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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#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
65struct ib_mad_list_head {
66 struct list_head list;
67 struct ib_cqe cqe;
68 struct ib_mad_queue *mad_queue;
69};
70
71struct 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} __packed;
77
78struct ib_mad_private {
79 struct ib_mad_private_header header;
80 size_t mad_size;
81 struct ib_grh grh;
82 u8 mad[];
83} __packed;
84
85struct ib_rmpp_segment {
86 struct list_head list;
87 u32 num;
88 u8 data[];
89};
90
91struct ib_mad_agent_private {
92 struct ib_mad_agent agent;
93 struct ib_mad_reg_req *reg_req;
94 struct ib_mad_qp_info *qp_info;
95
96 spinlock_t lock;
97 struct list_head send_list;
98 unsigned int sol_fc_send_count;
99 struct list_head wait_list;
100 unsigned int sol_fc_wait_count;
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 unsigned int sol_fc_max;
107 struct list_head backlog_list;
108
109 refcount_t refcount;
110 union {
111 struct completion comp;
112 struct rcu_head rcu;
113 };
114};
115
116struct ib_mad_snoop_private {
117 struct ib_mad_agent agent;
118 struct ib_mad_qp_info *qp_info;
119 int snoop_index;
120 int mad_snoop_flags;
121 struct completion comp;
122};
123
124enum ib_mad_state {
125 /* MAD is in the making and is not yet in any list */
126 IB_MAD_STATE_INIT,
127 /* MAD is in backlog list */
128 IB_MAD_STATE_QUEUED,
129 /*
130 * MAD was sent to the QP and is waiting for completion
131 * notification in send list.
132 */
133 IB_MAD_STATE_SEND_START,
134 /*
135 * MAD send completed successfully, waiting for a response
136 * in wait list.
137 */
138 IB_MAD_STATE_WAIT_RESP,
139 /*
140 * Response came early, before send completion notification,
141 * in send list.
142 */
143 IB_MAD_STATE_EARLY_RESP,
144 /* MAD was canceled while in wait or send list */
145 IB_MAD_STATE_CANCELED,
146 /* MAD processing completed, MAD in no list */
147 IB_MAD_STATE_DONE
148};
149
150struct ib_mad_send_wr_private {
151 struct ib_mad_list_head mad_list;
152 struct list_head agent_list;
153 struct ib_mad_agent_private *mad_agent_priv;
154 struct ib_mad_send_buf send_buf;
155 u64 header_mapping;
156 u64 payload_mapping;
157 struct ib_ud_wr send_wr;
158 struct ib_sge sg_list[IB_MAD_SEND_REQ_MAX_SG];
159 __be64 tid;
160 unsigned long timeout;
161 int max_retries;
162 int retries_left;
163 int retry;
164
165 /* RMPP control */
166 struct list_head rmpp_list;
167 struct ib_rmpp_segment *last_ack_seg;
168 struct ib_rmpp_segment *cur_seg;
169 int last_ack;
170 int seg_num;
171 int newwin;
172 int pad;
173
174 enum ib_mad_state state;
175
176 /* Solicited MAD flow control */
177 bool is_solicited_fc;
178};
179
180static inline void expect_mad_state(struct ib_mad_send_wr_private *mad_send_wr,
181 enum ib_mad_state expected_state)
182{
183 if (IS_ENABLED(CONFIG_LOCKDEP))
184 WARN_ON(mad_send_wr->state != expected_state);
185}
186
187static inline void expect_mad_state2(struct ib_mad_send_wr_private *mad_send_wr,
188 enum ib_mad_state expected_state1,
189 enum ib_mad_state expected_state2)
190{
191 if (IS_ENABLED(CONFIG_LOCKDEP))
192 WARN_ON(mad_send_wr->state != expected_state1 &&
193 mad_send_wr->state != expected_state2);
194}
195
196static inline void expect_mad_state3(struct ib_mad_send_wr_private *mad_send_wr,
197 enum ib_mad_state expected_state1,
198 enum ib_mad_state expected_state2,
199 enum ib_mad_state expected_state3)
200{
201 if (IS_ENABLED(CONFIG_LOCKDEP))
202 WARN_ON(mad_send_wr->state != expected_state1 &&
203 mad_send_wr->state != expected_state2 &&
204 mad_send_wr->state != expected_state3);
205}
206
207static inline void
208not_expect_mad_state(struct ib_mad_send_wr_private *mad_send_wr,
209 enum ib_mad_state wrong_state)
210{
211 if (IS_ENABLED(CONFIG_LOCKDEP))
212 WARN_ON(mad_send_wr->state == wrong_state);
213}
214
215struct ib_mad_local_private {
216 struct list_head completion_list;
217 struct ib_mad_private *mad_priv;
218 struct ib_mad_agent_private *recv_mad_agent;
219 struct ib_mad_send_wr_private *mad_send_wr;
220 size_t return_wc_byte_len;
221};
222
223struct ib_mad_mgmt_method_table {
224 struct ib_mad_agent_private *agent[IB_MGMT_MAX_METHODS];
225};
226
227struct ib_mad_mgmt_class_table {
228 struct ib_mad_mgmt_method_table *method_table[MAX_MGMT_CLASS];
229};
230
231struct ib_mad_mgmt_vendor_class {
232 u8 oui[MAX_MGMT_OUI][3];
233 struct ib_mad_mgmt_method_table *method_table[MAX_MGMT_OUI];
234};
235
236struct ib_mad_mgmt_vendor_class_table {
237 struct ib_mad_mgmt_vendor_class *vendor_class[MAX_MGMT_VENDOR_RANGE2];
238};
239
240struct ib_mad_mgmt_version_table {
241 struct ib_mad_mgmt_class_table *class;
242 struct ib_mad_mgmt_vendor_class_table *vendor;
243};
244
245struct ib_mad_queue {
246 spinlock_t lock;
247 struct list_head list;
248 int count;
249 int max_active;
250 struct ib_mad_qp_info *qp_info;
251};
252
253struct ib_mad_qp_info {
254 struct ib_mad_port_private *port_priv;
255 struct ib_qp *qp;
256 struct ib_mad_queue send_queue;
257 struct ib_mad_queue recv_queue;
258 struct list_head overflow_list;
259 spinlock_t snoop_lock;
260 struct ib_mad_snoop_private **snoop_table;
261 int snoop_table_size;
262 atomic_t snoop_count;
263};
264
265struct ib_mad_port_private {
266 struct list_head port_list;
267 struct ib_device *device;
268 int port_num;
269 struct ib_cq *cq;
270 struct ib_pd *pd;
271
272 spinlock_t reg_lock;
273 struct ib_mad_mgmt_version_table version[MAX_MGMT_VERSION];
274 struct workqueue_struct *wq;
275 struct ib_mad_qp_info qp_info[IB_MAD_QPS_CORE];
276};
277
278int ib_send_mad(struct ib_mad_send_wr_private *mad_send_wr);
279
280struct ib_mad_send_wr_private *
281ib_find_send_mad(const struct ib_mad_agent_private *mad_agent_priv,
282 const struct ib_mad_recv_wc *mad_recv_wc);
283
284void ib_mad_complete_send_wr(struct ib_mad_send_wr_private *mad_send_wr,
285 struct ib_mad_send_wc *mad_send_wc);
286
287void ib_mark_mad_done(struct ib_mad_send_wr_private *mad_send_wr);
288
289void ib_reset_mad_timeout(struct ib_mad_send_wr_private *mad_send_wr,
290 unsigned long timeout_ms);
291
292void change_mad_state(struct ib_mad_send_wr_private *mad_send_wr,
293 enum ib_mad_state new_state);
294
295#endif /* __IB_MAD_PRIV_H__ */