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91 lines
2.4 KiB
91 lines
2.4 KiB
/* SPDX-License-Identifier: GPL-2.0 OR BSD-3-Clause */ |
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/* |
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* Copyright(c) 2017 Intel Corporation. |
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*/ |
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#ifndef OPA_ADDR_H |
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#define OPA_ADDR_H |
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#include <rdma/opa_smi.h> |
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#define OPA_SPECIAL_OUI (0x00066AULL) |
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#define OPA_MAKE_ID(x) (cpu_to_be64(OPA_SPECIAL_OUI << 40 | (x))) |
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#define OPA_TO_IB_UCAST_LID(x) (((x) >= be16_to_cpu(IB_MULTICAST_LID_BASE)) \ |
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? 0 : x) |
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#define OPA_GID_INDEX 0x1 |
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/** |
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* 0xF8 - 4 bits of multicast range and 1 bit for collective range |
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* Example: For 24 bit LID space, |
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* Multicast range: 0xF00000 to 0xF7FFFF |
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* Collective range: 0xF80000 to 0xFFFFFE |
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*/ |
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#define OPA_MCAST_NR 0x4 /* Number of top bits set */ |
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#define OPA_COLLECTIVE_NR 0x1 /* Number of bits after MCAST_NR */ |
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/** |
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* ib_is_opa_gid: Returns true if the top 24 bits of the gid |
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* contains the OPA_STL_OUI identifier. This identifies that |
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* the provided gid is a special purpose GID meant to carry |
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* extended LID information. |
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* |
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* @gid: The Global identifier |
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*/ |
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static inline bool ib_is_opa_gid(const union ib_gid *gid) |
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{ |
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return ((be64_to_cpu(gid->global.interface_id) >> 40) == |
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OPA_SPECIAL_OUI); |
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} |
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/** |
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* opa_get_lid_from_gid: Returns the last 32 bits of the gid. |
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* OPA devices use one of the gids in the gid table to also |
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* store the lid. |
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* |
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* @gid: The Global identifier |
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*/ |
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static inline u32 opa_get_lid_from_gid(const union ib_gid *gid) |
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{ |
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return be64_to_cpu(gid->global.interface_id) & 0xFFFFFFFF; |
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} |
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/** |
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* opa_is_extended_lid: Returns true if dlid or slid are |
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* extended. |
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* |
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* @dlid: The DLID |
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* @slid: The SLID |
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*/ |
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static inline bool opa_is_extended_lid(__be32 dlid, __be32 slid) |
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{ |
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if ((be32_to_cpu(dlid) >= |
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be16_to_cpu(IB_MULTICAST_LID_BASE)) || |
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(be32_to_cpu(slid) >= |
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be16_to_cpu(IB_MULTICAST_LID_BASE))) |
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return true; |
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return false; |
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} |
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/* Get multicast lid base */ |
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static inline u32 opa_get_mcast_base(u32 nr_top_bits) |
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{ |
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return (be32_to_cpu(OPA_LID_PERMISSIVE) << (32 - nr_top_bits)); |
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} |
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/* Check for a valid unicast LID for non-SM traffic types */ |
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static inline bool rdma_is_valid_unicast_lid(struct rdma_ah_attr *attr) |
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{ |
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if (attr->type == RDMA_AH_ATTR_TYPE_IB) { |
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if (!rdma_ah_get_dlid(attr) || |
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rdma_ah_get_dlid(attr) >= |
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be16_to_cpu(IB_MULTICAST_LID_BASE)) |
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return false; |
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} else if (attr->type == RDMA_AH_ATTR_TYPE_OPA) { |
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if (!rdma_ah_get_dlid(attr) || |
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rdma_ah_get_dlid(attr) >= |
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opa_get_mcast_base(OPA_MCAST_NR)) |
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return false; |
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} |
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return true; |
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} |
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#endif /* OPA_ADDR_H */
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