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 #define set_msi_irq_affinity set_msi_affinity
28 #define set_msi_irq_affinity NULL
32 * MSI-X Address Register
34 #define PCI_MSIX_FLAGS_QSIZE 0x7FF
35 #define PCI_MSIX_FLAGS_ENABLE (1 << 15)
36 #define PCI_MSIX_FLAGS_BIRMASK (7 << 0)
37 #define PCI_MSIX_FLAGS_BITMASK (1 << 0)
39 #define PCI_MSIX_ENTRY_SIZE 16
40 #define PCI_MSIX_ENTRY_LOWER_ADDR_OFFSET 0
41 #define PCI_MSIX_ENTRY_UPPER_ADDR_OFFSET 4
42 #define PCI_MSIX_ENTRY_DATA_OFFSET 8
43 #define PCI_MSIX_ENTRY_VECTOR_CTRL_OFFSET 12
45 #define msi_control_reg(base) (base + PCI_MSI_FLAGS)
46 #define msi_lower_address_reg(base) (base + PCI_MSI_ADDRESS_LO)
47 #define msi_upper_address_reg(base) (base + PCI_MSI_ADDRESS_HI)
48 #define msi_data_reg(base, is64bit) \
49 ( (is64bit == 1) ? base+PCI_MSI_DATA_64 : base+PCI_MSI_DATA_32 )
50 #define msi_mask_bits_reg(base, is64bit) \
51 ( (is64bit == 1) ? base+PCI_MSI_MASK_BIT : base+PCI_MSI_MASK_BIT-4)
52 #define msi_disable(control) control &= ~PCI_MSI_FLAGS_ENABLE
53 #define multi_msi_capable(control) \
54 (1 << ((control & PCI_MSI_FLAGS_QMASK) >> 1))
55 #define multi_msi_enable(control, num) \
56 control |= (((num >> 1) << 4) & PCI_MSI_FLAGS_QSIZE);
57 #define is_64bit_address(control) (control & PCI_MSI_FLAGS_64BIT)
58 #define is_mask_bit_support(control) (control & PCI_MSI_FLAGS_MASKBIT)
59 #define msi_enable(control, num) multi_msi_enable(control, num); \
60 control |= PCI_MSI_FLAGS_ENABLE
62 #define msix_table_offset_reg(base) (base + 0x04)
63 #define msix_pba_offset_reg(base) (base + 0x08)
64 #define msix_enable(control) control |= PCI_MSIX_FLAGS_ENABLE
65 #define msix_disable(control) control &= ~PCI_MSIX_FLAGS_ENABLE
66 #define msix_table_size(control) ((control & PCI_MSIX_FLAGS_QSIZE)+1)
67 #define multi_msix_capable msix_table_size
68 #define msix_unmask(address) (address & ~PCI_MSIX_FLAGS_BITMASK)
69 #define msix_mask(address) (address | PCI_MSIX_FLAGS_BITMASK)
70 #define msix_is_pending(address) (address & PCI_MSIX_FLAGS_PENDMASK)
73 * MSI Defined Data Structures
75 #define MSI_ADDRESS_HEADER 0xfee
76 #define MSI_ADDRESS_HEADER_SHIFT 12
77 #define MSI_ADDRESS_HEADER_MASK 0xfff000
78 #define MSI_ADDRESS_DEST_ID_MASK 0xfff0000f
79 #define MSI_TARGET_CPU_MASK 0xff
80 #define MSI_DELIVERY_MODE 0
81 #define MSI_LEVEL_MODE 1 /* Edge always assert */
82 #define MSI_TRIGGER_MODE 0 /* MSI is edge sensitive */
83 #define MSI_PHYSICAL_MODE 0
84 #define MSI_LOGICAL_MODE 1
85 #define MSI_REDIRECTION_HINT_MODE 0
88 #if defined(__LITTLE_ENDIAN_BITFIELD)
90 __u32 delivery_mode : 3; /* 000b: FIXED | 001b: lowest prior */
92 __u32 level : 1; /* 0: deassert | 1: assert */
93 __u32 trigger : 1; /* 0: edge | 1: level */
94 __u32 reserved_2 : 16;
95 #elif defined(__BIG_ENDIAN_BITFIELD)
96 __u32 reserved_2 : 16;
97 __u32 trigger : 1; /* 0: edge | 1: level */
98 __u32 level : 1; /* 0: deassert | 1: assert */
100 __u32 delivery_mode : 3; /* 000b: FIXED | 001b: lowest prior */
103 #error "Bitfield endianness not defined! Check your byteorder.h"
105 } __attribute__ ((packed));
110 #if defined(__LITTLE_ENDIAN_BITFIELD)
111 __u32 reserved_1 : 2;
112 __u32 dest_mode : 1; /*0:physic | 1:logic */
113 __u32 redirection_hint: 1; /*0: dedicated CPU
114 1: lowest priority */
115 __u32 reserved_2 : 4;
116 __u32 dest_id : 24; /* Destination ID */
117 #elif defined(__BIG_ENDIAN_BITFIELD)
118 __u32 dest_id : 24; /* Destination ID */
119 __u32 reserved_2 : 4;
120 __u32 redirection_hint: 1; /*0: dedicated CPU
121 1: lowest priority */
122 __u32 dest_mode : 1; /*0:physic | 1:logic */
123 __u32 reserved_1 : 2;
125 #error "Bitfield endianness not defined! Check your byteorder.h"
131 } __attribute__ ((packed));
135 __u8 type : 5; /* {0: unused, 5h:MSI, 11h:MSI-X} */
136 __u8 maskbit : 1; /* mask-pending bit supported ? */
137 __u8 state : 1; /* {0: free, 1: busy} */
138 __u8 reserved: 1; /* reserved */
139 __u8 entry_nr; /* specific enabled entry */
140 __u8 default_vector; /* default pre-assigned vector */
141 __u8 current_cpu; /* current destination cpu */
149 void __iomem *mask_base;