From patchwork Fri May 19 21:57:38 2023 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Alex Williamson X-Patchwork-Id: 13248905 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 lists.gnu.org (lists.gnu.org [209.51.188.17]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by smtp.lore.kernel.org (Postfix) with ESMTPS id 58292C77B7A for ; Fri, 19 May 2023 21:59:00 +0000 (UTC) Received: from localhost ([::1] helo=lists1p.gnu.org) by lists.gnu.org with esmtp (Exim 4.90_1) (envelope-from ) id 1q086n-0005yv-K7; Fri, 19 May 2023 17:57:57 -0400 Received: from eggs.gnu.org ([2001:470:142:3::10]) by lists.gnu.org with esmtps (TLS1.2:ECDHE_RSA_AES_256_GCM_SHA384:256) (Exim 4.90_1) (envelope-from ) id 1q086l-0005x7-Lr for qemu-devel@nongnu.org; Fri, 19 May 2023 17:57:55 -0400 Received: from us-smtp-delivery-124.mimecast.com ([170.10.129.124]) by eggs.gnu.org with esmtps (TLS1.2:ECDHE_RSA_AES_256_GCM_SHA384:256) (Exim 4.90_1) (envelope-from ) id 1q086k-0004FL-4Q for qemu-devel@nongnu.org; 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Fri, 19 May 2023 21:57:49 +0000 (UTC) Received: from omen.home.shazbot.org (unknown [10.22.10.168]) by smtp.corp.redhat.com (Postfix) with ESMTP id 52CA6C0004B; Fri, 19 May 2023 21:57:49 +0000 (UTC) From: Alex Williamson To: robin@streamhpc.com, mst@redhat.com, marcel.apfelbaum@gmail.com Cc: Alex Williamson , qemu-devel@nongnu.org Subject: [RFC PATCH 3/4] pcie: Add a PCIe capability version helper Date: Fri, 19 May 2023 15:57:38 -0600 Message-Id: <20230519215739.402729-4-alex.williamson@redhat.com> In-Reply-To: <20230519215739.402729-1-alex.williamson@redhat.com> References: <20230519215739.402729-1-alex.williamson@redhat.com> MIME-Version: 1.0 X-Scanned-By: MIMEDefang 3.1 on 10.11.54.8 Received-SPF: pass client-ip=170.10.129.124; envelope-from=alex.williamson@redhat.com; helo=us-smtp-delivery-124.mimecast.com X-Spam_score_int: -20 X-Spam_score: -2.1 X-Spam_bar: -- X-Spam_report: (-2.1 / 5.0 requ) BAYES_00=-1.9, DKIMWL_WL_HIGH=-0.001, DKIM_SIGNED=0.1, DKIM_VALID=-0.1, DKIM_VALID_AU=-0.1, DKIM_VALID_EF=-0.1, RCVD_IN_DNSWL_NONE=-0.0001, SPF_HELO_NONE=0.001, SPF_PASS=-0.001, T_SCC_BODY_TEXT_LINE=-0.01 autolearn=ham autolearn_force=no X-Spam_action: no action X-BeenThere: qemu-devel@nongnu.org X-Mailman-Version: 2.1.29 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Errors-To: qemu-devel-bounces+qemu-devel=archiver.kernel.org@nongnu.org Sender: qemu-devel-bounces+qemu-devel=archiver.kernel.org@nongnu.org Report the PCIe capability version for a device Signed-off-by: Alex Williamson --- hw/pci/pcie.c | 7 +++++++ include/hw/pci/pcie.h | 1 + 2 files changed, 8 insertions(+) diff --git a/hw/pci/pcie.c b/hw/pci/pcie.c index b8c24cf45f7e..b7f107ed8dd4 100644 --- a/hw/pci/pcie.c +++ b/hw/pci/pcie.c @@ -274,6 +274,13 @@ uint8_t pcie_cap_get_type(const PCIDevice *dev) PCI_EXP_FLAGS_TYPE) >> PCI_EXP_FLAGS_TYPE_SHIFT; } +uint8_t pcie_cap_get_version(const PCIDevice *dev) +{ + uint32_t pos = dev->exp.exp_cap; + assert(pos > 0); + return pci_get_word(dev->config + pos + PCI_EXP_FLAGS) & PCI_EXP_FLAGS_VERS; +} + /* MSI/MSI-X */ /* pci express interrupt message number */ /* 7.8.2 PCI Express Capabilities Register: Interrupt Message Number */ diff --git a/include/hw/pci/pcie.h b/include/hw/pci/pcie.h index 3cc2b159570f..51ab57bc3c50 100644 --- a/include/hw/pci/pcie.h +++ b/include/hw/pci/pcie.h @@ -93,6 +93,7 @@ void pcie_cap_exit(PCIDevice *dev); int pcie_endpoint_cap_v1_init(PCIDevice *dev, uint8_t offset); void pcie_cap_v1_exit(PCIDevice *dev); uint8_t pcie_cap_get_type(const PCIDevice *dev); +uint8_t pcie_cap_get_version(const PCIDevice *dev); void pcie_cap_flags_set_vector(PCIDevice *dev, uint8_t vector); uint8_t pcie_cap_flags_get_vector(PCIDevice *dev);