From: Ethan Zhao <haifeng.zhao@linux.intel.com>
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, iommu@lists.linux.dev,
linux-kernel@vger.kernel.org, linux-pci@vger.kernel.org,
Ethan Zhao <haifeng.zhao@linux.intel.com>,
Haorong Ye <yehaorong@bytedance.com>
Subject: [PATCH v12 1/5] PCI: make pci_dev_is_disconnected() helper public for other drivers
Date: Sun, 28 Jan 2024 22:49:20 -0500 [thread overview]
Message-ID: <20240129034924.817005-2-haifeng.zhao@linux.intel.com> (raw)
In-Reply-To: <20240129034924.817005-1-haifeng.zhao@linux.intel.com>
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 <yehaorong@bytedance.com>
Signed-off-by: Ethan Zhao <haifeng.zhao@linux.intel.com>
---
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 2336a8d1edab..94118c4cff54 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 add9368e6314..19dfe5f16fc9 100644
--- a/include/linux/pci.h
+++ b/include/linux/pci.h
@@ -2512,6 +2512,11 @@ 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,
--
2.31.1
next prev parent reply other threads:[~2024-01-29 3:49 UTC|newest]
Thread overview: 39+ messages / expand[flat|nested] mbox.gz Atom feed top
2024-01-29 3:49 [PATCH v12 0/5] fix vt-d hard lockup when hotplug ATS capable device Ethan Zhao
2024-01-29 3:49 ` Ethan Zhao [this message]
2024-01-29 8:50 ` [PATCH v12 1/5] PCI: make pci_dev_is_disconnected() helper public for other drivers Tian, Kevin
2024-01-30 5:23 ` Ethan Zhao
2024-01-30 5:25 ` Ethan Zhao
2024-01-30 6:23 ` Tian, Kevin
2024-01-29 3:49 ` [PATCH v12 2/5] iommu/vt-d: don't issue ATS Invalidation request when device is disconnected Ethan Zhao
2024-01-29 8:53 ` Tian, Kevin
2024-01-29 9:32 ` Yi Liu
2024-01-30 5:37 ` Ethan Zhao
2024-01-31 4:25 ` Yi Liu
2024-01-31 5:25 ` Ethan Zhao
2024-01-29 3:49 ` [PATCH v12 3/5] iommu/vt-d: simplify parameters of qi_submit_sync() ATS invalidation callers Ethan Zhao
2024-01-29 9:37 ` Yi Liu
2024-01-30 5:43 ` Ethan Zhao
2024-01-29 3:49 ` [PATCH v12 4/5] iommu/vt-d: pass pdev parameter for qi_check_fault() and refactor callers Ethan Zhao
2024-01-29 8:58 ` Tian, Kevin
2024-01-30 7:30 ` Ethan Zhao
2024-02-08 7:15 ` Dan Carpenter
2024-02-09 2:08 ` Ethan Zhao
2024-01-29 3:49 ` [PATCH v12 5/5] iommu/vt-d: improve ITE fault handling if target device isn't present Ethan Zhao
2024-01-29 9:06 ` Tian, Kevin
2024-01-29 9:21 ` Yi Liu
2024-01-30 5:12 ` Ethan Zhao
2024-01-30 6:22 ` Tian, Kevin
2024-01-30 8:15 ` Ethan Zhao
2024-01-30 8:43 ` Tian, Kevin
2024-01-30 9:13 ` Ethan Zhao
2024-01-30 9:24 ` Tian, Kevin
2024-01-31 5:42 ` Ethan Zhao
2024-01-30 16:29 ` Jason Gunthorpe
2024-01-31 6:21 ` Baolu Lu
2024-02-01 19:34 ` Jason Gunthorpe
2024-02-15 7:37 ` Baolu Lu
2024-01-29 14:48 ` Baolu Lu
2024-01-30 3:28 ` Tian, Kevin
2024-01-30 8:43 ` Ethan Zhao
2024-01-29 9:33 ` Yi Liu
2024-01-29 5:16 ` [PATCH v12 0/5] fix vt-d hard lockup when hotplug ATS capable device Ethan Zhao
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