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)33static 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)46static 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)58static 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)70static 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)76static 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