xref: /linux-6.15/include/linux/aer.h (revision 7e077e67)

/* SPDX-License-Identifier: GPL-2.0 */
/*
 * Copyright (C) 2006 Intel Corp.
 *     Tom Long Nguyen ([email protected])
 *     Zhang Yanmin ([email protected])
 */

#ifndef _AER_H_
#define _AER_H_

#include <linux/errno.h>
#include <linux/types.h>

#define AER_NONFATAL			0
#define AER_FATAL			1
#define AER_CORRECTABLE			2
#define DPC_FATAL			3

/*
 * AER and DPC capabilities TLP Logging register sizes (PCIe r6.2, sec 7.8.4
 * & 7.9.14).
 */
#define PCIE_STD_NUM_TLP_HEADERLOG     4
#define PCIE_STD_MAX_TLP_PREFIXLOG     4
#define PCIE_STD_MAX_TLP_HEADERLOG	(PCIE_STD_NUM_TLP_HEADERLOG + 10)

struct pci_dev;

struct pcie_tlp_log {
	union {
		u32 dw[PCIE_STD_MAX_TLP_HEADERLOG];
		struct {
			u32 _do_not_use[PCIE_STD_NUM_TLP_HEADERLOG];
			u32 prefix[PCIE_STD_MAX_TLP_PREFIXLOG];
		};
	};
	u8 header_len;		/* Length of the Logged TLP Header in DWORDs */
	bool flit;		/* TLP was logged when in Flit mode */
};

struct aer_capability_regs {
	u32 header;
	u32 uncor_status;
	u32 uncor_mask;
	u32 uncor_severity;
	u32 cor_status;
	u32 cor_mask;
	u32 cap_control;
	struct pcie_tlp_log header_log;
	u32 root_command;
	u32 root_status;
	u16 cor_err_source;
	u16 uncor_err_source;
};

#if defined(CONFIG_PCIEAER)
int pci_aer_clear_nonfatal_status(struct pci_dev *dev);
int pcie_aer_is_native(struct pci_dev *dev);
#else
static inline int pci_aer_clear_nonfatal_status(struct pci_dev *dev)
{
	return -EINVAL;
}
static inline int pcie_aer_is_native(struct pci_dev *dev) { return 0; }
#endif

void pci_print_aer(struct pci_dev *dev, int aer_severity,
		    struct aer_capability_regs *aer);
int cper_severity_to_aer(int cper_severity);
void aer_recover_queue(int domain, unsigned int bus, unsigned int devfn,
		       int severity, struct aer_capability_regs *aer_regs);
#endif //_AER_H_