cregit-Linux how code gets into the kernel

Release 4.7 drivers/infiniband/hw/hfi1/mad.h

/*
 * Copyright(c) 2015, 2016 Intel Corporation.
 *
 * This file is provided under a dual BSD/GPLv2 license.  When using or
 * redistributing this file, you may do so under either license.
 *
 * GPL LICENSE SUMMARY
 *
 * This program is free software; you can redistribute it and/or modify
 * it under the terms of version 2 of the GNU General Public License as
 * published by the Free Software Foundation.
 *
 * This program is distributed in the hope that it will be useful, but
 * WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
 * General Public License for more details.
 *
 * BSD LICENSE
 *
 * Redistribution and use in source and binary forms, with or without
 * modification, are permitted provided that the following conditions
 * are met:
 *
 *  - Redistributions of source code must retain the above copyright
 *    notice, this list of conditions and the following disclaimer.
 *  - Redistributions in binary form must reproduce the above copyright
 *    notice, this list of conditions and the following disclaimer in
 *    the documentation and/or other materials provided with the
 *    distribution.
 *  - Neither the name of Intel Corporation nor the names of its
 *    contributors may be used to endorse or promote products derived
 *    from this software without specific prior written permission.
 *
 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
 * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
 * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
 * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
 * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
 * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
 * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
 * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
 *
 */
#ifndef _HFI1_MAD_H

#define _HFI1_MAD_H

#include <rdma/ib_pma.h>

#define USE_PI_LED_ENABLE	1 
/*
                                   * use led enabled bit in struct
                                   * opa_port_states, if available
                                   */
#include <rdma/opa_smi.h>
#include <rdma/opa_port_info.h>
#ifndef PI_LED_ENABLE_SUP

#define PI_LED_ENABLE_SUP 0
#endif
#include "opa_compat.h"

/*
 * OPA Traps
 */

#define OPA_TRAP_GID_NOW_IN_SERVICE             cpu_to_be16(64)

#define OPA_TRAP_GID_OUT_OF_SERVICE             cpu_to_be16(65)

#define OPA_TRAP_ADD_MULTICAST_GROUP            cpu_to_be16(66)

#define OPA_TRAL_DEL_MULTICAST_GROUP            cpu_to_be16(67)

#define OPA_TRAP_UNPATH                         cpu_to_be16(68)

#define OPA_TRAP_REPATH                         cpu_to_be16(69)

#define OPA_TRAP_PORT_CHANGE_STATE              cpu_to_be16(128)

#define OPA_TRAP_LINK_INTEGRITY                 cpu_to_be16(129)

#define OPA_TRAP_EXCESSIVE_BUFFER_OVERRUN       cpu_to_be16(130)

#define OPA_TRAP_FLOW_WATCHDOG                  cpu_to_be16(131)

#define OPA_TRAP_CHANGE_CAPABILITY              cpu_to_be16(144)

#define OPA_TRAP_CHANGE_SYSGUID                 cpu_to_be16(145)

#define OPA_TRAP_BAD_M_KEY                      cpu_to_be16(256)

#define OPA_TRAP_BAD_P_KEY                      cpu_to_be16(257)

#define OPA_TRAP_BAD_Q_KEY                      cpu_to_be16(258)

#define OPA_TRAP_SWITCH_BAD_PKEY                cpu_to_be16(259)

#define OPA_SMA_TRAP_DATA_LINK_WIDTH            cpu_to_be16(2048)

/*
 * Generic trap/notice other local changes flags (trap 144).
 */

#define	OPA_NOTICE_TRAP_LWDE_CHG        0x08 
/* Link Width Downgrade Enable
                                              * changed
                                              */

#define OPA_NOTICE_TRAP_LSE_CHG         0x04 
/* Link Speed Enable changed */

#define OPA_NOTICE_TRAP_LWE_CHG         0x02 
/* Link Width Enable changed */

#define OPA_NOTICE_TRAP_NODE_DESC_CHG   0x01


struct opa_mad_notice_attr {
	
u8 generic_type;
	
u8 prod_type_msb;
	
__be16 prod_type_lsb;
	
__be16 trap_num;
	
__be16 toggle_count;
	
__be32 issuer_lid;
	
__be32 reserved1;
	
union ib_gid issuer_gid;

	union {
		struct {
			
u8	details[64];
		} 
raw_data;

		struct {
			
union ib_gid	gid;
		} 
__packed ntc_64_65_66_67;

		struct {
			
__be32	lid;
		} 
__packed ntc_128;

		struct {
			
__be32	lid;		/* where violation happened */
			
u8	port_num;	/* where violation happened */
		} 
__packed ntc_129_130_131;

		struct {
			
__be32	lid;		/* LID where change occurred */
			
__be32	new_cap_mask;	/* new capability mask */
			
__be16	reserved2;
			
__be16	cap_mask;
			
__be16	change_flags;	/* low 4 bits only */
		} 
__packed ntc_144;

		struct {
			
__be64	new_sys_guid;
			
__be32	lid;		/* lid where sys guid changed */
		} 
__packed ntc_145;

		struct {
			
__be32	lid;
			
__be32	dr_slid;
			
u8	method;
			
u8	dr_trunc_hop;
			
__be16	attr_id;
			
__be32	attr_mod;
			
__be64	mkey;
			
u8	dr_rtn_path[30];
		} 
__packed ntc_256;

		struct {
			
__be32		lid1;
			
__be32		lid2;
			
__be32		key;
			
u8		sl;	/* SL: high 5 bits */
			
u8		reserved3[3];
			
union ib_gid	gid1;
			
union ib_gid	gid2;
			
__be32		qp1;	/* high 8 bits reserved */
			
__be32		qp2;	/* high 8 bits reserved */
		} 
__packed ntc_257_258;

		struct {
			
__be16		flags;	/* low 8 bits reserved */
			
__be16		pkey;
			
__be32		lid1;
			
__be32		lid2;
			
u8		sl;	/* SL: high 5 bits */
			
u8		reserved4[3];
			
union ib_gid	gid1;
			
union ib_gid	gid2;
			
__be32		qp1;	/* high 8 bits reserved */
			
__be32		qp2;	/* high 8 bits reserved */
		} 
__packed ntc_259;

		struct {
			
__be32	lid;
		} 
__packed ntc_2048;

	};
	
u8	class_data[0];
};


#define IB_VLARB_LOWPRI_0_31    1

#define IB_VLARB_LOWPRI_32_63   2

#define IB_VLARB_HIGHPRI_0_31   3

#define IB_VLARB_HIGHPRI_32_63  4


#define OPA_MAX_PREEMPT_CAP         32

#define OPA_VLARB_LOW_ELEMENTS       0

#define OPA_VLARB_HIGH_ELEMENTS      1

#define OPA_VLARB_PREEMPT_ELEMENTS   2

#define OPA_VLARB_PREEMPT_MATRIX     3


#define IB_PMA_PORT_COUNTERS_CONG       cpu_to_be16(0xFF00)


struct ib_pma_portcounters_cong {
	
u8 reserved;
	
u8 reserved1;
	
__be16 port_check_rate;
	
__be16 symbol_error_counter;
	
u8 link_error_recovery_counter;
	
u8 link_downed_counter;
	
__be16 port_rcv_errors;
	
__be16 port_rcv_remphys_errors;
	
__be16 port_rcv_switch_relay_errors;
	
__be16 port_xmit_discards;
	
u8 port_xmit_constraint_errors;
	
u8 port_rcv_constraint_errors;
	
u8 reserved2;
	
u8 link_overrun_errors; /* LocalLink: 7:4, BufferOverrun: 3:0 */
	
__be16 reserved3;
	
__be16 vl15_dropped;
	
__be64 port_xmit_data;
	
__be64 port_rcv_data;
	
__be64 port_xmit_packets;
	
__be64 port_rcv_packets;
	
__be64 port_xmit_wait;
	
__be64 port_adr_events;
} 
__packed;


#define IB_SMP_UNSUP_VERSION    cpu_to_be16(0x0004)

#define IB_SMP_UNSUP_METHOD     cpu_to_be16(0x0008)

#define IB_SMP_UNSUP_METH_ATTR  cpu_to_be16(0x000C)

#define IB_SMP_INVALID_FIELD    cpu_to_be16(0x001C)


#define OPA_MAX_PREEMPT_CAP         32

#define OPA_VLARB_LOW_ELEMENTS       0

#define OPA_VLARB_HIGH_ELEMENTS      1

#define OPA_VLARB_PREEMPT_ELEMENTS   2

#define OPA_VLARB_PREEMPT_MATRIX     3


#define HFI1_XMIT_RATE_UNSUPPORTED               0x0

#define HFI1_XMIT_RATE_PICO                      0x7
/* number of 4nsec cycles equaling 2secs */

#define HFI1_CONG_TIMER_PSINTERVAL               0x1DCD64EC


#define IB_CC_SVCTYPE_RC 0x0

#define IB_CC_SVCTYPE_UC 0x1

#define IB_CC_SVCTYPE_RD 0x2

#define IB_CC_SVCTYPE_UD 0x3

/*
 * There should be an equivalent IB #define for the following, but
 * I cannot find it.
 */

#define OPA_CC_LOG_TYPE_HFI	2


struct opa_hfi1_cong_log_event_internal {
	
u32 lqpn;
	
u32 rqpn;
	
u8 sl;
	
u8 svc_type;
	
u32 rlid;
	
s64 timestamp; /* wider than 32 bits to detect 32 bit rollover */
};


struct opa_hfi1_cong_log_event {
	
u8 local_qp_cn_entry[3];
	
u8 remote_qp_number_cn_entry[3];
	
u8 sl_svc_type_cn_entry; /* 5 bits SL, 3 bits svc type */
	
u8 reserved;
	
__be32 remote_lid_cn_entry;
	
__be32 timestamp_cn_entry;
} 
__packed;


#define OPA_CONG_LOG_ELEMS	96


struct opa_hfi1_cong_log {
	
u8 log_type;
	
u8 congestion_flags;
	
__be16 threshold_event_counter;
	
__be32 current_time_stamp;
	
u8 threshold_cong_event_map[OPA_MAX_SLS / 8];
	
struct opa_hfi1_cong_log_event events[OPA_CONG_LOG_ELEMS];
} 
__packed;


#define IB_CC_TABLE_CAP_DEFAULT 31

/* Port control flags */

#define IB_CC_CCS_PC_SL_BASED 0x01


struct opa_congestion_setting_entry {
	
u8 ccti_increase;
	
u8 reserved;
	
__be16 ccti_timer;
	
u8 trigger_threshold;
	
u8 ccti_min; /* min CCTI for cc table */
} 
__packed;


struct opa_congestion_setting_entry_shadow {
	
u8 ccti_increase;
	
u8 reserved;
	
u16 ccti_timer;
	
u8 trigger_threshold;
	
u8 ccti_min; /* min CCTI for cc table */
} 
__packed;


struct opa_congestion_setting_attr {
	
__be32 control_map;
	
__be16 port_control;
	
struct opa_congestion_setting_entry entries[OPA_MAX_SLS];
} 
__packed;


struct opa_congestion_setting_attr_shadow {
	
u32 control_map;
	
u16 port_control;
	
struct opa_congestion_setting_entry_shadow entries[OPA_MAX_SLS];
} 
__packed;


#define IB_CC_TABLE_ENTRY_INCREASE_DEFAULT 1

#define IB_CC_TABLE_ENTRY_TIMER_DEFAULT 1

/* 64 Congestion Control table entries in a single MAD */

#define IB_CCT_ENTRIES 64

#define IB_CCT_MIN_ENTRIES (IB_CCT_ENTRIES * 2)


struct ib_cc_table_entry {
	
__be16 entry; /* shift:2, multiplier:14 */
};


struct ib_cc_table_entry_shadow {
	
u16 entry; /* shift:2, multiplier:14 */
};


struct ib_cc_table_attr {
	
__be16 ccti_limit; /* max CCTI for cc table */
	
struct ib_cc_table_entry ccti_entries[IB_CCT_ENTRIES];
} 
__packed;


struct ib_cc_table_attr_shadow {
	
u16 ccti_limit; /* max CCTI for cc table */
	
struct ib_cc_table_entry_shadow ccti_entries[IB_CCT_ENTRIES];
} 
__packed;


#define CC_TABLE_SHADOW_MAX \
	(IB_CC_TABLE_CAP_DEFAULT * IB_CCT_ENTRIES)


struct cc_table_shadow {
	
u16 ccti_limit; /* max CCTI for cc table */
	
struct ib_cc_table_entry_shadow entries[CC_TABLE_SHADOW_MAX];
} 
__packed;

/*
 * struct cc_state combines the (active) per-port congestion control
 * table, and the (active) per-SL congestion settings. cc_state data
 * may need to be read in code paths that we want to be fast, so it
 * is an RCU protected structure.
 */

struct cc_state {
	
struct rcu_head rcu;
	
struct cc_table_shadow cct;
	
struct opa_congestion_setting_attr_shadow cong_setting;
};

/*
 * OPA BufferControl MAD
 */

/* attribute modifier macros */

#define OPA_AM_NPORT_SHIFT	24

#define OPA_AM_NPORT_MASK	0xff

#define OPA_AM_NPORT_SMASK	(OPA_AM_NPORT_MASK << OPA_AM_NPORT_SHIFT)

#define OPA_AM_NPORT(am)	(((am) >> OPA_AM_NPORT_SHIFT) & \
                                        OPA_AM_NPORT_MASK)


#define OPA_AM_NBLK_SHIFT	24

#define OPA_AM_NBLK_MASK	0xff

#define OPA_AM_NBLK_SMASK	(OPA_AM_NBLK_MASK << OPA_AM_NBLK_SHIFT)

#define OPA_AM_NBLK(am)		(((am) >> OPA_AM_NBLK_SHIFT) & \
                                        OPA_AM_NBLK_MASK)


#define OPA_AM_START_BLK_SHIFT	0

#define OPA_AM_START_BLK_MASK	0xff

#define OPA_AM_START_BLK_SMASK	(OPA_AM_START_BLK_MASK << \
                                        OPA_AM_START_BLK_SHIFT)

#define OPA_AM_START_BLK(am)	(((am) >> OPA_AM_START_BLK_SHIFT) & \
                                        OPA_AM_START_BLK_MASK)


#define OPA_AM_PORTNUM_SHIFT	0

#define OPA_AM_PORTNUM_MASK	0xff

#define OPA_AM_PORTNUM_SMASK	(OPA_AM_PORTNUM_MASK << OPA_AM_PORTNUM_SHIFT)

#define OPA_AM_PORTNUM(am)	(((am) >> OPA_AM_PORTNUM_SHIFT) & \
                                        OPA_AM_PORTNUM_MASK)


#define OPA_AM_ASYNC_SHIFT	12

#define OPA_AM_ASYNC_MASK	0x1

#define OPA_AM_ASYNC_SMASK	(OPA_AM_ASYNC_MASK << OPA_AM_ASYNC_SHIFT)

#define OPA_AM_ASYNC(am)	(((am) >> OPA_AM_ASYNC_SHIFT) & \
                                        OPA_AM_ASYNC_MASK)


#define OPA_AM_START_SM_CFG_SHIFT	9

#define OPA_AM_START_SM_CFG_MASK	0x1

#define OPA_AM_START_SM_CFG_SMASK	(OPA_AM_START_SM_CFG_MASK << \
                                                OPA_AM_START_SM_CFG_SHIFT)

#define OPA_AM_START_SM_CFG(am)		(((am) >> OPA_AM_START_SM_CFG_SHIFT) \
                                                & OPA_AM_START_SM_CFG_MASK)


#define OPA_AM_CI_ADDR_SHIFT	19

#define OPA_AM_CI_ADDR_MASK	0xfff

#define OPA_AM_CI_ADDR_SMASK	(OPA_AM_CI_ADDR_MASK << OPA_CI_ADDR_SHIFT)

#define OPA_AM_CI_ADDR(am)	(((am) >> OPA_AM_CI_ADDR_SHIFT) & \
                                        OPA_AM_CI_ADDR_MASK)


#define OPA_AM_CI_LEN_SHIFT	13

#define OPA_AM_CI_LEN_MASK	0x3f

#define OPA_AM_CI_LEN_SMASK	(OPA_AM_CI_LEN_MASK << OPA_CI_LEN_SHIFT)

#define OPA_AM_CI_LEN(am)	(((am) >> OPA_AM_CI_LEN_SHIFT) & \
                                        OPA_AM_CI_LEN_MASK)

/* error info macros */

#define OPA_EI_STATUS_SMASK	0x80

#define OPA_EI_CODE_SMASK	0x0f


struct vl_limit {
	
__be16 dedicated;
	
__be16 shared;
};


struct buffer_control {
	
__be16 reserved;
	
__be16 overall_shared_limit;
	
struct vl_limit vl[OPA_MAX_VLS];
};


struct sc2vlnt {
	
u8 vlnt[32]; /* 5 bit VL, 3 bits reserved */
};

/*
 * The PortSamplesControl.CounterMasks field is an array of 3 bit fields
 * which specify the N'th counter's capabilities. See ch. 16.1.3.2.
 * We support 5 counters which only count the mandatory quantities.
 */

#define COUNTER_MASK(q, n) (q << ((9 - n) * 3))

#define COUNTER_MASK0_9 \
	cpu_to_be32(COUNTER_MASK(1, 0) | \
                    COUNTER_MASK(1, 1) | \
                    COUNTER_MASK(1, 2) | \
                    COUNTER_MASK(1, 3) | \
                    COUNTER_MASK(1, 4))

void hfi1_event_pkey_change(struct hfi1_devdata *dd, u8 port);

#endif				/* _HFI1_MAD_H */

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