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=1793365252; b=OQBt+q0Kqi+ttPR7ZwxshYpi7TuY34WABUxopOciAe5r3hKKgPWPwST0w9DN3eP2MiZ1 XAvW0pyo5/ehelo6INyePigooIQwauYVR6jj7++kKTPjGcfwSpqBCRGF01sDOXHp1kirx /mx64Blr2Yf7AZCwzxIrhh4rOnJ65e8MFbsT/SMr3QDrN/DqHe568TMxZZqxyUL3TkxO/ BKFoxczYJHcrQNl9BxNIvPV49UN9mTzMTx+sdzEGDNlnoLXTU8ET/MIGYBO5dxHTQNY/z a10wUsu/x4d6oaZf26bJhVQSZupgnfnBptLg89yhw/Zu3EX2YTa024EUA+ffmrJIUHg== ARC-Message-Signature: i=1; d=subspace.kernel.org; s=arc20261015; a=rsa-sha256; c=relaxed/relaxed; t=1793365252; 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=eVNgScdEJMqgBXf2IQviA63S+HkjzbQlDZCl8Ljl/1WQuJBrPlcTtC1bNYqZE0X8SdXt 47uDOiA9WCV4rB62MOSu4hOwbYW9Icshg1l48o7soMNobg41zPSMMuRpbBwYIUA5lnjd4 /iRSCvJMBy37OTEWIbANumawEthX7Lk8oN9SeZdONpltQeMrO82Wpj9PNMAHEsVzTVLCf gBFTni9K/31Yt+h8hYQvi86INK7Kw4dZW99WU+zaPGDkk7pWUWuV9ZX3uGvmvdaluMr5x W8Ph6k6BShJFkmOvZsyaS6ScIzpyupzIbzlaVsNvbAz9clkiTXTlS9q3MlT7uY3tsFA== 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=WHEPM+WJ; 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 87364606A326; Fri, 30 Oct 2026 13:00:52 +0000 (UTC) DMARC-Filter: OpenDMARC Filter v1.4.2 smtp.subspace.kernel.org 87364606A326 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=WHEPM+WJ Received: by linux.microsoft.com (Postfix, from userid 1186) id A525020B716B; Fri, 30 Oct 2026 06:00:38 -0700 (PDT) DKIM-Filter: OpenDKIM Filter v2.11.0 linux.microsoft.com A525020B716B DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=linux.microsoft.com; s=default; t=1793365238; bh=rtAWr8aLJJGbLMkAW/QfAjNkIGwj00v3ffiqGlnvDJI=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=WHEPM+WJrEe3CdIZQv1I6twzKp8T1TWqdb/3kB6ddNtMqlvmpA019/lfpofuHOHEO T1JlU81PdejdnA+lHe0LrPQCitatohyrtx74qv+uYqbnxMFI57WSKeBrAAjWergnb2 fTly0dPL0cJnLhE2qT55FdPpkfi+2n2BYGZGzQqs= 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 v6 05/10] RDMA/mana_ib: Post receive WRs on kernel RC QPs Date: Fri, 30 Oct 2026 06:00:33 -0700 Message-ID: <20261030130038.4040789-6-kotaranov@linux.microsoft.com> X-Mailer: git-send-email 2.43.7 In-Reply-To: <20261030130038.4040789-1-kotaranov@linux.microsoft.com> References: <20261030130038.4040789-1-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