include/rdma/opa_addr.h

   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  */
  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  */
  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  */
  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 */
  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 */
  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 */