/* SPDX-License-Identifier: GPL-2.0 */
#ifndef _ASM_X86_MSI_H
#define _ASM_X86_MSI_H
#include <asm/hw_irq.h>
#include <asm/irqdomain.h>

typedef struct irq_alloc_info msi_alloc_info_t;

int pci_msi_prepare(struct irq_domain *domain, struct device *dev, int nvec,
                    msi_alloc_info_t *arg);

/* Structs and defines for the X86 specific MSI message format */

typedef struct x86_msi_data {
        union {
                struct {
                        u32     vector                  :  8,
                                delivery_mode           :  3,
                                dest_mode_logical       :  1,
                                reserved                :  2,
                                active_low              :  1,
                                is_level                :  1;
                };
                u32     dmar_subhandle;
        };
} __attribute__ ((packed)) arch_msi_msg_data_t;
#define arch_msi_msg_data       x86_msi_data

typedef struct x86_msi_addr_lo {
        union {
                struct {
                        u32     reserved_0              :  2,
                                dest_mode_logical       :  1,
                                redirect_hint           :  1,
                                reserved_1              :  1,
                                virt_destid_8_14        :  7,
                                destid_0_7              :  8,
                                base_address            : 12;
                };
                struct {
                        u32     dmar_reserved_0         :  2,
                                dmar_index_15           :  1,
                                dmar_subhandle_valid    :  1,
                                dmar_format             :  1,
                                dmar_index_0_14         : 15,
                                dmar_base_address       : 12;
                };
        };
} __attribute__ ((packed)) arch_msi_msg_addr_lo_t;
#define arch_msi_msg_addr_lo    x86_msi_addr_lo

#define X86_MSI_BASE_ADDRESS_LOW        (0xfee00000 >> 20)

typedef struct x86_msi_addr_hi {
        u32     reserved                :  8,
                destid_8_31             : 24;
} __attribute__ ((packed)) arch_msi_msg_addr_hi_t;
#define arch_msi_msg_addr_hi    x86_msi_addr_hi

#define X86_MSI_BASE_ADDRESS_HIGH       (0)

struct msi_msg;
u32 x86_msi_msg_get_destid(struct msi_msg *msg, bool extid);

#define X86_VECTOR_MSI_FLAGS_SUPPORTED                                  \
        (MSI_GENERIC_FLAGS_MASK | MSI_FLAG_PCI_MSIX | MSI_FLAG_PCI_MSIX_ALLOC_DYN)

#define X86_VECTOR_MSI_FLAGS_REQUIRED                                   \
        (MSI_FLAG_USE_DEF_DOM_OPS | MSI_FLAG_USE_DEF_CHIP_OPS)

#endif /* _ASM_X86_MSI_H */