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
|
/*
* Copyright (c) 2004 Topspin Communications. All rights reserved.
* Copyright (c) 2005 Sun Microsystems, Inc. All rights reserved.
*
* This software is available to you under a choice of one of two
* licenses. You may choose to be licensed under the terms of the GNU
* General Public License (GPL) Version 2, available from the file
* COPYING in the main directory of this source tree, or the
* OpenIB.org BSD license below:
*
* Redistribution and use in source and binary forms, with or
* without modification, are permitted provided that the following
* conditions are met:
*
* - Redistributions of source code must retain the above
* copyright notice, this list of conditions and the following
* disclaimer.
*
* - Redistributions in binary form must reproduce the above
* copyright notice, this list of conditions and the following
* disclaimer in the documentation and/or other materials
* provided with the distribution.
*
* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
* EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
* MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
* NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS
* BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN
* ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
* CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
* SOFTWARE.
*
* $Id: mthca_av.c 1349 2004-12-16 21:09:43Z roland $
*/
#include <linux/init.h>
#include <rdma/ib_verbs.h>
#include <rdma/ib_cache.h>
#include "mthca_dev.h"
struct mthca_av {
__be32 port_pd;
u8 reserved1;
u8 g_slid;
__be16 dlid;
u8 reserved2;
u8 gid_index;
u8 msg_sr;
u8 hop_limit;
__be32 sl_tclass_flowlabel;
__be32 dgid[4];
};
int mthca_create_ah(struct mthca_dev *dev,
struct mthca_pd *pd,
struct ib_ah_attr *ah_attr,
struct mthca_ah *ah)
{
u32 index = -1;
struct mthca_av *av = NULL;
ah->type = MTHCA_AH_PCI_POOL;
if (mthca_is_memfree(dev)) {
ah->av = kmalloc(sizeof *ah->av, GFP_ATOMIC);
if (!ah->av)
return -ENOMEM;
ah->type = MTHCA_AH_KMALLOC;
av = ah->av;
} else if (!atomic_read(&pd->sqp_count) &&
!(dev->mthca_flags & MTHCA_FLAG_DDR_HIDDEN)) {
index = mthca_alloc(&dev->av_table.alloc);
/* fall back to allocate in host memory */
if (index == -1)
goto on_hca_fail;
av = kmalloc(sizeof *av, GFP_ATOMIC);
if (!av)
goto on_hca_fail;
ah->type = MTHCA_AH_ON_HCA;
ah->avdma = dev->av_table.ddr_av_base +
index * MTHCA_AV_SIZE;
}
on_hca_fail:
if (ah->type == MTHCA_AH_PCI_POOL) {
ah->av = pci_pool_alloc(dev->av_table.pool,
SLAB_ATOMIC, &ah->avdma);
if (!ah->av)
return -ENOMEM;
av = ah->av;
}
ah->key = pd->ntmr.ibmr.lkey;
memset(av, 0, MTHCA_AV_SIZE);
av->port_pd = cpu_to_be32(pd->pd_num | (ah_attr->port_num << 24));
av->g_slid = ah_attr->src_path_bits;
av->dlid = cpu_to_be16(ah_attr->dlid);
av->msg_sr = (3 << 4) | /* 2K message */
ah_attr->static_rate;
av->sl_tclass_flowlabel = cpu_to_be32(ah_attr->sl << 28);
if (ah_attr->ah_flags & IB_AH_GRH) {
av->g_slid |= 0x80;
av->gid_index = (ah_attr->port_num - 1) * dev->limits.gid_table_len +
ah_attr->grh.sgid_index;
av->hop_limit = ah_attr->grh.hop_limit;
av->sl_tclass_flowlabel |=
cpu_to_be32((ah_attr->grh.traffic_class << 20) |
ah_attr->grh.flow_label);
memcpy(av->dgid, ah_attr->grh.dgid.raw, 16);
} else {
/* Arbel workaround -- low byte of GID must be 2 */
av->dgid[3] = cpu_to_be32(2);
}
if (0) {
int j;
mthca_dbg(dev, "Created UDAV at %p/%08lx:\n",
av, (unsigned long) ah->avdma);
for (j = 0; j < 8; ++j)
printk(KERN_DEBUG " [%2x] %08x\n",
j * 4, be32_to_cpu(((__be32 *) av)[j]));
}
if (ah->type == MTHCA_AH_ON_HCA) {
memcpy_toio(dev->av_table.av_map + index * MTHCA_AV_SIZE,
av, MTHCA_AV_SIZE);
kfree(av);
}
return 0;
}
int mthca_destroy_ah(struct mthca_dev *dev, struct mthca_ah *ah)
{
switch (ah->type) {
case MTHCA_AH_ON_HCA:
mthca_free(&dev->av_table.alloc,
(ah->avdma - dev->av_table.ddr_av_base) /
MTHCA_AV_SIZE);
break;
case MTHCA_AH_PCI_POOL:
pci_pool_free(dev->av_table.pool, ah->av, ah->avdma);
break;
case MTHCA_AH_KMALLOC:
kfree(ah->av);
break;
}
return 0;
}
int mthca_read_ah(struct mthca_dev *dev, struct mthca_ah *ah,
struct ib_ud_header *header)
{
if (ah->type == MTHCA_AH_ON_HCA)
return -EINVAL;
header->lrh.service_level = be32_to_cpu(ah->av->sl_tclass_flowlabel) >> 28;
header->lrh.destination_lid = ah->av->dlid;
header->lrh.source_lid = cpu_to_be16(ah->av->g_slid & 0x7f);
if (ah->av->g_slid & 0x80) {
header->grh_present = 1;
header->grh.traffic_class =
(be32_to_cpu(ah->av->sl_tclass_flowlabel) >> 20) & 0xff;
header->grh.flow_label =
ah->av->sl_tclass_flowlabel & cpu_to_be32(0xfffff);
ib_get_cached_gid(&dev->ib_dev,
be32_to_cpu(ah->av->port_pd) >> 24,
ah->av->gid_index,
&header->grh.source_gid);
memcpy(header->grh.destination_gid.raw,
ah->av->dgid, 16);
} else {
header->grh_present = 0;
}
return 0;
}
int __devinit mthca_init_av_table(struct mthca_dev *dev)
{
int err;
if (mthca_is_memfree(dev))
return 0;
err = mthca_alloc_init(&dev->av_table.alloc,
dev->av_table.num_ddr_avs,
dev->av_table.num_ddr_avs - 1,
0);
if (err)
return err;
dev->av_table.pool = pci_pool_create("mthca_av", dev->pdev,
MTHCA_AV_SIZE,
MTHCA_AV_SIZE, 0);
if (!dev->av_table.pool)
goto out_free_alloc;
if (!(dev->mthca_flags & MTHCA_FLAG_DDR_HIDDEN)) {
dev->av_table.av_map = ioremap(pci_resource_start(dev->pdev, 4) +
dev->av_table.ddr_av_base -
dev->ddr_start,
dev->av_table.num_ddr_avs *
MTHCA_AV_SIZE);
if (!dev->av_table.av_map)
goto out_free_pool;
} else
dev->av_table.av_map = NULL;
return 0;
out_free_pool:
pci_pool_destroy(dev->av_table.pool);
out_free_alloc:
mthca_alloc_cleanup(&dev->av_table.alloc);
return -ENOMEM;
}
void __devexit mthca_cleanup_av_table(struct mthca_dev *dev)
{
if (mthca_is_memfree(dev))
return;
if (dev->av_table.av_map)
iounmap(dev->av_table.av_map);
pci_pool_destroy(dev->av_table.pool);
mthca_alloc_cleanup(&dev->av_table.alloc);
}
|
