myri10ge: update firmware headers to 1.4.41
[linux-2.6.git] / net / rds / ib.c
1 /*
2  * Copyright (c) 2006 Oracle.  All rights reserved.
3  *
4  * This software is available to you under a choice of one of two
5  * licenses.  You may choose to be licensed under the terms of the GNU
6  * General Public License (GPL) Version 2, available from the file
7  * COPYING in the main directory of this source tree, or the
8  * OpenIB.org BSD license below:
9  *
10  *     Redistribution and use in source and binary forms, with or
11  *     without modification, are permitted provided that the following
12  *     conditions are met:
13  *
14  *      - Redistributions of source code must retain the above
15  *        copyright notice, this list of conditions and the following
16  *        disclaimer.
17  *
18  *      - Redistributions in binary form must reproduce the above
19  *        copyright notice, this list of conditions and the following
20  *        disclaimer in the documentation and/or other materials
21  *        provided with the distribution.
22  *
23  * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
24  * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
25  * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
26  * NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS
27  * BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN
28  * ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
29  * CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
30  * SOFTWARE.
31  *
32  */
33 #include <linux/kernel.h>
34 #include <linux/in.h>
35 #include <linux/if.h>
36 #include <linux/netdevice.h>
37 #include <linux/inetdevice.h>
38 #include <linux/if_arp.h>
39 #include <linux/delay.h>
40
41 #include "rds.h"
42 #include "ib.h"
43
44 unsigned int fmr_pool_size = RDS_FMR_POOL_SIZE;
45 unsigned int fmr_message_size = RDS_FMR_SIZE + 1; /* +1 allows for unaligned MRs */
46
47 module_param(fmr_pool_size, int, 0444);
48 MODULE_PARM_DESC(fmr_pool_size, " Max number of fmr per HCA");
49 module_param(fmr_message_size, int, 0444);
50 MODULE_PARM_DESC(fmr_message_size, " Max size of a RDMA transfer");
51
52 struct list_head rds_ib_devices;
53
54 DEFINE_SPINLOCK(ib_nodev_conns_lock);
55 LIST_HEAD(ib_nodev_conns);
56
57 void rds_ib_add_one(struct ib_device *device)
58 {
59         struct rds_ib_device *rds_ibdev;
60         struct ib_device_attr *dev_attr;
61
62         /* Only handle IB (no iWARP) devices */
63         if (device->node_type != RDMA_NODE_IB_CA)
64                 return;
65
66         dev_attr = kmalloc(sizeof *dev_attr, GFP_KERNEL);
67         if (!dev_attr)
68                 return;
69
70         if (ib_query_device(device, dev_attr)) {
71                 rdsdebug("Query device failed for %s\n", device->name);
72                 goto free_attr;
73         }
74
75         rds_ibdev = kmalloc(sizeof *rds_ibdev, GFP_KERNEL);
76         if (!rds_ibdev)
77                 goto free_attr;
78
79         spin_lock_init(&rds_ibdev->spinlock);
80
81         rds_ibdev->max_wrs = dev_attr->max_qp_wr;
82         rds_ibdev->max_sge = min(dev_attr->max_sge, RDS_IB_MAX_SGE);
83
84         rds_ibdev->fmr_page_shift = max(9, ffs(dev_attr->page_size_cap) - 1);
85         rds_ibdev->fmr_page_size  = 1 << rds_ibdev->fmr_page_shift;
86         rds_ibdev->fmr_page_mask  = ~((u64) rds_ibdev->fmr_page_size - 1);
87         rds_ibdev->fmr_max_remaps = dev_attr->max_map_per_fmr?: 32;
88         rds_ibdev->max_fmrs = dev_attr->max_fmr ?
89                         min_t(unsigned int, dev_attr->max_fmr, fmr_pool_size) :
90                         fmr_pool_size;
91
92         rds_ibdev->dev = device;
93         rds_ibdev->pd = ib_alloc_pd(device);
94         if (IS_ERR(rds_ibdev->pd))
95                 goto free_dev;
96
97         rds_ibdev->mr = ib_get_dma_mr(rds_ibdev->pd,
98                                       IB_ACCESS_LOCAL_WRITE);
99         if (IS_ERR(rds_ibdev->mr))
100                 goto err_pd;
101
102         rds_ibdev->mr_pool = rds_ib_create_mr_pool(rds_ibdev);
103         if (IS_ERR(rds_ibdev->mr_pool)) {
104                 rds_ibdev->mr_pool = NULL;
105                 goto err_mr;
106         }
107
108         INIT_LIST_HEAD(&rds_ibdev->ipaddr_list);
109         INIT_LIST_HEAD(&rds_ibdev->conn_list);
110         list_add_tail(&rds_ibdev->list, &rds_ib_devices);
111
112         ib_set_client_data(device, &rds_ib_client, rds_ibdev);
113
114         goto free_attr;
115
116 err_mr:
117         ib_dereg_mr(rds_ibdev->mr);
118 err_pd:
119         ib_dealloc_pd(rds_ibdev->pd);
120 free_dev:
121         kfree(rds_ibdev);
122 free_attr:
123         kfree(dev_attr);
124 }
125
126 void rds_ib_remove_one(struct ib_device *device)
127 {
128         struct rds_ib_device *rds_ibdev;
129         struct rds_ib_ipaddr *i_ipaddr, *i_next;
130
131         rds_ibdev = ib_get_client_data(device, &rds_ib_client);
132         if (!rds_ibdev)
133                 return;
134
135         list_for_each_entry_safe(i_ipaddr, i_next, &rds_ibdev->ipaddr_list, list) {
136                 list_del(&i_ipaddr->list);
137                 kfree(i_ipaddr);
138         }
139
140         rds_ib_remove_conns(rds_ibdev);
141
142         if (rds_ibdev->mr_pool)
143                 rds_ib_destroy_mr_pool(rds_ibdev->mr_pool);
144
145         ib_dereg_mr(rds_ibdev->mr);
146
147         while (ib_dealloc_pd(rds_ibdev->pd)) {
148                 rdsdebug("Failed to dealloc pd %p\n", rds_ibdev->pd);
149                 msleep(1);
150         }
151
152         list_del(&rds_ibdev->list);
153         kfree(rds_ibdev);
154 }
155
156 struct ib_client rds_ib_client = {
157         .name   = "rds_ib",
158         .add    = rds_ib_add_one,
159         .remove = rds_ib_remove_one
160 };
161
162 static int rds_ib_conn_info_visitor(struct rds_connection *conn,
163                                     void *buffer)
164 {
165         struct rds_info_rdma_connection *iinfo = buffer;
166         struct rds_ib_connection *ic;
167
168         /* We will only ever look at IB transports */
169         if (conn->c_trans != &rds_ib_transport)
170                 return 0;
171
172         iinfo->src_addr = conn->c_laddr;
173         iinfo->dst_addr = conn->c_faddr;
174
175         memset(&iinfo->src_gid, 0, sizeof(iinfo->src_gid));
176         memset(&iinfo->dst_gid, 0, sizeof(iinfo->dst_gid));
177         if (rds_conn_state(conn) == RDS_CONN_UP) {
178                 struct rds_ib_device *rds_ibdev;
179                 struct rdma_dev_addr *dev_addr;
180
181                 ic = conn->c_transport_data;
182                 dev_addr = &ic->i_cm_id->route.addr.dev_addr;
183
184                 ib_addr_get_sgid(dev_addr, (union ib_gid *) &iinfo->src_gid);
185                 ib_addr_get_dgid(dev_addr, (union ib_gid *) &iinfo->dst_gid);
186
187                 rds_ibdev = ib_get_client_data(ic->i_cm_id->device, &rds_ib_client);
188                 iinfo->max_send_wr = ic->i_send_ring.w_nr;
189                 iinfo->max_recv_wr = ic->i_recv_ring.w_nr;
190                 iinfo->max_send_sge = rds_ibdev->max_sge;
191                 rds_ib_get_mr_info(rds_ibdev, iinfo);
192         }
193         return 1;
194 }
195
196 static void rds_ib_ic_info(struct socket *sock, unsigned int len,
197                            struct rds_info_iterator *iter,
198                            struct rds_info_lengths *lens)
199 {
200         rds_for_each_conn_info(sock, len, iter, lens,
201                                 rds_ib_conn_info_visitor,
202                                 sizeof(struct rds_info_rdma_connection));
203 }
204
205
206 /*
207  * Early RDS/IB was built to only bind to an address if there is an IPoIB
208  * device with that address set.
209  *
210  * If it were me, I'd advocate for something more flexible.  Sending and
211  * receiving should be device-agnostic.  Transports would try and maintain
212  * connections between peers who have messages queued.  Userspace would be
213  * allowed to influence which paths have priority.  We could call userspace
214  * asserting this policy "routing".
215  */
216 static int rds_ib_laddr_check(__be32 addr)
217 {
218         int ret;
219         struct rdma_cm_id *cm_id;
220         struct sockaddr_in sin;
221
222         /* Create a CMA ID and try to bind it. This catches both
223          * IB and iWARP capable NICs.
224          */
225         cm_id = rdma_create_id(NULL, NULL, RDMA_PS_TCP);
226         if (!cm_id)
227                 return -EADDRNOTAVAIL;
228
229         memset(&sin, 0, sizeof(sin));
230         sin.sin_family = AF_INET;
231         sin.sin_addr.s_addr = addr;
232
233         /* rdma_bind_addr will only succeed for IB & iWARP devices */
234         ret = rdma_bind_addr(cm_id, (struct sockaddr *)&sin);
235         /* due to this, we will claim to support iWARP devices unless we
236            check node_type. */
237         if (ret || cm_id->device->node_type != RDMA_NODE_IB_CA)
238                 ret = -EADDRNOTAVAIL;
239
240         rdsdebug("addr %pI4 ret %d node type %d\n",
241                 &addr, ret,
242                 cm_id->device ? cm_id->device->node_type : -1);
243
244         rdma_destroy_id(cm_id);
245
246         return ret;
247 }
248
249 void rds_ib_exit(void)
250 {
251         rds_info_deregister_func(RDS_INFO_IB_CONNECTIONS, rds_ib_ic_info);
252         rds_ib_remove_nodev_conns();
253         ib_unregister_client(&rds_ib_client);
254         rds_ib_sysctl_exit();
255         rds_ib_recv_exit();
256         rds_trans_unregister(&rds_ib_transport);
257 }
258
259 struct rds_transport rds_ib_transport = {
260         .laddr_check            = rds_ib_laddr_check,
261         .xmit_complete          = rds_ib_xmit_complete,
262         .xmit                   = rds_ib_xmit,
263         .xmit_cong_map          = NULL,
264         .xmit_rdma              = rds_ib_xmit_rdma,
265         .recv                   = rds_ib_recv,
266         .conn_alloc             = rds_ib_conn_alloc,
267         .conn_free              = rds_ib_conn_free,
268         .conn_connect           = rds_ib_conn_connect,
269         .conn_shutdown          = rds_ib_conn_shutdown,
270         .inc_copy_to_user       = rds_ib_inc_copy_to_user,
271         .inc_purge              = rds_ib_inc_purge,
272         .inc_free               = rds_ib_inc_free,
273         .cm_initiate_connect    = rds_ib_cm_initiate_connect,
274         .cm_handle_connect      = rds_ib_cm_handle_connect,
275         .cm_connect_complete    = rds_ib_cm_connect_complete,
276         .stats_info_copy        = rds_ib_stats_info_copy,
277         .exit                   = rds_ib_exit,
278         .get_mr                 = rds_ib_get_mr,
279         .sync_mr                = rds_ib_sync_mr,
280         .free_mr                = rds_ib_free_mr,
281         .flush_mrs              = rds_ib_flush_mrs,
282         .t_owner                = THIS_MODULE,
283         .t_name                 = "infiniband",
284 };
285
286 int __init rds_ib_init(void)
287 {
288         int ret;
289
290         INIT_LIST_HEAD(&rds_ib_devices);
291
292         ret = ib_register_client(&rds_ib_client);
293         if (ret)
294                 goto out;
295
296         ret = rds_ib_sysctl_init();
297         if (ret)
298                 goto out_ibreg;
299
300         ret = rds_ib_recv_init();
301         if (ret)
302                 goto out_sysctl;
303
304         ret = rds_trans_register(&rds_ib_transport);
305         if (ret)
306                 goto out_recv;
307
308         rds_info_register_func(RDS_INFO_IB_CONNECTIONS, rds_ib_ic_info);
309
310         goto out;
311
312 out_recv:
313         rds_ib_recv_exit();
314 out_sysctl:
315         rds_ib_sysctl_exit();
316 out_ibreg:
317         ib_unregister_client(&rds_ib_client);
318 out:
319         return ret;
320 }
321
322 MODULE_LICENSE("GPL");
323