text: /*
   * Copyright (c) 2004 Topspin Communications.  All rights reserved.
   * Copyright (c) 2005 Voltaire, Inc.  All rights reserved.
   * Copyright (c) 2006 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.
   */
  
  #ifndef IB_SA_H
  #define IB_SA_H
  
  #include <linux/completion.h>
  #include <linux/compiler.h>
  
  #include <linux/atomic.h>
  #include <linux/netdevice.h>
  
  #include <rdma/ib_verbs.h>
  #include <rdma/ib_mad.h>
  
  enum {
  	IB_SA_CLASS_VERSION		= 2,	/* IB spec version 1.1/1.2 */
  
  	IB_SA_METHOD_GET_TABLE		= 0x12,
  	IB_SA_METHOD_GET_TABLE_RESP	= 0x92,
  	IB_SA_METHOD_DELETE		= 0x15,
  	IB_SA_METHOD_DELETE_RESP	= 0x95,
  	IB_SA_METHOD_GET_MULTI		= 0x14,
  	IB_SA_METHOD_GET_MULTI_RESP	= 0x94,
  	IB_SA_METHOD_GET_TRACE_TBL	= 0x13
  };
  
  enum {
  	IB_SA_ATTR_CLASS_PORTINFO    = 0x01,
  	IB_SA_ATTR_NOTICE	     = 0x02,
  	IB_SA_ATTR_INFORM_INFO	     = 0x03,
  	IB_SA_ATTR_NODE_REC	     = 0x11,
  	IB_SA_ATTR_PORT_INFO_REC     = 0x12,
  	IB_SA_ATTR_SL2VL_REC	     = 0x13,
  	IB_SA_ATTR_SWITCH_REC	     = 0x14,
  	IB_SA_ATTR_LINEAR_FDB_REC    = 0x15,
  	IB_SA_ATTR_RANDOM_FDB_REC    = 0x16,
  	IB_SA_ATTR_MCAST_FDB_REC     = 0x17,
  	IB_SA_ATTR_SM_INFO_REC	     = 0x18,
  	IB_SA_ATTR_LINK_REC	     = 0x20,
  	IB_SA_ATTR_GUID_INFO_REC     = 0x30,
  	IB_SA_ATTR_SERVICE_REC	     = 0x31,
  	IB_SA_ATTR_PARTITION_REC     = 0x33,
  	IB_SA_ATTR_PATH_REC	     = 0x35,
  	IB_SA_ATTR_VL_ARB_REC	     = 0x36,
  	IB_SA_ATTR_MC_MEMBER_REC     = 0x38,
  	IB_SA_ATTR_TRACE_REC	     = 0x39,
  	IB_SA_ATTR_MULTI_PATH_REC    = 0x3a,
  	IB_SA_ATTR_SERVICE_ASSOC_REC = 0x3b,
  	IB_SA_ATTR_INFORM_INFO_REC   = 0xf3
  };
  
  enum ib_sa_selector {
  	IB_SA_GT   = 0,
  	IB_SA_LT   = 1,
  	IB_SA_EQ   = 2,
  	/*
  	 * The meaning of "best" depends on the attribute: for
  	 * example, for MTU best will return the largest available
  	 * MTU, while for packet life time, best will return the
  	 * smallest available life time.
  	 */
  	IB_SA_BEST = 3
  };
  
  /*
   * Structures for SA records are named "struct ib_sa_xxx_rec."  No
   * attempt is made to pack structures to match the physical layout of
   * SA records in SA MADs; all packing and unpacking is handled by the
   * SA query code.
   *
   * For a record with structure ib_sa_xxx_rec, the naming convention
   * for the component mask value for field yyy is IB_SA_XXX_REC_YYY (we
   * never use different abbreviations or otherwise change the spelling
   * of xxx/yyy between ib_sa_xxx_rec.yyy and IB_SA_XXX_REC_YYY).
   *
   * Reserved rows are indicated with comments to help maintainability.
   */
  
  #define IB_SA_PATH_REC_SERVICE_ID		       (IB_SA_COMP_MASK( 0) |\
  							IB_SA_COMP_MASK( 1))
  #define IB_SA_PATH_REC_DGID				IB_SA_COMP_MASK( 2)
  #define IB_SA_PATH_REC_SGID				IB_SA_COMP_MASK( 3)
  #define IB_SA_PATH_REC_DLID				IB_SA_COMP_MASK( 4)
  #define IB_SA_PATH_REC_SLID				IB_SA_COMP_MASK( 5)
  #define IB_SA_PATH_REC_RAW_TRAFFIC			IB_SA_COMP_MASK( 6)
  /* reserved:								 7 */
  #define IB_SA_PATH_REC_FLOW_LABEL       		IB_SA_COMP_MASK( 8)
  #define IB_SA_PATH_REC_HOP_LIMIT			IB_SA_COMP_MASK( 9)
  #define IB_SA_PATH_REC_TRAFFIC_CLASS			IB_SA_COMP_MASK(10)
  #define IB_SA_PATH_REC_REVERSIBLE			IB_SA_COMP_MASK(11)
  #define IB_SA_PATH_REC_NUMB_PATH			IB_SA_COMP_MASK(12)
  #define IB_SA_PATH_REC_PKEY				IB_SA_COMP_MASK(13)
  #define IB_SA_PATH_REC_QOS_CLASS			IB_SA_COMP_MASK(14)
  #define IB_SA_PATH_REC_SL				IB_SA_COMP_MASK(15)
  #define IB_SA_PATH_REC_MTU_SELECTOR			IB_SA_COMP_MASK(16)
  #define IB_SA_PATH_REC_MTU				IB_SA_COMP_MASK(17)
  #define IB_SA_PATH_REC_RATE_SELECTOR			IB_SA_COMP_MASK(18)
  #define IB_SA_PATH_REC_RATE				IB_SA_COMP_MASK(19)
  #define IB_SA_PATH_REC_PACKET_LIFE_TIME_SELECTOR	IB_SA_COMP_MASK(20)
  #define IB_SA_PATH_REC_PACKET_LIFE_TIME			IB_SA_COMP_MASK(21)
  #define IB_SA_PATH_REC_PREFERENCE			IB_SA_COMP_MASK(22)
  
  struct ib_sa_path_rec {
  	__be64       service_id;
  	union ib_gid dgid;
  	union ib_gid sgid;
  	__be16       dlid;
  	__be16       slid;
  	int          raw_traffic;
  	/* reserved */
  	__be32       flow_label;
  	u8           hop_limit;
  	u8           traffic_class;
  	int          reversible;
  	u8           numb_path;
  	__be16       pkey;
  	__be16       qos_class;
  	u8           sl;
  	u8           mtu_selector;
  	u8           mtu;
  	u8           rate_selector;
  	u8           rate;
  	u8           packet_life_time_selector;
  	u8           packet_life_time;
  	u8           preference;
  	u8           dmac[ETH_ALEN];
  	/* ignored in IB */
  	int	     ifindex;
  	/* ignored in IB */
  	struct net  *net;
  	enum ib_gid_type gid_type;
  };
  
  static inline struct net_device *ib_get_ndev_from_path(struct ib_sa_path_rec *rec)
  {
  	return rec->net ? dev_get_by_index(rec->net, rec->ifindex) : NULL;
  }
  
  #define IB_SA_MCMEMBER_REC_MGID				IB_SA_COMP_MASK( 0)
  #define IB_SA_MCMEMBER_REC_PORT_GID			IB_SA_COMP_MASK( 1)
  #define IB_SA_MCMEMBER_REC_QKEY				IB_SA_COMP_MASK( 2)
  #define IB_SA_MCMEMBER_REC_MLID				IB_SA_COMP_MASK( 3)
  #define IB_SA_MCMEMBER_REC_MTU_SELECTOR			IB_SA_COMP_MASK( 4)
  #define IB_SA_MCMEMBER_REC_MTU				IB_SA_COMP_MASK( 5)
  #define IB_SA_MCMEMBER_REC_TRAFFIC_CLASS		IB_SA_COMP_MASK( 6)
  #define IB_SA_MCMEMBER_REC_PKEY				IB_SA_COMP_MASK( 7)
  #define IB_SA_MCMEMBER_REC_RATE_SELECTOR		IB_SA_COMP_MASK( 8)
  #define IB_SA_MCMEMBER_REC_RATE				IB_SA_COMP_MASK( 9)
  #define IB_SA_MCMEMBER_REC_PACKET_LIFE_TIME_SELECTOR	IB_SA_COMP_MASK(10)
  #define IB_SA_MCMEMBER_REC_PACKET_LIFE_TIME		IB_SA_COMP_MASK(11)
  #define IB_SA_MCMEMBER_REC_SL				IB_SA_COMP_MASK(12)
  #define IB_SA_MCMEMBER_REC_FLOW_LABEL			IB_SA_COMP_MASK(13)
  #define IB_SA_MCMEMBER_REC_HOP_LIMIT			IB_SA_COMP_MASK(14)
  #define IB_SA_MCMEMBER_REC_SCOPE			IB_SA_COMP_MASK(15)
  #define IB_SA_MCMEMBER_REC_JOIN_STATE			IB_SA_COMP_MASK(16)
  #define IB_SA_MCMEMBER_REC_PROXY_JOIN			IB_SA_COMP_MASK(17)
  
  struct ib_sa_mcmember_rec {
  	union ib_gid mgid;
  	union ib_gid port_gid;
  	__be32       qkey;
  	__be16       mlid;
  	u8           mtu_selector;
  	u8           mtu;
  	u8           traffic_class;
  	__be16       pkey;
  	u8 	     rate_selector;
  	u8 	     rate;
  	u8 	     packet_life_time_selector;
  	u8 	     packet_life_time;
  	u8           sl;
  	__be32       flow_label;
  	u8           hop_limit;
  	u8           scope;
  	u8           join_state;
  	int          proxy_join;
  };
  
  /* Service Record Component Mask Sec 15.2.5.14 Ver 1.1	*/
  #define IB_SA_SERVICE_REC_SERVICE_ID			IB_SA_COMP_MASK( 0)
  #define IB_SA_SERVICE_REC_SERVICE_GID			IB_SA_COMP_MASK( 1)
  #define IB_SA_SERVICE_REC_SERVICE_PKEY			IB_SA_COMP_MASK( 2)
  /* reserved:								 3 */
  #define IB_SA_SERVICE_REC_SERVICE_LEASE			IB_SA_COMP_MASK( 4)
  #define IB_SA_SERVICE_REC_SERVICE_KEY			IB_SA_COMP_MASK( 5)
  #define IB_SA_SERVICE_REC_SERVICE_NAME			IB_SA_COMP_MASK( 6)
  #define IB_SA_SERVICE_REC_SERVICE_DATA8_0		IB_SA_COMP_MASK( 7)
  #define IB_SA_SERVICE_REC_SERVICE_DATA8_1		IB_SA_COMP_MASK( 8)
  #define IB_SA_SERVICE_REC_SERVICE_DATA8_2		IB_SA_COMP_MASK( 9)
  #define IB_SA_SERVICE_REC_SERVICE_DATA8_3		IB_SA_COMP_MASK(10)
  #define IB_SA_SERVICE_REC_SERVICE_DATA8_4		IB_SA_COMP_MASK(11)
  #define IB_SA_SERVICE_REC_SERVICE_DATA8_5		IB_SA_COMP_MASK(12)
  #define IB_SA_SERVICE_REC_SERVICE_DATA8_6		IB_SA_COMP_MASK(13)
  #define IB_SA_SERVICE_REC_SERVICE_DATA8_7		IB_SA_COMP_MASK(14)
  #define IB_SA_SERVICE_REC_SERVICE_DATA8_8		IB_SA_COMP_MASK(15)
  #define IB_SA_SERVICE_REC_SERVICE_DATA8_9		IB_SA_COMP_MASK(16)
  #define IB_SA_SERVICE_REC_SERVICE_DATA8_10		IB_SA_COMP_MASK(17)
  #define IB_SA_SERVICE_REC_SERVICE_DATA8_11		IB_SA_COMP_MASK(18)
  #define IB_SA_SERVICE_REC_SERVICE_DATA8_12		IB_SA_COMP_MASK(19)
  #define IB_SA_SERVICE_REC_SERVICE_DATA8_13		IB_SA_COMP_MASK(20)
  #define IB_SA_SERVICE_REC_SERVICE_DATA8_14		IB_SA_COMP_MASK(21)
  #define IB_SA_SERVICE_REC_SERVICE_DATA8_15		IB_SA_COMP_MASK(22)
  #define IB_SA_SERVICE_REC_SERVICE_DATA16_0		IB_SA_COMP_MASK(23)
  #define IB_SA_SERVICE_REC_SERVICE_DATA16_1		IB_SA_COMP_MASK(24)
  #define IB_SA_SERVICE_REC_SERVICE_DATA16_2		IB_SA_COMP_MASK(25)
  #define IB_SA_SERVICE_REC_SERVICE_DATA16_3		IB_SA_COMP_MASK(26)
  #define IB_SA_SERVICE_REC_SERVICE_DATA16_4		IB_SA_COMP_MASK(27)
  #define IB_SA_SERVICE_REC_SERVICE_DATA16_5		IB_SA_COMP_MASK(28)
  #define IB_SA_SERVICE_REC_SERVICE_DATA16_6		IB_SA_COMP_MASK(29)
  #define IB_SA_SERVICE_REC_SERVICE_DATA16_7		IB_SA_COMP_MASK(30)
  #define IB_SA_SERVICE_REC_SERVICE_DATA32_0		IB_SA_COMP_MASK(31)
  #define IB_SA_SERVICE_REC_SERVICE_DATA32_1		IB_SA_COMP_MASK(32)
  #define IB_SA_SERVICE_REC_SERVICE_DATA32_2		IB_SA_COMP_MASK(33)
  #define IB_SA_SERVICE_REC_SERVICE_DATA32_3		IB_SA_COMP_MASK(34)
  #define IB_SA_SERVICE_REC_SERVICE_DATA64_0		IB_SA_COMP_MASK(35)
  #define IB_SA_SERVICE_REC_SERVICE_DATA64_1		IB_SA_COMP_MASK(36)
  
  #define IB_DEFAULT_SERVICE_LEASE 	0xFFFFFFFF
  
  struct ib_sa_service_rec {
  	u64		id;
  	union ib_gid	gid;
  	__be16 		pkey;
  	/* reserved */
  	u32		lease;
  	u8		key[16];
  	u8		name[64];
  	u8		data8[16];
  	u16		data16[8];
  	u32		data32[4];
  	u64		data64[2];
  };
  
  #define IB_SA_GUIDINFO_REC_LID		IB_SA_COMP_MASK(0)
  #define IB_SA_GUIDINFO_REC_BLOCK_NUM	IB_SA_COMP_MASK(1)
  #define IB_SA_GUIDINFO_REC_RES1		IB_SA_COMP_MASK(2)
  #define IB_SA_GUIDINFO_REC_RES2		IB_SA_COMP_MASK(3)
  #define IB_SA_GUIDINFO_REC_GID0		IB_SA_COMP_MASK(4)
  #define IB_SA_GUIDINFO_REC_GID1		IB_SA_COMP_MASK(5)
  #define IB_SA_GUIDINFO_REC_GID2		IB_SA_COMP_MASK(6)
  #define IB_SA_GUIDINFO_REC_GID3		IB_SA_COMP_MASK(7)
  #define IB_SA_GUIDINFO_REC_GID4		IB_SA_COMP_MASK(8)
  #define IB_SA_GUIDINFO_REC_GID5		IB_SA_COMP_MASK(9)
  #define IB_SA_GUIDINFO_REC_GID6		IB_SA_COMP_MASK(10)
  #define IB_SA_GUIDINFO_REC_GID7		IB_SA_COMP_MASK(11)
  
  struct ib_sa_guidinfo_rec {
  	__be16	lid;
  	u8	block_num;
  	/* reserved */
  	u8	res1;
  	__be32	res2;
  	u8	guid_info_list[64];
  };
  
  struct ib_sa_client {
  	atomic_t users;
  	struct completion comp;
  };
  
  /**
   * ib_sa_register_client - Register an SA client.
   */
  void ib_sa_register_client(struct ib_sa_client *client);
  
  /**
   * ib_sa_unregister_client - Deregister an SA client.
   * @client: Client object to deregister.
   */
  void ib_sa_unregister_client(struct ib_sa_client *client);
  
  struct ib_sa_query;
  
  void ib_sa_cancel_query(int id, struct ib_sa_query *query);
  
  int ib_sa_path_rec_get(struct ib_sa_client *client,
  		       struct ib_device *device, u8 port_num,
  		       struct ib_sa_path_rec *rec,
  		       ib_sa_comp_mask comp_mask,
  		       int timeout_ms, gfp_t gfp_mask,
  		       void (*callback)(int status,
  					struct ib_sa_path_rec *resp,
  					void *context),
  		       void *context,
  		       struct ib_sa_query **query);
  
  int ib_sa_service_rec_query(struct ib_sa_client *client,
  			 struct ib_device *device, u8 port_num,
  			 u8 method,
  			 struct ib_sa_service_rec *rec,
  			 ib_sa_comp_mask comp_mask,
  			 int timeout_ms, gfp_t gfp_mask,
  			 void (*callback)(int status,
  					  struct ib_sa_service_rec *resp,
  					  void *context),
  			 void *context,
  			 struct ib_sa_query **sa_query);
  
  struct ib_sa_multicast {
  	struct ib_sa_mcmember_rec rec;
  	ib_sa_comp_mask		comp_mask;
  	int			(*callback)(int status,
  					    struct ib_sa_multicast *multicast);
  	void			*context;
  };
  
  /**
   * ib_sa_join_multicast - Initiates a join request to the specified multicast
   *   group.
   * @client: SA client
   * @device: Device associated with the multicast group.
   * @port_num: Port on the specified device to associate with the multicast
   *   group.
   * @rec: SA multicast member record specifying group attributes.
   * @comp_mask: Component mask indicating which group attributes of %rec are
   *   valid.
   * @gfp_mask: GFP mask for memory allocations.
   * @callback: User callback invoked once the join operation completes.
   * @context: User specified context stored with the ib_sa_multicast structure.
   *
   * This call initiates a multicast join request with the SA for the specified
   * multicast group.  If the join operation is started successfully, it returns
   * an ib_sa_multicast structure that is used to track the multicast operation.
   * Users must free this structure by calling ib_free_multicast, even if the
   * join operation later fails.  (The callback status is non-zero.)
   *
   * If the join operation fails; status will be non-zero, with the following
   * failures possible:
   * -ETIMEDOUT: The request timed out.
   * -EIO: An error occurred sending the query.
   * -EINVAL: The MCMemberRecord values differed from the existing group's.
   * -ENETRESET: Indicates that an fatal error has occurred on the multicast
   *   group, and the user must rejoin the group to continue using it.
   */
  struct ib_sa_multicast *ib_sa_join_multicast(struct ib_sa_client *client,
  					     struct ib_device *device, u8 port_num,
  					     struct ib_sa_mcmember_rec *rec,
  					     ib_sa_comp_mask comp_mask, gfp_t gfp_mask,
  					     int (*callback)(int status,
  							     struct ib_sa_multicast
  								    *multicast),
  					     void *context);
  
  /**
   * ib_free_multicast - Frees the multicast tracking structure, and releases
   *    any reference on the multicast group.
   * @multicast: Multicast tracking structure allocated by ib_join_multicast.
   *
   * This call blocks until the multicast identifier is destroyed.  It may
   * not be called from within the multicast callback; however, returning a non-
   * zero value from the callback will result in destroying the multicast
   * tracking structure.
   */
  void ib_sa_free_multicast(struct ib_sa_multicast *multicast);
  
  /**
   * ib_get_mcmember_rec - Looks up a multicast member record by its MGID and
   *   returns it if found.
   * @device: Device associated with the multicast group.
   * @port_num: Port on the specified device to associate with the multicast
   *   group.
   * @mgid: MGID of multicast group.
   * @rec: Location to copy SA multicast member record.
   */
  int ib_sa_get_mcmember_rec(struct ib_device *device, u8 port_num,
  			   union ib_gid *mgid, struct ib_sa_mcmember_rec *rec);
  
  /**
   * ib_init_ah_from_mcmember - Initialize address handle attributes based on
   * an SA multicast member record.
   */
  int ib_init_ah_from_mcmember(struct ib_device *device, u8 port_num,
  			     struct ib_sa_mcmember_rec *rec,
  			     struct net_device *ndev,
  			     enum ib_gid_type gid_type,
  			     struct ib_ah_attr *ah_attr);
  
  /**
   * ib_init_ah_from_path - Initialize address handle attributes based on an SA
   *   path record.
   */
  int ib_init_ah_from_path(struct ib_device *device, u8 port_num,
  			 struct ib_sa_path_rec *rec,
  			 struct ib_ah_attr *ah_attr);
  
  /**
   * ib_sa_pack_path - Conert a path record from struct ib_sa_path_rec
   * to IB MAD wire format.
   */
  void ib_sa_pack_path(struct ib_sa_path_rec *rec, void *attribute);
  
  /**
   * ib_sa_unpack_path - Convert a path record from MAD format to struct
   * ib_sa_path_rec.
   */
  void ib_sa_unpack_path(void *attribute, struct ib_sa_path_rec *rec);
  
  /* Support GuidInfoRecord */
  int ib_sa_guid_info_rec_query(struct ib_sa_client *client,
  			      struct ib_device *device, u8 port_num,
  			      struct ib_sa_guidinfo_rec *rec,
  			      ib_sa_comp_mask comp_mask, u8 method,
  			      int timeout_ms, gfp_t gfp_mask,
  			      void (*callback)(int status,
  					       struct ib_sa_guidinfo_rec *resp,
  					       void *context),
  			      void *context,
  			      struct ib_sa_query **sa_query);
  
  #endif /* IB_SA_H */
  