356 lines
9.3 KiB
C
356 lines
9.3 KiB
C
|
/*
|
||
|
|
* Copyright(c) 2016 Intel Corporation.
|
||
|
|
*
|
||
|
|
* This file is provided under a dual BSD/GPLv2 license. When using or
|
||
|
|
* redistributing this file, you may do so under either license.
|
||
|
|
*
|
||
|
|
* GPL LICENSE SUMMARY
|
||
|
|
*
|
||
|
|
* This program is free software; you can redistribute it and/or modify
|
||
|
|
* it under the terms of version 2 of the GNU General Public License as
|
||
|
|
* published by the Free Software Foundation.
|
||
|
|
*
|
||
|
|
* 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 for more details.
|
||
|
|
*
|
||
|
|
* BSD 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.
|
||
|
|
* - Neither the name of Intel Corporation nor the names of its
|
||
|
|
* contributors may be used to endorse or promote products derived
|
||
|
|
* from this software without specific prior written permission.
|
||
|
|
*
|
||
|
|
* 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
|
||
|
|
* OWNER 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 <linux/err.h>
|
||
|
|
#include <linux/slab.h>
|
||
|
|
#include <linux/vmalloc.h>
|
||
|
|
|
||
|
|
#include "srq.h"
|
||
|
|
#include "vt.h"
|
||
|
|
|
||
|
|
/**
|
||
|
|
* rvt_driver_srq_init - init srq resources on a per driver basis
|
||
|
|
* @rdi: rvt dev structure
|
||
|
|
*
|
||
|
|
* Do any initialization needed when a driver registers with rdmavt.
|
||
|
|
*/
|
||
|
|
void rvt_driver_srq_init(struct rvt_dev_info *rdi)
|
||
|
|
{
|
||
|
|
spin_lock_init(&rdi->n_srqs_lock);
|
||
|
|
rdi->n_srqs_allocated = 0;
|
||
|
|
}
|
||
|
|
|
||
|
|
/**
|
||
|
|
* rvt_create_srq - create a shared receive queue
|
||
|
|
* @ibpd: the protection domain of the SRQ to create
|
||
|
|
* @srq_init_attr: the attributes of the SRQ
|
||
|
|
* @udata: data from libibverbs when creating a user SRQ
|
||
|
|
*
|
||
|
|
* Return: Allocated srq object
|
||
|
|
*/
|
||
|
|
struct ib_srq *rvt_create_srq(struct ib_pd *ibpd,
|
||
|
|
struct ib_srq_init_attr *srq_init_attr,
|
||
|
|
struct ib_udata *udata)
|
||
|
|
{
|
||
|
|
struct rvt_dev_info *dev = ib_to_rvt(ibpd->device);
|
||
|
|
struct rvt_srq *srq;
|
||
|
|
u32 sz;
|
||
|
|
struct ib_srq *ret;
|
||
|
|
|
||
|
|
if (srq_init_attr->srq_type != IB_SRQT_BASIC)
|
||
|
|
return ERR_PTR(-EOPNOTSUPP);
|
||
|
|
|
||
|
|
if (srq_init_attr->attr.max_sge == 0 ||
|
||
|
|
srq_init_attr->attr.max_sge > dev->dparms.props.max_srq_sge ||
|
||
|
|
srq_init_attr->attr.max_wr == 0 ||
|
||
|
|
srq_init_attr->attr.max_wr > dev->dparms.props.max_srq_wr)
|
||
|
|
return ERR_PTR(-EINVAL);
|
||
|
|
|
||
|
|
srq = kzalloc_node(sizeof(*srq), GFP_KERNEL, dev->dparms.node);
|
||
|
|
if (!srq)
|
||
|
|
return ERR_PTR(-ENOMEM);
|
||
|
|
|
||
|
|
/*
|
||
|
|
* Need to use vmalloc() if we want to support large #s of entries.
|
||
|
|
*/
|
||
|
|
srq->rq.size = srq_init_attr->attr.max_wr + 1;
|
||
|
|
srq->rq.max_sge = srq_init_attr->attr.max_sge;
|
||
|
|
sz = sizeof(struct ib_sge) * srq->rq.max_sge +
|
||
|
|
sizeof(struct rvt_rwqe);
|
||
|
|
srq->rq.wq = udata ?
|
||
|
|
vmalloc_user(sizeof(struct rvt_rwq) + srq->rq.size * sz) :
|
||
|
|
vzalloc_node(sizeof(struct rvt_rwq) + srq->rq.size * sz,
|
||
|
|
dev->dparms.node);
|
||
|
|
if (!srq->rq.wq) {
|
||
|
|
ret = ERR_PTR(-ENOMEM);
|
||
|
|
goto bail_srq;
|
||
|
|
}
|
||
|
|
|
||
|
|
/*
|
||
|
|
* Return the address of the RWQ as the offset to mmap.
|
||
|
|
* See rvt_mmap() for details.
|
||
|
|
*/
|
||
|
|
if (udata && udata->outlen >= sizeof(__u64)) {
|
||
|
|
int err;
|
||
|
|
u32 s = sizeof(struct rvt_rwq) + srq->rq.size * sz;
|
||
|
|
|
||
|
|
srq->ip =
|
||
|
|
rvt_create_mmap_info(dev, s, ibpd->uobject->context,
|
||
|
|
srq->rq.wq);
|
||
|
|
if (!srq->ip) {
|
||
|
|
ret = ERR_PTR(-ENOMEM);
|
||
|
|
goto bail_wq;
|
||
|
|
}
|
||
|
|
|
||
|
|
err = ib_copy_to_udata(udata, &srq->ip->offset,
|
||
|
|
sizeof(srq->ip->offset));
|
||
|
|
if (err) {
|
||
|
|
ret = ERR_PTR(err);
|
||
|
|
goto bail_ip;
|
||
|
|
}
|
||
|
|
}
|
||
|
|
|
||
|
|
/*
|
||
|
|
* ib_create_srq() will initialize srq->ibsrq.
|
||
|
|
*/
|
||
|
|
spin_lock_init(&srq->rq.lock);
|
||
|
|
srq->limit = srq_init_attr->attr.srq_limit;
|
||
|
|
|
||
|
|
spin_lock(&dev->n_srqs_lock);
|
||
|
|
if (dev->n_srqs_allocated == dev->dparms.props.max_srq) {
|
||
|
|
spin_unlock(&dev->n_srqs_lock);
|
||
|
|
ret = ERR_PTR(-ENOMEM);
|
||
|
|
goto bail_ip;
|
||
|
|
}
|
||
|
|
|
||
|
|
dev->n_srqs_allocated++;
|
||
|
|
spin_unlock(&dev->n_srqs_lock);
|
||
|
|
|
||
|
|
if (srq->ip) {
|
||
|
|
spin_lock_irq(&dev->pending_lock);
|
||
|
|
list_add(&srq->ip->pending_mmaps, &dev->pending_mmaps);
|
||
|
|
spin_unlock_irq(&dev->pending_lock);
|
||
|
|
}
|
||
|
|
|
||
|
|
return &srq->ibsrq;
|
||
|
|
|
||
|
|
bail_ip:
|
||
|
|
kfree(srq->ip);
|
||
|
|
bail_wq:
|
||
|
|
vfree(srq->rq.wq);
|
||
|
|
bail_srq:
|
||
|
|
kfree(srq);
|
||
|
|
return ret;
|
||
|
|
}
|
||
|
|
|
||
|
|
/**
|
||
|
|
* rvt_modify_srq - modify a shared receive queue
|
||
|
|
* @ibsrq: the SRQ to modify
|
||
|
|
* @attr: the new attributes of the SRQ
|
||
|
|
* @attr_mask: indicates which attributes to modify
|
||
|
|
* @udata: user data for libibverbs.so
|
||
|
|
*
|
||
|
|
* Return: 0 on success
|
||
|
|
*/
|
||
|
|
int rvt_modify_srq(struct ib_srq *ibsrq, struct ib_srq_attr *attr,
|
||
|
|
enum ib_srq_attr_mask attr_mask,
|
||
|
|
struct ib_udata *udata)
|
||
|
|
{
|
||
|
|
struct rvt_srq *srq = ibsrq_to_rvtsrq(ibsrq);
|
||
|
|
struct rvt_dev_info *dev = ib_to_rvt(ibsrq->device);
|
||
|
|
struct rvt_rwq *wq;
|
||
|
|
int ret = 0;
|
||
|
|
|
||
|
|
if (attr_mask & IB_SRQ_MAX_WR) {
|
||
|
|
struct rvt_rwq *owq;
|
||
|
|
struct rvt_rwqe *p;
|
||
|
|
u32 sz, size, n, head, tail;
|
||
|
|
|
||
|
|
/* Check that the requested sizes are below the limits. */
|
||
|
|
if ((attr->max_wr > dev->dparms.props.max_srq_wr) ||
|
||
|
|
((attr_mask & IB_SRQ_LIMIT) ?
|
||
|
|
attr->srq_limit : srq->limit) > attr->max_wr)
|
||
|
|
return -EINVAL;
|
||
|
|
|
||
|
|
sz = sizeof(struct rvt_rwqe) +
|
||
|
|
srq->rq.max_sge * sizeof(struct ib_sge);
|
||
|
|
size = attr->max_wr + 1;
|
||
|
|
wq = udata ?
|
||
|
|
vmalloc_user(sizeof(struct rvt_rwq) + size * sz) :
|
||
|
|
vzalloc_node(sizeof(struct rvt_rwq) + size * sz,
|
||
|
|
dev->dparms.node);
|
||
|
|
if (!wq)
|
||
|
|
return -ENOMEM;
|
||
|
|
|
||
|
|
/* Check that we can write the offset to mmap. */
|
||
|
|
if (udata && udata->inlen >= sizeof(__u64)) {
|
||
|
|
__u64 offset_addr;
|
||
|
|
__u64 offset = 0;
|
||
|
|
|
||
|
|
ret = ib_copy_from_udata(&offset_addr, udata,
|
||
|
|
sizeof(offset_addr));
|
||
|
|
if (ret)
|
||
|
|
goto bail_free;
|
||
|
|
udata->outbuf = (void __user *)
|
||
|
|
(unsigned long)offset_addr;
|
||
|
|
ret = ib_copy_to_udata(udata, &offset,
|
||
|
|
sizeof(offset));
|
||
|
|
if (ret)
|
||
|
|
goto bail_free;
|
||
|
|
}
|
||
|
|
|
||
|
|
spin_lock_irq(&srq->rq.lock);
|
||
|
|
/*
|
||
|
|
* validate head and tail pointer values and compute
|
||
|
|
* the number of remaining WQEs.
|
||
|
|
*/
|
||
|
|
owq = srq->rq.wq;
|
||
|
|
head = owq->head;
|
||
|
|
tail = owq->tail;
|
||
|
|
if (head >= srq->rq.size || tail >= srq->rq.size) {
|
||
|
|
ret = -EINVAL;
|
||
|
|
goto bail_unlock;
|
||
|
|
}
|
||
|
|
n = head;
|
||
|
|
if (n < tail)
|
||
|
|
n += srq->rq.size - tail;
|
||
|
|
else
|
||
|
|
n -= tail;
|
||
|
|
if (size <= n) {
|
||
|
|
ret = -EINVAL;
|
||
|
|
goto bail_unlock;
|
||
|
|
}
|
||
|
|
n = 0;
|
||
|
|
p = wq->wq;
|
||
|
|
while (tail != head) {
|
||
|
|
struct rvt_rwqe *wqe;
|
||
|
|
int i;
|
||
|
|
|
||
|
|
wqe = rvt_get_rwqe_ptr(&srq->rq, tail);
|
||
|
|
p->wr_id = wqe->wr_id;
|
||
|
|
p->num_sge = wqe->num_sge;
|
||
|
|
for (i = 0; i < wqe->num_sge; i++)
|
||
|
|
p->sg_list[i] = wqe->sg_list[i];
|
||
|
|
n++;
|
||
|
|
p = (struct rvt_rwqe *)((char *)p + sz);
|
||
|
|
if (++tail >= srq->rq.size)
|
||
|
|
tail = 0;
|
||
|
|
}
|
||
|
|
srq->rq.wq = wq;
|
||
|
|
srq->rq.size = size;
|
||
|
|
wq->head = n;
|
||
|
|
wq->tail = 0;
|
||
|
|
if (attr_mask & IB_SRQ_LIMIT)
|
||
|
|
srq->limit = attr->srq_limit;
|
||
|
|
spin_unlock_irq(&srq->rq.lock);
|
||
|
|
|
||
|
|
vfree(owq);
|
||
|
|
|
||
|
|
if (srq->ip) {
|
||
|
|
struct rvt_mmap_info *ip = srq->ip;
|
||
|
|
struct rvt_dev_info *dev = ib_to_rvt(srq->ibsrq.device);
|
||
|
|
u32 s = sizeof(struct rvt_rwq) + size * sz;
|
||
|
|
|
||
|
|
rvt_update_mmap_info(dev, ip, s, wq);
|
||
|
|
|
||
|
|
/*
|
||
|
|
* Return the offset to mmap.
|
||
|
|
* See rvt_mmap() for details.
|
||
|
|
*/
|
||
|
|
if (udata && udata->inlen >= sizeof(__u64)) {
|
||
|
|
ret = ib_copy_to_udata(udata, &ip->offset,
|
||
|
|
sizeof(ip->offset));
|
||
|
|
if (ret)
|
||
|
|
return ret;
|
||
|
|
}
|
||
|
|
|
||
|
|
/*
|
||
|
|
* Put user mapping info onto the pending list
|
||
|
|
* unless it already is on the list.
|
||
|
|
*/
|
||
|
|
spin_lock_irq(&dev->pending_lock);
|
||
|
|
if (list_empty(&ip->pending_mmaps))
|
||
|
|
list_add(&ip->pending_mmaps,
|
||
|
|
&dev->pending_mmaps);
|
||
|
|
spin_unlock_irq(&dev->pending_lock);
|
||
|
|
}
|
||
|
|
} else if (attr_mask & IB_SRQ_LIMIT) {
|
||
|
|
spin_lock_irq(&srq->rq.lock);
|
||
|
|
if (attr->srq_limit >= srq->rq.size)
|
||
|
|
ret = -EINVAL;
|
||
|
|
else
|
||
|
|
srq->limit = attr->srq_limit;
|
||
|
|
spin_unlock_irq(&srq->rq.lock);
|
||
|
|
}
|
||
|
|
return ret;
|
||
|
|
|
||
|
|
bail_unlock:
|
||
|
|
spin_unlock_irq(&srq->rq.lock);
|
||
|
|
bail_free:
|
||
|
|
vfree(wq);
|
||
|
|
return ret;
|
||
|
|
}
|
||
|
|
|
||
|
|
/** rvt_query_srq - query srq data
|
||
|
|
* @ibsrq: srq to query
|
||
|
|
* @attr: return info in attr
|
||
|
|
*
|
||
|
|
* Return: always 0
|
||
|
|
*/
|
||
|
|
int rvt_query_srq(struct ib_srq *ibsrq, struct ib_srq_attr *attr)
|
||
|
|
{
|
||
|
|
struct rvt_srq *srq = ibsrq_to_rvtsrq(ibsrq);
|
||
|
|
|
||
|
|
attr->max_wr = srq->rq.size - 1;
|
||
|
|
attr->max_sge = srq->rq.max_sge;
|
||
|
|
attr->srq_limit = srq->limit;
|
||
|
|
return 0;
|
||
|
|
}
|
||
|
|
|
||
|
|
/**
|
||
|
|
* rvt_destroy_srq - destory an srq
|
||
|
|
* @ibsrq: srq object to destroy
|
||
|
|
*
|
||
|
|
* Return always 0
|
||
|
|
*/
|
||
|
|
int rvt_destroy_srq(struct ib_srq *ibsrq)
|
||
|
|
{
|
||
|
|
struct rvt_srq *srq = ibsrq_to_rvtsrq(ibsrq);
|
||
|
|
struct rvt_dev_info *dev = ib_to_rvt(ibsrq->device);
|
||
|
|
|
||
|
|
spin_lock(&dev->n_srqs_lock);
|
||
|
|
dev->n_srqs_allocated--;
|
||
|
|
spin_unlock(&dev->n_srqs_lock);
|
||
|
|
if (srq->ip)
|
||
|
|
kref_put(&srq->ip->ref, rvt_release_mmap_info);
|
||
|
|
else
|
||
|
|
vfree(srq->rq.wq);
|
||
|
|
kfree(srq);
|
||
|
|
|
||
|
|
return 0;
|
||
|
|
}
|