From patchwork Mon Mar 13 22:50:59 2023 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Serge Semin X-Patchwork-Id: 13173460 X-Patchwork-Delegate: kuba@kernel.org 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 59570C7618B for ; Mon, 13 Mar 2023 23:00:48 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S230164AbjCMXA2 (ORCPT ); Mon, 13 Mar 2023 19:00:28 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:46526 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S229957AbjCMXAW (ORCPT ); Mon, 13 Mar 2023 19:00:22 -0400 Received: from post.baikalelectronics.com (post.baikalelectronics.com [213.79.110.86]) by lindbergh.monkeyblade.net (Postfix) with ESMTP id E40658691; Mon, 13 Mar 2023 15:59:48 -0700 (PDT) Received: from post.baikalelectronics.com (localhost.localdomain [127.0.0.1]) by post.baikalelectronics.com (Proxmox) with ESMTP id 231BCE0EBE; Tue, 14 Mar 2023 01:51:26 +0300 (MSK) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d= baikalelectronics.ru; h=cc:cc:content-transfer-encoding :content-type:content-type:date:from:from:in-reply-to:message-id :mime-version:references:reply-to:subject:subject:to:to; s=post; bh=7MVrtnm6qrHIhyMF9F8ZCjZqai+ZJoeGYKX8whtHDxE=; b=RzpF8eyD0bFT LpgQVaXR27miDGoRlb2j8Q2Ima/XWvMj0j2Ovxl2X9H9aHQYRms2xMlDqYPDOcL6 /DVYsVbbfKl1LruGW7wf+dkXssg99k8UDCidTJAURYjXXpHNkJgLvSBg/pRK4JFm aI9ZkSDZ5DX4fmfbZsUsSYYYNZiAxqs= Received: from mail.baikal.int (mail.baikal.int [192.168.51.25]) by post.baikalelectronics.com (Proxmox) with ESMTP id 00EF5E0E6A; Tue, 14 Mar 2023 01:51:26 +0300 (MSK) Received: from localhost (10.8.30.10) by mail (192.168.51.25) with Microsoft SMTP Server (TLS) id 15.0.1395.4; Tue, 14 Mar 2023 01:51:25 +0300 From: Serge Semin To: Giuseppe Cavallaro , Alexandre Torgue , Jose Abreu , "David S. Miller" , Eric Dumazet , Jakub Kicinski , Paolo Abeni , Maxime Coquelin , Rob Herring , Krzysztof Kozlowski CC: Serge Semin , Serge Semin , Alexey Malahov , Pavel Parkhomenko , Christian Marangi , Richard Cochran , Biao Huang , Yang Yingliang , , , , , , Alexandre Torgue Subject: [PATCH net-next 12/16] dt-bindings: net: dwmac: Add MTL Tx Queue properties constraints Date: Tue, 14 Mar 2023 01:50:59 +0300 Message-ID: <20230313225103.30512-13-Sergey.Semin@baikalelectronics.ru> X-Mailer: git-send-email 2.39.2 In-Reply-To: <20230313225103.30512-1-Sergey.Semin@baikalelectronics.ru> References: <20230313225103.30512-1-Sergey.Semin@baikalelectronics.ru> MIME-Version: 1.0 X-Originating-IP: [10.8.30.10] X-ClientProxiedBy: MAIL.baikal.int (192.168.51.25) To mail (192.168.51.25) Precedence: bulk List-ID: X-Mailing-List: netdev@vger.kernel.org X-Patchwork-Delegate: kuba@kernel.org Currently none of the MTL Tx Queues QoS-related DT-properties have been equipped with the proper constraints meanwhile they can be specified at least based on the corresponding CSR field sizes or the DW (x|xG)MAC IP-core synthesize parameter constraints. Let's do that: + snps,tx-queues-to-use - number of Tx queues to utilise is limited with a number of available queues. DW MAC/GMAC: no queues, DW Eth QoS: <= 8, DW xGMAC: <= 16. + snps,weight - Tx Queue/Traffic Class quantum/weight utilised depending on enabled algorithm for the Data Center Bridging feature: DWRR (up to 0x1312D0 bytes to add to credit) or WFQ (up to 0x3FFF - least bandwidth) or WFQ (up to 0x64). DW MAC/GMAC: no queues, DW Eth QoS: <= 0x1312D0, DW xGMAC: <= 0x1312D0. + snps,send_slope - Tx Queue/Traffic Class Send-Slope credit value subtracted from the accumulated credit for the Audio/Video bridging feature (CBS algorithm, bits per cycle scaled up by 1,024). DW MAC/GMAC: no queues, DW Eth QoS: <= 0x2000, DW xGMAC: <= 0x3FFF. + snps,idle_slope - same meaning as snps,send_slope except it's determines the Idle-Slope credit of CBS algorithm. DW MAC/GMAC: no queues, DW Eth QoS: <= 0x2000, DW xGMAC: <= 0x8000. + snps,high_credit/snps,low_credit - maximum and minimum values accumulated in the credit for the Audio/Video bridging feature (CBS algorithm, bits scaled up by 1,024). DW MAC/GMAC: no queues, DW Eth QoS: <= 0x1FFFFFFF, DW xGMAC: <= 0x1FFFFFFF. + snps,priority - Tx Queue/Traffic Class priority (enabled by the PFC-packets) limits determined by the VLAN tag PRI field width (it's 7). DW MAC/GMAC: no queues, DW Eth QoS: 0xff, DW xGMAC: 0xff. Since the constraints vary for different IP-cores and the DT-schema is common for all of them the least restrictive values are chosen. The info above can be used for the IP-core specific DT-schemas if anybody ever is bothered with one to create. Signed-off-by: Serge Semin --- .../bindings/net/snps,dwmac-generic.yaml | 2 +- .../devicetree/bindings/net/snps,dwmac.yaml | 24 ++++++++++++++++++- 2 files changed, 24 insertions(+), 2 deletions(-) diff --git a/Documentation/devicetree/bindings/net/snps,dwmac-generic.yaml b/Documentation/devicetree/bindings/net/snps,dwmac-generic.yaml index ae740a1ab213..2974af79511d 100644 --- a/Documentation/devicetree/bindings/net/snps,dwmac-generic.yaml +++ b/Documentation/devicetree/bindings/net/snps,dwmac-generic.yaml @@ -137,7 +137,7 @@ examples: snps,send_slope = <0x1000>; snps,idle_slope = <0x1000>; snps,high_credit = <0x3E800>; - snps,low_credit = <0xFFC18000>; + snps,low_credit = <0x1FC18000>; snps,priority = <0x1>; }; }; diff --git a/Documentation/devicetree/bindings/net/snps,dwmac.yaml b/Documentation/devicetree/bindings/net/snps,dwmac.yaml index e5662b1498b7..2ebf7995426b 100644 --- a/Documentation/devicetree/bindings/net/snps,dwmac.yaml +++ b/Documentation/devicetree/bindings/net/snps,dwmac.yaml @@ -250,6 +250,10 @@ properties: snps,tx-queues-to-use: $ref: /schemas/types.yaml#/definitions/uint32 description: number of TX queues to be used in the driver + default: 1 + minimum: 1 + maximum: 16 + snps,tx-sched-wrr: type: boolean description: Weighted Round Robin @@ -296,13 +300,16 @@ properties: snps,tx-sched-wfq: false snps,tx-sched-dwrr: false patternProperties: - "^queue[0-9]$": + "^queue([0-9]|1[0-5])$": description: Each subnode represents a queue. type: object properties: snps,weight: $ref: /schemas/types.yaml#/definitions/uint32 description: TX queue weight (if using a DCB weight algorithm) + minimum: 0 + maximum: 0x1312D0 + snps,dcb-algorithm: type: boolean description: TX queue will be working in DCB @@ -315,15 +322,27 @@ properties: snps,send_slope: $ref: /schemas/types.yaml#/definitions/uint32 description: enable Low Power Interface + minimum: 0 + maximum: 0x3FFF + snps,idle_slope: $ref: /schemas/types.yaml#/definitions/uint32 description: unlock on WoL + minimum: 0 + maximum: 0x8000 + snps,high_credit: $ref: /schemas/types.yaml#/definitions/uint32 description: max write outstanding req. limit + minimum: 0 + maximum: 0x1FFFFFFF + snps,low_credit: $ref: /schemas/types.yaml#/definitions/uint32 description: max read outstanding req. limit + minimum: 0 + maximum: 0x1FFFFFFF + snps,priority: $ref: /schemas/types.yaml#/definitions/uint32 description: @@ -331,6 +350,9 @@ properties: When a PFC frame is received with priorities matching the bitmask, the queue is blocked from transmitting for the pause time specified in the PFC frame. + minimum: 0 + maximum: 0xFF + allOf: - if: required: