Merge branch 'master' of master.kernel.org:/pub/scm/linux/kernel/git/davem/net-2.6
[linux-2.6] / drivers / infiniband / hw / amso1100 / c2_ae.c
1 /*
2  * Copyright (c) 2005 Ammasso, Inc. All rights reserved.
3  * Copyright (c) 2005 Open Grid Computing, 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 #include "c2.h"
34 #include <rdma/iw_cm.h>
35 #include "c2_status.h"
36 #include "c2_ae.h"
37
38 static int c2_convert_cm_status(u32 c2_status)
39 {
40         switch (c2_status) {
41         case C2_CONN_STATUS_SUCCESS:
42                 return 0;
43         case C2_CONN_STATUS_REJECTED:
44                 return -ENETRESET;
45         case C2_CONN_STATUS_REFUSED:
46                 return -ECONNREFUSED;
47         case C2_CONN_STATUS_TIMEDOUT:
48                 return -ETIMEDOUT;
49         case C2_CONN_STATUS_NETUNREACH:
50                 return -ENETUNREACH;
51         case C2_CONN_STATUS_HOSTUNREACH:
52                 return -EHOSTUNREACH;
53         case C2_CONN_STATUS_INVALID_RNIC:
54                 return -EINVAL;
55         case C2_CONN_STATUS_INVALID_QP:
56                 return -EINVAL;
57         case C2_CONN_STATUS_INVALID_QP_STATE:
58                 return -EINVAL;
59         case C2_CONN_STATUS_ADDR_NOT_AVAIL:
60                 return -EADDRNOTAVAIL;
61         default:
62                 printk(KERN_ERR PFX
63                        "%s - Unable to convert CM status: %d\n",
64                        __func__, c2_status);
65                 return -EIO;
66         }
67 }
68
69 static const char* to_event_str(int event)
70 {
71         static const char* event_str[] = {
72                 "CCAE_REMOTE_SHUTDOWN",
73                 "CCAE_ACTIVE_CONNECT_RESULTS",
74                 "CCAE_CONNECTION_REQUEST",
75                 "CCAE_LLP_CLOSE_COMPLETE",
76                 "CCAE_TERMINATE_MESSAGE_RECEIVED",
77                 "CCAE_LLP_CONNECTION_RESET",
78                 "CCAE_LLP_CONNECTION_LOST",
79                 "CCAE_LLP_SEGMENT_SIZE_INVALID",
80                 "CCAE_LLP_INVALID_CRC",
81                 "CCAE_LLP_BAD_FPDU",
82                 "CCAE_INVALID_DDP_VERSION",
83                 "CCAE_INVALID_RDMA_VERSION",
84                 "CCAE_UNEXPECTED_OPCODE",
85                 "CCAE_INVALID_DDP_QUEUE_NUMBER",
86                 "CCAE_RDMA_READ_NOT_ENABLED",
87                 "CCAE_RDMA_WRITE_NOT_ENABLED",
88                 "CCAE_RDMA_READ_TOO_SMALL",
89                 "CCAE_NO_L_BIT",
90                 "CCAE_TAGGED_INVALID_STAG",
91                 "CCAE_TAGGED_BASE_BOUNDS_VIOLATION",
92                 "CCAE_TAGGED_ACCESS_RIGHTS_VIOLATION",
93                 "CCAE_TAGGED_INVALID_PD",
94                 "CCAE_WRAP_ERROR",
95                 "CCAE_BAD_CLOSE",
96                 "CCAE_BAD_LLP_CLOSE",
97                 "CCAE_INVALID_MSN_RANGE",
98                 "CCAE_INVALID_MSN_GAP",
99                 "CCAE_IRRQ_OVERFLOW",
100                 "CCAE_IRRQ_MSN_GAP",
101                 "CCAE_IRRQ_MSN_RANGE",
102                 "CCAE_IRRQ_INVALID_STAG",
103                 "CCAE_IRRQ_BASE_BOUNDS_VIOLATION",
104                 "CCAE_IRRQ_ACCESS_RIGHTS_VIOLATION",
105                 "CCAE_IRRQ_INVALID_PD",
106                 "CCAE_IRRQ_WRAP_ERROR",
107                 "CCAE_CQ_SQ_COMPLETION_OVERFLOW",
108                 "CCAE_CQ_RQ_COMPLETION_ERROR",
109                 "CCAE_QP_SRQ_WQE_ERROR",
110                 "CCAE_QP_LOCAL_CATASTROPHIC_ERROR",
111                 "CCAE_CQ_OVERFLOW",
112                 "CCAE_CQ_OPERATION_ERROR",
113                 "CCAE_SRQ_LIMIT_REACHED",
114                 "CCAE_QP_RQ_LIMIT_REACHED",
115                 "CCAE_SRQ_CATASTROPHIC_ERROR",
116                 "CCAE_RNIC_CATASTROPHIC_ERROR"
117         };
118
119         if (event < CCAE_REMOTE_SHUTDOWN ||
120             event > CCAE_RNIC_CATASTROPHIC_ERROR)
121                 return "<invalid event>";
122
123         event -= CCAE_REMOTE_SHUTDOWN;
124         return event_str[event];
125 }
126
127 static const char *to_qp_state_str(int state)
128 {
129         switch (state) {
130         case C2_QP_STATE_IDLE:
131                 return "C2_QP_STATE_IDLE";
132         case C2_QP_STATE_CONNECTING:
133                 return "C2_QP_STATE_CONNECTING";
134         case C2_QP_STATE_RTS:
135                 return "C2_QP_STATE_RTS";
136         case C2_QP_STATE_CLOSING:
137                 return "C2_QP_STATE_CLOSING";
138         case C2_QP_STATE_TERMINATE:
139                 return "C2_QP_STATE_TERMINATE";
140         case C2_QP_STATE_ERROR:
141                 return "C2_QP_STATE_ERROR";
142         default:
143                 return "<invalid QP state>";
144         };
145 }
146
147 void c2_ae_event(struct c2_dev *c2dev, u32 mq_index)
148 {
149         struct c2_mq *mq = c2dev->qptr_array[mq_index];
150         union c2wr *wr;
151         void *resource_user_context;
152         struct iw_cm_event cm_event;
153         struct ib_event ib_event;
154         enum c2_resource_indicator resource_indicator;
155         enum c2_event_id event_id;
156         unsigned long flags;
157         int status;
158
159         /*
160          * retreive the message
161          */
162         wr = c2_mq_consume(mq);
163         if (!wr)
164                 return;
165
166         memset(&ib_event, 0, sizeof(ib_event));
167         memset(&cm_event, 0, sizeof(cm_event));
168
169         event_id = c2_wr_get_id(wr);
170         resource_indicator = be32_to_cpu(wr->ae.ae_generic.resource_type);
171         resource_user_context =
172             (void *) (unsigned long) wr->ae.ae_generic.user_context;
173
174         status = cm_event.status = c2_convert_cm_status(c2_wr_get_result(wr));
175
176         pr_debug("event received c2_dev=%p, event_id=%d, "
177                 "resource_indicator=%d, user_context=%p, status = %d\n",
178                 c2dev, event_id, resource_indicator, resource_user_context,
179                 status);
180
181         switch (resource_indicator) {
182         case C2_RES_IND_QP:{
183
184                 struct c2_qp *qp = (struct c2_qp *)resource_user_context;
185                 struct iw_cm_id *cm_id = qp->cm_id;
186                 struct c2wr_ae_active_connect_results *res;
187
188                 if (!cm_id) {
189                         pr_debug("event received, but cm_id is <nul>, qp=%p!\n",
190                                 qp);
191                         goto ignore_it;
192                 }
193                 pr_debug("%s: event = %s, user_context=%llx, "
194                         "resource_type=%x, "
195                         "resource=%x, qp_state=%s\n",
196                         __func__,
197                         to_event_str(event_id),
198                         (unsigned long long) wr->ae.ae_generic.user_context,
199                         be32_to_cpu(wr->ae.ae_generic.resource_type),
200                         be32_to_cpu(wr->ae.ae_generic.resource),
201                         to_qp_state_str(be32_to_cpu(wr->ae.ae_generic.qp_state)));
202
203                 c2_set_qp_state(qp, be32_to_cpu(wr->ae.ae_generic.qp_state));
204
205                 switch (event_id) {
206                 case CCAE_ACTIVE_CONNECT_RESULTS:
207                         res = &wr->ae.ae_active_connect_results;
208                         cm_event.event = IW_CM_EVENT_CONNECT_REPLY;
209                         cm_event.local_addr.sin_addr.s_addr = res->laddr;
210                         cm_event.remote_addr.sin_addr.s_addr = res->raddr;
211                         cm_event.local_addr.sin_port = res->lport;
212                         cm_event.remote_addr.sin_port = res->rport;
213                         if (status == 0) {
214                                 cm_event.private_data_len =
215                                         be32_to_cpu(res->private_data_length);
216                                 cm_event.private_data = res->private_data;
217                         } else {
218                                 spin_lock_irqsave(&qp->lock, flags);
219                                 if (qp->cm_id) {
220                                         qp->cm_id->rem_ref(qp->cm_id);
221                                         qp->cm_id = NULL;
222                                 }
223                                 spin_unlock_irqrestore(&qp->lock, flags);
224                                 cm_event.private_data_len = 0;
225                                 cm_event.private_data = NULL;
226                         }
227                         if (cm_id->event_handler)
228                                 cm_id->event_handler(cm_id, &cm_event);
229                         break;
230                 case CCAE_TERMINATE_MESSAGE_RECEIVED:
231                 case CCAE_CQ_SQ_COMPLETION_OVERFLOW:
232                         ib_event.device = &c2dev->ibdev;
233                         ib_event.element.qp = &qp->ibqp;
234                         ib_event.event = IB_EVENT_QP_REQ_ERR;
235
236                         if (qp->ibqp.event_handler)
237                                 qp->ibqp.event_handler(&ib_event,
238                                                        qp->ibqp.
239                                                        qp_context);
240                         break;
241                 case CCAE_BAD_CLOSE:
242                 case CCAE_LLP_CLOSE_COMPLETE:
243                 case CCAE_LLP_CONNECTION_RESET:
244                 case CCAE_LLP_CONNECTION_LOST:
245                         BUG_ON(cm_id->event_handler==(void*)0x6b6b6b6b);
246
247                         spin_lock_irqsave(&qp->lock, flags);
248                         if (qp->cm_id) {
249                                 qp->cm_id->rem_ref(qp->cm_id);
250                                 qp->cm_id = NULL;
251                         }
252                         spin_unlock_irqrestore(&qp->lock, flags);
253                         cm_event.event = IW_CM_EVENT_CLOSE;
254                         cm_event.status = 0;
255                         if (cm_id->event_handler)
256                                 cm_id->event_handler(cm_id, &cm_event);
257                         break;
258                 default:
259                         BUG_ON(1);
260                         pr_debug("%s:%d Unexpected event_id=%d on QP=%p, "
261                                 "CM_ID=%p\n",
262                                 __func__, __LINE__,
263                                 event_id, qp, cm_id);
264                         break;
265                 }
266                 break;
267         }
268
269         case C2_RES_IND_EP:{
270
271                 struct c2wr_ae_connection_request *req =
272                         &wr->ae.ae_connection_request;
273                 struct iw_cm_id *cm_id =
274                         (struct iw_cm_id *)resource_user_context;
275
276                 pr_debug("C2_RES_IND_EP event_id=%d\n", event_id);
277                 if (event_id != CCAE_CONNECTION_REQUEST) {
278                         pr_debug("%s: Invalid event_id: %d\n",
279                                 __func__, event_id);
280                         break;
281                 }
282                 cm_event.event = IW_CM_EVENT_CONNECT_REQUEST;
283                 cm_event.provider_data = (void*)(unsigned long)req->cr_handle;
284                 cm_event.local_addr.sin_addr.s_addr = req->laddr;
285                 cm_event.remote_addr.sin_addr.s_addr = req->raddr;
286                 cm_event.local_addr.sin_port = req->lport;
287                 cm_event.remote_addr.sin_port = req->rport;
288                 cm_event.private_data_len =
289                         be32_to_cpu(req->private_data_length);
290                 cm_event.private_data = req->private_data;
291
292                 if (cm_id->event_handler)
293                         cm_id->event_handler(cm_id, &cm_event);
294                 break;
295         }
296
297         case C2_RES_IND_CQ:{
298                 struct c2_cq *cq =
299                     (struct c2_cq *) resource_user_context;
300
301                 pr_debug("IB_EVENT_CQ_ERR\n");
302                 ib_event.device = &c2dev->ibdev;
303                 ib_event.element.cq = &cq->ibcq;
304                 ib_event.event = IB_EVENT_CQ_ERR;
305
306                 if (cq->ibcq.event_handler)
307                         cq->ibcq.event_handler(&ib_event,
308                                                cq->ibcq.cq_context);
309         }
310
311         default:
312                 printk("Bad resource indicator = %d\n",
313                        resource_indicator);
314                 break;
315         }
316
317  ignore_it:
318         c2_mq_free(mq);
319 }