1 /*
2 * Copyright(c) 2016 - 2018 Intel Corporation.
3 *
4 * This file is provided under a dual BSD/GPLv2 license. When using or
5 * redistributing this file, you may do so under either license.
6 *
7 * GPL LICENSE SUMMARY
8 *
9 * This program is free software; you can redistribute it and/or modify
10 * it under the terms of version 2 of the GNU General Public License as
11 * published by the Free Software Foundation.
12 *
13 * This program is distributed in the hope that it will be useful, but
14 * WITHOUT ANY WARRANTY; without even the implied warranty of
15 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
16 * General Public License for more details.
17 *
18 * BSD LICENSE
19 *
20 * Redistribution and use in source and binary forms, with or without
21 * modification, are permitted provided that the following conditions
22 * are met:
23 *
24 * - Redistributions of source code must retain the above copyright
25 * notice, this list of conditions and the following disclaimer.
26 * - Redistributions in binary form must reproduce the above copyright
27 * notice, this list of conditions and the following disclaimer in
28 * the documentation and/or other materials provided with the
29 * distribution.
30 * - Neither the name of Intel Corporation nor the names of its
31 * contributors may be used to endorse or promote products derived
32 * from this software without specific prior written permission.
33 *
34 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
35 * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
36 * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
37 * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
38 * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
39 * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
40 * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
41 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
42 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
43 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
44 * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
45 *
46 */
47
48 #ifndef IB_HDRS_H
49 #define IB_HDRS_H
50
51 #include <linux/types.h>
52 #include <asm/unaligned.h>
53 #include <rdma/ib_verbs.h>
54
55 #define IB_SEQ_NAK (3 << 29)
56
57 /* AETH NAK opcode values */
58 #define IB_RNR_NAK 0x20
59 #define IB_NAK_PSN_ERROR 0x60
60 #define IB_NAK_INVALID_REQUEST 0x61
61 #define IB_NAK_REMOTE_ACCESS_ERROR 0x62
62 #define IB_NAK_REMOTE_OPERATIONAL_ERROR 0x63
63 #define IB_NAK_INVALID_RD_REQUEST 0x64
64
65 #define IB_BTH_REQ_ACK BIT(31)
66 #define IB_BTH_SOLICITED BIT(23)
67 #define IB_BTH_MIG_REQ BIT(22)
68
69 #define IB_GRH_VERSION 6
70 #define IB_GRH_VERSION_MASK 0xF
71 #define IB_GRH_VERSION_SHIFT 28
72 #define IB_GRH_TCLASS_MASK 0xFF
73 #define IB_GRH_TCLASS_SHIFT 20
74 #define IB_GRH_FLOW_MASK 0xFFFFF
75 #define IB_GRH_FLOW_SHIFT 0
76 #define IB_GRH_NEXT_HDR 0x1B
77 #define IB_FECN_SHIFT 31
78 #define IB_FECN_MASK 1
79 #define IB_FECN_SMASK BIT(IB_FECN_SHIFT)
80 #define IB_BECN_SHIFT 30
81 #define IB_BECN_MASK 1
82 #define IB_BECN_SMASK BIT(IB_BECN_SHIFT)
83
84 #define IB_AETH_CREDIT_SHIFT 24
85 #define IB_AETH_CREDIT_MASK 0x1F
86 #define IB_AETH_CREDIT_INVAL 0x1F
87 #define IB_AETH_NAK_SHIFT 29
88 #define IB_MSN_MASK 0xFFFFFF
89
90 struct ib_reth {
91 __be64 vaddr; /* potentially unaligned */
92 __be32 rkey;
93 __be32 length;
94 } __packed;
95
96 struct ib_atomic_eth {
97 __be64 vaddr; /* potentially unaligned */
98 __be32 rkey;
99 __be64 swap_data; /* potentially unaligned */
100 __be64 compare_data; /* potentially unaligned */
101 } __packed;
102
103 #include <rdma/tid_rdma_defs.h>
104
105 union ib_ehdrs {
106 struct {
107 __be32 deth[2];
108 __be32 imm_data;
109 } ud;
110 struct {
111 struct ib_reth reth;
112 __be32 imm_data;
113 } rc;
114 struct {
115 __be32 aeth;
116 __be64 atomic_ack_eth; /* potentially unaligned */
117 } __packed at;
118 __be32 imm_data;
119 __be32 aeth;
120 __be32 ieth;
121 struct ib_atomic_eth atomic_eth;
122 /* TID RDMA headers */
123 union {
124 struct tid_rdma_read_req r_req;
125 struct tid_rdma_read_resp r_rsp;
126 struct tid_rdma_write_req w_req;
127 struct tid_rdma_write_resp w_rsp;
128 struct tid_rdma_write_data w_data;
129 struct tid_rdma_resync resync;
130 struct tid_rdma_ack ack;
131 } tid_rdma;
132 } __packed;
133
134 struct ib_other_headers {
135 __be32 bth[3];
136 union ib_ehdrs u;
137 } __packed;
138
139 struct ib_header {
140 __be16 lrh[4];
141 union {
142 struct {
143 struct ib_grh grh;
144 struct ib_other_headers oth;
145 } l;
146 struct ib_other_headers oth;
147 } u;
148 } __packed;
149
150 /* accessors for unaligned __be64 items */
151
ib_u64_get(__be64 * p)152 static inline u64 ib_u64_get(__be64 *p)
153 {
154 return get_unaligned_be64(p);
155 }
156
ib_u64_put(u64 val,__be64 * p)157 static inline void ib_u64_put(u64 val, __be64 *p)
158 {
159 put_unaligned_be64(val, p);
160 }
161
get_ib_reth_vaddr(struct ib_reth * reth)162 static inline u64 get_ib_reth_vaddr(struct ib_reth *reth)
163 {
164 return ib_u64_get(&reth->vaddr);
165 }
166
put_ib_reth_vaddr(u64 val,struct ib_reth * reth)167 static inline void put_ib_reth_vaddr(u64 val, struct ib_reth *reth)
168 {
169 ib_u64_put(val, &reth->vaddr);
170 }
171
get_ib_ateth_vaddr(struct ib_atomic_eth * ateth)172 static inline u64 get_ib_ateth_vaddr(struct ib_atomic_eth *ateth)
173 {
174 return ib_u64_get(&ateth->vaddr);
175 }
176
put_ib_ateth_vaddr(u64 val,struct ib_atomic_eth * ateth)177 static inline void put_ib_ateth_vaddr(u64 val, struct ib_atomic_eth *ateth)
178 {
179 ib_u64_put(val, &ateth->vaddr);
180 }
181
get_ib_ateth_swap(struct ib_atomic_eth * ateth)182 static inline u64 get_ib_ateth_swap(struct ib_atomic_eth *ateth)
183 {
184 return ib_u64_get(&ateth->swap_data);
185 }
186
put_ib_ateth_swap(u64 val,struct ib_atomic_eth * ateth)187 static inline void put_ib_ateth_swap(u64 val, struct ib_atomic_eth *ateth)
188 {
189 ib_u64_put(val, &ateth->swap_data);
190 }
191
get_ib_ateth_compare(struct ib_atomic_eth * ateth)192 static inline u64 get_ib_ateth_compare(struct ib_atomic_eth *ateth)
193 {
194 return ib_u64_get(&ateth->compare_data);
195 }
196
put_ib_ateth_compare(u64 val,struct ib_atomic_eth * ateth)197 static inline void put_ib_ateth_compare(u64 val, struct ib_atomic_eth *ateth)
198 {
199 ib_u64_put(val, &ateth->compare_data);
200 }
201
202 /*
203 * 9B/IB Packet Format
204 */
205 #define IB_LNH_MASK 3
206 #define IB_SC_MASK 0xf
207 #define IB_SC_SHIFT 12
208 #define IB_SC5_MASK 0x10
209 #define IB_SL_MASK 0xf
210 #define IB_SL_SHIFT 4
211 #define IB_SL_SHIFT 4
212 #define IB_LVER_MASK 0xf
213 #define IB_LVER_SHIFT 8
214
ib_get_lnh(struct ib_header * hdr)215 static inline u8 ib_get_lnh(struct ib_header *hdr)
216 {
217 return (be16_to_cpu(hdr->lrh[0]) & IB_LNH_MASK);
218 }
219
ib_get_sc(struct ib_header * hdr)220 static inline u8 ib_get_sc(struct ib_header *hdr)
221 {
222 return ((be16_to_cpu(hdr->lrh[0]) >> IB_SC_SHIFT) & IB_SC_MASK);
223 }
224
ib_is_sc5(u16 sc5)225 static inline bool ib_is_sc5(u16 sc5)
226 {
227 return !!(sc5 & IB_SC5_MASK);
228 }
229
ib_get_sl(struct ib_header * hdr)230 static inline u8 ib_get_sl(struct ib_header *hdr)
231 {
232 return ((be16_to_cpu(hdr->lrh[0]) >> IB_SL_SHIFT) & IB_SL_MASK);
233 }
234
ib_get_dlid(struct ib_header * hdr)235 static inline u16 ib_get_dlid(struct ib_header *hdr)
236 {
237 return (be16_to_cpu(hdr->lrh[1]));
238 }
239
ib_get_slid(struct ib_header * hdr)240 static inline u16 ib_get_slid(struct ib_header *hdr)
241 {
242 return (be16_to_cpu(hdr->lrh[3]));
243 }
244
ib_get_lver(struct ib_header * hdr)245 static inline u8 ib_get_lver(struct ib_header *hdr)
246 {
247 return (u8)((be16_to_cpu(hdr->lrh[0]) >> IB_LVER_SHIFT) &
248 IB_LVER_MASK);
249 }
250
ib_get_len(struct ib_header * hdr)251 static inline u16 ib_get_len(struct ib_header *hdr)
252 {
253 return (u16)(be16_to_cpu(hdr->lrh[2]));
254 }
255
ib_get_qkey(struct ib_other_headers * ohdr)256 static inline u32 ib_get_qkey(struct ib_other_headers *ohdr)
257 {
258 return be32_to_cpu(ohdr->u.ud.deth[0]);
259 }
260
ib_get_sqpn(struct ib_other_headers * ohdr)261 static inline u32 ib_get_sqpn(struct ib_other_headers *ohdr)
262 {
263 return ((be32_to_cpu(ohdr->u.ud.deth[1])) & IB_QPN_MASK);
264 }
265
266 /*
267 * BTH
268 */
269 #define IB_BTH_OPCODE_MASK 0xff
270 #define IB_BTH_OPCODE_SHIFT 24
271 #define IB_BTH_PAD_MASK 3
272 #define IB_BTH_PKEY_MASK 0xffff
273 #define IB_BTH_PAD_SHIFT 20
274 #define IB_BTH_A_MASK 1
275 #define IB_BTH_A_SHIFT 31
276 #define IB_BTH_M_MASK 1
277 #define IB_BTH_M_SHIFT 22
278 #define IB_BTH_SE_MASK 1
279 #define IB_BTH_SE_SHIFT 23
280 #define IB_BTH_TVER_MASK 0xf
281 #define IB_BTH_TVER_SHIFT 16
282
ib_bth_get_pad(struct ib_other_headers * ohdr)283 static inline u8 ib_bth_get_pad(struct ib_other_headers *ohdr)
284 {
285 return ((be32_to_cpu(ohdr->bth[0]) >> IB_BTH_PAD_SHIFT) &
286 IB_BTH_PAD_MASK);
287 }
288
ib_bth_get_pkey(struct ib_other_headers * ohdr)289 static inline u16 ib_bth_get_pkey(struct ib_other_headers *ohdr)
290 {
291 return (be32_to_cpu(ohdr->bth[0]) & IB_BTH_PKEY_MASK);
292 }
293
ib_bth_get_opcode(struct ib_other_headers * ohdr)294 static inline u8 ib_bth_get_opcode(struct ib_other_headers *ohdr)
295 {
296 return ((be32_to_cpu(ohdr->bth[0]) >> IB_BTH_OPCODE_SHIFT) &
297 IB_BTH_OPCODE_MASK);
298 }
299
ib_bth_get_ackreq(struct ib_other_headers * ohdr)300 static inline u8 ib_bth_get_ackreq(struct ib_other_headers *ohdr)
301 {
302 return (u8)((be32_to_cpu(ohdr->bth[2]) >> IB_BTH_A_SHIFT) &
303 IB_BTH_A_MASK);
304 }
305
ib_bth_get_migreq(struct ib_other_headers * ohdr)306 static inline u8 ib_bth_get_migreq(struct ib_other_headers *ohdr)
307 {
308 return (u8)((be32_to_cpu(ohdr->bth[0]) >> IB_BTH_M_SHIFT) &
309 IB_BTH_M_MASK);
310 }
311
ib_bth_get_se(struct ib_other_headers * ohdr)312 static inline u8 ib_bth_get_se(struct ib_other_headers *ohdr)
313 {
314 return (u8)((be32_to_cpu(ohdr->bth[0]) >> IB_BTH_SE_SHIFT) &
315 IB_BTH_SE_MASK);
316 }
317
ib_bth_get_psn(struct ib_other_headers * ohdr)318 static inline u32 ib_bth_get_psn(struct ib_other_headers *ohdr)
319 {
320 return (u32)(be32_to_cpu(ohdr->bth[2]));
321 }
322
ib_bth_get_qpn(struct ib_other_headers * ohdr)323 static inline u32 ib_bth_get_qpn(struct ib_other_headers *ohdr)
324 {
325 return (u32)((be32_to_cpu(ohdr->bth[1])) & IB_QPN_MASK);
326 }
327
ib_bth_get_becn(struct ib_other_headers * ohdr)328 static inline bool ib_bth_get_becn(struct ib_other_headers *ohdr)
329 {
330 return (ohdr->bth[1]) & cpu_to_be32(IB_BECN_SMASK);
331 }
332
ib_bth_get_fecn(struct ib_other_headers * ohdr)333 static inline bool ib_bth_get_fecn(struct ib_other_headers *ohdr)
334 {
335 return (ohdr->bth[1]) & cpu_to_be32(IB_FECN_SMASK);
336 }
337
ib_bth_get_tver(struct ib_other_headers * ohdr)338 static inline u8 ib_bth_get_tver(struct ib_other_headers *ohdr)
339 {
340 return (u8)((be32_to_cpu(ohdr->bth[0]) >> IB_BTH_TVER_SHIFT) &
341 IB_BTH_TVER_MASK);
342 }
343
ib_bth_is_solicited(struct ib_other_headers * ohdr)344 static inline bool ib_bth_is_solicited(struct ib_other_headers *ohdr)
345 {
346 return ohdr->bth[0] & cpu_to_be32(IB_BTH_SOLICITED);
347 }
348
ib_bth_is_migration(struct ib_other_headers * ohdr)349 static inline bool ib_bth_is_migration(struct ib_other_headers *ohdr)
350 {
351 return ohdr->bth[0] & cpu_to_be32(IB_BTH_MIG_REQ);
352 }
353 #endif /* IB_HDRS_H */
354