1 files changed, 579 insertions, 0 deletions

diff --git a/include/rdma/ib_mad.h b/include/rdma/ib_mad.h
new file mode 100644
index 000000000000..fc6b1c18ffc6
--- /dev/null
+++ b/include/rdma/ib_mad.h
@@ -0,0 +1,579 @@
+/*
+ * 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 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.
+ *
+ * $Id: ib_mad.h 2775 2005-07-02 13:42:12Z halr $
+ */
+
+#if !defined( IB_MAD_H )
+#define IB_MAD_H
+
+#include <linux/pci.h>
+
+#include <rdma/ib_verbs.h>
+
+/* Management base version */
+#define IB_MGMT_BASE_VERSION                    1
+
+/* 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_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_MGMT_MAX_METHODS                     128
+
+/* 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          __constant_htonl(1)
+#define IB_QP1_QKEY     0x80010000
+#define IB_QP_SET_QKEY  0x80000000
+
+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[232];
+};
+
+struct ib_rmpp_mad {
+        struct ib_mad_hdr       mad_hdr;
+        struct ib_rmpp_hdr      rmpp_hdr;
+        u8                      data[220];
+};
+
+struct ib_sa_mad {
+        struct ib_mad_hdr       mad_hdr;
+        struct ib_rmpp_hdr      rmpp_hdr;
+        struct ib_sa_hdr        sa_hdr;
+        u8                      data[200];
+} __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[216];
+};
+
+/**
+ * ib_mad_send_buf - MAD data buffer and work request for sends.
+ * @mad: References an allocated MAD data buffer.  The size of the data
+ *   buffer is specified in the @send_wr.length field.
+ * @mapping: DMA mapping information.
+ * @mad_agent: MAD agent that allocated the buffer.
+ * @context: User-controlled context fields.
+ * @send_wr: An initialized work request structure used when sending the MAD.
+ *   The wr_id field of the work request is initialized to reference this
+ *   data structure.
+ * @sge: A scatter-gather list referenced by the work request.
+ *
+ * Users are responsible for initializing the MAD buffer itself, with the
+ * exception of specifying the payload length field in any RMPP MAD.
+ */
+struct ib_mad_send_buf {
+        struct ib_mad           *mad;
+        DECLARE_PCI_UNMAP_ADDR(mapping)
+        struct ib_mad_agent     *mad_agent;
+        void                    *context[2];
+        struct ib_send_wr       send_wr;
+        struct ib_sge           sge;
+};
+
+/**
+ * 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;
+}
+
+/**
+ * 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;
+}
+
+/**
+ * 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);
+}
+
+/**
+ * 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 & 0xF1) |
+                                     (flags & 0x7);
+}
+
+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_wr: Work request information on the sent MAD.
+ * @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_wr
+ * or @mad_send_wc.
+ */
+typedef void (*ib_mad_snoop_handler)(struct ib_mad_agent *mad_agent,
+                                     struct ib_send_wr *send_wr,
+                                     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.
+ * @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 after 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_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.
+ * @port_num: Port number on which QP is registered
+ * @rmpp_version: If set, indicates the RMPP version used by this agent.
+ */
+struct ib_mad_agent {
+        struct ib_device        *device;
+        struct ib_qp            *qp;
+        struct ib_mr            *mr;
+        ib_mad_recv_handler     recv_handler;
+        ib_mad_send_handler     send_handler;
+        ib_mad_snoop_handler    snoop_handler;
+        void                    *context;
+        u32                     hi_tid;
+        u8                      port_num;
+        u8                      rmpp_version;
+};
+
+/**
+ * ib_mad_send_wc - MAD send completion information.
+ * @wr_id: Work request identifier 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 {
+        u64                     wr_id;
+        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;
+        struct ib_mad           *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.
+ *
+ * For received response, the wr_id field of the wc is set to the wr_id
+ *   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;
+};
+
+/**
+ * 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.
+ */
+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);
+
+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.
+ */
+int 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.
+ * @mad_agent: Specifies the associated registration to post the send to.
+ * @send_wr: Specifies the information needed to send the MAD(s).
+ * @bad_send_wr: Specifies the MAD on which an error was encountered.
+ *
+ * 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_agent *mad_agent,
+                     struct ib_send_wr *send_wr,
+                     struct ib_send_wr **bad_send_wr);
+
+/**
+ * ib_coalesce_recv_mad - Coalesces received MAD data into a single buffer.
+ * @mad_recv_wc: Work completion information for a received MAD.
+ * @buf: User-provided data buffer to receive the coalesced buffers.  The
+ *   referenced buffer should be at least the size of the mad_len specified
+ *   by @mad_recv_wc.
+ *
+ * This call copies a chain of received MAD segments into a single data buffer,
+ * removing duplicated headers.
+ */
+void ib_coalesce_recv_mad(struct ib_mad_recv_wc *mad_recv_wc, void *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.
+ * @wr_id: Indicates the work request identifier of 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, u64 wr_id);
+
+/**
+ * ib_modify_mad - Modifies an outstanding send MAD operation.
+ * @mad_agent: Specifies the registration associated with sent MAD.
+ * @wr_id: Indicates the work request identifier of 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, u64 wr_id, 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.
+ * @ah: References the address handle used to transfer to the remote node.
+ * @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.
+ *
+ * This is a helper routine that may be used to allocate a MAD.  Users are
+ * not required to allocate outbound MADs using this call.  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 or work request before posting the send.
+ *
+ * The returned data buffer will be cleared.  Users are responsible for
+ * initializing the common MAD and any class specific headers.  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,
+                                            struct ib_ah *ah, int rmpp_active,
+                                            int hdr_len, int data_len,
+                                            unsigned int __nocast gfp_mask);
+
+/**
+ * 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);
+
+#endif /* IB_MAD_H */