Adding upstream version 4.19.249.upstream/4.19.249

Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>

1 files changed, 426 insertions, 0 deletions

diff --git a/include/rdma/rdma_cm.h b/include/rdma/rdma_cm.h
new file mode 100644
index 000000000..5d71a7f51
--- /dev/null
+++ b/include/rdma/rdma_cm.h
@@ -0,0 +1,426 @@
+/*
+ * Copyright (c) 2005 Voltaire Inc.  All rights reserved.
+ * Copyright (c) 2005 Intel 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(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>
+#include <uapi/rdma/rdma_user_cm.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,
+	RDMA_CM_EVENT_MULTICAST_JOIN,
+	RDMA_CM_EVENT_MULTICAST_ERROR,
+	RDMA_CM_EVENT_ADDR_CHANGE,
+	RDMA_CM_EVENT_TIMEWAIT_EXIT
+};
+
+const char *__attribute_const__ rdma_event_msg(enum rdma_cm_event_type event);
+
+#define RDMA_IB_IP_PS_MASK   0xFFFFFFFFFFFF0000ULL
+#define RDMA_IB_IP_PS_TCP    0x0000000001060000ULL
+#define RDMA_IB_IP_PS_UDP    0x0000000001110000ULL
+#define RDMA_IB_IP_PS_IB     0x00000000013F0000ULL
+
+struct rdma_addr {
+	struct sockaddr_storage src_addr;
+	struct sockaddr_storage dst_addr;
+	struct rdma_dev_addr dev_addr;
+};
+
+struct rdma_route {
+	struct rdma_addr addr;
+	struct sa_path_rec *path_rec;
+	int num_paths;
+};
+
+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;
+	u32 qkey;
+};
+
+struct rdma_ud_param {
+	const void *private_data;
+	u8 private_data_len;
+	struct rdma_ah_attr ah_attr;
+	u32 qp_num;
+	u32 qkey;
+};
+
+struct rdma_cm_event {
+	enum rdma_cm_event_type	 event;
+	int			 status;
+	union {
+		struct rdma_conn_param	conn;
+		struct rdma_ud_param	ud;
+	} param;
+};
+
+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_ucm_port_space ps;
+	enum ib_qp_type		 qp_type;
+	u8			 port_num;
+};
+
+struct rdma_cm_id *__rdma_create_id(struct net *net,
+				    rdma_cm_event_handler event_handler,
+				    void *context, enum rdma_ucm_port_space ps,
+				    enum ib_qp_type qp_type,
+				    const char *caller);
+
+/**
+ * rdma_create_id - Create an RDMA identifier.
+ *
+ * @net: The network namespace in which to create the new id.
+ * @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.
+ * @qp_type: type of queue pair associated with the id.
+ *
+ * The id holds a reference on the network namespace until it is destroyed.
+ */
+#define rdma_create_id(net, event_handler, context, ps, qp_type) \
+	__rdma_create_id((net), (event_handler), (context), (ps), (qp_type), \
+			 KBUILD_MODNAME)
+
+/**
+  * rdma_destroy_id - Destroys an RDMA identifier.
+  *
+  * @id: RDMA identifier.
+  *
+  * Note: calling this function has the effect of canceling in-flight
+  * asynchronous operations associated with the id.
+  */
+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,
+		      const 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);
+
+/**
+ * rdma_connect - Initiate an active connection request.
+ * @id: Connection identifier to connect.
+ * @conn_param: Connection information used for connected QPs.
+ *
+ * Users must have resolved a route for the rdma_cm_id to connect with
+ * by having called rdma_resolve_route before calling this routine.
+ *
+ * This call will either connect to a remote QP or obtain remote QP
+ * information for unconnected rdma_cm_id's.  The actual operation is
+ * based on the rdma_cm_id's port space.
+ */
+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);
+
+int __rdma_accept(struct rdma_cm_id *id, struct rdma_conn_param *conn_param,
+		  const char *caller);
+
+/**
+ * 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.
+ *
+ * In the case of error, a reject message is sent to the remote side and the
+ * state of the qp associated with the id is modified to error, such that any
+ * previously posted receive buffers would be flushed.
+ */
+#define rdma_accept(id, conn_param) \
+	__rdma_accept((id), (conn_param),  KBUILD_MODNAME)
+
+/**
+ * rdma_notify - Notifies the RDMA CM of an asynchronous event that has
+ * occurred on the connection.
+ * @id: Connection identifier to transition to established.
+ * @event: Asynchronous event.
+ *
+ * This routine should be invoked by users to notify the CM of relevant
+ * communication events.  Events that should be reported to the CM and
+ * when to report them are:
+ *
+ * IB_EVENT_COMM_EST - Used when a message is received on a connected
+ *    QP before an RTU has been received.
+ */
+int rdma_notify(struct rdma_cm_id *id, enum ib_event_type event);
+
+/**
+ * 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);
+
+/**
+ * rdma_join_multicast - Join the multicast group specified by the given
+ *   address.
+ * @id: Communication identifier associated with the request.
+ * @addr: Multicast address identifying the group to join.
+ * @join_state: Multicast JoinState bitmap requested by port.
+ *		Bitmap is based on IB_SA_MCMEMBER_REC_JOIN_STATE bits.
+ * @context: User-defined context associated with the join request, returned
+ * to the user through the private_data pointer in multicast events.
+ */
+int rdma_join_multicast(struct rdma_cm_id *id, struct sockaddr *addr,
+			u8 join_state, void *context);
+
+/**
+ * rdma_leave_multicast - Leave the multicast group specified by the given
+ *   address.
+ */
+void rdma_leave_multicast(struct rdma_cm_id *id, struct sockaddr *addr);
+
+/**
+ * rdma_set_service_type - Set the type of service associated with a
+ *   connection identifier.
+ * @id: Communication identifier to associated with service type.
+ * @tos: Type of service.
+ *
+ * The type of service is interpretted as a differentiated service
+ * field (RFC 2474).  The service type should be specified before
+ * performing route resolution, as existing communication on the
+ * connection identifier may be unaffected.  The type of service
+ * requested may not be supported by the network to all destinations.
+ */
+void rdma_set_service_type(struct rdma_cm_id *id, int tos);
+
+/**
+ * rdma_set_reuseaddr - Allow the reuse of local addresses when binding
+ *    the rdma_cm_id.
+ * @id: Communication identifier to configure.
+ * @reuse: Value indicating if the bound address is reusable.
+ *
+ * Reuse must be set before an address is bound to the id.
+ */
+int rdma_set_reuseaddr(struct rdma_cm_id *id, int reuse);
+
+/**
+ * rdma_set_afonly - Specify that listens are restricted to the
+ *    bound address family only.
+ * @id: Communication identifer to configure.
+ * @afonly: Value indicating if listens are restricted.
+ *
+ * Must be set before identifier is in the listening state.
+ */
+int rdma_set_afonly(struct rdma_cm_id *id, int afonly);
+
+ /**
+ * rdma_get_service_id - Return the IB service ID for a specified address.
+ * @id: Communication identifier associated with the address.
+ * @addr: Address for the service ID.
+ */
+__be64 rdma_get_service_id(struct rdma_cm_id *id, struct sockaddr *addr);
+
+/**
+ * rdma_reject_msg - return a pointer to a reject message string.
+ * @id: Communication identifier that received the REJECT event.
+ * @reason: Value returned in the REJECT event status field.
+ */
+const char *__attribute_const__ rdma_reject_msg(struct rdma_cm_id *id,
+						int reason);
+/**
+ * rdma_is_consumer_reject - return true if the consumer rejected the connect
+ *                           request.
+ * @id: Communication identifier that received the REJECT event.
+ * @reason: Value returned in the REJECT event status field.
+ */
+bool rdma_is_consumer_reject(struct rdma_cm_id *id, int reason);
+
+/**
+ * rdma_consumer_reject_data - return the consumer reject private data and
+ *			       length, if any.
+ * @id: Communication identifier that received the REJECT event.
+ * @ev: RDMA CM reject event.
+ * @data_len: Pointer to the resulting length of the consumer data.
+ */
+const void *rdma_consumer_reject_data(struct rdma_cm_id *id,
+				      struct rdma_cm_event *ev, u8 *data_len);
+
+/**
+ * rdma_read_gids - Return the SGID and DGID used for establishing
+ *                  connection. This can be used after rdma_resolve_addr()
+ *                  on client side. This can be use on new connection
+ *                  on server side. This is applicable to IB, RoCE, iWarp.
+ *                  If cm_id is not bound yet to the RDMA device, it doesn't
+ *                  copy and SGID or DGID to the given pointers.
+ * @id: Communication identifier whose GIDs are queried.
+ * @sgid: Pointer to SGID where SGID will be returned. It is optional.
+ * @dgid: Pointer to DGID where DGID will be returned. It is optional.
+ * Note: This API should not be used by any new ULPs or new code.
+ * Instead, users interested in querying GIDs should refer to path record
+ * of the rdma_cm_id to query the GIDs.
+ * This API is provided for compatibility for existing users.
+ */
+
+void rdma_read_gids(struct rdma_cm_id *cm_id, union ib_gid *sgid,
+		    union ib_gid *dgid);
+
+struct iw_cm_id *rdma_iw_cm_id(struct rdma_cm_id *cm_id);
+struct rdma_cm_id *rdma_res_to_id(struct rdma_restrack_entry *res);
+
+#endif /* RDMA_CM_H */