IB: IP address based RDMA connection manager (e51060f0) · Commits · e / devices / android_kernel_oneplus_sm8150

drivers/infiniband/core/Makefile

+4 −2

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		addr_trans-$(CONFIG_INFINIBAND_ADDR_TRANS) := ib_addr.o
		infiniband-$(CONFIG_INFINIBAND_ADDR_TRANS) := ib_addr.o rdma_cm.o

		obj-$(CONFIG_INFINIBAND) += ib_core.o ib_mad.o ib_sa.o \
		ib_cm.o $(addr_trans-y)
		ib_cm.o $(infiniband-y)
		obj-$(CONFIG_INFINIBAND_USER_MAD) += ib_umad.o
		obj-$(CONFIG_INFINIBAND_USER_ACCESS) += ib_uverbs.o ib_ucm.o

		@@ -14,6 +14,8 @@ ib_sa-y := sa_query.o

		ib_cm-y := cm.o

		rdma_cm-y := cma.o

		ib_addr-y := addr.o

		ib_umad-y := user_mad.o

drivers/infiniband/core/cma.c

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include/rdma/rdma_cm.h

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		/*
		* Copyright (c) 2005 Voltaire Inc. All rights reserved.
		* Copyright (c) 2005 Intel Corporation. All rights reserved.
		*
		* This Software is licensed under one of the following licenses:
		*
		* 1) under the terms of the "Common Public License 1.0" a copy of which is
		* available from the Open Source Initiative, see
		* http://www.opensource.org/licenses/cpl.php.
		*
		* 2) under the terms of the "The BSD License" a copy of which is
		* available from the Open Source Initiative, see
		* http://www.opensource.org/licenses/bsd-license.php.
		*
		* 3) under the terms of the "GNU General Public License (GPL) Version 2" a
		* copy of which is available from the Open Source Initiative, see
		* http://www.opensource.org/licenses/gpl-license.php.
		*
		* Licensee has the right to choose one of the above licenses.
		*
		* Redistributions of source code must retain the above copyright
		* notice and one of the license notices.
		*
		* Redistributions in binary form must reproduce both the above copyright
		* notice, one of the license notices in the documentation
		* and/or other materials provided with the distribution.
		*
		*/

		#if !defined(RDMA_CM_H)
		#define RDMA_CM_H

		#include <linux/socket.h>
		#include <linux/in6.h>
		#include <rdma/ib_addr.h>
		#include <rdma/ib_sa.h>

		/*
		* Upon receiving a device removal event, users must destroy the associated
		* RDMA identifier and release all resources allocated with the device.
		*/
		enum rdma_cm_event_type {
		RDMA_CM_EVENT_ADDR_RESOLVED,
		RDMA_CM_EVENT_ADDR_ERROR,
		RDMA_CM_EVENT_ROUTE_RESOLVED,
		RDMA_CM_EVENT_ROUTE_ERROR,
		RDMA_CM_EVENT_CONNECT_REQUEST,
		RDMA_CM_EVENT_CONNECT_RESPONSE,
		RDMA_CM_EVENT_CONNECT_ERROR,
		RDMA_CM_EVENT_UNREACHABLE,
		RDMA_CM_EVENT_REJECTED,
		RDMA_CM_EVENT_ESTABLISHED,
		RDMA_CM_EVENT_DISCONNECTED,
		RDMA_CM_EVENT_DEVICE_REMOVAL,
		};

		enum rdma_port_space {
		RDMA_PS_SDP = 0x0001,
		RDMA_PS_TCP = 0x0106,
		RDMA_PS_UDP = 0x0111,
		RDMA_PS_SCTP = 0x0183
		};

		struct rdma_addr {
		struct sockaddr src_addr;
		u8 src_pad[sizeof(struct sockaddr_in6) -
		sizeof(struct sockaddr)];
		struct sockaddr dst_addr;
		u8 dst_pad[sizeof(struct sockaddr_in6) -
		sizeof(struct sockaddr)];
		struct rdma_dev_addr dev_addr;
		};

		struct rdma_route {
		struct rdma_addr addr;
		struct ib_sa_path_rec *path_rec;
		int num_paths;
		};

		struct rdma_cm_event {
		enum rdma_cm_event_type event;
		int status;
		void *private_data;
		u8 private_data_len;
		};

		struct rdma_cm_id;

		/**
		* rdma_cm_event_handler - Callback used to report user events.
		*
		* Notes: Users may not call rdma_destroy_id from this callback to destroy
		* the passed in id, or a corresponding listen id. Returning a
		* non-zero value from the callback will destroy the passed in id.
		*/
		typedef int (rdma_cm_event_handler)(struct rdma_cm_id id,
		struct rdma_cm_event *event);

		struct rdma_cm_id {
		struct ib_device *device;
		void *context;
		struct ib_qp *qp;
		rdma_cm_event_handler event_handler;
		struct rdma_route route;
		enum rdma_port_space ps;
		u8 port_num;
		};

		/**
		* rdma_create_id - Create an RDMA identifier.
		*
		* @event_handler: User callback invoked to report events associated with the
		* returned rdma_id.
		* @context: User specified context associated with the id.
		* @ps: RDMA port space.
		*/
		struct rdma_cm_id *rdma_create_id(rdma_cm_event_handler event_handler,
		void *context, enum rdma_port_space ps);

		void rdma_destroy_id(struct rdma_cm_id *id);

		/**
		* rdma_bind_addr - Bind an RDMA identifier to a source address and
		* associated RDMA device, if needed.
		*
		* @id: RDMA identifier.
		* @addr: Local address information. Wildcard values are permitted.
		*
		* This associates a source address with the RDMA identifier before calling
		* rdma_listen. If a specific local address is given, the RDMA identifier will
		* be bound to a local RDMA device.
		*/
		int rdma_bind_addr(struct rdma_cm_id id, struct sockaddr addr);

		/**
		* rdma_resolve_addr - Resolve destination and optional source addresses
		* from IP addresses to an RDMA address. If successful, the specified
		* rdma_cm_id will be bound to a local device.
		*
		* @id: RDMA identifier.
		* @src_addr: Source address information. This parameter may be NULL.
		* @dst_addr: Destination address information.
		* @timeout_ms: Time to wait for resolution to complete.
		*/
		int rdma_resolve_addr(struct rdma_cm_id id, struct sockaddr src_addr,
		struct sockaddr *dst_addr, int timeout_ms);

		/**
		* rdma_resolve_route - Resolve the RDMA address bound to the RDMA identifier
		* into route information needed to establish a connection.
		*
		* This is called on the client side of a connection.
		* Users must have first called rdma_resolve_addr to resolve a dst_addr
		* into an RDMA address before calling this routine.
		*/
		int rdma_resolve_route(struct rdma_cm_id *id, int timeout_ms);

		/**
		* rdma_create_qp - Allocate a QP and associate it with the specified RDMA
		* identifier.
		*
		* QPs allocated to an rdma_cm_id will automatically be transitioned by the CMA
		* through their states.
		*/
		int rdma_create_qp(struct rdma_cm_id id, struct ib_pd pd,
		struct ib_qp_init_attr *qp_init_attr);

		/**
		* rdma_destroy_qp - Deallocate the QP associated with the specified RDMA
		* identifier.
		*
		* Users must destroy any QP associated with an RDMA identifier before
		* destroying the RDMA ID.
		*/
		void rdma_destroy_qp(struct rdma_cm_id *id);

		/**
		* rdma_init_qp_attr - Initializes the QP attributes for use in transitioning
		* to a specified QP state.
		* @id: Communication identifier associated with the QP attributes to
		* initialize.
		* @qp_attr: On input, specifies the desired QP state. On output, the
		* mandatory and desired optional attributes will be set in order to
		* modify the QP to the specified state.
		* @qp_attr_mask: The QP attribute mask that may be used to transition the
		* QP to the specified state.
		*
		* Users must set the @qp_attr->qp_state to the desired QP state. This call
		* will set all required attributes for the given transition, along with
		* known optional attributes. Users may override the attributes returned from
		* this call before calling ib_modify_qp.
		*
		* Users that wish to have their QP automatically transitioned through its
		* states can associate a QP with the rdma_cm_id by calling rdma_create_qp().
		*/
		int rdma_init_qp_attr(struct rdma_cm_id id, struct ib_qp_attr qp_attr,
		int *qp_attr_mask);

		struct rdma_conn_param {
		const void *private_data;
		u8 private_data_len;
		u8 responder_resources;
		u8 initiator_depth;
		u8 flow_control;
		u8 retry_count; /* ignored when accepting */
		u8 rnr_retry_count;
		/* Fields below ignored if a QP is created on the rdma_cm_id. */
		u8 srq;
		u32 qp_num;
		enum ib_qp_type qp_type;
		};

		/**
		* rdma_connect - Initiate an active connection request.
		*
		* Users must have resolved a route for the rdma_cm_id to connect with
		* by having called rdma_resolve_route before calling this routine.
		*/
		int rdma_connect(struct rdma_cm_id id, struct rdma_conn_param conn_param);

		/**
		* rdma_listen - This function is called by the passive side to
		* listen for incoming connection requests.
		*
		* Users must have bound the rdma_cm_id to a local address by calling
		* rdma_bind_addr before calling this routine.
		*/
		int rdma_listen(struct rdma_cm_id *id, int backlog);

		/**
		* rdma_accept - Called to accept a connection request or response.
		* @id: Connection identifier associated with the request.
		* @conn_param: Information needed to establish the connection. This must be
		* provided if accepting a connection request. If accepting a connection
		* response, this parameter must be NULL.
		*
		* Typically, this routine is only called by the listener to accept a connection
		* request. It must also be called on the active side of a connection if the
		* user is performing their own QP transitions.
		*/
		int rdma_accept(struct rdma_cm_id id, struct rdma_conn_param conn_param);

		/**
		* rdma_reject - Called to reject a connection request or response.
		*/
		int rdma_reject(struct rdma_cm_id id, const void private_data,
		u8 private_data_len);

		/**
		* rdma_disconnect - This function disconnects the associated QP and
		* transitions it into the error state.
		*/
		int rdma_disconnect(struct rdma_cm_id *id);

		#endif /* RDMA_CM_H */

include/rdma/rdma_cm_ib.h

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		/*
		* Copyright (c) 2006 Intel Corporation. All rights reserved.
		*
		* This Software is licensed under one of the following licenses:
		*
		* 1) under the terms of the "Common Public License 1.0" a copy of which is
		* available from the Open Source Initiative, see
		* http://www.opensource.org/licenses/cpl.php.
		*
		* 2) under the terms of the "The BSD License" a copy of which is
		* available from the Open Source Initiative, see
		* http://www.opensource.org/licenses/bsd-license.php.
		*
		* 3) under the terms of the "GNU General Public License (GPL) Version 2" a
		* copy of which is available from the Open Source Initiative, see
		* http://www.opensource.org/licenses/gpl-license.php.
		*
		* Licensee has the right to choose one of the above licenses.
		*
		* Redistributions of source code must retain the above copyright
		* notice and one of the license notices.
		*
		* Redistributions in binary form must reproduce both the above copyright
		* notice, one of the license notices in the documentation
		* and/or other materials provided with the distribution.
		*
		*/

		#if !defined(RDMA_CM_IB_H)
		#define RDMA_CM_IB_H

		#include <rdma/rdma_cm.h>

		/**
		* rdma_set_ib_paths - Manually sets the path records used to establish a
		* connection.
		* @id: Connection identifier associated with the request.
		* @path_rec: Reference to the path record
		*
		* This call permits a user to specify routing information for rdma_cm_id's
		* bound to Infiniband devices. It is called on the client side of a
		* connection and replaces the call to rdma_resolve_route.
		*/
		int rdma_set_ib_paths(struct rdma_cm_id *id,
		struct ib_sa_path_rec *path_rec, int num_paths);

		#endif /* RDMA_CM_IB_H */