cachepc-linux

Fork of AMDESE/linux with modifications for CachePC side-channel attack
git clone https://git.sinitax.com/sinitax/cachepc-linux
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opa_addr.h (2452B)

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