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 ib_udata *udata)
{
int err;
struct rxe_queue *q = srq->rq.queue;
struct mminfo mi = { .offset = 1, .size = 0};
if (mask & IB_SRQ_MAX_WR) {
/* Check that we can write the mminfo struct to user space */
if (udata && udata->inlen >= sizeof(__u64)) {
__u64 mi_addr;
/* Get address of user space mminfo struct */
err = ib_copy_from_udata(&mi_addr, udata,
sizeof(mi_addr));
if (err)
goto err1;
udata->outbuf = (void __user *)(unsigned long)mi_addr;
udata->outlen = sizeof(mi);
if (!access_ok(VERIFY_WRITE,
(void __user *)udata->outbuf,
udata->outlen)) {
err = -EFAULT;
goto err1;
}
}
err = rxe_queue_resize(q, &attr->max_wr,
rcv_wqe_size(srq->rq.max_sge),
srq->rq.queue->ip ?
srq->rq.queue->ip->context :
NULL,
udata, &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;
err1:
return err;
}
static int rxe_qp_init_resp(struct rxe_dev *rxe, struct rxe_qp *qp,
struct ib_qp_init_attr *init,
struct ib_ucontext *context, struct ib_udata *udata)
{
int err;
int wqe_size;
if (!qp->srq) {
qp->rq.max_wr = init->cap.max_recv_wr;
qp->rq.max_sge = init->cap.max_recv_sge;
wqe_size = rcv_wqe_size(qp->rq.max_sge);
pr_debug("qp#%d max_wr = %d, max_sge = %d, wqe_size = %d\n",
qp_num(qp), qp->rq.max_wr, qp->rq.max_sge, wqe_size);
qp->rq.queue = rxe_queue_init(rxe,
&qp->rq.max_wr,
wqe_size);
if (!qp->rq.queue)
return -ENOMEM;
err = do_mmap_info(rxe, udata, false, context,
qp->rq.queue->buf,
qp->rq.queue->buf_size,
&qp->rq.queue->ip);
if (err) {
kvfree(qp->rq.queue->buf);
kfree(qp->rq.queue);
return err;
}
}
spin_lock_init(&qp->rq.producer_lock);
spin_lock_init(&qp->rq.consumer_lock);
skb_queue_head_init(&qp->resp_pkts);
rxe_init_task(rxe, &qp->resp.task, qp,
rxe_responder, "resp");
qp->resp.opcode = OPCODE_NONE;
qp->resp.msn = 0;
qp->resp.state = QP_STATE_RESET;
return 0;
}
int rxe_srq_from_init(struct rxe_dev *rxe, struct rxe_srq *srq,
struct ib_srq_init_attr *init,
struct ib_ucontext *context, struct ib_udata *udata)
{
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, udata, false, context, q->buf,
q->buf_size, &q->ip);
if (err)
return err;
if (udata && udata->outlen >= sizeof(struct mminfo) + sizeof(u32)) {
if (copy_to_user(udata->outbuf + sizeof(struct mminfo),
&srq->srq_num, sizeof(u32)))
return -EFAULT;
}
return 0;
}
