RDMA/cm: Add SET/GET implementations to hide IBA wire format (d05d4ac4) · Commits · 戴 / test

drivers/infiniband/core/cm.c

+267 −0

Original line number	Diff line number	Diff line
		@@ -4253,10 +4253,277 @@ static void cm_remove_one(struct ib_device ib_device, void client_data)
		kfree(cm_dev);
		}

		/*
		* Check at compile time that the byte offset and length of field old_name in
		* the struct matches the byte offset and length in the new macro.
		*/
		#define _IBA_CHECK_OFF(old_name, field_struct, field_offset, mask, bits) \
		static_assert(offsetof(field_struct, old_name) == (field_offset)); \
		static_assert(bits == sizeof(((field_struct )0)->old_name) 8)
		#define IBA_CHECK_OFF(field, old_name) _IBA_CHECK_OFF(old_name, field)

		IBA_CHECK_OFF(CM_REQ_LOCAL_COMM_ID, local_comm_id);
		IBA_CHECK_OFF(CM_REQ_SERVICE_ID, service_id);
		IBA_CHECK_OFF(CM_REQ_LOCAL_CA_GUID, local_ca_guid);
		IBA_CHECK_OFF(CM_REQ_LOCAL_Q_KEY, local_qkey);
		IBA_CHECK_OFF(CM_REQ_PARTITION_KEY, pkey);
		IBA_CHECK_OFF(CM_REQ_PRIMARY_LOCAL_PORT_LID, primary_local_lid);
		IBA_CHECK_OFF(CM_REQ_PRIMARY_REMOTE_PORT_LID, primary_remote_lid);
		IBA_CHECK_OFF(CM_REQ_PRIMARY_LOCAL_PORT_GID, primary_local_gid);
		IBA_CHECK_OFF(CM_REQ_PRIMARY_REMOTE_PORT_GID, primary_remote_gid);
		IBA_CHECK_OFF(CM_REQ_PRIMARY_TRAFFIC_CLASS, primary_traffic_class);
		IBA_CHECK_OFF(CM_REQ_PRIMARY_HOP_LIMIT, primary_hop_limit);
		IBA_CHECK_OFF(CM_REQ_ALTERNATE_LOCAL_PORT_LID, alt_local_lid);
		IBA_CHECK_OFF(CM_REQ_ALTERNATE_REMOTE_PORT_LID, alt_remote_lid);
		IBA_CHECK_OFF(CM_REQ_ALTERNATE_LOCAL_PORT_GID, alt_local_gid);
		IBA_CHECK_OFF(CM_REQ_ALTERNATE_REMOTE_PORT_GID, alt_remote_gid);
		IBA_CHECK_OFF(CM_REQ_ALTERNATE_TRAFFIC_CLASS, alt_traffic_class);
		IBA_CHECK_OFF(CM_REQ_ALTERNATE_HOP_LIMIT, alt_hop_limit);
		IBA_CHECK_OFF(CM_REQ_PRIVATE_DATA, private_data);
		IBA_CHECK_OFF(CM_MRA_LOCAL_COMM_ID, local_comm_id);
		IBA_CHECK_OFF(CM_MRA_REMOTE_COMM_ID, remote_comm_id);
		IBA_CHECK_OFF(CM_MRA_PRIVATE_DATA, private_data);
		IBA_CHECK_OFF(CM_REJ_LOCAL_COMM_ID, local_comm_id);
		IBA_CHECK_OFF(CM_REJ_REMOTE_COMM_ID, remote_comm_id);
		IBA_CHECK_OFF(CM_REJ_REASON, reason);
		IBA_CHECK_OFF(CM_REJ_ARI, ari);
		IBA_CHECK_OFF(CM_REJ_PRIVATE_DATA, private_data);
		IBA_CHECK_OFF(CM_REP_LOCAL_COMM_ID, local_comm_id);
		IBA_CHECK_OFF(CM_REP_REMOTE_COMM_ID, remote_comm_id);
		IBA_CHECK_OFF(CM_REP_LOCAL_Q_KEY, local_qkey);
		IBA_CHECK_OFF(CM_REP_RESPONDER_RESOURCES, resp_resources);
		IBA_CHECK_OFF(CM_REP_INITIATOR_DEPTH, initiator_depth);
		IBA_CHECK_OFF(CM_REP_LOCAL_CA_GUID, local_ca_guid);
		IBA_CHECK_OFF(CM_REP_PRIVATE_DATA, private_data);
		IBA_CHECK_OFF(CM_RTU_LOCAL_COMM_ID, local_comm_id);
		IBA_CHECK_OFF(CM_RTU_REMOTE_COMM_ID, remote_comm_id);
		IBA_CHECK_OFF(CM_RTU_PRIVATE_DATA, private_data);
		IBA_CHECK_OFF(CM_DREQ_LOCAL_COMM_ID, local_comm_id);
		IBA_CHECK_OFF(CM_DREQ_REMOTE_COMM_ID, remote_comm_id);
		IBA_CHECK_OFF(CM_DREQ_PRIVATE_DATA, private_data);
		IBA_CHECK_OFF(CM_DREP_LOCAL_COMM_ID, local_comm_id);
		IBA_CHECK_OFF(CM_DREP_REMOTE_COMM_ID, remote_comm_id);
		IBA_CHECK_OFF(CM_DREP_PRIVATE_DATA, private_data);
		IBA_CHECK_OFF(CM_LAP_LOCAL_COMM_ID, local_comm_id);
		IBA_CHECK_OFF(CM_LAP_REMOTE_COMM_ID, remote_comm_id);
		IBA_CHECK_OFF(CM_LAP_ALTERNATE_LOCAL_PORT_LID, alt_local_lid);
		IBA_CHECK_OFF(CM_LAP_ALTERNATE_REMOTE_PORT_LID, alt_remote_lid);
		IBA_CHECK_OFF(CM_LAP_ALTERNATE_LOCAL_PORT_GID, alt_local_gid);
		IBA_CHECK_OFF(CM_LAP_ALTERNATE_REMOTE_PORT_GID, alt_remote_gid);
		IBA_CHECK_OFF(CM_LAP_ALTERNATE_HOP_LIMIT, alt_hop_limit);
		IBA_CHECK_OFF(CM_LAP_PRIVATE_DATA, private_data);
		IBA_CHECK_OFF(CM_APR_LOCAL_COMM_ID, local_comm_id);
		IBA_CHECK_OFF(CM_APR_REMOTE_COMM_ID, remote_comm_id);
		IBA_CHECK_OFF(CM_APR_ADDITIONAL_INFORMATION_LENGTH, info_length);
		IBA_CHECK_OFF(CM_APR_AR_STATUS, ap_status);
		IBA_CHECK_OFF(CM_APR_ADDITIONAL_INFORMATION, info);
		IBA_CHECK_OFF(CM_APR_PRIVATE_DATA, private_data);
		IBA_CHECK_OFF(CM_SIDR_REQ_REQUESTID, request_id);
		IBA_CHECK_OFF(CM_SIDR_REQ_PARTITION_KEY, pkey);
		IBA_CHECK_OFF(CM_SIDR_REQ_SERVICEID, service_id);
		IBA_CHECK_OFF(CM_SIDR_REQ_PRIVATE_DATA, private_data);
		IBA_CHECK_OFF(CM_SIDR_REP_REQUESTID, request_id);
		IBA_CHECK_OFF(CM_SIDR_REP_STATUS, status);
		IBA_CHECK_OFF(CM_SIDR_REP_ADDITIONAL_INFORMATION_LENGTH, info_length);
		IBA_CHECK_OFF(CM_SIDR_REP_SERVICEID, service_id);
		IBA_CHECK_OFF(CM_SIDR_REP_Q_KEY, qkey);
		IBA_CHECK_OFF(CM_SIDR_REP_ADDITIONAL_INFORMATION, info);
		IBA_CHECK_OFF(CM_SIDR_REP_PRIVATE_DATA, private_data);

		/*
		* Check that the new macro gets the same bits as the old get function.
		* - IBA_SET() IBA_GET and old get_fn all agree on the field width.
		* The field width should match what IBA_SET truncates to
		* - Reading from an all ones data should not return extra bits
		* - Setting '1' should be the same (ie no endian problems)
		*/
		/* defeat builtin_constant checks */
		u64 cm_global_all_ones = 0xffffffffffffffffULL;
		#define _IBA_CHECK_GET(fn, field_struct, field_offset, mask, bits) \
		({ \
		field_struct lmsg = (field_struct )msg; \
		unsigned long long all_ones; \
		static_assert(sizeof(*lmsg) <= sizeof(msg)); \
		\
		bitmap_zero(msg, nbits); \
		_IBA_SET(field_struct, field_offset, mask, bits, lmsg, \
		cm_global_all_ones); \
		all_ones = (1ULL << bitmap_weight(msg, nbits)) - 1; \
		if (_IBA_GET(field_struct, field_offset, mask, bits, lmsg) != \
		all_ones) { \
		printk("Failed #1 line=%u\n", __LINE__); \
		return; \
		} \
		if (fn != all_ones) { \
		printk("Failed #2 line=%u\n", __LINE__); \
		return; \
		} \
		\
		bitmap_fill(msg, nbits); \
		if (_IBA_GET(field_struct, field_offset, mask, bits, lmsg) != \
		all_ones) { \
		printk("Failed #3 line=%u\n", __LINE__); \
		return; \
		} \
		if (fn != all_ones) { \
		printk("Failed #4 line=%u\n", __LINE__); \
		return; \
		} \
		\
		_IBA_SET(field_struct, field_offset, mask, bits, lmsg, 0); \
		if (_IBA_GET(field_struct, field_offset, mask, bits, lmsg) != \
		0) { \
		printk("Failed #5 line=%u\n", __LINE__); \
		return; \
		} \
		if (fn != 0) { \
		printk("Failed #6 line=%u\n", __LINE__); \
		return; \
		} \
		_IBA_SET(field_struct, field_offset, mask, bits, lmsg, 1); \
		if (_IBA_GET(field_struct, field_offset, mask, bits, lmsg) != \
		1) { \
		printk("Failed #7 line=%u\n", __LINE__); \
		return; \
		} \
		if (fn != 1) { \
		printk("Failed #8 line=%u\n", __LINE__); \
		return; \
		} \
		})
		#define IBA_CHECK_GET(field, fn_name) _IBA_CHECK_GET(fn_name(lmsg), field)
		#define IBA_CHECK_GET_BE(field, fn_name) _IBA_CHECK_GET(be32_to_cpu(fn_name(lmsg)), field)

		/*
		* Write the all ones value using the old setter and check that the new getter
		* reads it back.
		*/
		#define _IBA_CHECK_SET(fn, field_struct, field_offset, mask, bits) \
		({ \
		field_struct lmsg = (field_struct )msg; \
		unsigned long long all_ones; \
		static_assert(sizeof(*lmsg) <= sizeof(msg)); \
		\
		bitmap_zero(msg, nbits); \
		_IBA_SET(field_struct, field_offset, mask, bits, lmsg, \
		cm_global_all_ones); \
		all_ones = (1ULL << bitmap_weight(msg, nbits)) - 1; \
		bitmap_zero(msg, nbits); \
		fn; \
		if (_IBA_GET(field_struct, field_offset, mask, bits, lmsg) != \
		all_ones) { \
		printk("Failed #9 line=%u\n", __LINE__); \
		return; \
		} \
		all_ones = 1; \
		fn; \
		if (_IBA_GET(field_struct, field_offset, mask, bits, lmsg) != \
		1) { \
		printk("Failed #10 line=%u\n", __LINE__); \
		return; \
		} \
		})

		#define IBA_CHECK_SET(field, fn_name) _IBA_CHECK_SET(fn_name(lmsg, all_ones), field)
		#define IBA_CHECK_SET_BE(field, fn_name) \
		_IBA_CHECK_SET(fn_name(lmsg, cpu_to_be32(all_ones)), field)

		static void self_test(void)
		{
		unsigned long msg[256/4];
		const unsigned int nbits = sizeof(msg) * 8;

		printk("Running CM extractor self test\n");
		IBA_CHECK_GET_BE(CM_REQ_LOCAL_QPN, cm_req_get_local_qpn);
		IBA_CHECK_SET_BE(CM_REQ_LOCAL_QPN, cm_req_set_local_qpn);
		IBA_CHECK_GET(CM_REQ_RESPONDER_RESOURCES, cm_req_get_resp_res);
		IBA_CHECK_SET(CM_REQ_RESPONDER_RESOURCES, cm_req_set_resp_res);
		IBA_CHECK_GET(CM_REQ_INITIATOR_DEPTH, cm_req_get_init_depth);
		IBA_CHECK_SET(CM_REQ_INITIATOR_DEPTH, cm_req_set_init_depth);
		IBA_CHECK_GET(CM_REQ_REMOTE_CM_RESPONSE_TIMEOUT, cm_req_get_remote_resp_timeout);
		IBA_CHECK_SET(CM_REQ_REMOTE_CM_RESPONSE_TIMEOUT, cm_req_set_remote_resp_timeout);
		IBA_CHECK_GET(CM_REQ_TRANSPORT_SERVICE_TYPE, cm_req_get_transport_type);
		IBA_CHECK_SET(CM_REQ_TRANSPORT_SERVICE_TYPE, cm_req_set_transport_type);
		IBA_CHECK_GET(CM_REQ_END_TO_END_FLOW_CONTROL, cm_req_get_flow_ctrl);
		IBA_CHECK_SET(CM_REQ_END_TO_END_FLOW_CONTROL, cm_req_set_flow_ctrl);
		IBA_CHECK_GET_BE(CM_REQ_STARTING_PSN, cm_req_get_starting_psn);
		IBA_CHECK_SET_BE(CM_REQ_STARTING_PSN, cm_req_set_starting_psn);
		IBA_CHECK_GET(CM_REQ_LOCAL_CM_RESPONSE_TIMEOUT, cm_req_get_local_resp_timeout);
		IBA_CHECK_SET(CM_REQ_LOCAL_CM_RESPONSE_TIMEOUT, cm_req_set_local_resp_timeout);
		IBA_CHECK_GET(CM_REQ_RETRY_COUNT, cm_req_get_retry_count);
		IBA_CHECK_SET(CM_REQ_RETRY_COUNT, cm_req_set_retry_count);
		IBA_CHECK_GET(CM_REQ_PATH_PACKET_PAYLOAD_MTU, cm_req_get_path_mtu);
		IBA_CHECK_SET(CM_REQ_PATH_PACKET_PAYLOAD_MTU, cm_req_set_path_mtu);
		IBA_CHECK_GET(CM_REQ_RNR_RETRY_COUNT, cm_req_get_rnr_retry_count);
		IBA_CHECK_SET(CM_REQ_RNR_RETRY_COUNT, cm_req_set_rnr_retry_count);
		IBA_CHECK_GET(CM_REQ_MAX_CM_RETRIES, cm_req_get_max_cm_retries);
		IBA_CHECK_SET(CM_REQ_MAX_CM_RETRIES, cm_req_set_max_cm_retries);
		IBA_CHECK_GET(CM_REQ_SRQ, cm_req_get_srq);
		IBA_CHECK_SET(CM_REQ_SRQ, cm_req_set_srq);
		IBA_CHECK_GET(CM_REQ_EXTENDED_TRANSPORT_TYPE, cm_req_get_transport_type_ex);
		IBA_CHECK_SET(CM_REQ_EXTENDED_TRANSPORT_TYPE, cm_req_set_transport_type_ex);
		IBA_CHECK_GET_BE(CM_REQ_PRIMARY_FLOW_LABEL, cm_req_get_primary_flow_label);
		IBA_CHECK_SET_BE(CM_REQ_PRIMARY_FLOW_LABEL, cm_req_set_primary_flow_label);
		IBA_CHECK_GET(CM_REQ_PRIMARY_PACKET_RATE, cm_req_get_primary_packet_rate);
		IBA_CHECK_SET(CM_REQ_PRIMARY_PACKET_RATE, cm_req_set_primary_packet_rate);
		IBA_CHECK_GET(CM_REQ_PRIMARY_SL, cm_req_get_primary_sl);
		IBA_CHECK_SET(CM_REQ_PRIMARY_SL, cm_req_set_primary_sl);
		IBA_CHECK_GET(CM_REQ_PRIMARY_SUBNET_LOCAL, cm_req_get_primary_subnet_local);
		IBA_CHECK_SET(CM_REQ_PRIMARY_SUBNET_LOCAL, cm_req_set_primary_subnet_local);
		IBA_CHECK_GET(CM_REQ_PRIMARY_LOCAL_ACK_TIMEOUT, cm_req_get_primary_local_ack_timeout);
		IBA_CHECK_SET(CM_REQ_PRIMARY_LOCAL_ACK_TIMEOUT, cm_req_set_primary_local_ack_timeout);
		IBA_CHECK_GET_BE(CM_REQ_ALTERNATE_FLOW_LABEL, cm_req_get_alt_flow_label);
		IBA_CHECK_SET_BE(CM_REQ_ALTERNATE_FLOW_LABEL, cm_req_set_alt_flow_label);
		IBA_CHECK_GET(CM_REQ_ALTERNATE_PACKET_RATE, cm_req_get_alt_packet_rate);
		IBA_CHECK_SET(CM_REQ_ALTERNATE_PACKET_RATE, cm_req_set_alt_packet_rate);
		IBA_CHECK_GET(CM_REQ_ALTERNATE_SL, cm_req_get_alt_sl);
		IBA_CHECK_SET(CM_REQ_ALTERNATE_SL, cm_req_set_alt_sl);
		IBA_CHECK_GET(CM_REQ_ALTERNATE_SUBNET_LOCAL, cm_req_get_alt_subnet_local);
		IBA_CHECK_SET(CM_REQ_ALTERNATE_SUBNET_LOCAL, cm_req_set_alt_subnet_local);
		IBA_CHECK_GET(CM_REQ_ALTERNATE_LOCAL_ACK_TIMEOUT, cm_req_get_alt_local_ack_timeout);
		IBA_CHECK_SET(CM_REQ_ALTERNATE_LOCAL_ACK_TIMEOUT, cm_req_set_alt_local_ack_timeout);
		IBA_CHECK_GET(CM_MRA_MESSAGE_MRAED, cm_mra_get_msg_mraed);
		IBA_CHECK_SET(CM_MRA_MESSAGE_MRAED, cm_mra_set_msg_mraed);
		IBA_CHECK_GET(CM_MRA_SERVICE_TIMEOUT, cm_mra_get_service_timeout);
		IBA_CHECK_SET(CM_MRA_SERVICE_TIMEOUT, cm_mra_set_service_timeout);
		IBA_CHECK_GET(CM_REJ_MESSAGE_REJECTED, cm_rej_get_msg_rejected);
		IBA_CHECK_SET(CM_REJ_MESSAGE_REJECTED, cm_rej_set_msg_rejected);
		IBA_CHECK_GET(CM_REJ_REJECTED_INFO_LENGTH, cm_rej_get_reject_info_len);
		IBA_CHECK_SET(CM_REJ_REJECTED_INFO_LENGTH, cm_rej_set_reject_info_len);
		IBA_CHECK_GET_BE(CM_REP_LOCAL_QPN, cm_rep_get_local_qpn);
		IBA_CHECK_SET_BE(CM_REP_LOCAL_QPN, cm_rep_set_local_qpn);
		IBA_CHECK_GET_BE(CM_REP_LOCAL_EE_CONTEXT_NUMBER, cm_rep_get_local_eecn);
		IBA_CHECK_SET_BE(CM_REP_LOCAL_EE_CONTEXT_NUMBER, cm_rep_set_local_eecn);
		IBA_CHECK_GET_BE(CM_REP_STARTING_PSN, cm_rep_get_starting_psn);
		IBA_CHECK_SET_BE(CM_REP_STARTING_PSN, cm_rep_set_starting_psn);
		IBA_CHECK_GET(CM_REP_TARGET_ACK_DELAY, cm_rep_get_target_ack_delay);
		IBA_CHECK_SET(CM_REP_TARGET_ACK_DELAY, cm_rep_set_target_ack_delay);
		IBA_CHECK_GET(CM_REP_FAILOVER_ACCEPTED, cm_rep_get_failover);
		IBA_CHECK_SET(CM_REP_FAILOVER_ACCEPTED, cm_rep_set_failover);
		IBA_CHECK_GET(CM_REP_END_TO_END_FLOW_CONTROL, cm_rep_get_flow_ctrl);
		IBA_CHECK_SET(CM_REP_END_TO_END_FLOW_CONTROL, cm_rep_set_flow_ctrl);
		IBA_CHECK_GET(CM_REP_RNR_RETRY_COUNT, cm_rep_get_rnr_retry_count);
		IBA_CHECK_SET(CM_REP_RNR_RETRY_COUNT, cm_rep_set_rnr_retry_count);
		IBA_CHECK_GET(CM_REP_SRQ, cm_rep_get_srq);
		IBA_CHECK_SET(CM_REP_SRQ, cm_rep_set_srq);
		IBA_CHECK_GET_BE(CM_DREQ_REMOTE_QPN_EECN, cm_dreq_get_remote_qpn);
		IBA_CHECK_SET_BE(CM_DREQ_REMOTE_QPN_EECN, cm_dreq_set_remote_qpn);
		IBA_CHECK_GET_BE(CM_LAP_ALTERNATE_FLOW_LABEL, cm_lap_get_flow_label);
		IBA_CHECK_GET(CM_LAP_ALTERNATE_TRAFFIC_CLASS, cm_lap_get_traffic_class);
		IBA_CHECK_GET(CM_LAP_ALTERNATE_PACKET_RATE, cm_lap_get_packet_rate);
		IBA_CHECK_GET(CM_LAP_ALTERNATE_SL, cm_lap_get_sl);
		IBA_CHECK_GET(CM_LAP_ALTERNATE_LOCAL_ACK_TIMEOUT, cm_lap_get_local_ack_timeout);
		IBA_CHECK_GET_BE(CM_SIDR_REP_QPN, cm_sidr_rep_get_qpn);
		IBA_CHECK_SET_BE(CM_SIDR_REP_QPN, cm_sidr_rep_set_qpn);
		printk("Success!\n");
		}

		static int __init ib_cm_init(void)
		{
		int ret;

		self_test();

		INIT_LIST_HEAD(&cm.device_list);
		rwlock_init(&cm.device_lock);
		spin_lock_init(&cm.lock);

drivers/infiniband/core/cm_msgs.h

+1 −0

Original line number	Diff line number	Diff line
		@@ -8,6 +8,7 @@
		#ifndef CM_MSGS_H
		#define CM_MSGS_H

		#include <rdma/ibta_vol1_c12.h>
		#include <rdma/ib_mad.h>
		#include <rdma/ib_cm.h>

include/rdma/iba.h

0 → 100644

+146 −0

Original line number	Diff line number	Diff line
		/* SPDX-License-Identifier: GPL-2.0 OR Linux-OpenIB */
		/*
		* Copyright (c) 2020, Mellanox Technologies inc. All rights reserved.
		*/
		#ifndef _IBA_DEFS_H_
		#define _IBA_DEFS_H_

		#include <linux/kernel.h>
		#include <linux/bitfield.h>
		#include <asm/unaligned.h>

		static inline u32 _iba_get8(const u8 *ptr)
		{
		return *ptr;
		}

		static inline void _iba_set8(u8 *ptr, u32 mask, u32 prep_value)
		{
		ptr = (ptr & ~mask) \| prep_value;
		}

		static inline u16 _iba_get16(const __be16 *ptr)
		{
		return be16_to_cpu(*ptr);
		}

		static inline void _iba_set16(__be16 *ptr, u16 mask, u16 prep_value)
		{
		ptr = cpu_to_be16((be16_to_cpu(ptr) & ~mask) \| prep_value);
		}

		static inline u32 _iba_get32(const __be32 *ptr)
		{
		return be32_to_cpu(*ptr);
		}

		static inline void _iba_set32(__be32 *ptr, u32 mask, u32 prep_value)
		{
		ptr = cpu_to_be32((be32_to_cpu(ptr) & ~mask) \| prep_value);
		}

		static inline u64 _iba_get64(const __be64 *ptr)
		{
		/*
		* The mads are constructed so that 32 bit and smaller are naturally
		* aligned, everything larger has a max alignment of 4 bytes.
		*/
		return be64_to_cpu(get_unaligned(ptr));
		}

		static inline void _iba_set64(__be64 *ptr, u64 mask, u64 prep_value)
		{
		put_unaligned(cpu_to_be64((_iba_get64(ptr) & ~mask) \| prep_value), ptr);
		}

		#define _IBA_SET(field_struct, field_offset, field_mask, num_bits, ptr, value) \
		({ \
		field_struct *_ptr = ptr; \
		_iba_set##num_bits((void *)_ptr + (field_offset), field_mask, \
		FIELD_PREP(field_mask, value)); \
		})
		#define IBA_SET(field, ptr, value) _IBA_SET(field, ptr, value)

		#define _IBA_GET_MEM_PTR(field_struct, field_offset, type, num_bits, ptr) \
		({ \
		field_struct *_ptr = ptr; \
		(type )((void )_ptr + (field_offset)); \
		})
		#define IBA_GET_MEM_PTR(field, ptr) _IBA_GET_MEM_PTR(field, ptr)

		/* FIXME: A set should always set the entire field, meaning we should zero the trailing bytes */
		#define _IBA_SET_MEM(field_struct, field_offset, type, num_bits, ptr, in, \
		bytes) \
		({ \
		const type *_in_ptr = in; \
		WARN_ON(bytes * 8 > num_bits); \
		if (in && bytes) \
		memcpy(_IBA_GET_MEM_PTR(field_struct, field_offset, \
		type, num_bits, ptr), \
		_in_ptr, bytes); \
		})
		#define IBA_SET_MEM(field, ptr, in, bytes) _IBA_SET_MEM(field, ptr, in, bytes)

		#define _IBA_GET(field_struct, field_offset, field_mask, num_bits, ptr) \
		({ \
		const field_struct *_ptr = ptr; \
		(u##num_bits) FIELD_GET( \
		field_mask, _iba_get##num_bits((const void *)_ptr + \
		(field_offset))); \
		})
		#define IBA_GET(field, ptr) _IBA_GET(field, ptr)

		#define _IBA_GET_MEM(field_struct, field_offset, type, num_bits, ptr, out, \
		bytes) \
		({ \
		type *_out_ptr = out; \
		WARN_ON(bytes * 8 > num_bits); \
		if (out && bytes) \
		memcpy(_out_ptr, \
		_IBA_GET_MEM_PTR(field_struct, field_offset, \
		type, num_bits, ptr), \
		bytes); \
		})
		#define IBA_GET_MEM(field, ptr, out, bytes) _IBA_GET_MEM(field, ptr, out, bytes)

		/*
		* The generated list becomes the parameters to the macros, the order is:
		* - struct this applies to
		* - starting offset of the max
		* - GENMASK or GENMASK_ULL in CPU order
		* - The width of data the mask operations should work on, in bits
		*/

		/*
		* Extraction using a tabular description like table 106. bit_offset is from
		* the Byte[Bit] notation.
		*/
		#define IBA_FIELD_BLOC(field_struct, byte_offset, bit_offset, num_bits) \
		field_struct, byte_offset, \
		GENMASK(7 - (bit_offset), 7 - (bit_offset) - (num_bits - 1)), \
		8
		#define IBA_FIELD8_LOC(field_struct, byte_offset, num_bits) \
		IBA_FIELD_BLOC(field_struct, byte_offset, 0, num_bits)

		#define IBA_FIELD16_LOC(field_struct, byte_offset, num_bits) \
		field_struct, (byte_offset)&0xFFFE, \
		GENMASK(15 - (((byte_offset) % 2) * 8), \
		15 - (((byte_offset) % 2) * 8) - (num_bits - 1)), \
		16

		#define IBA_FIELD32_LOC(field_struct, byte_offset, num_bits) \
		field_struct, (byte_offset)&0xFFFC, \
		GENMASK(31 - (((byte_offset) % 4) * 8), \
		31 - (((byte_offset) % 4) * 8) - (num_bits - 1)), \
		32

		#define IBA_FIELD64_LOC(field_struct, byte_offset) \
		field_struct, byte_offset, GENMASK_ULL(63, 0), 64
		/*
		* In IBTA spec, everything that is more than 64bits is multiple
		* of bytes without leftover bits.
		*/
		#define IBA_FIELD_MLOC(field_struct, byte_offset, num_bits, type) \
		field_struct, byte_offset, type, num_bits

		#endif /* _IBA_DEFS_H_ */

include/rdma/ibta_vol1_c12.h

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