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mad_priv.h
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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__ */
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