diff options
Diffstat (limited to 'drivers/infiniband/hw/vmw_pvrdma/pvrdma_qp.c')
| -rw-r--r-- | drivers/infiniband/hw/vmw_pvrdma/pvrdma_qp.c | 1046 |
1 files changed, 1046 insertions, 0 deletions
diff --git a/drivers/infiniband/hw/vmw_pvrdma/pvrdma_qp.c b/drivers/infiniband/hw/vmw_pvrdma/pvrdma_qp.c new file mode 100644 index 0000000000..98b2a0090b --- /dev/null +++ b/drivers/infiniband/hw/vmw_pvrdma/pvrdma_qp.c @@ -0,0 +1,1046 @@ +/* + * Copyright (c) 2012-2016 VMware, Inc. All rights reserved. + * + * This program is free software; you can redistribute it and/or + * modify it under the terms of EITHER the GNU General Public License + * version 2 as published by the Free Software Foundation or the BSD + * 2-Clause License. This program is distributed in the hope that it + * will be useful, but WITHOUT ANY WARRANTY; WITHOUT EVEN THE IMPLIED + * WARRANTY OF MERCHANTABILITY OR FITNESS FOR A PARTICULAR PURPOSE. + * See the GNU General Public License version 2 for more details at + * http://www.gnu.org/licenses/old-licenses/gpl-2.0.en.html. + * + * You should have received a copy of the GNU General Public License + * along with this program available in the file COPYING in the main + * directory of this source tree. + * + * The BSD 2-Clause License + * + * 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. + * + * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS + * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT + * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS + * FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE + * COPYRIGHT HOLDER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, + * INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES + * (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR + * SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) + * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, + * STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) + * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED + * OF THE POSSIBILITY OF SUCH DAMAGE. + */ + +#include <asm/page.h> +#include <linux/io.h> +#include <linux/wait.h> +#include <rdma/ib_addr.h> +#include <rdma/ib_smi.h> +#include <rdma/ib_user_verbs.h> + +#include "pvrdma.h" + +static void __pvrdma_destroy_qp(struct pvrdma_dev *dev, + struct pvrdma_qp *qp); + +static inline void get_cqs(struct pvrdma_qp *qp, struct pvrdma_cq **send_cq, + struct pvrdma_cq **recv_cq) +{ + *send_cq = to_vcq(qp->ibqp.send_cq); + *recv_cq = to_vcq(qp->ibqp.recv_cq); +} + +static void pvrdma_lock_cqs(struct pvrdma_cq *scq, struct pvrdma_cq *rcq, + unsigned long *scq_flags, + unsigned long *rcq_flags) + __acquires(scq->cq_lock) __acquires(rcq->cq_lock) +{ + if (scq == rcq) { + spin_lock_irqsave(&scq->cq_lock, *scq_flags); + __acquire(rcq->cq_lock); + } else if (scq->cq_handle < rcq->cq_handle) { + spin_lock_irqsave(&scq->cq_lock, *scq_flags); + spin_lock_irqsave_nested(&rcq->cq_lock, *rcq_flags, + SINGLE_DEPTH_NESTING); + } else { + spin_lock_irqsave(&rcq->cq_lock, *rcq_flags); + spin_lock_irqsave_nested(&scq->cq_lock, *scq_flags, + SINGLE_DEPTH_NESTING); + } +} + +static void pvrdma_unlock_cqs(struct pvrdma_cq *scq, struct pvrdma_cq *rcq, + unsigned long *scq_flags, + unsigned long *rcq_flags) + __releases(scq->cq_lock) __releases(rcq->cq_lock) +{ + if (scq == rcq) { + __release(rcq->cq_lock); + spin_unlock_irqrestore(&scq->cq_lock, *scq_flags); + } else if (scq->cq_handle < rcq->cq_handle) { + spin_unlock_irqrestore(&rcq->cq_lock, *rcq_flags); + spin_unlock_irqrestore(&scq->cq_lock, *scq_flags); + } else { + spin_unlock_irqrestore(&scq->cq_lock, *scq_flags); + spin_unlock_irqrestore(&rcq->cq_lock, *rcq_flags); + } +} + +static void pvrdma_reset_qp(struct pvrdma_qp *qp) +{ + struct pvrdma_cq *scq, *rcq; + unsigned long scq_flags, rcq_flags; + + /* Clean up cqes */ + get_cqs(qp, &scq, &rcq); + pvrdma_lock_cqs(scq, rcq, &scq_flags, &rcq_flags); + + _pvrdma_flush_cqe(qp, scq); + if (scq != rcq) + _pvrdma_flush_cqe(qp, rcq); + + pvrdma_unlock_cqs(scq, rcq, &scq_flags, &rcq_flags); + + /* + * Reset queuepair. The checks are because usermode queuepairs won't + * have kernel ringstates. + */ + if (qp->rq.ring) { + atomic_set(&qp->rq.ring->cons_head, 0); + atomic_set(&qp->rq.ring->prod_tail, 0); + } + if (qp->sq.ring) { + atomic_set(&qp->sq.ring->cons_head, 0); + atomic_set(&qp->sq.ring->prod_tail, 0); + } +} + +static int pvrdma_set_rq_size(struct pvrdma_dev *dev, + struct ib_qp_cap *req_cap, + struct pvrdma_qp *qp) +{ + if (req_cap->max_recv_wr > dev->dsr->caps.max_qp_wr || + req_cap->max_recv_sge > dev->dsr->caps.max_sge) { + dev_warn(&dev->pdev->dev, "recv queue size invalid\n"); + return -EINVAL; + } + + qp->rq.wqe_cnt = roundup_pow_of_two(max(1U, req_cap->max_recv_wr)); + qp->rq.max_sg = roundup_pow_of_two(max(1U, req_cap->max_recv_sge)); + + /* Write back */ + req_cap->max_recv_wr = qp->rq.wqe_cnt; + req_cap->max_recv_sge = qp->rq.max_sg; + + qp->rq.wqe_size = roundup_pow_of_two(sizeof(struct pvrdma_rq_wqe_hdr) + + sizeof(struct pvrdma_sge) * + qp->rq.max_sg); + qp->npages_recv = (qp->rq.wqe_cnt * qp->rq.wqe_size + PAGE_SIZE - 1) / + PAGE_SIZE; + + return 0; +} + +static int pvrdma_set_sq_size(struct pvrdma_dev *dev, struct ib_qp_cap *req_cap, + struct pvrdma_qp *qp) +{ + if (req_cap->max_send_wr > dev->dsr->caps.max_qp_wr || + req_cap->max_send_sge > dev->dsr->caps.max_sge) { + dev_warn(&dev->pdev->dev, "send queue size invalid\n"); + return -EINVAL; + } + + qp->sq.wqe_cnt = roundup_pow_of_two(max(1U, req_cap->max_send_wr)); + qp->sq.max_sg = roundup_pow_of_two(max(1U, req_cap->max_send_sge)); + + /* Write back */ + req_cap->max_send_wr = qp->sq.wqe_cnt; + req_cap->max_send_sge = qp->sq.max_sg; + + qp->sq.wqe_size = roundup_pow_of_two(sizeof(struct pvrdma_sq_wqe_hdr) + + sizeof(struct pvrdma_sge) * + qp->sq.max_sg); + /* Note: one extra page for the header. */ + qp->npages_send = PVRDMA_QP_NUM_HEADER_PAGES + + (qp->sq.wqe_cnt * qp->sq.wqe_size + PAGE_SIZE - 1) / + PAGE_SIZE; + + return 0; +} + +/** + * pvrdma_create_qp - create queue pair + * @ibqp: queue pair + * @init_attr: queue pair attributes + * @udata: user data + * + * @return: the 0 on success, otherwise returns an errno. + */ +int pvrdma_create_qp(struct ib_qp *ibqp, struct ib_qp_init_attr *init_attr, + struct ib_udata *udata) +{ + struct pvrdma_qp *qp = to_vqp(ibqp); + struct pvrdma_dev *dev = to_vdev(ibqp->device); + union pvrdma_cmd_req req; + union pvrdma_cmd_resp rsp; + struct pvrdma_cmd_create_qp *cmd = &req.create_qp; + struct pvrdma_cmd_create_qp_resp *resp = &rsp.create_qp_resp; + struct pvrdma_cmd_create_qp_resp_v2 *resp_v2 = &rsp.create_qp_resp_v2; + struct pvrdma_create_qp ucmd; + struct pvrdma_create_qp_resp qp_resp = {}; + unsigned long flags; + int ret; + bool is_srq = !!init_attr->srq; + + if (init_attr->create_flags) { + dev_warn(&dev->pdev->dev, + "invalid create queuepair flags %#x\n", + init_attr->create_flags); + return -EOPNOTSUPP; + } + + if (init_attr->qp_type != IB_QPT_RC && + init_attr->qp_type != IB_QPT_UD && + init_attr->qp_type != IB_QPT_GSI) { + dev_warn(&dev->pdev->dev, "queuepair type %d not supported\n", + init_attr->qp_type); + return -EOPNOTSUPP; + } + + if (is_srq && !dev->dsr->caps.max_srq) { + dev_warn(&dev->pdev->dev, + "SRQs not supported by device\n"); + return -EINVAL; + } + + if (!atomic_add_unless(&dev->num_qps, 1, dev->dsr->caps.max_qp)) + return -ENOMEM; + + switch (init_attr->qp_type) { + case IB_QPT_GSI: + if (init_attr->port_num == 0 || + init_attr->port_num > ibqp->device->phys_port_cnt) { + dev_warn(&dev->pdev->dev, "invalid queuepair attrs\n"); + ret = -EINVAL; + goto err_qp; + } + fallthrough; + case IB_QPT_RC: + case IB_QPT_UD: + spin_lock_init(&qp->sq.lock); + spin_lock_init(&qp->rq.lock); + mutex_init(&qp->mutex); + refcount_set(&qp->refcnt, 1); + init_completion(&qp->free); + + qp->state = IB_QPS_RESET; + qp->is_kernel = !udata; + + if (!qp->is_kernel) { + dev_dbg(&dev->pdev->dev, + "create queuepair from user space\n"); + + if (ib_copy_from_udata(&ucmd, udata, sizeof(ucmd))) { + ret = -EFAULT; + goto err_qp; + } + + /* Userspace supports qpn and qp handles? */ + if (dev->dsr_version >= PVRDMA_QPHANDLE_VERSION && + udata->outlen < sizeof(qp_resp)) { + dev_warn(&dev->pdev->dev, + "create queuepair not supported\n"); + ret = -EOPNOTSUPP; + goto err_qp; + } + + if (!is_srq) { + /* set qp->sq.wqe_cnt, shift, buf_size.. */ + qp->rumem = ib_umem_get(ibqp->device, + ucmd.rbuf_addr, + ucmd.rbuf_size, 0); + if (IS_ERR(qp->rumem)) { + ret = PTR_ERR(qp->rumem); + goto err_qp; + } + qp->srq = NULL; + } else { + qp->rumem = NULL; + qp->srq = to_vsrq(init_attr->srq); + } + + qp->sumem = ib_umem_get(ibqp->device, ucmd.sbuf_addr, + ucmd.sbuf_size, 0); + if (IS_ERR(qp->sumem)) { + if (!is_srq) + ib_umem_release(qp->rumem); + ret = PTR_ERR(qp->sumem); + goto err_qp; + } + + qp->npages_send = + ib_umem_num_dma_blocks(qp->sumem, PAGE_SIZE); + if (!is_srq) + qp->npages_recv = ib_umem_num_dma_blocks( + qp->rumem, PAGE_SIZE); + else + qp->npages_recv = 0; + qp->npages = qp->npages_send + qp->npages_recv; + } else { + ret = pvrdma_set_sq_size(to_vdev(ibqp->device), + &init_attr->cap, qp); + if (ret) + goto err_qp; + + ret = pvrdma_set_rq_size(to_vdev(ibqp->device), + &init_attr->cap, qp); + if (ret) + goto err_qp; + + qp->npages = qp->npages_send + qp->npages_recv; + + /* Skip header page. */ + qp->sq.offset = PVRDMA_QP_NUM_HEADER_PAGES * PAGE_SIZE; + + /* Recv queue pages are after send pages. */ + qp->rq.offset = qp->npages_send * PAGE_SIZE; + } + + if (qp->npages < 0 || qp->npages > PVRDMA_PAGE_DIR_MAX_PAGES) { + dev_warn(&dev->pdev->dev, + "overflow pages in queuepair\n"); + ret = -EINVAL; + goto err_umem; + } + + ret = pvrdma_page_dir_init(dev, &qp->pdir, qp->npages, + qp->is_kernel); + if (ret) { + dev_warn(&dev->pdev->dev, + "could not allocate page directory\n"); + goto err_umem; + } + + if (!qp->is_kernel) { + pvrdma_page_dir_insert_umem(&qp->pdir, qp->sumem, 0); + if (!is_srq) + pvrdma_page_dir_insert_umem(&qp->pdir, + qp->rumem, + qp->npages_send); + } else { + /* Ring state is always the first page. */ + qp->sq.ring = qp->pdir.pages[0]; + qp->rq.ring = is_srq ? NULL : &qp->sq.ring[1]; + } + break; + default: + ret = -EINVAL; + goto err_qp; + } + + /* Not supported */ + init_attr->cap.max_inline_data = 0; + + memset(cmd, 0, sizeof(*cmd)); + cmd->hdr.cmd = PVRDMA_CMD_CREATE_QP; + cmd->pd_handle = to_vpd(ibqp->pd)->pd_handle; + cmd->send_cq_handle = to_vcq(init_attr->send_cq)->cq_handle; + cmd->recv_cq_handle = to_vcq(init_attr->recv_cq)->cq_handle; + if (is_srq) + cmd->srq_handle = to_vsrq(init_attr->srq)->srq_handle; + else + cmd->srq_handle = 0; + cmd->max_send_wr = init_attr->cap.max_send_wr; + cmd->max_recv_wr = init_attr->cap.max_recv_wr; + cmd->max_send_sge = init_attr->cap.max_send_sge; + cmd->max_recv_sge = init_attr->cap.max_recv_sge; + cmd->max_inline_data = init_attr->cap.max_inline_data; + cmd->sq_sig_all = (init_attr->sq_sig_type == IB_SIGNAL_ALL_WR) ? 1 : 0; + cmd->qp_type = ib_qp_type_to_pvrdma(init_attr->qp_type); + cmd->is_srq = is_srq; + cmd->lkey = 0; + cmd->access_flags = IB_ACCESS_LOCAL_WRITE; + cmd->total_chunks = qp->npages; + cmd->send_chunks = qp->npages_send - PVRDMA_QP_NUM_HEADER_PAGES; + cmd->pdir_dma = qp->pdir.dir_dma; + + dev_dbg(&dev->pdev->dev, "create queuepair with %d, %d, %d, %d\n", + cmd->max_send_wr, cmd->max_recv_wr, cmd->max_send_sge, + cmd->max_recv_sge); + + ret = pvrdma_cmd_post(dev, &req, &rsp, PVRDMA_CMD_CREATE_QP_RESP); + if (ret < 0) { + dev_warn(&dev->pdev->dev, + "could not create queuepair, error: %d\n", ret); + goto err_pdir; + } + + /* max_send_wr/_recv_wr/_send_sge/_recv_sge/_inline_data */ + qp->port = init_attr->port_num; + + if (dev->dsr_version >= PVRDMA_QPHANDLE_VERSION) { + qp->ibqp.qp_num = resp_v2->qpn; + qp->qp_handle = resp_v2->qp_handle; + } else { + qp->ibqp.qp_num = resp->qpn; + qp->qp_handle = resp->qpn; + } + + spin_lock_irqsave(&dev->qp_tbl_lock, flags); + dev->qp_tbl[qp->qp_handle % dev->dsr->caps.max_qp] = qp; + spin_unlock_irqrestore(&dev->qp_tbl_lock, flags); + + if (udata) { + qp_resp.qpn = qp->ibqp.qp_num; + qp_resp.qp_handle = qp->qp_handle; + + if (ib_copy_to_udata(udata, &qp_resp, + min(udata->outlen, sizeof(qp_resp)))) { + dev_warn(&dev->pdev->dev, + "failed to copy back udata\n"); + __pvrdma_destroy_qp(dev, qp); + return -EINVAL; + } + } + + return 0; + +err_pdir: + pvrdma_page_dir_cleanup(dev, &qp->pdir); +err_umem: + ib_umem_release(qp->rumem); + ib_umem_release(qp->sumem); +err_qp: + atomic_dec(&dev->num_qps); + return ret; +} + +static void _pvrdma_free_qp(struct pvrdma_qp *qp) +{ + unsigned long flags; + struct pvrdma_dev *dev = to_vdev(qp->ibqp.device); + + spin_lock_irqsave(&dev->qp_tbl_lock, flags); + dev->qp_tbl[qp->qp_handle] = NULL; + spin_unlock_irqrestore(&dev->qp_tbl_lock, flags); + + if (refcount_dec_and_test(&qp->refcnt)) + complete(&qp->free); + wait_for_completion(&qp->free); + + ib_umem_release(qp->rumem); + ib_umem_release(qp->sumem); + + pvrdma_page_dir_cleanup(dev, &qp->pdir); + + atomic_dec(&dev->num_qps); +} + +static void pvrdma_free_qp(struct pvrdma_qp *qp) +{ + struct pvrdma_cq *scq; + struct pvrdma_cq *rcq; + unsigned long scq_flags, rcq_flags; + + /* In case cq is polling */ + get_cqs(qp, &scq, &rcq); + pvrdma_lock_cqs(scq, rcq, &scq_flags, &rcq_flags); + + _pvrdma_flush_cqe(qp, scq); + if (scq != rcq) + _pvrdma_flush_cqe(qp, rcq); + + /* + * We're now unlocking the CQs before clearing out the qp handle this + * should still be safe. We have destroyed the backend QP and flushed + * the CQEs so there should be no other completions for this QP. + */ + pvrdma_unlock_cqs(scq, rcq, &scq_flags, &rcq_flags); + + _pvrdma_free_qp(qp); +} + +static inline void _pvrdma_destroy_qp_work(struct pvrdma_dev *dev, + u32 qp_handle) +{ + union pvrdma_cmd_req req; + struct pvrdma_cmd_destroy_qp *cmd = &req.destroy_qp; + int ret; + + memset(cmd, 0, sizeof(*cmd)); + cmd->hdr.cmd = PVRDMA_CMD_DESTROY_QP; + cmd->qp_handle = qp_handle; + + ret = pvrdma_cmd_post(dev, &req, NULL, 0); + if (ret < 0) + dev_warn(&dev->pdev->dev, + "destroy queuepair failed, error: %d\n", ret); +} + +/** + * pvrdma_destroy_qp - destroy a queue pair + * @qp: the queue pair to destroy + * @udata: user data or null for kernel object + * + * @return: always 0. + */ +int pvrdma_destroy_qp(struct ib_qp *qp, struct ib_udata *udata) +{ + struct pvrdma_qp *vqp = to_vqp(qp); + + _pvrdma_destroy_qp_work(to_vdev(qp->device), vqp->qp_handle); + pvrdma_free_qp(vqp); + + return 0; +} + +static void __pvrdma_destroy_qp(struct pvrdma_dev *dev, + struct pvrdma_qp *qp) +{ + _pvrdma_destroy_qp_work(dev, qp->qp_handle); + _pvrdma_free_qp(qp); +} + +/** + * pvrdma_modify_qp - modify queue pair attributes + * @ibqp: the queue pair + * @attr: the new queue pair's attributes + * @attr_mask: attributes mask + * @udata: user data + * + * @returns 0 on success, otherwise returns an errno. + */ +int pvrdma_modify_qp(struct ib_qp *ibqp, struct ib_qp_attr *attr, + int attr_mask, struct ib_udata *udata) +{ + struct pvrdma_dev *dev = to_vdev(ibqp->device); + struct pvrdma_qp *qp = to_vqp(ibqp); + union pvrdma_cmd_req req; + union pvrdma_cmd_resp rsp; + struct pvrdma_cmd_modify_qp *cmd = &req.modify_qp; + enum ib_qp_state cur_state, next_state; + int ret; + + if (attr_mask & ~IB_QP_ATTR_STANDARD_BITS) + return -EOPNOTSUPP; + + /* Sanity checking. Should need lock here */ + mutex_lock(&qp->mutex); + cur_state = (attr_mask & IB_QP_CUR_STATE) ? attr->cur_qp_state : + qp->state; + next_state = (attr_mask & IB_QP_STATE) ? attr->qp_state : cur_state; + + if (!ib_modify_qp_is_ok(cur_state, next_state, ibqp->qp_type, + attr_mask)) { + ret = -EINVAL; + goto out; + } + + if (attr_mask & IB_QP_PORT) { + if (attr->port_num == 0 || + attr->port_num > ibqp->device->phys_port_cnt) { + ret = -EINVAL; + goto out; + } + } + + if (attr_mask & IB_QP_MIN_RNR_TIMER) { + if (attr->min_rnr_timer > 31) { + ret = -EINVAL; + goto out; + } + } + + if (attr_mask & IB_QP_PKEY_INDEX) { + if (attr->pkey_index >= dev->dsr->caps.max_pkeys) { + ret = -EINVAL; + goto out; + } + } + + if (attr_mask & IB_QP_QKEY) + qp->qkey = attr->qkey; + + if (cur_state == next_state && cur_state == IB_QPS_RESET) { + ret = 0; + goto out; + } + + qp->state = next_state; + memset(cmd, 0, sizeof(*cmd)); + cmd->hdr.cmd = PVRDMA_CMD_MODIFY_QP; + cmd->qp_handle = qp->qp_handle; + cmd->attr_mask = ib_qp_attr_mask_to_pvrdma(attr_mask); + cmd->attrs.qp_state = ib_qp_state_to_pvrdma(attr->qp_state); + cmd->attrs.cur_qp_state = + ib_qp_state_to_pvrdma(attr->cur_qp_state); + cmd->attrs.path_mtu = ib_mtu_to_pvrdma(attr->path_mtu); + cmd->attrs.path_mig_state = + ib_mig_state_to_pvrdma(attr->path_mig_state); + cmd->attrs.qkey = attr->qkey; + cmd->attrs.rq_psn = attr->rq_psn; + cmd->attrs.sq_psn = attr->sq_psn; + cmd->attrs.dest_qp_num = attr->dest_qp_num; + cmd->attrs.qp_access_flags = + ib_access_flags_to_pvrdma(attr->qp_access_flags); + cmd->attrs.pkey_index = attr->pkey_index; + cmd->attrs.alt_pkey_index = attr->alt_pkey_index; + cmd->attrs.en_sqd_async_notify = attr->en_sqd_async_notify; + cmd->attrs.sq_draining = attr->sq_draining; + cmd->attrs.max_rd_atomic = attr->max_rd_atomic; + cmd->attrs.max_dest_rd_atomic = attr->max_dest_rd_atomic; + cmd->attrs.min_rnr_timer = attr->min_rnr_timer; + cmd->attrs.port_num = attr->port_num; + cmd->attrs.timeout = attr->timeout; + cmd->attrs.retry_cnt = attr->retry_cnt; + cmd->attrs.rnr_retry = attr->rnr_retry; + cmd->attrs.alt_port_num = attr->alt_port_num; + cmd->attrs.alt_timeout = attr->alt_timeout; + ib_qp_cap_to_pvrdma(&cmd->attrs.cap, &attr->cap); + rdma_ah_attr_to_pvrdma(&cmd->attrs.ah_attr, &attr->ah_attr); + rdma_ah_attr_to_pvrdma(&cmd->attrs.alt_ah_attr, &attr->alt_ah_attr); + + ret = pvrdma_cmd_post(dev, &req, &rsp, PVRDMA_CMD_MODIFY_QP_RESP); + if (ret < 0) { + dev_warn(&dev->pdev->dev, + "could not modify queuepair, error: %d\n", ret); + } else if (rsp.hdr.err > 0) { + dev_warn(&dev->pdev->dev, + "cannot modify queuepair, error: %d\n", rsp.hdr.err); + ret = -EINVAL; + } + + if (ret == 0 && next_state == IB_QPS_RESET) + pvrdma_reset_qp(qp); + +out: + mutex_unlock(&qp->mutex); + + return ret; +} + +static inline void *get_sq_wqe(struct pvrdma_qp *qp, unsigned int n) +{ + return pvrdma_page_dir_get_ptr(&qp->pdir, + qp->sq.offset + n * qp->sq.wqe_size); +} + +static inline void *get_rq_wqe(struct pvrdma_qp *qp, unsigned int n) +{ + return pvrdma_page_dir_get_ptr(&qp->pdir, + qp->rq.offset + n * qp->rq.wqe_size); +} + +static int set_reg_seg(struct pvrdma_sq_wqe_hdr *wqe_hdr, + const struct ib_reg_wr *wr) +{ + struct pvrdma_user_mr *mr = to_vmr(wr->mr); + + wqe_hdr->wr.fast_reg.iova_start = mr->ibmr.iova; + wqe_hdr->wr.fast_reg.pl_pdir_dma = mr->pdir.dir_dma; + wqe_hdr->wr.fast_reg.page_shift = mr->page_shift; + wqe_hdr->wr.fast_reg.page_list_len = mr->npages; + wqe_hdr->wr.fast_reg.length = mr->ibmr.length; + wqe_hdr->wr.fast_reg.access_flags = wr->access; + wqe_hdr->wr.fast_reg.rkey = wr->key; + + return pvrdma_page_dir_insert_page_list(&mr->pdir, mr->pages, + mr->npages); +} + +/** + * pvrdma_post_send - post send work request entries on a QP + * @ibqp: the QP + * @wr: work request list to post + * @bad_wr: the first bad WR returned + * + * @return: 0 on success, otherwise errno returned. + */ +int pvrdma_post_send(struct ib_qp *ibqp, const struct ib_send_wr *wr, + const struct ib_send_wr **bad_wr) +{ + struct pvrdma_qp *qp = to_vqp(ibqp); + struct pvrdma_dev *dev = to_vdev(ibqp->device); + unsigned long flags; + struct pvrdma_sq_wqe_hdr *wqe_hdr; + struct pvrdma_sge *sge; + int i, ret; + + /* + * In states lower than RTS, we can fail immediately. In other states, + * just post and let the device figure it out. + */ + if (qp->state < IB_QPS_RTS) { + *bad_wr = wr; + return -EINVAL; + } + + spin_lock_irqsave(&qp->sq.lock, flags); + + while (wr) { + unsigned int tail = 0; + + if (unlikely(!pvrdma_idx_ring_has_space( + qp->sq.ring, qp->sq.wqe_cnt, &tail))) { + dev_warn_ratelimited(&dev->pdev->dev, + "send queue is full\n"); + *bad_wr = wr; + ret = -ENOMEM; + goto out; + } + + if (unlikely(wr->num_sge > qp->sq.max_sg || wr->num_sge < 0)) { + dev_warn_ratelimited(&dev->pdev->dev, + "send SGE overflow\n"); + *bad_wr = wr; + ret = -EINVAL; + goto out; + } + + /* + * Only support UD, RC. + * Need to check opcode table for thorough checking. + * opcode _UD _UC _RC + * _SEND x x x + * _SEND_WITH_IMM x x x + * _RDMA_WRITE x x + * _RDMA_WRITE_WITH_IMM x x + * _LOCAL_INV x x + * _SEND_WITH_INV x x + * _RDMA_READ x + * _ATOMIC_CMP_AND_SWP x + * _ATOMIC_FETCH_AND_ADD x + * _MASK_ATOMIC_CMP_AND_SWP x + * _MASK_ATOMIC_FETCH_AND_ADD x + * _REG_MR x + * + */ + if (qp->ibqp.qp_type != IB_QPT_UD && + qp->ibqp.qp_type != IB_QPT_RC && + wr->opcode != IB_WR_SEND) { + dev_warn_ratelimited(&dev->pdev->dev, + "unsupported queuepair type\n"); + *bad_wr = wr; + ret = -EINVAL; + goto out; + } else if (qp->ibqp.qp_type == IB_QPT_UD || + qp->ibqp.qp_type == IB_QPT_GSI) { + if (wr->opcode != IB_WR_SEND && + wr->opcode != IB_WR_SEND_WITH_IMM) { + dev_warn_ratelimited(&dev->pdev->dev, + "invalid send opcode\n"); + *bad_wr = wr; + ret = -EINVAL; + goto out; + } + } + + wqe_hdr = (struct pvrdma_sq_wqe_hdr *)get_sq_wqe(qp, tail); + memset(wqe_hdr, 0, sizeof(*wqe_hdr)); + wqe_hdr->wr_id = wr->wr_id; + wqe_hdr->num_sge = wr->num_sge; + wqe_hdr->opcode = ib_wr_opcode_to_pvrdma(wr->opcode); + wqe_hdr->send_flags = ib_send_flags_to_pvrdma(wr->send_flags); + if (wr->opcode == IB_WR_SEND_WITH_IMM || + wr->opcode == IB_WR_RDMA_WRITE_WITH_IMM) + wqe_hdr->ex.imm_data = wr->ex.imm_data; + + if (unlikely(wqe_hdr->opcode == PVRDMA_WR_ERROR)) { + *bad_wr = wr; + ret = -EINVAL; + goto out; + } + + switch (qp->ibqp.qp_type) { + case IB_QPT_GSI: + case IB_QPT_UD: + if (unlikely(!ud_wr(wr)->ah)) { + dev_warn_ratelimited(&dev->pdev->dev, + "invalid address handle\n"); + *bad_wr = wr; + ret = -EINVAL; + goto out; + } + + /* + * Use qkey from qp context if high order bit set, + * otherwise from work request. + */ + wqe_hdr->wr.ud.remote_qpn = ud_wr(wr)->remote_qpn; + wqe_hdr->wr.ud.remote_qkey = + ud_wr(wr)->remote_qkey & 0x80000000 ? + qp->qkey : ud_wr(wr)->remote_qkey; + wqe_hdr->wr.ud.av = to_vah(ud_wr(wr)->ah)->av; + + break; + case IB_QPT_RC: + switch (wr->opcode) { + case IB_WR_RDMA_READ: + case IB_WR_RDMA_WRITE: + case IB_WR_RDMA_WRITE_WITH_IMM: + wqe_hdr->wr.rdma.remote_addr = + rdma_wr(wr)->remote_addr; + wqe_hdr->wr.rdma.rkey = rdma_wr(wr)->rkey; + break; + case IB_WR_LOCAL_INV: + case IB_WR_SEND_WITH_INV: + wqe_hdr->ex.invalidate_rkey = + wr->ex.invalidate_rkey; + break; + case IB_WR_ATOMIC_CMP_AND_SWP: + case IB_WR_ATOMIC_FETCH_AND_ADD: + wqe_hdr->wr.atomic.remote_addr = + atomic_wr(wr)->remote_addr; + wqe_hdr->wr.atomic.rkey = atomic_wr(wr)->rkey; + wqe_hdr->wr.atomic.compare_add = + atomic_wr(wr)->compare_add; + if (wr->opcode == IB_WR_ATOMIC_CMP_AND_SWP) + wqe_hdr->wr.atomic.swap = + atomic_wr(wr)->swap; + break; + case IB_WR_REG_MR: + ret = set_reg_seg(wqe_hdr, reg_wr(wr)); + if (ret < 0) { + dev_warn_ratelimited(&dev->pdev->dev, + "Failed to set fast register work request\n"); + *bad_wr = wr; + goto out; + } + break; + default: + break; + } + + break; + default: + dev_warn_ratelimited(&dev->pdev->dev, + "invalid queuepair type\n"); + ret = -EINVAL; + *bad_wr = wr; + goto out; + } + + sge = (struct pvrdma_sge *)(wqe_hdr + 1); + for (i = 0; i < wr->num_sge; i++) { + /* Need to check wqe_size 0 or max size */ + sge->addr = wr->sg_list[i].addr; + sge->length = wr->sg_list[i].length; + sge->lkey = wr->sg_list[i].lkey; + sge++; + } + + /* Make sure wqe is written before index update */ + smp_wmb(); + + /* Update shared sq ring */ + pvrdma_idx_ring_inc(&qp->sq.ring->prod_tail, + qp->sq.wqe_cnt); + + wr = wr->next; + } + + ret = 0; + +out: + spin_unlock_irqrestore(&qp->sq.lock, flags); + + if (!ret) + pvrdma_write_uar_qp(dev, PVRDMA_UAR_QP_SEND | qp->qp_handle); + + return ret; +} + +/** + * pvrdma_post_recv - post receive work request entries on a QP + * @ibqp: the QP + * @wr: the work request list to post + * @bad_wr: the first bad WR returned + * + * @return: 0 on success, otherwise errno returned. + */ +int pvrdma_post_recv(struct ib_qp *ibqp, const struct ib_recv_wr *wr, + const struct ib_recv_wr **bad_wr) +{ + struct pvrdma_dev *dev = to_vdev(ibqp->device); + unsigned long flags; + struct pvrdma_qp *qp = to_vqp(ibqp); + struct pvrdma_rq_wqe_hdr *wqe_hdr; + struct pvrdma_sge *sge; + int ret = 0; + int i; + + /* + * In the RESET state, we can fail immediately. For other states, + * just post and let the device figure it out. + */ + if (qp->state == IB_QPS_RESET) { + *bad_wr = wr; + return -EINVAL; + } + + if (qp->srq) { + dev_warn(&dev->pdev->dev, "QP associated with SRQ\n"); + *bad_wr = wr; + return -EINVAL; + } + + spin_lock_irqsave(&qp->rq.lock, flags); + + while (wr) { + unsigned int tail = 0; + + if (unlikely(wr->num_sge > qp->rq.max_sg || + wr->num_sge < 0)) { + ret = -EINVAL; + *bad_wr = wr; + dev_warn_ratelimited(&dev->pdev->dev, + "recv SGE overflow\n"); + goto out; + } + + if (unlikely(!pvrdma_idx_ring_has_space( + qp->rq.ring, qp->rq.wqe_cnt, &tail))) { + ret = -ENOMEM; + *bad_wr = wr; + dev_warn_ratelimited(&dev->pdev->dev, + "recv queue full\n"); + goto out; + } + + wqe_hdr = (struct pvrdma_rq_wqe_hdr *)get_rq_wqe(qp, tail); + wqe_hdr->wr_id = wr->wr_id; + wqe_hdr->num_sge = wr->num_sge; + wqe_hdr->total_len = 0; + + sge = (struct pvrdma_sge *)(wqe_hdr + 1); + for (i = 0; i < wr->num_sge; i++) { + sge->addr = wr->sg_list[i].addr; + sge->length = wr->sg_list[i].length; + sge->lkey = wr->sg_list[i].lkey; + sge++; + } + + /* Make sure wqe is written before index update */ + smp_wmb(); + + /* Update shared rq ring */ + pvrdma_idx_ring_inc(&qp->rq.ring->prod_tail, + qp->rq.wqe_cnt); + + wr = wr->next; + } + + spin_unlock_irqrestore(&qp->rq.lock, flags); + + pvrdma_write_uar_qp(dev, PVRDMA_UAR_QP_RECV | qp->qp_handle); + + return ret; + +out: + spin_unlock_irqrestore(&qp->rq.lock, flags); + + return ret; +} + +/** + * pvrdma_query_qp - query a queue pair's attributes + * @ibqp: the queue pair to query + * @attr: the queue pair's attributes + * @attr_mask: attributes mask + * @init_attr: initial queue pair attributes + * + * @returns 0 on success, otherwise returns an errno. + */ +int pvrdma_query_qp(struct ib_qp *ibqp, struct ib_qp_attr *attr, + int attr_mask, struct ib_qp_init_attr *init_attr) +{ + struct pvrdma_dev *dev = to_vdev(ibqp->device); + struct pvrdma_qp *qp = to_vqp(ibqp); + union pvrdma_cmd_req req; + union pvrdma_cmd_resp rsp; + struct pvrdma_cmd_query_qp *cmd = &req.query_qp; + struct pvrdma_cmd_query_qp_resp *resp = &rsp.query_qp_resp; + int ret = 0; + + mutex_lock(&qp->mutex); + + if (qp->state == IB_QPS_RESET) { + attr->qp_state = IB_QPS_RESET; + goto out; + } + + memset(cmd, 0, sizeof(*cmd)); + cmd->hdr.cmd = PVRDMA_CMD_QUERY_QP; + cmd->qp_handle = qp->qp_handle; + cmd->attr_mask = ib_qp_attr_mask_to_pvrdma(attr_mask); + + ret = pvrdma_cmd_post(dev, &req, &rsp, PVRDMA_CMD_QUERY_QP_RESP); + if (ret < 0) { + dev_warn(&dev->pdev->dev, + "could not query queuepair, error: %d\n", ret); + goto out; + } + + attr->qp_state = pvrdma_qp_state_to_ib(resp->attrs.qp_state); + attr->cur_qp_state = + pvrdma_qp_state_to_ib(resp->attrs.cur_qp_state); + attr->path_mtu = pvrdma_mtu_to_ib(resp->attrs.path_mtu); + attr->path_mig_state = + pvrdma_mig_state_to_ib(resp->attrs.path_mig_state); + attr->qkey = resp->attrs.qkey; + attr->rq_psn = resp->attrs.rq_psn; + attr->sq_psn = resp->attrs.sq_psn; + attr->dest_qp_num = resp->attrs.dest_qp_num; + attr->qp_access_flags = + pvrdma_access_flags_to_ib(resp->attrs.qp_access_flags); + attr->pkey_index = resp->attrs.pkey_index; + attr->alt_pkey_index = resp->attrs.alt_pkey_index; + attr->en_sqd_async_notify = resp->attrs.en_sqd_async_notify; + attr->sq_draining = resp->attrs.sq_draining; + attr->max_rd_atomic = resp->attrs.max_rd_atomic; + attr->max_dest_rd_atomic = resp->attrs.max_dest_rd_atomic; + attr->min_rnr_timer = resp->attrs.min_rnr_timer; + attr->port_num = resp->attrs.port_num; + attr->timeout = resp->attrs.timeout; + attr->retry_cnt = resp->attrs.retry_cnt; + attr->rnr_retry = resp->attrs.rnr_retry; + attr->alt_port_num = resp->attrs.alt_port_num; + attr->alt_timeout = resp->attrs.alt_timeout; + pvrdma_qp_cap_to_ib(&attr->cap, &resp->attrs.cap); + pvrdma_ah_attr_to_rdma(&attr->ah_attr, &resp->attrs.ah_attr); + pvrdma_ah_attr_to_rdma(&attr->alt_ah_attr, &resp->attrs.alt_ah_attr); + + qp->state = attr->qp_state; + + ret = 0; + +out: + attr->cur_qp_state = attr->qp_state; + + init_attr->event_handler = qp->ibqp.event_handler; + init_attr->qp_context = qp->ibqp.qp_context; + init_attr->send_cq = qp->ibqp.send_cq; + init_attr->recv_cq = qp->ibqp.recv_cq; + init_attr->srq = qp->ibqp.srq; + init_attr->xrcd = NULL; + init_attr->cap = attr->cap; + init_attr->sq_sig_type = 0; + init_attr->qp_type = qp->ibqp.qp_type; + init_attr->create_flags = 0; + init_attr->port_num = qp->port; + + mutex_unlock(&qp->mutex); + return ret; +} |