diff options
Diffstat (limited to 'drivers/infiniband/sw/rxe/rxe_verbs.c')
-rw-r--r-- | drivers/infiniband/sw/rxe/rxe_verbs.c | 1533 |
1 files changed, 1533 insertions, 0 deletions
diff --git a/drivers/infiniband/sw/rxe/rxe_verbs.c b/drivers/infiniband/sw/rxe/rxe_verbs.c new file mode 100644 index 0000000000..48f86839d3 --- /dev/null +++ b/drivers/infiniband/sw/rxe/rxe_verbs.c @@ -0,0 +1,1533 @@ +// SPDX-License-Identifier: GPL-2.0 OR Linux-OpenIB +/* + * Copyright (c) 2016 Mellanox Technologies Ltd. All rights reserved. + * Copyright (c) 2015 System Fabric Works, Inc. All rights reserved. + */ + +#include <linux/dma-mapping.h> +#include <net/addrconf.h> +#include <rdma/uverbs_ioctl.h> + +#include "rxe.h" +#include "rxe_queue.h" +#include "rxe_hw_counters.h" + +static int post_one_recv(struct rxe_rq *rq, const struct ib_recv_wr *ibwr); + +/* dev */ +static int rxe_query_device(struct ib_device *ibdev, + struct ib_device_attr *attr, + struct ib_udata *udata) +{ + struct rxe_dev *rxe = to_rdev(ibdev); + int err; + + if (udata->inlen || udata->outlen) { + rxe_dbg_dev(rxe, "malformed udata"); + err = -EINVAL; + goto err_out; + } + + memcpy(attr, &rxe->attr, sizeof(*attr)); + + return 0; + +err_out: + rxe_err_dev(rxe, "returned err = %d", err); + return err; +} + +static int rxe_query_port(struct ib_device *ibdev, + u32 port_num, struct ib_port_attr *attr) +{ + struct rxe_dev *rxe = to_rdev(ibdev); + int err, ret; + + if (port_num != 1) { + err = -EINVAL; + rxe_dbg_dev(rxe, "bad port_num = %d", port_num); + goto err_out; + } + + memcpy(attr, &rxe->port.attr, sizeof(*attr)); + + mutex_lock(&rxe->usdev_lock); + ret = ib_get_eth_speed(ibdev, port_num, &attr->active_speed, + &attr->active_width); + + if (attr->state == IB_PORT_ACTIVE) + attr->phys_state = IB_PORT_PHYS_STATE_LINK_UP; + else if (dev_get_flags(rxe->ndev) & IFF_UP) + attr->phys_state = IB_PORT_PHYS_STATE_POLLING; + else + attr->phys_state = IB_PORT_PHYS_STATE_DISABLED; + + mutex_unlock(&rxe->usdev_lock); + + return ret; + +err_out: + rxe_err_dev(rxe, "returned err = %d", err); + return err; +} + +static int rxe_query_pkey(struct ib_device *ibdev, + u32 port_num, u16 index, u16 *pkey) +{ + struct rxe_dev *rxe = to_rdev(ibdev); + int err; + + if (index != 0) { + err = -EINVAL; + rxe_dbg_dev(rxe, "bad pkey index = %d", index); + goto err_out; + } + + *pkey = IB_DEFAULT_PKEY_FULL; + return 0; + +err_out: + rxe_err_dev(rxe, "returned err = %d", err); + return err; +} + +static int rxe_modify_device(struct ib_device *ibdev, + int mask, struct ib_device_modify *attr) +{ + struct rxe_dev *rxe = to_rdev(ibdev); + int err; + + if (mask & ~(IB_DEVICE_MODIFY_SYS_IMAGE_GUID | + IB_DEVICE_MODIFY_NODE_DESC)) { + err = -EOPNOTSUPP; + rxe_dbg_dev(rxe, "unsupported mask = 0x%x", mask); + goto err_out; + } + + 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; + +err_out: + rxe_err_dev(rxe, "returned err = %d", err); + return err; +} + +static int rxe_modify_port(struct ib_device *ibdev, u32 port_num, + int mask, struct ib_port_modify *attr) +{ + struct rxe_dev *rxe = to_rdev(ibdev); + struct rxe_port *port; + int err; + + if (port_num != 1) { + err = -EINVAL; + rxe_dbg_dev(rxe, "bad port_num = %d", port_num); + goto err_out; + } + + //TODO is shutdown useful + if (mask & ~(IB_PORT_RESET_QKEY_CNTR)) { + err = -EOPNOTSUPP; + rxe_dbg_dev(rxe, "unsupported mask = 0x%x", mask); + goto err_out; + } + + 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; + +err_out: + rxe_err_dev(rxe, "returned err = %d", err); + return err; +} + +static enum rdma_link_layer rxe_get_link_layer(struct ib_device *ibdev, + u32 port_num) +{ + struct rxe_dev *rxe = to_rdev(ibdev); + int err; + + if (port_num != 1) { + err = -EINVAL; + rxe_dbg_dev(rxe, "bad port_num = %d", port_num); + goto err_out; + } + + return IB_LINK_LAYER_ETHERNET; + +err_out: + rxe_err_dev(rxe, "returned err = %d", err); + return err; +} + +static int rxe_port_immutable(struct ib_device *ibdev, u32 port_num, + struct ib_port_immutable *immutable) +{ + struct rxe_dev *rxe = to_rdev(ibdev); + struct ib_port_attr attr = {}; + int err; + + if (port_num != 1) { + err = -EINVAL; + rxe_dbg_dev(rxe, "bad port_num = %d", port_num); + goto err_out; + } + + err = ib_query_port(ibdev, port_num, &attr); + if (err) + goto err_out; + + immutable->core_cap_flags = RDMA_CORE_PORT_IBA_ROCE_UDP_ENCAP; + immutable->pkey_tbl_len = attr.pkey_tbl_len; + immutable->gid_tbl_len = attr.gid_tbl_len; + immutable->max_mad_size = IB_MGMT_MAD_SIZE; + + return 0; + +err_out: + rxe_err_dev(rxe, "returned err = %d", err); + return err; +} + +/* uc */ +static int rxe_alloc_ucontext(struct ib_ucontext *ibuc, struct ib_udata *udata) +{ + struct rxe_dev *rxe = to_rdev(ibuc->device); + struct rxe_ucontext *uc = to_ruc(ibuc); + int err; + + err = rxe_add_to_pool(&rxe->uc_pool, uc); + if (err) + rxe_err_dev(rxe, "unable to create uc"); + + return err; +} + +static void rxe_dealloc_ucontext(struct ib_ucontext *ibuc) +{ + struct rxe_ucontext *uc = to_ruc(ibuc); + int err; + + err = rxe_cleanup(uc); + if (err) + rxe_err_uc(uc, "cleanup failed, err = %d", err); +} + +/* pd */ +static int rxe_alloc_pd(struct ib_pd *ibpd, struct ib_udata *udata) +{ + struct rxe_dev *rxe = to_rdev(ibpd->device); + struct rxe_pd *pd = to_rpd(ibpd); + int err; + + err = rxe_add_to_pool(&rxe->pd_pool, pd); + if (err) { + rxe_dbg_dev(rxe, "unable to alloc pd"); + goto err_out; + } + + return 0; + +err_out: + rxe_err_dev(rxe, "returned err = %d", err); + return err; +} + +static int rxe_dealloc_pd(struct ib_pd *ibpd, struct ib_udata *udata) +{ + struct rxe_pd *pd = to_rpd(ibpd); + int err; + + err = rxe_cleanup(pd); + if (err) + rxe_err_pd(pd, "cleanup failed, err = %d", err); + + return 0; +} + +/* ah */ +static int rxe_create_ah(struct ib_ah *ibah, + struct rdma_ah_init_attr *init_attr, + struct ib_udata *udata) +{ + struct rxe_dev *rxe = to_rdev(ibah->device); + struct rxe_ah *ah = to_rah(ibah); + struct rxe_create_ah_resp __user *uresp = NULL; + int err, cleanup_err; + + if (udata) { + /* test if new user provider */ + if (udata->outlen >= sizeof(*uresp)) + uresp = udata->outbuf; + ah->is_user = true; + } else { + ah->is_user = false; + } + + err = rxe_add_to_pool_ah(&rxe->ah_pool, ah, + init_attr->flags & RDMA_CREATE_AH_SLEEPABLE); + if (err) { + rxe_dbg_dev(rxe, "unable to create ah"); + goto err_out; + } + + /* create index > 0 */ + ah->ah_num = ah->elem.index; + + err = rxe_ah_chk_attr(ah, init_attr->ah_attr); + if (err) { + rxe_dbg_ah(ah, "bad attr"); + goto err_cleanup; + } + + if (uresp) { + /* only if new user provider */ + err = copy_to_user(&uresp->ah_num, &ah->ah_num, + sizeof(uresp->ah_num)); + if (err) { + err = -EFAULT; + rxe_dbg_ah(ah, "unable to copy to user"); + goto err_cleanup; + } + } else if (ah->is_user) { + /* only if old user provider */ + ah->ah_num = 0; + } + + rxe_init_av(init_attr->ah_attr, &ah->av); + rxe_finalize(ah); + + return 0; + +err_cleanup: + cleanup_err = rxe_cleanup(ah); + if (cleanup_err) + rxe_err_ah(ah, "cleanup failed, err = %d", cleanup_err); +err_out: + rxe_err_ah(ah, "returned err = %d", err); + return err; +} + +static int rxe_modify_ah(struct ib_ah *ibah, struct rdma_ah_attr *attr) +{ + struct rxe_ah *ah = to_rah(ibah); + int err; + + err = rxe_ah_chk_attr(ah, attr); + if (err) { + rxe_dbg_ah(ah, "bad attr"); + goto err_out; + } + + rxe_init_av(attr, &ah->av); + + return 0; + +err_out: + rxe_err_ah(ah, "returned err = %d", err); + return err; +} + +static int rxe_query_ah(struct ib_ah *ibah, struct rdma_ah_attr *attr) +{ + struct rxe_ah *ah = to_rah(ibah); + + memset(attr, 0, sizeof(*attr)); + attr->type = ibah->type; + rxe_av_to_attr(&ah->av, attr); + + return 0; +} + +static int rxe_destroy_ah(struct ib_ah *ibah, u32 flags) +{ + struct rxe_ah *ah = to_rah(ibah); + int err; + + err = rxe_cleanup_ah(ah, flags & RDMA_DESTROY_AH_SLEEPABLE); + if (err) + rxe_err_ah(ah, "cleanup failed, err = %d", err); + + return 0; +} + +/* srq */ +static int rxe_create_srq(struct ib_srq *ibsrq, struct ib_srq_init_attr *init, + struct ib_udata *udata) +{ + struct rxe_dev *rxe = to_rdev(ibsrq->device); + struct rxe_pd *pd = to_rpd(ibsrq->pd); + struct rxe_srq *srq = to_rsrq(ibsrq); + struct rxe_create_srq_resp __user *uresp = NULL; + int err, cleanup_err; + + if (udata) { + if (udata->outlen < sizeof(*uresp)) { + err = -EINVAL; + rxe_err_dev(rxe, "malformed udata"); + goto err_out; + } + uresp = udata->outbuf; + } + + if (init->srq_type != IB_SRQT_BASIC) { + err = -EOPNOTSUPP; + rxe_dbg_dev(rxe, "srq type = %d, not supported", + init->srq_type); + goto err_out; + } + + err = rxe_srq_chk_init(rxe, init); + if (err) { + rxe_dbg_dev(rxe, "invalid init attributes"); + goto err_out; + } + + err = rxe_add_to_pool(&rxe->srq_pool, srq); + if (err) { + rxe_dbg_dev(rxe, "unable to create srq, err = %d", err); + goto err_out; + } + + rxe_get(pd); + srq->pd = pd; + + err = rxe_srq_from_init(rxe, srq, init, udata, uresp); + if (err) { + rxe_dbg_srq(srq, "create srq failed, err = %d", err); + goto err_cleanup; + } + + return 0; + +err_cleanup: + cleanup_err = rxe_cleanup(srq); + if (cleanup_err) + rxe_err_srq(srq, "cleanup failed, err = %d", cleanup_err); +err_out: + rxe_err_dev(rxe, "returned err = %d", err); + return 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) +{ + struct rxe_srq *srq = to_rsrq(ibsrq); + struct rxe_dev *rxe = to_rdev(ibsrq->device); + struct rxe_modify_srq_cmd cmd = {}; + int err; + + if (udata) { + if (udata->inlen < sizeof(cmd)) { + err = -EINVAL; + rxe_dbg_srq(srq, "malformed udata"); + goto err_out; + } + + err = ib_copy_from_udata(&cmd, udata, sizeof(cmd)); + if (err) { + err = -EFAULT; + rxe_dbg_srq(srq, "unable to read udata"); + goto err_out; + } + } + + err = rxe_srq_chk_attr(rxe, srq, attr, mask); + if (err) { + rxe_dbg_srq(srq, "bad init attributes"); + goto err_out; + } + + err = rxe_srq_from_attr(rxe, srq, attr, mask, &cmd, udata); + if (err) { + rxe_dbg_srq(srq, "bad attr"); + goto err_out; + } + + return 0; + +err_out: + rxe_err_srq(srq, "returned err = %d", err); + return err; +} + +static int rxe_query_srq(struct ib_srq *ibsrq, struct ib_srq_attr *attr) +{ + struct rxe_srq *srq = to_rsrq(ibsrq); + int err; + + if (srq->error) { + err = -EINVAL; + rxe_dbg_srq(srq, "srq in error state"); + goto err_out; + } + + attr->max_wr = srq->rq.queue->buf->index_mask; + attr->max_sge = srq->rq.max_sge; + attr->srq_limit = srq->limit; + return 0; + +err_out: + rxe_err_srq(srq, "returned err = %d", err); + return err; +} + +static int rxe_post_srq_recv(struct ib_srq *ibsrq, const struct ib_recv_wr *wr, + const struct ib_recv_wr **bad_wr) +{ + int err = 0; + struct rxe_srq *srq = to_rsrq(ibsrq); + unsigned long flags; + + 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; + rxe_err_srq(srq, "returned err = %d", err); + } + + return err; +} + +static int rxe_destroy_srq(struct ib_srq *ibsrq, struct ib_udata *udata) +{ + struct rxe_srq *srq = to_rsrq(ibsrq); + int err; + + err = rxe_cleanup(srq); + if (err) + rxe_err_srq(srq, "cleanup failed, err = %d", err); + + return 0; +} + +/* qp */ +static int rxe_create_qp(struct ib_qp *ibqp, struct ib_qp_init_attr *init, + struct ib_udata *udata) +{ + struct rxe_dev *rxe = to_rdev(ibqp->device); + struct rxe_pd *pd = to_rpd(ibqp->pd); + struct rxe_qp *qp = to_rqp(ibqp); + struct rxe_create_qp_resp __user *uresp = NULL; + int err, cleanup_err; + + if (udata) { + if (udata->inlen) { + err = -EINVAL; + rxe_dbg_dev(rxe, "malformed udata, err = %d", err); + goto err_out; + } + + if (udata->outlen < sizeof(*uresp)) { + err = -EINVAL; + rxe_dbg_dev(rxe, "malformed udata, err = %d", err); + goto err_out; + } + + qp->is_user = true; + uresp = udata->outbuf; + } else { + qp->is_user = false; + } + + if (init->create_flags) { + err = -EOPNOTSUPP; + rxe_dbg_dev(rxe, "unsupported create_flags, err = %d", err); + goto err_out; + } + + err = rxe_qp_chk_init(rxe, init); + if (err) { + rxe_dbg_dev(rxe, "bad init attr, err = %d", err); + goto err_out; + } + + err = rxe_add_to_pool(&rxe->qp_pool, qp); + if (err) { + rxe_dbg_dev(rxe, "unable to create qp, err = %d", err); + goto err_out; + } + + err = rxe_qp_from_init(rxe, qp, pd, init, uresp, ibqp->pd, udata); + if (err) { + rxe_dbg_qp(qp, "create qp failed, err = %d", err); + goto err_cleanup; + } + + rxe_finalize(qp); + return 0; + +err_cleanup: + cleanup_err = rxe_cleanup(qp); + if (cleanup_err) + rxe_err_qp(qp, "cleanup failed, err = %d", cleanup_err); +err_out: + rxe_err_dev(rxe, "returned err = %d", err); + return err; +} + +static int rxe_modify_qp(struct ib_qp *ibqp, struct ib_qp_attr *attr, + int mask, struct ib_udata *udata) +{ + struct rxe_dev *rxe = to_rdev(ibqp->device); + struct rxe_qp *qp = to_rqp(ibqp); + int err; + + if (mask & ~IB_QP_ATTR_STANDARD_BITS) { + err = -EOPNOTSUPP; + rxe_dbg_qp(qp, "unsupported mask = 0x%x, err = %d", + mask, err); + goto err_out; + } + + err = rxe_qp_chk_attr(rxe, qp, attr, mask); + if (err) { + rxe_dbg_qp(qp, "bad mask/attr, err = %d", err); + goto err_out; + } + + err = rxe_qp_from_attr(qp, attr, mask, udata); + if (err) { + rxe_dbg_qp(qp, "modify qp failed, err = %d", err); + goto err_out; + } + + if ((mask & IB_QP_AV) && (attr->ah_attr.ah_flags & IB_AH_GRH)) + qp->src_port = rdma_get_udp_sport(attr->ah_attr.grh.flow_label, + qp->ibqp.qp_num, + qp->attr.dest_qp_num); + + return 0; + +err_out: + rxe_err_qp(qp, "returned err = %d", err); + 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 ib_udata *udata) +{ + struct rxe_qp *qp = to_rqp(ibqp); + int err; + + err = rxe_qp_chk_destroy(qp); + if (err) { + rxe_dbg_qp(qp, "unable to destroy qp, err = %d", err); + goto err_out; + } + + err = rxe_cleanup(qp); + if (err) + rxe_err_qp(qp, "cleanup failed, err = %d", err); + + return 0; + +err_out: + rxe_err_qp(qp, "returned err = %d", err); + return err; +} + +/* send wr */ + +/* sanity check incoming send work request */ +static int validate_send_wr(struct rxe_qp *qp, const struct ib_send_wr *ibwr, + unsigned int *maskp, unsigned int *lengthp) +{ + int num_sge = ibwr->num_sge; + struct rxe_sq *sq = &qp->sq; + unsigned int mask = 0; + unsigned long length = 0; + int err = -EINVAL; + int i; + + do { + mask = wr_opcode_mask(ibwr->opcode, qp); + if (!mask) { + rxe_err_qp(qp, "bad wr opcode for qp type"); + break; + } + + if (num_sge > sq->max_sge) { + rxe_err_qp(qp, "num_sge > max_sge"); + break; + } + + length = 0; + for (i = 0; i < ibwr->num_sge; i++) + length += ibwr->sg_list[i].length; + + if (length > (1UL << 31)) { + rxe_err_qp(qp, "message length too long"); + break; + } + + if (mask & WR_ATOMIC_MASK) { + if (length != 8) { + rxe_err_qp(qp, "atomic length != 8"); + break; + } + if (atomic_wr(ibwr)->remote_addr & 0x7) { + rxe_err_qp(qp, "misaligned atomic address"); + break; + } + } + if (ibwr->send_flags & IB_SEND_INLINE) { + if (!(mask & WR_INLINE_MASK)) { + rxe_err_qp(qp, "opcode doesn't support inline data"); + break; + } + if (length > sq->max_inline) { + rxe_err_qp(qp, "inline length too big"); + break; + } + } + + err = 0; + } while (0); + + *maskp = mask; + *lengthp = (int)length; + + return err; +} + +static int init_send_wr(struct rxe_qp *qp, struct rxe_send_wr *wr, + const struct ib_send_wr *ibwr) +{ + wr->wr_id = ibwr->wr_id; + wr->opcode = ibwr->opcode; + wr->send_flags = ibwr->send_flags; + + if (qp_type(qp) == IB_QPT_UD || + qp_type(qp) == IB_QPT_GSI) { + struct ib_ah *ibah = ud_wr(ibwr)->ah; + + wr->wr.ud.remote_qpn = ud_wr(ibwr)->remote_qpn; + wr->wr.ud.remote_qkey = ud_wr(ibwr)->remote_qkey; + wr->wr.ud.ah_num = to_rah(ibah)->ah_num; + if (qp_type(qp) == IB_QPT_GSI) + wr->wr.ud.pkey_index = ud_wr(ibwr)->pkey_index; + + switch (wr->opcode) { + case IB_WR_SEND_WITH_IMM: + wr->ex.imm_data = ibwr->ex.imm_data; + break; + case IB_WR_SEND: + break; + default: + rxe_err_qp(qp, "bad wr opcode %d for UD/GSI QP", + wr->opcode); + return -EINVAL; + } + } else { + switch (wr->opcode) { + case IB_WR_RDMA_WRITE_WITH_IMM: + wr->ex.imm_data = ibwr->ex.imm_data; + fallthrough; + 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_RDMA_READ_WITH_INV: + wr->ex.invalidate_rkey = ibwr->ex.invalidate_rkey; + wr->wr.rdma.remote_addr = rdma_wr(ibwr)->remote_addr; + wr->wr.rdma.rkey = rdma_wr(ibwr)->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; + case IB_WR_SEND: + case IB_WR_BIND_MW: + case IB_WR_FLUSH: + case IB_WR_ATOMIC_WRITE: + break; + default: + rxe_err_qp(qp, "unsupported wr opcode %d", + wr->opcode); + return -EINVAL; + } + } + + return 0; +} + +static void copy_inline_data_to_wqe(struct rxe_send_wqe *wqe, + const struct ib_send_wr *ibwr) +{ + struct ib_sge *sge = ibwr->sg_list; + u8 *p = wqe->dma.inline_data; + int i; + + for (i = 0; i < ibwr->num_sge; i++, sge++) { + memcpy(p, ib_virt_dma_to_page(sge->addr), sge->length); + p += sge->length; + } +} + +static int init_send_wqe(struct rxe_qp *qp, const struct ib_send_wr *ibwr, + unsigned int mask, unsigned int length, + struct rxe_send_wqe *wqe) +{ + int num_sge = ibwr->num_sge; + int err; + + err = init_send_wr(qp, &wqe->wr, ibwr); + if (err) + return err; + + /* local operation */ + if (unlikely(mask & WR_LOCAL_OP_MASK)) { + wqe->mask = mask; + wqe->state = wqe_state_posted; + return 0; + } + + if (unlikely(ibwr->send_flags & IB_SEND_INLINE)) + copy_inline_data_to_wqe(wqe, ibwr); + 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 : + mask & WR_READ_OR_WRITE_MASK ? rdma_wr(ibwr)->remote_addr : 0; + 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, const struct ib_send_wr *ibwr) +{ + int err; + struct rxe_sq *sq = &qp->sq; + struct rxe_send_wqe *send_wqe; + unsigned int mask; + unsigned int length; + int full; + + err = validate_send_wr(qp, ibwr, &mask, &length); + if (err) + return err; + + full = queue_full(sq->queue, QUEUE_TYPE_FROM_ULP); + if (unlikely(full)) { + rxe_err_qp(qp, "send queue full"); + return -ENOMEM; + } + + send_wqe = queue_producer_addr(sq->queue, QUEUE_TYPE_FROM_ULP); + err = init_send_wqe(qp, ibwr, mask, length, send_wqe); + if (!err) + queue_advance_producer(sq->queue, QUEUE_TYPE_FROM_ULP); + + return err; +} + +static int rxe_post_send_kernel(struct rxe_qp *qp, + const struct ib_send_wr *ibwr, + const struct ib_send_wr **bad_wr) +{ + int err = 0; + unsigned long flags; + + spin_lock_irqsave(&qp->sq.sq_lock, flags); + while (ibwr) { + err = post_one_send(qp, ibwr); + if (err) { + *bad_wr = ibwr; + break; + } + ibwr = ibwr->next; + } + spin_unlock_irqrestore(&qp->sq.sq_lock, flags); + + if (!err) + rxe_sched_task(&qp->req.task); + + spin_lock_irqsave(&qp->state_lock, flags); + if (qp_state(qp) == IB_QPS_ERR) + rxe_sched_task(&qp->comp.task); + spin_unlock_irqrestore(&qp->state_lock, flags); + + return err; +} + +static int rxe_post_send(struct ib_qp *ibqp, const struct ib_send_wr *wr, + const struct ib_send_wr **bad_wr) +{ + struct rxe_qp *qp = to_rqp(ibqp); + int err; + unsigned long flags; + + spin_lock_irqsave(&qp->state_lock, flags); + /* caller has already called destroy_qp */ + if (WARN_ON_ONCE(!qp->valid)) { + spin_unlock_irqrestore(&qp->state_lock, flags); + rxe_err_qp(qp, "qp has been destroyed"); + return -EINVAL; + } + + if (unlikely(qp_state(qp) < IB_QPS_RTS)) { + spin_unlock_irqrestore(&qp->state_lock, flags); + *bad_wr = wr; + rxe_err_qp(qp, "qp not ready to send"); + return -EINVAL; + } + spin_unlock_irqrestore(&qp->state_lock, flags); + + if (qp->is_user) { + /* Utilize process context to do protocol processing */ + rxe_run_task(&qp->req.task); + } else { + err = rxe_post_send_kernel(qp, wr, bad_wr); + if (err) + return err; + } + + return 0; +} + +/* recv wr */ +static int post_one_recv(struct rxe_rq *rq, const struct ib_recv_wr *ibwr) +{ + int i; + unsigned long length; + struct rxe_recv_wqe *recv_wqe; + int num_sge = ibwr->num_sge; + int full; + int err; + + full = queue_full(rq->queue, QUEUE_TYPE_FROM_ULP); + if (unlikely(full)) { + err = -ENOMEM; + rxe_dbg("queue full"); + goto err_out; + } + + if (unlikely(num_sge > rq->max_sge)) { + err = -EINVAL; + rxe_dbg("bad num_sge > max_sge"); + goto err_out; + } + + length = 0; + for (i = 0; i < num_sge; i++) + length += ibwr->sg_list[i].length; + + /* IBA max message size is 2^31 */ + if (length >= (1UL<<31)) { + err = -EINVAL; + rxe_dbg("message length too long"); + goto err_out; + } + + recv_wqe = queue_producer_addr(rq->queue, QUEUE_TYPE_FROM_ULP); + + recv_wqe->wr_id = ibwr->wr_id; + 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; + memcpy(recv_wqe->dma.sge, ibwr->sg_list, + num_sge * sizeof(struct ib_sge)); + + queue_advance_producer(rq->queue, QUEUE_TYPE_FROM_ULP); + + return 0; + +err_out: + rxe_dbg("returned err = %d", err); + return err; +} + +static int rxe_post_recv(struct ib_qp *ibqp, const struct ib_recv_wr *wr, + const 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; + + spin_lock_irqsave(&qp->state_lock, flags); + /* caller has already called destroy_qp */ + if (WARN_ON_ONCE(!qp->valid)) { + spin_unlock_irqrestore(&qp->state_lock, flags); + rxe_err_qp(qp, "qp has been destroyed"); + return -EINVAL; + } + + /* see C10-97.2.1 */ + if (unlikely((qp_state(qp) < IB_QPS_INIT))) { + spin_unlock_irqrestore(&qp->state_lock, flags); + *bad_wr = wr; + rxe_dbg_qp(qp, "qp not ready to post recv"); + return -EINVAL; + } + spin_unlock_irqrestore(&qp->state_lock, flags); + + if (unlikely(qp->srq)) { + *bad_wr = wr; + rxe_dbg_qp(qp, "qp has srq, use post_srq_recv instead"); + return -EINVAL; + } + + 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); + + spin_lock_irqsave(&qp->state_lock, flags); + if (qp_state(qp) == IB_QPS_ERR) + rxe_sched_task(&qp->resp.task); + spin_unlock_irqrestore(&qp->state_lock, flags); + + return err; +} + +/* cq */ +static int rxe_create_cq(struct ib_cq *ibcq, const struct ib_cq_init_attr *attr, + struct ib_udata *udata) +{ + struct ib_device *dev = ibcq->device; + struct rxe_dev *rxe = to_rdev(dev); + struct rxe_cq *cq = to_rcq(ibcq); + struct rxe_create_cq_resp __user *uresp = NULL; + int err, cleanup_err; + + if (udata) { + if (udata->outlen < sizeof(*uresp)) { + err = -EINVAL; + rxe_dbg_dev(rxe, "malformed udata, err = %d", err); + goto err_out; + } + uresp = udata->outbuf; + } + + if (attr->flags) { + err = -EOPNOTSUPP; + rxe_dbg_dev(rxe, "bad attr->flags, err = %d", err); + goto err_out; + } + + err = rxe_cq_chk_attr(rxe, NULL, attr->cqe, attr->comp_vector); + if (err) { + rxe_dbg_dev(rxe, "bad init attributes, err = %d", err); + goto err_out; + } + + err = rxe_add_to_pool(&rxe->cq_pool, cq); + if (err) { + rxe_dbg_dev(rxe, "unable to create cq, err = %d", err); + goto err_out; + } + + err = rxe_cq_from_init(rxe, cq, attr->cqe, attr->comp_vector, udata, + uresp); + if (err) { + rxe_dbg_cq(cq, "create cq failed, err = %d", err); + goto err_cleanup; + } + + return 0; + +err_cleanup: + cleanup_err = rxe_cleanup(cq); + if (cleanup_err) + rxe_err_cq(cq, "cleanup failed, err = %d", cleanup_err); +err_out: + rxe_err_dev(rxe, "returned err = %d", err); + return err; +} + +static int rxe_resize_cq(struct ib_cq *ibcq, int cqe, struct ib_udata *udata) +{ + struct rxe_cq *cq = to_rcq(ibcq); + struct rxe_dev *rxe = to_rdev(ibcq->device); + struct rxe_resize_cq_resp __user *uresp = NULL; + int err; + + if (udata) { + if (udata->outlen < sizeof(*uresp)) { + err = -EINVAL; + rxe_dbg_cq(cq, "malformed udata"); + goto err_out; + } + uresp = udata->outbuf; + } + + err = rxe_cq_chk_attr(rxe, cq, cqe, 0); + if (err) { + rxe_dbg_cq(cq, "bad attr, err = %d", err); + goto err_out; + } + + err = rxe_cq_resize_queue(cq, cqe, uresp, udata); + if (err) { + rxe_dbg_cq(cq, "resize cq failed, err = %d", err); + goto err_out; + } + + return 0; + +err_out: + rxe_err_cq(cq, "returned err = %d", err); + 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, QUEUE_TYPE_TO_ULP); + if (!cqe) + break; /* queue empty */ + + memcpy(wc++, &cqe->ibwc, sizeof(*wc)); + queue_advance_consumer(cq->queue, QUEUE_TYPE_TO_ULP); + } + 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; + + count = queue_count(cq->queue, QUEUE_TYPE_TO_ULP); + + 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); + int ret = 0; + int empty; + unsigned long irq_flags; + + spin_lock_irqsave(&cq->cq_lock, irq_flags); + cq->notify |= flags & IB_CQ_SOLICITED_MASK; + empty = queue_empty(cq->queue, QUEUE_TYPE_TO_ULP); + + if ((flags & IB_CQ_REPORT_MISSED_EVENTS) && !empty) + ret = 1; + + spin_unlock_irqrestore(&cq->cq_lock, irq_flags); + + return ret; +} + +static int rxe_destroy_cq(struct ib_cq *ibcq, struct ib_udata *udata) +{ + struct rxe_cq *cq = to_rcq(ibcq); + int err; + + /* See IBA C11-17: The CI shall return an error if this Verb is + * invoked while a Work Queue is still associated with the CQ. + */ + if (atomic_read(&cq->num_wq)) { + err = -EINVAL; + rxe_dbg_cq(cq, "still in use"); + goto err_out; + } + + err = rxe_cleanup(cq); + if (err) + rxe_err_cq(cq, "cleanup failed, err = %d", err); + + return 0; + +err_out: + rxe_err_cq(cq, "returned err = %d", err); + return err; +} + +/* mr */ +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_mr *mr; + int err; + + mr = kzalloc(sizeof(*mr), GFP_KERNEL); + if (!mr) + return ERR_PTR(-ENOMEM); + + err = rxe_add_to_pool(&rxe->mr_pool, mr); + if (err) { + rxe_dbg_dev(rxe, "unable to create mr"); + goto err_free; + } + + rxe_get(pd); + mr->ibmr.pd = ibpd; + mr->ibmr.device = ibpd->device; + + rxe_mr_init_dma(access, mr); + rxe_finalize(mr); + return &mr->ibmr; + +err_free: + kfree(mr); + rxe_err_pd(pd, "returned err = %d", err); + 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) +{ + struct rxe_dev *rxe = to_rdev(ibpd->device); + struct rxe_pd *pd = to_rpd(ibpd); + struct rxe_mr *mr; + int err, cleanup_err; + + if (access & ~RXE_ACCESS_SUPPORTED_MR) { + rxe_err_pd(pd, "access = %#x not supported (%#x)", access, + RXE_ACCESS_SUPPORTED_MR); + return ERR_PTR(-EOPNOTSUPP); + } + + mr = kzalloc(sizeof(*mr), GFP_KERNEL); + if (!mr) + return ERR_PTR(-ENOMEM); + + err = rxe_add_to_pool(&rxe->mr_pool, mr); + if (err) { + rxe_dbg_pd(pd, "unable to create mr"); + goto err_free; + } + + rxe_get(pd); + mr->ibmr.pd = ibpd; + mr->ibmr.device = ibpd->device; + + err = rxe_mr_init_user(rxe, start, length, iova, access, mr); + if (err) { + rxe_dbg_mr(mr, "reg_user_mr failed, err = %d", err); + goto err_cleanup; + } + + rxe_finalize(mr); + return &mr->ibmr; + +err_cleanup: + cleanup_err = rxe_cleanup(mr); + if (cleanup_err) + rxe_err_mr(mr, "cleanup failed, err = %d", cleanup_err); +err_free: + kfree(mr); + rxe_err_pd(pd, "returned err = %d", err); + return ERR_PTR(err); +} + +static struct ib_mr *rxe_rereg_user_mr(struct ib_mr *ibmr, int flags, + u64 start, u64 length, u64 iova, + int access, struct ib_pd *ibpd, + struct ib_udata *udata) +{ + struct rxe_mr *mr = to_rmr(ibmr); + struct rxe_pd *old_pd = to_rpd(ibmr->pd); + struct rxe_pd *pd = to_rpd(ibpd); + + /* for now only support the two easy cases: + * rereg_pd and rereg_access + */ + if (flags & ~RXE_MR_REREG_SUPPORTED) { + rxe_err_mr(mr, "flags = %#x not supported", flags); + return ERR_PTR(-EOPNOTSUPP); + } + + if (flags & IB_MR_REREG_PD) { + rxe_put(old_pd); + rxe_get(pd); + mr->ibmr.pd = ibpd; + } + + if (flags & IB_MR_REREG_ACCESS) { + if (access & ~RXE_ACCESS_SUPPORTED_MR) { + rxe_err_mr(mr, "access = %#x not supported", access); + return ERR_PTR(-EOPNOTSUPP); + } + mr->access = access; + } + + return NULL; +} + +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_mr *mr; + int err, cleanup_err; + + if (mr_type != IB_MR_TYPE_MEM_REG) { + err = -EINVAL; + rxe_dbg_pd(pd, "mr type %d not supported, err = %d", + mr_type, err); + goto err_out; + } + + mr = kzalloc(sizeof(*mr), GFP_KERNEL); + if (!mr) + return ERR_PTR(-ENOMEM); + + err = rxe_add_to_pool(&rxe->mr_pool, mr); + if (err) + goto err_free; + + rxe_get(pd); + mr->ibmr.pd = ibpd; + mr->ibmr.device = ibpd->device; + + err = rxe_mr_init_fast(max_num_sg, mr); + if (err) { + rxe_dbg_mr(mr, "alloc_mr failed, err = %d", err); + goto err_cleanup; + } + + rxe_finalize(mr); + return &mr->ibmr; + +err_cleanup: + cleanup_err = rxe_cleanup(mr); + if (cleanup_err) + rxe_err_mr(mr, "cleanup failed, err = %d", err); +err_free: + kfree(mr); +err_out: + rxe_err_pd(pd, "returned err = %d", err); + return ERR_PTR(err); +} + +static int rxe_dereg_mr(struct ib_mr *ibmr, struct ib_udata *udata) +{ + struct rxe_mr *mr = to_rmr(ibmr); + int err, cleanup_err; + + /* See IBA 10.6.7.2.6 */ + if (atomic_read(&mr->num_mw) > 0) { + err = -EINVAL; + rxe_dbg_mr(mr, "mr has mw's bound"); + goto err_out; + } + + cleanup_err = rxe_cleanup(mr); + if (cleanup_err) + rxe_err_mr(mr, "cleanup failed, err = %d", cleanup_err); + + kfree_rcu_mightsleep(mr); + return 0; + +err_out: + rxe_err_mr(mr, "returned err = %d", err); + return err; +} + +static ssize_t parent_show(struct device *device, + struct device_attribute *attr, char *buf) +{ + struct rxe_dev *rxe = + rdma_device_to_drv_device(device, struct rxe_dev, ib_dev); + + return sysfs_emit(buf, "%s\n", rxe_parent_name(rxe, 1)); +} + +static DEVICE_ATTR_RO(parent); + +static struct attribute *rxe_dev_attributes[] = { + &dev_attr_parent.attr, + NULL +}; + +static const struct attribute_group rxe_attr_group = { + .attrs = rxe_dev_attributes, +}; + +static int rxe_enable_driver(struct ib_device *ib_dev) +{ + struct rxe_dev *rxe = container_of(ib_dev, struct rxe_dev, ib_dev); + + rxe_set_port_state(rxe); + dev_info(&rxe->ib_dev.dev, "added %s\n", netdev_name(rxe->ndev)); + return 0; +} + +static const struct ib_device_ops rxe_dev_ops = { + .owner = THIS_MODULE, + .driver_id = RDMA_DRIVER_RXE, + .uverbs_abi_ver = RXE_UVERBS_ABI_VERSION, + + .alloc_hw_port_stats = rxe_ib_alloc_hw_port_stats, + .alloc_mr = rxe_alloc_mr, + .alloc_mw = rxe_alloc_mw, + .alloc_pd = rxe_alloc_pd, + .alloc_ucontext = rxe_alloc_ucontext, + .attach_mcast = rxe_attach_mcast, + .create_ah = rxe_create_ah, + .create_cq = rxe_create_cq, + .create_qp = rxe_create_qp, + .create_srq = rxe_create_srq, + .create_user_ah = rxe_create_ah, + .dealloc_driver = rxe_dealloc, + .dealloc_mw = rxe_dealloc_mw, + .dealloc_pd = rxe_dealloc_pd, + .dealloc_ucontext = rxe_dealloc_ucontext, + .dereg_mr = rxe_dereg_mr, + .destroy_ah = rxe_destroy_ah, + .destroy_cq = rxe_destroy_cq, + .destroy_qp = rxe_destroy_qp, + .destroy_srq = rxe_destroy_srq, + .detach_mcast = rxe_detach_mcast, + .device_group = &rxe_attr_group, + .enable_driver = rxe_enable_driver, + .get_dma_mr = rxe_get_dma_mr, + .get_hw_stats = rxe_ib_get_hw_stats, + .get_link_layer = rxe_get_link_layer, + .get_port_immutable = rxe_port_immutable, + .map_mr_sg = rxe_map_mr_sg, + .mmap = rxe_mmap, + .modify_ah = rxe_modify_ah, + .modify_device = rxe_modify_device, + .modify_port = rxe_modify_port, + .modify_qp = rxe_modify_qp, + .modify_srq = rxe_modify_srq, + .peek_cq = rxe_peek_cq, + .poll_cq = rxe_poll_cq, + .post_recv = rxe_post_recv, + .post_send = rxe_post_send, + .post_srq_recv = rxe_post_srq_recv, + .query_ah = rxe_query_ah, + .query_device = rxe_query_device, + .query_pkey = rxe_query_pkey, + .query_port = rxe_query_port, + .query_qp = rxe_query_qp, + .query_srq = rxe_query_srq, + .reg_user_mr = rxe_reg_user_mr, + .req_notify_cq = rxe_req_notify_cq, + .rereg_user_mr = rxe_rereg_user_mr, + .resize_cq = rxe_resize_cq, + + INIT_RDMA_OBJ_SIZE(ib_ah, rxe_ah, ibah), + INIT_RDMA_OBJ_SIZE(ib_cq, rxe_cq, ibcq), + INIT_RDMA_OBJ_SIZE(ib_pd, rxe_pd, ibpd), + INIT_RDMA_OBJ_SIZE(ib_qp, rxe_qp, ibqp), + INIT_RDMA_OBJ_SIZE(ib_srq, rxe_srq, ibsrq), + INIT_RDMA_OBJ_SIZE(ib_ucontext, rxe_ucontext, ibuc), + INIT_RDMA_OBJ_SIZE(ib_mw, rxe_mw, ibmw), +}; + +int rxe_register_device(struct rxe_dev *rxe, const char *ibdev_name) +{ + int err; + struct ib_device *dev = &rxe->ib_dev; + + strscpy(dev->node_desc, "rxe", sizeof(dev->node_desc)); + + dev->node_type = RDMA_NODE_IB_CA; + dev->phys_port_cnt = 1; + dev->num_comp_vectors = num_possible_cpus(); + dev->local_dma_lkey = 0; + addrconf_addr_eui48((unsigned char *)&dev->node_guid, + rxe->ndev->dev_addr); + + dev->uverbs_cmd_mask |= BIT_ULL(IB_USER_VERBS_CMD_POST_SEND) | + BIT_ULL(IB_USER_VERBS_CMD_REQ_NOTIFY_CQ); + + ib_set_device_ops(dev, &rxe_dev_ops); + err = ib_device_set_netdev(&rxe->ib_dev, rxe->ndev, 1); + if (err) + return err; + + err = rxe_icrc_init(rxe); + if (err) + return err; + + err = ib_register_device(dev, ibdev_name, NULL); + if (err) + rxe_dbg_dev(rxe, "failed with error %d\n", err); + + /* + * Note that rxe may be invalid at this point if another thread + * unregistered it. + */ + return err; +} |