From patchwork Sat Oct 16 07:54:38 2021 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Kai-Heng Feng X-Patchwork-Id: 12563299 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 mail.kernel.org (mail.kernel.org [198.145.29.99]) by smtp.lore.kernel.org (Postfix) with ESMTP id 6A2B1C433F5 for ; Sat, 16 Oct 2021 07:54:56 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id 3E8BC611C1 for ; Sat, 16 Oct 2021 07:54:56 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S243827AbhJPH5C (ORCPT ); Sat, 16 Oct 2021 03:57:02 -0400 Received: from smtp-relay-canonical-1.canonical.com ([185.125.188.121]:59570 "EHLO smtp-relay-canonical-1.canonical.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S239780AbhJPH5C (ORCPT ); Sat, 16 Oct 2021 03:57:02 -0400 Received: from HP-EliteBook-840-G7.. (36-229-230-94.dynamic-ip.hinet.net [36.229.230.94]) (using TLSv1.3 with cipher TLS_AES_256_GCM_SHA384 (256/256 bits) key-exchange X25519 server-signature RSA-PSS (2048 bits) server-digest SHA256) (No client certificate requested) by smtp-relay-canonical-1.canonical.com (Postfix) with ESMTPSA id 4245440006; Sat, 16 Oct 2021 07:54:50 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=canonical.com; s=20210705; t=1634370893; bh=dmMqH189MgMERJiF32ZGqhoe38YQLnpFNd8vh1JzIdw=; h=From:To:Cc:Subject:Date:Message-Id:MIME-Version; b=lBFyLyAYgyhpAC51eRIk+yhL5Y1H1nZ1L5j7lphkKn9NfVsMg4fOk0TJbn+OIEqdC Kg4c69Nzy+q8RyTMjE0BFLZfwpskU1RGiSFibVLW9O3FB/08GiorEf2UlbOOh97ARF lgNgHovsVyOcDYWjZG/qLn00Tzm8Ct/5FOluOU2Cjiqms9GxUANKt7aAhURfl9iHmI qPzHdEBnRG4o4NrtlAkUrNu8FmUCiZDgJh0wgFbBd+3HbxFC00kKyQP2GJg5gGQNJS Einw4X8uqoMm3wBbKKR5UOey3OKOlqi240ee5Ntp72We+N+MwEDmcQaCV6VxNZVQBU o5LVCSJub0ScQ== From: Kai-Heng Feng To: hkallweit1@gmail.com, nic_swsd@realtek.com, bhelgaas@google.com Cc: davem@davemloft.net, kuba@kernel.org, anthony.wong@canonical.com, netdev@vger.kernel.org, linux-pci@vger.kernel.org, linux-kernel@vger.kernel.org, Kai-Heng Feng Subject: [RFC] [PATCH net-next v7 0/4] r8169: Implement dynamic ASPM mechanism for recent 1.0/2.5Gbps Realtek NICs Date: Sat, 16 Oct 2021 15:54:38 +0800 Message-Id: <20211016075442.650311-1-kai.heng.feng@canonical.com> X-Mailer: git-send-email 2.32.0 MIME-Version: 1.0 Precedence: bulk List-ID: X-Mailing-List: linux-pci@vger.kernel.org The purpose of the series is to get comments and reviews so we can merge and test the series in downstream kernel. The latest Realtek vendor driver and its Windows driver implements a feature called "dynamic ASPM" which can improve performance on it's ethernet NICs. Heiner Kallweit pointed out the potential root cause can be that the buffer is to small for its ASPM exit latency. So bring the dynamic ASPM to r8169 so we can have both nice performance and powersaving at the same time. For the slow/fast alternating traffic pattern, we'll need some real world test to know if we need to lower the dynamic ASPM interval. v6: https://lore.kernel.org/netdev/20211007161552.272771-1-kai.heng.feng@canonical.com/ v5: https://lore.kernel.org/netdev/20210916154417.664323-1-kai.heng.feng@canonical.com/ v4: https://lore.kernel.org/netdev/20210827171452.217123-1-kai.heng.feng@canonical.com/ v3: https://lore.kernel.org/netdev/20210819054542.608745-1-kai.heng.feng@canonical.com/ v2: https://lore.kernel.org/netdev/20210812155341.817031-1-kai.heng.feng@canonical.com/ v1: https://lore.kernel.org/netdev/20210803152823.515849-1-kai.heng.feng@canonical.com/ Kai-Heng Feng (4): PCI/ASPM: Add pcie_aspm_capable() r8169: Enable chip-specific ASPM regardless of PCIe ASPM status r8169: Use mutex to guard config register locking r8169: Implement dynamic ASPM mechanism drivers/net/ethernet/realtek/r8169_main.c | 70 ++++++++++++++++++++--- drivers/pci/pcie/aspm.c | 11 ++++ include/linux/pci.h | 2 + 3 files changed, 74 insertions(+), 9 deletions(-)