From: Bjorn Helgaas Date: Tue, 16 Jan 2018 23:37:50 +0000 (-0600) Subject: PCI/DPC: Add and use DPC Status register field definitions X-Git-Tag: for-linus-20180210^2~14^2~17^2~1 X-Git-Url: https://git.kernel.dk/?a=commitdiff_plain;h=01060e3d4e423146ecf9d308814e16a357671ddf;p=linux-2.6-block.git PCI/DPC: Add and use DPC Status register field definitions Add definitions for DPC Status register fields and use them in the code. No functional change intended. Signed-off-by: Bjorn Helgaas Reviewed-by: Keith Busch Reviewed-by: Sinan Kaya --- diff --git a/drivers/pci/pcie/pcie-dpc.c b/drivers/pci/pcie/pcie-dpc.c index 0f4eb6111ab4..7eb9bc7d4bfd 100644 --- a/drivers/pci/pcie/pcie-dpc.c +++ b/drivers/pci/pcie/pcie-dpc.c @@ -211,8 +211,8 @@ static irqreturn_t dpc_irq(int irq, void *context) dev_info(dev, "DPC containment event, status:%#06x source:%#06x\n", status, source); - reason = (status >> 1) & 0x3; - ext_reason = (status >> 5) & 0x3; + 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" : diff --git a/include/uapi/linux/pci_regs.h b/include/uapi/linux/pci_regs.h index 70c2b2ade048..970a0dc535c4 100644 --- a/include/uapi/linux/pci_regs.h +++ b/include/uapi/linux/pci_regs.h @@ -979,8 +979,10 @@ #define PCI_EXP_DPC_STATUS 8 /* DPC Status */ #define PCI_EXP_DPC_STATUS_TRIGGER 0x01 /* Trigger Status */ +#define PCI_EXP_DPC_STATUS_TRIGGER_RSN 0x06 /* Trigger Reason */ #define PCI_EXP_DPC_STATUS_INTERRUPT 0x08 /* Interrupt Status */ #define PCI_EXP_DPC_RP_BUSY 0x10 /* Root Port Busy */ +#define PCI_EXP_DPC_STATUS_TRIGGER_RSN_EXT 0x60 /* Trig Reason Extension */ #define PCI_EXP_DPC_SOURCE_ID 10 /* DPC Source Identifier */