From patchwork Wed Nov 23 12:48:35 2022 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Roger Quadros X-Patchwork-Id: 628767 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 208ECC4167D for ; Wed, 23 Nov 2022 13:05:28 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S238143AbiKWNF0 (ORCPT ); Wed, 23 Nov 2022 08:05:26 -0500 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:42938 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S238577AbiKWNFB (ORCPT ); Wed, 23 Nov 2022 08:05:01 -0500 Received: from dfw.source.kernel.org (dfw.source.kernel.org [139.178.84.217]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id 5D636CEBB5; Wed, 23 Nov 2022 04:49:14 -0800 (PST) Received: from smtp.kernel.org (relay.kernel.org [52.25.139.140]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by dfw.source.kernel.org (Postfix) with ESMTPS id A451B61C61; Wed, 23 Nov 2022 12:48:59 +0000 (UTC) Received: by smtp.kernel.org (Postfix) with ESMTPSA id A5559C43144; Wed, 23 Nov 2022 12:48:56 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=k20201202; t=1669207739; bh=o3Io+SK7lX1cC2f73bZPoDGBckcr/KVKDkRqhBF9SK4=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=j/bcDk7krj5VnAJm2QAY4P6ukQmr50nr9VztKrPLZPPaAHHARlB6jDeG3CJe7ygK9 ajzzdKjAc2QfpF2CE4IYwJ3JEUOC+BJ/c0v6+WZaPjIOVTPdc5ZdnxRSTDpyHYlFxZ YH2We6ZPxg2x9fSSn8yDKw1rYBeFFJhm/n1CSHt8ilolU4AMupj5uTXVou9+f30F6j VZ7ruHQjgtlhEPGMXxc9H4QuOMQftV/WiJtoJ0yCDe3/rqaSPF+fwu2iu2FmOozO6k ZotEDFxugoZRZXAlfCmiy8buyVdCayVEkeBUKn4/WggsU+nvHnYZE3FyTD2j0MuDfM KqB9UuK0uof5g== From: Roger Quadros To: davem@davemloft.net, maciej.fijalkowski@intel.com, kuba@kernel.org Cc: edumazet@google.com, pabeni@redhat.com, vigneshr@ti.com, linux-omap@vger.kernel.org, netdev@vger.kernel.org, linux-kernel@vger.kernel.org, Roger Quadros Subject: [PATCH v3 net-next 6/6] net: ethernet: ti: am65-cpsw: Fix hardware switch mode on suspend/resume Date: Wed, 23 Nov 2022 14:48:35 +0200 Message-Id: <20221123124835.18937-7-rogerq@kernel.org> X-Mailer: git-send-email 2.17.1 In-Reply-To: <20221123124835.18937-1-rogerq@kernel.org> References: <20221123124835.18937-1-rogerq@kernel.org> Precedence: bulk List-ID: X-Mailing-List: linux-omap@vger.kernel.org On low power during system suspend the ALE table context is lost. Save the ALE context before suspend and restore it after resume. Signed-off-by: Roger Quadros Signed-off-by: David S. Miller --- drivers/net/ethernet/ti/am65-cpsw-nuss.c | 7 +++++++ drivers/net/ethernet/ti/am65-cpsw-nuss.h | 2 ++ 2 files changed, 9 insertions(+) diff --git a/drivers/net/ethernet/ti/am65-cpsw-nuss.c b/drivers/net/ethernet/ti/am65-cpsw-nuss.c index f5357afde527..72e4ee71f106 100644 --- a/drivers/net/ethernet/ti/am65-cpsw-nuss.c +++ b/drivers/net/ethernet/ti/am65-cpsw-nuss.c @@ -2712,6 +2712,7 @@ static int am65_cpsw_nuss_probe(struct platform_device *pdev) struct clk *clk; u64 id_temp; int ret, i; + int ale_entries; common = devm_kzalloc(dev, sizeof(struct am65_cpsw_common), GFP_KERNEL); if (!common) @@ -2807,6 +2808,10 @@ static int am65_cpsw_nuss_probe(struct platform_device *pdev) goto err_of_clear; } + ale_entries = common->ale->params.ale_entries; + common->ale_context = devm_kzalloc(dev, + ale_entries * ALE_ENTRY_WORDS * sizeof(u32), + GFP_KERNEL); ret = am65_cpsw_init_cpts(common); if (ret) goto err_of_clear; @@ -2877,6 +2882,7 @@ static int am65_cpsw_nuss_suspend(struct device *dev) int i, ret; struct am65_cpsw_host *host_p = am65_common_get_host(common); + cpsw_ale_dump(common->ale, common->ale_context); host_p->vid_context = readl(host_p->port_base + AM65_CPSW_PORT_VLAN_REG_OFFSET); for (i = 0; i < common->port_num; i++) { port = &common->ports[i]; @@ -2949,6 +2955,7 @@ static int am65_cpsw_nuss_resume(struct device *dev) } writel(host_p->vid_context, host_p->port_base + AM65_CPSW_PORT_VLAN_REG_OFFSET); + cpsw_ale_restore(common->ale, common->ale_context); return 0; } diff --git a/drivers/net/ethernet/ti/am65-cpsw-nuss.h b/drivers/net/ethernet/ti/am65-cpsw-nuss.h index e95cc37a7286..4b75620f8d28 100644 --- a/drivers/net/ethernet/ti/am65-cpsw-nuss.h +++ b/drivers/net/ethernet/ti/am65-cpsw-nuss.h @@ -149,6 +149,8 @@ struct am65_cpsw_common { struct net_device *hw_bridge_dev; struct notifier_block am65_cpsw_netdevice_nb; unsigned char switch_id[MAX_PHYS_ITEM_ID_LEN]; + /* only for suspend/resume context restore */ + u32 *ale_context; }; struct am65_cpsw_ndev_stats {