diff options
Diffstat (limited to '')
| -rw-r--r-- | drivers/infiniband/hw/hfi1/uc.c | 588 |
1 files changed, 588 insertions, 0 deletions
diff --git a/drivers/infiniband/hw/hfi1/uc.c b/drivers/infiniband/hw/hfi1/uc.c new file mode 100644 index 000000000..1fb918399 --- /dev/null +++ b/drivers/infiniband/hw/hfi1/uc.c @@ -0,0 +1,588 @@ +/* + * Copyright(c) 2015 - 2018 Intel Corporation. + * + * This file is provided under a dual BSD/GPLv2 license. When using or + * redistributing this file, you may do so under either license. + * + * GPL LICENSE SUMMARY + * + * This program is free software; you can redistribute it and/or modify + * it under the terms of version 2 of the GNU General Public License as + * published by the Free Software Foundation. + * + * This program is distributed in the hope that it will be useful, but + * WITHOUT ANY WARRANTY; without even the implied warranty of + * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU + * General Public License for more details. + * + * BSD LICENSE + * + * Redistribution and use in source and binary forms, with or without + * modification, are permitted provided that the following conditions + * are met: + * + * - Redistributions of source code must retain the above copyright + * notice, this list of conditions and the following disclaimer. + * - Redistributions in binary form must reproduce the above copyright + * notice, this list of conditions and the following disclaimer in + * the documentation and/or other materials provided with the + * distribution. + * - Neither the name of Intel Corporation nor the names of its + * contributors may be used to endorse or promote products derived + * from this software without specific prior written permission. + * + * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS + * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT + * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR + * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT + * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, + * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT + * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, + * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY + * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT + * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE + * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. + * + */ + +#include "hfi.h" +#include "verbs_txreq.h" +#include "qp.h" + +/* cut down ridiculously long IB macro names */ +#define OP(x) UC_OP(x) + +/** + * hfi1_make_uc_req - construct a request packet (SEND, RDMA write) + * @qp: a pointer to the QP + * + * Assume s_lock is held. + * + * Return 1 if constructed; otherwise, return 0. + */ +int hfi1_make_uc_req(struct rvt_qp *qp, struct hfi1_pkt_state *ps) +{ + struct hfi1_qp_priv *priv = qp->priv; + struct ib_other_headers *ohdr; + struct rvt_swqe *wqe; + u32 hwords; + u32 bth0 = 0; + u32 len; + u32 pmtu = qp->pmtu; + int middle = 0; + + ps->s_txreq = get_txreq(ps->dev, qp); + if (!ps->s_txreq) + goto bail_no_tx; + + if (!(ib_rvt_state_ops[qp->state] & RVT_PROCESS_SEND_OK)) { + if (!(ib_rvt_state_ops[qp->state] & RVT_FLUSH_SEND)) + goto bail; + /* We are in the error state, flush the work request. */ + if (qp->s_last == READ_ONCE(qp->s_head)) + goto bail; + /* If DMAs are in progress, we can't flush immediately. */ + if (iowait_sdma_pending(&priv->s_iowait)) { + qp->s_flags |= RVT_S_WAIT_DMA; + goto bail; + } + clear_ahg(qp); + wqe = rvt_get_swqe_ptr(qp, qp->s_last); + rvt_send_complete(qp, wqe, IB_WC_WR_FLUSH_ERR); + goto done_free_tx; + } + + if (priv->hdr_type == HFI1_PKT_TYPE_9B) { + /* header size in 32-bit words LRH+BTH = (8+12)/4. */ + hwords = 5; + if (rdma_ah_get_ah_flags(&qp->remote_ah_attr) & IB_AH_GRH) + ohdr = &ps->s_txreq->phdr.hdr.ibh.u.l.oth; + else + ohdr = &ps->s_txreq->phdr.hdr.ibh.u.oth; + } else { + /* header size in 32-bit words 16B LRH+BTH = (16+12)/4. */ + hwords = 7; + if ((rdma_ah_get_ah_flags(&qp->remote_ah_attr) & IB_AH_GRH) && + (hfi1_check_mcast(rdma_ah_get_dlid(&qp->remote_ah_attr)))) + ohdr = &ps->s_txreq->phdr.hdr.opah.u.l.oth; + else + ohdr = &ps->s_txreq->phdr.hdr.opah.u.oth; + } + + /* Get the next send request. */ + wqe = rvt_get_swqe_ptr(qp, qp->s_cur); + qp->s_wqe = NULL; + switch (qp->s_state) { + default: + if (!(ib_rvt_state_ops[qp->state] & + RVT_PROCESS_NEXT_SEND_OK)) + goto bail; + /* Check if send work queue is empty. */ + if (qp->s_cur == READ_ONCE(qp->s_head)) { + clear_ahg(qp); + goto bail; + } + /* + * Local operations are processed immediately + * after all prior requests have completed. + */ + if (wqe->wr.opcode == IB_WR_REG_MR || + wqe->wr.opcode == IB_WR_LOCAL_INV) { + int local_ops = 0; + int err = 0; + + if (qp->s_last != qp->s_cur) + goto bail; + if (++qp->s_cur == qp->s_size) + qp->s_cur = 0; + if (!(wqe->wr.send_flags & RVT_SEND_COMPLETION_ONLY)) { + err = rvt_invalidate_rkey( + qp, wqe->wr.ex.invalidate_rkey); + local_ops = 1; + } + rvt_send_complete(qp, wqe, err ? IB_WC_LOC_PROT_ERR + : IB_WC_SUCCESS); + if (local_ops) + atomic_dec(&qp->local_ops_pending); + goto done_free_tx; + } + /* + * Start a new request. + */ + qp->s_psn = wqe->psn; + qp->s_sge.sge = wqe->sg_list[0]; + qp->s_sge.sg_list = wqe->sg_list + 1; + qp->s_sge.num_sge = wqe->wr.num_sge; + qp->s_sge.total_len = wqe->length; + len = wqe->length; + qp->s_len = len; + switch (wqe->wr.opcode) { + case IB_WR_SEND: + case IB_WR_SEND_WITH_IMM: + if (len > pmtu) { + qp->s_state = OP(SEND_FIRST); + len = pmtu; + break; + } + if (wqe->wr.opcode == IB_WR_SEND) { + qp->s_state = OP(SEND_ONLY); + } else { + qp->s_state = + OP(SEND_ONLY_WITH_IMMEDIATE); + /* Immediate data comes after the BTH */ + ohdr->u.imm_data = wqe->wr.ex.imm_data; + hwords += 1; + } + if (wqe->wr.send_flags & IB_SEND_SOLICITED) + bth0 |= IB_BTH_SOLICITED; + qp->s_wqe = wqe; + if (++qp->s_cur >= qp->s_size) + qp->s_cur = 0; + break; + + case IB_WR_RDMA_WRITE: + case IB_WR_RDMA_WRITE_WITH_IMM: + ohdr->u.rc.reth.vaddr = + cpu_to_be64(wqe->rdma_wr.remote_addr); + ohdr->u.rc.reth.rkey = + cpu_to_be32(wqe->rdma_wr.rkey); + ohdr->u.rc.reth.length = cpu_to_be32(len); + hwords += sizeof(struct ib_reth) / 4; + if (len > pmtu) { + qp->s_state = OP(RDMA_WRITE_FIRST); + len = pmtu; + break; + } + if (wqe->wr.opcode == IB_WR_RDMA_WRITE) { + qp->s_state = OP(RDMA_WRITE_ONLY); + } else { + qp->s_state = + OP(RDMA_WRITE_ONLY_WITH_IMMEDIATE); + /* Immediate data comes after the RETH */ + ohdr->u.rc.imm_data = wqe->wr.ex.imm_data; + hwords += 1; + if (wqe->wr.send_flags & IB_SEND_SOLICITED) + bth0 |= IB_BTH_SOLICITED; + } + qp->s_wqe = wqe; + if (++qp->s_cur >= qp->s_size) + qp->s_cur = 0; + break; + + default: + goto bail; + } + break; + + case OP(SEND_FIRST): + qp->s_state = OP(SEND_MIDDLE); + fallthrough; + case OP(SEND_MIDDLE): + len = qp->s_len; + if (len > pmtu) { + len = pmtu; + middle = HFI1_CAP_IS_KSET(SDMA_AHG); + break; + } + if (wqe->wr.opcode == IB_WR_SEND) { + qp->s_state = OP(SEND_LAST); + } else { + qp->s_state = OP(SEND_LAST_WITH_IMMEDIATE); + /* Immediate data comes after the BTH */ + ohdr->u.imm_data = wqe->wr.ex.imm_data; + hwords += 1; + } + if (wqe->wr.send_flags & IB_SEND_SOLICITED) + bth0 |= IB_BTH_SOLICITED; + qp->s_wqe = wqe; + if (++qp->s_cur >= qp->s_size) + qp->s_cur = 0; + break; + + case OP(RDMA_WRITE_FIRST): + qp->s_state = OP(RDMA_WRITE_MIDDLE); + fallthrough; + case OP(RDMA_WRITE_MIDDLE): + len = qp->s_len; + if (len > pmtu) { + len = pmtu; + middle = HFI1_CAP_IS_KSET(SDMA_AHG); + break; + } + if (wqe->wr.opcode == IB_WR_RDMA_WRITE) { + qp->s_state = OP(RDMA_WRITE_LAST); + } else { + qp->s_state = + OP(RDMA_WRITE_LAST_WITH_IMMEDIATE); + /* Immediate data comes after the BTH */ + ohdr->u.imm_data = wqe->wr.ex.imm_data; + hwords += 1; + if (wqe->wr.send_flags & IB_SEND_SOLICITED) + bth0 |= IB_BTH_SOLICITED; + } + qp->s_wqe = wqe; + if (++qp->s_cur >= qp->s_size) + qp->s_cur = 0; + break; + } + qp->s_len -= len; + ps->s_txreq->hdr_dwords = hwords; + ps->s_txreq->sde = priv->s_sde; + ps->s_txreq->ss = &qp->s_sge; + ps->s_txreq->s_cur_size = len; + hfi1_make_ruc_header(qp, ohdr, bth0 | (qp->s_state << 24), + qp->remote_qpn, mask_psn(qp->s_psn++), + middle, ps); + return 1; + +done_free_tx: + hfi1_put_txreq(ps->s_txreq); + ps->s_txreq = NULL; + return 1; + +bail: + hfi1_put_txreq(ps->s_txreq); + +bail_no_tx: + ps->s_txreq = NULL; + qp->s_flags &= ~RVT_S_BUSY; + return 0; +} + +/** + * hfi1_uc_rcv - handle an incoming UC packet + * @ibp: the port the packet came in on + * @hdr: the header of the packet + * @rcv_flags: flags relevant to rcv processing + * @data: the packet data + * @tlen: the length of the packet + * @qp: the QP for this packet. + * + * This is called from qp_rcv() to process an incoming UC packet + * for the given QP. + * Called at interrupt level. + */ +void hfi1_uc_rcv(struct hfi1_packet *packet) +{ + struct hfi1_ibport *ibp = rcd_to_iport(packet->rcd); + void *data = packet->payload; + u32 tlen = packet->tlen; + struct rvt_qp *qp = packet->qp; + struct ib_other_headers *ohdr = packet->ohdr; + u32 opcode = packet->opcode; + u32 hdrsize = packet->hlen; + u32 psn; + u32 pad = packet->pad; + struct ib_wc wc; + u32 pmtu = qp->pmtu; + struct ib_reth *reth; + int ret; + u8 extra_bytes = pad + packet->extra_byte + (SIZE_OF_CRC << 2); + + if (hfi1_ruc_check_hdr(ibp, packet)) + return; + + process_ecn(qp, packet); + + psn = ib_bth_get_psn(ohdr); + /* Compare the PSN verses the expected PSN. */ + if (unlikely(cmp_psn(psn, qp->r_psn) != 0)) { + /* + * Handle a sequence error. + * Silently drop any current message. + */ + qp->r_psn = psn; +inv: + if (qp->r_state == OP(SEND_FIRST) || + qp->r_state == OP(SEND_MIDDLE)) { + set_bit(RVT_R_REWIND_SGE, &qp->r_aflags); + qp->r_sge.num_sge = 0; + } else { + rvt_put_ss(&qp->r_sge); + } + qp->r_state = OP(SEND_LAST); + switch (opcode) { + case OP(SEND_FIRST): + case OP(SEND_ONLY): + case OP(SEND_ONLY_WITH_IMMEDIATE): + goto send_first; + + case OP(RDMA_WRITE_FIRST): + case OP(RDMA_WRITE_ONLY): + case OP(RDMA_WRITE_ONLY_WITH_IMMEDIATE): + goto rdma_first; + + default: + goto drop; + } + } + + /* Check for opcode sequence errors. */ + switch (qp->r_state) { + case OP(SEND_FIRST): + case OP(SEND_MIDDLE): + if (opcode == OP(SEND_MIDDLE) || + opcode == OP(SEND_LAST) || + opcode == OP(SEND_LAST_WITH_IMMEDIATE)) + break; + goto inv; + + case OP(RDMA_WRITE_FIRST): + case OP(RDMA_WRITE_MIDDLE): + if (opcode == OP(RDMA_WRITE_MIDDLE) || + opcode == OP(RDMA_WRITE_LAST) || + opcode == OP(RDMA_WRITE_LAST_WITH_IMMEDIATE)) + break; + goto inv; + + default: + if (opcode == OP(SEND_FIRST) || + opcode == OP(SEND_ONLY) || + opcode == OP(SEND_ONLY_WITH_IMMEDIATE) || + opcode == OP(RDMA_WRITE_FIRST) || + opcode == OP(RDMA_WRITE_ONLY) || + opcode == OP(RDMA_WRITE_ONLY_WITH_IMMEDIATE)) + break; + goto inv; + } + + if (qp->state == IB_QPS_RTR && !(qp->r_flags & RVT_R_COMM_EST)) + rvt_comm_est(qp); + + /* OK, process the packet. */ + switch (opcode) { + case OP(SEND_FIRST): + case OP(SEND_ONLY): + case OP(SEND_ONLY_WITH_IMMEDIATE): +send_first: + if (test_and_clear_bit(RVT_R_REWIND_SGE, &qp->r_aflags)) { + qp->r_sge = qp->s_rdma_read_sge; + } else { + ret = rvt_get_rwqe(qp, false); + if (ret < 0) + goto op_err; + if (!ret) + goto drop; + /* + * qp->s_rdma_read_sge will be the owner + * of the mr references. + */ + qp->s_rdma_read_sge = qp->r_sge; + } + qp->r_rcv_len = 0; + if (opcode == OP(SEND_ONLY)) + goto no_immediate_data; + else if (opcode == OP(SEND_ONLY_WITH_IMMEDIATE)) + goto send_last_imm; + fallthrough; + case OP(SEND_MIDDLE): + /* Check for invalid length PMTU or posted rwqe len. */ + /* + * There will be no padding for 9B packet but 16B packets + * will come in with some padding since we always add + * CRC and LT bytes which will need to be flit aligned + */ + if (unlikely(tlen != (hdrsize + pmtu + extra_bytes))) + goto rewind; + qp->r_rcv_len += pmtu; + if (unlikely(qp->r_rcv_len > qp->r_len)) + goto rewind; + rvt_copy_sge(qp, &qp->r_sge, data, pmtu, false, false); + break; + + case OP(SEND_LAST_WITH_IMMEDIATE): +send_last_imm: + wc.ex.imm_data = ohdr->u.imm_data; + wc.wc_flags = IB_WC_WITH_IMM; + goto send_last; + case OP(SEND_LAST): +no_immediate_data: + wc.ex.imm_data = 0; + wc.wc_flags = 0; +send_last: + /* Check for invalid length. */ + /* LAST len should be >= 1 */ + if (unlikely(tlen < (hdrsize + extra_bytes))) + goto rewind; + /* Don't count the CRC. */ + tlen -= (hdrsize + extra_bytes); + wc.byte_len = tlen + qp->r_rcv_len; + if (unlikely(wc.byte_len > qp->r_len)) + goto rewind; + wc.opcode = IB_WC_RECV; + rvt_copy_sge(qp, &qp->r_sge, data, tlen, false, false); + rvt_put_ss(&qp->s_rdma_read_sge); +last_imm: + wc.wr_id = qp->r_wr_id; + wc.status = IB_WC_SUCCESS; + wc.qp = &qp->ibqp; + wc.src_qp = qp->remote_qpn; + wc.slid = rdma_ah_get_dlid(&qp->remote_ah_attr) & U16_MAX; + /* + * It seems that IB mandates the presence of an SL in a + * work completion only for the UD transport (see section + * 11.4.2 of IBTA Vol. 1). + * + * However, the way the SL is chosen below is consistent + * with the way that IB/qib works and is trying avoid + * introducing incompatibilities. + * + * See also OPA Vol. 1, section 9.7.6, and table 9-17. + */ + wc.sl = rdma_ah_get_sl(&qp->remote_ah_attr); + /* zero fields that are N/A */ + wc.vendor_err = 0; + wc.pkey_index = 0; + wc.dlid_path_bits = 0; + wc.port_num = 0; + /* Signal completion event if the solicited bit is set. */ + rvt_recv_cq(qp, &wc, ib_bth_is_solicited(ohdr)); + break; + + case OP(RDMA_WRITE_FIRST): + case OP(RDMA_WRITE_ONLY): + case OP(RDMA_WRITE_ONLY_WITH_IMMEDIATE): /* consume RWQE */ +rdma_first: + if (unlikely(!(qp->qp_access_flags & + IB_ACCESS_REMOTE_WRITE))) { + goto drop; + } + reth = &ohdr->u.rc.reth; + qp->r_len = be32_to_cpu(reth->length); + qp->r_rcv_len = 0; + qp->r_sge.sg_list = NULL; + if (qp->r_len != 0) { + u32 rkey = be32_to_cpu(reth->rkey); + u64 vaddr = be64_to_cpu(reth->vaddr); + int ok; + + /* Check rkey */ + ok = rvt_rkey_ok(qp, &qp->r_sge.sge, qp->r_len, + vaddr, rkey, IB_ACCESS_REMOTE_WRITE); + if (unlikely(!ok)) + goto drop; + qp->r_sge.num_sge = 1; + } else { + qp->r_sge.num_sge = 0; + qp->r_sge.sge.mr = NULL; + qp->r_sge.sge.vaddr = NULL; + qp->r_sge.sge.length = 0; + qp->r_sge.sge.sge_length = 0; + } + if (opcode == OP(RDMA_WRITE_ONLY)) { + goto rdma_last; + } else if (opcode == OP(RDMA_WRITE_ONLY_WITH_IMMEDIATE)) { + wc.ex.imm_data = ohdr->u.rc.imm_data; + goto rdma_last_imm; + } + fallthrough; + case OP(RDMA_WRITE_MIDDLE): + /* Check for invalid length PMTU or posted rwqe len. */ + if (unlikely(tlen != (hdrsize + pmtu + 4))) + goto drop; + qp->r_rcv_len += pmtu; + if (unlikely(qp->r_rcv_len > qp->r_len)) + goto drop; + rvt_copy_sge(qp, &qp->r_sge, data, pmtu, true, false); + break; + + case OP(RDMA_WRITE_LAST_WITH_IMMEDIATE): + wc.ex.imm_data = ohdr->u.imm_data; +rdma_last_imm: + wc.wc_flags = IB_WC_WITH_IMM; + + /* Check for invalid length. */ + /* LAST len should be >= 1 */ + if (unlikely(tlen < (hdrsize + pad + 4))) + goto drop; + /* Don't count the CRC. */ + tlen -= (hdrsize + extra_bytes); + if (unlikely(tlen + qp->r_rcv_len != qp->r_len)) + goto drop; + if (test_and_clear_bit(RVT_R_REWIND_SGE, &qp->r_aflags)) { + rvt_put_ss(&qp->s_rdma_read_sge); + } else { + ret = rvt_get_rwqe(qp, true); + if (ret < 0) + goto op_err; + if (!ret) + goto drop; + } + wc.byte_len = qp->r_len; + wc.opcode = IB_WC_RECV_RDMA_WITH_IMM; + rvt_copy_sge(qp, &qp->r_sge, data, tlen, true, false); + rvt_put_ss(&qp->r_sge); + goto last_imm; + + case OP(RDMA_WRITE_LAST): +rdma_last: + /* Check for invalid length. */ + /* LAST len should be >= 1 */ + if (unlikely(tlen < (hdrsize + pad + 4))) + goto drop; + /* Don't count the CRC. */ + tlen -= (hdrsize + extra_bytes); + if (unlikely(tlen + qp->r_rcv_len != qp->r_len)) + goto drop; + rvt_copy_sge(qp, &qp->r_sge, data, tlen, true, false); + rvt_put_ss(&qp->r_sge); + break; + + default: + /* Drop packet for unknown opcodes. */ + goto drop; + } + qp->r_psn++; + qp->r_state = opcode; + return; + +rewind: + set_bit(RVT_R_REWIND_SGE, &qp->r_aflags); + qp->r_sge.num_sge = 0; +drop: + ibp->rvp.n_pkt_drops++; + return; + +op_err: + rvt_rc_error(qp, IB_WC_LOC_QP_OP_ERR); +} |