From patchwork Mon Sep 18 13:11:02 2023 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 8bit X-Patchwork-Submitter: =?utf-8?q?Ilpo_J=C3=A4rvinen?= X-Patchwork-Id: 13390005 Received: from lindbergh.monkeyblade.net (lindbergh.monkeyblade.net [23.128.96.19]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by smtp.subspace.kernel.org (Postfix) with ESMTPS id 0D64422F1F for ; Mon, 18 Sep 2023 16:17:45 +0000 (UTC) Received: from mgamail.intel.com (mgamail.intel.com [134.134.136.100]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id D674A1FC9; Mon, 18 Sep 2023 09:17:37 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=intel.com; i=@intel.com; q=dns/txt; s=Intel; t=1695053858; x=1726589858; h=from:to:cc:subject:date:message-id:in-reply-to: references:mime-version:content-transfer-encoding; bh=kDT+yWJAUHrBQ8ex5Uxk7tCrxharMirq80UQzoJeAvk=; b=JubL0SGD129feTlxJbpEtLUy5fAs6Exf+tYTFgooSXcczDpaAndTVc2O IF0Rux7dygTVLWBcC4nqidMxiFnC9c9tQTT7d/0L8LA6pH6wjY6QBCPt4 vfW9hx7c70IMqrxn6dvsW/jMsIbI77mMPrXEqzimjXBMRAH0wccmmY+b0 ljVmKf0zfF+ds94dkq8IEqhKersOT5Ic7MaP8L3ZF99+f5xWE8YLVQRQ2 mtUxcJiutcmG+YrkgBBt6b4bqxU2qPf0VtrarGrLJcyHzlajnCYICAAmf 4sOY5Oy5Ju7Rf1jzssP6IFHfna1L8EbF8G0neV4V4BgBdMppJOvGGBUfk A==; X-IronPort-AV: E=McAfee;i="6600,9927,10837"; a="446113624" X-IronPort-AV: E=Sophos;i="6.02,156,1688454000"; d="scan'208";a="446113624" Received: from fmsmga008.fm.intel.com ([10.253.24.58]) by orsmga105.jf.intel.com with ESMTP/TLS/ECDHE-RSA-AES256-GCM-SHA384; 18 Sep 2023 06:13:53 -0700 X-ExtLoop1: 1 X-IronPort-AV: E=McAfee;i="6600,9927,10837"; a="811343130" X-IronPort-AV: E=Sophos;i="6.02,156,1688454000"; d="scan'208";a="811343130" Received: from nprotaso-mobl1.ccr.corp.intel.com (HELO ijarvine-mobl2.ger.corp.intel.com) ([10.252.49.156]) by fmsmga008-auth.fm.intel.com with ESMTP/TLS/ECDHE-RSA-AES256-GCM-SHA384; 18 Sep 2023 06:13:47 -0700 From: =?utf-8?q?Ilpo_J=C3=A4rvinen?= To: linux-pci@vger.kernel.org, Bjorn Helgaas , Lorenzo Pieralisi , Rob Herring , =?utf-8?q?Krzysztof_Wilczy=C5=84ski?= , Lukas Wunner , "Rafael J . Wysocki" , Heiner Kallweit , Emmanuel Grumbach , linux-kernel@vger.kernel.org, Dennis Dalessandro , Jason Gunthorpe , Leon Romanovsky , linux-rdma@vger.kernel.org Cc: ath10k@lists.infradead.org, ath11k@lists.infradead.org, ath12k@lists.infradead.org, intel-wired-lan@lists.osuosl.org, linux-arm-kernel@lists.infradead.org, linux-bluetooth@vger.kernel.org, linux-mediatek@lists.infradead.org, linux-wireless@vger.kernel.org, netdev@vger.kernel.org, =?utf-8?q?Ilpo_J=C3=A4rvinen?= , Dean Luick Subject: [PATCH v2 12/13] RDMA/hfi1: Use pci_disable/enable_link_state() Date: Mon, 18 Sep 2023 16:11:02 +0300 Message-Id: <20230918131103.24119-13-ilpo.jarvinen@linux.intel.com> X-Mailer: git-send-email 2.30.2 In-Reply-To: <20230918131103.24119-1-ilpo.jarvinen@linux.intel.com> References: <20230918131103.24119-1-ilpo.jarvinen@linux.intel.com> Precedence: bulk X-Mailing-List: netdev@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 X-Spam-Status: No, score=-2.0 required=5.0 tests=BAYES_00,DKIMWL_WL_HIGH, DKIM_SIGNED,DKIM_VALID,DKIM_VALID_EF,RCVD_IN_DNSWL_BLOCKED, SPF_HELO_NONE,SPF_NONE autolearn=ham autolearn_force=no version=3.4.6 X-Spam-Checker-Version: SpamAssassin 3.4.6 (2021-04-09) on lindbergh.monkeyblade.net IB/hfi1 driver adjusts ASPM state itself which leaves ASPM service driver in PCI core unaware of the link state changes the driver implemented. Call pci_disable_link_state() and pci_enable_link_state() instead of adjusting ASPMC field in LNKCTL directly in the driver and let PCI core handle the ASPM state management. Remove the functions that handled the ASPM changes that are now unnecessary. Signed-off-by: Ilpo Järvinen Reviewed-by: Dean Luick --- drivers/infiniband/hw/hfi1/aspm.c | 38 +++---------------------------- drivers/infiniband/hw/hfi1/pcie.c | 2 +- 2 files changed, 4 insertions(+), 36 deletions(-) diff --git a/drivers/infiniband/hw/hfi1/aspm.c b/drivers/infiniband/hw/hfi1/aspm.c index a3c53be4072c..8e3fc1d4c9c6 100644 --- a/drivers/infiniband/hw/hfi1/aspm.c +++ b/drivers/infiniband/hw/hfi1/aspm.c @@ -54,45 +54,13 @@ static void aspm_hw_set_l1_ent_latency(struct hfi1_devdata *dd) pci_write_config_dword(dd->pcidev, PCIE_CFG_REG_PL3, reg32); } -static void aspm_hw_enable_l1(struct hfi1_devdata *dd) -{ - struct pci_dev *parent = dd->pcidev->bus->self; - - /* - * If the driver does not have access to the upstream component, - * it cannot support ASPM L1 at all. - */ - if (!parent) - return; - - /* Enable ASPM L1 first in upstream component and then downstream */ - pcie_capability_clear_and_set_word(parent, PCI_EXP_LNKCTL, - PCI_EXP_LNKCTL_ASPMC, - PCI_EXP_LNKCTL_ASPM_L1); - pcie_capability_clear_and_set_word(dd->pcidev, PCI_EXP_LNKCTL, - PCI_EXP_LNKCTL_ASPMC, - PCI_EXP_LNKCTL_ASPM_L1); -} - -void aspm_hw_disable_l1(struct hfi1_devdata *dd) -{ - struct pci_dev *parent = dd->pcidev->bus->self; - - /* Disable ASPM L1 first in downstream component and then upstream */ - pcie_capability_clear_and_set_word(dd->pcidev, PCI_EXP_LNKCTL, - PCI_EXP_LNKCTL_ASPMC, 0x0); - if (parent) - pcie_capability_clear_and_set_word(parent, PCI_EXP_LNKCTL, - PCI_EXP_LNKCTL_ASPMC, 0x0); -} - static void aspm_enable(struct hfi1_devdata *dd) { if (dd->aspm_enabled || aspm_mode == ASPM_MODE_DISABLED || !dd->aspm_supported) return; - aspm_hw_enable_l1(dd); + pci_enable_link_state(dd->pcidev, PCI_EXP_LNKCTL_ASPM_L1); dd->aspm_enabled = true; } @@ -101,7 +69,7 @@ static void aspm_disable(struct hfi1_devdata *dd) if (!dd->aspm_enabled || aspm_mode == ASPM_MODE_ENABLED) return; - aspm_hw_disable_l1(dd); + pci_disable_link_state(dd->pcidev, PCIE_LINK_STATE_L0S | PCIE_LINK_STATE_L1); dd->aspm_enabled = false; } @@ -254,7 +222,7 @@ void aspm_init(struct hfi1_devdata *dd) /* Start with ASPM disabled */ aspm_hw_set_l1_ent_latency(dd); dd->aspm_enabled = false; - aspm_hw_disable_l1(dd); + pci_disable_link_state(dd->pcidev, PCIE_LINK_STATE_L0S | PCIE_LINK_STATE_L1); /* Now turn on ASPM if configured */ aspm_enable_all(dd); diff --git a/drivers/infiniband/hw/hfi1/pcie.c b/drivers/infiniband/hw/hfi1/pcie.c index 08732e1ac966..767f6cb770b6 100644 --- a/drivers/infiniband/hw/hfi1/pcie.c +++ b/drivers/infiniband/hw/hfi1/pcie.c @@ -1182,7 +1182,7 @@ int do_pcie_gen3_transition(struct hfi1_devdata *dd) * will be enabled if required later */ dd_dev_info(dd, "%s: clearing ASPM\n", __func__); - aspm_hw_disable_l1(dd); + pci_disable_link_state(dd->pcidev, PCIE_LINK_STATE_L0S | PCIE_LINK_STATE_L1); /* * step 5f: clear DirectSpeedChange