Steve Wise | b038ced | 2007-02-12 16:16:18 -0800 | [diff] [blame] | 1 | /* |
| 2 | * Copyright (c) 2006 Chelsio, Inc. All rights reserved. |
Steve Wise | b038ced | 2007-02-12 16:16:18 -0800 | [diff] [blame] | 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 | } |