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Subject[PATCH][v3][4/21] Add InfiniBand MAD (management datagram) support (public headers)
Add public headers for handling InfiniBand MADs (management
datagrams), including sending and receiving MADs as well as passing
MADs on to local agents.

Signed-off-by: Roland Dreier <roland@topspin.com>


--- /dev/null 1970-01-01 00:00:00.000000000 +0000
+++ linux-bk/drivers/infiniband/include/ib_mad.h 2004-12-13 09:44:42.628445443 -0800
@@ -0,0 +1,393 @@
+/*
+ * 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 at
+ * <http://www.fsf.org/copyleft/gpl.html>, or the OpenIB.org BSD
+ * license, available in the LICENSE.TXT file accompanying this
+ * software. These details are also available at
+ * <http://openib.org/license.html>.
+ *
+ * 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.
+ *
+ * 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.
+ *
+ * $Id$
+ */
+
+#if !defined( IB_MAD_H )
+#define IB_MAD_H
+
+#include <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
+
+/* 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
+
+#define IB_QP0 0
+#define IB_QP1 cpu_to_be32(1)
+#define IB_QP1_QKEY 0x80010000
+
+struct ib_grh {
+ u32 version_tclass_flow;
+ u16 paylen;
+ u8 next_hdr;
+ u8 hop_limit;
+ union ib_gid sgid;
+ union ib_gid dgid;
+} __attribute__ ((packed));
+
+struct ib_mad_hdr {
+ u8 base_version;
+ u8 mgmt_class;
+ u8 class_version;
+ u8 method;
+ u16 status;
+ u16 class_specific;
+ u64 tid;
+ u16 attr_id;
+ u16 resv;
+ u32 attr_mod;
+} __attribute__ ((packed));
+
+struct ib_rmpp_hdr {
+ u8 rmpp_version;
+ u8 rmpp_type;
+ u8 rmpp_rtime_flags;
+ u8 rmpp_status;
+ u32 seg_num;
+ u32 paylen_newwin;
+} __attribute__ ((packed));
+
+struct ib_mad {
+ struct ib_mad_hdr mad_hdr;
+ u8 data[232];
+} __attribute__ ((packed));
+
+struct ib_rmpp_mad {
+ struct ib_mad_hdr mad_hdr;
+ struct ib_rmpp_hdr rmpp_hdr;
+ u8 data[220];
+} __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];
+} __attribute__ ((packed));
+
+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.
+ * @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
+ */
+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;
+ u8 port_num;
+};
+
+/**
+ * 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).
+ * @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;
+ 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.
+ */
+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 RMPP MADs 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 to the
+ * access layer.
+ * @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_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);
+
+#endif /* IB_MAD_H */
--- /dev/null 1970-01-01 00:00:00.000000000 +0000
+++ linux-bk/drivers/infiniband/include/ib_smi.h 2004-12-13 09:44:42.653441760 -0800
@@ -0,0 +1,67 @@
+/*
+ * 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 at
+ * <http://www.fsf.org/copyleft/gpl.html>, or the OpenIB.org BSD
+ * license, available in the LICENSE.TXT file accompanying this
+ * software. These details are also available at
+ * <http://openib.org/license.html>.
+ *
+ * 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.
+ *
+ * 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.
+ *
+ * $Id$
+ */
+
+#if !defined( IB_SMI_H )
+#define IB_SMI_H
+
+#include <ib_mad.h>
+
+#define IB_LID_PERMISSIVE 0xFFFF
+
+#define IB_SMP_DATA_SIZE 64
+#define IB_SMP_MAX_PATH_HOPS 64
+
+struct ib_smp {
+ u8 base_version;
+ u8 mgmt_class;
+ u8 class_version;
+ u8 method;
+ u16 status;
+ u8 hop_ptr;
+ u8 hop_cnt;
+ u64 tid;
+ u16 attr_id;
+ u16 resv;
+ u32 attr_mod;
+ u64 mkey;
+ u16 dr_slid;
+ u16 dr_dlid;
+ u8 reserved[28];
+ u8 data[IB_SMP_DATA_SIZE];
+ u8 initial_path[IB_SMP_MAX_PATH_HOPS];
+ u8 return_path[IB_SMP_MAX_PATH_HOPS];
+} __attribute__ ((packed));
+
+#define IB_SMP_DIRECTION cpu_to_be16(0x8000)
+
+static inline u8
+ib_get_smp_direction(struct ib_smp *smp)
+{
+ return ((smp->status & IB_SMP_DIRECTION) == IB_SMP_DIRECTION);
+}
+
+#endif /* IB_SMI_H */
-
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