2 * Copyright (C) 2003-2004 Intel
3 * Copyright (C) Tom Long Nguyen (tom.l.nguyen@intel.com)
12 * Assume the maximum number of hot plug slots supported by the system is about
13 * ten. The worstcase is that each of these slots is hot-added with a device,
14 * which has two MSI/MSI-X capable functions. To avoid any MSI-X driver, which
15 * attempts to request all available vectors, NR_HP_RESERVED_VECTORS is defined
16 * as below to ensure at least one message is assigned to each detected MSI/
17 * MSI-X device function.
19 #define NR_HP_RESERVED_VECTORS 20
21 extern int vector_irq[NR_VECTORS];
22 extern void (*interrupt[NR_IRQS])(void);
23 extern int pci_vector_resources(int last, int nr_released);
26 * MSI-X Address Register
28 #define PCI_MSIX_FLAGS_QSIZE 0x7FF
29 #define PCI_MSIX_FLAGS_ENABLE (1 << 15)
30 #define PCI_MSIX_FLAGS_BIRMASK (7 << 0)
31 #define PCI_MSIX_FLAGS_BITMASK (1 << 0)
33 #define PCI_MSIX_ENTRY_SIZE 16
34 #define PCI_MSIX_ENTRY_LOWER_ADDR_OFFSET 0
35 #define PCI_MSIX_ENTRY_UPPER_ADDR_OFFSET 4
36 #define PCI_MSIX_ENTRY_DATA_OFFSET 8
37 #define PCI_MSIX_ENTRY_VECTOR_CTRL_OFFSET 12
39 #define msi_control_reg(base) (base + PCI_MSI_FLAGS)
40 #define msi_lower_address_reg(base) (base + PCI_MSI_ADDRESS_LO)
41 #define msi_upper_address_reg(base) (base + PCI_MSI_ADDRESS_HI)
42 #define msi_data_reg(base, is64bit) \
43 ( (is64bit == 1) ? base+PCI_MSI_DATA_64 : base+PCI_MSI_DATA_32 )
44 #define msi_mask_bits_reg(base, is64bit) \
45 ( (is64bit == 1) ? base+PCI_MSI_MASK_BIT : base+PCI_MSI_MASK_BIT-4)
46 #define msi_disable(control) control &= ~PCI_MSI_FLAGS_ENABLE
47 #define multi_msi_capable(control) \
48 (1 << ((control & PCI_MSI_FLAGS_QMASK) >> 1))
49 #define multi_msi_enable(control, num) \
50 control |= (((num >> 1) << 4) & PCI_MSI_FLAGS_QSIZE);
51 #define is_64bit_address(control) (control & PCI_MSI_FLAGS_64BIT)
52 #define is_mask_bit_support(control) (control & PCI_MSI_FLAGS_MASKBIT)
53 #define msi_enable(control, num) multi_msi_enable(control, num); \
54 control |= PCI_MSI_FLAGS_ENABLE
56 #define msix_table_offset_reg(base) (base + 0x04)
57 #define msix_pba_offset_reg(base) (base + 0x08)
58 #define msix_enable(control) control |= PCI_MSIX_FLAGS_ENABLE
59 #define msix_disable(control) control &= ~PCI_MSIX_FLAGS_ENABLE
60 #define msix_table_size(control) ((control & PCI_MSIX_FLAGS_QSIZE)+1)
61 #define multi_msix_capable msix_table_size
62 #define msix_unmask(address) (address & ~PCI_MSIX_FLAGS_BITMASK)
63 #define msix_mask(address) (address | PCI_MSIX_FLAGS_BITMASK)
64 #define msix_is_pending(address) (address & PCI_MSIX_FLAGS_PENDMASK)
67 * MSI Defined Data Structures
69 #define MSI_ADDRESS_HEADER 0xfee
70 #define MSI_ADDRESS_HEADER_SHIFT 12
71 #define MSI_ADDRESS_HEADER_MASK 0xfff000
72 #define MSI_ADDRESS_DEST_ID_MASK 0xfff0000f
73 #define MSI_TARGET_CPU_MASK 0xff
74 #define MSI_DELIVERY_MODE 0
75 #define MSI_LEVEL_MODE 1 /* Edge always assert */
76 #define MSI_TRIGGER_MODE 0 /* MSI is edge sensitive */
77 #define MSI_PHYSICAL_MODE 0
78 #define MSI_LOGICAL_MODE 1
79 #define MSI_REDIRECTION_HINT_MODE 0
82 #if defined(__LITTLE_ENDIAN_BITFIELD)
84 __u32 delivery_mode : 3; /* 000b: FIXED | 001b: lowest prior */
86 __u32 level : 1; /* 0: deassert | 1: assert */
87 __u32 trigger : 1; /* 0: edge | 1: level */
88 __u32 reserved_2 : 16;
89 #elif defined(__BIG_ENDIAN_BITFIELD)
90 __u32 reserved_2 : 16;
91 __u32 trigger : 1; /* 0: edge | 1: level */
92 __u32 level : 1; /* 0: deassert | 1: assert */
94 __u32 delivery_mode : 3; /* 000b: FIXED | 001b: lowest prior */
97 #error "Bitfield endianness not defined! Check your byteorder.h"
99 } __attribute__ ((packed));
104 #if defined(__LITTLE_ENDIAN_BITFIELD)
105 __u32 reserved_1 : 2;
106 __u32 dest_mode : 1; /*0:physic | 1:logic */
107 __u32 redirection_hint: 1; /*0: dedicated CPU
108 1: lowest priority */
109 __u32 reserved_2 : 4;
110 __u32 dest_id : 24; /* Destination ID */
111 #elif defined(__BIG_ENDIAN_BITFIELD)
112 __u32 dest_id : 24; /* Destination ID */
113 __u32 reserved_2 : 4;
114 __u32 redirection_hint: 1; /*0: dedicated CPU
115 1: lowest priority */
116 __u32 dest_mode : 1; /*0:physic | 1:logic */
117 __u32 reserved_1 : 2;
119 #error "Bitfield endianness not defined! Check your byteorder.h"
125 } __attribute__ ((packed));
129 __u8 type : 5; /* {0: unused, 5h:MSI, 11h:MSI-X} */
130 __u8 maskbit : 1; /* mask-pending bit supported ? */
131 __u8 state : 1; /* {0: free, 1: busy} */
132 __u8 reserved: 1; /* reserved */
133 __u8 entry_nr; /* specific enabled entry */
134 __u8 default_vector; /* default pre-assigned vector */
135 __u8 current_cpu; /* current destination cpu */
143 void __iomem *mask_base;