diff options
Diffstat (limited to 'drivers/infiniband/sw/rxe/rxe_srq.c')
| -rw-r--r-- | drivers/infiniband/sw/rxe/rxe_srq.c | 187 |
1 files changed, 187 insertions, 0 deletions
diff --git a/drivers/infiniband/sw/rxe/rxe_srq.c b/drivers/infiniband/sw/rxe/rxe_srq.c new file mode 100644 index 000000000..02b39498c --- /dev/null +++ b/drivers/infiniband/sw/rxe/rxe_srq.c @@ -0,0 +1,187 @@ +// 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_queue.h" + +int rxe_srq_chk_init(struct rxe_dev *rxe, struct ib_srq_init_attr *init) +{ + struct ib_srq_attr *attr = &init->attr; + + 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 (attr->max_wr < RXE_MIN_SRQ_WR) + attr->max_wr = RXE_MIN_SRQ_WR; + + 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; + enum queue_type type; + + srq->ibsrq.event_handler = init->event_handler; + srq->ibsrq.srq_context = init->srq_context; + srq->limit = init->attr.srq_limit; + srq->srq_num = srq->elem.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); + + type = QUEUE_TYPE_FROM_CLIENT; + q = rxe_queue_init(rxe, &srq->rq.max_wr, srq_wqe_size, type); + 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_chk_attr(struct rxe_dev *rxe, struct rxe_srq *srq, + struct ib_srq_attr *attr, enum ib_srq_attr_mask mask) +{ + if (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->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 (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; + } + } + + return 0; + +err1: + return -EINVAL; +} + +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; +} + +void rxe_srq_cleanup(struct rxe_pool_elem *elem) +{ + struct rxe_srq *srq = container_of(elem, typeof(*srq), elem); + + if (srq->pd) + rxe_put(srq->pd); + + if (srq->rq.queue) + rxe_queue_cleanup(srq->rq.queue); +} |