From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from linux.microsoft.com (linux.microsoft.com [13.77.154.182]) by smtp.subspace.kernel.org (Postfix) with ESMTP id 8BF0E4BD371; Wed, 7 Oct 2026 15:34:33 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=13.77.154.182 ARC-Seal:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1791387279; cv=none; b=KaUagKCj3+Wxx6fvNYt4HlsMO5P/uEdFuOmcIkINsjAfu+kJesMny6LtLWme0SL863GD2Wbldm4GdKXGJWQcMlcEbz6j8lQVY68TKf2pH70WEdwHo+XjZJU/QWpH6GuZ32pzNZjcOtbz8R73WvpdhblwWJkuEVLVM5xwkuCtXqU= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1791387279; c=relaxed/simple; bh=sHxFHb/duJvwH48zg5TwF48rZ5LMvUfG+khn71M3JNo=; h=From:To:Cc:Subject:Date:Message-ID:In-Reply-To:References: MIME-Version; b=r9nggMwH2fNBRYfNUUJolSHGYTRlQCInCtoglHmhoII07GmlQIWSJWo/OhWXHUDa0w9Q3O5ABx5y0fLzkZtN0FBG33Z46dYBs/9fyd2hlIhLIdP4hZ+YEqWGMQanuJkWqqyXeVHUc5gyUp+zzlPjPM79pv0peni1r6Eq8cPcDHQ= ARC-Authentication-Results:i=1; smtp.subspace.kernel.org; dmarc=pass (p=none dis=none) header.from=linux.microsoft.com; spf=pass smtp.mailfrom=linux.microsoft.com; dkim=pass (1024-bit key) header.d=linux.microsoft.com header.i=@linux.microsoft.com header.b=cLakZswv; arc=none smtp.client-ip=13.77.154.182 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) header.d=linux.microsoft.com header.i=@linux.microsoft.com header.b="cLakZswv" Received: by linux.microsoft.com (Postfix, from userid 1186) id 10E0220B716C; Wed, 7 Oct 2026 08:33:30 -0700 (PDT) DKIM-Filter: OpenDKIM Filter v2.11.0 linux.microsoft.com 10E0220B716C DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=linux.microsoft.com; s=default; t=1791387211; bh=rtAWr8aLJJGbLMkAW/QfAjNkIGwj00v3ffiqGlnvDJI=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=cLakZswv/prvRiZgef2/zhxkt9212hlpT2WGw98infqfWak3yi5Z1jRY6nwvA0igi iVF8SdiRbxsZM3TLkjE5Uo/iiab8kzo+E1vt9UiTAO7PzDLypvZh/SBzqdSFc2UUSm Rt6DdCH1MRoVgChs98NoQR3NihUgNX0X9LvLoCR8= 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 v3 05/10] RDMA/mana_ib: Post receive WRs on kernel RC QPs Date: Wed, 7 Oct 2026 08:33:25 -0700 Message-ID: <20261007153330.2979799-6-kotaranov@linux.microsoft.com> X-Mailer: git-send-email 2.43.7 In-Reply-To: <20261007153330.2979799-1-kotaranov@linux.microsoft.com> References: <20261007153330.2979799-1-kotaranov@linux.microsoft.com> Precedence: bulk X-Mailing-List: linux-kernel@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: 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