186 lines
4.6 KiB
C
186 lines
4.6 KiB
C
/*
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* Copyright (c) 2016 Mellanox Technologies Ltd. All rights reserved.
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* Copyright (c) 2015 System Fabric Works, Inc. All rights reserved.
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*
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* This software is available to you under a choice of one of two
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* licenses. You may choose to be licensed under the terms of the GNU
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* General Public License (GPL) Version 2, available from the file
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* COPYING in the main directory of this source tree, or the
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* OpenIB.org BSD license below:
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*
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* Redistribution and use in source and binary forms, with or
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* without modification, are permitted provided that the following
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* conditions are met:
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*
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* - Redistributions of source code must retain the above
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* copyright notice, this list of conditions and the following
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* disclaimer.
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*
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* - Redistributions in binary form must reproduce the above
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* copyright notice, this list of conditions and the following
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* disclaimer in the documentation and/or other materials
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* provided with the distribution.
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*
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* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
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* EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
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* MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
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* NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS
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* BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN
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* ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
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* CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
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* SOFTWARE.
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*/
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#include <linux/vmalloc.h>
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#include "rxe.h"
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#include "rxe_loc.h"
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#include "rxe_queue.h"
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int rxe_cq_chk_attr(struct rxe_dev *rxe, struct rxe_cq *cq,
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int cqe, int comp_vector)
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{
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int count;
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if (cqe <= 0) {
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pr_warn("cqe(%d) <= 0\n", cqe);
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goto err1;
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}
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if (cqe > rxe->attr.max_cqe) {
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pr_warn("cqe(%d) > max_cqe(%d)\n",
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cqe, rxe->attr.max_cqe);
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goto err1;
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}
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if (cq) {
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count = queue_count(cq->queue);
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if (cqe < count) {
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pr_warn("cqe(%d) < current # elements in queue (%d)",
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cqe, count);
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goto err1;
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}
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}
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return 0;
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err1:
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return -EINVAL;
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}
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static void rxe_send_complete(unsigned long data)
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{
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struct rxe_cq *cq = (struct rxe_cq *)data;
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unsigned long flags;
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spin_lock_irqsave(&cq->cq_lock, flags);
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if (cq->is_dying) {
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spin_unlock_irqrestore(&cq->cq_lock, flags);
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return;
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}
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spin_unlock_irqrestore(&cq->cq_lock, flags);
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cq->ibcq.comp_handler(&cq->ibcq, cq->ibcq.cq_context);
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}
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int rxe_cq_from_init(struct rxe_dev *rxe, struct rxe_cq *cq, int cqe,
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int comp_vector, struct ib_ucontext *context,
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struct rxe_create_cq_resp __user *uresp)
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{
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int err;
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cq->queue = rxe_queue_init(rxe, &cqe,
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sizeof(struct rxe_cqe));
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if (!cq->queue) {
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pr_warn("unable to create cq\n");
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return -ENOMEM;
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}
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err = do_mmap_info(rxe, uresp ? &uresp->mi : NULL, context,
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cq->queue->buf, cq->queue->buf_size, &cq->queue->ip);
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if (err) {
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vfree(cq->queue->buf);
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kfree(cq->queue);
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return err;
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}
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if (uresp)
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cq->is_user = 1;
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cq->is_dying = false;
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tasklet_init(&cq->comp_task, rxe_send_complete, (unsigned long)cq);
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spin_lock_init(&cq->cq_lock);
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cq->ibcq.cqe = cqe;
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return 0;
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}
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int rxe_cq_resize_queue(struct rxe_cq *cq, int cqe,
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struct rxe_resize_cq_resp __user *uresp)
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{
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int err;
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err = rxe_queue_resize(cq->queue, (unsigned int *)&cqe,
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sizeof(struct rxe_cqe),
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cq->queue->ip ? cq->queue->ip->context : NULL,
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uresp ? &uresp->mi : NULL, NULL, &cq->cq_lock);
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if (!err)
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cq->ibcq.cqe = cqe;
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return err;
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}
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int rxe_cq_post(struct rxe_cq *cq, struct rxe_cqe *cqe, int solicited)
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{
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struct ib_event ev;
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unsigned long flags;
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spin_lock_irqsave(&cq->cq_lock, flags);
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if (unlikely(queue_full(cq->queue))) {
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spin_unlock_irqrestore(&cq->cq_lock, flags);
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if (cq->ibcq.event_handler) {
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ev.device = cq->ibcq.device;
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ev.element.cq = &cq->ibcq;
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ev.event = IB_EVENT_CQ_ERR;
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cq->ibcq.event_handler(&ev, cq->ibcq.cq_context);
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}
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return -EBUSY;
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}
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memcpy(producer_addr(cq->queue), cqe, sizeof(*cqe));
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/* make sure all changes to the CQ are written before we update the
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* producer pointer
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*/
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smp_wmb();
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advance_producer(cq->queue);
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spin_unlock_irqrestore(&cq->cq_lock, flags);
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if ((cq->notify == IB_CQ_NEXT_COMP) ||
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(cq->notify == IB_CQ_SOLICITED && solicited)) {
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cq->notify = 0;
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tasklet_schedule(&cq->comp_task);
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}
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return 0;
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}
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void rxe_cq_disable(struct rxe_cq *cq)
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{
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unsigned long flags;
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spin_lock_irqsave(&cq->cq_lock, flags);
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cq->is_dying = true;
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spin_unlock_irqrestore(&cq->cq_lock, flags);
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}
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void rxe_cq_cleanup(struct rxe_pool_entry *arg)
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{
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struct rxe_cq *cq = container_of(arg, typeof(*cq), pelem);
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if (cq->queue)
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rxe_queue_cleanup(cq->queue);
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}
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