1 /* SPDX-License-Identifier: GPL-2.0 OR BSD-3-Clause */
2 /*
3 * Copyright(c) 2016 - 2018 Intel Corporation.
4 */
5
6 #ifndef IB_HDRS_H
7 #define IB_HDRS_H
8
9 #include <linux/types.h>
10 #include <asm/unaligned.h>
11 #include <rdma/ib_verbs.h>
12
13 #define IB_SEQ_NAK (3 << 29)
14
15 /* AETH NAK opcode values */
16 #define IB_RNR_NAK 0x20
17 #define IB_NAK_PSN_ERROR 0x60
18 #define IB_NAK_INVALID_REQUEST 0x61
19 #define IB_NAK_REMOTE_ACCESS_ERROR 0x62
20 #define IB_NAK_REMOTE_OPERATIONAL_ERROR 0x63
21 #define IB_NAK_INVALID_RD_REQUEST 0x64
22
23 #define IB_BTH_REQ_ACK BIT(31)
24 #define IB_BTH_SOLICITED BIT(23)
25 #define IB_BTH_MIG_REQ BIT(22)
26
27 #define IB_GRH_VERSION 6
28 #define IB_GRH_VERSION_MASK 0xF
29 #define IB_GRH_VERSION_SHIFT 28
30 #define IB_GRH_TCLASS_MASK 0xFF
31 #define IB_GRH_TCLASS_SHIFT 20
32 #define IB_GRH_FLOW_MASK 0xFFFFF
33 #define IB_GRH_FLOW_SHIFT 0
34 #define IB_GRH_NEXT_HDR 0x1B
35 #define IB_FECN_SHIFT 31
36 #define IB_FECN_MASK 1
37 #define IB_FECN_SMASK BIT(IB_FECN_SHIFT)
38 #define IB_BECN_SHIFT 30
39 #define IB_BECN_MASK 1
40 #define IB_BECN_SMASK BIT(IB_BECN_SHIFT)
41
42 #define IB_AETH_CREDIT_SHIFT 24
43 #define IB_AETH_CREDIT_MASK 0x1F
44 #define IB_AETH_CREDIT_INVAL 0x1F
45 #define IB_AETH_NAK_SHIFT 29
46 #define IB_MSN_MASK 0xFFFFFF
47
48 struct ib_reth {
49 __be64 vaddr; /* potentially unaligned */
50 __be32 rkey;
51 __be32 length;
52 } __packed;
53
54 struct ib_atomic_eth {
55 __be64 vaddr; /* potentially unaligned */
56 __be32 rkey;
57 __be64 swap_data; /* potentially unaligned */
58 __be64 compare_data; /* potentially unaligned */
59 } __packed;
60
61 #include <rdma/tid_rdma_defs.h>
62
63 union ib_ehdrs {
64 struct {
65 __be32 deth[2];
66 __be32 imm_data;
67 } ud;
68 struct {
69 struct ib_reth reth;
70 __be32 imm_data;
71 } rc;
72 struct {
73 __be32 aeth;
74 __be64 atomic_ack_eth; /* potentially unaligned */
75 } __packed at;
76 __be32 imm_data;
77 __be32 aeth;
78 __be32 ieth;
79 struct ib_atomic_eth atomic_eth;
80 /* TID RDMA headers */
81 union {
82 struct tid_rdma_read_req r_req;
83 struct tid_rdma_read_resp r_rsp;
84 struct tid_rdma_write_req w_req;
85 struct tid_rdma_write_resp w_rsp;
86 struct tid_rdma_write_data w_data;
87 struct tid_rdma_resync resync;
88 struct tid_rdma_ack ack;
89 } tid_rdma;
90 } __packed;
91
92 struct ib_other_headers {
93 __be32 bth[3];
94 union ib_ehdrs u;
95 } __packed;
96
97 struct ib_header {
98 __be16 lrh[4];
99 union {
100 struct {
101 struct ib_grh grh;
102 struct ib_other_headers oth;
103 } l;
104 struct ib_other_headers oth;
105 } u;
106 } __packed;
107
108 /* accessors for unaligned __be64 items */
109
110 static inline u64 ib_u64_get(__be64 *p)
111 {
112 return get_unaligned_be64(p);
113 }
114
115 static inline void ib_u64_put(u64 val, __be64 *p)
116 {
117 put_unaligned_be64(val, p);
118 }
119
120 static inline u64 get_ib_reth_vaddr(struct ib_reth *reth)
121 {
122 return ib_u64_get(&reth->vaddr);
123 }
124
125 static inline void put_ib_reth_vaddr(u64 val, struct ib_reth *reth)
126 {
127 ib_u64_put(val, &reth->vaddr);
128 }
129
130 static inline u64 get_ib_ateth_vaddr(struct ib_atomic_eth *ateth)
131 {
132 return ib_u64_get(&ateth->vaddr);
133 }
134
135 static inline void put_ib_ateth_vaddr(u64 val, struct ib_atomic_eth *ateth)
136 {
137 ib_u64_put(val, &ateth->vaddr);
138 }
139
140 static inline u64 get_ib_ateth_swap(struct ib_atomic_eth *ateth)
141 {
142 return ib_u64_get(&ateth->swap_data);
143 }
144
145 static inline void put_ib_ateth_swap(u64 val, struct ib_atomic_eth *ateth)
146 {
147 ib_u64_put(val, &ateth->swap_data);
148 }
149
150 static inline u64 get_ib_ateth_compare(struct ib_atomic_eth *ateth)
151 {
152 return ib_u64_get(&ateth->compare_data);
153 }
154
155 static inline void put_ib_ateth_compare(u64 val, struct ib_atomic_eth *ateth)
156 {
157 ib_u64_put(val, &ateth->compare_data);
158 }
159
160 /*
161 * 9B/IB Packet Format
162 */
163 #define IB_LNH_MASK 3
164 #define IB_SC_MASK 0xf
165 #define IB_SC_SHIFT 12
166 #define IB_SC5_MASK 0x10
167 #define IB_SL_MASK 0xf
168 #define IB_SL_SHIFT 4
169 #define IB_SL_SHIFT 4
170 #define IB_LVER_MASK 0xf
171 #define IB_LVER_SHIFT 8
172
173 static inline u8 ib_get_lnh(struct ib_header *hdr)
174 {
175 return (be16_to_cpu(hdr->lrh[0]) & IB_LNH_MASK);
176 }
177
178 static inline u8 ib_get_sc(struct ib_header *hdr)
179 {
180 return ((be16_to_cpu(hdr->lrh[0]) >> IB_SC_SHIFT) & IB_SC_MASK);
181 }
182
183 static inline bool ib_is_sc5(u16 sc5)
184 {
185 return !!(sc5 & IB_SC5_MASK);
186 }
187
188 static inline u8 ib_get_sl(struct ib_header *hdr)
189 {
190 return ((be16_to_cpu(hdr->lrh[0]) >> IB_SL_SHIFT) & IB_SL_MASK);
191 }
192
193 static inline u16 ib_get_dlid(struct ib_header *hdr)
194 {
195 return (be16_to_cpu(hdr->lrh[1]));
196 }
197
198 static inline u16 ib_get_slid(struct ib_header *hdr)
199 {
200 return (be16_to_cpu(hdr->lrh[3]));
201 }
202
203 static inline u8 ib_get_lver(struct ib_header *hdr)
204 {
205 return (u8)((be16_to_cpu(hdr->lrh[0]) >> IB_LVER_SHIFT) &
206 IB_LVER_MASK);
207 }
208
209 static inline u32 ib_get_qkey(struct ib_other_headers *ohdr)
210 {
211 return be32_to_cpu(ohdr->u.ud.deth[0]);
212 }
213
214 static inline u32 ib_get_sqpn(struct ib_other_headers *ohdr)
215 {
216 return ((be32_to_cpu(ohdr->u.ud.deth[1])) & IB_QPN_MASK);
217 }
218
219 /*
220 * BTH
221 */
222 #define IB_BTH_OPCODE_MASK 0xff
223 #define IB_BTH_OPCODE_SHIFT 24
224 #define IB_BTH_PAD_MASK 3
225 #define IB_BTH_PKEY_MASK 0xffff
226 #define IB_BTH_PAD_SHIFT 20
227 #define IB_BTH_A_MASK 1
228 #define IB_BTH_A_SHIFT 31
229 #define IB_BTH_M_MASK 1
230 #define IB_BTH_M_SHIFT 22
231 #define IB_BTH_SE_MASK 1
232 #define IB_BTH_SE_SHIFT 23
233 #define IB_BTH_TVER_MASK 0xf
234 #define IB_BTH_TVER_SHIFT 16
235 #define IB_BTH_OPCODE_CNP 0x81
236
237 static inline u8 ib_bth_get_pad(struct ib_other_headers *ohdr)
238 {
239 return ((be32_to_cpu(ohdr->bth[0]) >> IB_BTH_PAD_SHIFT) &
240 IB_BTH_PAD_MASK);
241 }
242
243 static inline u16 ib_bth_get_pkey(struct ib_other_headers *ohdr)
244 {
245 return (be32_to_cpu(ohdr->bth[0]) & IB_BTH_PKEY_MASK);
246 }
247
248 static inline u8 ib_bth_get_opcode(struct ib_other_headers *ohdr)
249 {
250 return ((be32_to_cpu(ohdr->bth[0]) >> IB_BTH_OPCODE_SHIFT) &
251 IB_BTH_OPCODE_MASK);
252 }
253
254 static inline u8 ib_bth_get_ackreq(struct ib_other_headers *ohdr)
255 {
256 return (u8)((be32_to_cpu(ohdr->bth[2]) >> IB_BTH_A_SHIFT) &
257 IB_BTH_A_MASK);
258 }
259
260 static inline u8 ib_bth_get_migreq(struct ib_other_headers *ohdr)
261 {
262 return (u8)((be32_to_cpu(ohdr->bth[0]) >> IB_BTH_M_SHIFT) &
263 IB_BTH_M_MASK);
264 }
265
266 static inline u8 ib_bth_get_se(struct ib_other_headers *ohdr)
267 {
268 return (u8)((be32_to_cpu(ohdr->bth[0]) >> IB_BTH_SE_SHIFT) &
269 IB_BTH_SE_MASK);
270 }
271
272 static inline u32 ib_bth_get_psn(struct ib_other_headers *ohdr)
273 {
274 return (u32)(be32_to_cpu(ohdr->bth[2]));
275 }
276
277 static inline u32 ib_bth_get_qpn(struct ib_other_headers *ohdr)
278 {
279 return (u32)((be32_to_cpu(ohdr->bth[1])) & IB_QPN_MASK);
280 }
281
282 static inline bool ib_bth_get_becn(struct ib_other_headers *ohdr)
283 {
284 return (ohdr->bth[1]) & cpu_to_be32(IB_BECN_SMASK);
285 }
286
287 static inline bool ib_bth_get_fecn(struct ib_other_headers *ohdr)
288 {
289 return (ohdr->bth[1]) & cpu_to_be32(IB_FECN_SMASK);
290 }
291
292 static inline u8 ib_bth_get_tver(struct ib_other_headers *ohdr)
293 {
294 return (u8)((be32_to_cpu(ohdr->bth[0]) >> IB_BTH_TVER_SHIFT) &
295 IB_BTH_TVER_MASK);
296 }
297
298 static inline bool ib_bth_is_solicited(struct ib_other_headers *ohdr)
299 {
300 return ohdr->bth[0] & cpu_to_be32(IB_BTH_SOLICITED);
301 }
302
303 static inline bool ib_bth_is_migration(struct ib_other_headers *ohdr)
304 {
305 return ohdr->bth[0] & cpu_to_be32(IB_BTH_MIG_REQ);
306 }
307 #endif /* IB_HDRS_H */
308
Linux® is a registered trademark of Linus Torvalds in the United States and other countries.
TOMOYO® is a registered trademark of NTT DATA CORPORATION.