| /* |
| * 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)) { |
| pr_warn("invalid port_number %d\n", port_num); |
| goto err1; |
| } |
| |
| port = &rxe->port; |
| |
| *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)) { |
| dev_warn(device->dma_device, "invalid port_num = %d\n", |
| port_num); |
| goto err1; |
| } |
| |
| port = &rxe->port; |
| |
| 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)) { |
| pr_warn("invalid port_num = %d\n", port_num); |
| goto err1; |
| } |
| |
| port = &rxe->port; |
| |
| 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, |
| struct ib_udata *udata) |
| |
| { |
| 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 err2; |
| } |
| qp->is_user = 1; |
| } |
| |
| rxe_add_index(qp); |
| |
| err = rxe_qp_from_init(rxe, qp, pd, init, udata, ibpd); |
| if (err) |
| goto err3; |
| |
| return &qp->ibqp; |
| |
| err3: |
| rxe_drop_index(qp); |
| err2: |
| 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; |
| case IB_WR_LOCAL_INV: |
| wr->ex.invalidate_rkey = ibwr->ex.invalidate_rkey; |
| break; |
| case IB_WR_REG_MR: |
| wr->wr.reg.mr = reg_wr(ibwr)->mr; |
| wr->wr.reg.key = reg_wr(ibwr)->key; |
| wr->wr.reg.access = reg_wr(ibwr)->access; |
| 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 if (mask & WR_REG_MASK) { |
| wqe->mask = mask; |
| wqe->state = wqe_state_posted; |
| return 0; |
| } 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 int 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_kernel(struct rxe_qp *qp, struct ib_send_wr *wr, |
| struct ib_send_wr **bad_wr) |
| { |
| int err = 0; |
| unsigned int mask; |
| unsigned int length = 0; |
| int i; |
| int must_sched; |
| |
| 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_send(struct ib_qp *ibqp, struct ib_send_wr *wr, |
| struct ib_send_wr **bad_wr) |
| { |
| struct rxe_qp *qp = to_rqp(ibqp); |
| |
| if (unlikely(!qp->valid)) { |
| *bad_wr = wr; |
| return -EINVAL; |
| } |
| |
| if (unlikely(qp->req.state < QP_STATE_READY)) { |
| *bad_wr = wr; |
| return -EINVAL; |
| } |
| |
| if (qp->is_user) { |
| /* Utilize process context to do protocol processing */ |
| rxe_run_task(&qp->req.task, 0); |
| return 0; |
| } else |
| return rxe_post_send_kernel(qp, wr, bad_wr); |
| } |
| |
| 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); |
| unsigned long irq_flags; |
| int ret = 0; |
| |
| spin_lock_irqsave(&cq->cq_lock, irq_flags); |
| if (cq->notify != IB_CQ_NEXT_COMP) |
| cq->notify = flags & IB_CQ_SOLICITED_MASK; |
| |
| if ((flags & IB_CQ_REPORT_MISSED_EVENTS) && !queue_empty(cq->queue)) |
| ret = 1; |
| |
| spin_unlock_irqrestore(&cq->cq_lock, irq_flags); |
| |
| return ret; |
| } |
| |
| 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 int rxe_set_page(struct ib_mr *ibmr, u64 addr) |
| { |
| struct rxe_mem *mr = to_rmr(ibmr); |
| struct rxe_map *map; |
| struct rxe_phys_buf *buf; |
| |
| if (unlikely(mr->nbuf == mr->num_buf)) |
| return -ENOMEM; |
| |
| map = mr->map[mr->nbuf / RXE_BUF_PER_MAP]; |
| buf = &map->buf[mr->nbuf % RXE_BUF_PER_MAP]; |
| |
| buf->addr = addr; |
| buf->size = ibmr->page_size; |
| mr->nbuf++; |
| |
| return 0; |
| } |
| |
| static int rxe_map_mr_sg(struct ib_mr *ibmr, struct scatterlist *sg, |
| int sg_nents, unsigned int *sg_offset) |
| { |
| struct rxe_mem *mr = to_rmr(ibmr); |
| int n; |
| |
| mr->nbuf = 0; |
| |
| n = ib_sg_to_pages(ibmr, sg, sg_nents, sg_offset, rxe_set_page); |
| |
| mr->va = ibmr->iova; |
| mr->iova = ibmr->iova; |
| mr->length = ibmr->length; |
| mr->page_shift = ilog2(ibmr->page_size); |
| mr->page_mask = ibmr->page_size - 1; |
| mr->offset = mr->iova & mr->page_mask; |
| |
| return n; |
| } |
| |
| 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 = 1; |
| 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->map_mr_sg = rxe_map_mr_sg; |
| 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; |
| } |