From patchwork Fri Feb 9 17:04:55 2024 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Claudiu Beznea X-Patchwork-Id: 13551628 X-Patchwork-Delegate: geert@linux-m68k.org Received: from mail-wm1-f43.google.com (mail-wm1-f43.google.com [209.85.128.43]) (using TLSv1.2 with cipher ECDHE-RSA-AES128-GCM-SHA256 (128/128 bits)) (No client certificate requested) by smtp.subspace.kernel.org (Postfix) with ESMTPS id CDEA37BB15 for ; Fri, 9 Feb 2024 17:05:09 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=209.85.128.43 ARC-Seal: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1707498311; cv=none; b=s/MU/W6/ThWojCg7K+0WpMfbx02mTCWQm3Kog/w42b86rCnTy0jtyTAiZG1i+/5H4bYmyV9JOIEjT7EgsYs92V1dLEjsbEW5qJb/I7cGAcKNpvezZnATSenPkTlIgAcfA4yFISstBpcxN3OWN9aXhpL6lLMoJsNoOw+mkdn2ihU= ARC-Message-Signature: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1707498311; c=relaxed/simple; bh=uPRNapVGw8gXTZ9OJ20weiuo8n1QMpLfQmGGR/SfpJY=; h=From:To:Cc:Subject:Date:Message-Id:In-Reply-To:References: MIME-Version; b=WeDQzhs2vSpxaaeW19DPBG54MRqqKcHqtO4sqroHYOBCYIaq12nc9VjOJZnuxobLHJM8nh256e4+PtPjg02aOe3VqDlzlWaGAkmA8geJSL6FtxVI6rS43GSeC2pQPmTypuqHkjrb5uZ2JMhn/6GS91PcdxHYwH30dBTG0UUSaEw= ARC-Authentication-Results: i=1; smtp.subspace.kernel.org; dmarc=none (p=none dis=none) header.from=tuxon.dev; spf=pass smtp.mailfrom=tuxon.dev; dkim=pass (2048-bit key) header.d=tuxon.dev header.i=@tuxon.dev header.b=IveuWMye; arc=none smtp.client-ip=209.85.128.43 Authentication-Results: smtp.subspace.kernel.org; dmarc=none (p=none dis=none) header.from=tuxon.dev Authentication-Results: smtp.subspace.kernel.org; spf=pass smtp.mailfrom=tuxon.dev Authentication-Results: smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=tuxon.dev header.i=@tuxon.dev header.b="IveuWMye" Received: by mail-wm1-f43.google.com with SMTP id 5b1f17b1804b1-4105876a3e5so10128615e9.3 for ; Fri, 09 Feb 2024 09:05:09 -0800 (PST) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=tuxon.dev; s=google; t=1707498308; x=1708103108; darn=vger.kernel.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=bMmTy0VJjCKazgGQSctD6Q6nmkdCJjbXHjwyCoGK8ZU=; b=IveuWMye9Cd9q8ph/SP4YD04s8QI7MP+PbhGzJy7fi59ft97RWRRbZFiEfBSeYE64/ MJQe1wWn4v8rlT8UCL1F9LK6y6CTvb8F9wv4iHOSnJDLRSnwQpp+sS4+nmnV6bcUNt65 BcCmQEGzqt1hM8lTLuycP/D2rZNMPmOEN70E9SElkszcBaccv/3EFn4dXMscbtdwQz9i EUO09uczCb5HlwGlN490Z6k3Zup+fjHA1A7LfqLLCBLl/RwiJXZN6Rejz5X7RM2k/ywR Jhe+IKRXuSB2yi/8+Y2wuDOf0DwX3GNdcLcY9psTaPHVm1wtmMSafqghAiHDpm38saDe o1jQ== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20230601; t=1707498308; x=1708103108; 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=bMmTy0VJjCKazgGQSctD6Q6nmkdCJjbXHjwyCoGK8ZU=; b=fSLKAaztw9Xgrracd8yQtJH2JTKoufwrhKyS4lzwDDmPqaczjdpU4hlnUSUjHoP51o jXe96i4zUcIdoejyGGoHRZW4wlq5w48SVIr5PXDVpUsI+QZqym8vK7aUoaaNpk4sMgPR IEV5e2KQ6G3BCsE+8IEJIsRbT9uOllJxg7doHtH9uJWQNwKFfMsHcWxfP6hP4/yBEC4w sYd7fh64YR3O+nC8plNCegydxy+5tvyuA9pZccAOqLcpTZvji3FocmPaAyMc6uCXQTiC GNfjAW5KawLrOPSTFyom4Q1q+OwdZa/fa0A4qB+ybegnu6s7ntX9RX0e1LkFeoWYF8Fk 4iCw== X-Forwarded-Encrypted: i=1; AJvYcCVHdaIBK9elouWXH0qXPklrl5OtLJ+BT8ZYMPWqQwXzfqSuESzN3mew9wOaMXai3mzGlt7ysc9G2b1F41Dm/i36LR6Pn0SEVrUfXaFKH6pVqlc= X-Gm-Message-State: AOJu0YzTDlwQ2lkApF3HaiUrmG+CfYI5z6qahlJvS/XfUB0T9hcevsjo eTrkPq6x+hJA+edNSKowZSodJjLT3Hzt1RvXaLTirPsQZz567Cokp43ekC3Ub10= X-Google-Smtp-Source: AGHT+IFgtzspeBK4hEYCypshcRxjjVT3A2LpSsRXKi1lePH7r9k6/qCMkhxkT0CbxGA5+0FisbZkBQ== X-Received: by 2002:a5d:5192:0:b0:33a:fe3b:b2ae with SMTP id k18-20020a5d5192000000b0033afe3bb2aemr1626156wrv.66.1707498307928; Fri, 09 Feb 2024 09:05:07 -0800 (PST) X-Forwarded-Encrypted: i=1; AJvYcCVrLVQK/yh1IgtY5zXY/uBTVgbbVheQV+mlW1rD/wFw/A5oow2qDFCsFiFu9EZPhOIoPkmvtTQBE1s4Xl/QTeXHLFgkdfzSRe2qmagqQLxDCH9aghystw7iRORqPnmf5CXD+2qJ3uG3k1quoSjoEqjiNNqJyu53UF3nbhupyw4ayNagnLcnBKcOTE3ceKXo7U4SDWsUg4gX0bjUsQ5UKpwJHUyAh23F63h34yF4zVhSdunsd2CHThAXaaaGz8SZXrjNtYakqjl3yKa+fshWN1F5gNProC6DyS2t/HBmYyZYlfMxDpehA+wyI6658HOQjCtRQZceK+Ap00Y= Received: from claudiu-X670E-Pro-RS.. ([82.78.167.20]) by smtp.gmail.com with ESMTPSA id j18-20020a056000125200b0033afe816977sm2254998wrx.66.2024.02.09.09.05.06 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Fri, 09 Feb 2024 09:05:07 -0800 (PST) From: Claudiu X-Google-Original-From: Claudiu To: s.shtylyov@omp.ru, davem@davemloft.net, edumazet@google.com, kuba@kernel.org, pabeni@redhat.com Cc: netdev@vger.kernel.org, linux-renesas-soc@vger.kernel.org, linux-kernel@vger.kernel.org, claudiu.beznea@tuxon.dev, Claudiu Beznea Subject: [PATCH net-next v2 1/5] net: ravb: Get rid of the temporary variable irq Date: Fri, 9 Feb 2024 19:04:55 +0200 Message-Id: <20240209170459.4143861-2-claudiu.beznea.uj@bp.renesas.com> X-Mailer: git-send-email 2.39.2 In-Reply-To: <20240209170459.4143861-1-claudiu.beznea.uj@bp.renesas.com> References: <20240209170459.4143861-1-claudiu.beznea.uj@bp.renesas.com> Precedence: bulk X-Mailing-List: linux-renesas-soc@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 From: Claudiu Beznea The 4th argument of ravb_setup_irq() is used to save the IRQ number that will be further used by the driver code. Not all ravb_setup_irqs() calls need to save the IRQ number. The previous code used to pass a dummy variable as the 4th argument in case the IRQ is not needed for further usage. That is not necessary as the code from ravb_setup_irq() can detect by itself if the IRQ needs to be saved. Thus, get rid of the code that is not needed. Reported-by: Sergey Shtylyov Signed-off-by: Claudiu Beznea Reviewed-by: Sergey Shtylyov --- Changes in v2: - use a temporary variable in ravb_setup_irq() Changes since [2]: - this patch in new [2] https://lore.kernel.org/all/20240105082339.1468817-1-claudiu.beznea.uj@bp.renesas.com/ drivers/net/ethernet/renesas/ravb_main.c | 29 +++++++++++++----------- 1 file changed, 16 insertions(+), 13 deletions(-) diff --git a/drivers/net/ethernet/renesas/ravb_main.c b/drivers/net/ethernet/renesas/ravb_main.c index f9a1e9038dbf..a1bf54de0e4c 100644 --- a/drivers/net/ethernet/renesas/ravb_main.c +++ b/drivers/net/ethernet/renesas/ravb_main.c @@ -2747,24 +2747,27 @@ static int ravb_setup_irq(struct ravb_private *priv, const char *irq_name, struct device *dev = &pdev->dev; const char *dev_name; unsigned long flags; - int error; + int error, irq_num; if (irq_name) { dev_name = devm_kasprintf(dev, GFP_KERNEL, "%s:%s", ndev->name, ch); if (!dev_name) return -ENOMEM; - *irq = platform_get_irq_byname(pdev, irq_name); + irq_num = platform_get_irq_byname(pdev, irq_name); flags = 0; } else { dev_name = ndev->name; - *irq = platform_get_irq(pdev, 0); + irq_num = platform_get_irq(pdev, 0); flags = IRQF_SHARED; } - if (*irq < 0) - return *irq; + if (irq_num < 0) + return irq_num; + + if (irq) + *irq = irq_num; - error = devm_request_irq(dev, *irq, handler, flags, dev_name, ndev); + error = devm_request_irq(dev, irq_num, handler, flags, dev_name, ndev); if (error) netdev_err(ndev, "cannot request IRQ %s\n", dev_name); @@ -2776,7 +2779,7 @@ static int ravb_setup_irqs(struct ravb_private *priv) const struct ravb_hw_info *info = priv->info; struct net_device *ndev = priv->ndev; const char *irq_name, *emac_irq_name; - int error, irq; + int error; if (!info->multi_irqs) return ravb_setup_irq(priv, NULL, NULL, &ndev->irq, ravb_interrupt); @@ -2799,28 +2802,28 @@ static int ravb_setup_irqs(struct ravb_private *priv) return error; if (info->err_mgmt_irqs) { - error = ravb_setup_irq(priv, "err_a", "err_a", &irq, ravb_multi_interrupt); + error = ravb_setup_irq(priv, "err_a", "err_a", NULL, ravb_multi_interrupt); if (error) return error; - error = ravb_setup_irq(priv, "mgmt_a", "mgmt_a", &irq, ravb_multi_interrupt); + error = ravb_setup_irq(priv, "mgmt_a", "mgmt_a", NULL, ravb_multi_interrupt); if (error) return error; } - error = ravb_setup_irq(priv, "ch0", "ch0:rx_be", &irq, ravb_be_interrupt); + error = ravb_setup_irq(priv, "ch0", "ch0:rx_be", NULL, ravb_be_interrupt); if (error) return error; - error = ravb_setup_irq(priv, "ch1", "ch1:rx_nc", &irq, ravb_nc_interrupt); + error = ravb_setup_irq(priv, "ch1", "ch1:rx_nc", NULL, ravb_nc_interrupt); if (error) return error; - error = ravb_setup_irq(priv, "ch18", "ch18:tx_be", &irq, ravb_be_interrupt); + error = ravb_setup_irq(priv, "ch18", "ch18:tx_be", NULL, ravb_be_interrupt); if (error) return error; - return ravb_setup_irq(priv, "ch19", "ch19:tx_nc", &irq, ravb_nc_interrupt); + return ravb_setup_irq(priv, "ch19", "ch19:tx_nc", NULL, ravb_nc_interrupt); } static int ravb_probe(struct platform_device *pdev) From patchwork Fri Feb 9 17:04:56 2024 Content-Type: text/plain; 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([82.78.167.20]) by smtp.gmail.com with ESMTPSA id j18-20020a056000125200b0033afe816977sm2254998wrx.66.2024.02.09.09.05.08 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Fri, 09 Feb 2024 09:05:08 -0800 (PST) From: Claudiu X-Google-Original-From: Claudiu To: s.shtylyov@omp.ru, davem@davemloft.net, edumazet@google.com, kuba@kernel.org, pabeni@redhat.com Cc: netdev@vger.kernel.org, linux-renesas-soc@vger.kernel.org, linux-kernel@vger.kernel.org, claudiu.beznea@tuxon.dev, Claudiu Beznea Subject: [PATCH net-next v2 2/5] net: ravb: Keep the reverse order of operations in ravb_close() Date: Fri, 9 Feb 2024 19:04:56 +0200 Message-Id: <20240209170459.4143861-3-claudiu.beznea.uj@bp.renesas.com> X-Mailer: git-send-email 2.39.2 In-Reply-To: <20240209170459.4143861-1-claudiu.beznea.uj@bp.renesas.com> References: <20240209170459.4143861-1-claudiu.beznea.uj@bp.renesas.com> Precedence: bulk X-Mailing-List: linux-renesas-soc@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 From: Claudiu Beznea Keep the reverse order of operations in ravb_close() when compared with ravb_open(). This is the recommended configuration sequence. Signed-off-by: Claudiu Beznea Reviewed-by: Sergey Shtylyov --- Changes in v2: - none Changes since [2]: - none Changes in v3 of [2]: - fixed typos in patch description - collected tags Changes in v2 of [2]: - none; this patch is new [2] https://lore.kernel.org/all/20240105082339.1468817-1-claudiu.beznea.uj@bp.renesas.com/ drivers/net/ethernet/renesas/ravb_main.c | 16 ++++++++-------- 1 file changed, 8 insertions(+), 8 deletions(-) diff --git a/drivers/net/ethernet/renesas/ravb_main.c b/drivers/net/ethernet/renesas/ravb_main.c index a1bf54de0e4c..c81cbd81826e 100644 --- a/drivers/net/ethernet/renesas/ravb_main.c +++ b/drivers/net/ethernet/renesas/ravb_main.c @@ -2321,6 +2321,14 @@ static int ravb_close(struct net_device *ndev) ravb_write(ndev, 0, RIC2); ravb_write(ndev, 0, TIC); + /* PHY disconnect */ + if (ndev->phydev) { + phy_stop(ndev->phydev); + phy_disconnect(ndev->phydev); + if (of_phy_is_fixed_link(np)) + of_phy_deregister_fixed_link(np); + } + /* Stop PTP Clock driver */ if (info->gptp || info->ccc_gac) ravb_ptp_stop(ndev); @@ -2339,14 +2347,6 @@ static int ravb_close(struct net_device *ndev) } } - /* PHY disconnect */ - if (ndev->phydev) { - phy_stop(ndev->phydev); - phy_disconnect(ndev->phydev); - if (of_phy_is_fixed_link(np)) - of_phy_deregister_fixed_link(np); - } - cancel_work_sync(&priv->work); if (info->nc_queues) From patchwork Fri Feb 9 17:04:57 2024 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Claudiu Beznea X-Patchwork-Id: 13551630 X-Patchwork-Delegate: geert@linux-m68k.org Received: from mail-wm1-f54.google.com (mail-wm1-f54.google.com [209.85.128.54]) (using TLSv1.2 with cipher ECDHE-RSA-AES128-GCM-SHA256 (128/128 bits)) (No client certificate requested) by smtp.subspace.kernel.org (Postfix) with ESMTPS id 466CB7EEF5 for ; Fri, 9 Feb 2024 17:05:12 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=209.85.128.54 ARC-Seal: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1707498314; 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([82.78.167.20]) by smtp.gmail.com with ESMTPSA id j18-20020a056000125200b0033afe816977sm2254998wrx.66.2024.02.09.09.05.09 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Fri, 09 Feb 2024 09:05:10 -0800 (PST) From: Claudiu X-Google-Original-From: Claudiu To: s.shtylyov@omp.ru, davem@davemloft.net, edumazet@google.com, kuba@kernel.org, pabeni@redhat.com Cc: netdev@vger.kernel.org, linux-renesas-soc@vger.kernel.org, linux-kernel@vger.kernel.org, claudiu.beznea@tuxon.dev, Claudiu Beznea Subject: [PATCH net-next v2 3/5] net: ravb: Return cached statistics if the interface is down Date: Fri, 9 Feb 2024 19:04:57 +0200 Message-Id: <20240209170459.4143861-4-claudiu.beznea.uj@bp.renesas.com> X-Mailer: git-send-email 2.39.2 In-Reply-To: <20240209170459.4143861-1-claudiu.beznea.uj@bp.renesas.com> References: <20240209170459.4143861-1-claudiu.beznea.uj@bp.renesas.com> Precedence: bulk X-Mailing-List: linux-renesas-soc@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 From: Claudiu Beznea Return the cached statistics in case the interface is down. There should be no drawback to this, as cached statistics are updated in ravb_close(). In order to avoid accessing the IP registers while the IP is runtime suspended pm_runtime_active() check was introduced. The device runtime PM usage counter has been incremented to avoid disabling the device clocks while the check is in progress (if any). The commit prepares the code for the addition of runtime PM support. Suggested-by: Sergey Shtylyov Signed-off-by: Claudiu Beznea Reviewed-by: Sergey Shtylyov --- Changes in v2: - collected tag Changes since [2]: - use pm_runtime_get_noresume() and pm_runtime_active() Changes in v3 of [2]: - this was patch 18/21 in v2 - use ndev->flags & IFF_UP instead of netif_running checks Changes in v2 of [2]: - none; this patch is new [2] https://lore.kernel.org/all/20240105082339.1468817-1-claudiu.beznea.uj@bp.renesas.com/ drivers/net/ethernet/renesas/ravb_main.c | 12 ++++++++++++ 1 file changed, 12 insertions(+) diff --git a/drivers/net/ethernet/renesas/ravb_main.c b/drivers/net/ethernet/renesas/ravb_main.c index c81cbd81826e..7a7f743a1fef 100644 --- a/drivers/net/ethernet/renesas/ravb_main.c +++ b/drivers/net/ethernet/renesas/ravb_main.c @@ -2248,8 +2248,15 @@ static struct net_device_stats *ravb_get_stats(struct net_device *ndev) struct ravb_private *priv = netdev_priv(ndev); const struct ravb_hw_info *info = priv->info; struct net_device_stats *nstats, *stats0, *stats1; 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([82.78.167.20]) by smtp.gmail.com with ESMTPSA id j18-20020a056000125200b0033afe816977sm2254998wrx.66.2024.02.09.09.05.10 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Fri, 09 Feb 2024 09:05:11 -0800 (PST) From: Claudiu X-Google-Original-From: Claudiu To: s.shtylyov@omp.ru, davem@davemloft.net, edumazet@google.com, kuba@kernel.org, pabeni@redhat.com Cc: netdev@vger.kernel.org, linux-renesas-soc@vger.kernel.org, linux-kernel@vger.kernel.org, claudiu.beznea@tuxon.dev, Claudiu Beznea Subject: [PATCH net-next v2 4/5] net: ravb: Do not apply RX checksum settings to hardware if the interface is down Date: Fri, 9 Feb 2024 19:04:58 +0200 Message-Id: <20240209170459.4143861-5-claudiu.beznea.uj@bp.renesas.com> X-Mailer: git-send-email 2.39.2 In-Reply-To: <20240209170459.4143861-1-claudiu.beznea.uj@bp.renesas.com> References: <20240209170459.4143861-1-claudiu.beznea.uj@bp.renesas.com> Precedence: bulk X-Mailing-List: linux-renesas-soc@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 From: Claudiu Beznea Do not apply the RX checksum settings to hardware if the interface is down. In case runtime PM is enabled, and while the interface is down, the IP will be in reset mode (as for some platforms disabling the clocks will switch the IP to reset mode, which will lead to losing register contents) and applying settings in reset mode is not an option. Instead, cache the RX checksum settings and apply them in ravb_open() through ravb_emac_init(). This has been solved by introducing pm_runtime_active() check. The device runtime PM usage counter has been incremented to avoid disabling the device clocks while the check is in progress (if any). Commit prepares for the addition of runtime PM. Signed-off-by: Claudiu Beznea Reviewed-by: Sergey Shtylyov --- Changes in v2: - fixed typo in patch description - adjusted ravb_set_features_gbeth(); didn't collect the Sergey's Rb tag due to this Changes since [2]: - use pm_runtime_get_noresume() and pm_runtime_active() and updated the commit message to describe that - fixed typos - s/CSUM/checksum in patch title and description Changes in v3 of [2]: - this was patch 20/21 in v2 - fixed typos in patch description - removed code from ravb_open() - use ndev->flags & IFF_UP checks instead of netif_running() Changes in v2 of [2]: - none; this patch is new [2] https://lore.kernel.org/all/20240105082339.1468817-1-claudiu.beznea.uj@bp.renesas.com/ drivers/net/ethernet/renesas/ravb_main.c | 20 +++++++++++++++++++- 1 file changed, 19 insertions(+), 1 deletion(-) diff --git a/drivers/net/ethernet/renesas/ravb_main.c b/drivers/net/ethernet/renesas/ravb_main.c index 7a7f743a1fef..f4be08f0198d 100644 --- a/drivers/net/ethernet/renesas/ravb_main.c +++ b/drivers/net/ethernet/renesas/ravb_main.c @@ -2478,8 +2478,14 @@ static int ravb_change_mtu(struct net_device *ndev, int new_mtu) static void ravb_set_rx_csum(struct net_device *ndev, bool enable) { struct ravb_private *priv = netdev_priv(ndev); + struct device *dev = &priv->pdev->dev; unsigned long flags; + pm_runtime_get_noresume(dev); + + if (!pm_runtime_active(dev)) + goto out_rpm_put; + spin_lock_irqsave(&priv->lock, flags); /* Disable TX and RX */ @@ -2492,6 +2498,9 @@ static void ravb_set_rx_csum(struct net_device *ndev, bool enable) ravb_rcv_snd_enable(ndev); spin_unlock_irqrestore(&priv->lock, flags); + +out_rpm_put: + pm_runtime_put_noidle(dev); } static int ravb_endisable_csum_gbeth(struct net_device *ndev, enum ravb_reg reg, @@ -2515,10 +2524,16 @@ static int ravb_set_features_gbeth(struct net_device *ndev, { netdev_features_t changed = ndev->features ^ features; struct ravb_private *priv = netdev_priv(ndev); + struct device *dev = &priv->pdev->dev; unsigned long flags; int ret = 0; u32 val; + pm_runtime_get_noresume(dev); + + if (!pm_runtime_active(dev)) + goto out_rpm_put; + spin_lock_irqsave(&priv->lock, flags); if (changed & NETIF_F_RXCSUM) { if (features & NETIF_F_RXCSUM) @@ -2542,9 +2557,12 @@ static int ravb_set_features_gbeth(struct net_device *ndev, goto done; 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([82.78.167.20]) by smtp.gmail.com with ESMTPSA id j18-20020a056000125200b0033afe816977sm2254998wrx.66.2024.02.09.09.05.11 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Fri, 09 Feb 2024 09:05:12 -0800 (PST) From: Claudiu X-Google-Original-From: Claudiu To: s.shtylyov@omp.ru, davem@davemloft.net, edumazet@google.com, kuba@kernel.org, pabeni@redhat.com Cc: netdev@vger.kernel.org, linux-renesas-soc@vger.kernel.org, linux-kernel@vger.kernel.org, claudiu.beznea@tuxon.dev, Claudiu Beznea Subject: [PATCH net-next v2 5/5] net: ravb: Add runtime PM support Date: Fri, 9 Feb 2024 19:04:59 +0200 Message-Id: <20240209170459.4143861-6-claudiu.beznea.uj@bp.renesas.com> X-Mailer: git-send-email 2.39.2 In-Reply-To: <20240209170459.4143861-1-claudiu.beznea.uj@bp.renesas.com> References: <20240209170459.4143861-1-claudiu.beznea.uj@bp.renesas.com> Precedence: bulk X-Mailing-List: linux-renesas-soc@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 From: Claudiu Beznea Add runtime PM support for the ravb driver. As the driver is used by different IP variants, with different behaviors, to be able to have the runtime PM support available for all devices, the preparatory commits moved all the resources parsing and allocations in the driver's probe function and kept the settings for ravb_open(). This is due to the fact that on some IP variants-platforms tuples disabling/enabling the clocks will switch the IP to the reset operation mode where registers' content is lost and reconfiguration needs to be done. For this the rabv_open() function enables the clocks, switches the IP to configuration mode, applies all the registers settings and switches the IP to the operational mode. At the end of ravb_open() IP is ready to send/receive data. In ravb_close() necessary reverts are done (compared with ravb_open()), the IP is switched to reset mode and clocks are disabled. The ethtool APIs or IOCTLs that might execute while the interface is down are either cached (and applied in ravb_open()) or rejected (as at that time the IP is in reset mode). Keeping the IP in the reset mode also increases the power saved (according to the hardware manual). Signed-off-by: Claudiu Beznea Reviewed-by: Sergey Shtylyov --- Changes in v2: - none Changes since [2]: - none - didn't returned directly the ret code of pm_runtime_put_autosuspend() as, in theory, it might return 1 in case device is suspended through this calltrace: pm_runtime_put_autosuspend() -> __pm_runtime_suspend() -> rpm_suspend() -> rpm_check_suspend_allowed() Changes in v3 of [2]: - this was patch 21/21 in v2 - collected tags - fixed typos in patch description Changes in v2 of [2]: - keep RPM support for all platforms [2] https://lore.kernel.org/all/20240105082339.1468817-1-claudiu.beznea.uj@bp.renesas.com/ drivers/net/ethernet/renesas/ravb_main.c | 54 ++++++++++++++++++++++-- 1 file changed, 50 insertions(+), 4 deletions(-) diff --git a/drivers/net/ethernet/renesas/ravb_main.c b/drivers/net/ethernet/renesas/ravb_main.c index f4be08f0198d..5bbfdfeef8a9 100644 --- a/drivers/net/ethernet/renesas/ravb_main.c +++ b/drivers/net/ethernet/renesas/ravb_main.c @@ -1939,16 +1939,21 @@ static int ravb_open(struct net_device *ndev) { struct ravb_private *priv = netdev_priv(ndev); const struct ravb_hw_info *info = priv->info; + struct device *dev = &priv->pdev->dev; int error; napi_enable(&priv->napi[RAVB_BE]); if (info->nc_queues) napi_enable(&priv->napi[RAVB_NC]); + error = pm_runtime_resume_and_get(dev); + if (error < 0) + goto out_napi_off; + /* Set AVB config mode */ error = ravb_set_config_mode(ndev); if (error) - goto out_napi_off; + goto out_rpm_put; ravb_set_delay_mode(ndev); ravb_write(ndev, priv->desc_bat_dma, DBAT); @@ -1982,6 +1987,9 @@ static int ravb_open(struct net_device *ndev) ravb_stop_dma(ndev); out_set_reset: ravb_set_opmode(ndev, CCC_OPC_RESET); +out_rpm_put: + pm_runtime_mark_last_busy(dev); + pm_runtime_put_autosuspend(dev); out_napi_off: if (info->nc_queues) napi_disable(&priv->napi[RAVB_NC]); @@ -2322,6 +2330,8 @@ static int ravb_close(struct net_device *ndev) struct ravb_private *priv = netdev_priv(ndev); const struct ravb_hw_info *info = priv->info; struct ravb_tstamp_skb *ts_skb, *ts_skb2; + struct device *dev = &priv->pdev->dev; + int error; netif_tx_stop_all_queues(ndev); @@ -2371,7 +2381,14 @@ static int ravb_close(struct net_device *ndev) ravb_get_stats(ndev); /* Set reset mode. */ - return ravb_set_opmode(ndev, CCC_OPC_RESET); + error = ravb_set_opmode(ndev, CCC_OPC_RESET); + if (error) + return error; + + pm_runtime_mark_last_busy(dev); + pm_runtime_put_autosuspend(dev); + + return 0; } static int ravb_hwtstamp_get(struct net_device *ndev, struct ifreq *req) @@ -2931,6 +2948,8 @@ static int ravb_probe(struct platform_device *pdev) clk_prepare(priv->refclk); platform_set_drvdata(pdev, ndev); + pm_runtime_set_autosuspend_delay(&pdev->dev, 100); + pm_runtime_use_autosuspend(&pdev->dev); pm_runtime_enable(&pdev->dev); error = pm_runtime_resume_and_get(&pdev->dev); if (error < 0) @@ -3036,6 +3055,9 @@ static int ravb_probe(struct platform_device *pdev) netdev_info(ndev, "Base address at %#x, %pM, IRQ %d.\n", (u32)ndev->base_addr, ndev->dev_addr, ndev->irq); + pm_runtime_mark_last_busy(&pdev->dev); + pm_runtime_put_autosuspend(&pdev->dev); + return 0; out_napi_del: @@ -3053,6 +3075,7 @@ static int ravb_probe(struct platform_device *pdev) pm_runtime_put(&pdev->dev); out_rpm_disable: pm_runtime_disable(&pdev->dev); + pm_runtime_dont_use_autosuspend(&pdev->dev); clk_unprepare(priv->refclk); out_reset_assert: reset_control_assert(rstc); @@ -3066,6 +3089,12 @@ static void ravb_remove(struct platform_device *pdev) struct net_device *ndev = platform_get_drvdata(pdev); struct ravb_private *priv = netdev_priv(ndev); const struct ravb_hw_info *info = priv->info; + struct device *dev = &priv->pdev->dev; + int error; + + error = pm_runtime_resume_and_get(dev); + if (error < 0) + return; unregister_netdev(ndev); if (info->nc_queues) @@ -3077,8 +3106,9 @@ static void ravb_remove(struct platform_device *pdev) dma_free_coherent(ndev->dev.parent, priv->desc_bat_size, priv->desc_bat, priv->desc_bat_dma); - pm_runtime_put_sync(&pdev->dev); + pm_runtime_put_sync_suspend(&pdev->dev); pm_runtime_disable(&pdev->dev); + pm_runtime_dont_use_autosuspend(dev); clk_unprepare(priv->refclk); reset_control_assert(priv->rstc); free_netdev(ndev); @@ -3160,6 +3190,10 @@ static int ravb_suspend(struct device *dev) if (ret) return ret; + ret = pm_runtime_force_suspend(&priv->pdev->dev); + if (ret) + return ret; + reset_assert: return reset_control_assert(priv->rstc); } @@ -3182,16 +3216,28 @@ static int ravb_resume(struct device *dev) ret = ravb_wol_restore(ndev); if (ret) return ret; + } else { + ret = pm_runtime_force_resume(dev); + if (ret) + return ret; } /* Reopening the interface will restore the device to the working state. */ ret = ravb_open(ndev); if (ret < 0) - return ret; + goto out_rpm_put; ravb_set_rx_mode(ndev); netif_device_attach(ndev); + return 0; + +out_rpm_put: + if (!priv->wol_enabled) { + pm_runtime_mark_last_busy(dev); + pm_runtime_put_autosuspend(dev); + } + return ret; }