From patchwork Tue Sep 22 20:54:27 2020 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Kuppuswamy Sathyanarayanan X-Patchwork-Id: 11793103 Return-Path: Received: from mail.kernel.org (pdx-korg-mail-1.web.codeaurora.org [172.30.200.123]) by pdx-korg-patchwork-2.web.codeaurora.org (Postfix) with ESMTP id BE60759D for ; Tue, 22 Sep 2020 20:54:46 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id 8AD8F2371F for ; Tue, 22 Sep 2020 20:54:46 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1726583AbgIVUyq (ORCPT ); Tue, 22 Sep 2020 16:54:46 -0400 Received: from mga05.intel.com ([192.55.52.43]:11102 "EHLO mga05.intel.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1726589AbgIVUyp (ORCPT ); Tue, 22 Sep 2020 16:54:45 -0400 IronPort-SDR: IbWLdy+HvZ5oipwaxgweJedzkWF//iyW7AuZ1cwCDDucuXcg0SE+U7dqrOedrvzoH7aOwv4tEn mj8Kbx96HNgA== X-IronPort-AV: E=McAfee;i="6000,8403,9752"; a="245542541" X-IronPort-AV: E=Sophos;i="5.77,292,1596524400"; d="scan'208";a="245542541" X-Amp-Result: SKIPPED(no attachment in message) X-Amp-File-Uploaded: False Received: from fmsmga006.fm.intel.com ([10.253.24.20]) by fmsmga105.fm.intel.com with ESMTP/TLS/ECDHE-RSA-AES256-GCM-SHA384; 22 Sep 2020 13:54:42 -0700 IronPort-SDR: 5FCHO4veOMnmQr/vYqzSWcHLfbRAnshMAy/WKfU6qLiQv7valflFUNp3exXXy/X0Y6le81VU8n QaAs1eL+vRJA== X-IronPort-AV: E=Sophos;i="5.77,292,1596524400"; d="scan'208";a="510718929" Received: from fkhoshne-mobl1.amr.corp.intel.com (HELO skuppusw-mobl5.amr.corp.intel.com) ([10.255.230.168]) by fmsmga006-auth.fm.intel.com with ESMTP/TLS/ECDHE-RSA-AES256-GCM-SHA384; 22 Sep 2020 13:54:41 -0700 From: sathyanarayanan.kuppuswamy@linux.intel.com To: bhelgaas@google.com Cc: linux-pci@vger.kernel.org, linux-kernel@vger.kernel.org, ashok.raj@intel.com, sathyanarayanan.kuppuswamy@linux.intel.com Subject: [PATCH v9 0/5] Simplify PCIe native ownership detection logic Date: Tue, 22 Sep 2020 13:54:27 -0700 Message-Id: X-Mailer: git-send-email 2.17.1 Precedence: bulk List-ID: X-Mailing-List: linux-pci@vger.kernel.org From: Kuppuswamy Sathyanarayanan Currently, PCIe capabilities ownership status is detected by verifying the status of pcie_ports_native, pcie_ports_dpc_native and _OSC negotiated results (cached in struct pci_host_bridge ->native_* members). But this logic can be simplified, and we can use only struct pci_host_bridge ->native_* members to detect it. This patchset removes the distributed checks for pcie_ports_native, pcie_ports_dpc_native parameters. Changes since v8: * Simplified setting _OSC ownwership logic * Moved bridge->native_ltr out of #ifdef CONFIG_PCIEPORTBUS. Changes since v7: * Fixed "fix array_size.cocci warnings". Changes since v6: * Created new patch for CONFIG_PCIEPORTBUS check in pci_init_host_bridge(). * Added warning message for a case when pcie_ports_native overrides _OSC negotiation result. Changes since v5: * Rebased on top of v5.8-rc1 Changes since v4: * Changed the patch set title (Original link: https://lkml.org/lkml/2020/5/26/1710) * Added AER/DPC dependency logic cleanup fixes. Kuppuswamy Sathyanarayanan (5): PCI: Conditionally initialize host bridge native_* members ACPI/PCI: Ignore _OSC negotiation result if pcie_ports_native is set. ACPI/PCI: Ignore _OSC DPC negotiation result if pcie_ports_dpc_native is set. PCI/portdrv: Remove redundant pci_aer_available() check in DPC enable logic PCI/DPC: Move AER/DPC dependency checks out of DPC driver drivers/acpi/pci_root.c | 37 ++++++++++++++++++++++--------- drivers/pci/hotplug/pciehp_core.c | 2 +- drivers/pci/pci-acpi.c | 3 --- drivers/pci/pcie/aer.c | 2 +- drivers/pci/pcie/dpc.c | 3 --- drivers/pci/pcie/portdrv.h | 2 -- drivers/pci/pcie/portdrv_core.c | 13 +++++------ drivers/pci/probe.c | 6 +++-- include/linux/acpi.h | 2 ++ include/linux/pci.h | 2 ++ 10 files changed, 42 insertions(+), 30 deletions(-)