Orange Pi5 kernel

/*
 * Copyright (c) 2006, 2007, 2008, 2009, 2010 QLogic Corporation.
 * All rights reserved.
 * Copyright (c) 2005, 2006 PathScale, Inc. All rights reserved.
 *
 * This software is available to you under a choice of one of two
 * licenses.  You may choose to be licensed under the terms of the GNU
 * General Public License (GPL) Version 2, available from the file
 * COPYING in the main directory of this source tree, or the
 * OpenIB.org BSD license below:
 *
 *     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.
 *
 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
 * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
 * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
 * NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS
 * BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN
 * ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
 * CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
 * SOFTWARE.
 */
 
#include "qib.h"
 
/* cut down ridiculously long IB macro names */
#define OP(x) IB_OPCODE_UC_##x
 
/**
 * qib_make_uc_req - construct a request packet (SEND, RDMA write)
 * @qp: a pointer to the QP
 *
 * Assumes the s_lock is held.
 *
 * Return 1 if constructed; otherwise, return 0.
 */
int qib_make_uc_req(struct rvt_qp *qp, unsigned long *flags)
{
<------>struct qib_qp_priv *priv = qp->priv;
<------>struct ib_other_headers *ohdr;
<------>struct rvt_swqe *wqe;
<------>u32 hwords;
<------>u32 bth0;
<------>u32 len;
<------>u32 pmtu = qp->pmtu;
<------>int ret = 0;
 
<------>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 (atomic_read(&priv->s_dma_busy)) {
<------><------><------>qp->s_flags |= RVT_S_WAIT_DMA;
<------><------><------>goto bail;
<------><------>}
<------><------>wqe = rvt_get_swqe_ptr(qp, qp->s_last);
<------><------>rvt_send_complete(qp, wqe, IB_WC_WR_FLUSH_ERR);
<------><------>goto done;
<------>}
 
<------>ohdr = &priv->s_hdr->u.oth;
<------>if (rdma_ah_get_ah_flags(&qp->remote_ah_attr) & IB_AH_GRH)
<------><------>ohdr = &priv->s_hdr->u.l.oth;
 
<------>/* header size in 32-bit words LRH+BTH = (8+12)/4. */
<------>hwords = 5;
<------>bth0 = 0;
 
<------>/* 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))
<------><------><------>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;
<------><------><------>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;
<------><------><------>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;
<------>qp->s_cur_sge = &qp->s_sge;
<------>qp->s_cur_size = len;
<------>qib_make_ruc_header(qp, ohdr, bth0 | (qp->s_state << 24),
<------><------><------>    qp->s_psn++ & QIB_PSN_MASK);
done:
<------>return 1;
bail:
<------>qp->s_flags &= ~RVT_S_BUSY;
<------>return ret;
}
 
/**
 * qib_uc_rcv - handle an incoming UC packet
 * @ibp: the port the packet came in on
 * @hdr: the header of the packet
 * @has_grh: true if the packet has a GRH
 * @data: the packet data
 * @tlen: the length of the packet
 * @qp: the QP for this packet.
 *
 * This is called from qib_qp_rcv() to process an incoming UC packet
 * for the given QP.
 * Called at interrupt level.
 */
void qib_uc_rcv(struct qib_ibport *ibp, struct ib_header *hdr,
<------><------>int has_grh, void *data, u32 tlen, struct rvt_qp *qp)
{
<------>struct ib_other_headers *ohdr;
<------>u32 opcode;
<------>u32 hdrsize;
<------>u32 psn;
<------>u32 pad;
<------>struct ib_wc wc;
<------>u32 pmtu = qp->pmtu;
<------>struct ib_reth *reth;
<------>int ret;
 
<------>/* Check for GRH */
<------>if (!has_grh) {
<------><------>ohdr = &hdr->u.oth;
<------><------>hdrsize = 8 + 12;       /* LRH + BTH */
<------>} else {
<------><------>ohdr = &hdr->u.l.oth;
<------><------>hdrsize = 8 + 40 + 12;  /* LRH + GRH + BTH */
<------>}
 
<------>opcode = be32_to_cpu(ohdr->bth[0]);
<------>if (qib_ruc_check_hdr(ibp, hdr, has_grh, qp, opcode))
<------><------>return;
 
<------>psn = be32_to_cpu(ohdr->bth[2]);
<------>opcode >>= 24;
 
<------>/* Compare the PSN verses the expected PSN. */
<------>if (unlikely(qib_cmp24(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. */
<------><------>if (unlikely(tlen != (hdrsize + pmtu + 4)))
<------><------><------>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;
<------><------>hdrsize += 4;
<------><------>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. */
<------><------>/* XXX 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;
<------><------>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);
<------><------>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;
<------><------>hdrsize += sizeof(*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:
<------><------>hdrsize += 4;
<------><------>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. */
<------><------>/* XXX 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 = 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:
<------><------>/* Get the number of bytes the message was padded by. */
<------><------>pad = (be32_to_cpu(ohdr->bth[0]) >> 20) & 3;
<------><------>/* Check for invalid length. */
<------><------>/* XXX 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;
<------><------>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);
<------>return;
 
}