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![Moni Shoua](/assets/img/avatar_default.png)
Soft RoCE (RXE) - The software RoCE driver ib_rxe implements the RDMA transport and registers to the RDMA core device as a kernel verbs provider. It also implements the packet IO layer. On the other hand ib_rxe registers to the Linux netdev stack as a udp encapsulating protocol, in that case RDMA, for sending and receiving packets over any Ethernet device. This yields a RDMA transport over the UDP/Ethernet network layer forming a RoCEv2 compatible device. The configuration procedure of the Soft RoCE drivers requires binding to any existing Ethernet network device. This is done with /sys interface. A userspace Soft RoCE library (librxe) provides user applications the ability to run with Soft RoCE devices. The use of rxe verbs ins user space requires the inclusion of librxe as a device specifics plug-in to libibverbs. librxe is packaged separately. Architecture: +-----------------------------------------------------------+ | Application | +-----------------------------------------------------------+ +-----------------------------------+ | libibverbs | User +-----------------------------------+ +----------------+ +----------------+ | librxe | | HW RoCE lib | +----------------+ +----------------+ +---------------------------------------------------------------+ +--------------+ +------------+ | Sockets | | RDMA ULP | +--------------+ +------------+ +--------------+ +---------------------+ | TCP/IP | | ib_core | +--------------+ +---------------------+ +------------+ +----------------+ Kernel | ib_rxe | | HW RoCE driver | +------------+ +----------------+ +------------------------------------+ | NIC driver | +------------------------------------+ ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ +-----------------------------------------------------------+ | Application | +-----------------------------------------------------------+ +-----------------------------------+ | libibverbs | User +-----------------------------------+ +----------------+ +----------------+ | librxe | | HW RoCE lib | +----------------+ +----------------+ ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ +--------------+ +------------+ | Sockets | | RDMA ULP | +--------------+ +------------+ +--------------+ +---------------------+ | TCP/IP | | ib_core | +--------------+ +---------------------+ +------------+ +----------------+ Kernel | ib_rxe | | HW RoCE driver | +------------+ +----------------+ +------------------------------------+ | NIC driver | +------------------------------------+ ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ Soft RoCE resources: [1[ https://github.com/SoftRoCE/librxe-dev librxe - source code in Github [2] https://github.com/SoftRoCE/rxe-dev/wiki/rxe-dev:-Home - Soft RoCE Wiki page [3] https://github.com/SoftRoCE/librxe-dev - Soft RoCE userspace library Signed-off-by: Kamal Heib <kamalh@mellanox.com> Signed-off-by: Amir Vadai <amirv@mellanox.com> Signed-off-by: Moni Shoua <monis@mellanox.com> Reviewed-by: Haggai Eran <haggaie@mellanox.com> Signed-off-by: Doug Ledford <dledford@redhat.com>
851 lines
19 KiB
C
851 lines
19 KiB
C
/*
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* Copyright (c) 2016 Mellanox Technologies Ltd. All rights reserved.
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* Copyright (c) 2015 System Fabric Works, Inc. All rights reserved.
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*
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* This software is available to you under a choice of one of two
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* licenses. You may choose to be licensed under the terms of the GNU
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* General Public License (GPL) Version 2, available from the file
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* COPYING in the main directory of this source tree, or the
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* OpenIB.org BSD license below:
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*
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* Redistribution and use in source and binary forms, with or
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* without modification, are permitted provided that the following
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* conditions are met:
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*
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* - Redistributions of source code must retain the above
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* copyright notice, this list of conditions and the following
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* disclaimer.
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*
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* - Redistributions in binary form must reproduce the above
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* copyright notice, this list of conditions and the following
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* disclaimer in the documentation and/or other materials
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* provided with the distribution.
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*
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* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
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* EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
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* MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
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* NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS
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* BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN
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* ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
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* CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
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* SOFTWARE.
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*/
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#include <linux/skbuff.h>
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#include <linux/delay.h>
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#include <linux/sched.h>
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#include "rxe.h"
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#include "rxe_loc.h"
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#include "rxe_queue.h"
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#include "rxe_task.h"
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char *rxe_qp_state_name[] = {
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[QP_STATE_RESET] = "RESET",
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[QP_STATE_INIT] = "INIT",
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[QP_STATE_READY] = "READY",
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[QP_STATE_DRAIN] = "DRAIN",
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[QP_STATE_DRAINED] = "DRAINED",
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[QP_STATE_ERROR] = "ERROR",
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};
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static int rxe_qp_chk_cap(struct rxe_dev *rxe, struct ib_qp_cap *cap,
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int has_srq)
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{
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if (cap->max_send_wr > rxe->attr.max_qp_wr) {
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pr_warn("invalid send wr = %d > %d\n",
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cap->max_send_wr, rxe->attr.max_qp_wr);
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goto err1;
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}
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if (cap->max_send_sge > rxe->attr.max_sge) {
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pr_warn("invalid send sge = %d > %d\n",
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cap->max_send_sge, rxe->attr.max_sge);
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goto err1;
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}
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if (!has_srq) {
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if (cap->max_recv_wr > rxe->attr.max_qp_wr) {
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pr_warn("invalid recv wr = %d > %d\n",
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cap->max_recv_wr, rxe->attr.max_qp_wr);
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goto err1;
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}
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if (cap->max_recv_sge > rxe->attr.max_sge) {
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pr_warn("invalid recv sge = %d > %d\n",
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cap->max_recv_sge, rxe->attr.max_sge);
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goto err1;
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}
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}
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if (cap->max_inline_data > rxe->max_inline_data) {
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pr_warn("invalid max inline data = %d > %d\n",
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cap->max_inline_data, rxe->max_inline_data);
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goto err1;
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}
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return 0;
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err1:
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return -EINVAL;
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}
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int rxe_qp_chk_init(struct rxe_dev *rxe, struct ib_qp_init_attr *init)
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{
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struct ib_qp_cap *cap = &init->cap;
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struct rxe_port *port;
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int port_num = init->port_num;
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if (!init->recv_cq || !init->send_cq) {
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pr_warn("missing cq\n");
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goto err1;
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}
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if (rxe_qp_chk_cap(rxe, cap, !!init->srq))
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goto err1;
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if (init->qp_type == IB_QPT_SMI || init->qp_type == IB_QPT_GSI) {
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if (port_num != 1) {
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pr_warn("invalid port = %d\n", port_num);
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goto err1;
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}
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port = &rxe->port;
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if (init->qp_type == IB_QPT_SMI && port->qp_smi_index) {
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pr_warn("SMI QP exists for port %d\n", port_num);
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goto err1;
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}
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if (init->qp_type == IB_QPT_GSI && port->qp_gsi_index) {
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pr_warn("GSI QP exists for port %d\n", port_num);
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goto err1;
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}
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}
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return 0;
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err1:
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return -EINVAL;
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}
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static int alloc_rd_atomic_resources(struct rxe_qp *qp, unsigned int n)
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{
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qp->resp.res_head = 0;
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qp->resp.res_tail = 0;
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qp->resp.resources = kcalloc(n, sizeof(struct resp_res), GFP_KERNEL);
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if (!qp->resp.resources)
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return -ENOMEM;
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return 0;
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}
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static void free_rd_atomic_resources(struct rxe_qp *qp)
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{
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if (qp->resp.resources) {
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int i;
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for (i = 0; i < qp->attr.max_rd_atomic; i++) {
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struct resp_res *res = &qp->resp.resources[i];
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free_rd_atomic_resource(qp, res);
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}
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kfree(qp->resp.resources);
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qp->resp.resources = NULL;
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}
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}
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void free_rd_atomic_resource(struct rxe_qp *qp, struct resp_res *res)
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{
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if (res->type == RXE_ATOMIC_MASK) {
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rxe_drop_ref(qp);
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kfree_skb(res->atomic.skb);
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} else if (res->type == RXE_READ_MASK) {
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if (res->read.mr)
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rxe_drop_ref(res->read.mr);
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}
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res->type = 0;
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}
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static void cleanup_rd_atomic_resources(struct rxe_qp *qp)
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{
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int i;
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struct resp_res *res;
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if (qp->resp.resources) {
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for (i = 0; i < qp->attr.max_rd_atomic; i++) {
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res = &qp->resp.resources[i];
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free_rd_atomic_resource(qp, res);
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}
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}
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}
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static void rxe_qp_init_misc(struct rxe_dev *rxe, struct rxe_qp *qp,
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struct ib_qp_init_attr *init)
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{
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struct rxe_port *port;
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u32 qpn;
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qp->sq_sig_type = init->sq_sig_type;
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qp->attr.path_mtu = 1;
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qp->mtu = ib_mtu_enum_to_int(qp->attr.path_mtu);
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qpn = qp->pelem.index;
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port = &rxe->port;
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switch (init->qp_type) {
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case IB_QPT_SMI:
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qp->ibqp.qp_num = 0;
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port->qp_smi_index = qpn;
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qp->attr.port_num = init->port_num;
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break;
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case IB_QPT_GSI:
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qp->ibqp.qp_num = 1;
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port->qp_gsi_index = qpn;
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qp->attr.port_num = init->port_num;
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break;
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default:
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qp->ibqp.qp_num = qpn;
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break;
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}
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INIT_LIST_HEAD(&qp->grp_list);
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skb_queue_head_init(&qp->send_pkts);
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spin_lock_init(&qp->grp_lock);
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spin_lock_init(&qp->state_lock);
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atomic_set(&qp->ssn, 0);
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atomic_set(&qp->skb_out, 0);
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}
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static int rxe_qp_init_req(struct rxe_dev *rxe, struct rxe_qp *qp,
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struct ib_qp_init_attr *init,
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struct ib_ucontext *context, struct ib_udata *udata)
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{
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int err;
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int wqe_size;
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err = sock_create_kern(&init_net, AF_INET, SOCK_DGRAM, 0, &qp->sk);
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if (err < 0)
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return err;
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qp->sk->sk->sk_user_data = qp;
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qp->sq.max_wr = init->cap.max_send_wr;
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qp->sq.max_sge = init->cap.max_send_sge;
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qp->sq.max_inline = init->cap.max_inline_data;
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wqe_size = max_t(int, sizeof(struct rxe_send_wqe) +
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qp->sq.max_sge * sizeof(struct ib_sge),
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sizeof(struct rxe_send_wqe) +
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qp->sq.max_inline);
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qp->sq.queue = rxe_queue_init(rxe,
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&qp->sq.max_wr,
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wqe_size);
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if (!qp->sq.queue)
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return -ENOMEM;
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err = do_mmap_info(rxe, udata, true,
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context, qp->sq.queue->buf,
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qp->sq.queue->buf_size, &qp->sq.queue->ip);
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if (err) {
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kvfree(qp->sq.queue->buf);
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kfree(qp->sq.queue);
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return err;
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}
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qp->req.wqe_index = producer_index(qp->sq.queue);
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qp->req.state = QP_STATE_RESET;
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qp->req.opcode = -1;
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qp->comp.opcode = -1;
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spin_lock_init(&qp->sq.sq_lock);
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skb_queue_head_init(&qp->req_pkts);
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rxe_init_task(rxe, &qp->req.task, qp,
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rxe_requester, "req");
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rxe_init_task(rxe, &qp->comp.task, qp,
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rxe_completer, "comp");
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init_timer(&qp->rnr_nak_timer);
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qp->rnr_nak_timer.function = rnr_nak_timer;
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qp->rnr_nak_timer.data = (unsigned long)qp;
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init_timer(&qp->retrans_timer);
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qp->retrans_timer.function = retransmit_timer;
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qp->retrans_timer.data = (unsigned long)qp;
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qp->qp_timeout_jiffies = 0; /* Can't be set for UD/UC in modify_qp */
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return 0;
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}
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static int rxe_qp_init_resp(struct rxe_dev *rxe, struct rxe_qp *qp,
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struct ib_qp_init_attr *init,
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struct ib_ucontext *context, struct ib_udata *udata)
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{
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int err;
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int wqe_size;
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if (!qp->srq) {
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qp->rq.max_wr = init->cap.max_recv_wr;
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qp->rq.max_sge = init->cap.max_recv_sge;
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wqe_size = rcv_wqe_size(qp->rq.max_sge);
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pr_debug("max_wr = %d, max_sge = %d, wqe_size = %d\n",
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qp->rq.max_wr, qp->rq.max_sge, wqe_size);
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qp->rq.queue = rxe_queue_init(rxe,
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&qp->rq.max_wr,
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wqe_size);
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if (!qp->rq.queue)
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return -ENOMEM;
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err = do_mmap_info(rxe, udata, false, context,
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qp->rq.queue->buf,
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qp->rq.queue->buf_size,
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&qp->rq.queue->ip);
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if (err) {
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kvfree(qp->rq.queue->buf);
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kfree(qp->rq.queue);
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return err;
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}
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}
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spin_lock_init(&qp->rq.producer_lock);
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spin_lock_init(&qp->rq.consumer_lock);
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skb_queue_head_init(&qp->resp_pkts);
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rxe_init_task(rxe, &qp->resp.task, qp,
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rxe_responder, "resp");
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qp->resp.opcode = OPCODE_NONE;
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qp->resp.msn = 0;
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qp->resp.state = QP_STATE_RESET;
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return 0;
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}
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/* called by the create qp verb */
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int rxe_qp_from_init(struct rxe_dev *rxe, struct rxe_qp *qp, struct rxe_pd *pd,
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struct ib_qp_init_attr *init, struct ib_udata *udata,
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struct ib_pd *ibpd)
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{
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int err;
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struct rxe_cq *rcq = to_rcq(init->recv_cq);
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struct rxe_cq *scq = to_rcq(init->send_cq);
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struct rxe_srq *srq = init->srq ? to_rsrq(init->srq) : NULL;
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struct ib_ucontext *context = udata ? ibpd->uobject->context : NULL;
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rxe_add_ref(pd);
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rxe_add_ref(rcq);
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rxe_add_ref(scq);
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if (srq)
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rxe_add_ref(srq);
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qp->pd = pd;
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qp->rcq = rcq;
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qp->scq = scq;
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qp->srq = srq;
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rxe_qp_init_misc(rxe, qp, init);
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err = rxe_qp_init_req(rxe, qp, init, context, udata);
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if (err)
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goto err1;
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err = rxe_qp_init_resp(rxe, qp, init, context, udata);
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if (err)
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goto err2;
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qp->attr.qp_state = IB_QPS_RESET;
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qp->valid = 1;
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return 0;
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err2:
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rxe_queue_cleanup(qp->sq.queue);
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err1:
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if (srq)
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rxe_drop_ref(srq);
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rxe_drop_ref(scq);
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rxe_drop_ref(rcq);
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rxe_drop_ref(pd);
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return err;
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}
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/* called by the query qp verb */
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int rxe_qp_to_init(struct rxe_qp *qp, struct ib_qp_init_attr *init)
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{
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init->event_handler = qp->ibqp.event_handler;
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init->qp_context = qp->ibqp.qp_context;
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init->send_cq = qp->ibqp.send_cq;
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init->recv_cq = qp->ibqp.recv_cq;
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init->srq = qp->ibqp.srq;
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init->cap.max_send_wr = qp->sq.max_wr;
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init->cap.max_send_sge = qp->sq.max_sge;
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init->cap.max_inline_data = qp->sq.max_inline;
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if (!qp->srq) {
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init->cap.max_recv_wr = qp->rq.max_wr;
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init->cap.max_recv_sge = qp->rq.max_sge;
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}
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init->sq_sig_type = qp->sq_sig_type;
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init->qp_type = qp->ibqp.qp_type;
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init->port_num = 1;
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return 0;
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}
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/* called by the modify qp verb, this routine checks all the parameters before
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* making any changes
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*/
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int rxe_qp_chk_attr(struct rxe_dev *rxe, struct rxe_qp *qp,
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struct ib_qp_attr *attr, int mask)
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{
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enum ib_qp_state cur_state = (mask & IB_QP_CUR_STATE) ?
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attr->cur_qp_state : qp->attr.qp_state;
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enum ib_qp_state new_state = (mask & IB_QP_STATE) ?
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attr->qp_state : cur_state;
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if (!ib_modify_qp_is_ok(cur_state, new_state, qp_type(qp), mask,
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IB_LINK_LAYER_ETHERNET)) {
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pr_warn("invalid mask or state for qp\n");
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goto err1;
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}
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if (mask & IB_QP_STATE) {
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if (cur_state == IB_QPS_SQD) {
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if (qp->req.state == QP_STATE_DRAIN &&
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new_state != IB_QPS_ERR)
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goto err1;
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}
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}
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if (mask & IB_QP_PORT) {
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if (attr->port_num != 1) {
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pr_warn("invalid port %d\n", attr->port_num);
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goto err1;
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}
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}
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if (mask & IB_QP_CAP && rxe_qp_chk_cap(rxe, &attr->cap, !!qp->srq))
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goto err1;
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if (mask & IB_QP_AV && rxe_av_chk_attr(rxe, &attr->ah_attr))
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goto err1;
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if (mask & IB_QP_ALT_PATH) {
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if (rxe_av_chk_attr(rxe, &attr->alt_ah_attr))
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goto err1;
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|
if (attr->alt_port_num != 1) {
|
|
pr_warn("invalid alt port %d\n", attr->alt_port_num);
|
|
goto err1;
|
|
}
|
|
if (attr->alt_timeout > 31) {
|
|
pr_warn("invalid QP alt timeout %d > 31\n",
|
|
attr->alt_timeout);
|
|
goto err1;
|
|
}
|
|
}
|
|
|
|
if (mask & IB_QP_PATH_MTU) {
|
|
struct rxe_port *port = &rxe->port;
|
|
|
|
enum ib_mtu max_mtu = port->attr.max_mtu;
|
|
enum ib_mtu mtu = attr->path_mtu;
|
|
|
|
if (mtu > max_mtu) {
|
|
pr_debug("invalid mtu (%d) > (%d)\n",
|
|
ib_mtu_enum_to_int(mtu),
|
|
ib_mtu_enum_to_int(max_mtu));
|
|
goto err1;
|
|
}
|
|
}
|
|
|
|
if (mask & IB_QP_MAX_QP_RD_ATOMIC) {
|
|
if (attr->max_rd_atomic > rxe->attr.max_qp_rd_atom) {
|
|
pr_warn("invalid max_rd_atomic %d > %d\n",
|
|
attr->max_rd_atomic,
|
|
rxe->attr.max_qp_rd_atom);
|
|
goto err1;
|
|
}
|
|
}
|
|
|
|
if (mask & IB_QP_TIMEOUT) {
|
|
if (attr->timeout > 31) {
|
|
pr_warn("invalid QP timeout %d > 31\n",
|
|
attr->timeout);
|
|
goto err1;
|
|
}
|
|
}
|
|
|
|
return 0;
|
|
|
|
err1:
|
|
return -EINVAL;
|
|
}
|
|
|
|
/* move the qp to the reset state */
|
|
static void rxe_qp_reset(struct rxe_qp *qp)
|
|
{
|
|
/* stop tasks from running */
|
|
rxe_disable_task(&qp->resp.task);
|
|
|
|
/* stop request/comp */
|
|
if (qp->sq.queue) {
|
|
if (qp_type(qp) == IB_QPT_RC)
|
|
rxe_disable_task(&qp->comp.task);
|
|
rxe_disable_task(&qp->req.task);
|
|
}
|
|
|
|
/* move qp to the reset state */
|
|
qp->req.state = QP_STATE_RESET;
|
|
qp->resp.state = QP_STATE_RESET;
|
|
|
|
/* let state machines reset themselves drain work and packet queues
|
|
* etc.
|
|
*/
|
|
__rxe_do_task(&qp->resp.task);
|
|
|
|
if (qp->sq.queue) {
|
|
__rxe_do_task(&qp->comp.task);
|
|
__rxe_do_task(&qp->req.task);
|
|
}
|
|
|
|
/* cleanup attributes */
|
|
atomic_set(&qp->ssn, 0);
|
|
qp->req.opcode = -1;
|
|
qp->req.need_retry = 0;
|
|
qp->req.noack_pkts = 0;
|
|
qp->resp.msn = 0;
|
|
qp->resp.opcode = -1;
|
|
qp->resp.drop_msg = 0;
|
|
qp->resp.goto_error = 0;
|
|
qp->resp.sent_psn_nak = 0;
|
|
|
|
if (qp->resp.mr) {
|
|
rxe_drop_ref(qp->resp.mr);
|
|
qp->resp.mr = NULL;
|
|
}
|
|
|
|
cleanup_rd_atomic_resources(qp);
|
|
|
|
/* reenable tasks */
|
|
rxe_enable_task(&qp->resp.task);
|
|
|
|
if (qp->sq.queue) {
|
|
if (qp_type(qp) == IB_QPT_RC)
|
|
rxe_enable_task(&qp->comp.task);
|
|
|
|
rxe_enable_task(&qp->req.task);
|
|
}
|
|
}
|
|
|
|
/* drain the send queue */
|
|
static void rxe_qp_drain(struct rxe_qp *qp)
|
|
{
|
|
if (qp->sq.queue) {
|
|
if (qp->req.state != QP_STATE_DRAINED) {
|
|
qp->req.state = QP_STATE_DRAIN;
|
|
if (qp_type(qp) == IB_QPT_RC)
|
|
rxe_run_task(&qp->comp.task, 1);
|
|
else
|
|
__rxe_do_task(&qp->comp.task);
|
|
rxe_run_task(&qp->req.task, 1);
|
|
}
|
|
}
|
|
}
|
|
|
|
/* move the qp to the error state */
|
|
void rxe_qp_error(struct rxe_qp *qp)
|
|
{
|
|
qp->req.state = QP_STATE_ERROR;
|
|
qp->resp.state = QP_STATE_ERROR;
|
|
|
|
/* drain work and packet queues */
|
|
rxe_run_task(&qp->resp.task, 1);
|
|
|
|
if (qp_type(qp) == IB_QPT_RC)
|
|
rxe_run_task(&qp->comp.task, 1);
|
|
else
|
|
__rxe_do_task(&qp->comp.task);
|
|
rxe_run_task(&qp->req.task, 1);
|
|
}
|
|
|
|
/* called by the modify qp verb */
|
|
int rxe_qp_from_attr(struct rxe_qp *qp, struct ib_qp_attr *attr, int mask,
|
|
struct ib_udata *udata)
|
|
{
|
|
int err;
|
|
struct rxe_dev *rxe = to_rdev(qp->ibqp.device);
|
|
union ib_gid sgid;
|
|
struct ib_gid_attr sgid_attr;
|
|
|
|
if (mask & IB_QP_MAX_QP_RD_ATOMIC) {
|
|
int max_rd_atomic = __roundup_pow_of_two(attr->max_rd_atomic);
|
|
|
|
free_rd_atomic_resources(qp);
|
|
|
|
err = alloc_rd_atomic_resources(qp, max_rd_atomic);
|
|
if (err)
|
|
return err;
|
|
|
|
qp->attr.max_rd_atomic = max_rd_atomic;
|
|
atomic_set(&qp->req.rd_atomic, max_rd_atomic);
|
|
}
|
|
|
|
if (mask & IB_QP_CUR_STATE)
|
|
qp->attr.cur_qp_state = attr->qp_state;
|
|
|
|
if (mask & IB_QP_EN_SQD_ASYNC_NOTIFY)
|
|
qp->attr.en_sqd_async_notify = attr->en_sqd_async_notify;
|
|
|
|
if (mask & IB_QP_ACCESS_FLAGS)
|
|
qp->attr.qp_access_flags = attr->qp_access_flags;
|
|
|
|
if (mask & IB_QP_PKEY_INDEX)
|
|
qp->attr.pkey_index = attr->pkey_index;
|
|
|
|
if (mask & IB_QP_PORT)
|
|
qp->attr.port_num = attr->port_num;
|
|
|
|
if (mask & IB_QP_QKEY)
|
|
qp->attr.qkey = attr->qkey;
|
|
|
|
if (mask & IB_QP_AV) {
|
|
ib_get_cached_gid(&rxe->ib_dev, 1,
|
|
attr->ah_attr.grh.sgid_index, &sgid,
|
|
&sgid_attr);
|
|
rxe_av_from_attr(rxe, attr->port_num, &qp->pri_av,
|
|
&attr->ah_attr);
|
|
rxe_av_fill_ip_info(rxe, &qp->pri_av, &attr->ah_attr,
|
|
&sgid_attr, &sgid);
|
|
if (sgid_attr.ndev)
|
|
dev_put(sgid_attr.ndev);
|
|
}
|
|
|
|
if (mask & IB_QP_ALT_PATH) {
|
|
ib_get_cached_gid(&rxe->ib_dev, 1,
|
|
attr->alt_ah_attr.grh.sgid_index, &sgid,
|
|
&sgid_attr);
|
|
|
|
rxe_av_from_attr(rxe, attr->alt_port_num, &qp->alt_av,
|
|
&attr->alt_ah_attr);
|
|
rxe_av_fill_ip_info(rxe, &qp->alt_av, &attr->alt_ah_attr,
|
|
&sgid_attr, &sgid);
|
|
if (sgid_attr.ndev)
|
|
dev_put(sgid_attr.ndev);
|
|
|
|
qp->attr.alt_port_num = attr->alt_port_num;
|
|
qp->attr.alt_pkey_index = attr->alt_pkey_index;
|
|
qp->attr.alt_timeout = attr->alt_timeout;
|
|
}
|
|
|
|
if (mask & IB_QP_PATH_MTU) {
|
|
qp->attr.path_mtu = attr->path_mtu;
|
|
qp->mtu = ib_mtu_enum_to_int(attr->path_mtu);
|
|
}
|
|
|
|
if (mask & IB_QP_TIMEOUT) {
|
|
qp->attr.timeout = attr->timeout;
|
|
if (attr->timeout == 0) {
|
|
qp->qp_timeout_jiffies = 0;
|
|
} else {
|
|
/* According to the spec, timeout = 4.096 * 2 ^ attr->timeout [us] */
|
|
int j = nsecs_to_jiffies(4096ULL << attr->timeout);
|
|
|
|
qp->qp_timeout_jiffies = j ? j : 1;
|
|
}
|
|
}
|
|
|
|
if (mask & IB_QP_RETRY_CNT) {
|
|
qp->attr.retry_cnt = attr->retry_cnt;
|
|
qp->comp.retry_cnt = attr->retry_cnt;
|
|
pr_debug("set retry count = %d\n", attr->retry_cnt);
|
|
}
|
|
|
|
if (mask & IB_QP_RNR_RETRY) {
|
|
qp->attr.rnr_retry = attr->rnr_retry;
|
|
qp->comp.rnr_retry = attr->rnr_retry;
|
|
pr_debug("set rnr retry count = %d\n", attr->rnr_retry);
|
|
}
|
|
|
|
if (mask & IB_QP_RQ_PSN) {
|
|
qp->attr.rq_psn = (attr->rq_psn & BTH_PSN_MASK);
|
|
qp->resp.psn = qp->attr.rq_psn;
|
|
pr_debug("set resp psn = 0x%x\n", qp->resp.psn);
|
|
}
|
|
|
|
if (mask & IB_QP_MIN_RNR_TIMER) {
|
|
qp->attr.min_rnr_timer = attr->min_rnr_timer;
|
|
pr_debug("set min rnr timer = 0x%x\n",
|
|
attr->min_rnr_timer);
|
|
}
|
|
|
|
if (mask & IB_QP_SQ_PSN) {
|
|
qp->attr.sq_psn = (attr->sq_psn & BTH_PSN_MASK);
|
|
qp->req.psn = qp->attr.sq_psn;
|
|
qp->comp.psn = qp->attr.sq_psn;
|
|
pr_debug("set req psn = 0x%x\n", qp->req.psn);
|
|
}
|
|
|
|
if (mask & IB_QP_MAX_DEST_RD_ATOMIC) {
|
|
qp->attr.max_dest_rd_atomic =
|
|
__roundup_pow_of_two(attr->max_dest_rd_atomic);
|
|
}
|
|
|
|
if (mask & IB_QP_PATH_MIG_STATE)
|
|
qp->attr.path_mig_state = attr->path_mig_state;
|
|
|
|
if (mask & IB_QP_DEST_QPN)
|
|
qp->attr.dest_qp_num = attr->dest_qp_num;
|
|
|
|
if (mask & IB_QP_STATE) {
|
|
qp->attr.qp_state = attr->qp_state;
|
|
|
|
switch (attr->qp_state) {
|
|
case IB_QPS_RESET:
|
|
pr_debug("qp state -> RESET\n");
|
|
rxe_qp_reset(qp);
|
|
break;
|
|
|
|
case IB_QPS_INIT:
|
|
pr_debug("qp state -> INIT\n");
|
|
qp->req.state = QP_STATE_INIT;
|
|
qp->resp.state = QP_STATE_INIT;
|
|
break;
|
|
|
|
case IB_QPS_RTR:
|
|
pr_debug("qp state -> RTR\n");
|
|
qp->resp.state = QP_STATE_READY;
|
|
break;
|
|
|
|
case IB_QPS_RTS:
|
|
pr_debug("qp state -> RTS\n");
|
|
qp->req.state = QP_STATE_READY;
|
|
break;
|
|
|
|
case IB_QPS_SQD:
|
|
pr_debug("qp state -> SQD\n");
|
|
rxe_qp_drain(qp);
|
|
break;
|
|
|
|
case IB_QPS_SQE:
|
|
pr_warn("qp state -> SQE !!?\n");
|
|
/* Not possible from modify_qp. */
|
|
break;
|
|
|
|
case IB_QPS_ERR:
|
|
pr_debug("qp state -> ERR\n");
|
|
rxe_qp_error(qp);
|
|
break;
|
|
}
|
|
}
|
|
|
|
return 0;
|
|
}
|
|
|
|
/* called by the query qp verb */
|
|
int rxe_qp_to_attr(struct rxe_qp *qp, struct ib_qp_attr *attr, int mask)
|
|
{
|
|
struct rxe_dev *rxe = to_rdev(qp->ibqp.device);
|
|
|
|
*attr = qp->attr;
|
|
|
|
attr->rq_psn = qp->resp.psn;
|
|
attr->sq_psn = qp->req.psn;
|
|
|
|
attr->cap.max_send_wr = qp->sq.max_wr;
|
|
attr->cap.max_send_sge = qp->sq.max_sge;
|
|
attr->cap.max_inline_data = qp->sq.max_inline;
|
|
|
|
if (!qp->srq) {
|
|
attr->cap.max_recv_wr = qp->rq.max_wr;
|
|
attr->cap.max_recv_sge = qp->rq.max_sge;
|
|
}
|
|
|
|
rxe_av_to_attr(rxe, &qp->pri_av, &attr->ah_attr);
|
|
rxe_av_to_attr(rxe, &qp->alt_av, &attr->alt_ah_attr);
|
|
|
|
if (qp->req.state == QP_STATE_DRAIN) {
|
|
attr->sq_draining = 1;
|
|
/* applications that get this state
|
|
* typically spin on it. yield the
|
|
* processor
|
|
*/
|
|
cond_resched();
|
|
} else {
|
|
attr->sq_draining = 0;
|
|
}
|
|
|
|
pr_debug("attr->sq_draining = %d\n", attr->sq_draining);
|
|
|
|
return 0;
|
|
}
|
|
|
|
/* called by the destroy qp verb */
|
|
void rxe_qp_destroy(struct rxe_qp *qp)
|
|
{
|
|
qp->valid = 0;
|
|
qp->qp_timeout_jiffies = 0;
|
|
rxe_cleanup_task(&qp->resp.task);
|
|
|
|
del_timer_sync(&qp->retrans_timer);
|
|
del_timer_sync(&qp->rnr_nak_timer);
|
|
|
|
rxe_cleanup_task(&qp->req.task);
|
|
if (qp_type(qp) == IB_QPT_RC)
|
|
rxe_cleanup_task(&qp->comp.task);
|
|
|
|
/* flush out any receive wr's or pending requests */
|
|
__rxe_do_task(&qp->req.task);
|
|
if (qp->sq.queue) {
|
|
__rxe_do_task(&qp->comp.task);
|
|
__rxe_do_task(&qp->req.task);
|
|
}
|
|
}
|
|
|
|
/* called when the last reference to the qp is dropped */
|
|
void rxe_qp_cleanup(void *arg)
|
|
{
|
|
struct rxe_qp *qp = arg;
|
|
|
|
rxe_drop_all_mcast_groups(qp);
|
|
|
|
if (qp->sq.queue)
|
|
rxe_queue_cleanup(qp->sq.queue);
|
|
|
|
if (qp->srq)
|
|
rxe_drop_ref(qp->srq);
|
|
|
|
if (qp->rq.queue)
|
|
rxe_queue_cleanup(qp->rq.queue);
|
|
|
|
if (qp->scq)
|
|
rxe_drop_ref(qp->scq);
|
|
if (qp->rcq)
|
|
rxe_drop_ref(qp->rcq);
|
|
if (qp->pd)
|
|
rxe_drop_ref(qp->pd);
|
|
|
|
if (qp->resp.mr) {
|
|
rxe_drop_ref(qp->resp.mr);
|
|
qp->resp.mr = NULL;
|
|
}
|
|
|
|
free_rd_atomic_resources(qp);
|
|
|
|
kernel_sock_shutdown(qp->sk, SHUT_RDWR);
|
|
}
|