From patchwork Fri Feb 9 17:04:59 2024 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: claudiu beznea X-Patchwork-Id: 13551647 X-Patchwork-Delegate: kuba@kernel.org Received: from mail-wr1-f50.google.com (mail-wr1-f50.google.com [209.85.221.50]) (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 AC58C8286E for ; Fri, 9 Feb 2024 17:05:14 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=209.85.221.50 ARC-Seal: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1707498317; cv=none; b=YvM17yT5EPY6iRIc5JfPzjdpeCOYNp4+nZxfhYTIJV7NeW9QRKGdGh5ibCB7JKvdKE8gjNHy52XlUHvjXEG2CDdejh2O66jCzGedK4+9gfIod44bXlu4xEuUHTVdlDOHpUEWk/TOeXNL1OCy0f4p4Tia1dglZnr3g0Dst7AYnPM= ARC-Message-Signature: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1707498317; c=relaxed/simple; bh=aJyW6klkiCEWCaN1kbMLvNn/LlK4LBkX7wlr068Ea4o=; h=From:To:Cc:Subject:Date:Message-Id:In-Reply-To:References: MIME-Version; b=coq9G5KziCKrE+VSeUYSRhMxD8lNJPca2N8kpoDqMqzu4yRuWWL9c28eMTLa8+pE+H9d9Aij1Oz96H4tlGjNX2/rTBfoDufQsoyIHMvfYhKpMoUIBixq6Yyu/8pWBkvBuNMD2r9ApAPPo5u8tLiR0cnWsv1E25nddgoDbt+FTZE= 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=RGEh8TJ9; arc=none smtp.client-ip=209.85.221.50 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="RGEh8TJ9" Received: by mail-wr1-f50.google.com with SMTP id ffacd0b85a97d-33b0e5d1e89so727264f8f.0 for ; Fri, 09 Feb 2024 09:05:14 -0800 (PST) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=tuxon.dev; s=google; t=1707498313; x=1708103113; 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=MqzOcrxXkmN2Q8OVFhHyTRPrKazqUHrRQjUC+mJFZvQ=; b=RGEh8TJ9P41fDWbgg8mMzyM48VALVnzIwSvQ9jE3B+JHDfNuC8RMn4HoL1x4Xk/Vxz UK13PS0Cnet/r3bs+KaZIC4g+Cw9vJPkZ5ot3DjosbkbbEyYzSq76xdnUhQ4l4PooM7/ rWTbcCloSS33zP4teeEu2l5me+gJPVXFKDIqFAcNGh7BMvB87fT5Xe45hXU3DCf7Rwfy Pqrxs+oZZ7pluO33yyKJR/yHVmp+YsRvUBxSXla1xwFu6Lb1DZjijNmVa14sKGA9T0do PPeKiGb03Q3hlKYf7zjL4aCCqwwe939sEV75PSDnBGLf7Yv5m6p1yh6texPSTYJmPQXC GvRg== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20230601; t=1707498313; x=1708103113; 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=MqzOcrxXkmN2Q8OVFhHyTRPrKazqUHrRQjUC+mJFZvQ=; b=CnGXUKRdEo5mZCnNcwIdNuIwI3P3Bh23U0S1tBrK1R4E9NK9kN0oG3cq3Id+Hmwz5K 83k7UuOjt2plahs2yWJsf2oTEh24IRlURAxi7IY2Mp9/JTQP7aT36on7kXSwjZu5Pn1R 8pnwp/yuXRJkhnHIo2UkfASN4E3MltqSTbbry0DDsqF3TFyAghRR9M+RXwlat4prVoy4 wN0DxGp5Diu4F8fK+lqI2pfNAXd6gJAZjJKthQF0YIiHoIXZ8e7BRiW3FTgJKJQjgG2X ++HEjEweNVIz8rIMyBM1YK9PtjlYrS71ovnP1IS5e7iqWlB2c3tu1aduL0FV6c8/L5v/ +wqw== X-Gm-Message-State: AOJu0Yxw5EdfMYDwXxZh0s71SSw3JGpUDiv5hGm+lyoLwht1vc49lSlS y8L0id0F+e7ynbJFRaTVWL/6oYBGivDEEYpP3i9oKobvhS+iPHiA9xDIdmf/c8g= X-Google-Smtp-Source: AGHT+IFxLo+CiICYpnYHw6k+gNZW5Zk0PUqPuUfJPLlH2Wr89LM0zZi9p0YCjDX9UvUIpD6pI6Nl8g== X-Received: by 2002:adf:b192:0:b0:33b:4f08:ac9c with SMTP id q18-20020adfb192000000b0033b4f08ac9cmr1629190wra.33.1707498313034; Fri, 09 Feb 2024 09:05:13 -0800 (PST) X-Forwarded-Encrypted: i=1; AJvYcCU8Rwost7tjJg6H1HzwrY78TwXxkunRNolTYR9oJ4fG7D3nXXseL7stbAf9T6SFH0QGRTfODwm+agRk/BYFce57fErHFoVBgoPkQ0jj0q6Kadw4aCCyu09k1CzpvrcZXo4AC9UldBwunIc6SrriDUoBeD5Zqf/q2LgKlmNczgl3bp0oirUtBRkOnat2ztVWG7deSi0mfMtqmthieTmNRCMoXGVnX2Ua5X889aRGMlf1mg9Vug7O46MJUiIrEtdckFytwSstSCPlZKUypyIcI24qU8364+pVtm5jgTbxJkCw/5RC0K5cn0+fI9s7wLG2Oiu9WNWJNVLWXq8= Received: from claudiu-X670E-Pro-RS.. ([82.78.167.20]) by smtp.gmail.com with ESMTPSA id j18-20020a056000125200b0033afe816977sm2254998wrx.66.2024.02.09.09.05.11 (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: netdev@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 X-Patchwork-Delegate: kuba@kernel.org 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; }