1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
|
// SPDX-License-Identifier: GPL-2.0 OR Linux-OpenIB
/*
* Copyright (c) 2020 Hewlett Packard Enterprise, Inc. All rights reserved.
*/
#include "rxe.h"
int rxe_alloc_mw(struct ib_mw *ibmw, struct ib_udata *udata)
{
struct rxe_mw *mw = to_rmw(ibmw);
struct rxe_pd *pd = to_rpd(ibmw->pd);
struct rxe_dev *rxe = to_rdev(ibmw->device);
int ret;
rxe_add_ref(pd);
ret = rxe_add_to_pool(&rxe->mw_pool, mw);
if (ret) {
rxe_drop_ref(pd);
return ret;
}
rxe_add_index(mw);
ibmw->rkey = (mw->pelem.index << 8) | rxe_get_next_key(-1);
mw->state = (mw->ibmw.type == IB_MW_TYPE_2) ?
RXE_MW_STATE_FREE : RXE_MW_STATE_VALID;
spin_lock_init(&mw->lock);
return 0;
}
static void rxe_do_dealloc_mw(struct rxe_mw *mw)
{
if (mw->mr) {
struct rxe_mr *mr = mw->mr;
mw->mr = NULL;
atomic_dec(&mr->num_mw);
rxe_drop_ref(mr);
}
if (mw->qp) {
struct rxe_qp *qp = mw->qp;
mw->qp = NULL;
rxe_drop_ref(qp);
}
mw->access = 0;
mw->addr = 0;
mw->length = 0;
mw->state = RXE_MW_STATE_INVALID;
}
int rxe_dealloc_mw(struct ib_mw *ibmw)
{
struct rxe_mw *mw = to_rmw(ibmw);
struct rxe_pd *pd = to_rpd(ibmw->pd);
unsigned long flags;
spin_lock_irqsave(&mw->lock, flags);
rxe_do_dealloc_mw(mw);
spin_unlock_irqrestore(&mw->lock, flags);
rxe_drop_ref(mw);
rxe_drop_ref(pd);
return 0;
}
static int rxe_check_bind_mw(struct rxe_qp *qp, struct rxe_send_wqe *wqe,
struct rxe_mw *mw, struct rxe_mr *mr)
{
if (mw->ibmw.type == IB_MW_TYPE_1) {
if (unlikely(mw->state != RXE_MW_STATE_VALID)) {
pr_err_once(
"attempt to bind a type 1 MW not in the valid state\n");
return -EINVAL;
}
/* o10-36.2.2 */
if (unlikely((mw->access & IB_ZERO_BASED))) {
pr_err_once("attempt to bind a zero based type 1 MW\n");
return -EINVAL;
}
}
if (mw->ibmw.type == IB_MW_TYPE_2) {
/* o10-37.2.30 */
if (unlikely(mw->state != RXE_MW_STATE_FREE)) {
pr_err_once(
"attempt to bind a type 2 MW not in the free state\n");
return -EINVAL;
}
/* C10-72 */
if (unlikely(qp->pd != to_rpd(mw->ibmw.pd))) {
pr_err_once(
"attempt to bind type 2 MW with qp with different PD\n");
return -EINVAL;
}
/* o10-37.2.40 */
if (unlikely(!mr || wqe->wr.wr.mw.length == 0)) {
pr_err_once(
"attempt to invalidate type 2 MW by binding with NULL or zero length MR\n");
return -EINVAL;
}
}
if (unlikely((wqe->wr.wr.mw.rkey & 0xff) == (mw->ibmw.rkey & 0xff))) {
pr_err_once("attempt to bind MW with same key\n");
return -EINVAL;
}
/* remaining checks only apply to a nonzero MR */
if (!mr)
return 0;
if (unlikely(mr->access & IB_ZERO_BASED)) {
pr_err_once("attempt to bind MW to zero based MR\n");
return -EINVAL;
}
/* C10-73 */
if (unlikely(!(mr->access & IB_ACCESS_MW_BIND))) {
pr_err_once(
"attempt to bind an MW to an MR without bind access\n");
return -EINVAL;
}
/* C10-74 */
if (unlikely((mw->access &
(IB_ACCESS_REMOTE_WRITE | IB_ACCESS_REMOTE_ATOMIC)) &&
!(mr->access & IB_ACCESS_LOCAL_WRITE))) {
pr_err_once(
"attempt to bind an writeable MW to an MR without local write access\n");
return -EINVAL;
}
/* C10-75 */
if (mw->access & IB_ZERO_BASED) {
if (unlikely(wqe->wr.wr.mw.length > mr->length)) {
pr_err_once(
"attempt to bind a ZB MW outside of the MR\n");
return -EINVAL;
}
} else {
if (unlikely((wqe->wr.wr.mw.addr < mr->iova) ||
((wqe->wr.wr.mw.addr + wqe->wr.wr.mw.length) >
(mr->iova + mr->length)))) {
pr_err_once(
"attempt to bind a VA MW outside of the MR\n");
return -EINVAL;
}
}
return 0;
}
static void rxe_do_bind_mw(struct rxe_qp *qp, struct rxe_send_wqe *wqe,
struct rxe_mw *mw, struct rxe_mr *mr)
{
u32 rkey;
u32 new_rkey;
rkey = mw->ibmw.rkey;
new_rkey = (rkey & 0xffffff00) | (wqe->wr.wr.mw.rkey & 0x000000ff);
mw->ibmw.rkey = new_rkey;
mw->access = wqe->wr.wr.mw.access;
mw->state = RXE_MW_STATE_VALID;
mw->addr = wqe->wr.wr.mw.addr;
mw->length = wqe->wr.wr.mw.length;
if (mw->mr) {
rxe_drop_ref(mw->mr);
atomic_dec(&mw->mr->num_mw);
mw->mr = NULL;
}
if (mw->length) {
mw->mr = mr;
atomic_inc(&mr->num_mw);
rxe_add_ref(mr);
}
if (mw->ibmw.type == IB_MW_TYPE_2) {
rxe_add_ref(qp);
mw->qp = qp;
}
}
int rxe_bind_mw(struct rxe_qp *qp, struct rxe_send_wqe *wqe)
{
int ret;
struct rxe_mw *mw;
struct rxe_mr *mr;
struct rxe_dev *rxe = to_rdev(qp->ibqp.device);
unsigned long flags;
mw = rxe_pool_get_index(&rxe->mw_pool,
wqe->wr.wr.mw.mw_rkey >> 8);
if (unlikely(!mw)) {
ret = -EINVAL;
goto err;
}
if (unlikely(mw->ibmw.rkey != wqe->wr.wr.mw.mw_rkey)) {
ret = -EINVAL;
goto err_drop_mw;
}
if (likely(wqe->wr.wr.mw.length)) {
mr = rxe_pool_get_index(&rxe->mr_pool,
wqe->wr.wr.mw.mr_lkey >> 8);
if (unlikely(!mr)) {
ret = -EINVAL;
goto err_drop_mw;
}
if (unlikely(mr->ibmr.lkey != wqe->wr.wr.mw.mr_lkey)) {
ret = -EINVAL;
goto err_drop_mr;
}
} else {
mr = NULL;
}
spin_lock_irqsave(&mw->lock, flags);
ret = rxe_check_bind_mw(qp, wqe, mw, mr);
if (ret)
goto err_unlock;
rxe_do_bind_mw(qp, wqe, mw, mr);
err_unlock:
spin_unlock_irqrestore(&mw->lock, flags);
err_drop_mr:
if (mr)
rxe_drop_ref(mr);
err_drop_mw:
rxe_drop_ref(mw);
err:
return ret;
}
void rxe_mw_cleanup(struct rxe_pool_entry *elem)
{
struct rxe_mw *mw = container_of(elem, typeof(*mw), pelem);
rxe_drop_index(mw);
}
|