From patchwork Fri Jul 1 13:18:44 2011 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Robert Pearson X-Patchwork-Id: 938882 Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by demeter1.kernel.org (8.14.4/8.14.4) with ESMTP id p61LTcRr014702 for ; Fri, 1 Jul 2011 21:50:59 GMT Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1757388Ab1GAVOA (ORCPT ); Fri, 1 Jul 2011 17:14:00 -0400 Received: from cdptpa-bc-oedgelb.mail.rr.com ([75.180.133.32]:58949 "EHLO cdptpa-bc-oedgelb.mail.rr.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1757417Ab1GAVN7 (ORCPT ); Fri, 1 Jul 2011 17:13:59 -0400 X-Greylist: IP, sender and recipient auto-whitelisted, not delayed by milter-greylist-4.2.6 (demeter1.kernel.org [140.211.167.41]); Fri, 01 Jul 2011 21:50:59 +0000 (UTC) X-Greylist: delayed 300 seconds by postgrey-1.27 at vger.kernel.org; Fri, 01 Jul 2011 17:13:31 EDT Received: from cdptpa-bc-oedgelb.mail.rr.com ([10.127.134.103]) by cdptpa-bc-qmta02.mail.rr.com with ESMTP id <20110701211001117.IHAC4903@cdptpa-bc-qmta02.mail.rr.com> for ; Fri, 1 Jul 2011 21:10:01 +0000 Authentication-Results: cdptpa-bc-oedgelb.mail.rr.com smtp.user=fzago@systemfabricworks.com; auth=pass (PLAIN) X-Authority-Analysis: v=1.1 cv=40Z/dbZBr1wgzPkGSf8y7qdCkiWp+M7NvixVUiz+qMg= c=1 sm=0 a=hAzdGUM1iB0A:10 a=ozIaqLvjkoIA:10 a=DCwX0kaxZCiV3mmbfDr8nQ==:17 a=YORvzBCaAAAA:8 a=bC7xisPkAAAA:8 a=XpVm3YCN22KDAT4HO8wA:9 a=GsuncA5B7VoWBNbFV4EA:7 a=QLxd5cu_Zb8A:10 a=VV2__AUApEoA:10 a=eH_B53jIP-TqNI2D:21 a=M1GF9WGAr1-0mY_H:21 a=DCwX0kaxZCiV3mmbfDr8nQ==:117 X-Cloudmark-Score: 0 X-Originating-IP: 67.79.195.91 Received: from [67.79.195.91] ([67.79.195.91:49546] helo=[10.0.2.91]) by cdptpa-bc-oedge02.mail.rr.com (envelope-from ) (ecelerity 2.2.3.46 r()) with ESMTPA id 8C/08-12017-D573E0E4; Fri, 01 Jul 2011 21:08:45 +0000 Message-Id: <20110701132201.807735406@systemfabricworks.com> References: <20110701131821.928693424@systemfabricworks.com> User-Agent: quilt/0.46-1 Date: Fri, 01 Jul 2011 08:18:44 -0500 From: rpearson@systemfabricworks.com To: linux-rdma@vger.kernel.org Cc: Bob Pearson Subject: [patch 23/44] rxe_cq.c Content-Disposition: inline; filename=patch23 Sender: linux-rdma-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-rdma@vger.kernel.org Completion queue implementation details. Signed-off-by: Bob Pearson --- drivers/infiniband/hw/rxe/rxe_cq.c | 178 +++++++++++++++++++++++++++++++++++++ 1 file changed, 178 insertions(+) Index: infiniband/drivers/infiniband/hw/rxe/rxe_cq.c =================================================================== --- /dev/null +++ infiniband/drivers/infiniband/hw/rxe/rxe_cq.c @@ -0,0 +1,178 @@ +/* + * Copyright (c) 2009-2011 Mellanox Technologies Ltd. All rights reserved. + * Copyright (c) 2009-2011 System Fabric Works, Inc. All rights reserved. + * + * This software is available to you under a choice of one of two + * licenses. You may choose to be licensed under the terms of the GNU + * General Public License (GPL) Version 2, available from the file + * COPYING in the main directory of this source tree, or the + * OpenIB.org BSD license below: + * + * 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. + * + * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, + * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF + * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND + * NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS + * BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN + * ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN + * CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE + * SOFTWARE. + */ + +/* cq implementation details */ + +#include "rxe.h" +#include "rxe_queue.h" +#include "rxe_cq.h" +#include "rxe_mmap.h" + +int rxe_cq_chk_attr(struct rxe_dev *rxe, struct rxe_cq *cq, + int cqe, int comp_vector, struct ib_udata *udata) +{ + int count; + + if (cqe <= 0) { + pr_warn("cqe(%d) <= 0\n", cqe); + goto err1; + } + + if (cqe > rxe->attr.max_cqe) { + pr_warn("cqe(%d) > max_cqe(%d)\n", + cqe, rxe->attr.max_cqe); + goto err1; + } + + if (cq) { + count = queue_count(cq->queue); + if (cqe < count) { + pr_warn("cqe(%d) < current # elements in queue (%d)", + cqe, count); + goto err1; + } + } + + return 0; + +err1: + return -EINVAL; +} + +static void rxe_send_complete(unsigned long data) +{ + struct rxe_cq *cq = (struct rxe_cq *)data; + + while (1) { + u8 notify = cq->notify; + + cq->ibcq.comp_handler(&cq->ibcq, cq->ibcq.cq_context); + + /* See if anything was added to the CQ during the + * comp_handler call. If so, go around again because we + * won't be rescheduled. + * XXX: is there a race on enqueue right after this test + * but before we're out? */ + if (notify == cq->notify) + return; + } +} + +int rxe_cq_from_init(struct rxe_dev *rxe, struct rxe_cq *cq, int cqe, + int comp_vector, struct ib_ucontext *context, + struct ib_udata *udata) +{ + int err; + + cq->queue = rxe_queue_init(rxe, (unsigned int *)&cqe, + sizeof(struct rxe_cqe)); + if (!cq->queue) { + pr_warn("unable to create cq\n"); + return -ENOMEM; + } + + err = do_mmap_info(rxe, udata, 0, context, cq->queue->buf, + cq->queue->buf_size, &cq->queue->ip); + if (err) { + vfree(cq->queue->buf); + kfree(cq->queue); + } + + if (udata) + cq->is_user = 1; + + tasklet_init(&cq->comp_task, rxe_send_complete, (unsigned long)cq); + + spin_lock_init(&cq->cq_lock); + cq->ibcq.cqe = cqe; + return 0; +} + +int rxe_cq_resize_queue(struct rxe_cq *cq, int cqe, struct ib_udata *udata) +{ + int err; + + err = rxe_queue_resize(cq->queue, (unsigned int *)&cqe, + sizeof(struct rxe_cqe), + cq->queue->ip ? cq->queue->ip->context : NULL, + udata, NULL, &cq->cq_lock); + if (!err) + cq->ibcq.cqe = cqe; + + return err; +} + +int rxe_cq_post(struct rxe_cq *cq, struct rxe_cqe *cqe, int solicited) +{ + struct ib_event ev; + unsigned long flags; + + spin_lock_irqsave(&cq->cq_lock, flags); + + if (unlikely(queue_full(cq->queue))) { + spin_unlock_irqrestore(&cq->cq_lock, flags); + if (cq->ibcq.event_handler) { + ev.device = cq->ibcq.device; + ev.element.cq = &cq->ibcq; + ev.event = IB_EVENT_CQ_ERR; + cq->ibcq.event_handler(&ev, cq->ibcq.cq_context); + } + + return -EBUSY; + } + + memcpy(producer_addr(cq->queue), cqe, sizeof(*cqe)); + + /* make sure all changes to the CQ are written before + we update the producer pointer */ + wmb(); + + advance_producer(cq->queue); + spin_unlock_irqrestore(&cq->cq_lock, flags); + + if ((cq->notify == IB_CQ_NEXT_COMP) || + (cq->notify == IB_CQ_SOLICITED && solicited)) { + cq->notify++; + tasklet_schedule(&cq->comp_task); + } + + return 0; +} + +void rxe_cq_cleanup(void *arg) +{ + struct rxe_cq *cq = arg; + + if (cq->queue) + rxe_queue_cleanup(cq->queue); +}