Add the rt linux 4.1.3-rt3 as base
[kvmfornfv.git] / kernel / drivers / infiniband / hw / cxgb3 / iwch_ev.c
1 /*
2  * Copyright (c) 2006 Chelsio, Inc. 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 #include <linux/gfp.h>
33 #include <linux/mman.h>
34 #include <net/sock.h>
35 #include "iwch_provider.h"
36 #include "iwch.h"
37 #include "iwch_cm.h"
38 #include "cxio_hal.h"
39 #include "cxio_wr.h"
40
41 static void post_qp_event(struct iwch_dev *rnicp, struct iwch_cq *chp,
42                           struct respQ_msg_t *rsp_msg,
43                           enum ib_event_type ib_event,
44                           int send_term)
45 {
46         struct ib_event event;
47         struct iwch_qp_attributes attrs;
48         struct iwch_qp *qhp;
49         unsigned long flag;
50
51         spin_lock(&rnicp->lock);
52         qhp = get_qhp(rnicp, CQE_QPID(rsp_msg->cqe));
53
54         if (!qhp) {
55                 printk(KERN_ERR "%s unaffiliated error 0x%x qpid 0x%x\n",
56                        __func__, CQE_STATUS(rsp_msg->cqe),
57                        CQE_QPID(rsp_msg->cqe));
58                 spin_unlock(&rnicp->lock);
59                 return;
60         }
61
62         if ((qhp->attr.state == IWCH_QP_STATE_ERROR) ||
63             (qhp->attr.state == IWCH_QP_STATE_TERMINATE)) {
64                 PDBG("%s AE received after RTS - "
65                      "qp state %d qpid 0x%x status 0x%x\n", __func__,
66                      qhp->attr.state, qhp->wq.qpid, CQE_STATUS(rsp_msg->cqe));
67                 spin_unlock(&rnicp->lock);
68                 return;
69         }
70
71         printk(KERN_ERR "%s - AE qpid 0x%x opcode %d status 0x%x "
72                "type %d wrid.hi 0x%x wrid.lo 0x%x \n", __func__,
73                CQE_QPID(rsp_msg->cqe), CQE_OPCODE(rsp_msg->cqe),
74                CQE_STATUS(rsp_msg->cqe), CQE_TYPE(rsp_msg->cqe),
75                CQE_WRID_HI(rsp_msg->cqe), CQE_WRID_LOW(rsp_msg->cqe));
76
77         atomic_inc(&qhp->refcnt);
78         spin_unlock(&rnicp->lock);
79
80         if (qhp->attr.state == IWCH_QP_STATE_RTS) {
81                 attrs.next_state = IWCH_QP_STATE_TERMINATE;
82                 iwch_modify_qp(qhp->rhp, qhp, IWCH_QP_ATTR_NEXT_STATE,
83                                &attrs, 1);
84                 if (send_term)
85                         iwch_post_terminate(qhp, rsp_msg);
86         }
87
88         event.event = ib_event;
89         event.device = chp->ibcq.device;
90         if (ib_event == IB_EVENT_CQ_ERR)
91                 event.element.cq = &chp->ibcq;
92         else
93                 event.element.qp = &qhp->ibqp;
94
95         if (qhp->ibqp.event_handler)
96                 (*qhp->ibqp.event_handler)(&event, qhp->ibqp.qp_context);
97
98         spin_lock_irqsave(&chp->comp_handler_lock, flag);
99         (*chp->ibcq.comp_handler)(&chp->ibcq, chp->ibcq.cq_context);
100         spin_unlock_irqrestore(&chp->comp_handler_lock, flag);
101
102         if (atomic_dec_and_test(&qhp->refcnt))
103                 wake_up(&qhp->wait);
104 }
105
106 void iwch_ev_dispatch(struct cxio_rdev *rdev_p, struct sk_buff *skb)
107 {
108         struct iwch_dev *rnicp;
109         struct respQ_msg_t *rsp_msg = (struct respQ_msg_t *) skb->data;
110         struct iwch_cq *chp;
111         struct iwch_qp *qhp;
112         u32 cqid = RSPQ_CQID(rsp_msg);
113         unsigned long flag;
114
115         rnicp = (struct iwch_dev *) rdev_p->ulp;
116         spin_lock(&rnicp->lock);
117         chp = get_chp(rnicp, cqid);
118         qhp = get_qhp(rnicp, CQE_QPID(rsp_msg->cqe));
119         if (!chp || !qhp) {
120                 printk(KERN_ERR MOD "BAD AE cqid 0x%x qpid 0x%x opcode %d "
121                        "status 0x%x type %d wrid.hi 0x%x wrid.lo 0x%x \n",
122                        cqid, CQE_QPID(rsp_msg->cqe),
123                        CQE_OPCODE(rsp_msg->cqe), CQE_STATUS(rsp_msg->cqe),
124                        CQE_TYPE(rsp_msg->cqe), CQE_WRID_HI(rsp_msg->cqe),
125                        CQE_WRID_LOW(rsp_msg->cqe));
126                 spin_unlock(&rnicp->lock);
127                 goto out;
128         }
129         iwch_qp_add_ref(&qhp->ibqp);
130         atomic_inc(&chp->refcnt);
131         spin_unlock(&rnicp->lock);
132
133         /*
134          * 1) completion of our sending a TERMINATE.
135          * 2) incoming TERMINATE message.
136          */
137         if ((CQE_OPCODE(rsp_msg->cqe) == T3_TERMINATE) &&
138             (CQE_STATUS(rsp_msg->cqe) == 0)) {
139                 if (SQ_TYPE(rsp_msg->cqe)) {
140                         PDBG("%s QPID 0x%x ep %p disconnecting\n",
141                              __func__, qhp->wq.qpid, qhp->ep);
142                         iwch_ep_disconnect(qhp->ep, 0, GFP_ATOMIC);
143                 } else {
144                         PDBG("%s post REQ_ERR AE QPID 0x%x\n", __func__,
145                              qhp->wq.qpid);
146                         post_qp_event(rnicp, chp, rsp_msg,
147                                       IB_EVENT_QP_REQ_ERR, 0);
148                         iwch_ep_disconnect(qhp->ep, 0, GFP_ATOMIC);
149                 }
150                 goto done;
151         }
152
153         /* Bad incoming Read request */
154         if (SQ_TYPE(rsp_msg->cqe) &&
155             (CQE_OPCODE(rsp_msg->cqe) == T3_READ_RESP)) {
156                 post_qp_event(rnicp, chp, rsp_msg, IB_EVENT_QP_REQ_ERR, 1);
157                 goto done;
158         }
159
160         /* Bad incoming write */
161         if (RQ_TYPE(rsp_msg->cqe) &&
162             (CQE_OPCODE(rsp_msg->cqe) == T3_RDMA_WRITE)) {
163                 post_qp_event(rnicp, chp, rsp_msg, IB_EVENT_QP_REQ_ERR, 1);
164                 goto done;
165         }
166
167         switch (CQE_STATUS(rsp_msg->cqe)) {
168
169         /* Completion Events */
170         case TPT_ERR_SUCCESS:
171
172                 /*
173                  * Confirm the destination entry if this is a RECV completion.
174                  */
175                 if (qhp->ep && SQ_TYPE(rsp_msg->cqe))
176                         dst_confirm(qhp->ep->dst);
177                 spin_lock_irqsave(&chp->comp_handler_lock, flag);
178                 (*chp->ibcq.comp_handler)(&chp->ibcq, chp->ibcq.cq_context);
179                 spin_unlock_irqrestore(&chp->comp_handler_lock, flag);
180                 break;
181
182         case TPT_ERR_STAG:
183         case TPT_ERR_PDID:
184         case TPT_ERR_QPID:
185         case TPT_ERR_ACCESS:
186         case TPT_ERR_WRAP:
187         case TPT_ERR_BOUND:
188         case TPT_ERR_INVALIDATE_SHARED_MR:
189         case TPT_ERR_INVALIDATE_MR_WITH_MW_BOUND:
190                 post_qp_event(rnicp, chp, rsp_msg, IB_EVENT_QP_ACCESS_ERR, 1);
191                 break;
192
193         /* Device Fatal Errors */
194         case TPT_ERR_ECC:
195         case TPT_ERR_ECC_PSTAG:
196         case TPT_ERR_INTERNAL_ERR:
197                 post_qp_event(rnicp, chp, rsp_msg, IB_EVENT_DEVICE_FATAL, 1);
198                 break;
199
200         /* QP Fatal Errors */
201         case TPT_ERR_OUT_OF_RQE:
202         case TPT_ERR_PBL_ADDR_BOUND:
203         case TPT_ERR_CRC:
204         case TPT_ERR_MARKER:
205         case TPT_ERR_PDU_LEN_ERR:
206         case TPT_ERR_DDP_VERSION:
207         case TPT_ERR_RDMA_VERSION:
208         case TPT_ERR_OPCODE:
209         case TPT_ERR_DDP_QUEUE_NUM:
210         case TPT_ERR_MSN:
211         case TPT_ERR_TBIT:
212         case TPT_ERR_MO:
213         case TPT_ERR_MSN_GAP:
214         case TPT_ERR_MSN_RANGE:
215         case TPT_ERR_RQE_ADDR_BOUND:
216         case TPT_ERR_IRD_OVERFLOW:
217                 post_qp_event(rnicp, chp, rsp_msg, IB_EVENT_QP_FATAL, 1);
218                 break;
219
220         default:
221                 printk(KERN_ERR MOD "Unknown T3 status 0x%x QPID 0x%x\n",
222                        CQE_STATUS(rsp_msg->cqe), qhp->wq.qpid);
223                 post_qp_event(rnicp, chp, rsp_msg, IB_EVENT_QP_FATAL, 1);
224                 break;
225         }
226 done:
227         if (atomic_dec_and_test(&chp->refcnt))
228                 wake_up(&chp->wait);
229         iwch_qp_rem_ref(&qhp->ibqp);
230 out:
231         dev_kfree_skb_irq(skb);
232 }