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 "iwch_provider.h"
33 #include "iwch.h"
34
35 /*
36 * Get one cq entry from cxio and map it to openib.
37 *
38 * Returns:
39 * 0 EMPTY;
40 * 1 cqe returned
41 * -EAGAIN caller must try again
42 * any other -errno fatal error
43 */
44 static int iwch_poll_cq_one(struct iwch_dev *rhp, struct iwch_cq *chp,
45 struct ib_wc *wc)
46 {
47 struct iwch_qp *qhp = NULL;
48 struct t3_cqe cqe, *rd_cqe;
49 struct t3_wq *wq;
50 u32 credit = 0;
51 u8 cqe_flushed;
52 u64 cookie;
53 int ret = 1;
54
55 rd_cqe = cxio_next_cqe(&chp->cq);
56
57 if (!rd_cqe)
58 return 0;
59
60 qhp = get_qhp(rhp, CQE_QPID(*rd_cqe));
61 if (!qhp)
62 wq = NULL;
63 else {
64 spin_lock(&qhp->lock);
65 wq = &(qhp->wq);
66 }
67 ret = cxio_poll_cq(wq, &(chp->cq), &cqe, &cqe_flushed, &cookie,
68 &credit);
69 if (t3a_device(chp->rhp) && credit) {
70 PDBG("%s updating %d cq credits on id %d\n", __func__,
71 credit, chp->cq.cqid);
72 cxio_hal_cq_op(&rhp->rdev, &chp->cq, CQ_CREDIT_UPDATE, credit);
73 }
74
75 if (ret) {
76 ret = -EAGAIN;
77 goto out;
78 }
79 ret = 1;
80
81 wc->wr_id = cookie;
82 wc->qp = &qhp->ibqp;
83 wc->vendor_err = CQE_STATUS(cqe);
84 wc->wc_flags = 0;
85
86 PDBG("%s qpid 0x%x type %d opcode %d status 0x%x wrid hi 0x%x "
87 "lo 0x%x cookie 0x%llx\n", __func__,
88 CQE_QPID(cqe), CQE_TYPE(cqe),
89 CQE_OPCODE(cqe), CQE_STATUS(cqe), CQE_WRID_HI(cqe),
90 CQE_WRID_LOW(cqe), (unsigned long long) cookie);
91
92 if (CQE_TYPE(cqe) == 0) {
93 if (!CQE_STATUS(cqe))
94 wc->byte_len = CQE_LEN(cqe);
95 else
96 wc->byte_len = 0;
97 wc->opcode = IB_WC_RECV;
98 if (CQE_OPCODE(cqe) == T3_SEND_WITH_INV ||
99 CQE_OPCODE(cqe) == T3_SEND_WITH_SE_INV) {
100 wc->ex.invalidate_rkey = CQE_WRID_STAG(cqe);
101 wc->wc_flags |= IB_WC_WITH_INVALIDATE;
102 }
103 } else {
104 switch (CQE_OPCODE(cqe)) {
105 case T3_RDMA_WRITE:
106 wc->opcode = IB_WC_RDMA_WRITE;
107 break;
108 case T3_READ_REQ:
109 wc->opcode = IB_WC_RDMA_READ;
110 wc->byte_len = CQE_LEN(cqe);
111 break;
112 case T3_SEND:
113 case T3_SEND_WITH_SE:
114 case T3_SEND_WITH_INV:
115 case T3_SEND_WITH_SE_INV:
116 wc->opcode = IB_WC_SEND;
117 break;
118 case T3_BIND_MW:
119 wc->opcode = IB_WC_BIND_MW;
120 break;
121
122 case T3_LOCAL_INV:
123 wc->opcode = IB_WC_LOCAL_INV;
124 break;
125 case T3_FAST_REGISTER:
126 wc->opcode = IB_WC_FAST_REG_MR;
127 break;
128 default:
129 printk(KERN_ERR MOD "Unexpected opcode %d "
130 "in the CQE received for QPID=0x%0x\n",
131 CQE_OPCODE(cqe), CQE_QPID(cqe));
132 ret = -EINVAL;
133 goto out;
134 }
135 }
136
137 if (cqe_flushed)
138 wc->status = IB_WC_WR_FLUSH_ERR;
139 else {
140
141 switch (CQE_STATUS(cqe)) {
142 case TPT_ERR_SUCCESS:
143 wc->status = IB_WC_SUCCESS;
144 break;
145 case TPT_ERR_STAG:
146 wc->status = IB_WC_LOC_ACCESS_ERR;
147 break;
148 case TPT_ERR_PDID:
149 wc->status = IB_WC_LOC_PROT_ERR;
150 break;
151 case TPT_ERR_QPID:
152 case TPT_ERR_ACCESS:
153 wc->status = IB_WC_LOC_ACCESS_ERR;
154 break;
155 case TPT_ERR_WRAP:
156 wc->status = IB_WC_GENERAL_ERR;
157 break;
158 case TPT_ERR_BOUND:
159 wc->status = IB_WC_LOC_LEN_ERR;
160 break;
161 case TPT_ERR_INVALIDATE_SHARED_MR:
162 case TPT_ERR_INVALIDATE_MR_WITH_MW_BOUND:
163 wc->status = IB_WC_MW_BIND_ERR;
164 break;
165 case TPT_ERR_CRC:
166 case TPT_ERR_MARKER:
167 case TPT_ERR_PDU_LEN_ERR:
168 case TPT_ERR_OUT_OF_RQE:
169 case TPT_ERR_DDP_VERSION:
170 case TPT_ERR_RDMA_VERSION:
171 case TPT_ERR_DDP_QUEUE_NUM:
172 case TPT_ERR_MSN:
173 case TPT_ERR_TBIT:
174 case TPT_ERR_MO:
175 case TPT_ERR_MSN_RANGE:
176 case TPT_ERR_IRD_OVERFLOW:
177 case TPT_ERR_OPCODE:
178 wc->status = IB_WC_FATAL_ERR;
179 break;
180 case TPT_ERR_SWFLUSH:
181 wc->status = IB_WC_WR_FLUSH_ERR;
182 break;
183 default:
184 printk(KERN_ERR MOD "Unexpected cqe_status 0x%x for "
185 "QPID=0x%0x\n", CQE_STATUS(cqe), CQE_QPID(cqe));
186 ret = -EINVAL;
187 }
188 }
189 out:
190 if (wq)
191 spin_unlock(&qhp->lock);
192 return ret;
193 }
194
195 int iwch_poll_cq(struct ib_cq *ibcq, int num_entries, struct ib_wc *wc)
196 {
197 struct iwch_dev *rhp;
198 struct iwch_cq *chp;
199 unsigned long flags;
200 int npolled;
201 int err = 0;
202
203 chp = to_iwch_cq(ibcq);
204 rhp = chp->rhp;
205
206 spin_lock_irqsave(&chp->lock, flags);
207 for (npolled = 0; npolled < num_entries; ++npolled) {
208 #ifdef DEBUG
209 int i=0;
210 #endif
211
212 /*
213 * Because T3 can post CQEs that are _not_ associated
214 * with a WR, we might have to poll again after removing
215 * one of these.
216 */
217 do {
218 err = iwch_poll_cq_one(rhp, chp, wc + npolled);
219 #ifdef DEBUG
220 BUG_ON(++i > 1000);
221 #endif
222 } while (err == -EAGAIN);
223 if (err <= 0)
224 break;
225 }
226 spin_unlock_irqrestore(&chp->lock, flags);
227
228 if (err < 0)
229 return err;
230 else {
231 return npolled;
232 }
233 }
234
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