1 // SPDX-License-Identifier: GPL-2.0 OR BSD-3-Clause 2 3 /* Authors: Cheng Xu <chengyou@linux.alibaba.com> */ 4 /* Kai Shen <kaishen@linux.alibaba.com> */ 5 /* Copyright (c) 2020-2022, Alibaba Group. */ 6 7 #include "erdma_verbs.h" 8 9 static void *get_next_valid_cqe(struct erdma_cq *cq) 10 { 11 __be32 *cqe = get_queue_entry(cq->kern_cq.qbuf, cq->kern_cq.ci, 12 cq->depth, CQE_SHIFT); 13 u32 owner = FIELD_GET(ERDMA_CQE_HDR_OWNER_MASK, 14 be32_to_cpu(READ_ONCE(*cqe))); 15 16 return owner ^ !!(cq->kern_cq.ci & cq->depth) ? cqe : NULL; 17 } 18 19 static void notify_cq(struct erdma_cq *cq, u8 solcitied) 20 { 21 u64 db_data = 22 FIELD_PREP(ERDMA_CQDB_IDX_MASK, (cq->kern_cq.notify_cnt)) | 23 FIELD_PREP(ERDMA_CQDB_CQN_MASK, cq->cqn) | 24 FIELD_PREP(ERDMA_CQDB_ARM_MASK, 1) | 25 FIELD_PREP(ERDMA_CQDB_SOL_MASK, solcitied) | 26 FIELD_PREP(ERDMA_CQDB_CMDSN_MASK, cq->kern_cq.cmdsn) | 27 FIELD_PREP(ERDMA_CQDB_CI_MASK, cq->kern_cq.ci); 28 29 *cq->kern_cq.db_record = db_data; 30 writeq(db_data, cq->kern_cq.db); 31 } 32 33 int erdma_req_notify_cq(struct ib_cq *ibcq, enum ib_cq_notify_flags flags) 34 { 35 struct erdma_cq *cq = to_ecq(ibcq); 36 unsigned long irq_flags; 37 int ret = 0; 38 39 spin_lock_irqsave(&cq->kern_cq.lock, irq_flags); 40 41 notify_cq(cq, (flags & IB_CQ_SOLICITED_MASK) == IB_CQ_SOLICITED); 42 43 if ((flags & IB_CQ_REPORT_MISSED_EVENTS) && get_next_valid_cqe(cq)) 44 ret = 1; 45 46 cq->kern_cq.notify_cnt++; 47 48 spin_unlock_irqrestore(&cq->kern_cq.lock, irq_flags); 49 50 return ret; 51 } 52 53 static const enum ib_wc_opcode wc_mapping_table[ERDMA_NUM_OPCODES] = { 54 [ERDMA_OP_WRITE] = IB_WC_RDMA_WRITE, 55 [ERDMA_OP_READ] = IB_WC_RDMA_READ, 56 [ERDMA_OP_SEND] = IB_WC_SEND, 57 [ERDMA_OP_SEND_WITH_IMM] = IB_WC_SEND, 58 [ERDMA_OP_RECEIVE] = IB_WC_RECV, 59 [ERDMA_OP_RECV_IMM] = IB_WC_RECV_RDMA_WITH_IMM, 60 [ERDMA_OP_RECV_INV] = IB_WC_RECV, 61 [ERDMA_OP_WRITE_WITH_IMM] = IB_WC_RDMA_WRITE, 62 [ERDMA_OP_RSP_SEND_IMM] = IB_WC_RECV, 63 [ERDMA_OP_SEND_WITH_INV] = IB_WC_SEND, 64 [ERDMA_OP_REG_MR] = IB_WC_REG_MR, 65 [ERDMA_OP_LOCAL_INV] = IB_WC_LOCAL_INV, 66 [ERDMA_OP_READ_WITH_INV] = IB_WC_RDMA_READ, 67 [ERDMA_OP_ATOMIC_CAS] = IB_WC_COMP_SWAP, 68 [ERDMA_OP_ATOMIC_FAA] = IB_WC_FETCH_ADD, 69 }; 70 71 static const struct { 72 enum erdma_wc_status erdma; 73 enum ib_wc_status base; 74 enum erdma_vendor_err vendor; 75 } map_cqe_status[ERDMA_NUM_WC_STATUS] = { 76 { ERDMA_WC_SUCCESS, IB_WC_SUCCESS, ERDMA_WC_VENDOR_NO_ERR }, 77 { ERDMA_WC_GENERAL_ERR, IB_WC_GENERAL_ERR, ERDMA_WC_VENDOR_NO_ERR }, 78 { ERDMA_WC_RECV_WQE_FORMAT_ERR, IB_WC_GENERAL_ERR, 79 ERDMA_WC_VENDOR_INVALID_RQE }, 80 { ERDMA_WC_RECV_STAG_INVALID_ERR, IB_WC_REM_ACCESS_ERR, 81 ERDMA_WC_VENDOR_RQE_INVALID_STAG }, 82 { ERDMA_WC_RECV_ADDR_VIOLATION_ERR, IB_WC_REM_ACCESS_ERR, 83 ERDMA_WC_VENDOR_RQE_ADDR_VIOLATION }, 84 { ERDMA_WC_RECV_RIGHT_VIOLATION_ERR, IB_WC_REM_ACCESS_ERR, 85 ERDMA_WC_VENDOR_RQE_ACCESS_RIGHT_ERR }, 86 { ERDMA_WC_RECV_PDID_ERR, IB_WC_REM_ACCESS_ERR, 87 ERDMA_WC_VENDOR_RQE_INVALID_PD }, 88 { ERDMA_WC_RECV_WARRPING_ERR, IB_WC_REM_ACCESS_ERR, 89 ERDMA_WC_VENDOR_RQE_WRAP_ERR }, 90 { ERDMA_WC_SEND_WQE_FORMAT_ERR, IB_WC_LOC_QP_OP_ERR, 91 ERDMA_WC_VENDOR_INVALID_SQE }, 92 { ERDMA_WC_SEND_WQE_ORD_EXCEED, IB_WC_GENERAL_ERR, 93 ERDMA_WC_VENDOR_ZERO_ORD }, 94 { ERDMA_WC_SEND_STAG_INVALID_ERR, IB_WC_LOC_ACCESS_ERR, 95 ERDMA_WC_VENDOR_SQE_INVALID_STAG }, 96 { ERDMA_WC_SEND_ADDR_VIOLATION_ERR, IB_WC_LOC_ACCESS_ERR, 97 ERDMA_WC_VENDOR_SQE_ADDR_VIOLATION }, 98 { ERDMA_WC_SEND_RIGHT_VIOLATION_ERR, IB_WC_LOC_ACCESS_ERR, 99 ERDMA_WC_VENDOR_SQE_ACCESS_ERR }, 100 { ERDMA_WC_SEND_PDID_ERR, IB_WC_LOC_ACCESS_ERR, 101 ERDMA_WC_VENDOR_SQE_INVALID_PD }, 102 { ERDMA_WC_SEND_WARRPING_ERR, IB_WC_LOC_ACCESS_ERR, 103 ERDMA_WC_VENDOR_SQE_WARP_ERR }, 104 { ERDMA_WC_FLUSH_ERR, IB_WC_WR_FLUSH_ERR, ERDMA_WC_VENDOR_NO_ERR }, 105 { ERDMA_WC_RETRY_EXC_ERR, IB_WC_RETRY_EXC_ERR, ERDMA_WC_VENDOR_NO_ERR }, 106 }; 107 108 #define ERDMA_POLLCQ_NO_QP 1 109 110 static int erdma_poll_one_cqe(struct erdma_cq *cq, struct ib_wc *wc) 111 { 112 struct erdma_dev *dev = to_edev(cq->ibcq.device); 113 u8 opcode, syndrome, qtype; 114 struct erdma_kqp *kern_qp; 115 struct erdma_cqe *cqe; 116 struct erdma_qp *qp; 117 u16 wqe_idx, depth; 118 u32 qpn, cqe_hdr; 119 u64 *id_table; 120 u64 *wqe_hdr; 121 122 cqe = get_next_valid_cqe(cq); 123 if (!cqe) 124 return -EAGAIN; 125 126 cq->kern_cq.ci++; 127 128 /* cqbuf should be ready when we poll */ 129 dma_rmb(); 130 131 qpn = be32_to_cpu(cqe->qpn); 132 wqe_idx = be32_to_cpu(cqe->qe_idx); 133 cqe_hdr = be32_to_cpu(cqe->hdr); 134 135 qp = find_qp_by_qpn(dev, qpn); 136 if (!qp) 137 return ERDMA_POLLCQ_NO_QP; 138 139 kern_qp = &qp->kern_qp; 140 141 qtype = FIELD_GET(ERDMA_CQE_HDR_QTYPE_MASK, cqe_hdr); 142 syndrome = FIELD_GET(ERDMA_CQE_HDR_SYNDROME_MASK, cqe_hdr); 143 opcode = FIELD_GET(ERDMA_CQE_HDR_OPCODE_MASK, cqe_hdr); 144 145 if (qtype == ERDMA_CQE_QTYPE_SQ) { 146 id_table = kern_qp->swr_tbl; 147 depth = qp->attrs.sq_size; 148 wqe_hdr = get_queue_entry(qp->kern_qp.sq_buf, wqe_idx, 149 qp->attrs.sq_size, SQEBB_SHIFT); 150 kern_qp->sq_ci = 151 FIELD_GET(ERDMA_SQE_HDR_WQEBB_CNT_MASK, *wqe_hdr) + 152 wqe_idx + 1; 153 } else { 154 id_table = kern_qp->rwr_tbl; 155 depth = qp->attrs.rq_size; 156 } 157 wc->wr_id = id_table[wqe_idx & (depth - 1)]; 158 wc->byte_len = be32_to_cpu(cqe->size); 159 160 wc->wc_flags = 0; 161 162 wc->opcode = wc_mapping_table[opcode]; 163 if (opcode == ERDMA_OP_RECV_IMM || opcode == ERDMA_OP_RSP_SEND_IMM) { 164 wc->ex.imm_data = cpu_to_be32(le32_to_cpu(cqe->imm_data)); 165 wc->wc_flags |= IB_WC_WITH_IMM; 166 } else if (opcode == ERDMA_OP_RECV_INV) { 167 wc->ex.invalidate_rkey = be32_to_cpu(cqe->inv_rkey); 168 wc->wc_flags |= IB_WC_WITH_INVALIDATE; 169 } 170 171 if (syndrome >= ERDMA_NUM_WC_STATUS) 172 syndrome = ERDMA_WC_GENERAL_ERR; 173 174 wc->status = map_cqe_status[syndrome].base; 175 wc->vendor_err = map_cqe_status[syndrome].vendor; 176 wc->qp = &qp->ibqp; 177 178 return 0; 179 } 180 181 int erdma_poll_cq(struct ib_cq *ibcq, int num_entries, struct ib_wc *wc) 182 { 183 struct erdma_cq *cq = to_ecq(ibcq); 184 unsigned long flags; 185 int npolled, ret; 186 187 spin_lock_irqsave(&cq->kern_cq.lock, flags); 188 189 for (npolled = 0; npolled < num_entries;) { 190 ret = erdma_poll_one_cqe(cq, wc + npolled); 191 192 if (ret == -EAGAIN) /* no received new CQEs. */ 193 break; 194 else if (ret) /* ignore invalid CQEs. */ 195 continue; 196 197 npolled++; 198 } 199 200 spin_unlock_irqrestore(&cq->kern_cq.lock, flags); 201 202 return npolled; 203 } 204