include/asm/msi.h

0001 /* SPDX-License-Identifier: GPL-2.0 */
0002 #ifndef _ASM_X86_MSI_H
0003 #define _ASM_X86_MSI_H
0004 #include <asm/hw_irq.h>
0005 #include <asm/irqdomain.h>
0006
0007 typedef struct irq_alloc_info msi_alloc_info_t;
0008
0009 int pci_msi_prepare(struct irq_domain *domain, struct device *dev, int nvec,
0010             msi_alloc_info_t *arg);
0011
0012 /* Structs and defines for the X86 specific MSI message format */
0013
0014 typedef struct x86_msi_data {
0015     union {
0016         struct {
0017             u32 vector          :  8,
0018                 delivery_mode       :  3,
0019                 dest_mode_logical   :  1,
0020                 reserved        :  2,
0021                 active_low      :  1,
0022                 is_level        :  1;
0023         };
0024         u32 dmar_subhandle;
0025     };
0026 } __attribute__ ((packed)) arch_msi_msg_data_t;
0027 #define arch_msi_msg_data   x86_msi_data
0028
0029 typedef struct x86_msi_addr_lo {
0030     union {
0031         struct {
0032             u32 reserved_0      :  2,
0033                 dest_mode_logical   :  1,
0034                 redirect_hint       :  1,
0035                 reserved_1      :  1,
0036                 virt_destid_8_14    :  7,
0037                 destid_0_7      :  8,
0038                 base_address        : 12;
0039         };
0040         struct {
0041             u32 dmar_reserved_0     :  2,
0042                 dmar_index_15       :  1,
0043                 dmar_subhandle_valid    :  1,
0044                 dmar_format     :  1,
0045                 dmar_index_0_14     : 15,
0046                 dmar_base_address   : 12;
0047         };
0048     };
0049 } __attribute__ ((packed)) arch_msi_msg_addr_lo_t;
0050 #define arch_msi_msg_addr_lo    x86_msi_addr_lo
0051
0052 #define X86_MSI_BASE_ADDRESS_LOW    (0xfee00000 >> 20)
0053
0054 typedef struct x86_msi_addr_hi {
0055     u32 reserved        :  8,
0056         destid_8_31     : 24;
0057 } __attribute__ ((packed)) arch_msi_msg_addr_hi_t;
0058 #define arch_msi_msg_addr_hi    x86_msi_addr_hi
0059
0060 #define X86_MSI_BASE_ADDRESS_HIGH   (0)
0061
0062 struct msi_msg;
0063 u32 x86_msi_msg_get_destid(struct msi_msg *msg, bool extid);
0064
0065 #endif /* _ASM_X86_MSI_H */