cregit-Linux how code gets into the kernel

Release 4.12 include/rdma/ib_mad.h

Directory: include/rdma
/*
 * Copyright (c) 2004 Mellanox Technologies Ltd.  All rights reserved.
 * Copyright (c) 2004 Infinicon Corporation.  All rights reserved.
 * Copyright (c) 2004 Intel Corporation.  All rights reserved.
 * Copyright (c) 2004 Topspin Corporation.  All rights reserved.
 * Copyright (c) 2004-2006 Voltaire Corporation.  All rights reserved.
 *
 * This software is available to you under a choice of one of two
 * licenses.  You may choose to be licensed under the terms of the GNU
 * General Public License (GPL) Version 2, available from the file
 * COPYING in the main directory of this source tree, or the
 * OpenIB.org BSD license below:
 *
 *     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.
 *
 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
 * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
 * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
 * NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS
 * BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN
 * ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
 * CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
 * SOFTWARE.
 */

#if !defined(IB_MAD_H)

#define IB_MAD_H

#include <linux/list.h>

#include <rdma/ib_verbs.h>
#include <uapi/rdma/ib_user_mad.h>

/* Management base versions */

#define IB_MGMT_BASE_VERSION			1

#define OPA_MGMT_BASE_VERSION			0x80


#define OPA_SM_CLASS_VERSION			0x80

/* Management classes */

#define IB_MGMT_CLASS_SUBN_LID_ROUTED		0x01

#define IB_MGMT_CLASS_SUBN_DIRECTED_ROUTE	0x81

#define IB_MGMT_CLASS_SUBN_ADM			0x03

#define IB_MGMT_CLASS_PERF_MGMT			0x04

#define IB_MGMT_CLASS_BM			0x05

#define IB_MGMT_CLASS_DEVICE_MGMT		0x06

#define IB_MGMT_CLASS_CM			0x07

#define IB_MGMT_CLASS_SNMP			0x08

#define IB_MGMT_CLASS_DEVICE_ADM		0x10

#define IB_MGMT_CLASS_BOOT_MGMT			0x11

#define IB_MGMT_CLASS_BIS			0x12

#define IB_MGMT_CLASS_CONG_MGMT			0x21

#define IB_MGMT_CLASS_VENDOR_RANGE2_START	0x30

#define IB_MGMT_CLASS_VENDOR_RANGE2_END		0x4F


#define	IB_OPENIB_OUI				(0x001405)

/* Management methods */

#define IB_MGMT_METHOD_GET			0x01

#define IB_MGMT_METHOD_SET			0x02

#define IB_MGMT_METHOD_GET_RESP			0x81

#define IB_MGMT_METHOD_SEND			0x03

#define IB_MGMT_METHOD_TRAP			0x05

#define IB_MGMT_METHOD_REPORT			0x06

#define IB_MGMT_METHOD_REPORT_RESP		0x86

#define IB_MGMT_METHOD_TRAP_REPRESS		0x07


#define IB_MGMT_METHOD_RESP			0x80

#define IB_BM_ATTR_MOD_RESP			cpu_to_be32(1)


#define IB_MGMT_MAX_METHODS			128

/* MAD Status field bit masks */

#define IB_MGMT_MAD_STATUS_SUCCESS			0x0000

#define IB_MGMT_MAD_STATUS_BUSY				0x0001

#define IB_MGMT_MAD_STATUS_REDIRECT_REQD		0x0002

#define IB_MGMT_MAD_STATUS_BAD_VERSION			0x0004

#define IB_MGMT_MAD_STATUS_UNSUPPORTED_METHOD		0x0008

#define IB_MGMT_MAD_STATUS_UNSUPPORTED_METHOD_ATTRIB	0x000c

#define IB_MGMT_MAD_STATUS_INVALID_ATTRIB_VALUE		0x001c

/* RMPP information */

#define IB_MGMT_RMPP_VERSION			1


#define IB_MGMT_RMPP_TYPE_DATA			1

#define IB_MGMT_RMPP_TYPE_ACK			2

#define IB_MGMT_RMPP_TYPE_STOP			3

#define IB_MGMT_RMPP_TYPE_ABORT			4


#define IB_MGMT_RMPP_FLAG_ACTIVE		1

#define IB_MGMT_RMPP_FLAG_FIRST			(1<<1)

#define IB_MGMT_RMPP_FLAG_LAST			(1<<2)


#define IB_MGMT_RMPP_NO_RESPTIME		0x1F


#define	IB_MGMT_RMPP_STATUS_SUCCESS		0

#define	IB_MGMT_RMPP_STATUS_RESX		1

#define	IB_MGMT_RMPP_STATUS_ABORT_MIN		118

#define	IB_MGMT_RMPP_STATUS_T2L			118

#define	IB_MGMT_RMPP_STATUS_BAD_LEN		119

#define	IB_MGMT_RMPP_STATUS_BAD_SEG		120

#define	IB_MGMT_RMPP_STATUS_BADT		121

#define	IB_MGMT_RMPP_STATUS_W2S			122

#define	IB_MGMT_RMPP_STATUS_S2B			123

#define	IB_MGMT_RMPP_STATUS_BAD_STATUS		124

#define	IB_MGMT_RMPP_STATUS_UNV			125

#define	IB_MGMT_RMPP_STATUS_TMR			126

#define	IB_MGMT_RMPP_STATUS_UNSPEC		127

#define	IB_MGMT_RMPP_STATUS_ABORT_MAX		127


#define IB_QP0		0

#define IB_QP1		cpu_to_be32(1)

#define IB_QP1_QKEY	0x80010000

#define IB_QP_SET_QKEY	0x80000000


#define IB_DEFAULT_PKEY_PARTIAL 0x7FFF

#define IB_DEFAULT_PKEY_FULL	0xFFFF

/*
 * Generic trap/notice types
 */

#define IB_NOTICE_TYPE_FATAL	0x80

#define IB_NOTICE_TYPE_URGENT	0x81

#define IB_NOTICE_TYPE_SECURITY	0x82

#define IB_NOTICE_TYPE_SM	0x83

#define IB_NOTICE_TYPE_INFO	0x84

/*
 * Generic trap/notice producers
 */

#define IB_NOTICE_PROD_CA		cpu_to_be16(1)

#define IB_NOTICE_PROD_SWITCH		cpu_to_be16(2)

#define IB_NOTICE_PROD_ROUTER		cpu_to_be16(3)

#define IB_NOTICE_PROD_CLASS_MGR	cpu_to_be16(4)

enum {
	
IB_MGMT_MAD_HDR = 24,
	
IB_MGMT_MAD_DATA = 232,
	
IB_MGMT_RMPP_HDR = 36,
	
IB_MGMT_RMPP_DATA = 220,
	
IB_MGMT_VENDOR_HDR = 40,
	
IB_MGMT_VENDOR_DATA = 216,
	
IB_MGMT_SA_HDR = 56,
	
IB_MGMT_SA_DATA = 200,
	
IB_MGMT_DEVICE_HDR = 64,
	
IB_MGMT_DEVICE_DATA = 192,
	
IB_MGMT_MAD_SIZE = IB_MGMT_MAD_HDR + IB_MGMT_MAD_DATA,
	
OPA_MGMT_MAD_DATA = 2024,
	
OPA_MGMT_RMPP_DATA = 2012,
	
OPA_MGMT_MAD_SIZE = IB_MGMT_MAD_HDR + OPA_MGMT_MAD_DATA,
};


struct ib_mad_hdr {
	
u8	base_version;
	
u8	mgmt_class;
	
u8	class_version;
	
u8	method;
	
__be16	status;
	
__be16	class_specific;
	
__be64	tid;
	
__be16	attr_id;
	
__be16	resv;
	
__be32	attr_mod;
};


struct ib_rmpp_hdr {
	
u8	rmpp_version;
	
u8	rmpp_type;
	
u8	rmpp_rtime_flags;
	
u8	rmpp_status;
	
__be32	seg_num;
	
__be32	paylen_newwin;
};


typedef u64 __bitwise ib_sa_comp_mask;


#define IB_SA_COMP_MASK(n) ((__force ib_sa_comp_mask) cpu_to_be64(1ull << (n)))

/*
 * ib_sa_hdr and ib_sa_mad structures must be packed because they have
 * 64-bit fields that are only 32-bit aligned. 64-bit architectures will
 * lay them out wrong otherwise.  (And unfortunately they are sent on
 * the wire so we can't change the layout)
 */

struct ib_sa_hdr {
	
__be64			sm_key;
	
__be16			attr_offset;
	
__be16			reserved;
	
ib_sa_comp_mask		comp_mask;
} __attribute__ ((packed));


struct ib_mad {
	
struct ib_mad_hdr	mad_hdr;
	
u8			data[IB_MGMT_MAD_DATA];
};


struct opa_mad {
	
struct ib_mad_hdr	mad_hdr;
	
u8			data[OPA_MGMT_MAD_DATA];
};


struct ib_rmpp_mad {
	
struct ib_mad_hdr	mad_hdr;
	
struct ib_rmpp_hdr	rmpp_hdr;
	
u8			data[IB_MGMT_RMPP_DATA];
};


struct opa_rmpp_mad {
	
struct ib_mad_hdr	mad_hdr;
	
struct ib_rmpp_hdr	rmpp_hdr;
	
u8			data[OPA_MGMT_RMPP_DATA];
};


struct ib_sa_mad {
	
struct ib_mad_hdr	mad_hdr;
	
struct ib_rmpp_hdr	rmpp_hdr;
	
struct ib_sa_hdr	sa_hdr;
	
u8			data[IB_MGMT_SA_DATA];
} __attribute__ ((packed));


struct ib_vendor_mad {
	
struct ib_mad_hdr	mad_hdr;
	
struct ib_rmpp_hdr	rmpp_hdr;
	
u8			reserved;
	
u8			oui[3];
	
u8			data[IB_MGMT_VENDOR_DATA];
};


#define IB_MGMT_CLASSPORTINFO_ATTR_ID	cpu_to_be16(0x0001)


#define IB_CLASS_PORT_INFO_RESP_TIME_MASK	0x1F

#define IB_CLASS_PORT_INFO_RESP_TIME_FIELD_SIZE 5


struct ib_class_port_info {
	
u8			base_version;
	
u8			class_version;
	
__be16			capability_mask;
	  /* 27 bits for cap_mask2, 5 bits for resp_time */
	
__be32			cap_mask2_resp_time;
	
u8			redirect_gid[16];
	
__be32			redirect_tcslfl;
	
__be16			redirect_lid;
	
__be16			redirect_pkey;
	
__be32			redirect_qp;
	
__be32			redirect_qkey;
	
u8			trap_gid[16];
	
__be32			trap_tcslfl;
	
__be16			trap_lid;
	
__be16			trap_pkey;
	
__be32			trap_hlqp;
	
__be32			trap_qkey;
};


#define OPA_CLASS_PORT_INFO_PR_SUPPORT BIT(26)


struct opa_class_port_info {
	
u8 base_version;
	
u8 class_version;
	
__be16 cap_mask;
	
__be32 cap_mask2_resp_time;

	
u8 redirect_gid[16];
	
__be32 redirect_tc_fl;
	
__be32 redirect_lid;
	
__be32 redirect_sl_qp;
	
__be32 redirect_qkey;

	
u8 trap_gid[16];
	
__be32 trap_tc_fl;
	
__be32 trap_lid;
	
__be32 trap_hl_qp;
	
__be32 trap_qkey;

	
__be16 trap_pkey;
	
__be16 redirect_pkey;

	
u8 trap_sl_rsvd;
	
u8 reserved[3];

} __packed;

/**
 * ib_get_cpi_resp_time - Returns the resp_time value from
 * cap_mask2_resp_time in ib_class_port_info.
 * @cpi: A struct ib_class_port_info mad.
 */

static inline u8 ib_get_cpi_resp_time(struct ib_class_port_info *cpi) { return (u8)(be32_to_cpu(cpi->cap_mask2_resp_time) & IB_CLASS_PORT_INFO_RESP_TIME_MASK); }

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/** * ib_set_cpi_resptime - Sets the response time in an * ib_class_port_info mad. * @cpi: A struct ib_class_port_info. * @rtime: The response time to set. */
static inline void ib_set_cpi_resp_time(struct ib_class_port_info *cpi, u8 rtime) { cpi->cap_mask2_resp_time = (cpi->cap_mask2_resp_time & cpu_to_be32(~IB_CLASS_PORT_INFO_RESP_TIME_MASK)) | cpu_to_be32(rtime & IB_CLASS_PORT_INFO_RESP_TIME_MASK); }

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/** * ib_get_cpi_capmask2 - Returns the capmask2 value from * cap_mask2_resp_time in ib_class_port_info. * @cpi: A struct ib_class_port_info mad. */
static inline u32 ib_get_cpi_capmask2(struct ib_class_port_info *cpi) { return (be32_to_cpu(cpi->cap_mask2_resp_time) >> IB_CLASS_PORT_INFO_RESP_TIME_FIELD_SIZE); }

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/** * ib_set_cpi_capmask2 - Sets the capmask2 in an * ib_class_port_info mad. * @cpi: A struct ib_class_port_info. * @capmask2: The capmask2 to set. */
static inline void ib_set_cpi_capmask2(struct ib_class_port_info *cpi, u32 capmask2) { cpi->cap_mask2_resp_time = (cpi->cap_mask2_resp_time & cpu_to_be32(IB_CLASS_PORT_INFO_RESP_TIME_MASK)) | cpu_to_be32(capmask2 << IB_CLASS_PORT_INFO_RESP_TIME_FIELD_SIZE); }

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/** * opa_get_cpi_capmask2 - Returns the capmask2 value from * cap_mask2_resp_time in ib_class_port_info. * @cpi: A struct opa_class_port_info mad. */
static inline u32 opa_get_cpi_capmask2(struct opa_class_port_info *cpi) { return (be32_to_cpu(cpi->cap_mask2_resp_time) >> IB_CLASS_PORT_INFO_RESP_TIME_FIELD_SIZE); }

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struct ib_mad_notice_attr { u8 generic_type; u8 prod_type_msb; __be16 prod_type_lsb; __be16 trap_num; __be16 issuer_lid; __be16 toggle_count; union { struct { u8 details[54]; } raw_data; struct { __be16 reserved; __be16 lid; /* where violation happened */ u8 port_num; /* where violation happened */ } __packed ntc_129_131; struct { __be16 reserved; __be16 lid; /* LID where change occurred */ u8 reserved2; u8 local_changes; /* low bit - local changes */ __be32 new_cap_mask; /* new capability mask */ u8 reserved3; u8 change_flags; /* low 3 bits only */ } __packed ntc_144; struct { __be16 reserved; __be16 lid; /* lid where sys guid changed */ __be16 reserved2; __be64 new_sys_guid; } __packed ntc_145; struct { __be16 reserved; __be16 lid; __be16 dr_slid; u8 method; u8 reserved2; __be16 attr_id; __be32 attr_mod; __be64 mkey; u8 reserved3; u8 dr_trunc_hop; u8 dr_rtn_path[30]; } __packed ntc_256; struct { __be16 reserved; __be16 lid1; __be16 lid2; __be32 key; __be32 sl_qp1; /* SL: high 4 bits */ __be32 qp2; /* high 8 bits reserved */ union ib_gid gid1; union ib_gid gid2; } __packed ntc_257_258; } details; }; /** * ib_mad_send_buf - MAD data buffer and work request for sends. * @next: A pointer used to chain together MADs for posting. * @mad: References an allocated MAD data buffer for MADs that do not have * RMPP active. For MADs using RMPP, references the common and management * class specific headers. * @mad_agent: MAD agent that allocated the buffer. * @ah: The address handle to use when sending the MAD. * @context: User-controlled context fields. * @hdr_len: Indicates the size of the data header of the MAD. This length * includes the common MAD, RMPP, and class specific headers. * @data_len: Indicates the total size of user-transferred data. * @seg_count: The number of RMPP segments allocated for this send. * @seg_size: Size of the data in each RMPP segment. This does not include * class specific headers. * @seg_rmpp_size: Size of each RMPP segment including the class specific * headers. * @timeout_ms: Time to wait for a response. * @retries: Number of times to retry a request for a response. For MADs * using RMPP, this applies per window. On completion, returns the number * of retries needed to complete the transfer. * * Users are responsible for initializing the MAD buffer itself, with the * exception of any RMPP header. Additional segment buffer space allocated * beyond data_len is padding. */ struct ib_mad_send_buf { struct ib_mad_send_buf *next; void *mad; struct ib_mad_agent *mad_agent; struct ib_ah *ah; void *context[2]; int hdr_len; int data_len; int seg_count; int seg_size; int seg_rmpp_size; int timeout_ms; int retries; }; /** * ib_response_mad - Returns if the specified MAD has been generated in * response to a sent request or trap. */ int ib_response_mad(const struct ib_mad_hdr *hdr); /** * ib_get_rmpp_resptime - Returns the RMPP response time. * @rmpp_hdr: An RMPP header. */
static inline u8 ib_get_rmpp_resptime(struct ib_rmpp_hdr *rmpp_hdr) { return rmpp_hdr->rmpp_rtime_flags >> 3; }

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/** * ib_get_rmpp_flags - Returns the RMPP flags. * @rmpp_hdr: An RMPP header. */
static inline u8 ib_get_rmpp_flags(struct ib_rmpp_hdr *rmpp_hdr) { return rmpp_hdr->rmpp_rtime_flags & 0x7; }

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/** * ib_set_rmpp_resptime - Sets the response time in an RMPP header. * @rmpp_hdr: An RMPP header. * @rtime: The response time to set. */
static inline void ib_set_rmpp_resptime(struct ib_rmpp_hdr *rmpp_hdr, u8 rtime) { rmpp_hdr->rmpp_rtime_flags = ib_get_rmpp_flags(rmpp_hdr) | (rtime << 3); }

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/** * ib_set_rmpp_flags - Sets the flags in an RMPP header. * @rmpp_hdr: An RMPP header. * @flags: The flags to set. */
static inline void ib_set_rmpp_flags(struct ib_rmpp_hdr *rmpp_hdr, u8 flags) { rmpp_hdr->rmpp_rtime_flags = (rmpp_hdr->rmpp_rtime_flags & 0xF8) | (flags & 0x7); }

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struct ib_mad_agent; struct ib_mad_send_wc; struct ib_mad_recv_wc; /** * ib_mad_send_handler - callback handler for a sent MAD. * @mad_agent: MAD agent that sent the MAD. * @mad_send_wc: Send work completion information on the sent MAD. */ typedef void (*ib_mad_send_handler)(struct ib_mad_agent *mad_agent, struct ib_mad_send_wc *mad_send_wc); /** * ib_mad_snoop_handler - Callback handler for snooping sent MADs. * @mad_agent: MAD agent that snooped the MAD. * @send_buf: send MAD data buffer. * @mad_send_wc: Work completion information on the sent MAD. Valid * only for snooping that occurs on a send completion. * * Clients snooping MADs should not modify data referenced by the @send_buf * or @mad_send_wc. */ typedef void (*ib_mad_snoop_handler)(struct ib_mad_agent *mad_agent, struct ib_mad_send_buf *send_buf, struct ib_mad_send_wc *mad_send_wc); /** * ib_mad_recv_handler - callback handler for a received MAD. * @mad_agent: MAD agent requesting the received MAD. * @send_buf: Send buffer if found, else NULL * @mad_recv_wc: Received work completion information on the received MAD. * * MADs received in response to a send request operation will be handed to * the user before the send operation completes. All data buffers given * to registered agents through this routine are owned by the receiving * client, except for snooping agents. Clients snooping MADs should not * modify the data referenced by @mad_recv_wc. */ typedef void (*ib_mad_recv_handler)(struct ib_mad_agent *mad_agent, struct ib_mad_send_buf *send_buf, struct ib_mad_recv_wc *mad_recv_wc); /** * ib_mad_agent - Used to track MAD registration with the access layer. * @device: Reference to device registration is on. * @qp: Reference to QP used for sending and receiving MADs. * @mr: Memory region for system memory usable for DMA. * @recv_handler: Callback handler for a received MAD. * @send_handler: Callback handler for a sent MAD. * @snoop_handler: Callback handler for snooped sent MADs. * @context: User-specified context associated with this registration. * @hi_tid: Access layer assigned transaction ID for this client. * Unsolicited MADs sent by this client will have the upper 32-bits * of their TID set to this value. * @flags: registration flags * @port_num: Port number on which QP is registered * @rmpp_version: If set, indicates the RMPP version used by this agent. */ enum { IB_MAD_USER_RMPP = IB_USER_MAD_USER_RMPP, }; struct ib_mad_agent { struct ib_device *device; struct ib_qp *qp; ib_mad_recv_handler recv_handler; ib_mad_send_handler send_handler; ib_mad_snoop_handler snoop_handler; void *context; u32 hi_tid; u32 flags; u8 port_num; u8 rmpp_version; }; /** * ib_mad_send_wc - MAD send completion information. * @send_buf: Send MAD data buffer associated with the send MAD request. * @status: Completion status. * @vendor_err: Optional vendor error information returned with a failed * request. */ struct ib_mad_send_wc { struct ib_mad_send_buf *send_buf; enum ib_wc_status status; u32 vendor_err; }; /** * ib_mad_recv_buf - received MAD buffer information. * @list: Reference to next data buffer for a received RMPP MAD. * @grh: References a data buffer containing the global route header. * The data refereced by this buffer is only valid if the GRH is * valid. * @mad: References the start of the received MAD. */ struct ib_mad_recv_buf { struct list_head list; struct ib_grh *grh; union { struct ib_mad *mad; struct opa_mad *opa_mad; }; }; /** * ib_mad_recv_wc - received MAD information. * @wc: Completion information for the received data. * @recv_buf: Specifies the location of the received data buffer(s). * @rmpp_list: Specifies a list of RMPP reassembled received MAD buffers. * @mad_len: The length of the received MAD, without duplicated headers. * @mad_seg_size: The size of individual MAD segments * * For received response, the wr_id contains a pointer to the ib_mad_send_buf * for the corresponding send request. */ struct ib_mad_recv_wc { struct ib_wc *wc; struct ib_mad_recv_buf recv_buf; struct list_head rmpp_list; int mad_len; size_t mad_seg_size; }; /** * ib_mad_reg_req - MAD registration request * @mgmt_class: Indicates which management class of MADs should be receive * by the caller. This field is only required if the user wishes to * receive unsolicited MADs, otherwise it should be 0. * @mgmt_class_version: Indicates which version of MADs for the given * management class to receive. * @oui: Indicates IEEE OUI when mgmt_class is a vendor class * in the range from 0x30 to 0x4f. Otherwise not used. * @method_mask: The caller will receive unsolicited MADs for any method * where @method_mask = 1. * */ struct ib_mad_reg_req { u8 mgmt_class; u8 mgmt_class_version; u8 oui[3]; DECLARE_BITMAP(method_mask, IB_MGMT_MAX_METHODS); }; /** * ib_register_mad_agent - Register to send/receive MADs. * @device: The device to register with. * @port_num: The port on the specified device to use. * @qp_type: Specifies which QP to access. Must be either * IB_QPT_SMI or IB_QPT_GSI. * @mad_reg_req: Specifies which unsolicited MADs should be received * by the caller. This parameter may be NULL if the caller only * wishes to receive solicited responses. * @rmpp_version: If set, indicates that the client will send * and receive MADs that contain the RMPP header for the given version. * If set to 0, indicates that RMPP is not used by this client. * @send_handler: The completion callback routine invoked after a send * request has completed. * @recv_handler: The completion callback routine invoked for a received * MAD. * @context: User specified context associated with the registration. * @registration_flags: Registration flags to set for this agent */ struct ib_mad_agent *ib_register_mad_agent(struct ib_device *device, u8 port_num, enum ib_qp_type qp_type, struct ib_mad_reg_req *mad_reg_req, u8 rmpp_version, ib_mad_send_handler send_handler, ib_mad_recv_handler recv_handler, void *context, u32 registration_flags); enum ib_mad_snoop_flags { /*IB_MAD_SNOOP_POSTED_SENDS = 1,*/ /*IB_MAD_SNOOP_RMPP_SENDS = (1<<1),*/ IB_MAD_SNOOP_SEND_COMPLETIONS = (1<<2), /*IB_MAD_SNOOP_RMPP_SEND_COMPLETIONS = (1<<3),*/ IB_MAD_SNOOP_RECVS = (1<<4) /*IB_MAD_SNOOP_RMPP_RECVS = (1<<5),*/ /*IB_MAD_SNOOP_REDIRECTED_QPS = (1<<6)*/ }; /** * ib_register_mad_snoop - Register to snoop sent and received MADs. * @device: The device to register with. * @port_num: The port on the specified device to use. * @qp_type: Specifies which QP traffic to snoop. Must be either * IB_QPT_SMI or IB_QPT_GSI. * @mad_snoop_flags: Specifies information where snooping occurs. * @send_handler: The callback routine invoked for a snooped send. * @recv_handler: The callback routine invoked for a snooped receive. * @context: User specified context associated with the registration. */ struct ib_mad_agent *ib_register_mad_snoop(struct ib_device *device, u8 port_num, enum ib_qp_type qp_type, int mad_snoop_flags, ib_mad_snoop_handler snoop_handler, ib_mad_recv_handler recv_handler, void *context); /** * ib_unregister_mad_agent - Unregisters a client from using MAD services. * @mad_agent: Corresponding MAD registration request to deregister. * * After invoking this routine, MAD services are no longer usable by the * client on the associated QP. */ void ib_unregister_mad_agent(struct ib_mad_agent *mad_agent); /** * ib_post_send_mad - Posts MAD(s) to the send queue of the QP associated * with the registered client. * @send_buf: Specifies the information needed to send the MAD(s). * @bad_send_buf: Specifies the MAD on which an error was encountered. This * parameter is optional if only a single MAD is posted. * * Sent MADs are not guaranteed to complete in the order that they were posted. * * If the MAD requires RMPP, the data buffer should contain a single copy * of the common MAD, RMPP, and class specific headers, followed by the class * defined data. If the class defined data would not divide evenly into * RMPP segments, then space must be allocated at the end of the referenced * buffer for any required padding. To indicate the amount of class defined * data being transferred, the paylen_newwin field in the RMPP header should * be set to the size of the class specific header plus the amount of class * defined data being transferred. The paylen_newwin field should be * specified in network-byte order. */ int ib_post_send_mad(struct ib_mad_send_buf *send_buf, struct ib_mad_send_buf **bad_send_buf); /** * ib_free_recv_mad - Returns data buffers used to receive a MAD. * @mad_recv_wc: Work completion information for a received MAD. * * Clients receiving MADs through their ib_mad_recv_handler must call this * routine to return the work completion buffers to the access layer. */ void ib_free_recv_mad(struct ib_mad_recv_wc *mad_recv_wc); /** * ib_cancel_mad - Cancels an outstanding send MAD operation. * @mad_agent: Specifies the registration associated with sent MAD. * @send_buf: Indicates the MAD to cancel. * * MADs will be returned to the user through the corresponding * ib_mad_send_handler. */ void ib_cancel_mad(struct ib_mad_agent *mad_agent, struct ib_mad_send_buf *send_buf); /** * ib_modify_mad - Modifies an outstanding send MAD operation. * @mad_agent: Specifies the registration associated with sent MAD. * @send_buf: Indicates the MAD to modify. * @timeout_ms: New timeout value for sent MAD. * * This call will reset the timeout value for a sent MAD to the specified * value. */ int ib_modify_mad(struct ib_mad_agent *mad_agent, struct ib_mad_send_buf *send_buf, u32 timeout_ms); /** * ib_redirect_mad_qp - Registers a QP for MAD services. * @qp: Reference to a QP that requires MAD services. * @rmpp_version: If set, indicates that the client will send * and receive MADs that contain the RMPP header for the given version. * If set to 0, indicates that RMPP is not used by this client. * @send_handler: The completion callback routine invoked after a send * request has completed. * @recv_handler: The completion callback routine invoked for a received * MAD. * @context: User specified context associated with the registration. * * Use of this call allows clients to use MAD services, such as RMPP, * on user-owned QPs. After calling this routine, users may send * MADs on the specified QP by calling ib_mad_post_send. */ struct ib_mad_agent *ib_redirect_mad_qp(struct ib_qp *qp, u8 rmpp_version, ib_mad_send_handler send_handler, ib_mad_recv_handler recv_handler, void *context); /** * ib_process_mad_wc - Processes a work completion associated with a * MAD sent or received on a redirected QP. * @mad_agent: Specifies the registered MAD service using the redirected QP. * @wc: References a work completion associated with a sent or received * MAD segment. * * This routine is used to complete or continue processing on a MAD request. * If the work completion is associated with a send operation, calling * this routine is required to continue an RMPP transfer or to wait for a * corresponding response, if it is a request. If the work completion is * associated with a receive operation, calling this routine is required to * process an inbound or outbound RMPP transfer, or to match a response MAD * with its corresponding request. */ int ib_process_mad_wc(struct ib_mad_agent *mad_agent, struct ib_wc *wc); /** * ib_create_send_mad - Allocate and initialize a data buffer and work request * for sending a MAD. * @mad_agent: Specifies the registered MAD service to associate with the MAD. * @remote_qpn: Specifies the QPN of the receiving node. * @pkey_index: Specifies which PKey the MAD will be sent using. This field * is valid only if the remote_qpn is QP 1. * @rmpp_active: Indicates if the send will enable RMPP. * @hdr_len: Indicates the size of the data header of the MAD. This length * should include the common MAD header, RMPP header, plus any class * specific header. * @data_len: Indicates the size of any user-transferred data. The call will * automatically adjust the allocated buffer size to account for any * additional padding that may be necessary. * @gfp_mask: GFP mask used for the memory allocation. * @base_version: Base Version of this MAD * * This routine allocates a MAD for sending. The returned MAD send buffer * will reference a data buffer usable for sending a MAD, along * with an initialized work request structure. Users may modify the returned * MAD data buffer before posting the send. * * The returned MAD header, class specific headers, and any padding will be * cleared. Users are responsible for initializing the common MAD header, * any class specific header, and MAD data area. * If @rmpp_active is set, the RMPP header will be initialized for sending. */ struct ib_mad_send_buf *ib_create_send_mad(struct ib_mad_agent *mad_agent, u32 remote_qpn, u16 pkey_index, int rmpp_active, int hdr_len, int data_len, gfp_t gfp_mask, u8 base_version); /** * ib_is_mad_class_rmpp - returns whether given management class * supports RMPP. * @mgmt_class: management class * * This routine returns whether the management class supports RMPP. */ int ib_is_mad_class_rmpp(u8 mgmt_class); /** * ib_get_mad_data_offset - returns the data offset for a given * management class. * @mgmt_class: management class * * This routine returns the data offset in the MAD for the management * class requested. */ int ib_get_mad_data_offset(u8 mgmt_class); /** * ib_get_rmpp_segment - returns the data buffer for a given RMPP segment. * @send_buf: Previously allocated send data buffer. * @seg_num: number of segment to return * * This routine returns a pointer to the data buffer of an RMPP MAD. * Users must provide synchronization to @send_buf around this call. */ void *ib_get_rmpp_segment(struct ib_mad_send_buf *send_buf, int seg_num); /** * ib_free_send_mad - Returns data buffers used to send a MAD. * @send_buf: Previously allocated send data buffer. */ void ib_free_send_mad(struct ib_mad_send_buf *send_buf); /** * ib_mad_kernel_rmpp_agent - Returns if the agent is performing RMPP. * @agent: the agent in question * @return: true if agent is performing rmpp, false otherwise. */ int ib_mad_kernel_rmpp_agent(const struct ib_mad_agent *agent); #endif /* IB_MAD_H */

Overall Contributors

PersonTokensPropCommitsCommitProp
Roland Dreier63836.05%37.89%
Hal Rosenstock37321.07%718.42%
Dennis Dalessandro22012.43%12.63%
Erez Shitrit1417.97%12.63%
Ira Weiny1166.55%821.05%
Sean Hefty1146.44%615.79%
Dasaratharaman Chandramouli985.54%25.26%
Swapna Thete291.64%12.63%
Jack Morgenstein271.53%25.26%
Christoph Hellwig60.34%12.63%
Dotan Barak40.23%25.26%
Al Viro10.06%12.63%
Harvey Harrison10.06%12.63%
Zhu Yanjun10.06%12.63%
Ramachandra K10.06%12.63%
Total1770100.00%38100.00%
Directory: include/rdma
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