2 * Copyright(c) 2016 Intel Corporation.
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.
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.
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.
20 * Redistribution and use in source and binary forms, with or without
21 * modification, are permitted provided that the following conditions
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
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.
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
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40 * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
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44 * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
51 #include <linux/types.h>
52 #include <asm/unaligned.h>
53 #include <rdma/ib_verbs.h>
55 #define IB_SEQ_NAK (3 << 29)
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
65 #define IB_BTH_REQ_ACK BIT(31)
66 #define IB_BTH_SOLICITED BIT(23)
67 #define IB_BTH_MIG_REQ BIT(22)
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)
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
91 __be64 vaddr
; /* potentially unaligned */
96 struct ib_atomic_eth
{
97 __be64 vaddr
; /* potentially unaligned */
99 __be64 swap_data
; /* potentially unaligned */
100 __be64 compare_data
; /* potentially unaligned */
114 __be64 atomic_ack_eth
; /* potentially unaligned */
119 struct ib_atomic_eth atomic_eth
;
122 struct ib_other_headers
{
132 struct ib_other_headers oth
;
134 struct ib_other_headers oth
;
138 /* accessors for unaligned __be64 items */
140 static inline u64
ib_u64_get(__be64
*p
)
142 return get_unaligned_be64(p
);
145 static inline void ib_u64_put(u64 val
, __be64
*p
)
147 put_unaligned_be64(val
, p
);
150 static inline u64
get_ib_reth_vaddr(struct ib_reth
*reth
)
152 return ib_u64_get(&reth
->vaddr
);
155 static inline void put_ib_reth_vaddr(u64 val
, struct ib_reth
*reth
)
157 ib_u64_put(val
, &reth
->vaddr
);
160 static inline u64
get_ib_ateth_vaddr(struct ib_atomic_eth
*ateth
)
162 return ib_u64_get(&ateth
->vaddr
);
165 static inline void put_ib_ateth_vaddr(u64 val
, struct ib_atomic_eth
*ateth
)
167 ib_u64_put(val
, &ateth
->vaddr
);
170 static inline u64
get_ib_ateth_swap(struct ib_atomic_eth
*ateth
)
172 return ib_u64_get(&ateth
->swap_data
);
175 static inline void put_ib_ateth_swap(u64 val
, struct ib_atomic_eth
*ateth
)
177 ib_u64_put(val
, &ateth
->swap_data
);
180 static inline u64
get_ib_ateth_compare(struct ib_atomic_eth
*ateth
)
182 return ib_u64_get(&ateth
->compare_data
);
185 static inline void put_ib_ateth_compare(u64 val
, struct ib_atomic_eth
*ateth
)
187 ib_u64_put(val
, &ateth
->compare_data
);
191 * 9B/IB Packet Format
193 #define IB_LNH_MASK 3
194 #define IB_SC_MASK 0xf
195 #define IB_SC_SHIFT 12
196 #define IB_SC5_MASK 0x10
197 #define IB_SL_MASK 0xf
198 #define IB_SL_SHIFT 4
199 #define IB_SL_SHIFT 4
200 #define IB_LVER_MASK 0xf
201 #define IB_LVER_SHIFT 8
203 static inline u8
ib_get_lnh(struct ib_header
*hdr
)
205 return (be16_to_cpu(hdr
->lrh
[0]) & IB_LNH_MASK
);
208 static inline u8
ib_get_sc(struct ib_header
*hdr
)
210 return ((be16_to_cpu(hdr
->lrh
[0]) >> IB_SC_SHIFT
) & IB_SC_MASK
);
213 static inline bool ib_is_sc5(u16 sc5
)
215 return !!(sc5
& IB_SC5_MASK
);
218 static inline u8
ib_get_sl(struct ib_header
*hdr
)
220 return ((be16_to_cpu(hdr
->lrh
[0]) >> IB_SL_SHIFT
) & IB_SL_MASK
);
223 static inline u16
ib_get_dlid(struct ib_header
*hdr
)
225 return (be16_to_cpu(hdr
->lrh
[1]));
228 static inline u16
ib_get_slid(struct ib_header
*hdr
)
230 return (be16_to_cpu(hdr
->lrh
[3]));
233 static inline u8
ib_get_lver(struct ib_header
*hdr
)
235 return (u8
)((be16_to_cpu(hdr
->lrh
[0]) >> IB_LVER_SHIFT
) &
239 static inline u16
ib_get_len(struct ib_header
*hdr
)
241 return (u16
)(be16_to_cpu(hdr
->lrh
[2]));
244 static inline u32
ib_get_qkey(struct ib_other_headers
*ohdr
)
246 return be32_to_cpu(ohdr
->u
.ud
.deth
[0]);
249 static inline u32
ib_get_sqpn(struct ib_other_headers
*ohdr
)
251 return ((be32_to_cpu(ohdr
->u
.ud
.deth
[1])) & IB_QPN_MASK
);
257 #define IB_BTH_OPCODE_MASK 0xff
258 #define IB_BTH_OPCODE_SHIFT 24
259 #define IB_BTH_PAD_MASK 3
260 #define IB_BTH_PKEY_MASK 0xffff
261 #define IB_BTH_PAD_SHIFT 20
262 #define IB_BTH_A_MASK 1
263 #define IB_BTH_A_SHIFT 31
264 #define IB_BTH_M_MASK 1
265 #define IB_BTH_M_SHIFT 22
266 #define IB_BTH_SE_MASK 1
267 #define IB_BTH_SE_SHIFT 23
268 #define IB_BTH_TVER_MASK 0xf
269 #define IB_BTH_TVER_SHIFT 16
271 static inline u8
ib_bth_get_pad(struct ib_other_headers
*ohdr
)
273 return ((be32_to_cpu(ohdr
->bth
[0]) >> IB_BTH_PAD_SHIFT
) &
277 static inline u16
ib_bth_get_pkey(struct ib_other_headers
*ohdr
)
279 return (be32_to_cpu(ohdr
->bth
[0]) & IB_BTH_PKEY_MASK
);
282 static inline u8
ib_bth_get_opcode(struct ib_other_headers
*ohdr
)
284 return ((be32_to_cpu(ohdr
->bth
[0]) >> IB_BTH_OPCODE_SHIFT
) &
288 static inline u8
ib_bth_get_ackreq(struct ib_other_headers
*ohdr
)
290 return (u8
)((be32_to_cpu(ohdr
->bth
[2]) >> IB_BTH_A_SHIFT
) &
294 static inline u8
ib_bth_get_migreq(struct ib_other_headers
*ohdr
)
296 return (u8
)((be32_to_cpu(ohdr
->bth
[0]) >> IB_BTH_M_SHIFT
) &
300 static inline u8
ib_bth_get_se(struct ib_other_headers
*ohdr
)
302 return (u8
)((be32_to_cpu(ohdr
->bth
[0]) >> IB_BTH_SE_SHIFT
) &
306 static inline u32
ib_bth_get_psn(struct ib_other_headers
*ohdr
)
308 return (u32
)(be32_to_cpu(ohdr
->bth
[2]));
311 static inline u32
ib_bth_get_qpn(struct ib_other_headers
*ohdr
)
313 return (u32
)((be32_to_cpu(ohdr
->bth
[1])) & IB_QPN_MASK
);
316 static inline u8
ib_bth_get_becn(struct ib_other_headers
*ohdr
)
318 return (u8
)((be32_to_cpu(ohdr
->bth
[1]) >> IB_BECN_SHIFT
) &
322 static inline u8
ib_bth_get_fecn(struct ib_other_headers
*ohdr
)
324 return (u8
)((be32_to_cpu(ohdr
->bth
[1]) >> IB_FECN_SHIFT
) &
328 static inline u8
ib_bth_get_tver(struct ib_other_headers
*ohdr
)
330 return (u8
)((be32_to_cpu(ohdr
->bth
[0]) >> IB_BTH_TVER_SHIFT
) &
334 #endif /* IB_HDRS_H */