From mboxrd@z Thu Jan 1 00:00:00 1970 Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.remote-ip=13.77.154.182 ARC-Seal: i=1; d=subspace.kernel.org; s=arc20261015; a=rsa-sha256; cv=none; t=1793704665; b=QAA15TZwGZbASg4S6yg/boDPbYAmOJhtIBlnTd7toL6QdB8j9Ikt3g+MzclurKyxyITo pvrFsOlFFgkdhlboB+XMLVjSVj48yOytSwjhZxfG4orV4m48Txf76iOudo6BhEY5Ka0fp nblksa6ry/1WgfxzMNsnDHZgfU5mAFhPn8vy/GwfOhkrM3kYwkRmbvNP/tFlqz2Y3UlnS dFcReP3Wc2O8UeH+UlUvkBfb7JAlv1OM8r8RQ2VBatu4UHIX1jyJ5cz5LkMydkhf2znX8 oTBV0w2GlksaWFhiZO1rQypAieo/yTxub6ZW6xKGD/h8HV80ihtOdyKLn4RySlzbHvA== ARC-Message-Signature: i=1; d=subspace.kernel.org; s=arc20261015; a=rsa-sha256; c=relaxed/relaxed; t=1793704665; h=DMARC-Filter:Received:DKIM-Filter:DKIM-Signature:From:To:Cc:Subject: Date:Message-ID:X-Mailer:In-Reply-To:References:MIME-Version: Content-Transfer-Encoding; bh=rtAWr8aLJJGbLMkAW/QfAjNkIGwj00v3ffiqGlnvDJI=; b=W9j+0OpFcJf7CfQ4u1zLr0YxUlkiZRNFIRXbYdPP2WAhBy5u/umsH/3iyElMYqUjBfX5 mwg6RprdKwaVCla16W1RKzS8yO8XC3XR43lNtWAgMfMSsDAOiHEsS/GeSrk6Jp8QqVxJJ dbV/8ZxoRCrFmNKeeCf/I+hcuFldo3pG5+jbQWwmGC/D8hyfbNk4N3cO7/KeJgu61DKHR Vc8ZjxOJ4k5GXxTCtHaI4gvWu1xKOgNGpD7mv//Gb4ctLPIJDQo3spOdte0qUAn6IxcjS K5spZ3CBYWfr5vRxjzL2tDVzLvF9d9Lg8BHSWnTLsHjdDyc3EbGethi2y4REXvsYjkw== ARC-Authentication-Results: i=1; smtp.subspace.kernel.org; dmarc=pass header.from=linux.microsoft.com; spf=pass smtp.mailfrom=linux.microsoft.com; dkim=pass header.d=linux.microsoft.com header.i=@linux.microsoft.com header.a=rsa-sha256 header.s=default header.b=PHzXZrac; arc=none smtp.remote-ip=13.77.154.182 Received: from linux.microsoft.com (linux.microsoft.com [13.77.154.182]) by smtp.subspace.kernel.org (Postfix) with ESMTP id A6A8D606D81F; Tue, 3 Nov 2026 11:17:44 +0000 (UTC) DMARC-Filter: OpenDMARC Filter v1.4.2 smtp.subspace.kernel.org A6A8D606D81F Authentication-Results: smtp.subspace.kernel.org; dmarc=pass (p=none dis=none) header.from=linux.microsoft.com Authentication-Results: smtp.subspace.kernel.org; spf=pass smtp.mailfrom=linux.microsoft.com Authentication-Results: smtp.subspace.kernel.org; dkim=pass (1024-bit key, unprotected) header.d=linux.microsoft.com header.i=@linux.microsoft.com header.a=rsa-sha256 header.s=default header.b=PHzXZrac Received: by linux.microsoft.com (Postfix, from userid 1186) id 80C5020B716B; Tue, 3 Nov 2026 03:17:29 -0800 (PST) DKIM-Filter: OpenDKIM Filter v2.11.0 linux.microsoft.com 80C5020B716B DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=linux.microsoft.com; s=default; t=1793704649; bh=rtAWr8aLJJGbLMkAW/QfAjNkIGwj00v3ffiqGlnvDJI=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=PHzXZracq/FACEYGrjwsNKh1FO1ZH+KKLlnz8zCoIbFnCoLt1nu1RO/9ZmVFEX4AV Lt3kfhaO9bzdapPUj3I3WsG+b1hljMQvxj7vOsZnRfUZN2/QdOZNHEXpAZyaeu0l3n ktQsLrpqZ8o609CFxg6mpu4EXo7mZ1TlQxIYR/sQ= From: Konstantin Taranov To: kotaranov@microsoft.com, snsanghvi@microsoft.com, longli@microsoft.com, jgg@ziepe.ca, leon@kernel.org Cc: linux-rdma@vger.kernel.org, linux-kernel@vger.kernel.org Subject: [PATCH rdma-next v8 5/9] RDMA/mana_ib: Post receive WRs on kernel RC QPs Date: Tue, 3 Nov 2026 03:17:25 -0800 Message-ID: <20261103111729.729886-6-kotaranov@linux.microsoft.com> X-Mailer: git-send-email 2.43.7 In-Reply-To: <20261103111729.729886-1-kotaranov@linux.microsoft.com> References: <20261103111729.729886-1-kotaranov@linux.microsoft.com> X-Mailing-List: linux-kernel@vger.kernel.org List-Id: List-Post: List-Help: List-Subscribe: List-Unsubscribe: List-Owner: Precedence: list MIME-Version: 1.0 Content-Transfer-Encoding: 8bit From: Konstantin Taranov Implement receive request posting for RC QPs. When posting a batch of WRs, ring the doorbell periodically to prevent the u8 counter from overflowing. Signed-off-by: Konstantin Taranov --- drivers/infiniband/hw/mana/wr.c | 37 +++++++++++++++++++++++++++++++++ 1 file changed, 37 insertions(+) diff --git a/drivers/infiniband/hw/mana/wr.c b/drivers/infiniband/hw/mana/wr.c index 250d673f58f2..5d42af91fce4 100644 --- a/drivers/infiniband/hw/mana/wr.c +++ b/drivers/infiniband/hw/mana/wr.c @@ -70,6 +70,41 @@ static int mana_ib_post_recv_ud(struct mana_ib_qp *qp, const struct ib_recv_wr * return err; } +static int mana_ib_post_recv_rc(struct mana_ib_qp *qp, const struct ib_recv_wr *wr, + const struct ib_recv_wr **bad_wr) +{ + struct mana_ib_dev *mdev = container_of(qp->ibqp.device, struct mana_ib_dev, ib_dev); + struct mana_ib_queue *ib_rq = mana_qp_get_rq(qp); + unsigned long flags; + u8 wqe_cnt = 0; + int err = 0; + + spin_lock_irqsave(&qp->rq_lock, flags); + + for (; wr; wr = wr->next) { + err = mana_ib_post_rq(qp, wr); + if (unlikely(err)) { + *bad_wr = wr; + break; + } + wqe_cnt++; + if (wqe_cnt == 0xFF) { + mana_gd_wq_ring_doorbell_ext(mdev_to_gc(mdev), ib_rq->kmem, + ib_rq->kmem->head * GDMA_WQE_BU_SIZE, + wqe_cnt, 0); + wqe_cnt = 0; + } + } + + if (wqe_cnt) + mana_gd_wq_ring_doorbell_ext(mdev_to_gc(mdev), ib_rq->kmem, + ib_rq->kmem->head * GDMA_WQE_BU_SIZE, + wqe_cnt, 0); + + spin_unlock_irqrestore(&qp->rq_lock, flags); + return err; +} + int mana_ib_post_recv(struct ib_qp *ibqp, const struct ib_recv_wr *wr, const struct ib_recv_wr **bad_wr) { @@ -79,6 +114,8 @@ int mana_ib_post_recv(struct ib_qp *ibqp, const struct ib_recv_wr *wr, case IB_QPT_UD: case IB_QPT_GSI: return mana_ib_post_recv_ud(qp, wr, bad_wr); + case IB_QPT_RC: + return mana_ib_post_recv_rc(qp, wr, bad_wr); default: /* Unsupported QP type */ *bad_wr = wr; -- 2.43.0