From: Kai-Heng Feng <kai.heng.feng@canonical.com> To: bhelgaas@google.com Cc: Kai-Heng Feng <kai.heng.feng@canonical.com>, Russell Currey <ruscur@russell.cc>, "Oliver O'Halloran" <oohall@gmail.com>, Lu Baolu <baolu.lu@linux.intel.com>, Mika Westerberg <mika.westerberg@linux.intel.com>, Lalithambika Krishnakumar <lalithambika.krishnakumar@intel.com>, Joerg Roedel <jroedel@suse.de>, linuxppc-dev@lists.ozlabs.org (open list:PCI ENHANCED ERROR HANDLING (EEH) FOR POWERPC), linux-pci@vger.kernel.org (open list:PCI SUBSYSTEM), linux-kernel@vger.kernel.org (open list) Subject: [PATCH 2/2] PCI/DPC: Disable DPC interrupt during suspend Date: Thu, 28 Jan 2021 01:31:01 +0800 [thread overview] Message-ID: <20210127173101.446940-2-kai.heng.feng@canonical.com> (raw) In-Reply-To: <20210127173101.446940-1-kai.heng.feng@canonical.com> Commit 50310600ebda ("iommu/vt-d: Enable PCI ACS for platform opt in hint") enables ACS, and some platforms lose its NVMe after resume from firmware: [ 50.947816] pcieport 0000:00:1b.0: DPC: containment event, status:0x1f01 source:0x0000 [ 50.947817] pcieport 0000:00:1b.0: DPC: unmasked uncorrectable error detected [ 50.947829] pcieport 0000:00:1b.0: PCIe Bus Error: severity=Uncorrected (Non-Fatal), type=Transaction Layer, (Receiver ID) [ 50.947830] pcieport 0000:00:1b.0: device [8086:06ac] error status/mask=00200000/00010000 [ 50.947831] pcieport 0000:00:1b.0: [21] ACSViol (First) [ 50.947841] pcieport 0000:00:1b.0: AER: broadcast error_detected message [ 50.947843] nvme nvme0: frozen state error detected, reset controller Like what previous patch does to AER, introduce new helpers to disable DPC interrupt and enable it on system suspend and resume, respectively. Bugzilla: https://bugzilla.kernel.org/show_bug.cgi?id=209149 Fixes: 50310600ebda ("iommu/vt-d: Enable PCI ACS for platform opt in hint") Signed-off-by: Kai-Heng Feng <kai.heng.feng@canonical.com> --- drivers/pci/pcie/dpc.c | 49 ++++++++++++++++++++++++++++++++---------- 1 file changed, 38 insertions(+), 11 deletions(-) diff --git a/drivers/pci/pcie/dpc.c b/drivers/pci/pcie/dpc.c index e05aba86a317..d12289cb5d44 100644 --- a/drivers/pci/pcie/dpc.c +++ b/drivers/pci/pcie/dpc.c @@ -279,6 +279,28 @@ void pci_dpc_init(struct pci_dev *pdev) } } +static void dpc_enable(struct pcie_device *dev) +{ + struct pci_dev *pdev = dev->port; + u16 cap, ctl; + + pci_read_config_word(pdev, pdev->dpc_cap + PCI_EXP_DPC_CAP, &cap); + pci_read_config_word(pdev, pdev->dpc_cap + PCI_EXP_DPC_CTL, &ctl); + + ctl = (ctl & 0xfff4) | PCI_EXP_DPC_CTL_EN_FATAL | PCI_EXP_DPC_CTL_INT_EN; + pci_write_config_word(pdev, pdev->dpc_cap + PCI_EXP_DPC_CTL, ctl); +} + +static void dpc_disable(struct pcie_device *dev) +{ + struct pci_dev *pdev = dev->port; + u16 ctl; + + pci_read_config_word(pdev, pdev->dpc_cap + PCI_EXP_DPC_CTL, &ctl); + ctl &= ~(PCI_EXP_DPC_CTL_EN_FATAL | PCI_EXP_DPC_CTL_INT_EN); + pci_write_config_word(pdev, pdev->dpc_cap + PCI_EXP_DPC_CTL, ctl); +} + #define FLAG(x, y) (((x) & (y)) ? '+' : '-') static int dpc_probe(struct pcie_device *dev) { @@ -299,11 +321,7 @@ static int dpc_probe(struct pcie_device *dev) return status; } - pci_read_config_word(pdev, pdev->dpc_cap + PCI_EXP_DPC_CAP, &cap); - pci_read_config_word(pdev, pdev->dpc_cap + PCI_EXP_DPC_CTL, &ctl); - - ctl = (ctl & 0xfff4) | PCI_EXP_DPC_CTL_EN_FATAL | PCI_EXP_DPC_CTL_INT_EN; - pci_write_config_word(pdev, pdev->dpc_cap + PCI_EXP_DPC_CTL, ctl); + dpc_enable(dev); pci_info(pdev, "enabled with IRQ %d\n", dev->irq); pci_info(pdev, "error containment capabilities: Int Msg #%d, RPExt%c PoisonedTLP%c SwTrigger%c RP PIO Log %d, DL_ActiveErr%c\n", @@ -316,14 +334,21 @@ static int dpc_probe(struct pcie_device *dev) return status; } -static void dpc_remove(struct pcie_device *dev) +static int dpc_suspend(struct pcie_device *dev) { - struct pci_dev *pdev = dev->port; - u16 ctl; + dpc_disable(dev); + return 0; +} - pci_read_config_word(pdev, pdev->dpc_cap + PCI_EXP_DPC_CTL, &ctl); - ctl &= ~(PCI_EXP_DPC_CTL_EN_FATAL | PCI_EXP_DPC_CTL_INT_EN); - pci_write_config_word(pdev, pdev->dpc_cap + PCI_EXP_DPC_CTL, ctl); +static int dpc_resume(struct pcie_device *dev) +{ + dpc_enable(dev); + return 0; +} + +static void dpc_remove(struct pcie_device *dev) +{ + dpc_disable(dev); } static struct pcie_port_service_driver dpcdriver = { @@ -331,6 +356,8 @@ static struct pcie_port_service_driver dpcdriver = { .port_type = PCIE_ANY_PORT, .service = PCIE_PORT_SERVICE_DPC, .probe = dpc_probe, + .suspend = dpc_suspend, + .resume = dpc_resume, .remove = dpc_remove, }; -- 2.29.2
WARNING: multiple messages have this Message-ID (diff)
From: Kai-Heng Feng <kai.heng.feng@canonical.com> To: bhelgaas@google.com Cc: Joerg Roedel <jroedel@suse.de>, "open list:PCI ENHANCED ERROR HANDLING EEH FOR POWERPC" <linuxppc-dev@lists.ozlabs.org>, "open list:PCI SUBSYSTEM" <linux-pci@vger.kernel.org>, open list <linux-kernel@vger.kernel.org>, Lalithambika Krishnakumar <lalithambika.krishnakumar@intel.com>, Kai-Heng Feng <kai.heng.feng@canonical.com>, Oliver O'Halloran <oohall@gmail.com>, Mika Westerberg <mika.westerberg@linux.intel.com>, Lu Baolu <baolu.lu@linux.intel.com> Subject: [PATCH 2/2] PCI/DPC: Disable DPC interrupt during suspend Date: Thu, 28 Jan 2021 01:31:01 +0800 [thread overview] Message-ID: <20210127173101.446940-2-kai.heng.feng@canonical.com> (raw) In-Reply-To: <20210127173101.446940-1-kai.heng.feng@canonical.com> Commit 50310600ebda ("iommu/vt-d: Enable PCI ACS for platform opt in hint") enables ACS, and some platforms lose its NVMe after resume from firmware: [ 50.947816] pcieport 0000:00:1b.0: DPC: containment event, status:0x1f01 source:0x0000 [ 50.947817] pcieport 0000:00:1b.0: DPC: unmasked uncorrectable error detected [ 50.947829] pcieport 0000:00:1b.0: PCIe Bus Error: severity=Uncorrected (Non-Fatal), type=Transaction Layer, (Receiver ID) [ 50.947830] pcieport 0000:00:1b.0: device [8086:06ac] error status/mask=00200000/00010000 [ 50.947831] pcieport 0000:00:1b.0: [21] ACSViol (First) [ 50.947841] pcieport 0000:00:1b.0: AER: broadcast error_detected message [ 50.947843] nvme nvme0: frozen state error detected, reset controller Like what previous patch does to AER, introduce new helpers to disable DPC interrupt and enable it on system suspend and resume, respectively. Bugzilla: https://bugzilla.kernel.org/show_bug.cgi?id=209149 Fixes: 50310600ebda ("iommu/vt-d: Enable PCI ACS for platform opt in hint") Signed-off-by: Kai-Heng Feng <kai.heng.feng@canonical.com> --- drivers/pci/pcie/dpc.c | 49 ++++++++++++++++++++++++++++++++---------- 1 file changed, 38 insertions(+), 11 deletions(-) diff --git a/drivers/pci/pcie/dpc.c b/drivers/pci/pcie/dpc.c index e05aba86a317..d12289cb5d44 100644 --- a/drivers/pci/pcie/dpc.c +++ b/drivers/pci/pcie/dpc.c @@ -279,6 +279,28 @@ void pci_dpc_init(struct pci_dev *pdev) } } +static void dpc_enable(struct pcie_device *dev) +{ + struct pci_dev *pdev = dev->port; + u16 cap, ctl; + + pci_read_config_word(pdev, pdev->dpc_cap + PCI_EXP_DPC_CAP, &cap); + pci_read_config_word(pdev, pdev->dpc_cap + PCI_EXP_DPC_CTL, &ctl); + + ctl = (ctl & 0xfff4) | PCI_EXP_DPC_CTL_EN_FATAL | PCI_EXP_DPC_CTL_INT_EN; + pci_write_config_word(pdev, pdev->dpc_cap + PCI_EXP_DPC_CTL, ctl); +} + +static void dpc_disable(struct pcie_device *dev) +{ + struct pci_dev *pdev = dev->port; + u16 ctl; + + pci_read_config_word(pdev, pdev->dpc_cap + PCI_EXP_DPC_CTL, &ctl); + ctl &= ~(PCI_EXP_DPC_CTL_EN_FATAL | PCI_EXP_DPC_CTL_INT_EN); + pci_write_config_word(pdev, pdev->dpc_cap + PCI_EXP_DPC_CTL, ctl); +} + #define FLAG(x, y) (((x) & (y)) ? '+' : '-') static int dpc_probe(struct pcie_device *dev) { @@ -299,11 +321,7 @@ static int dpc_probe(struct pcie_device *dev) return status; } - pci_read_config_word(pdev, pdev->dpc_cap + PCI_EXP_DPC_CAP, &cap); - pci_read_config_word(pdev, pdev->dpc_cap + PCI_EXP_DPC_CTL, &ctl); - - ctl = (ctl & 0xfff4) | PCI_EXP_DPC_CTL_EN_FATAL | PCI_EXP_DPC_CTL_INT_EN; - pci_write_config_word(pdev, pdev->dpc_cap + PCI_EXP_DPC_CTL, ctl); + dpc_enable(dev); pci_info(pdev, "enabled with IRQ %d\n", dev->irq); pci_info(pdev, "error containment capabilities: Int Msg #%d, RPExt%c PoisonedTLP%c SwTrigger%c RP PIO Log %d, DL_ActiveErr%c\n", @@ -316,14 +334,21 @@ static int dpc_probe(struct pcie_device *dev) return status; } -static void dpc_remove(struct pcie_device *dev) +static int dpc_suspend(struct pcie_device *dev) { - struct pci_dev *pdev = dev->port; - u16 ctl; + dpc_disable(dev); + return 0; +} - pci_read_config_word(pdev, pdev->dpc_cap + PCI_EXP_DPC_CTL, &ctl); - ctl &= ~(PCI_EXP_DPC_CTL_EN_FATAL | PCI_EXP_DPC_CTL_INT_EN); - pci_write_config_word(pdev, pdev->dpc_cap + PCI_EXP_DPC_CTL, ctl); +static int dpc_resume(struct pcie_device *dev) +{ + dpc_enable(dev); + return 0; +} + +static void dpc_remove(struct pcie_device *dev) +{ + dpc_disable(dev); } static struct pcie_port_service_driver dpcdriver = { @@ -331,6 +356,8 @@ static struct pcie_port_service_driver dpcdriver = { .port_type = PCIE_ANY_PORT, .service = PCIE_PORT_SERVICE_DPC, .probe = dpc_probe, + .suspend = dpc_suspend, + .resume = dpc_resume, .remove = dpc_remove, }; -- 2.29.2
next prev parent reply other threads:[~2021-01-27 17:34 UTC|newest] Thread overview: 18+ messages / expand[flat|nested] mbox.gz Atom feed top 2021-01-27 17:31 [PATCH 1/2] PCI/AER: Disable AER interrupt during suspend Kai-Heng Feng 2021-01-27 17:31 ` Kai-Heng Feng 2021-01-27 17:31 ` Kai-Heng Feng [this message] 2021-01-27 17:31 ` [PATCH 2/2] PCI/DPC: Disable DPC " Kai-Heng Feng 2021-01-27 20:50 ` [PATCH 1/2] PCI/AER: Disable AER " Bjorn Helgaas 2021-01-27 20:50 ` Bjorn Helgaas 2021-01-28 4:09 ` Kai-Heng Feng 2021-01-28 4:09 ` Kai-Heng Feng 2021-02-04 23:27 ` Bjorn Helgaas 2021-02-04 23:27 ` Bjorn Helgaas 2021-02-05 15:17 ` Kai-Heng Feng 2021-02-05 15:17 ` Kai-Heng Feng 2021-07-22 22:23 ` Bjorn Helgaas 2021-07-22 22:23 ` Bjorn Helgaas 2021-07-23 5:24 ` Christoph Hellwig 2021-07-23 5:24 ` Christoph Hellwig 2021-07-23 7:05 ` Kai-Heng Feng 2021-07-23 7:05 ` Kai-Heng Feng
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