/* SPDX-License-Identifier: GPL-2.0 */
/*
 * Copyright (C) 2006 Intel Corp.
 *     Tom Long Nguyen (tom.l.nguyen@intel.com)
 *     Zhang Yanmin (yanmin.zhang@intel.com)
 */

#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);
void pci_aer_unmask_internal_errors(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; }
static inline void pci_aer_unmask_internal_errors(struct pci_dev *dev) { }
#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_