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 #include <rdma/opa_smi.h>
  45
  46 #define IB_MAD_QPS_CORE         2 /* Always QP0 and QP1 as a minimum */
  47
  48 /* QP and CQ parameters */
  49 #define IB_MAD_QP_SEND_SIZE     128
  50 #define IB_MAD_QP_RECV_SIZE     512
  51 #define IB_MAD_QP_MIN_SIZE      64
  52 #define IB_MAD_QP_MAX_SIZE      8192
  53 #define IB_MAD_SEND_REQ_MAX_SG  2
  54 #define IB_MAD_RECV_REQ_MAX_SG  1
  55
  56 #define IB_MAD_SEND_Q_PSN       0
  57
  58 /* Registration table sizes */
  59 #define MAX_MGMT_CLASS          80
  60 #define MAX_MGMT_VERSION        0x83
  61 #define MAX_MGMT_OUI            8
  62 #define MAX_MGMT_VENDOR_RANGE2  (IB_MGMT_CLASS_VENDOR_RANGE2_END - \
  63                                 IB_MGMT_CLASS_VENDOR_RANGE2_START + 1)
  64
  65 struct ib_mad_list_head {
  66         struct list_head list;
  67         struct ib_cqe cqe;
  68         struct ib_mad_queue *mad_queue;
  69 };
  70
  71 struct ib_mad_private_header {
  72         struct ib_mad_list_head mad_list;
  73         struct ib_mad_recv_wc recv_wc;
  74         struct ib_wc wc;
  75         u64 mapping;
  76 } __attribute__ ((packed));
  77
  78 struct ib_mad_private {
  79         struct ib_mad_private_header header;
  80         size_t mad_size;
  81         struct ib_grh grh;
  82         u8 mad[0];
  83 } __attribute__ ((packed));
  84
  85 struct ib_rmpp_segment {
  86         struct list_head list;
  87         u32 num;
  88         u8 data[0];
  89 };
  90
  91 struct ib_mad_agent_private {
  92         struct list_head agent_list;
  93         struct ib_mad_agent agent;
  94         struct ib_mad_reg_req *reg_req;
  95         struct ib_mad_qp_info *qp_info;
  96
  97         spinlock_t lock;
  98         struct list_head send_list;
  99         struct list_head wait_list;
 100         struct list_head done_list;
 101         struct delayed_work timed_work;
 102         unsigned long timeout;
 103         struct list_head local_list;
 104         struct work_struct local_work;
 105         struct list_head rmpp_list;
 106
 107         atomic_t refcount;
 108         struct completion comp;
 109 };
 110
 111 struct ib_mad_snoop_private {
 112         struct ib_mad_agent agent;
 113         struct ib_mad_qp_info *qp_info;
 114         int snoop_index;
 115         int mad_snoop_flags;
 116         atomic_t refcount;
 117         struct completion comp;
 118 };
 119
 120 struct ib_mad_send_wr_private {
 121         struct ib_mad_list_head mad_list;
 122         struct list_head agent_list;
 123         struct ib_mad_agent_private *mad_agent_priv;
 124         struct ib_mad_send_buf send_buf;
 125         u64 header_mapping;
 126         u64 payload_mapping;
 127         struct ib_ud_wr send_wr;
 128         struct ib_sge sg_list[IB_MAD_SEND_REQ_MAX_SG];
 129         __be64 tid;
 130         unsigned long timeout;
 131         int max_retries;
 132         int retries_left;
 133         int retry;
 134         int refcount;
 135         enum ib_wc_status status;
 136
 137         /* RMPP control */
 138         struct list_head rmpp_list;
 139         struct ib_rmpp_segment *last_ack_seg;
 140         struct ib_rmpp_segment *cur_seg;
 141         int last_ack;
 142         int seg_num;
 143         int newwin;
 144         int pad;
 145 };
 146
 147 struct ib_mad_local_private {
 148         struct list_head completion_list;
 149         struct ib_mad_private *mad_priv;
 150         struct ib_mad_agent_private *recv_mad_agent;
 151         struct ib_mad_send_wr_private *mad_send_wr;
 152         size_t return_wc_byte_len;
 153 };
 154
 155 struct ib_mad_mgmt_method_table {
 156         struct ib_mad_agent_private *agent[IB_MGMT_MAX_METHODS];
 157 };
 158
 159 struct ib_mad_mgmt_class_table {
 160         struct ib_mad_mgmt_method_table *method_table[MAX_MGMT_CLASS];
 161 };
 162
 163 struct ib_mad_mgmt_vendor_class {
 164         u8      oui[MAX_MGMT_OUI][3];
 165         struct ib_mad_mgmt_method_table *method_table[MAX_MGMT_OUI];
 166 };
 167
 168 struct ib_mad_mgmt_vendor_class_table {
 169         struct ib_mad_mgmt_vendor_class *vendor_class[MAX_MGMT_VENDOR_RANGE2];
 170 };
 171
 172 struct ib_mad_mgmt_version_table {
 173         struct ib_mad_mgmt_class_table *class;
 174         struct ib_mad_mgmt_vendor_class_table *vendor;
 175 };
 176
 177 struct ib_mad_queue {
 178         spinlock_t lock;
 179         struct list_head list;
 180         int count;
 181         int max_active;
 182         struct ib_mad_qp_info *qp_info;
 183 };
 184
 185 struct ib_mad_qp_info {
 186         struct ib_mad_port_private *port_priv;
 187         struct ib_qp *qp;
 188         struct ib_mad_queue send_queue;
 189         struct ib_mad_queue recv_queue;
 190         struct list_head overflow_list;
 191         spinlock_t snoop_lock;
 192         struct ib_mad_snoop_private **snoop_table;
 193         int snoop_table_size;
 194         atomic_t snoop_count;
 195 };
 196
 197 struct ib_mad_port_private {
 198         struct list_head port_list;
 199         struct ib_device *device;
 200         int port_num;
 201         struct ib_cq *cq;
 202         struct ib_pd *pd;
 203
 204         spinlock_t reg_lock;
 205         struct ib_mad_mgmt_version_table version[MAX_MGMT_VERSION];
 206         struct list_head agent_list;
 207         struct workqueue_struct *wq;
 208         struct ib_mad_qp_info qp_info[IB_MAD_QPS_CORE];
 209 };
 210
 211 int ib_send_mad(struct ib_mad_send_wr_private *mad_send_wr);
 212
 213 struct ib_mad_send_wr_private *
 214 ib_find_send_mad(const struct ib_mad_agent_private *mad_agent_priv,
 215                  const struct ib_mad_recv_wc *mad_recv_wc);
 216
 217 void ib_mad_complete_send_wr(struct ib_mad_send_wr_private *mad_send_wr,
 218                              struct ib_mad_send_wc *mad_send_wc);
 219
 220 void ib_mark_mad_done(struct ib_mad_send_wr_private *mad_send_wr);
 221
 222 void ib_reset_mad_timeout(struct ib_mad_send_wr_private *mad_send_wr,
 223                           int timeout_ms);
 224
 225 #endif  /* __IB_MAD_PRIV_H__ */