xref: /linux/include/rdma/opa_addr.h (revision 4b4193256c8d3bc3a5397b5cd9494c2ad386317d)
1 /* SPDX-License-Identifier: GPL-2.0 OR BSD-3-Clause */
2 /*
3  * Copyright(c) 2017 Intel Corporation.
4  */
5 
6 #ifndef OPA_ADDR_H
7 #define OPA_ADDR_H
8 
9 #include <rdma/opa_smi.h>
10 
11 #define	OPA_SPECIAL_OUI		(0x00066AULL)
12 #define OPA_MAKE_ID(x)          (cpu_to_be64(OPA_SPECIAL_OUI << 40 | (x)))
13 #define OPA_TO_IB_UCAST_LID(x) (((x) >= be16_to_cpu(IB_MULTICAST_LID_BASE)) \
14 				? 0 : x)
15 #define OPA_GID_INDEX		0x1
16 /**
17  * 0xF8 - 4 bits of multicast range and 1 bit for collective range
18  * Example: For 24 bit LID space,
19  * Multicast range: 0xF00000 to 0xF7FFFF
20  * Collective range: 0xF80000 to 0xFFFFFE
21  */
22 #define OPA_MCAST_NR 0x4 /* Number of top bits set */
23 #define OPA_COLLECTIVE_NR 0x1 /* Number of bits after MCAST_NR */
24 
25 /**
26  * ib_is_opa_gid: Returns true if the top 24 bits of the gid
27  * contains the OPA_STL_OUI identifier. This identifies that
28  * the provided gid is a special purpose GID meant to carry
29  * extended LID information.
30  *
31  * @gid: The Global identifier
32  */
ib_is_opa_gid(const union ib_gid * gid)33 static inline bool ib_is_opa_gid(const union ib_gid *gid)
34 {
35 	return ((be64_to_cpu(gid->global.interface_id) >> 40) ==
36 		OPA_SPECIAL_OUI);
37 }
38 
39 /**
40  * opa_get_lid_from_gid: Returns the last 32 bits of the gid.
41  * OPA devices use one of the gids in the gid table to also
42  * store the lid.
43  *
44  * @gid: The Global identifier
45  */
opa_get_lid_from_gid(const union ib_gid * gid)46 static inline u32 opa_get_lid_from_gid(const union ib_gid *gid)
47 {
48 	return be64_to_cpu(gid->global.interface_id) & 0xFFFFFFFF;
49 }
50 
51 /**
52  * opa_is_extended_lid: Returns true if dlid or slid are
53  * extended.
54  *
55  * @dlid: The DLID
56  * @slid: The SLID
57  */
opa_is_extended_lid(__be32 dlid,__be32 slid)58 static inline bool opa_is_extended_lid(__be32 dlid, __be32 slid)
59 {
60 	if ((be32_to_cpu(dlid) >=
61 	     be16_to_cpu(IB_MULTICAST_LID_BASE)) ||
62 	    (be32_to_cpu(slid) >=
63 	     be16_to_cpu(IB_MULTICAST_LID_BASE)))
64 		return true;
65 
66 	return false;
67 }
68 
69 /* Get multicast lid base */
opa_get_mcast_base(u32 nr_top_bits)70 static inline u32 opa_get_mcast_base(u32 nr_top_bits)
71 {
72 	return (be32_to_cpu(OPA_LID_PERMISSIVE) << (32 - nr_top_bits));
73 }
74 
75 /* Check for a valid unicast LID for non-SM traffic types */
rdma_is_valid_unicast_lid(struct rdma_ah_attr * attr)76 static inline bool rdma_is_valid_unicast_lid(struct rdma_ah_attr *attr)
77 {
78 	if (attr->type == RDMA_AH_ATTR_TYPE_IB) {
79 		if (!rdma_ah_get_dlid(attr) ||
80 		    rdma_ah_get_dlid(attr) >=
81 		    be16_to_cpu(IB_MULTICAST_LID_BASE))
82 			return false;
83 	} else if (attr->type == RDMA_AH_ATTR_TYPE_OPA) {
84 		if (!rdma_ah_get_dlid(attr) ||
85 		    rdma_ah_get_dlid(attr) >=
86 		    opa_get_mcast_base(OPA_MCAST_NR))
87 			return false;
88 	}
89 	return true;
90 }
91 #endif /* OPA_ADDR_H */
92