diff options
| author | Keith Busch <keith.busch@intel.com> | 2018-07-16 17:05:02 -0500 |
|---|---|---|
| committer | Bjorn Helgaas <bhelgaas@google.com> | 2018-07-19 16:21:01 -0500 |
| commit | 0c27e28f77179548aa3d25a8f7a3dda22fd3e080 (patch) | |
| tree | 5a4e4361328fb220d8910d6d6283f967025df083 /drivers/pci/pcie/dpc.c | |
| parent | f8d46c89c86fa11c60c05e101a3a4c7458623103 (diff) | |
| download | linux-0c27e28f77179548aa3d25a8f7a3dda22fd3e080.tar.bz2 | |
PCI/DPC: Defer event handling to work queue
Move all event handling to the existing work queue, which will
make it simpler to pass event information to the handler.
Signed-off-by: Keith Busch <keith.busch@intel.com>
Signed-off-by: Bjorn Helgaas <bhelgaas@google.com>
Reviewed-by: Sinan Kaya <okaya@kernel.org>
Reviewed-by: Oza Pawandeep <poza@codeaurora.org>
Diffstat (limited to 'drivers/pci/pcie/dpc.c')
| -rw-r--r-- | drivers/pci/pcie/dpc.c | 44 |
1 files changed, 20 insertions, 24 deletions
diff --git a/drivers/pci/pcie/dpc.c b/drivers/pci/pcie/dpc.c index 972aac892846..5f5fac279c75 100644 --- a/drivers/pci/pcie/dpc.c +++ b/drivers/pci/pcie/dpc.c @@ -108,14 +108,6 @@ static pci_ers_result_t dpc_reset_link(struct pci_dev *pdev) return PCI_ERS_RESULT_RECOVERED; } -static void dpc_work(struct work_struct *work) -{ - struct dpc_dev *dpc = container_of(work, struct dpc_dev, work); - struct pci_dev *pdev = dpc->dev->port; - - /* We configure DPC so it only triggers on ERR_FATAL */ - pcie_do_fatal_recovery(pdev, PCIE_PORT_SERVICE_DPC); -} static void dpc_process_rp_pio_error(struct dpc_dev *dpc) { @@ -174,33 +166,21 @@ static void dpc_process_rp_pio_error(struct dpc_dev *dpc) } } -static irqreturn_t dpc_irq(int irq, void *context) +static void dpc_work(struct work_struct *work) { - struct dpc_dev *dpc = (struct dpc_dev *)context; + struct dpc_dev *dpc = container_of(work, struct dpc_dev, work); struct pci_dev *pdev = dpc->dev->port; struct device *dev = &dpc->dev->device; u16 cap = dpc->cap_pos, status, source, reason, ext_reason; pci_read_config_word(pdev, cap + PCI_EXP_DPC_STATUS, &status); - - if (!(status & PCI_EXP_DPC_STATUS_INTERRUPT) || status == (u16)(~0)) - return IRQ_NONE; - - if (!(status & PCI_EXP_DPC_STATUS_TRIGGER)) { - pci_write_config_word(pdev, cap + PCI_EXP_DPC_STATUS, - PCI_EXP_DPC_STATUS_INTERRUPT); - return IRQ_HANDLED; - } - - pci_read_config_word(pdev, cap + PCI_EXP_DPC_SOURCE_ID, - &source); + pci_read_config_word(pdev, cap + PCI_EXP_DPC_SOURCE_ID, &source); dev_info(dev, "DPC containment event, status:%#06x source:%#06x\n", - status, source); + status, source); reason = (status & PCI_EXP_DPC_STATUS_TRIGGER_RSN) >> 1; ext_reason = (status & PCI_EXP_DPC_STATUS_TRIGGER_RSN_EXT) >> 5; - dev_warn(dev, "DPC %s detected, remove downstream devices\n", (reason == 0) ? "unmasked uncorrectable error" : (reason == 1) ? "ERR_NONFATAL" : @@ -208,10 +188,26 @@ static irqreturn_t dpc_irq(int irq, void *context) (ext_reason == 0) ? "RP PIO error" : (ext_reason == 1) ? "software trigger" : "reserved error"); + /* show RP PIO error detail information */ if (dpc->rp_extensions && reason == 3 && ext_reason == 0) dpc_process_rp_pio_error(dpc); + /* We configure DPC so it only triggers on ERR_FATAL */ + pcie_do_fatal_recovery(pdev, PCIE_PORT_SERVICE_DPC); +} + +static irqreturn_t dpc_irq(int irq, void *context) +{ + struct dpc_dev *dpc = (struct dpc_dev *)context; + struct pci_dev *pdev = dpc->dev->port; + u16 cap = dpc->cap_pos, status; + + pci_read_config_word(pdev, cap + PCI_EXP_DPC_STATUS, &status); + + if (!(status & PCI_EXP_DPC_STATUS_INTERRUPT) || status == (u16)(~0)) + return IRQ_NONE; + pci_write_config_word(pdev, cap + PCI_EXP_DPC_STATUS, PCI_EXP_DPC_STATUS_INTERRUPT); if (status & PCI_EXP_DPC_STATUS_TRIGGER) |