Commit 01060e3d authored by Bjorn Helgaas's avatar Bjorn Helgaas Committed by Bjorn Helgaas
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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: default avatarBjorn Helgaas <bhelgaas@google.com>
Reviewed-by: default avatarKeith Busch <keith.busch@intel.com>
Reviewed-by: default avatarSinan Kaya <okaya@codeaurora.org>
parent 716f0f73

drivers/pci/pcie/pcie-dpc.c

+2 −2
Original line number Diff line number Diff line
@@ -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" :

include/uapi/linux/pci_regs.h

+2 −0
Original line number Diff line number Diff line
@@ -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 */