1 /* 2 * Copyright (c) 2009-2010 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/slab.h> 33 #include <linux/mman.h> 34 #include <net/sock.h> 35 36 #include "iw_cxgb4.h" 37 38 static void print_tpte(struct c4iw_dev *dev, u32 stag) 39 { 40 int ret; 41 struct fw_ri_tpte tpte; 42 43 ret = cxgb4_read_tpte(dev->rdev.lldi.ports[0], stag, 44 (__be32 *)&tpte); 45 if (ret) { 46 dev_err(&dev->rdev.lldi.pdev->dev, 47 "%s cxgb4_read_tpte err %d\n", __func__, ret); 48 return; 49 } 50 PDBG("stag idx 0x%x valid %d key 0x%x state %d pdid %d " 51 "perm 0x%x ps %d len 0x%llx va 0x%llx\n", 52 stag & 0xffffff00, 53 FW_RI_TPTE_VALID_G(ntohl(tpte.valid_to_pdid)), 54 FW_RI_TPTE_STAGKEY_G(ntohl(tpte.valid_to_pdid)), 55 FW_RI_TPTE_STAGSTATE_G(ntohl(tpte.valid_to_pdid)), 56 FW_RI_TPTE_PDID_G(ntohl(tpte.valid_to_pdid)), 57 FW_RI_TPTE_PERM_G(ntohl(tpte.locread_to_qpid)), 58 FW_RI_TPTE_PS_G(ntohl(tpte.locread_to_qpid)), 59 ((u64)ntohl(tpte.len_hi) << 32) | ntohl(tpte.len_lo), 60 ((u64)ntohl(tpte.va_hi) << 32) | ntohl(tpte.va_lo_fbo)); 61 } 62 63 static void dump_err_cqe(struct c4iw_dev *dev, struct t4_cqe *err_cqe) 64 { 65 __be64 *p = (void *)err_cqe; 66 67 dev_err(&dev->rdev.lldi.pdev->dev, 68 "AE qpid %d opcode %d status 0x%x " 69 "type %d len 0x%x wrid.hi 0x%x wrid.lo 0x%x\n", 70 CQE_QPID(err_cqe), CQE_OPCODE(err_cqe), 71 CQE_STATUS(err_cqe), CQE_TYPE(err_cqe), ntohl(err_cqe->len), 72 CQE_WRID_HI(err_cqe), CQE_WRID_LOW(err_cqe)); 73 74 PDBG("%016llx %016llx %016llx %016llx\n", 75 be64_to_cpu(p[0]), be64_to_cpu(p[1]), be64_to_cpu(p[2]), 76 be64_to_cpu(p[3])); 77 78 /* 79 * Ingress WRITE and READ_RESP errors provide 80 * the offending stag, so parse and log it. 81 */ 82 if (RQ_TYPE(err_cqe) && (CQE_OPCODE(err_cqe) == FW_RI_RDMA_WRITE || 83 CQE_OPCODE(err_cqe) == FW_RI_READ_RESP)) 84 print_tpte(dev, CQE_WRID_STAG(err_cqe)); 85 } 86 87 static void post_qp_event(struct c4iw_dev *dev, struct c4iw_cq *chp, 88 struct c4iw_qp *qhp, 89 struct t4_cqe *err_cqe, 90 enum ib_event_type ib_event) 91 { 92 struct ib_event event; 93 struct c4iw_qp_attributes attrs; 94 unsigned long flag; 95 96 dump_err_cqe(dev, err_cqe); 97 98 if (qhp->attr.state == C4IW_QP_STATE_RTS) { 99 attrs.next_state = C4IW_QP_STATE_TERMINATE; 100 c4iw_modify_qp(qhp->rhp, qhp, C4IW_QP_ATTR_NEXT_STATE, 101 &attrs, 0); 102 } 103 104 event.event = ib_event; 105 event.device = chp->ibcq.device; 106 if (ib_event == IB_EVENT_CQ_ERR) 107 event.element.cq = &chp->ibcq; 108 else 109 event.element.qp = &qhp->ibqp; 110 if (qhp->ibqp.event_handler) 111 (*qhp->ibqp.event_handler)(&event, qhp->ibqp.qp_context); 112 113 spin_lock_irqsave(&chp->comp_handler_lock, flag); 114 (*chp->ibcq.comp_handler)(&chp->ibcq, chp->ibcq.cq_context); 115 spin_unlock_irqrestore(&chp->comp_handler_lock, flag); 116 } 117 118 void c4iw_ev_dispatch(struct c4iw_dev *dev, struct t4_cqe *err_cqe) 119 { 120 struct c4iw_cq *chp; 121 struct c4iw_qp *qhp; 122 u32 cqid; 123 124 spin_lock_irq(&dev->lock); 125 qhp = get_qhp(dev, CQE_QPID(err_cqe)); 126 if (!qhp) { 127 printk(KERN_ERR MOD "BAD AE qpid 0x%x opcode %d " 128 "status 0x%x type %d wrid.hi 0x%x wrid.lo 0x%x\n", 129 CQE_QPID(err_cqe), 130 CQE_OPCODE(err_cqe), CQE_STATUS(err_cqe), 131 CQE_TYPE(err_cqe), CQE_WRID_HI(err_cqe), 132 CQE_WRID_LOW(err_cqe)); 133 spin_unlock_irq(&dev->lock); 134 goto out; 135 } 136 137 if (SQ_TYPE(err_cqe)) 138 cqid = qhp->attr.scq; 139 else 140 cqid = qhp->attr.rcq; 141 chp = get_chp(dev, cqid); 142 if (!chp) { 143 printk(KERN_ERR MOD "BAD AE cqid 0x%x qpid 0x%x opcode %d " 144 "status 0x%x type %d wrid.hi 0x%x wrid.lo 0x%x\n", 145 cqid, CQE_QPID(err_cqe), 146 CQE_OPCODE(err_cqe), CQE_STATUS(err_cqe), 147 CQE_TYPE(err_cqe), CQE_WRID_HI(err_cqe), 148 CQE_WRID_LOW(err_cqe)); 149 spin_unlock_irq(&dev->lock); 150 goto out; 151 } 152 153 c4iw_qp_add_ref(&qhp->ibqp); 154 atomic_inc(&chp->refcnt); 155 spin_unlock_irq(&dev->lock); 156 157 /* Bad incoming write */ 158 if (RQ_TYPE(err_cqe) && 159 (CQE_OPCODE(err_cqe) == FW_RI_RDMA_WRITE)) { 160 post_qp_event(dev, chp, qhp, err_cqe, IB_EVENT_QP_REQ_ERR); 161 goto done; 162 } 163 164 switch (CQE_STATUS(err_cqe)) { 165 166 /* Completion Events */ 167 case T4_ERR_SUCCESS: 168 printk(KERN_ERR MOD "AE with status 0!\n"); 169 break; 170 171 case T4_ERR_STAG: 172 case T4_ERR_PDID: 173 case T4_ERR_QPID: 174 case T4_ERR_ACCESS: 175 case T4_ERR_WRAP: 176 case T4_ERR_BOUND: 177 case T4_ERR_INVALIDATE_SHARED_MR: 178 case T4_ERR_INVALIDATE_MR_WITH_MW_BOUND: 179 post_qp_event(dev, chp, qhp, err_cqe, IB_EVENT_QP_ACCESS_ERR); 180 break; 181 182 /* Device Fatal Errors */ 183 case T4_ERR_ECC: 184 case T4_ERR_ECC_PSTAG: 185 case T4_ERR_INTERNAL_ERR: 186 post_qp_event(dev, chp, qhp, err_cqe, IB_EVENT_DEVICE_FATAL); 187 break; 188 189 /* QP Fatal Errors */ 190 case T4_ERR_OUT_OF_RQE: 191 case T4_ERR_PBL_ADDR_BOUND: 192 case T4_ERR_CRC: 193 case T4_ERR_MARKER: 194 case T4_ERR_PDU_LEN_ERR: 195 case T4_ERR_DDP_VERSION: 196 case T4_ERR_RDMA_VERSION: 197 case T4_ERR_OPCODE: 198 case T4_ERR_DDP_QUEUE_NUM: 199 case T4_ERR_MSN: 200 case T4_ERR_TBIT: 201 case T4_ERR_MO: 202 case T4_ERR_MSN_GAP: 203 case T4_ERR_MSN_RANGE: 204 case T4_ERR_RQE_ADDR_BOUND: 205 case T4_ERR_IRD_OVERFLOW: 206 post_qp_event(dev, chp, qhp, err_cqe, IB_EVENT_QP_FATAL); 207 break; 208 209 default: 210 printk(KERN_ERR MOD "Unknown T4 status 0x%x QPID 0x%x\n", 211 CQE_STATUS(err_cqe), qhp->wq.sq.qid); 212 post_qp_event(dev, chp, qhp, err_cqe, IB_EVENT_QP_FATAL); 213 break; 214 } 215 done: 216 if (atomic_dec_and_test(&chp->refcnt)) 217 wake_up(&chp->wait); 218 c4iw_qp_rem_ref(&qhp->ibqp); 219 out: 220 return; 221 } 222 223 int c4iw_ev_handler(struct c4iw_dev *dev, u32 qid) 224 { 225 struct c4iw_cq *chp; 226 unsigned long flag; 227 228 spin_lock_irqsave(&dev->lock, flag); 229 chp = get_chp(dev, qid); 230 if (chp) { 231 atomic_inc(&chp->refcnt); 232 spin_unlock_irqrestore(&dev->lock, flag); 233 t4_clear_cq_armed(&chp->cq); 234 spin_lock_irqsave(&chp->comp_handler_lock, flag); 235 (*chp->ibcq.comp_handler)(&chp->ibcq, chp->ibcq.cq_context); 236 spin_unlock_irqrestore(&chp->comp_handler_lock, flag); 237 if (atomic_dec_and_test(&chp->refcnt)) 238 wake_up(&chp->wait); 239 } else { 240 PDBG("%s unknown cqid 0x%x\n", __func__, qid); 241 spin_unlock_irqrestore(&dev->lock, flag); 242 } 243 return 0; 244 } 245