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// 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/vmalloc.h>
#include "rxe.h"
#include "rxe_loc.h"
#include "rxe_queue.h"
int rxe_srq_chk_attr(struct rxe_dev *rxe, struct rxe_srq *srq,
struct ib_srq_attr *attr, enum ib_srq_attr_mask mask)
{
if (srq && srq->error) {
pr_warn("srq in error state\n");
goto err1;
}
if (mask & IB_SRQ_MAX_WR) {
if (attr->max_wr > rxe->attr.max_srq_wr) {
pr_warn("max_wr(%d) > max_srq_wr(%d)\n",
attr->max_wr, rxe->attr.max_srq_wr);
goto err1;
}
if (attr->max_wr <= 0) {
pr_warn("max_wr(%d) <= 0\n", attr->max_wr);
goto err1;
}
if (srq && srq->limit && (attr->max_wr < srq->limit)) {
pr_warn("max_wr (%d) < srq->limit (%d)\n",
attr->max_wr, srq->limit);
goto err1;
}
if (attr->max_wr < RXE_MIN_SRQ_WR)
attr->max_wr = RXE_MIN_SRQ_WR;
}
if (mask & IB_SRQ_LIMIT) {
if (attr->srq_limit > rxe->attr.max_srq_wr) {
pr_warn("srq_limit(%d) > max_srq_wr(%d)\n",
attr->srq_limit, rxe->attr.max_srq_wr);
goto err1;
}
if (srq && (attr->srq_limit > srq->rq.queue->buf->index_mask)) {
pr_warn("srq_limit (%d) > cur limit(%d)\n",
attr->srq_limit,
srq->rq.queue->buf->index_mask);
goto err1;
}
}
if (mask == IB_SRQ_INIT_MASK) {
if (attr->max_sge > rxe->attr.max_srq_sge) {
pr_warn("max_sge(%d) > max_srq_sge(%d)\n",
attr->max_sge, rxe->attr.max_srq_sge);
goto err1;
}
if (attr->max_sge < RXE_MIN_SRQ_SGE)
attr->max_sge = RXE_MIN_SRQ_SGE;
}
return 0;
err1:
return -EINVAL;
}
int rxe_srq_from_init(struct rxe_dev *rxe, struct rxe_srq *srq,
struct ib_srq_init_attr *init, struct ib_udata *udata,
struct rxe_create_srq_resp __user *uresp)
{
int err;
int srq_wqe_size;
struct rxe_queue *q;
srq->ibsrq.event_handler = init->event_handler;
srq->ibsrq.srq_context = init->srq_context;
srq->limit = init->attr.srq_limit;
srq->srq_num = srq->pelem.index;
srq->rq.max_wr = init->attr.max_wr;
srq->rq.max_sge = init->attr.max_sge;
srq_wqe_size = rcv_wqe_size(srq->rq.max_sge);
spin_lock_init(&srq->rq.producer_lock);
spin_lock_init(&srq->rq.consumer_lock);
q = rxe_queue_init(rxe, &srq->rq.max_wr,
srq_wqe_size);
if (!q) {
pr_warn("unable to allocate queue for srq\n");
return -ENOMEM;
}
srq->rq.queue = q;
err = do_mmap_info(rxe, uresp ? &uresp->mi : NULL, udata, q->buf,
q->buf_size, &q->ip);
if (err) {
vfree(q->buf);
kfree(q);
return err;
}
if (uresp) {
if (copy_to_user(&uresp->srq_num, &srq->srq_num,
sizeof(uresp->srq_num))) {
rxe_queue_cleanup(q);
return -EFAULT;
}
}
return 0;
}
int rxe_srq_from_attr(struct rxe_dev *rxe, struct rxe_srq *srq,
struct ib_srq_attr *attr, enum ib_srq_attr_mask mask,
struct rxe_modify_srq_cmd *ucmd, struct ib_udata *udata)
{
int err;
struct rxe_queue *q = srq->rq.queue;
struct mminfo __user *mi = NULL;
if (mask & IB_SRQ_MAX_WR) {
/*
* This is completely screwed up, the response is supposed to
* be in the outbuf not like this.
*/
mi = u64_to_user_ptr(ucmd->mmap_info_addr);
err = rxe_queue_resize(q, &attr->max_wr,
rcv_wqe_size(srq->rq.max_sge), udata, mi,
&srq->rq.producer_lock,
&srq->rq.consumer_lock);
if (err)
goto err2;
}
if (mask & IB_SRQ_LIMIT)
srq->limit = attr->srq_limit;
return 0;
err2:
rxe_queue_cleanup(q);
srq->rq.queue = NULL;
return err;
}
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