From patchwork Thu Feb 22 09:02:49 2024 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Ethan Zhao X-Patchwork-Id: 13566921 Received: from mgamail.intel.com (mgamail.intel.com [198.175.65.9]) (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 A54F52261F; Thu, 22 Feb 2024 09:03:18 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=198.175.65.9 ARC-Seal: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1708592600; cv=none; b=bgAmgNy09GXei7DLfkBYHE93Z6G07sW5la1NoJgyaA68slq9vZ+PIepaFWMGvwIHw3hHmbeCnQKsDRlVSNe2jwXXIzqtRIIPMZfdBC7XzUcq69f7Hl4aUfPE+jUumb63GbddupmokzfP0U8IgsiDKMbieOjYoCuXkwoP+5Dt2Ys= ARC-Message-Signature: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1708592600; c=relaxed/simple; bh=qGvJdjdFOeQfZsaVurZBwtpkSGEkZOdq9FP4c2dHoM4=; h=From:To:Cc:Subject:Date:Message-Id:In-Reply-To:References: MIME-Version; b=To5J69wEInxLDajnhYrGD4sWKv0/CMO1Xf7bMJLn+GgJRhdOeZnHJh4D//7Zx8gRmSD0kEMILgCXwH0R8mLa92mrzZF2YEBiGE5rXHZhZC6sOUULvFMC2eQK1EgrVcLUWezV679hpQsV7vlnEDucN4Iv0v/RyS/fL+GUxHqbdjY= ARC-Authentication-Results: i=1; smtp.subspace.kernel.org; dmarc=pass (p=none dis=none) header.from=linux.intel.com; spf=none smtp.mailfrom=linux.intel.com; dkim=pass (2048-bit key) header.d=intel.com header.i=@intel.com header.b=jPtVE1rM; arc=none smtp.client-ip=198.175.65.9 Authentication-Results: smtp.subspace.kernel.org; dmarc=pass (p=none dis=none) header.from=linux.intel.com Authentication-Results: smtp.subspace.kernel.org; spf=none smtp.mailfrom=linux.intel.com Authentication-Results: smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=intel.com header.i=@intel.com header.b="jPtVE1rM" DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=intel.com; i=@intel.com; q=dns/txt; s=Intel; t=1708592599; x=1740128599; h=from:to:cc:subject:date:message-id:in-reply-to: references:mime-version:content-transfer-encoding; bh=qGvJdjdFOeQfZsaVurZBwtpkSGEkZOdq9FP4c2dHoM4=; b=jPtVE1rMxKHh2Ugo3xYKE74tM0fGb/N47Igw5vE6QKjmAqbwzWy5ah8F vCeoD31d4w92b8bJ+dxNoFj+C5+2XJb29DFfm/8von0aL2p7ouWok9UH9 GOo+ap0J8tGGdQEH/Rh70MbD45rwnco6BAoifXnPRKqjqkvu3taT0fX0q nreS5Ho0hsULeVVTEB03xvRF4xGzbRimA7tW47X2gvZYSZnWfIEdrRDwS 1KXkHYuHmFDqz0+0HbeGi5gjOAoHtcaJPFxpoUu+Yl2VGGm6KrmwN+oVq SV91V0GeP+r6PK9IrIO5XRTq4tjhLNU4MqokRc5mYS2E4yO9eTE7dFNpm A==; X-IronPort-AV: E=McAfee;i="6600,9927,10991"; a="25264451" X-IronPort-AV: E=Sophos;i="6.06,177,1705392000"; d="scan'208";a="25264451" Received: from orviesa003.jf.intel.com ([10.64.159.143]) by orvoesa101.jf.intel.com with ESMTP/TLS/ECDHE-RSA-AES256-GCM-SHA384; 22 Feb 2024 01:03:19 -0800 X-ExtLoop1: 1 X-IronPort-AV: E=Sophos;i="6.06,177,1705392000"; d="scan'208";a="10122632" Received: from unknown (HELO ply01-vm-store.amr.corp.intel.com) ([10.238.153.201]) by orviesa003.jf.intel.com with ESMTP; 22 Feb 2024 01:03:14 -0800 From: Ethan Zhao To: baolu.lu@linux.intel.com, bhelgaas@google.com, robin.murphy@arm.com, jgg@ziepe.ca Cc: kevin.tian@intel.com, dwmw2@infradead.org, will@kernel.org, lukas@wunner.de, yi.l.liu@intel.com, dan.carpenter@linaro.org, iommu@lists.linux.dev, linux-kernel@vger.kernel.org, linux-pci@vger.kernel.org, Ethan Zhao , Haorong Ye Subject: [PATCH v13 1/3] PCI: make pci_dev_is_disconnected() helper public for other drivers Date: Thu, 22 Feb 2024 04:02:49 -0500 Message-Id: <20240222090251.2849702-2-haifeng.zhao@linux.intel.com> X-Mailer: git-send-email 2.31.1 In-Reply-To: <20240222090251.2849702-1-haifeng.zhao@linux.intel.com> References: <20240222090251.2849702-1-haifeng.zhao@linux.intel.com> Precedence: bulk X-Mailing-List: linux-pci@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Make pci_dev_is_disconnected() public so that it can be called from Intel VT-d driver to quickly fix/workaround the surprise removal unplug hang issue for those ATS capable devices on PCIe switch downstream hotplug capable ports. Beside pci_device_is_present() function, this one has no config space space access, so is light enough to optimize the normal pure surprise removal and safe removal flow. Tested-by: Haorong Ye Signed-off-by: Ethan Zhao Reviewed-by: Dan Carpenter Acked-by: Bjorn Helgaas --- drivers/pci/pci.h | 5 ----- include/linux/pci.h | 5 +++++ 2 files changed, 5 insertions(+), 5 deletions(-) diff --git a/drivers/pci/pci.h b/drivers/pci/pci.h index e9750b1b19ba..bfc56f7bee1c 100644 --- a/drivers/pci/pci.h +++ b/drivers/pci/pci.h @@ -368,11 +368,6 @@ static inline int pci_dev_set_disconnected(struct pci_dev *dev, void *unused) return 0; } -static inline bool pci_dev_is_disconnected(const struct pci_dev *dev) -{ - return dev->error_state == pci_channel_io_perm_failure; -} - /* pci_dev priv_flags */ #define PCI_DEV_ADDED 0 #define PCI_DPC_RECOVERED 1 diff --git a/include/linux/pci.h b/include/linux/pci.h index 7ab0d13672da..213109d3c601 100644 --- a/include/linux/pci.h +++ b/include/linux/pci.h @@ -2517,6 +2517,11 @@ static inline struct pci_dev *pcie_find_root_port(struct pci_dev *dev) return NULL; } +static inline bool pci_dev_is_disconnected(const struct pci_dev *dev) +{ + return dev->error_state == pci_channel_io_perm_failure; +} + void pci_request_acs(void); bool pci_acs_enabled(struct pci_dev *pdev, u16 acs_flags); bool pci_acs_path_enabled(struct pci_dev *start,