From patchwork Thu May 23 20:03:57 2019 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Heiner Kallweit X-Patchwork-Id: 1104396 X-Patchwork-Delegate: bhelgaas@google.com Return-Path: X-Original-To: incoming@patchwork.ozlabs.org Delivered-To: patchwork-incoming@bilbo.ozlabs.org Authentication-Results: ozlabs.org; spf=none (mailfrom) smtp.mailfrom=vger.kernel.org (client-ip=209.132.180.67; helo=vger.kernel.org; envelope-from=linux-pci-owner@vger.kernel.org; receiver=) Authentication-Results: ozlabs.org; dmarc=pass (p=none dis=none) header.from=gmail.com Authentication-Results: ozlabs.org; dkim=pass (2048-bit key; unprotected) header.d=gmail.com header.i=@gmail.com header.b="RCdh0RYq"; dkim-atps=neutral Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by ozlabs.org (Postfix) with ESMTP id 4590qf3BJVz9s00 for ; Fri, 24 May 2019 06:05:50 +1000 (AEST) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S2387497AbfEWUFt (ORCPT ); Thu, 23 May 2019 16:05:49 -0400 Received: from mail-wr1-f65.google.com ([209.85.221.65]:43731 "EHLO mail-wr1-f65.google.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S2387455AbfEWUFt (ORCPT ); Thu, 23 May 2019 16:05:49 -0400 Received: by mail-wr1-f65.google.com with SMTP id t7so7289355wrr.10 for ; Thu, 23 May 2019 13:05:48 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=gmail.com; s=20161025; h=subject:from:to:cc:references:message-id:date:user-agent :mime-version:in-reply-to:content-language:content-transfer-encoding; bh=Kzu+IErrOKTjkX/at7kkRf5eNsPGEAisB7hOvORvAyU=; b=RCdh0RYqWGQrJZJD11U9Nh8vZBbPCgulFCh7jH5dTQgMOO9taP3l6GrXpbJye2nMHr m3ybaKaBSSC7tIJehcnpCTR3IExfO2pTOosYPmnCu/RruluAKQmCheHtyqkZwhWy0MuC 5O3QIddRXmS1ssOfaSNWmpPIKQPr2092cBN2o1LyBKtjiYnn87POvWnaHh8SUpPB1Azy Yy/ji4Hlf2P2zvTcpknp3wiV96Fv4IJzWuwEFNqoEIxebHJ4zQ5eTHf7ac3sfg8HTRay WWjlgaHtPNBJ6Pzfjs3jH5roGWTjrfM9MWu4UtN9Q1iDE0PaAJGcNU3gTJcujS9UOEjM fdZQ== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20161025; h=x-gm-message-state:subject:from:to:cc:references:message-id:date :user-agent:mime-version:in-reply-to:content-language :content-transfer-encoding; bh=Kzu+IErrOKTjkX/at7kkRf5eNsPGEAisB7hOvORvAyU=; b=DGJEfSZMt8F/nJDg4LU3ZJ3Jfd5LoMAxk2D0viZijRCBxvtjK6NiJ1Y2Voo0hQ7W8g 0ecm2zTCyPIPx1RpgcCOGP7Ly3khJgjUO9CnqHYFlBJBJq+Wei3vyr4qxOAg2wlEdx7O HfvhLuAnw186mvtWwZvsVjlaAaZ/XeBDGUgnceIgWn8NiKrRMcG/wMFQWO50vvQDK4SJ yIZZx4nxO4GHJRY9DPPM7SnQvX3UuxY6s6FWWMxgLPcqCIiOju32GcfLabrkzP/gM7/E l/n3QPmhKI/d0Ro+FMO98lwgfSuER4CJFx0A/JCFvK5zxOo2mbMOglL9fbBIWkAo27ap ONLQ== X-Gm-Message-State: APjAAAUWXCIOjaspKR/4S/nSymrv/jEtNTwcTN+pZ0TUpDXCPRRpgleq Go6AcpLv8lOtSssuaRYZSbeO2L6P X-Google-Smtp-Source: APXvYqxUzbW/XlK7vVoAUgPNbwBILV0YjHUwPUrEACS+5QfMLFVjsej8W+lME//BTW7XND1lLgkoig== X-Received: by 2002:adf:edce:: with SMTP id v14mr55926977wro.94.1558641947165; Thu, 23 May 2019 13:05:47 -0700 (PDT) Received: from ?IPv6:2003:ea:8be9:7a00:3cd1:e8fe:d810:b3f0? (p200300EA8BE97A003CD1E8FED810B3F0.dip0.t-ipconnect.de. [2003:ea:8be9:7a00:3cd1:e8fe:d810:b3f0]) by smtp.googlemail.com with ESMTPSA id f24sm276599wmb.16.2019.05.23.13.05.46 (version=TLS1_2 cipher=ECDHE-RSA-AES128-GCM-SHA256 bits=128/128); Thu, 23 May 2019 13:05:46 -0700 (PDT) Subject: [PATCH 1/3] PCI/ASPM: add L1 sub-state support to pci_disable_link_state From: Heiner Kallweit To: Frederick Lawler , Bjorn Helgaas Cc: "linux-pci@vger.kernel.org" References: <7a6d2f14-f2a6-99ad-3a93-fdaa0726ce86@gmail.com> Message-ID: <6b01bb7d-8ed7-89f0-46e1-5f8a34d68f79@gmail.com> Date: Thu, 23 May 2019 22:03:57 +0200 User-Agent: Mozilla/5.0 (Windows NT 10.0; WOW64; rv:60.0) Gecko/20100101 Thunderbird/60.6.1 MIME-Version: 1.0 In-Reply-To: <7a6d2f14-f2a6-99ad-3a93-fdaa0726ce86@gmail.com> Content-Language: en-US Sender: linux-pci-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-pci@vger.kernel.org Add support for disabling states L1.1 and L1.2 to pci_disable_link_state. Signed-off-by: Heiner Kallweit --- drivers/pci/pcie/aspm.c | 13 ++++++++++--- include/linux/pci-aspm.h | 8 +++++--- 2 files changed, 15 insertions(+), 6 deletions(-) diff --git a/drivers/pci/pcie/aspm.c b/drivers/pci/pcie/aspm.c index fd4cb7508..511f3e018 100644 --- a/drivers/pci/pcie/aspm.c +++ b/drivers/pci/pcie/aspm.c @@ -35,9 +35,9 @@ #define ASPM_STATE_L1_1_PCIPM (0x20) /* PCI PM L1.1 state */ #define ASPM_STATE_L1_2_PCIPM (0x40) /* PCI PM L1.2 state */ #define ASPM_STATE_L1_SS_PCIPM (ASPM_STATE_L1_1_PCIPM | ASPM_STATE_L1_2_PCIPM) +#define ASPM_STATE_L1_1_MASK (ASPM_STATE_L1_1 | ASPM_STATE_L1_1_PCIPM) #define ASPM_STATE_L1_2_MASK (ASPM_STATE_L1_2 | ASPM_STATE_L1_2_PCIPM) -#define ASPM_STATE_L1SS (ASPM_STATE_L1_1 | ASPM_STATE_L1_1_PCIPM |\ - ASPM_STATE_L1_2_MASK) +#define ASPM_STATE_L1SS (ASPM_STATE_L1_1_MASK | ASPM_STATE_L1_2_MASK) #define ASPM_STATE_L0S (ASPM_STATE_L0S_UP | ASPM_STATE_L0S_DW) #define ASPM_STATE_ALL (ASPM_STATE_L0S | ASPM_STATE_L1 | \ ASPM_STATE_L1SS) @@ -1094,8 +1094,15 @@ static void __pci_disable_link_state(struct pci_dev *pdev, int state, bool sem) link = parent->link_state; if (state & PCIE_LINK_STATE_L0S) link->aspm_disable |= ASPM_STATE_L0S; - if (state & PCIE_LINK_STATE_L1) + if (state & PCIE_LINK_STATE_L1) { link->aspm_disable |= ASPM_STATE_L1; + /* sub-states require L1 */ + link->aspm_disable |= ASPM_STATE_L1SS; + } + if (state & PCIE_LINK_STATE_L1_1) + link->aspm_disable |= ASPM_STATE_L1_1_MASK; + if (state & PCIE_LINK_STATE_L1_2) + link->aspm_disable |= ASPM_STATE_L1_2_MASK; pcie_config_aspm_link(link, policy_to_aspm_state(link)); if (state & PCIE_LINK_STATE_CLKPM) { diff --git a/include/linux/pci-aspm.h b/include/linux/pci-aspm.h index df28af5ce..e66c3e3d8 100644 --- a/include/linux/pci-aspm.h +++ b/include/linux/pci-aspm.h @@ -19,9 +19,11 @@ #include -#define PCIE_LINK_STATE_L0S 1 -#define PCIE_LINK_STATE_L1 2 -#define PCIE_LINK_STATE_CLKPM 4 +#define PCIE_LINK_STATE_L0S BIT(0) +#define PCIE_LINK_STATE_L1 BIT(1) +#define PCIE_LINK_STATE_CLKPM BIT(2) +#define PCIE_LINK_STATE_L1_1 BIT(3) +#define PCIE_LINK_STATE_L1_2 BIT(4) #ifdef CONFIG_PCIEASPM void pci_disable_link_state(struct pci_dev *pdev, int state);