From patchwork Tue Oct 27 02:57:03 2020 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Kuppuswamy Sathyanarayanan X-Patchwork-Id: 11859281 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 5484E697 for ; Tue, 27 Oct 2020 02:57:19 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id 3B6D020872 for ; Tue, 27 Oct 2020 02:57:19 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S2408680AbgJ0C5S (ORCPT ); Mon, 26 Oct 2020 22:57:18 -0400 Received: from mga01.intel.com ([192.55.52.88]:23076 "EHLO mga01.intel.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S2408598AbgJ0C5Q (ORCPT ); Mon, 26 Oct 2020 22:57:16 -0400 IronPort-SDR: mpiP+4fqWBb9OVTFv6dwPfuWK7qQF/w4mjckbNUA/rRrGYQFb7RX5yw4CY6A3j4zasv+PuK3eT p40ivEZGmEGQ== X-IronPort-AV: E=McAfee;i="6000,8403,9786"; a="185753252" X-IronPort-AV: E=Sophos;i="5.77,422,1596524400"; d="scan'208";a="185753252" X-Amp-Result: SKIPPED(no attachment in message) X-Amp-File-Uploaded: False Received: from orsmga006.jf.intel.com ([10.7.209.51]) by fmsmga101.fm.intel.com with ESMTP/TLS/ECDHE-RSA-AES256-GCM-SHA384; 26 Oct 2020 19:57:15 -0700 IronPort-SDR: XEDrDogb+1+OgN5uwZqPSSDBO/QpjW/LZMhiJ40xeng5Wff2RVlF6QC841Lwml3mGRwB0gBIDl 2LlYvxJc4/jg== X-IronPort-AV: E=Sophos;i="5.77,422,1596524400"; d="scan'208";a="322772466" Received: from dhrubajy-mobl.amr.corp.intel.com (HELO skuppusw-mobl5.amr.corp.intel.com) ([10.254.101.53]) by orsmga006-auth.jf.intel.com with ESMTP/TLS/ECDHE-RSA-AES256-GCM-SHA384; 26 Oct 2020 19:57:15 -0700 From: Kuppuswamy Sathyanarayanan To: bhelgaas@google.com Cc: linux-pci@vger.kernel.org, linux-kernel@vger.kernel.org, ashok.raj@intel.com, sathyanarayanan.kuppuswamy@linux.intel.com, knsathya@kernel.org Subject: [PATCH v11 0/5] Simplify PCIe native ownership detection logic Date: Mon, 26 Oct 2020 19:57:03 -0700 Message-Id: X-Mailer: git-send-email 2.17.1 Precedence: bulk List-ID: X-Mailing-List: linux-pci@vger.kernel.org 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 v10: * Addressed format issue reported by lkp test. Changes since v9: * Rebased on top of v5.10-rc1 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 | 39 +++++++++++++++++++++++-------- 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, 44 insertions(+), 30 deletions(-)