drivers/infiniband/core/mad_priv.h

   1 /*
   2  * Copyright (c) 2004, 2005, Voltaire, Inc. All rights reserved.
   3  * Copyright (c) 2005 Intel Corporation. All rights reserved.
   4  * Copyright (c) 2005 Sun Microsystems, Inc. All rights reserved.
   5  * Copyright (c) 2009 HNR Consulting. All rights reserved.
   6  *
   7  * This software is available to you under a choice of one of two
   8  * licenses.  You may choose to be licensed under the terms of the GNU
   9  * General Public License (GPL) Version 2, available from the file
  10  * COPYING in the main directory of this source tree, or the
  11  * OpenIB.org BSD license below:
  12  *
  13  *     Redistribution and use in source and binary forms, with or
  14  *     without modification, are permitted provided that the following
  15  *     conditions are met:
  16  *
  17  *      - Redistributions of source code must retain the above
  18  *        copyright notice, this list of conditions and the following
  19  *        disclaimer.
  20  *
  21  *      - Redistributions in binary form must reproduce the above
  22  *        copyright notice, this list of conditions and the following
  23  *        disclaimer in the documentation and/or other materials
  24  *        provided with the distribution.
  25  *
  26  * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
  27  * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
  28  * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
  29  * NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS
  30  * BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN
  31  * ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
  32  * CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
  33  * SOFTWARE.
  34  */
  35
  36 #ifndef __IB_MAD_PRIV_H__
  37 #define __IB_MAD_PRIV_H__
  38
  39 #include <linux/completion.h>
  40 #include <linux/err.h>
  41 #include <linux/workqueue.h>
  42 #include <rdma/ib_mad.h>
  43 #include <rdma/ib_smi.h>
  44
  45
  46 #define PFX "ib_mad: "
  47
  48 #define IB_MAD_QPS_CORE         2 /* Always QP0 and QP1 as a minimum */
  49
  50 /* QP and CQ parameters */
  51 #define IB_MAD_QP_SEND_SIZE     128
  52 #define IB_MAD_QP_RECV_SIZE     512
  53 #define IB_MAD_QP_MIN_SIZE      64
  54 #define IB_MAD_QP_MAX_SIZE      8192
  55 #define IB_MAD_SEND_REQ_MAX_SG  2
  56 #define IB_MAD_RECV_REQ_MAX_SG  1
  57
  58 #define IB_MAD_SEND_Q_PSN       0
  59
  60 /* Registration table sizes */
  61 #define MAX_MGMT_CLASS          80
  62 #define MAX_MGMT_VERSION        8
  63 #define MAX_MGMT_OUI            8
  64 #define MAX_MGMT_VENDOR_RANGE2  (IB_MGMT_CLASS_VENDOR_RANGE2_END - \
  65                                 IB_MGMT_CLASS_VENDOR_RANGE2_START + 1)
  66
  67 struct ib_mad_list_head {
  68         struct list_head list;
  69         struct ib_mad_queue *mad_queue;
  70 };
  71
  72 struct ib_mad_private_header {
  73         struct ib_mad_list_head mad_list;
  74         struct ib_mad_recv_wc recv_wc;
  75         struct ib_wc wc;
  76         u64 mapping;
  77 } __attribute__ ((packed));
  78
  79 struct ib_mad_private {
  80         struct ib_mad_private_header header;
  81         struct ib_grh grh;
  82         union {
  83                 struct ib_mad mad;
  84                 struct ib_rmpp_mad rmpp_mad;
  85                 struct ib_smp smp;
  86         } mad;
  87 } __attribute__ ((packed));
  88
  89 struct ib_rmpp_segment {
  90         struct list_head list;
  91         u32 num;
  92         u8 data[0];
  93 };
  94
  95 struct ib_mad_agent_private {
  96         struct list_head agent_list;
  97         struct ib_mad_agent agent;
  98         struct ib_mad_reg_req *reg_req;
  99         struct ib_mad_qp_info *qp_info;
 100
 101         spinlock_t lock;
 102         struct list_head send_list;
 103         struct list_head wait_list;
 104         struct list_head done_list;
 105         struct delayed_work timed_work;
 106         unsigned long timeout;
 107         struct list_head local_list;
 108         struct work_struct local_work;
 109         struct list_head rmpp_list;
 110
 111         atomic_t refcount;
 112         struct completion comp;
 113 };
 114
 115 struct ib_mad_snoop_private {
 116         struct ib_mad_agent agent;
 117         struct ib_mad_qp_info *qp_info;
 118         int snoop_index;
 119         int mad_snoop_flags;
 120         atomic_t refcount;
 121         struct completion comp;
 122 };
 123
 124 struct ib_mad_send_wr_private {
 125         struct ib_mad_list_head mad_list;
 126         struct list_head agent_list;
 127         struct ib_mad_agent_private *mad_agent_priv;
 128         struct ib_mad_send_buf send_buf;
 129         u64 header_mapping;
 130         u64 payload_mapping;
 131         struct ib_send_wr send_wr;
 132         struct ib_sge sg_list[IB_MAD_SEND_REQ_MAX_SG];
 133         __be64 tid;
 134         unsigned long timeout;
 135         int max_retries;
 136         int retries_left;
 137         int retry;
 138         int refcount;
 139         enum ib_wc_status status;
 140
 141         /* RMPP control */
 142         struct list_head rmpp_list;
 143         struct ib_rmpp_segment *last_ack_seg;
 144         struct ib_rmpp_segment *cur_seg;
 145         int last_ack;
 146         int seg_num;
 147         int newwin;
 148         int pad;
 149 };
 150
 151 struct ib_mad_local_private {
 152         struct list_head completion_list;
 153         struct ib_mad_private *mad_priv;
 154         struct ib_mad_agent_private *recv_mad_agent;
 155         struct ib_mad_send_wr_private *mad_send_wr;
 156 };
 157
 158 struct ib_mad_mgmt_method_table {
 159         struct ib_mad_agent_private *agent[IB_MGMT_MAX_METHODS];
 160 };
 161
 162 struct ib_mad_mgmt_class_table {
 163         struct ib_mad_mgmt_method_table *method_table[MAX_MGMT_CLASS];
 164 };
 165
 166 struct ib_mad_mgmt_vendor_class {
 167         u8      oui[MAX_MGMT_OUI][3];
 168         struct ib_mad_mgmt_method_table *method_table[MAX_MGMT_OUI];
 169 };
 170
 171 struct ib_mad_mgmt_vendor_class_table {
 172         struct ib_mad_mgmt_vendor_class *vendor_class[MAX_MGMT_VENDOR_RANGE2];
 173 };
 174
 175 struct ib_mad_mgmt_version_table {
 176         struct ib_mad_mgmt_class_table *class;
 177         struct ib_mad_mgmt_vendor_class_table *vendor;
 178 };
 179
 180 struct ib_mad_queue {
 181         spinlock_t lock;
 182         struct list_head list;
 183         int count;
 184         int max_active;
 185         struct ib_mad_qp_info *qp_info;
 186 };
 187
 188 struct ib_mad_qp_info {
 189         struct ib_mad_port_private *port_priv;
 190         struct ib_qp *qp;
 191         struct ib_mad_queue send_queue;
 192         struct ib_mad_queue recv_queue;
 193         struct list_head overflow_list;
 194         spinlock_t snoop_lock;
 195         struct ib_mad_snoop_private **snoop_table;
 196         int snoop_table_size;
 197         atomic_t snoop_count;
 198 };
 199
 200 struct ib_mad_port_private {
 201         struct list_head port_list;
 202         struct ib_device *device;
 203         int port_num;
 204         struct ib_cq *cq;
 205         struct ib_pd *pd;
 206         struct ib_mr *mr;
 207
 208         spinlock_t reg_lock;
 209         struct ib_mad_mgmt_version_table version[MAX_MGMT_VERSION];
 210         struct list_head agent_list;
 211         struct workqueue_struct *wq;
 212         struct work_struct work;
 213         struct ib_mad_qp_info qp_info[IB_MAD_QPS_CORE];
 214 };
 215
 216 int ib_send_mad(struct ib_mad_send_wr_private *mad_send_wr);
 217
 218 struct ib_mad_send_wr_private *
 219 ib_find_send_mad(struct ib_mad_agent_private *mad_agent_priv,
 220                  struct ib_mad_recv_wc *mad_recv_wc);
 221
 222 void ib_mad_complete_send_wr(struct ib_mad_send_wr_private *mad_send_wr,
 223                              struct ib_mad_send_wc *mad_send_wc);
 224
 225 void ib_mark_mad_done(struct ib_mad_send_wr_private *mad_send_wr);
 226
 227 void ib_reset_mad_timeout(struct ib_mad_send_wr_private *mad_send_wr,
 228                           int timeout_ms);
 229
 230 #endif  /* __IB_MAD_PRIV_H__ */