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b038ced7 SW |
1 | /* |
2 | * Copyright (c) 2006 Chelsio, Inc. All rights reserved. | |
b038ced7 SW |
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", __FUNCTION__, | |
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 | ||
85 | PDBG("%s qpid 0x%x type %d opcode %d status 0x%x wrid hi 0x%x " | |
86 | "lo 0x%x cookie 0x%llx\n", __FUNCTION__, | |
87 | CQE_QPID(cqe), CQE_TYPE(cqe), | |
88 | CQE_OPCODE(cqe), CQE_STATUS(cqe), CQE_WRID_HI(cqe), | |
89 | CQE_WRID_LOW(cqe), (unsigned long long) cookie); | |
90 | ||
91 | if (CQE_TYPE(cqe) == 0) { | |
92 | if (!CQE_STATUS(cqe)) | |
93 | wc->byte_len = CQE_LEN(cqe); | |
94 | else | |
95 | wc->byte_len = 0; | |
96 | wc->opcode = IB_WC_RECV; | |
97 | } else { | |
98 | switch (CQE_OPCODE(cqe)) { | |
99 | case T3_RDMA_WRITE: | |
100 | wc->opcode = IB_WC_RDMA_WRITE; | |
101 | break; | |
102 | case T3_READ_REQ: | |
103 | wc->opcode = IB_WC_RDMA_READ; | |
104 | wc->byte_len = CQE_LEN(cqe); | |
105 | break; | |
106 | case T3_SEND: | |
107 | case T3_SEND_WITH_SE: | |
108 | wc->opcode = IB_WC_SEND; | |
109 | break; | |
110 | case T3_BIND_MW: | |
111 | wc->opcode = IB_WC_BIND_MW; | |
112 | break; | |
113 | ||
114 | /* these aren't supported yet */ | |
115 | case T3_SEND_WITH_INV: | |
116 | case T3_SEND_WITH_SE_INV: | |
117 | case T3_LOCAL_INV: | |
118 | case T3_FAST_REGISTER: | |
119 | default: | |
120 | printk(KERN_ERR MOD "Unexpected opcode %d " | |
121 | "in the CQE received for QPID=0x%0x\n", | |
122 | CQE_OPCODE(cqe), CQE_QPID(cqe)); | |
123 | ret = -EINVAL; | |
124 | goto out; | |
125 | } | |
126 | } | |
127 | ||
128 | if (cqe_flushed) | |
129 | wc->status = IB_WC_WR_FLUSH_ERR; | |
130 | else { | |
131 | ||
132 | switch (CQE_STATUS(cqe)) { | |
133 | case TPT_ERR_SUCCESS: | |
134 | wc->status = IB_WC_SUCCESS; | |
135 | break; | |
136 | case TPT_ERR_STAG: | |
137 | wc->status = IB_WC_LOC_ACCESS_ERR; | |
138 | break; | |
139 | case TPT_ERR_PDID: | |
140 | wc->status = IB_WC_LOC_PROT_ERR; | |
141 | break; | |
142 | case TPT_ERR_QPID: | |
143 | case TPT_ERR_ACCESS: | |
144 | wc->status = IB_WC_LOC_ACCESS_ERR; | |
145 | break; | |
146 | case TPT_ERR_WRAP: | |
147 | wc->status = IB_WC_GENERAL_ERR; | |
148 | break; | |
149 | case TPT_ERR_BOUND: | |
150 | wc->status = IB_WC_LOC_LEN_ERR; | |
151 | break; | |
152 | case TPT_ERR_INVALIDATE_SHARED_MR: | |
153 | case TPT_ERR_INVALIDATE_MR_WITH_MW_BOUND: | |
154 | wc->status = IB_WC_MW_BIND_ERR; | |
155 | break; | |
156 | case TPT_ERR_CRC: | |
157 | case TPT_ERR_MARKER: | |
158 | case TPT_ERR_PDU_LEN_ERR: | |
159 | case TPT_ERR_OUT_OF_RQE: | |
160 | case TPT_ERR_DDP_VERSION: | |
161 | case TPT_ERR_RDMA_VERSION: | |
162 | case TPT_ERR_DDP_QUEUE_NUM: | |
163 | case TPT_ERR_MSN: | |
164 | case TPT_ERR_TBIT: | |
165 | case TPT_ERR_MO: | |
166 | case TPT_ERR_MSN_RANGE: | |
167 | case TPT_ERR_IRD_OVERFLOW: | |
168 | case TPT_ERR_OPCODE: | |
169 | wc->status = IB_WC_FATAL_ERR; | |
170 | break; | |
171 | case TPT_ERR_SWFLUSH: | |
172 | wc->status = IB_WC_WR_FLUSH_ERR; | |
173 | break; | |
174 | default: | |
175 | printk(KERN_ERR MOD "Unexpected cqe_status 0x%x for " | |
176 | "QPID=0x%0x\n", CQE_STATUS(cqe), CQE_QPID(cqe)); | |
177 | ret = -EINVAL; | |
178 | } | |
179 | } | |
180 | out: | |
181 | if (wq) | |
182 | spin_unlock(&qhp->lock); | |
183 | return ret; | |
184 | } | |
185 | ||
186 | int iwch_poll_cq(struct ib_cq *ibcq, int num_entries, struct ib_wc *wc) | |
187 | { | |
188 | struct iwch_dev *rhp; | |
189 | struct iwch_cq *chp; | |
190 | unsigned long flags; | |
191 | int npolled; | |
192 | int err = 0; | |
193 | ||
194 | chp = to_iwch_cq(ibcq); | |
195 | rhp = chp->rhp; | |
196 | ||
197 | spin_lock_irqsave(&chp->lock, flags); | |
198 | for (npolled = 0; npolled < num_entries; ++npolled) { | |
199 | #ifdef DEBUG | |
200 | int i=0; | |
201 | #endif | |
202 | ||
203 | /* | |
204 | * Because T3 can post CQEs that are _not_ associated | |
205 | * with a WR, we might have to poll again after removing | |
206 | * one of these. | |
207 | */ | |
208 | do { | |
209 | err = iwch_poll_cq_one(rhp, chp, wc + npolled); | |
210 | #ifdef DEBUG | |
211 | BUG_ON(++i > 1000); | |
212 | #endif | |
213 | } while (err == -EAGAIN); | |
214 | if (err <= 0) | |
215 | break; | |
216 | } | |
217 | spin_unlock_irqrestore(&chp->lock, flags); | |
218 | ||
219 | if (err < 0) | |
220 | return err; | |
221 | else { | |
222 | return npolled; | |
223 | } | |
224 | } |