^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1) /*
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2) * Copyright(c) 2016 Intel Corporation.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 3) *
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 4) * This file is provided under a dual BSD/GPLv2 license. When using or
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 5) * redistributing this file, you may do so under either license.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 6) *
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 7) * GPL LICENSE SUMMARY
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 8) *
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 9) * This program is free software; you can redistribute it and/or modify
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 10) * it under the terms of version 2 of the GNU General Public License as
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 11) * published by the Free Software Foundation.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 12) *
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 13) * This program is distributed in the hope that it will be useful, but
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 14) * WITHOUT ANY WARRANTY; without even the implied warranty of
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 15) * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 16) * General Public License for more details.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 17) *
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 18) * BSD LICENSE
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 19) *
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 20) * Redistribution and use in source and binary forms, with or without
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 21) * modification, are permitted provided that the following conditions
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 22) * are met:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 23) *
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 24) * - Redistributions of source code must retain the above copyright
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 25) * notice, this list of conditions and the following disclaimer.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 26) * - Redistributions in binary form must reproduce the above copyright
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 27) * notice, this list of conditions and the following disclaimer in
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 28) * the documentation and/or other materials provided with the
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 29) * distribution.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 30) * - Neither the name of Intel Corporation nor the names of its
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 31) * contributors may be used to endorse or promote products derived
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 32) * from this software without specific prior written permission.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 33) *
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 34) * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 35) * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 36) * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 37) * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 38) * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 39) * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 40) * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 41) * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 42) * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 43) * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 44) * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 45) *
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 46) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 47)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 48) #include <linux/err.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 49) #include <linux/slab.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 50) #include <linux/vmalloc.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 51) #include <rdma/uverbs_ioctl.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 52)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 53) #include "srq.h"
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 54) #include "vt.h"
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 55) #include "qp.h"
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 56) /**
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 57) * rvt_driver_srq_init - init srq resources on a per driver basis
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 58) * @rdi: rvt dev structure
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 59) *
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 60) * Do any initialization needed when a driver registers with rdmavt.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 61) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 62) void rvt_driver_srq_init(struct rvt_dev_info *rdi)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 63) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 64) spin_lock_init(&rdi->n_srqs_lock);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 65) rdi->n_srqs_allocated = 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 66) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 67)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 68) /**
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 69) * rvt_create_srq - create a shared receive queue
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 70) * @ibpd: the protection domain of the SRQ to create
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 71) * @srq_init_attr: the attributes of the SRQ
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 72) * @udata: data from libibverbs when creating a user SRQ
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 73) *
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 74) * Return: 0 on success
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 75) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 76) int rvt_create_srq(struct ib_srq *ibsrq, struct ib_srq_init_attr *srq_init_attr,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 77) struct ib_udata *udata)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 78) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 79) struct rvt_dev_info *dev = ib_to_rvt(ibsrq->device);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 80) struct rvt_srq *srq = ibsrq_to_rvtsrq(ibsrq);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 81) u32 sz;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 82) int ret;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 83)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 84) if (srq_init_attr->srq_type != IB_SRQT_BASIC)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 85) return -EOPNOTSUPP;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 86)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 87) if (srq_init_attr->attr.max_sge == 0 ||
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 88) srq_init_attr->attr.max_sge > dev->dparms.props.max_srq_sge ||
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 89) srq_init_attr->attr.max_wr == 0 ||
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 90) srq_init_attr->attr.max_wr > dev->dparms.props.max_srq_wr)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 91) return -EINVAL;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 92)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 93) /*
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 94) * Need to use vmalloc() if we want to support large #s of entries.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 95) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 96) srq->rq.size = srq_init_attr->attr.max_wr + 1;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 97) srq->rq.max_sge = srq_init_attr->attr.max_sge;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 98) sz = sizeof(struct ib_sge) * srq->rq.max_sge +
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 99) sizeof(struct rvt_rwqe);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 100) if (rvt_alloc_rq(&srq->rq, srq->rq.size * sz,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 101) dev->dparms.node, udata)) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 102) ret = -ENOMEM;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 103) goto bail_srq;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 104) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 105)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 106) /*
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 107) * Return the address of the RWQ as the offset to mmap.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 108) * See rvt_mmap() for details.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 109) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 110) if (udata && udata->outlen >= sizeof(__u64)) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 111) u32 s = sizeof(struct rvt_rwq) + srq->rq.size * sz;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 112)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 113) srq->ip = rvt_create_mmap_info(dev, s, udata, srq->rq.wq);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 114) if (IS_ERR(srq->ip)) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 115) ret = PTR_ERR(srq->ip);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 116) goto bail_wq;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 117) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 118)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 119) ret = ib_copy_to_udata(udata, &srq->ip->offset,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 120) sizeof(srq->ip->offset));
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 121) if (ret)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 122) goto bail_ip;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 123) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 124)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 125) /*
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 126) * ib_create_srq() will initialize srq->ibsrq.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 127) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 128) spin_lock_init(&srq->rq.lock);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 129) srq->limit = srq_init_attr->attr.srq_limit;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 130)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 131) spin_lock(&dev->n_srqs_lock);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 132) if (dev->n_srqs_allocated == dev->dparms.props.max_srq) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 133) spin_unlock(&dev->n_srqs_lock);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 134) ret = -ENOMEM;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 135) goto bail_ip;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 136) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 137)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 138) dev->n_srqs_allocated++;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 139) spin_unlock(&dev->n_srqs_lock);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 140)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 141) if (srq->ip) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 142) spin_lock_irq(&dev->pending_lock);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 143) list_add(&srq->ip->pending_mmaps, &dev->pending_mmaps);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 144) spin_unlock_irq(&dev->pending_lock);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 145) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 146)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 147) return 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 148)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 149) bail_ip:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 150) kfree(srq->ip);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 151) bail_wq:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 152) rvt_free_rq(&srq->rq);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 153) bail_srq:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 154) return ret;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 155) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 156)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 157) /**
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 158) * rvt_modify_srq - modify a shared receive queue
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 159) * @ibsrq: the SRQ to modify
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 160) * @attr: the new attributes of the SRQ
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 161) * @attr_mask: indicates which attributes to modify
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 162) * @udata: user data for libibverbs.so
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 163) *
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 164) * Return: 0 on success
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 165) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 166) int rvt_modify_srq(struct ib_srq *ibsrq, struct ib_srq_attr *attr,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 167) enum ib_srq_attr_mask attr_mask,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 168) struct ib_udata *udata)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 169) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 170) struct rvt_srq *srq = ibsrq_to_rvtsrq(ibsrq);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 171) struct rvt_dev_info *dev = ib_to_rvt(ibsrq->device);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 172) struct rvt_rq tmp_rq = {};
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 173) int ret = 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 174)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 175) if (attr_mask & IB_SRQ_MAX_WR) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 176) struct rvt_krwq *okwq = NULL;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 177) struct rvt_rwq *owq = NULL;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 178) struct rvt_rwqe *p;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 179) u32 sz, size, n, head, tail;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 180)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 181) /* Check that the requested sizes are below the limits. */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 182) if ((attr->max_wr > dev->dparms.props.max_srq_wr) ||
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 183) ((attr_mask & IB_SRQ_LIMIT) ?
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 184) attr->srq_limit : srq->limit) > attr->max_wr)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 185) return -EINVAL;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 186) sz = sizeof(struct rvt_rwqe) +
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 187) srq->rq.max_sge * sizeof(struct ib_sge);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 188) size = attr->max_wr + 1;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 189) if (rvt_alloc_rq(&tmp_rq, size * sz, dev->dparms.node,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 190) udata))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 191) return -ENOMEM;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 192) /* Check that we can write the offset to mmap. */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 193) if (udata && udata->inlen >= sizeof(__u64)) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 194) __u64 offset_addr;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 195) __u64 offset = 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 196)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 197) ret = ib_copy_from_udata(&offset_addr, udata,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 198) sizeof(offset_addr));
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 199) if (ret)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 200) goto bail_free;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 201) udata->outbuf = (void __user *)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 202) (unsigned long)offset_addr;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 203) ret = ib_copy_to_udata(udata, &offset,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 204) sizeof(offset));
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 205) if (ret)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 206) goto bail_free;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 207) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 208)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 209) spin_lock_irq(&srq->rq.kwq->c_lock);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 210) /*
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 211) * validate head and tail pointer values and compute
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 212) * the number of remaining WQEs.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 213) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 214) if (udata) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 215) owq = srq->rq.wq;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 216) head = RDMA_READ_UAPI_ATOMIC(owq->head);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 217) tail = RDMA_READ_UAPI_ATOMIC(owq->tail);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 218) } else {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 219) okwq = srq->rq.kwq;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 220) head = okwq->head;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 221) tail = okwq->tail;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 222) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 223) if (head >= srq->rq.size || tail >= srq->rq.size) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 224) ret = -EINVAL;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 225) goto bail_unlock;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 226) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 227) n = head;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 228) if (n < tail)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 229) n += srq->rq.size - tail;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 230) else
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 231) n -= tail;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 232) if (size <= n) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 233) ret = -EINVAL;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 234) goto bail_unlock;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 235) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 236) n = 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 237) p = tmp_rq.kwq->curr_wq;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 238) while (tail != head) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 239) struct rvt_rwqe *wqe;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 240) int i;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 241)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 242) wqe = rvt_get_rwqe_ptr(&srq->rq, tail);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 243) p->wr_id = wqe->wr_id;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 244) p->num_sge = wqe->num_sge;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 245) for (i = 0; i < wqe->num_sge; i++)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 246) p->sg_list[i] = wqe->sg_list[i];
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 247) n++;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 248) p = (struct rvt_rwqe *)((char *)p + sz);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 249) if (++tail >= srq->rq.size)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 250) tail = 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 251) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 252) srq->rq.kwq = tmp_rq.kwq;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 253) if (udata) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 254) srq->rq.wq = tmp_rq.wq;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 255) RDMA_WRITE_UAPI_ATOMIC(tmp_rq.wq->head, n);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 256) RDMA_WRITE_UAPI_ATOMIC(tmp_rq.wq->tail, 0);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 257) } else {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 258) tmp_rq.kwq->head = n;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 259) tmp_rq.kwq->tail = 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 260) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 261) srq->rq.size = size;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 262) if (attr_mask & IB_SRQ_LIMIT)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 263) srq->limit = attr->srq_limit;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 264) spin_unlock_irq(&srq->rq.kwq->c_lock);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 265)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 266) vfree(owq);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 267) kvfree(okwq);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 268)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 269) if (srq->ip) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 270) struct rvt_mmap_info *ip = srq->ip;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 271) struct rvt_dev_info *dev = ib_to_rvt(srq->ibsrq.device);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 272) u32 s = sizeof(struct rvt_rwq) + size * sz;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 273)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 274) rvt_update_mmap_info(dev, ip, s, tmp_rq.wq);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 275)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 276) /*
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 277) * Return the offset to mmap.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 278) * See rvt_mmap() for details.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 279) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 280) if (udata && udata->inlen >= sizeof(__u64)) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 281) ret = ib_copy_to_udata(udata, &ip->offset,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 282) sizeof(ip->offset));
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 283) if (ret)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 284) return ret;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 285) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 286)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 287) /*
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 288) * Put user mapping info onto the pending list
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 289) * unless it already is on the list.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 290) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 291) spin_lock_irq(&dev->pending_lock);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 292) if (list_empty(&ip->pending_mmaps))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 293) list_add(&ip->pending_mmaps,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 294) &dev->pending_mmaps);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 295) spin_unlock_irq(&dev->pending_lock);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 296) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 297) } else if (attr_mask & IB_SRQ_LIMIT) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 298) spin_lock_irq(&srq->rq.kwq->c_lock);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 299) if (attr->srq_limit >= srq->rq.size)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 300) ret = -EINVAL;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 301) else
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 302) srq->limit = attr->srq_limit;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 303) spin_unlock_irq(&srq->rq.kwq->c_lock);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 304) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 305) return ret;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 306)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 307) bail_unlock:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 308) spin_unlock_irq(&srq->rq.kwq->c_lock);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 309) bail_free:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 310) rvt_free_rq(&tmp_rq);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 311) return ret;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 312) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 313)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 314) /** rvt_query_srq - query srq data
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 315) * @ibsrq: srq to query
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 316) * @attr: return info in attr
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 317) *
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 318) * Return: always 0
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 319) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 320) int rvt_query_srq(struct ib_srq *ibsrq, struct ib_srq_attr *attr)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 321) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 322) struct rvt_srq *srq = ibsrq_to_rvtsrq(ibsrq);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 323)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 324) attr->max_wr = srq->rq.size - 1;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 325) attr->max_sge = srq->rq.max_sge;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 326) attr->srq_limit = srq->limit;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 327) return 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 328) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 329)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 330) /**
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 331) * rvt_destroy_srq - destory an srq
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 332) * @ibsrq: srq object to destroy
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 333) *
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 334) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 335) int rvt_destroy_srq(struct ib_srq *ibsrq, struct ib_udata *udata)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 336) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 337) struct rvt_srq *srq = ibsrq_to_rvtsrq(ibsrq);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 338) struct rvt_dev_info *dev = ib_to_rvt(ibsrq->device);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 339)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 340) spin_lock(&dev->n_srqs_lock);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 341) dev->n_srqs_allocated--;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 342) spin_unlock(&dev->n_srqs_lock);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 343) if (srq->ip)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 344) kref_put(&srq->ip->ref, rvt_release_mmap_info);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 345) kvfree(srq->rq.kwq);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 346) return 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 347) }