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/* SPDX-License-Identifier: GPL-2.0 OR BSD-3-Clause */
/*
* Copyright(c) 2016 - 2018 Intel Corporation.
*/
#ifndef IB_HDRS_H
#define IB_HDRS_H
#include <linux/types.h>
#include <linux/unaligned.h>
#include <rdma/ib_verbs.h>
#define IB_SEQ_NAK (3 << 29)
/* AETH NAK opcode values */
#define IB_RNR_NAK 0x20
#define IB_NAK_PSN_ERROR 0x60
#define IB_NAK_INVALID_REQUEST 0x61
#define IB_NAK_REMOTE_ACCESS_ERROR 0x62
#define IB_NAK_REMOTE_OPERATIONAL_ERROR 0x63
#define IB_NAK_INVALID_RD_REQUEST 0x64
#define IB_BTH_REQ_ACK BIT(31)
#define IB_BTH_SOLICITED BIT(23)
#define IB_BTH_MIG_REQ BIT(22)
#define IB_GRH_VERSION 6
#define IB_GRH_VERSION_MASK 0xF
#define IB_GRH_VERSION_SHIFT 28
#define IB_GRH_TCLASS_MASK 0xFF
#define IB_GRH_TCLASS_SHIFT 20
#define IB_GRH_FLOW_MASK 0xFFFFF
#define IB_GRH_FLOW_SHIFT 0
#define IB_GRH_NEXT_HDR 0x1B
#define IB_FECN_SHIFT 31
#define IB_FECN_MASK 1
#define IB_FECN_SMASK BIT(IB_FECN_SHIFT)
#define IB_BECN_SHIFT 30
#define IB_BECN_MASK 1
#define IB_BECN_SMASK BIT(IB_BECN_SHIFT)
#define IB_AETH_CREDIT_SHIFT 24
#define IB_AETH_CREDIT_MASK 0x1F
#define IB_AETH_CREDIT_INVAL 0x1F
#define IB_AETH_NAK_SHIFT 29
#define IB_MSN_MASK 0xFFFFFF
struct ib_reth {
__be64 vaddr; /* potentially unaligned */
__be32 rkey;
__be32 length;
} __packed;
struct ib_atomic_eth {
__be64 vaddr; /* potentially unaligned */
__be32 rkey;
__be64 swap_data; /* potentially unaligned */
__be64 compare_data; /* potentially unaligned */
} __packed;
#include <rdma/tid_rdma_defs.h>
union ib_ehdrs {
struct {
__be32 deth[2];
__be32 imm_data;
} ud;
struct {
struct ib_reth reth;
__be32 imm_data;
} rc;
struct {
__be32 aeth;
__be64 atomic_ack_eth; /* potentially unaligned */
} __packed at;
__be32 imm_data;
__be32 aeth;
__be32 ieth;
struct ib_atomic_eth atomic_eth;
/* TID RDMA headers */
union {
struct tid_rdma_read_req r_req;
struct tid_rdma_read_resp r_rsp;
struct tid_rdma_write_req w_req;
struct tid_rdma_write_resp w_rsp;
struct tid_rdma_write_data w_data;
struct tid_rdma_resync resync;
struct tid_rdma_ack ack;
} tid_rdma;
} __packed;
struct ib_other_headers {
__be32 bth[3];
union ib_ehdrs u;
} __packed;
struct ib_header {
__be16 lrh[4];
union {
struct {
struct ib_grh grh;
struct ib_other_headers oth;
} l;
struct ib_other_headers oth;
} u;
} __packed;
/* accessors for unaligned __be64 items */
static inline u64 ib_u64_get(__be64 *p)
{
return get_unaligned_be64(p);
}
static inline void ib_u64_put(u64 val, __be64 *p)
{
put_unaligned_be64(val, p);
}
static inline u64 get_ib_reth_vaddr(struct ib_reth *reth)
{
return ib_u64_get(&reth->vaddr);
}
static inline void put_ib_reth_vaddr(u64 val, struct ib_reth *reth)
{
ib_u64_put(val, &reth->vaddr);
}
static inline u64 get_ib_ateth_vaddr(struct ib_atomic_eth *ateth)
{
return ib_u64_get(&ateth->vaddr);
}
static inline void put_ib_ateth_vaddr(u64 val, struct ib_atomic_eth *ateth)
{
ib_u64_put(val, &ateth->vaddr);
}
static inline u64 get_ib_ateth_swap(struct ib_atomic_eth *ateth)
{
return ib_u64_get(&ateth->swap_data);
}
static inline void put_ib_ateth_swap(u64 val, struct ib_atomic_eth *ateth)
{
ib_u64_put(val, &ateth->swap_data);
}
static inline u64 get_ib_ateth_compare(struct ib_atomic_eth *ateth)
{
return ib_u64_get(&ateth->compare_data);
}
static inline void put_ib_ateth_compare(u64 val, struct ib_atomic_eth *ateth)
{
ib_u64_put(val, &ateth->compare_data);
}
/*
* 9B/IB Packet Format
*/
#define IB_LNH_MASK 3
#define IB_SC_MASK 0xf
#define IB_SC_SHIFT 12
#define IB_SC5_MASK 0x10
#define IB_SL_MASK 0xf
#define IB_SL_SHIFT 4
#define IB_SL_SHIFT 4
#define IB_LVER_MASK 0xf
#define IB_LVER_SHIFT 8
static inline u8 ib_get_lnh(struct ib_header *hdr)
{
return (be16_to_cpu(hdr->lrh[0]) & IB_LNH_MASK);
}
static inline u8 ib_get_sc(struct ib_header *hdr)
{
return ((be16_to_cpu(hdr->lrh[0]) >> IB_SC_SHIFT) & IB_SC_MASK);
}
static inline bool ib_is_sc5(u16 sc5)
{
return !!(sc5 & IB_SC5_MASK);
}
static inline u8 ib_get_sl(struct ib_header *hdr)
{
return ((be16_to_cpu(hdr->lrh[0]) >> IB_SL_SHIFT) & IB_SL_MASK);
}
static inline u16 ib_get_dlid(struct ib_header *hdr)
{
return (be16_to_cpu(hdr->lrh[1]));
}
static inline u16 ib_get_slid(struct ib_header *hdr)
{
return (be16_to_cpu(hdr->lrh[3]));
}
static inline u8 ib_get_lver(struct ib_header *hdr)
{
return (u8)((be16_to_cpu(hdr->lrh[0]) >> IB_LVER_SHIFT) &
IB_LVER_MASK);
}
static inline u32 ib_get_qkey(struct ib_other_headers *ohdr)
{
return be32_to_cpu(ohdr->u.ud.deth[0]);
}
static inline u32 ib_get_sqpn(struct ib_other_headers *ohdr)
{
return ((be32_to_cpu(ohdr->u.ud.deth[1])) & IB_QPN_MASK);
}
/*
* BTH
*/
#define IB_BTH_OPCODE_MASK 0xff
#define IB_BTH_OPCODE_SHIFT 24
#define IB_BTH_PAD_MASK 3
#define IB_BTH_PKEY_MASK 0xffff
#define IB_BTH_PAD_SHIFT 20
#define IB_BTH_A_MASK 1
#define IB_BTH_A_SHIFT 31
#define IB_BTH_M_MASK 1
#define IB_BTH_M_SHIFT 22
#define IB_BTH_SE_MASK 1
#define IB_BTH_SE_SHIFT 23
#define IB_BTH_TVER_MASK 0xf
#define IB_BTH_TVER_SHIFT 16
#define IB_BTH_OPCODE_CNP 0x81
static inline u8 ib_bth_get_pad(struct ib_other_headers *ohdr)
{
return ((be32_to_cpu(ohdr->bth[0]) >> IB_BTH_PAD_SHIFT) &
IB_BTH_PAD_MASK);
}
static inline u16 ib_bth_get_pkey(struct ib_other_headers *ohdr)
{
return (be32_to_cpu(ohdr->bth[0]) & IB_BTH_PKEY_MASK);
}
static inline u8 ib_bth_get_opcode(struct ib_other_headers *ohdr)
{
return ((be32_to_cpu(ohdr->bth[0]) >> IB_BTH_OPCODE_SHIFT) &
IB_BTH_OPCODE_MASK);
}
static inline u8 ib_bth_get_ackreq(struct ib_other_headers *ohdr)
{
return (u8)((be32_to_cpu(ohdr->bth[2]) >> IB_BTH_A_SHIFT) &
IB_BTH_A_MASK);
}
static inline u8 ib_bth_get_migreq(struct ib_other_headers *ohdr)
{
return (u8)((be32_to_cpu(ohdr->bth[0]) >> IB_BTH_M_SHIFT) &
IB_BTH_M_MASK);
}
static inline u8 ib_bth_get_se(struct ib_other_headers *ohdr)
{
return (u8)((be32_to_cpu(ohdr->bth[0]) >> IB_BTH_SE_SHIFT) &
IB_BTH_SE_MASK);
}
static inline u32 ib_bth_get_psn(struct ib_other_headers *ohdr)
{
return (u32)(be32_to_cpu(ohdr->bth[2]));
}
static inline u32 ib_bth_get_qpn(struct ib_other_headers *ohdr)
{
return (u32)((be32_to_cpu(ohdr->bth[1])) & IB_QPN_MASK);
}
static inline bool ib_bth_get_becn(struct ib_other_headers *ohdr)
{
return (ohdr->bth[1]) & cpu_to_be32(IB_BECN_SMASK);
}
static inline bool ib_bth_get_fecn(struct ib_other_headers *ohdr)
{
return (ohdr->bth[1]) & cpu_to_be32(IB_FECN_SMASK);
}
static inline u8 ib_bth_get_tver(struct ib_other_headers *ohdr)
{
return (u8)((be32_to_cpu(ohdr->bth[0]) >> IB_BTH_TVER_SHIFT) &
IB_BTH_TVER_MASK);
}
static inline bool ib_bth_is_solicited(struct ib_other_headers *ohdr)
{
return ohdr->bth[0] & cpu_to_be32(IB_BTH_SOLICITED);
}
static inline bool ib_bth_is_migration(struct ib_other_headers *ohdr)
{
return ohdr->bth[0] & cpu_to_be32(IB_BTH_MIG_REQ);
}
#endif /* IB_HDRS_H */
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