From patchwork Tue May 24 08:56:10 2022 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Long Li X-Patchwork-Id: 12859862 X-Patchwork-Delegate: jgg@ziepe.ca Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by smtp.lore.kernel.org (Postfix) with ESMTP id 924C3C4167E for ; Tue, 24 May 2022 08:56:47 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S234350AbiEXI4q (ORCPT ); Tue, 24 May 2022 04:56:46 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:60218 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S234157AbiEXI4f (ORCPT ); Tue, 24 May 2022 04:56:35 -0400 Received: from linux.microsoft.com (linux.microsoft.com [13.77.154.182]) by lindbergh.monkeyblade.net (Postfix) with ESMTP id 0A13472E02; Tue, 24 May 2022 01:56:34 -0700 (PDT) Received: by linux.microsoft.com (Postfix, from userid 1004) id D822520B895E; Tue, 24 May 2022 01:56:33 -0700 (PDT) DKIM-Filter: OpenDKIM Filter v2.11.0 linux.microsoft.com D822520B895E DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=linuxonhyperv.com; s=default; t=1653382593; bh=jGlFFUQbS795R2dpHb7MTDEh4uGqBijvAhcZ+j87f/c=; h=From:To:Cc:Subject:Date:In-Reply-To:References:Reply-To:From; b=Zq3ajQoJAwBAzF8GSkuTcYOr9seSOfKQ/jgShcyA6YvfCjB5C3nb70gvZg1LKRvfx 1rbXmxR7WsJnIS/E0oSpDuwDO54Wa56b0jqnJlebxsuNglPj6MnlewOz2dc9CGfrOu QM3RFIjSc6/L0BZxjUPB9c4HKt2gjDwQATJWL6oY= From: longli@linuxonhyperv.com To: "K. Y. Srinivasan" , Haiyang Zhang , Stephen Hemminger , Wei Liu , Dexuan Cui , "David S. Miller" , Jakub Kicinski , Paolo Abeni , Jason Gunthorpe , Leon Romanovsky , Ajay Sharma Cc: linux-hyperv@vger.kernel.org, netdev@vger.kernel.org, linux-kernel@vger.kernel.org, linux-rdma@vger.kernel.org, Long Li Subject: [Patch v2 10/12] net: mana: Define max values for SGL entries Date: Tue, 24 May 2022 01:56:10 -0700 Message-Id: <1653382572-14788-11-git-send-email-longli@linuxonhyperv.com> X-Mailer: git-send-email 1.8.3.1 In-Reply-To: <1653382572-14788-1-git-send-email-longli@linuxonhyperv.com> References: <1653382572-14788-1-git-send-email-longli@linuxonhyperv.com> Reply-To: longli@microsoft.com Precedence: bulk List-ID: X-Mailing-List: linux-rdma@vger.kernel.org From: Long Li The number of maximum SGl entries should be computed from the maximum WQE size for the intended queue type and the corresponding OOB data size. This guarantees the hardware queue can successfully queue requests up to the queue depth exposed to the upper layer. Signed-off-by: Long Li --- drivers/net/ethernet/microsoft/mana/mana_en.c | 2 +- include/net/mana/gdma.h | 7 +++++++ include/net/mana/mana.h | 4 +--- 3 files changed, 9 insertions(+), 4 deletions(-) diff --git a/drivers/net/ethernet/microsoft/mana/mana_en.c b/drivers/net/ethernet/microsoft/mana/mana_en.c index 1cb8bd3b1f53..f3facaee3055 100644 --- a/drivers/net/ethernet/microsoft/mana/mana_en.c +++ b/drivers/net/ethernet/microsoft/mana/mana_en.c @@ -187,7 +187,7 @@ int mana_start_xmit(struct sk_buff *skb, struct net_device *ndev) pkg.wqe_req.client_data_unit = 0; pkg.wqe_req.num_sge = 1 + skb_shinfo(skb)->nr_frags; - WARN_ON_ONCE(pkg.wqe_req.num_sge > 30); + WARN_ON_ONCE(pkg.wqe_req.num_sge > MAX_TX_WQE_SGL_ENTRIES); if (pkg.wqe_req.num_sge <= ARRAY_SIZE(pkg.sgl_array)) { pkg.wqe_req.sgl = pkg.sgl_array; diff --git a/include/net/mana/gdma.h b/include/net/mana/gdma.h index bc8cd9528937..d6a970118f4c 100644 --- a/include/net/mana/gdma.h +++ b/include/net/mana/gdma.h @@ -436,6 +436,13 @@ struct gdma_wqe { #define MAX_TX_WQE_SIZE 512 #define MAX_RX_WQE_SIZE 256 +#define MAX_TX_WQE_SGL_ENTRIES ((GDMA_MAX_SQE_SIZE - \ + sizeof(struct gdma_sge) - INLINE_OOB_SMALL_SIZE) / \ + sizeof(struct gdma_sge)) + +#define MAX_RX_WQE_SGL_ENTRIES ((GDMA_MAX_RQE_SIZE - \ + sizeof(struct gdma_sge)) / sizeof(struct gdma_sge)) + struct gdma_cqe { u32 cqe_data[GDMA_COMP_DATA_SIZE / 4]; diff --git a/include/net/mana/mana.h b/include/net/mana/mana.h index e7719c861395..a58e86b0aebe 100644 --- a/include/net/mana/mana.h +++ b/include/net/mana/mana.h @@ -264,8 +264,6 @@ struct mana_cq { int budget; }; -#define GDMA_MAX_RQE_SGES 15 - struct mana_recv_buf_oob { /* A valid GDMA work request representing the data buffer. */ struct gdma_wqe_request wqe_req; @@ -275,7 +273,7 @@ struct mana_recv_buf_oob { /* SGL of the buffer going to be sent has part of the work request. */ u32 num_sge; - struct gdma_sge sgl[GDMA_MAX_RQE_SGES]; + struct gdma_sge sgl[MAX_RX_WQE_SGL_ENTRIES]; /* Required to store the result of mana_gd_post_work_request. * gdma_posted_wqe_info.wqe_size_in_bu is required for progressing the