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Diffstat (limited to 'include/rdma/ib_mad.h')
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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 00000000000..fc6b1c18ffc --- /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 */ |