From patchwork Wed Apr 10 09:13:11 2024 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 8bit X-Patchwork-Submitter: =?utf-8?q?Philippe_Mathieu-Daud=C3=A9?= X-Patchwork-Id: 787498 Delivered-To: patch@linaro.org Received: by 2002:adf:fdd2:0:b0:346:15ad:a2a with SMTP id i18csp598542wrs; Wed, 10 Apr 2024 02:16:54 -0700 (PDT) X-Forwarded-Encrypted: i=2; AJvYcCUnNW7Oolas7KNIcC8tFNAbCS7HkZhsAw6W83x8m0zzfrZR2huE8cfpZ+DogR/4bdkxHVAjGkoj/A6sdO12hjsL X-Google-Smtp-Source: AGHT+IGHPxLxTzKBTDToll1gmzq/p+/Ze9Vmh6Rphq7kZZvuwG994RFawks2QTMhMdckIBugxUML X-Received: by 2002:a05:6214:19c8:b0:691:85a2:4434 with SMTP id j8-20020a05621419c800b0069185a24434mr3014931qvc.26.1712740614277; Wed, 10 Apr 2024 02:16:54 -0700 (PDT) ARC-Seal: i=1; a=rsa-sha256; t=1712740614; cv=none; d=google.com; s=arc-20160816; b=FQ+Vtbd1ftZCmcU544D+L1EG6IGf7qS0R3v931h36j/dOiQ7ZCJ7PAnw9CDUJ4twpA D8HcL3HyXDsdAkQ+qNKUZErHJZJsOMpK7Y1L4+BbfMizc7+LwRnJnUZGmtLrAWcYObLF Pju0UzJ+T0dmDleFNiDL+bxyfn3NQq0YYbPAMLIWL3pGaCkA0eYqywqBsOmmQe4uH+5q PryK2p2E+/mBAFvBq+toEcNQZLoZqEyleOZLQMN9eYHgnfvjjGIhE8GbInkqRtkOSMBA r1j04IgNUiiE8jmDWjvkAzZOIbDoVxbci7UHXqyJFZjQ3pCY/3u/NiX6gx8nS+V9jYb1 ohbw== ARC-Message-Signature: i=1; a=rsa-sha256; c=relaxed/relaxed; d=google.com; s=arc-20160816; h=sender:errors-to:list-subscribe:list-help:list-post:list-archive :list-unsubscribe:list-id:precedence:content-transfer-encoding :mime-version:references:in-reply-to:message-id:date:subject:cc:to :from:dkim-signature; bh=X+HfBaogaKesnx0L+UIHNSkZQ9BO28r47IsjVL4QJyA=; fh=IuuhEsqe/ctze71DbWYY1JTF8ckDgBSEjkAyiWWsNPc=; b=HjLCGaSJBV3PiYW53n3xxrAFAs4g7r/k4pOH4eLG2sGa7zfP4HYuaOkDAE1153UV4/ 7sO+xA+GPtBys+BDH/Ix6S13eTV3W2wIJHo6bTyn5odcbi7gQUyhFXdKHn3dlFwlyqbR q12wVbmSFXDEDo96Vwa65g6qIhyUe2wYqBNdAiKCHtC47oOglPHDxcJYApZzP2JW04ui uk7VWGFXh5YrWxqg2mNxaUXjV5eijsz6+qdZPjV//8KE8vQLBHsmOt+LKZWFsdT+q3B1 qhQm2aN43IV/Dp5VL0SGdiVadHmd3YyOYbGMcq3Mhdv+67EjBmyscg0y+GwIr9VSBSsL Emyg==; dara=google.com ARC-Authentication-Results: i=1; mx.google.com; dkim=pass header.i=@linaro.org header.s=google header.b=fziNY459; spf=pass (google.com: domain of qemu-devel-bounces+patch=linaro.org@nongnu.org designates 209.51.188.17 as permitted sender) smtp.mailfrom="qemu-devel-bounces+patch=linaro.org@nongnu.org"; dmarc=pass (p=NONE sp=NONE dis=NONE) header.from=linaro.org Return-Path: Received: from lists.gnu.org (lists.gnu.org. [209.51.188.17]) by mx.google.com with ESMTPS id b6-20020a0ce886000000b006993a8aa349si12086043qvo.404.2024.04.10.02.16.54 for (version=TLS1_2 cipher=ECDHE-ECDSA-CHACHA20-POLY1305 bits=256/256); Wed, 10 Apr 2024 02:16:54 -0700 (PDT) Received-SPF: pass (google.com: domain of qemu-devel-bounces+patch=linaro.org@nongnu.org designates 209.51.188.17 as permitted sender) client-ip=209.51.188.17; Authentication-Results: mx.google.com; dkim=pass header.i=@linaro.org header.s=google header.b=fziNY459; spf=pass (google.com: domain of qemu-devel-bounces+patch=linaro.org@nongnu.org designates 209.51.188.17 as permitted sender) smtp.mailfrom="qemu-devel-bounces+patch=linaro.org@nongnu.org"; dmarc=pass (p=NONE sp=NONE dis=NONE) header.from=linaro.org Received: from localhost ([::1] helo=lists1p.gnu.org) by lists.gnu.org with esmtp (Exim 4.90_1) (envelope-from ) id 1ruU2W-00069U-6j; Wed, 10 Apr 2024 05:14:44 -0400 Received: from eggs.gnu.org ([2001:470:142:3::10]) by lists.gnu.org with esmtps (TLS1.2:ECDHE_RSA_AES_256_GCM_SHA384:256) (Exim 4.90_1) (envelope-from ) id 1ruU2U-00068n-9Z for qemu-devel@nongnu.org; Wed, 10 Apr 2024 05:14:42 -0400 Received: from mail-ej1-x62f.google.com ([2a00:1450:4864:20::62f]) by eggs.gnu.org with esmtps (TLS1.2:ECDHE_RSA_AES_128_GCM_SHA256:128) (Exim 4.90_1) (envelope-from ) id 1ruU2O-0005fJ-In for qemu-devel@nongnu.org; Wed, 10 Apr 2024 05:14:42 -0400 Received: by mail-ej1-x62f.google.com with SMTP id a640c23a62f3a-a47385a4379so1386593066b.0 for ; Wed, 10 Apr 2024 02:14:34 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=linaro.org; s=google; t=1712740473; x=1713345273; darn=nongnu.org; h=content-transfer-encoding:mime-version:references:in-reply-to :message-id:date:subject:cc:to:from:from:to:cc:subject:date :message-id:reply-to; bh=X+HfBaogaKesnx0L+UIHNSkZQ9BO28r47IsjVL4QJyA=; b=fziNY459L/G51xwhYEsRLnfI7vVFdMBeXLPpaBkzs9h+77XeC6PR4vztYGECqOuQA0 kVJ4mrFCOQAvDLmjX0OWvt1b+bNmD9Gijw+2VmcyxO12BpkTGE3epGy2p+oThhX2kICE 6OOfXaC2ZMSAquAhIqMj4H/YSo+YEF4+nu0afR902q2wwgukTkRF0bOcGCreTngK26jA Xq+KsEIi/jqEbFzO5paRKYGM/wiA4X1/X//3FQ8pLTbfbA0wHkOEZ5dIPiVDCzP6TLI6 J0TsYVf36ZW4GnhOenzrTvb26sfctSgqO19hoPvc+3gfwfico9Jvo3KzofIJJ2sBKmvg mwUw== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20230601; t=1712740473; x=1713345273; h=content-transfer-encoding:mime-version:references:in-reply-to :message-id:date:subject:cc:to:from:x-gm-message-state:from:to:cc :subject:date:message-id:reply-to; bh=X+HfBaogaKesnx0L+UIHNSkZQ9BO28r47IsjVL4QJyA=; b=qCy+aoKqpioyQOCzaZQDiXjXJ2ypWdPaYkVCGx1c3LYJMIQzH4tSGY8s4N+fUakrvh JPu7X45LCI2xCHuPPjHf+c3dwAGsQxu2dAVZIuitmds1fvRXENQFph6znK/+G8vpc2Zv Lg3FMZg9O0duZshm+VghMsoMcjI7Ls++gtaLFLnFHvYMxF7oS7m6c96xAXIKMWKChWHX mN1Lz83lEqeuujpeBCKFH/dV8BfO494aAEQub/UkzMYkA1ojreWRjIrTsuZ8lO0JPmmO 88ucL43FN4iz8sCDEPcfbji2R47OSD0lPQ5KAtj1kn5vdtmHV+T+a/vtlVA9eE+Tp5+B I8jg== X-Gm-Message-State: AOJu0YzDxSU8tsUEN9TVVNnd1syUKpEKUoMp0stSQpxbFedAc5H3KcN2 qxDduE6gvPHSUX20c1vf4lvHeW0+GwPLdGWZ2Zj72hp8vhyNPzhOm94zwZWRXbn5E4EUCKv/Aow Y X-Received: by 2002:a17:906:4899:b0:a51:b49e:473e with SMTP id v25-20020a170906489900b00a51b49e473emr1755593ejq.19.1712740473385; Wed, 10 Apr 2024 02:14:33 -0700 (PDT) Received: from m1x-phil.lan (arl95-h02-176-184-34-173.dsl.sta.abo.bbox.fr. [176.184.34.173]) by smtp.gmail.com with ESMTPSA id jx24-20020a170907761800b00a46baba1a0asm6723080ejc.100.2024.04.10.02.14.31 (version=TLS1_3 cipher=TLS_CHACHA20_POLY1305_SHA256 bits=256/256); Wed, 10 Apr 2024 02:14:33 -0700 (PDT) From: =?utf-8?q?Philippe_Mathieu-Daud=C3=A9?= To: qemu-devel@nongnu.org Cc: =?utf-8?q?Philippe_Mathieu-Daud=C3=A9?= , Peter Maydell , Jason Wang Subject: [PULL 12/16] hw/net/lan9118: Replace magic '2048' value by MIL_TXFIFO_SIZE definition Date: Wed, 10 Apr 2024 11:13:11 +0200 Message-ID: <20240410091315.57241-13-philmd@linaro.org> X-Mailer: git-send-email 2.41.0 In-Reply-To: <20240410091315.57241-1-philmd@linaro.org> References: <20240410091315.57241-1-philmd@linaro.org> MIME-Version: 1.0 Received-SPF: pass client-ip=2a00:1450:4864:20::62f; envelope-from=philmd@linaro.org; helo=mail-ej1-x62f.google.com X-Spam_score_int: -20 X-Spam_score: -2.1 X-Spam_bar: -- X-Spam_report: (-2.1 / 5.0 requ) BAYES_00=-1.9, DKIM_SIGNED=0.1, DKIM_VALID=-0.1, DKIM_VALID_AU=-0.1, DKIM_VALID_EF=-0.1, SPF_HELO_NONE=0.001, SPF_PASS=-0.001 autolearn=ham autolearn_force=no X-Spam_action: no action X-BeenThere: qemu-devel@nongnu.org X-Mailman-Version: 2.1.29 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Errors-To: qemu-devel-bounces+patch=linaro.org@nongnu.org Sender: qemu-devel-bounces+patch=linaro.org@nongnu.org The magic 2048 is explained in the LAN9211 datasheet (DS00002414A) in chapter 1.4, "10/100 Ethernet MAC": The MAC Interface Layer (MIL), within the MAC, contains a 2K Byte transmit and a 128 Byte receive FIFO which is separate from the TX and RX FIFOs. [...] Note, the use of the constant in lan9118_receive() reveals that our implementation is using the same buffer for both tx and rx. Signed-off-by: Philippe Mathieu-Daudé Reviewed-by: Peter Maydell Message-Id: <20240409133801.23503-2-philmd@linaro.org> --- hw/net/lan9118.c | 12 +++++++++--- 1 file changed, 9 insertions(+), 3 deletions(-) diff --git a/hw/net/lan9118.c b/hw/net/lan9118.c index 47ff25b441..8214569a2c 100644 --- a/hw/net/lan9118.c +++ b/hw/net/lan9118.c @@ -150,6 +150,12 @@ do { printf("lan9118: " fmt , ## __VA_ARGS__); } while (0) #define GPT_TIMER_EN 0x20000000 +/* + * The MAC Interface Layer (MIL), within the MAC, contains a 2K Byte transmit + * and a 128 Byte receive FIFO which is separate from the TX and RX FIFOs. + */ +#define MIL_TXFIFO_SIZE 2048 + enum tx_state { TX_IDLE, TX_B, @@ -166,7 +172,7 @@ typedef struct { int32_t pad; int32_t fifo_used; int32_t len; - uint8_t data[2048]; + uint8_t data[MIL_TXFIFO_SIZE]; } LAN9118Packet; static const VMStateDescription vmstate_lan9118_packet = { @@ -182,7 +188,7 @@ static const VMStateDescription vmstate_lan9118_packet = { VMSTATE_INT32(pad, LAN9118Packet), VMSTATE_INT32(fifo_used, LAN9118Packet), VMSTATE_INT32(len, LAN9118Packet), - VMSTATE_UINT8_ARRAY(data, LAN9118Packet, 2048), + VMSTATE_UINT8_ARRAY(data, LAN9118Packet, MIL_TXFIFO_SIZE), VMSTATE_END_OF_LIST() } }; @@ -544,7 +550,7 @@ static ssize_t lan9118_receive(NetClientState *nc, const uint8_t *buf, return -1; } - if (size >= 2048 || size < 14) { + if (size >= MIL_TXFIFO_SIZE || size < 14) { return -1; }