diff options
Diffstat (limited to 'drivers/staging/rdma/hfi1/uc.c')
| -rw-r--r-- | drivers/staging/rdma/hfi1/uc.c | 604 |
1 files changed, 0 insertions, 604 deletions
diff --git a/drivers/staging/rdma/hfi1/uc.c b/drivers/staging/rdma/hfi1/uc.c deleted file mode 100644 index df773d433297..000000000000 --- a/drivers/staging/rdma/hfi1/uc.c +++ /dev/null @@ -1,604 +0,0 @@ -/* - * Copyright(c) 2015, 2016 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) IB_OPCODE_UC_##x - -/* only opcode mask for adaptive pio */ -const u32 uc_only_opcode = - BIT(OP(SEND_ONLY) & 0x1f) | - BIT(OP(SEND_ONLY_WITH_IMMEDIATE & 0x1f)) | - BIT(OP(RDMA_WRITE_ONLY & 0x1f)) | - BIT(OP(RDMA_WRITE_ONLY_WITH_IMMEDIATE & 0x1f)); - -/** - * 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 hfi1_other_headers *ohdr; - struct rvt_swqe *wqe; - u32 hwords = 5; - u32 bth0 = 0; - u32 len; - u32 pmtu = qp->pmtu; - int middle = 0; - - ps->s_txreq = get_txreq(ps->dev, qp); - if (IS_ERR(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. */ - smp_read_barrier_depends(); /* see post_one_send() */ - if (qp->s_last == ACCESS_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); - hfi1_send_complete(qp, wqe, IB_WC_WR_FLUSH_ERR); - goto done_free_tx; - } - - ohdr = &ps->s_txreq->phdr.hdr.u.oth; - if (qp->remote_ah_attr.ah_flags & IB_AH_GRH) - ohdr = &ps->s_txreq->phdr.hdr.u.l.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. */ - smp_read_barrier_depends(); /* see post_one_send() */ - if (qp->s_cur == ACCESS_ONCE(qp->s_head)) { - clear_ahg(qp); - goto bail; - } - /* - * 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; - qp->s_hdrwords = hwords; - ps->s_txreq->sde = priv->s_sde; - qp->s_cur_sge = &qp->s_sge; - qp->s_cur_size = len; - hfi1_make_ruc_header(qp, ohdr, bth0 | (qp->s_state << 24), - mask_psn(qp->s_psn++), middle, ps); - /* pbc */ - ps->s_txreq->hdr_dwords = qp->s_hdrwords + 2; - 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; - qp->s_hdrwords = 0; - 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 = &packet->rcd->ppd->ibport_data; - struct hfi1_ib_header *hdr = packet->hdr; - u32 rcv_flags = packet->rcv_flags; - void *data = packet->ebuf; - u32 tlen = packet->tlen; - struct rvt_qp *qp = packet->qp; - struct hfi1_other_headers *ohdr = packet->ohdr; - u32 bth0, opcode; - u32 hdrsize = packet->hlen; - u32 psn; - u32 pad; - struct ib_wc wc; - u32 pmtu = qp->pmtu; - struct ib_reth *reth; - int has_grh = rcv_flags & HFI1_HAS_GRH; - int ret; - u32 bth1; - - bth0 = be32_to_cpu(ohdr->bth[0]); - if (hfi1_ruc_check_hdr(ibp, hdr, has_grh, qp, bth0)) - return; - - bth1 = be32_to_cpu(ohdr->bth[1]); - if (unlikely(bth1 & (HFI1_BECN_SMASK | HFI1_FECN_SMASK))) { - if (bth1 & HFI1_BECN_SMASK) { - struct hfi1_pportdata *ppd = ppd_from_ibp(ibp); - u32 rqpn, lqpn; - u16 rlid = be16_to_cpu(hdr->lrh[3]); - u8 sl, sc5; - - lqpn = bth1 & RVT_QPN_MASK; - rqpn = qp->remote_qpn; - - sc5 = ibp->sl_to_sc[qp->remote_ah_attr.sl]; - sl = ibp->sc_to_sl[sc5]; - - process_becn(ppd, sl, rlid, lqpn, rqpn, - IB_CC_SVCTYPE_UC); - } - - if (bth1 & HFI1_FECN_SMASK) { - struct ib_grh *grh = NULL; - u16 pkey = (u16)be32_to_cpu(ohdr->bth[0]); - u16 slid = be16_to_cpu(hdr->lrh[3]); - u16 dlid = be16_to_cpu(hdr->lrh[1]); - u32 src_qp = qp->remote_qpn; - u8 sc5; - - sc5 = ibp->sl_to_sc[qp->remote_ah_attr.sl]; - if (has_grh) - grh = &hdr->u.l.grh; - - return_cnp(ibp, qp, src_qp, pkey, dlid, slid, sc5, - grh); - } - } - - psn = be32_to_cpu(ohdr->bth[2]); - opcode = (bth0 >> 24) & 0xff; - - /* 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)) - qp_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 = hfi1_rvt_get_rwqe(qp, 0); - 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. */ - if (unlikely(tlen != (hdrsize + pmtu + 4))) - goto rewind; - qp->r_rcv_len += pmtu; - if (unlikely(qp->r_rcv_len > qp->r_len)) - goto rewind; - hfi1_copy_sge(&qp->r_sge, data, pmtu, 0, 0); - 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: - /* Get the number of bytes the message was padded by. */ - pad = (be32_to_cpu(ohdr->bth[0]) >> 20) & 3; - /* Check for invalid length. */ - /* LAST len should be >= 1 */ - if (unlikely(tlen < (hdrsize + pad + 4))) - goto rewind; - /* Don't count the CRC. */ - tlen -= (hdrsize + pad + 4); - wc.byte_len = tlen + qp->r_rcv_len; - if (unlikely(wc.byte_len > qp->r_len)) - goto rewind; - wc.opcode = IB_WC_RECV; - hfi1_copy_sge(&qp->r_sge, data, tlen, 0, 0); - 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 = qp->remote_ah_attr.dlid; - /* - * 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 = qp->remote_ah_attr.sl; - /* 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_cq_enter(ibcq_to_rvtcq(qp->ibqp.recv_cq), &wc, - (ohdr->bth[0] & - cpu_to_be32(IB_BTH_SOLICITED)) != 0); - 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; - hfi1_copy_sge(&qp->r_sge, data, pmtu, 1, 0); - 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; - - /* Get the number of bytes the message was padded by. */ - pad = (be32_to_cpu(ohdr->bth[0]) >> 20) & 3; - /* Check for invalid length. */ - /* LAST len should be >= 1 */ - if (unlikely(tlen < (hdrsize + pad + 4))) - goto drop; - /* Don't count the CRC. */ - tlen -= (hdrsize + pad + 4); - 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 = hfi1_rvt_get_rwqe(qp, 1); - if (ret < 0) - goto op_err; - if (!ret) - goto drop; - } - wc.byte_len = qp->r_len; - wc.opcode = IB_WC_RECV_RDMA_WITH_IMM; - hfi1_copy_sge(&qp->r_sge, data, tlen, 1, 0); - rvt_put_ss(&qp->r_sge); - goto last_imm; - - case OP(RDMA_WRITE_LAST): -rdma_last: - /* Get the number of bytes the message was padded by. */ - pad = (be32_to_cpu(ohdr->bth[0]) >> 20) & 3; - /* Check for invalid length. */ - /* LAST len should be >= 1 */ - if (unlikely(tlen < (hdrsize + pad + 4))) - goto drop; - /* Don't count the CRC. */ - tlen -= (hdrsize + pad + 4); - if (unlikely(tlen + qp->r_rcv_len != qp->r_len)) - goto drop; - hfi1_copy_sge(&qp->r_sge, data, tlen, 1, 0); - 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: - hfi1_rc_error(qp, IB_WC_LOC_QP_OP_ERR); -} |