include/rdma/ib_hdrs.h - linux - Git at Google

 /* 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 <asm/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 */
	/* 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 <asm/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 */