr_txq(skb, CPL_PRIORITY_DATA, chan); |
126 | t4_set_arp_err_handler(skb, handle, handler); |
127 | } |
128 | |
129 | static inline void |
130 | cxgb_mk_abort_rpl(struct sk_buff *skb, u32 len, u32 tid, u16 chan) |
131 | { |
132 | struct cpl_abort_rpl *rpl; |
133 | |
134 | rpl = __skb_put_zero(skb, len); |
135 | |
136 | INIT_TP_WR(rpl, tid); |
137 | OPCODE_TID(rpl) = cpu_to_be32(MK_OPCODE_TID(CPL_ABORT_RPL, tid)); |
138 | rpl->cmd = CPL_ABORT_NO_RST; |
139 | set_wr_txq(skb, CPL_PRIORITY_DATA, chan); |
140 | } |
141 | |
142 | static inline void |
143 | cxgb_mk_rx_data_ack(struct sk_buff *skb, u32 len, u32 tid, u16 chan, |
144 | u32 credit_dack) |
145 | { |
146 | struct cpl_rx_data_ack *req; |
147 | |
148 | req = __skb_put_zero(skb, len); |
149 | |
150 | INIT_TP_WR(req, tid); |
151 | OPCODE_TID(req) = cpu_to_be32(MK_OPCODE_TID(CPL_RX_DATA_ACK, tid)); |
152 | req->credit_dack = cpu_to_be32(credit_dack); |
153 | set_wr_txq(skb, CPL_PRIORITY_ACK, chan); |
154 | } |
155 | #endif |
156 | |