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