IB/mthca: check port validity in modify_qp
[linux-2.6] / drivers / infiniband / hw / mthca / mthca_av.c
1 /*
2  * Copyright (c) 2004 Topspin Communications.  All rights reserved.
3  * Copyright (c) 2005 Sun Microsystems, Inc. All rights reserved.
4  *
5  * This software is available to you under a choice of one of two
6  * licenses.  You may choose to be licensed under the terms of the GNU
7  * General Public License (GPL) Version 2, available from the file
8  * COPYING in the main directory of this source tree, or the
9  * OpenIB.org BSD license below:
10  *
11  *     Redistribution and use in source and binary forms, with or
12  *     without modification, are permitted provided that the following
13  *     conditions are met:
14  *
15  *      - Redistributions of source code must retain the above
16  *        copyright notice, this list of conditions and the following
17  *        disclaimer.
18  *
19  *      - Redistributions in binary form must reproduce the above
20  *        copyright notice, this list of conditions and the following
21  *        disclaimer in the documentation and/or other materials
22  *        provided with the distribution.
23  *
24  * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
25  * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
26  * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
27  * NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS
28  * BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN
29  * ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
30  * CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
31  * SOFTWARE.
32  *
33  * $Id: mthca_av.c 1349 2004-12-16 21:09:43Z roland $
34  */
35
36 #include <linux/init.h>
37 #include <linux/string.h>
38 #include <linux/slab.h>
39
40 #include <rdma/ib_verbs.h>
41 #include <rdma/ib_cache.h>
42
43 #include "mthca_dev.h"
44
45 struct mthca_av {
46         __be32 port_pd;
47         u8     reserved1;
48         u8     g_slid;
49         __be16 dlid;
50         u8     reserved2;
51         u8     gid_index;
52         u8     msg_sr;
53         u8     hop_limit;
54         __be32 sl_tclass_flowlabel;
55         __be32 dgid[4];
56 };
57
58 int mthca_create_ah(struct mthca_dev *dev,
59                     struct mthca_pd *pd,
60                     struct ib_ah_attr *ah_attr,
61                     struct mthca_ah *ah)
62 {
63         u32 index = -1;
64         struct mthca_av *av = NULL;
65
66         ah->type = MTHCA_AH_PCI_POOL;
67
68         if (mthca_is_memfree(dev)) {
69                 ah->av   = kmalloc(sizeof *ah->av, GFP_ATOMIC);
70                 if (!ah->av)
71                         return -ENOMEM;
72
73                 ah->type = MTHCA_AH_KMALLOC;
74                 av       = ah->av;
75         } else if (!atomic_read(&pd->sqp_count) &&
76                  !(dev->mthca_flags & MTHCA_FLAG_DDR_HIDDEN)) {
77                 index = mthca_alloc(&dev->av_table.alloc);
78
79                 /* fall back to allocate in host memory */
80                 if (index == -1)
81                         goto on_hca_fail;
82
83                 av = kmalloc(sizeof *av, GFP_ATOMIC);
84                 if (!av)
85                         goto on_hca_fail;
86
87                 ah->type = MTHCA_AH_ON_HCA;
88                 ah->avdma  = dev->av_table.ddr_av_base +
89                         index * MTHCA_AV_SIZE;
90         }
91
92 on_hca_fail:
93         if (ah->type == MTHCA_AH_PCI_POOL) {
94                 ah->av = pci_pool_alloc(dev->av_table.pool,
95                                         SLAB_ATOMIC, &ah->avdma);
96                 if (!ah->av)
97                         return -ENOMEM;
98
99                 av = ah->av;
100         }
101
102         ah->key = pd->ntmr.ibmr.lkey;
103
104         memset(av, 0, MTHCA_AV_SIZE);
105
106         av->port_pd = cpu_to_be32(pd->pd_num | (ah_attr->port_num << 24));
107         av->g_slid  = ah_attr->src_path_bits;
108         av->dlid    = cpu_to_be16(ah_attr->dlid);
109         av->msg_sr  = (3 << 4) | /* 2K message */
110                 ah_attr->static_rate;
111         av->sl_tclass_flowlabel = cpu_to_be32(ah_attr->sl << 28);
112         if (ah_attr->ah_flags & IB_AH_GRH) {
113                 av->g_slid |= 0x80;
114                 av->gid_index = (ah_attr->port_num - 1) * dev->limits.gid_table_len +
115                         ah_attr->grh.sgid_index;
116                 av->hop_limit = ah_attr->grh.hop_limit;
117                 av->sl_tclass_flowlabel |=
118                         cpu_to_be32((ah_attr->grh.traffic_class << 20) |
119                                     ah_attr->grh.flow_label);
120                 memcpy(av->dgid, ah_attr->grh.dgid.raw, 16);
121         } else {
122                 /* Arbel workaround -- low byte of GID must be 2 */
123                 av->dgid[3] = cpu_to_be32(2);
124         }
125
126         if (0) {
127                 int j;
128
129                 mthca_dbg(dev, "Created UDAV at %p/%08lx:\n",
130                           av, (unsigned long) ah->avdma);
131                 for (j = 0; j < 8; ++j)
132                         printk(KERN_DEBUG "  [%2x] %08x\n",
133                                j * 4, be32_to_cpu(((__be32 *) av)[j]));
134         }
135
136         if (ah->type == MTHCA_AH_ON_HCA) {
137                 memcpy_toio(dev->av_table.av_map + index * MTHCA_AV_SIZE,
138                             av, MTHCA_AV_SIZE);
139                 kfree(av);
140         }
141
142         return 0;
143 }
144
145 int mthca_destroy_ah(struct mthca_dev *dev, struct mthca_ah *ah)
146 {
147         switch (ah->type) {
148         case MTHCA_AH_ON_HCA:
149                 mthca_free(&dev->av_table.alloc,
150                            (ah->avdma - dev->av_table.ddr_av_base) /
151                            MTHCA_AV_SIZE);
152                 break;
153
154         case MTHCA_AH_PCI_POOL:
155                 pci_pool_free(dev->av_table.pool, ah->av, ah->avdma);
156                 break;
157
158         case MTHCA_AH_KMALLOC:
159                 kfree(ah->av);
160                 break;
161         }
162
163         return 0;
164 }
165
166 int mthca_read_ah(struct mthca_dev *dev, struct mthca_ah *ah,
167                   struct ib_ud_header *header)
168 {
169         if (ah->type == MTHCA_AH_ON_HCA)
170                 return -EINVAL;
171
172         header->lrh.service_level   = be32_to_cpu(ah->av->sl_tclass_flowlabel) >> 28;
173         header->lrh.destination_lid = ah->av->dlid;
174         header->lrh.source_lid      = cpu_to_be16(ah->av->g_slid & 0x7f);
175         if (ah->av->g_slid & 0x80) {
176                 header->grh_present = 1;
177                 header->grh.traffic_class =
178                         (be32_to_cpu(ah->av->sl_tclass_flowlabel) >> 20) & 0xff;
179                 header->grh.flow_label    =
180                         ah->av->sl_tclass_flowlabel & cpu_to_be32(0xfffff);
181                 ib_get_cached_gid(&dev->ib_dev,
182                                   be32_to_cpu(ah->av->port_pd) >> 24,
183                                   ah->av->gid_index,
184                                   &header->grh.source_gid);
185                 memcpy(header->grh.destination_gid.raw,
186                        ah->av->dgid, 16);
187         } else {
188                 header->grh_present = 0;
189         }
190
191         return 0;
192 }
193
194 int __devinit mthca_init_av_table(struct mthca_dev *dev)
195 {
196         int err;
197
198         if (mthca_is_memfree(dev))
199                 return 0;
200
201         err = mthca_alloc_init(&dev->av_table.alloc,
202                                dev->av_table.num_ddr_avs,
203                                dev->av_table.num_ddr_avs - 1,
204                                0);
205         if (err)
206                 return err;
207
208         dev->av_table.pool = pci_pool_create("mthca_av", dev->pdev,
209                                              MTHCA_AV_SIZE,
210                                              MTHCA_AV_SIZE, 0);
211         if (!dev->av_table.pool)
212                 goto out_free_alloc;
213
214         if (!(dev->mthca_flags & MTHCA_FLAG_DDR_HIDDEN)) {
215                 dev->av_table.av_map = ioremap(pci_resource_start(dev->pdev, 4) +
216                                                dev->av_table.ddr_av_base -
217                                                dev->ddr_start,
218                                                dev->av_table.num_ddr_avs *
219                                                MTHCA_AV_SIZE);
220                 if (!dev->av_table.av_map)
221                         goto out_free_pool;
222         } else
223                 dev->av_table.av_map = NULL;
224
225         return 0;
226
227  out_free_pool:
228         pci_pool_destroy(dev->av_table.pool);
229
230  out_free_alloc:
231         mthca_alloc_cleanup(&dev->av_table.alloc);
232         return -ENOMEM;
233 }
234
235 void __devexit mthca_cleanup_av_table(struct mthca_dev *dev)
236 {
237         if (mthca_is_memfree(dev))
238                 return;
239
240         if (dev->av_table.av_map)
241                 iounmap(dev->av_table.av_map);
242         pci_pool_destroy(dev->av_table.pool);
243         mthca_alloc_cleanup(&dev->av_table.alloc);
244 }