From patchwork Thu Jun 2 16:57:18 2016 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Moni Shoua X-Patchwork-Id: 9150945 Return-Path: Received: from mail.wl.linuxfoundation.org (pdx-wl-mail.web.codeaurora.org [172.30.200.125]) by pdx-korg-patchwork.web.codeaurora.org (Postfix) with ESMTP id B00856074E for ; Thu, 2 Jun 2016 16:59:38 +0000 (UTC) Received: from mail.wl.linuxfoundation.org (localhost [127.0.0.1]) by mail.wl.linuxfoundation.org (Postfix) with ESMTP id 9CE482780C for ; Thu, 2 Jun 2016 16:59:38 +0000 (UTC) Received: by mail.wl.linuxfoundation.org (Postfix, from userid 486) id 919A6282ED; Thu, 2 Jun 2016 16:59:38 +0000 (UTC) X-Spam-Checker-Version: SpamAssassin 3.3.1 (2010-03-16) on pdx-wl-mail.web.codeaurora.org X-Spam-Level: X-Spam-Status: No, score=-6.9 required=2.0 tests=BAYES_00, RCVD_IN_DNSWL_HI, UNPARSEABLE_RELAY autolearn=ham version=3.3.1 Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by mail.wl.linuxfoundation.org (Postfix) with ESMTP id 3460228310 for ; Thu, 2 Jun 2016 16:59:36 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S932175AbcFBQ7Y (ORCPT ); Thu, 2 Jun 2016 12:59:24 -0400 Received: from [193.47.165.129] ([193.47.165.129]:42825 "EHLO mellanox.co.il" rhost-flags-FAIL-FAIL-OK-FAIL) by vger.kernel.org with ESMTP id S1030180AbcFBQ7U (ORCPT ); Thu, 2 Jun 2016 12:59:20 -0400 Received: from Internal Mail-Server by MTLPINE1 (envelope-from monis@mellanox.com) with ESMTPS (AES256-SHA encrypted); 2 Jun 2016 19:57:47 +0300 Received: from r-vnc06.mtr.labs.mlnx (r-vnc06.mtr.labs.mlnx [10.208.0.117]) by labmailer.mlnx (8.13.8/8.13.8) with ESMTP id u52Gvk8V028172; Thu, 2 Jun 2016 19:57:47 +0300 From: Moni Shoua To: dledford@redhat.com Cc: linux-rdma@vger.kernel.org, matanb@mellanox.com, leon@mellanox.com, majd@mellanox.com, liranl@mellanox.com, Moni Shoua , Kamal Heib , Amir Vadai Subject: [PATCH rdma-next 10/29] IB/rxe: Interface to ib_core Date: Thu, 2 Jun 2016 19:57:18 +0300 Message-Id: <1464886657-14258-11-git-send-email-monis@mellanox.com> X-Mailer: git-send-email 1.7.6.4 In-Reply-To: <1464886657-14258-1-git-send-email-monis@mellanox.com> References: <1464886657-14258-1-git-send-email-monis@mellanox.com> Sender: linux-rdma-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-rdma@vger.kernel.org X-Virus-Scanned: ClamAV using ClamSMTP Implementation of verbs interface as declared in InfiniBand core device (struct ib_device). Signed-off-by: Kamal Heib Signed-off-by: Amir Vadai Signed-off-by: Moni Shoua Reviewed-by: Haggai Eran --- drivers/infiniband/hw/rxe/rxe_verbs.c | 1352 +++++++++++++++++++++++++++++++++ drivers/infiniband/hw/rxe/rxe_verbs.h | 486 ++++++++++++ 2 files changed, 1838 insertions(+) create mode 100644 drivers/infiniband/hw/rxe/rxe_verbs.c create mode 100644 drivers/infiniband/hw/rxe/rxe_verbs.h diff --git a/drivers/infiniband/hw/rxe/rxe_verbs.c b/drivers/infiniband/hw/rxe/rxe_verbs.c new file mode 100644 index 0000000..71302a3 --- /dev/null +++ b/drivers/infiniband/hw/rxe/rxe_verbs.c @@ -0,0 +1,1352 @@ +/* + * Copyright (c) 2016 Mellanox Technologies Ltd. All rights reserved. + * Copyright (c) 2015 System Fabric Works, 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 "rxe.h" +#include "rxe_loc.h" +#include "rxe_queue.h" + +static int rxe_query_device(struct ib_device *dev, + struct ib_device_attr *attr, + struct ib_udata *uhw) +{ + struct rxe_dev *rxe = to_rdev(dev); + + if (uhw->inlen || uhw->outlen) + return -EINVAL; + + *attr = rxe->attr; + return 0; +} + +static void rxe_eth_speed_to_ib_speed(int speed, u8 *active_speed, + u8 *active_width) +{ + if (speed <= 1000) { + *active_width = IB_WIDTH_1X; + *active_speed = IB_SPEED_SDR; + } else if (speed <= 10000) { + *active_width = IB_WIDTH_1X; + *active_speed = IB_SPEED_FDR10; + } else if (speed <= 20000) { + *active_width = IB_WIDTH_4X; + *active_speed = IB_SPEED_DDR; + } else if (speed <= 30000) { + *active_width = IB_WIDTH_4X; + *active_speed = IB_SPEED_QDR; + } else if (speed <= 40000) { + *active_width = IB_WIDTH_4X; + *active_speed = IB_SPEED_FDR10; + } else { + *active_width = IB_WIDTH_4X; + *active_speed = IB_SPEED_EDR; + } +} + +static int rxe_query_port(struct ib_device *dev, + u8 port_num, struct ib_port_attr *attr) +{ + struct rxe_dev *rxe = to_rdev(dev); + struct rxe_port *port; + u32 speed; + + if (unlikely(port_num < 1 || port_num > rxe->num_ports)) { + pr_warn("invalid port_number %d\n", port_num); + goto err1; + } + + port = &rxe->port[port_num - 1]; + + *attr = port->attr; + + mutex_lock(&rxe->usdev_lock); + if (rxe->ndev->ethtool_ops->get_link_ksettings) { + struct ethtool_link_ksettings ks; + + rxe->ndev->ethtool_ops->get_link_ksettings(rxe->ndev, &ks); + speed = ks.base.speed; + } else if (rxe->ndev->ethtool_ops->get_settings) { + struct ethtool_cmd cmd; + + rxe->ndev->ethtool_ops->get_settings(rxe->ndev, &cmd); + speed = cmd.speed; + } else { + pr_warn("%s speed is unknown, defaulting to 1000\n", rxe->ndev->name); + speed = 1000; + } + rxe_eth_speed_to_ib_speed(speed, &attr->active_speed, &attr->active_width); + mutex_unlock(&rxe->usdev_lock); + + return 0; + +err1: + return -EINVAL; +} + +static int rxe_query_gid(struct ib_device *device, + u8 port_num, int index, union ib_gid *gid) +{ + int ret; + + if (index > RXE_PORT_GID_TBL_LEN) + return -EINVAL; + + ret = ib_get_cached_gid(device, port_num, index, gid, NULL); + if (ret == -EAGAIN) { + memcpy(gid, &zgid, sizeof(*gid)); + return 0; + } + + return ret; +} + +static int rxe_add_gid(struct ib_device *device, u8 port_num, unsigned int + index, const union ib_gid *gid, + const struct ib_gid_attr *attr, void **context) +{ + if (index >= RXE_PORT_GID_TBL_LEN) + return -EINVAL; + return 0; +} + +static int rxe_del_gid(struct ib_device *device, u8 port_num, unsigned int + index, void **context) +{ + if (index >= RXE_PORT_GID_TBL_LEN) + return -EINVAL; + return 0; +} + +static struct net_device *rxe_get_netdev(struct ib_device *device, + u8 port_num) +{ + struct rxe_dev *rxe = to_rdev(device); + + if (rxe->ndev) { + dev_hold(rxe->ndev); + return rxe->ndev; + } + + return NULL; +} + +static int rxe_query_pkey(struct ib_device *device, + u8 port_num, u16 index, u16 *pkey) +{ + struct rxe_dev *rxe = to_rdev(device); + struct rxe_port *port; + + if (unlikely(port_num < 1 || port_num > rxe->num_ports)) { + dev_warn(device->dma_device, "invalid port_num = %d\n", + port_num); + goto err1; + } + + port = &rxe->port[port_num - 1]; + + if (unlikely(index >= port->attr.pkey_tbl_len)) { + dev_warn(device->dma_device, "invalid index = %d\n", + index); + goto err1; + } + + *pkey = port->pkey_tbl[index]; + return 0; + +err1: + return -EINVAL; +} + +static int rxe_modify_device(struct ib_device *dev, + int mask, struct ib_device_modify *attr) +{ + struct rxe_dev *rxe = to_rdev(dev); + + if (mask & IB_DEVICE_MODIFY_SYS_IMAGE_GUID) + rxe->attr.sys_image_guid = cpu_to_be64(attr->sys_image_guid); + + if (mask & IB_DEVICE_MODIFY_NODE_DESC) { + memcpy(rxe->ib_dev.node_desc, + attr->node_desc, sizeof(rxe->ib_dev.node_desc)); + } + + return 0; +} + +static int rxe_modify_port(struct ib_device *dev, + u8 port_num, int mask, struct ib_port_modify *attr) +{ + struct rxe_dev *rxe = to_rdev(dev); + struct rxe_port *port; + + if (unlikely(port_num < 1 || port_num > rxe->num_ports)) { + pr_warn("invalid port_num = %d\n", port_num); + goto err1; + } + + port = &rxe->port[port_num - 1]; + + port->attr.port_cap_flags |= attr->set_port_cap_mask; + port->attr.port_cap_flags &= ~attr->clr_port_cap_mask; + + if (mask & IB_PORT_RESET_QKEY_CNTR) + port->attr.qkey_viol_cntr = 0; + + return 0; + +err1: + return -EINVAL; +} + +static enum rdma_link_layer rxe_get_link_layer(struct ib_device *dev, + u8 port_num) +{ + struct rxe_dev *rxe = to_rdev(dev); + + return rxe->ifc_ops->link_layer(rxe, port_num); +} + +static struct ib_ucontext *rxe_alloc_ucontext(struct ib_device *dev, + struct ib_udata *udata) +{ + struct rxe_dev *rxe = to_rdev(dev); + struct rxe_ucontext *uc; + + uc = rxe_alloc(&rxe->uc_pool); + return uc ? &uc->ibuc : ERR_PTR(-ENOMEM); +} + +static int rxe_dealloc_ucontext(struct ib_ucontext *ibuc) +{ + struct rxe_ucontext *uc = to_ruc(ibuc); + + rxe_drop_ref(uc); + return 0; +} + +static int rxe_port_immutable(struct ib_device *dev, u8 port_num, + struct ib_port_immutable *immutable) +{ + int err; + struct ib_port_attr attr; + + err = rxe_query_port(dev, port_num, &attr); + if (err) + return err; + + immutable->pkey_tbl_len = attr.pkey_tbl_len; + immutable->gid_tbl_len = attr.gid_tbl_len; + immutable->core_cap_flags = RDMA_CORE_PORT_IBA_ROCE_UDP_ENCAP; + immutable->max_mad_size = IB_MGMT_MAD_SIZE; + + return 0; +} + +static struct ib_pd *rxe_alloc_pd(struct ib_device *dev, + struct ib_ucontext *context, + struct ib_udata *udata) +{ + struct rxe_dev *rxe = to_rdev(dev); + struct rxe_pd *pd; + + pd = rxe_alloc(&rxe->pd_pool); + return pd ? &pd->ibpd : ERR_PTR(-ENOMEM); +} + +static int rxe_dealloc_pd(struct ib_pd *ibpd) +{ + struct rxe_pd *pd = to_rpd(ibpd); + + rxe_drop_ref(pd); + return 0; +} + +static int rxe_init_av(struct rxe_dev *rxe, struct ib_ah_attr *attr, + struct rxe_av *av) +{ + int err; + union ib_gid sgid; + struct ib_gid_attr sgid_attr; + + err = ib_get_cached_gid(&rxe->ib_dev, attr->port_num, + attr->grh.sgid_index, &sgid, + &sgid_attr); + if (err) { + pr_err("Failed to query sgid. err = %d\n", err); + return err; + } + + err = rxe_av_from_attr(rxe, attr->port_num, av, attr); + if (!err) + err = rxe_av_fill_ip_info(rxe, av, attr, &sgid_attr, &sgid); + + if (sgid_attr.ndev) + dev_put(sgid_attr.ndev); + return err; +} + +static struct ib_ah *rxe_create_ah(struct ib_pd *ibpd, struct ib_ah_attr *attr) +{ + int err; + struct rxe_dev *rxe = to_rdev(ibpd->device); + struct rxe_pd *pd = to_rpd(ibpd); + struct rxe_ah *ah; + + err = rxe_av_chk_attr(rxe, attr); + if (err) + goto err1; + + ah = rxe_alloc(&rxe->ah_pool); + if (!ah) { + err = -ENOMEM; + goto err1; + } + + rxe_add_ref(pd); + ah->pd = pd; + + err = rxe_init_av(rxe, attr, &ah->av); + if (err) + goto err2; + + return &ah->ibah; + +err2: + rxe_drop_ref(pd); + rxe_drop_ref(ah); +err1: + return ERR_PTR(err); +} + +static int rxe_modify_ah(struct ib_ah *ibah, struct ib_ah_attr *attr) +{ + int err; + struct rxe_dev *rxe = to_rdev(ibah->device); + struct rxe_ah *ah = to_rah(ibah); + + err = rxe_av_chk_attr(rxe, attr); + if (err) + return err; + + err = rxe_init_av(rxe, attr, &ah->av); + if (err) + return err; + + return 0; +} + +static int rxe_query_ah(struct ib_ah *ibah, struct ib_ah_attr *attr) +{ + struct rxe_dev *rxe = to_rdev(ibah->device); + struct rxe_ah *ah = to_rah(ibah); + + rxe_av_to_attr(rxe, &ah->av, attr); + return 0; +} + +static int rxe_destroy_ah(struct ib_ah *ibah) +{ + struct rxe_ah *ah = to_rah(ibah); + + rxe_drop_ref(ah->pd); + rxe_drop_ref(ah); + return 0; +} + +static int post_one_recv(struct rxe_rq *rq, struct ib_recv_wr *ibwr) +{ + int err; + int i; + u32 length; + struct rxe_recv_wqe *recv_wqe; + int num_sge = ibwr->num_sge; + + if (unlikely(queue_full(rq->queue))) { + err = -ENOMEM; + goto err1; + } + + if (unlikely(num_sge > rq->max_sge)) { + err = -EINVAL; + goto err1; + } + + length = 0; + for (i = 0; i < num_sge; i++) + length += ibwr->sg_list[i].length; + + recv_wqe = producer_addr(rq->queue); + recv_wqe->wr_id = ibwr->wr_id; + recv_wqe->num_sge = num_sge; + + memcpy(recv_wqe->dma.sge, ibwr->sg_list, + num_sge * sizeof(struct ib_sge)); + + recv_wqe->dma.length = length; + recv_wqe->dma.resid = length; + recv_wqe->dma.num_sge = num_sge; + recv_wqe->dma.cur_sge = 0; + recv_wqe->dma.sge_offset = 0; + + /* make sure all changes to the work queue are written before we + * update the producer pointer + */ + smp_wmb(); + + advance_producer(rq->queue); + return 0; + +err1: + return err; +} + +static struct ib_srq *rxe_create_srq(struct ib_pd *ibpd, + struct ib_srq_init_attr *init, + struct ib_udata *udata) +{ + int err; + struct rxe_dev *rxe = to_rdev(ibpd->device); + struct rxe_pd *pd = to_rpd(ibpd); + struct rxe_srq *srq; + struct ib_ucontext *context = udata ? ibpd->uobject->context : NULL; + + err = rxe_srq_chk_attr(rxe, NULL, &init->attr, IB_SRQ_INIT_MASK); + if (err) + goto err1; + + srq = rxe_alloc(&rxe->srq_pool); + if (!srq) { + err = -ENOMEM; + goto err1; + } + + rxe_add_index(srq); + rxe_add_ref(pd); + srq->pd = pd; + + err = rxe_srq_from_init(rxe, srq, init, context, udata); + if (err) + goto err2; + + return &srq->ibsrq; + +err2: + rxe_drop_ref(pd); + rxe_drop_index(srq); + rxe_drop_ref(srq); +err1: + return ERR_PTR(err); +} + +static int rxe_modify_srq(struct ib_srq *ibsrq, struct ib_srq_attr *attr, + enum ib_srq_attr_mask mask, + struct ib_udata *udata) +{ + int err; + struct rxe_srq *srq = to_rsrq(ibsrq); + struct rxe_dev *rxe = to_rdev(ibsrq->device); + + err = rxe_srq_chk_attr(rxe, srq, attr, mask); + if (err) + goto err1; + + err = rxe_srq_from_attr(rxe, srq, attr, mask, udata); + if (err) + goto err1; + + return 0; + +err1: + return err; +} + +static int rxe_query_srq(struct ib_srq *ibsrq, struct ib_srq_attr *attr) +{ + struct rxe_srq *srq = to_rsrq(ibsrq); + + if (srq->error) + return -EINVAL; + + attr->max_wr = srq->rq.queue->buf->index_mask; + attr->max_sge = srq->rq.max_sge; + attr->srq_limit = srq->limit; + return 0; +} + +static int rxe_destroy_srq(struct ib_srq *ibsrq) +{ + struct rxe_srq *srq = to_rsrq(ibsrq); + + if (srq->rq.queue) + rxe_queue_cleanup(srq->rq.queue); + + rxe_drop_ref(srq->pd); + rxe_drop_index(srq); + rxe_drop_ref(srq); + + return 0; +} + +static int rxe_post_srq_recv(struct ib_srq *ibsrq, struct ib_recv_wr *wr, + struct ib_recv_wr **bad_wr) +{ + int err = 0; + unsigned long flags; + struct rxe_srq *srq = to_rsrq(ibsrq); + + spin_lock_irqsave(&srq->rq.producer_lock, flags); + + while (wr) { + err = post_one_recv(&srq->rq, wr); + if (unlikely(err)) + break; + wr = wr->next; + } + + spin_unlock_irqrestore(&srq->rq.producer_lock, flags); + + if (err) + *bad_wr = wr; + + return err; +} + +static struct ib_qp *rxe_create_qp(struct ib_pd *ibpd, + struct ib_qp_init_attr *init, + struct ib_udata *udata) +{ + int err; + struct rxe_dev *rxe = to_rdev(ibpd->device); + struct rxe_pd *pd = to_rpd(ibpd); + struct rxe_qp *qp; + + err = rxe_qp_chk_init(rxe, init); + if (err) + goto err1; + + qp = rxe_alloc(&rxe->qp_pool); + if (!qp) { + err = -ENOMEM; + goto err1; + } + + if (udata) { + if (udata->inlen) { + err = -EINVAL; + goto err1; + } + qp->is_user = 1; + } + + rxe_add_index(qp); + + err = rxe_qp_from_init(rxe, qp, pd, init, udata, ibpd); + if (err) + goto err2; + + return &qp->ibqp; + +err2: + rxe_drop_index(qp); + rxe_drop_ref(qp); +err1: + return ERR_PTR(err); +} + +static int rxe_modify_qp(struct ib_qp *ibqp, struct ib_qp_attr *attr, + int mask, struct ib_udata *udata) +{ + int err; + struct rxe_dev *rxe = to_rdev(ibqp->device); + struct rxe_qp *qp = to_rqp(ibqp); + + err = rxe_qp_chk_attr(rxe, qp, attr, mask); + if (err) + goto err1; + + err = rxe_qp_from_attr(qp, attr, mask, udata); + if (err) + goto err1; + + return 0; + +err1: + return err; +} + +static int rxe_query_qp(struct ib_qp *ibqp, struct ib_qp_attr *attr, + int mask, struct ib_qp_init_attr *init) +{ + struct rxe_qp *qp = to_rqp(ibqp); + + rxe_qp_to_init(qp, init); + rxe_qp_to_attr(qp, attr, mask); + + return 0; +} + +static int rxe_destroy_qp(struct ib_qp *ibqp) +{ + struct rxe_qp *qp = to_rqp(ibqp); + + rxe_qp_destroy(qp); + rxe_drop_index(qp); + rxe_drop_ref(qp); + return 0; +} + +static int validate_send_wr(struct rxe_qp *qp, struct ib_send_wr *ibwr, + unsigned int mask, unsigned int length) +{ + int num_sge = ibwr->num_sge; + struct rxe_sq *sq = &qp->sq; + + if (unlikely(num_sge > sq->max_sge)) + goto err1; + + if (unlikely(mask & WR_ATOMIC_MASK)) { + if (length < 8) + goto err1; + + if (atomic_wr(ibwr)->remote_addr & 0x7) + goto err1; + } + + if (unlikely((ibwr->send_flags & IB_SEND_INLINE) && + (length > sq->max_inline))) + goto err1; + + return 0; + +err1: + return -EINVAL; +} + +static void init_send_wr(struct rxe_qp *qp, struct rxe_send_wr *wr, + struct ib_send_wr *ibwr) +{ + wr->wr_id = ibwr->wr_id; + wr->num_sge = ibwr->num_sge; + wr->opcode = ibwr->opcode; + wr->send_flags = ibwr->send_flags; + + if (qp_type(qp) == IB_QPT_UD || + qp_type(qp) == IB_QPT_SMI || + qp_type(qp) == IB_QPT_GSI) { + wr->wr.ud.remote_qpn = ud_wr(ibwr)->remote_qpn; + wr->wr.ud.remote_qkey = ud_wr(ibwr)->remote_qkey; + if (qp_type(qp) == IB_QPT_GSI) + wr->wr.ud.pkey_index = ud_wr(ibwr)->pkey_index; + if (wr->opcode == IB_WR_SEND_WITH_IMM) + wr->ex.imm_data = ibwr->ex.imm_data; + } else { + switch (wr->opcode) { + case IB_WR_RDMA_WRITE_WITH_IMM: + wr->ex.imm_data = ibwr->ex.imm_data; + case IB_WR_RDMA_READ: + case IB_WR_RDMA_WRITE: + wr->wr.rdma.remote_addr = rdma_wr(ibwr)->remote_addr; + wr->wr.rdma.rkey = rdma_wr(ibwr)->rkey; + break; + case IB_WR_SEND_WITH_IMM: + wr->ex.imm_data = ibwr->ex.imm_data; + break; + case IB_WR_SEND_WITH_INV: + wr->ex.invalidate_rkey = ibwr->ex.invalidate_rkey; + break; + case IB_WR_ATOMIC_CMP_AND_SWP: + case IB_WR_ATOMIC_FETCH_AND_ADD: + wr->wr.atomic.remote_addr = + atomic_wr(ibwr)->remote_addr; + wr->wr.atomic.compare_add = + atomic_wr(ibwr)->compare_add; + wr->wr.atomic.swap = atomic_wr(ibwr)->swap; + wr->wr.atomic.rkey = atomic_wr(ibwr)->rkey; + break; + default: + break; + } + } +} + +static int init_send_wqe(struct rxe_qp *qp, struct ib_send_wr *ibwr, + unsigned int mask, unsigned int length, + struct rxe_send_wqe *wqe) +{ + int num_sge = ibwr->num_sge; + struct ib_sge *sge; + int i; + u8 *p; + + init_send_wr(qp, &wqe->wr, ibwr); + + if (qp_type(qp) == IB_QPT_UD || + qp_type(qp) == IB_QPT_SMI || + qp_type(qp) == IB_QPT_GSI) + memcpy(&wqe->av, &to_rah(ud_wr(ibwr)->ah)->av, sizeof(wqe->av)); + + if (unlikely(ibwr->send_flags & IB_SEND_INLINE)) { + p = wqe->dma.inline_data; + + sge = ibwr->sg_list; + for (i = 0; i < num_sge; i++, sge++) { + if (qp->is_user && copy_from_user(p, (__user void *) + (uintptr_t)sge->addr, sge->length)) + return -EFAULT; + + else if (!qp->is_user) + memcpy(p, (void *)(uintptr_t)sge->addr, + sge->length); + + p += sge->length; + } + } else + memcpy(wqe->dma.sge, ibwr->sg_list, + num_sge * sizeof(struct ib_sge)); + + wqe->iova = (mask & WR_ATOMIC_MASK) ? + atomic_wr(ibwr)->remote_addr : + rdma_wr(ibwr)->remote_addr; + wqe->mask = mask; + wqe->dma.length = length; + wqe->dma.resid = length; + wqe->dma.num_sge = num_sge; + wqe->dma.cur_sge = 0; + wqe->dma.sge_offset = 0; + wqe->state = wqe_state_posted; + wqe->ssn = atomic_add_return(1, &qp->ssn); + + return 0; +} + +static int post_one_send(struct rxe_qp *qp, struct ib_send_wr *ibwr, + unsigned mask, u32 length) +{ + int err; + struct rxe_sq *sq = &qp->sq; + struct rxe_send_wqe *send_wqe; + unsigned long flags; + + err = validate_send_wr(qp, ibwr, mask, length); + if (err) + return err; + + spin_lock_irqsave(&qp->sq.sq_lock, flags); + + if (unlikely(queue_full(sq->queue))) { + err = -ENOMEM; + goto err1; + } + + send_wqe = producer_addr(sq->queue); + + err = init_send_wqe(qp, ibwr, mask, length, send_wqe); + if (unlikely(err)) + goto err1; + + /* + * make sure all changes to the work queue are + * written before we update the producer pointer + */ + smp_wmb(); + + advance_producer(sq->queue); + spin_unlock_irqrestore(&qp->sq.sq_lock, flags); + + return 0; + +err1: + spin_unlock_irqrestore(&qp->sq.sq_lock, flags); + return err; +} + +static int rxe_post_send(struct ib_qp *ibqp, struct ib_send_wr *wr, + struct ib_send_wr **bad_wr) +{ + int err = 0; + struct rxe_qp *qp = to_rqp(ibqp); + unsigned int mask; + unsigned int length = 0; + int i; + int must_sched; + + if (unlikely(!qp->valid)) { + *bad_wr = wr; + return -EINVAL; + } + + if (unlikely(qp->req.state < QP_STATE_READY)) { + *bad_wr = wr; + return -EINVAL; + } + + while (wr) { + mask = wr_opcode_mask(wr->opcode, qp); + if (unlikely(!mask)) { + err = -EINVAL; + *bad_wr = wr; + break; + } + + if (unlikely((wr->send_flags & IB_SEND_INLINE) && + !(mask & WR_INLINE_MASK))) { + err = -EINVAL; + *bad_wr = wr; + break; + } + + length = 0; + for (i = 0; i < wr->num_sge; i++) + length += wr->sg_list[i].length; + + err = post_one_send(qp, wr, mask, length); + + if (err) { + *bad_wr = wr; + break; + } + wr = wr->next; + } + + /* + * Must sched in case of GSI QP because ib_send_mad() hold irq lock, + * and the requester call ip_local_out_sk() that takes spin_lock_bh. + */ + must_sched = (qp_type(qp) == IB_QPT_GSI) || + (queue_count(qp->sq.queue) > 1); + + rxe_run_task(&qp->req.task, must_sched); + + return err; +} + +static int rxe_post_recv(struct ib_qp *ibqp, struct ib_recv_wr *wr, + struct ib_recv_wr **bad_wr) +{ + int err = 0; + struct rxe_qp *qp = to_rqp(ibqp); + struct rxe_rq *rq = &qp->rq; + unsigned long flags; + + if (unlikely((qp_state(qp) < IB_QPS_INIT) || !qp->valid)) { + *bad_wr = wr; + err = -EINVAL; + goto err1; + } + + if (unlikely(qp->srq)) { + *bad_wr = wr; + err = -EINVAL; + goto err1; + } + + spin_lock_irqsave(&rq->producer_lock, flags); + + while (wr) { + err = post_one_recv(rq, wr); + if (unlikely(err)) { + *bad_wr = wr; + break; + } + wr = wr->next; + } + + spin_unlock_irqrestore(&rq->producer_lock, flags); + +err1: + return err; +} + +static struct ib_cq *rxe_create_cq(struct ib_device *dev, + const struct ib_cq_init_attr *attr, + struct ib_ucontext *context, + struct ib_udata *udata) +{ + int err; + struct rxe_dev *rxe = to_rdev(dev); + struct rxe_cq *cq; + + if (attr->flags) + return ERR_PTR(-EINVAL); + + err = rxe_cq_chk_attr(rxe, NULL, attr->cqe, attr->comp_vector, udata); + if (err) + goto err1; + + cq = rxe_alloc(&rxe->cq_pool); + if (!cq) { + err = -ENOMEM; + goto err1; + } + + err = rxe_cq_from_init(rxe, cq, attr->cqe, attr->comp_vector, + context, udata); + if (err) + goto err2; + + return &cq->ibcq; + +err2: + rxe_drop_ref(cq); +err1: + return ERR_PTR(err); +} + +static int rxe_destroy_cq(struct ib_cq *ibcq) +{ + struct rxe_cq *cq = to_rcq(ibcq); + + rxe_drop_ref(cq); + return 0; +} + +static int rxe_resize_cq(struct ib_cq *ibcq, int cqe, struct ib_udata *udata) +{ + int err; + struct rxe_cq *cq = to_rcq(ibcq); + struct rxe_dev *rxe = to_rdev(ibcq->device); + + err = rxe_cq_chk_attr(rxe, cq, cqe, 0, udata); + if (err) + goto err1; + + err = rxe_cq_resize_queue(cq, cqe, udata); + if (err) + goto err1; + + return 0; + +err1: + return err; +} + +static int rxe_poll_cq(struct ib_cq *ibcq, int num_entries, struct ib_wc *wc) +{ + int i; + struct rxe_cq *cq = to_rcq(ibcq); + struct rxe_cqe *cqe; + unsigned long flags; + + spin_lock_irqsave(&cq->cq_lock, flags); + for (i = 0; i < num_entries; i++) { + cqe = queue_head(cq->queue); + if (!cqe) + break; + + memcpy(wc++, &cqe->ibwc, sizeof(*wc)); + advance_consumer(cq->queue); + } + spin_unlock_irqrestore(&cq->cq_lock, flags); + + return i; +} + +static int rxe_peek_cq(struct ib_cq *ibcq, int wc_cnt) +{ + struct rxe_cq *cq = to_rcq(ibcq); + int count = queue_count(cq->queue); + + return (count > wc_cnt) ? wc_cnt : count; +} + +static int rxe_req_notify_cq(struct ib_cq *ibcq, enum ib_cq_notify_flags flags) +{ + struct rxe_cq *cq = to_rcq(ibcq); + + if (cq->notify != IB_CQ_NEXT_COMP) + cq->notify = flags & IB_CQ_SOLICITED_MASK; + + return 0; +} + +static struct ib_mr *rxe_get_dma_mr(struct ib_pd *ibpd, int access) +{ + struct rxe_dev *rxe = to_rdev(ibpd->device); + struct rxe_pd *pd = to_rpd(ibpd); + struct rxe_mem *mr; + int err; + + mr = rxe_alloc(&rxe->mr_pool); + if (!mr) { + err = -ENOMEM; + goto err1; + } + + rxe_add_index(mr); + + rxe_add_ref(pd); + + err = rxe_mem_init_dma(rxe, pd, access, mr); + if (err) + goto err2; + + return &mr->ibmr; + +err2: + rxe_drop_ref(pd); + rxe_drop_index(mr); + rxe_drop_ref(mr); +err1: + return ERR_PTR(err); +} + +static struct ib_mr *rxe_reg_user_mr(struct ib_pd *ibpd, + u64 start, + u64 length, + u64 iova, + int access, struct ib_udata *udata) +{ + int err; + struct rxe_dev *rxe = to_rdev(ibpd->device); + struct rxe_pd *pd = to_rpd(ibpd); + struct rxe_mem *mr; + + mr = rxe_alloc(&rxe->mr_pool); + if (!mr) { + err = -ENOMEM; + goto err2; + } + + rxe_add_index(mr); + + rxe_add_ref(pd); + + err = rxe_mem_init_user(rxe, pd, start, length, iova, + access, udata, mr); + if (err) + goto err3; + + return &mr->ibmr; + +err3: + rxe_drop_ref(pd); + rxe_drop_index(mr); + rxe_drop_ref(mr); +err2: + return ERR_PTR(err); +} + +static int rxe_dereg_mr(struct ib_mr *ibmr) +{ + struct rxe_mem *mr = to_rmr(ibmr); + + mr->state = RXE_MEM_STATE_ZOMBIE; + rxe_drop_ref(mr->pd); + rxe_drop_index(mr); + rxe_drop_ref(mr); + return 0; +} + +static struct ib_mr *rxe_alloc_mr(struct ib_pd *ibpd, + enum ib_mr_type mr_type, + u32 max_num_sg) +{ + struct rxe_dev *rxe = to_rdev(ibpd->device); + struct rxe_pd *pd = to_rpd(ibpd); + struct rxe_mem *mr; + int err; + + if (mr_type != IB_MR_TYPE_MEM_REG) + return ERR_PTR(-EINVAL); + + mr = rxe_alloc(&rxe->mr_pool); + if (!mr) { + err = -ENOMEM; + goto err1; + } + + rxe_add_index(mr); + + rxe_add_ref(pd); + + err = rxe_mem_init_fast(rxe, pd, max_num_sg, mr); + if (err) + goto err2; + + return &mr->ibmr; + +err2: + rxe_drop_ref(pd); + rxe_drop_index(mr); + rxe_drop_ref(mr); +err1: + return ERR_PTR(err); +} + +static struct ib_fmr *rxe_alloc_fmr(struct ib_pd *ibpd, + int access, struct ib_fmr_attr *attr) +{ + struct rxe_dev *rxe = to_rdev(ibpd->device); + struct rxe_pd *pd = to_rpd(ibpd); + struct rxe_mem *fmr; + int err; + + fmr = rxe_alloc(&rxe->fmr_pool); + if (!fmr) { + err = -ENOMEM; + goto err1; + } + + rxe_add_index(fmr); + + rxe_add_ref(pd); + + err = rxe_mem_init_fmr(rxe, pd, access, attr, fmr); + if (err) + goto err2; + + return &fmr->ibfmr; + +err2: + rxe_drop_ref(pd); + rxe_drop_index(fmr); + rxe_drop_ref(fmr); +err1: + return ERR_PTR(err); +} + +static int rxe_map_phys_fmr(struct ib_fmr *ibfmr, + u64 *page_list, int list_length, u64 iova) +{ + struct rxe_mem *fmr = to_rfmr(ibfmr); + struct rxe_dev *rxe = to_rdev(ibfmr->device); + + return rxe_mem_map_pages(rxe, fmr, page_list, list_length, iova); +} + +static int rxe_unmap_fmr(struct list_head *fmr_list) +{ + struct rxe_mem *fmr; + + list_for_each_entry(fmr, fmr_list, ibfmr.list) { + if (fmr->state != RXE_MEM_STATE_VALID) + continue; + + fmr->va = 0; + fmr->iova = 0; + fmr->length = 0; + fmr->num_buf = 0; + fmr->state = RXE_MEM_STATE_FREE; + } + + return 0; +} + +static int rxe_dealloc_fmr(struct ib_fmr *ibfmr) +{ + struct rxe_mem *fmr = to_rfmr(ibfmr); + + fmr->state = RXE_MEM_STATE_ZOMBIE; + rxe_drop_ref(fmr->pd); + rxe_drop_index(fmr); + rxe_drop_ref(fmr); + return 0; +} + +static int rxe_attach_mcast(struct ib_qp *ibqp, union ib_gid *mgid, u16 mlid) +{ + int err; + struct rxe_dev *rxe = to_rdev(ibqp->device); + struct rxe_qp *qp = to_rqp(ibqp); + struct rxe_mc_grp *grp; + + /* takes a ref on grp if successful */ + err = rxe_mcast_get_grp(rxe, mgid, &grp); + if (err) + return err; + + err = rxe_mcast_add_grp_elem(rxe, qp, grp); + + rxe_drop_ref(grp); + return err; +} + +static int rxe_detach_mcast(struct ib_qp *ibqp, union ib_gid *mgid, u16 mlid) +{ + struct rxe_dev *rxe = to_rdev(ibqp->device); + struct rxe_qp *qp = to_rqp(ibqp); + + return rxe_mcast_drop_grp_elem(rxe, qp, mgid); +} + +static ssize_t rxe_show_parent(struct device *device, + struct device_attribute *attr, char *buf) +{ + struct rxe_dev *rxe = container_of(device, struct rxe_dev, + ib_dev.dev); + char *name; + + name = rxe->ifc_ops->parent_name(rxe, 1); + return snprintf(buf, 16, "%s\n", name); +} + +static DEVICE_ATTR(parent, S_IRUGO, rxe_show_parent, NULL); + +static struct device_attribute *rxe_dev_attributes[] = { + &dev_attr_parent, +}; + +int rxe_register_device(struct rxe_dev *rxe) +{ + int err; + int i; + struct ib_device *dev = &rxe->ib_dev; + + strlcpy(dev->name, "rxe%d", IB_DEVICE_NAME_MAX); + strlcpy(dev->node_desc, "rxe", sizeof(dev->node_desc)); + + dev->owner = THIS_MODULE; + dev->node_type = RDMA_NODE_IB_CA; + dev->phys_port_cnt = rxe->num_ports; + dev->num_comp_vectors = RXE_NUM_COMP_VECTORS; + dev->dma_device = rxe->ifc_ops->dma_device(rxe); + dev->local_dma_lkey = 0; + dev->node_guid = rxe->ifc_ops->node_guid(rxe); + dev->dma_ops = &rxe_dma_mapping_ops; + + dev->uverbs_abi_ver = RXE_UVERBS_ABI_VERSION; + dev->uverbs_cmd_mask = BIT_ULL(IB_USER_VERBS_CMD_GET_CONTEXT) + | BIT_ULL(IB_USER_VERBS_CMD_CREATE_COMP_CHANNEL) + | BIT_ULL(IB_USER_VERBS_CMD_QUERY_DEVICE) + | BIT_ULL(IB_USER_VERBS_CMD_QUERY_PORT) + | BIT_ULL(IB_USER_VERBS_CMD_ALLOC_PD) + | BIT_ULL(IB_USER_VERBS_CMD_DEALLOC_PD) + | BIT_ULL(IB_USER_VERBS_CMD_CREATE_SRQ) + | BIT_ULL(IB_USER_VERBS_CMD_MODIFY_SRQ) + | BIT_ULL(IB_USER_VERBS_CMD_QUERY_SRQ) + | BIT_ULL(IB_USER_VERBS_CMD_DESTROY_SRQ) + | BIT_ULL(IB_USER_VERBS_CMD_POST_SRQ_RECV) + | BIT_ULL(IB_USER_VERBS_CMD_CREATE_QP) + | BIT_ULL(IB_USER_VERBS_CMD_MODIFY_QP) + | BIT_ULL(IB_USER_VERBS_CMD_QUERY_QP) + | BIT_ULL(IB_USER_VERBS_CMD_DESTROY_QP) + | BIT_ULL(IB_USER_VERBS_CMD_POST_SEND) + | BIT_ULL(IB_USER_VERBS_CMD_POST_RECV) + | BIT_ULL(IB_USER_VERBS_CMD_CREATE_CQ) + | BIT_ULL(IB_USER_VERBS_CMD_RESIZE_CQ) + | BIT_ULL(IB_USER_VERBS_CMD_DESTROY_CQ) + | BIT_ULL(IB_USER_VERBS_CMD_POLL_CQ) + | BIT_ULL(IB_USER_VERBS_CMD_PEEK_CQ) + | BIT_ULL(IB_USER_VERBS_CMD_REQ_NOTIFY_CQ) + | BIT_ULL(IB_USER_VERBS_CMD_REG_MR) + | BIT_ULL(IB_USER_VERBS_CMD_DEREG_MR) + | BIT_ULL(IB_USER_VERBS_CMD_CREATE_AH) + | BIT_ULL(IB_USER_VERBS_CMD_MODIFY_AH) + | BIT_ULL(IB_USER_VERBS_CMD_QUERY_AH) + | BIT_ULL(IB_USER_VERBS_CMD_DESTROY_AH) + | BIT_ULL(IB_USER_VERBS_CMD_ATTACH_MCAST) + | BIT_ULL(IB_USER_VERBS_CMD_DETACH_MCAST) + ; + + dev->query_device = rxe_query_device; + dev->modify_device = rxe_modify_device; + dev->query_port = rxe_query_port; + dev->modify_port = rxe_modify_port; + dev->get_link_layer = rxe_get_link_layer; + dev->query_gid = rxe_query_gid; + dev->get_netdev = rxe_get_netdev; + dev->add_gid = rxe_add_gid; + dev->del_gid = rxe_del_gid; + dev->query_pkey = rxe_query_pkey; + dev->alloc_ucontext = rxe_alloc_ucontext; + dev->dealloc_ucontext = rxe_dealloc_ucontext; + dev->mmap = rxe_mmap; + dev->get_port_immutable = rxe_port_immutable; + dev->alloc_pd = rxe_alloc_pd; + dev->dealloc_pd = rxe_dealloc_pd; + dev->create_ah = rxe_create_ah; + dev->modify_ah = rxe_modify_ah; + dev->query_ah = rxe_query_ah; + dev->destroy_ah = rxe_destroy_ah; + dev->create_srq = rxe_create_srq; + dev->modify_srq = rxe_modify_srq; + dev->query_srq = rxe_query_srq; + dev->destroy_srq = rxe_destroy_srq; + dev->post_srq_recv = rxe_post_srq_recv; + dev->create_qp = rxe_create_qp; + dev->modify_qp = rxe_modify_qp; + dev->query_qp = rxe_query_qp; + dev->destroy_qp = rxe_destroy_qp; + dev->post_send = rxe_post_send; + dev->post_recv = rxe_post_recv; + dev->create_cq = rxe_create_cq; + dev->destroy_cq = rxe_destroy_cq; + dev->resize_cq = rxe_resize_cq; + dev->poll_cq = rxe_poll_cq; + dev->peek_cq = rxe_peek_cq; + dev->req_notify_cq = rxe_req_notify_cq; + dev->get_dma_mr = rxe_get_dma_mr; + dev->reg_user_mr = rxe_reg_user_mr; + dev->dereg_mr = rxe_dereg_mr; + dev->alloc_mr = rxe_alloc_mr; + dev->alloc_fmr = rxe_alloc_fmr; + dev->map_phys_fmr = rxe_map_phys_fmr; + dev->unmap_fmr = rxe_unmap_fmr; + dev->dealloc_fmr = rxe_dealloc_fmr; + dev->attach_mcast = rxe_attach_mcast; + dev->detach_mcast = rxe_detach_mcast; + + err = ib_register_device(dev, NULL); + if (err) { + pr_warn("rxe_register_device failed, err = %d\n", err); + goto err1; + } + + for (i = 0; i < ARRAY_SIZE(rxe_dev_attributes); ++i) { + err = device_create_file(&dev->dev, rxe_dev_attributes[i]); + if (err) { + pr_warn("device_create_file failed, i = %d, err = %d\n", + i, err); + goto err2; + } + } + + return 0; + +err2: + ib_unregister_device(dev); +err1: + return err; +} + +int rxe_unregister_device(struct rxe_dev *rxe) +{ + int i; + struct ib_device *dev = &rxe->ib_dev; + + for (i = 0; i < ARRAY_SIZE(rxe_dev_attributes); ++i) + device_remove_file(&dev->dev, rxe_dev_attributes[i]); + + ib_unregister_device(dev); + + return 0; +} diff --git a/drivers/infiniband/hw/rxe/rxe_verbs.h b/drivers/infiniband/hw/rxe/rxe_verbs.h new file mode 100644 index 0000000..5783de9 --- /dev/null +++ b/drivers/infiniband/hw/rxe/rxe_verbs.h @@ -0,0 +1,486 @@ +/* + * Copyright (c) 2016 Mellanox Technologies Ltd. All rights reserved. + * Copyright (c) 2015 System Fabric Works, 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. + */ + +#ifndef RXE_VERBS_H +#define RXE_VERBS_H + +#include +#include +#include "rxe_pool.h" +#include "rxe_task.h" + +static inline int pkey_match(u16 key1, u16 key2) +{ + return (((key1 & 0x7fff) != 0) && + ((key1 & 0x7fff) == (key2 & 0x7fff)) && + ((key1 & 0x8000) || (key2 & 0x8000))) ? 1 : 0; +} + +/* Return >0 if psn_a > psn_b + * 0 if psn_a == psn_b + * <0 if psn_a < psn_b + */ +static inline int psn_compare(u32 psn_a, u32 psn_b) +{ + s32 diff; + + diff = (psn_a - psn_b) << 8; + return diff; +} + +struct rxe_ucontext { + struct rxe_pool_entry pelem; + struct ib_ucontext ibuc; +}; + +struct rxe_pd { + struct rxe_pool_entry pelem; + struct ib_pd ibpd; +}; + +struct rxe_ah { + struct rxe_pool_entry pelem; + struct ib_ah ibah; + struct rxe_pd *pd; + struct rxe_av av; +}; + +struct rxe_cqe { + union { + struct ib_wc ibwc; + struct ib_uverbs_wc uibwc; + }; +}; + +struct rxe_cq { + struct rxe_pool_entry pelem; + struct ib_cq ibcq; + struct rxe_queue *queue; + spinlock_t cq_lock; + u8 notify; + int is_user; + struct tasklet_struct comp_task; +}; + +enum wqe_state { + wqe_state_posted, + wqe_state_processing, + wqe_state_pending, + wqe_state_done, + wqe_state_error, +}; + +struct rxe_sq { + int max_wr; + int max_sge; + int max_inline; + spinlock_t sq_lock; /* guard queue */ + struct rxe_queue *queue; +}; + +struct rxe_rq { + int max_wr; + int max_sge; + spinlock_t producer_lock; /* guard queue producer */ + spinlock_t consumer_lock; /* guard queue consumer */ + struct rxe_queue *queue; +}; + +struct rxe_srq { + struct rxe_pool_entry pelem; + struct ib_srq ibsrq; + struct rxe_pd *pd; + struct rxe_rq rq; + u32 srq_num; + + int limit; + int error; +}; + +enum rxe_qp_state { + QP_STATE_RESET, + QP_STATE_INIT, + QP_STATE_READY, + QP_STATE_DRAIN, /* req only */ + QP_STATE_DRAINED, /* req only */ + QP_STATE_ERROR +}; + +extern char *rxe_qp_state_name[]; + +struct rxe_req_info { + enum rxe_qp_state state; + int wqe_index; + u32 psn; + int opcode; + atomic_t rd_atomic; + int wait_fence; + int need_rd_atomic; + int wait_psn; + int need_retry; + int noack_pkts; + struct rxe_task task; +}; + +struct rxe_comp_info { + u32 psn; + int opcode; + int timeout; + int timeout_retry; + u32 retry_cnt; + u32 rnr_retry; + struct rxe_task task; +}; + +enum rdatm_res_state { + rdatm_res_state_next, + rdatm_res_state_new, + rdatm_res_state_replay, +}; + +struct resp_res { + int type; + u32 first_psn; + u32 last_psn; + u32 cur_psn; + enum rdatm_res_state state; + + union { + struct { + struct sk_buff *skb; + } atomic; + struct { + struct rxe_mem *mr; + u64 va_org; + u32 rkey; + u32 length; + u64 va; + u32 resid; + } read; + }; +}; + +struct rxe_resp_info { + enum rxe_qp_state state; + u32 msn; + u32 psn; + int opcode; + int drop_msg; + int goto_error; + int sent_psn_nak; + enum ib_wc_status status; + u8 aeth_syndrome; + + /* Receive only */ + struct rxe_recv_wqe *wqe; + + /* RDMA read / atomic only */ + u64 va; + struct rxe_mem *mr; + u32 resid; + u32 rkey; + u64 atomic_orig; + + /* SRQ only */ + struct { + struct rxe_recv_wqe wqe; + struct ib_sge sge[RXE_MAX_SGE]; + } srq_wqe; + + /* Responder resources. It's a circular list where the oldest + * resource is dropped first. + */ + struct resp_res *resources; + unsigned int res_head; + unsigned int res_tail; + struct resp_res *res; + struct rxe_task task; +}; + +struct rxe_qp { + struct rxe_pool_entry pelem; + struct ib_qp ibqp; + struct ib_qp_attr attr; + unsigned int valid; + unsigned int mtu; + int is_user; + + struct rxe_pd *pd; + struct rxe_srq *srq; + struct rxe_cq *scq; + struct rxe_cq *rcq; + + enum ib_sig_type sq_sig_type; + + struct rxe_sq sq; + struct rxe_rq rq; + + struct socket *sk; + + struct rxe_av pri_av; + struct rxe_av alt_av; + + /* list of mcast groups qp has joined (for cleanup) */ + struct list_head grp_list; + spinlock_t grp_lock; /* guard grp_list */ + + struct sk_buff_head req_pkts; + struct sk_buff_head resp_pkts; + struct sk_buff_head send_pkts; + + struct rxe_req_info req; + struct rxe_comp_info comp; + struct rxe_resp_info resp; + + atomic_t ssn; + atomic_t skb_out; + int need_req_skb; + + /* Timer for retranmitting packet when ACKs have been lost. RC + * only. The requester sets it when it is not already + * started. The responder resets it whenever an ack is + * received. + */ + struct timer_list retrans_timer; + u64 qp_timeout_jiffies; + + /* Timer for handling RNR NAKS. */ + struct timer_list rnr_nak_timer; + + spinlock_t state_lock; /* guard requester and completer */ +}; + +enum rxe_mem_state { + RXE_MEM_STATE_ZOMBIE, + RXE_MEM_STATE_INVALID, + RXE_MEM_STATE_FREE, + RXE_MEM_STATE_VALID, +}; + +enum rxe_mem_type { + RXE_MEM_TYPE_NONE, + RXE_MEM_TYPE_DMA, + RXE_MEM_TYPE_MR, + RXE_MEM_TYPE_FMR, + RXE_MEM_TYPE_MW, +}; + +#define RXE_BUF_PER_MAP (PAGE_SIZE / sizeof(struct rxe_phys_buf)) + +struct rxe_phys_buf { + u64 addr; + u64 size; +}; + +struct rxe_map { + struct rxe_phys_buf buf[RXE_BUF_PER_MAP]; +}; + +struct rxe_mem { + struct rxe_pool_entry pelem; + union { + struct ib_mr ibmr; + struct ib_fmr ibfmr; + struct ib_mw ibmw; + }; + + struct rxe_pd *pd; + struct ib_umem *umem; + + u32 lkey; + u32 rkey; + + enum rxe_mem_state state; + enum rxe_mem_type type; + u64 va; + u64 iova; + size_t length; + u32 offset; + int access; + + int page_shift; + int page_mask; + int map_shift; + int map_mask; + + u32 num_buf; + + u32 max_buf; + u32 num_map; + + struct rxe_map **map; +}; + +struct rxe_mc_grp { + struct rxe_pool_entry pelem; + spinlock_t mcg_lock; /* guard group */ + struct rxe_dev *rxe; + struct list_head qp_list; + union ib_gid mgid; + int num_qp; + u32 qkey; + u16 pkey; +}; + +struct rxe_mc_elem { + struct rxe_pool_entry pelem; + struct list_head qp_list; + struct list_head grp_list; + struct rxe_qp *qp; + struct rxe_mc_grp *grp; +}; + +struct rxe_port { + struct ib_port_attr attr; + u16 *pkey_tbl; + __be64 port_guid; + __be64 subnet_prefix; + spinlock_t port_lock; /* guard port */ + unsigned int mtu_cap; + /* special QPs */ + u32 qp_smi_index; + u32 qp_gsi_index; +}; + +/* callbacks from ib_rxe to network interface layer */ +struct rxe_ifc_ops { + void (*release)(struct rxe_dev *rxe); + __be64 (*node_guid)(struct rxe_dev *rxe); + __be64 (*port_guid)(struct rxe_dev *rxe, unsigned int port_num); + struct device *(*dma_device)(struct rxe_dev *rxe); + int (*mcast_add)(struct rxe_dev *rxe, union ib_gid *mgid); + int (*mcast_delete)(struct rxe_dev *rxe, union ib_gid *mgid); + int (*prepare)(struct rxe_dev *rxe, struct rxe_pkt_info *pkt, + struct sk_buff *skb, u32 *crc); + int (*send)(struct rxe_dev *rxe, struct rxe_pkt_info *pkt, + struct sk_buff *skb); + int (*loopback)(struct sk_buff *skb); + struct sk_buff *(*init_packet)(struct rxe_dev *rxe, struct rxe_av *av, + int paylen, struct rxe_pkt_info *pkt); + char *(*parent_name)(struct rxe_dev *rxe, unsigned int port_num); + enum rdma_link_layer (*link_layer)(struct rxe_dev *rxe, + unsigned int port_num); +}; + +struct rxe_dev { + struct ib_device ib_dev; + struct ib_device_attr attr; + int max_ucontext; + int max_inline_data; + struct kref ref_cnt; + struct mutex usdev_lock; + + struct rxe_ifc_ops *ifc_ops; + + struct net_device *ndev; + + int xmit_errors; + + struct rxe_pool uc_pool; + struct rxe_pool pd_pool; + struct rxe_pool ah_pool; + struct rxe_pool srq_pool; + struct rxe_pool qp_pool; + struct rxe_pool cq_pool; + struct rxe_pool mr_pool; + struct rxe_pool mw_pool; + struct rxe_pool fmr_pool; + struct rxe_pool mc_grp_pool; + struct rxe_pool mc_elem_pool; + + spinlock_t pending_lock; /* guard pending_mmaps */ + struct list_head pending_mmaps; + + spinlock_t mmap_offset_lock; /* guard mmap_offset */ + int mmap_offset; + + u8 num_ports; + struct rxe_port *port; +}; + +static inline struct rxe_dev *to_rdev(struct ib_device *dev) +{ + return dev ? container_of(dev, struct rxe_dev, ib_dev) : NULL; +} + +static inline struct rxe_ucontext *to_ruc(struct ib_ucontext *uc) +{ + return uc ? container_of(uc, struct rxe_ucontext, ibuc) : NULL; +} + +static inline struct rxe_pd *to_rpd(struct ib_pd *pd) +{ + return pd ? container_of(pd, struct rxe_pd, ibpd) : NULL; +} + +static inline struct rxe_ah *to_rah(struct ib_ah *ah) +{ + return ah ? container_of(ah, struct rxe_ah, ibah) : NULL; +} + +static inline struct rxe_srq *to_rsrq(struct ib_srq *srq) +{ + return srq ? container_of(srq, struct rxe_srq, ibsrq) : NULL; +} + +static inline struct rxe_qp *to_rqp(struct ib_qp *qp) +{ + return qp ? container_of(qp, struct rxe_qp, ibqp) : NULL; +} + +static inline struct rxe_cq *to_rcq(struct ib_cq *cq) +{ + return cq ? container_of(cq, struct rxe_cq, ibcq) : NULL; +} + +static inline struct rxe_mem *to_rmr(struct ib_mr *mr) +{ + return mr ? container_of(mr, struct rxe_mem, ibmr) : NULL; +} + +static inline struct rxe_mem *to_rfmr(struct ib_fmr *fmr) +{ + return fmr ? container_of(fmr, struct rxe_mem, ibfmr) : NULL; +} + +static inline struct rxe_mem *to_rmw(struct ib_mw *mw) +{ + return mw ? container_of(mw, struct rxe_mem, ibmw) : NULL; +} + +int rxe_register_device(struct rxe_dev *rxe); +int rxe_unregister_device(struct rxe_dev *rxe); + +void rxe_mc_cleanup(void *arg); + +#endif /* RXE_VERBS_H */