drivers/pci/msi.h

   1 /*
   2  * Copyright (C) 2003-2004 Intel
   3  * Copyright (C) Tom Long Nguyen (tom.l.nguyen@intel.com)
   4  */
   5
   6 #ifndef MSI_H
   7 #define MSI_H
   8
   9 /*
  10  * MSI-X Address Register
  11  */
  12 #define PCI_MSIX_FLAGS_QSIZE            0x7FF
  13 #define PCI_MSIX_FLAGS_ENABLE           (1 << 15)
  14 #define PCI_MSIX_FLAGS_BIRMASK          (7 << 0)
  15 #define PCI_MSIX_FLAGS_BITMASK          (1 << 0)
  16
  17 #define PCI_MSIX_ENTRY_SIZE                     16
  18 #define  PCI_MSIX_ENTRY_LOWER_ADDR_OFFSET       0
  19 #define  PCI_MSIX_ENTRY_UPPER_ADDR_OFFSET       4
  20 #define  PCI_MSIX_ENTRY_DATA_OFFSET             8
  21 #define  PCI_MSIX_ENTRY_VECTOR_CTRL_OFFSET      12
  22
  23 #define msi_control_reg(base)           (base + PCI_MSI_FLAGS)
  24 #define msi_lower_address_reg(base)     (base + PCI_MSI_ADDRESS_LO)
  25 #define msi_upper_address_reg(base)     (base + PCI_MSI_ADDRESS_HI)
  26 #define msi_data_reg(base, is64bit)     \
  27         ( (is64bit == 1) ? base+PCI_MSI_DATA_64 : base+PCI_MSI_DATA_32 )
  28 #define msi_mask_bits_reg(base, is64bit) \
  29         ( (is64bit == 1) ? base+PCI_MSI_MASK_BIT : base+PCI_MSI_MASK_BIT-4)
  30 #define msi_disable(control)            control &= ~PCI_MSI_FLAGS_ENABLE
  31 #define multi_msi_capable(control) \
  32         (1 << ((control & PCI_MSI_FLAGS_QMASK) >> 1))
  33 #define multi_msi_enable(control, num) \
  34         control |= (((num >> 1) << 4) & PCI_MSI_FLAGS_QSIZE);
  35 #define is_64bit_address(control)       (!!(control & PCI_MSI_FLAGS_64BIT))
  36 #define is_mask_bit_support(control)    (!!(control & PCI_MSI_FLAGS_MASKBIT))
  37 #define msi_enable(control, num) multi_msi_enable(control, num); \
  38         control |= PCI_MSI_FLAGS_ENABLE
  39
  40 #define msix_table_offset_reg(base)     (base + 0x04)
  41 #define msix_pba_offset_reg(base)       (base + 0x08)
  42 #define msix_enable(control)            control |= PCI_MSIX_FLAGS_ENABLE
  43 #define msix_disable(control)           control &= ~PCI_MSIX_FLAGS_ENABLE
  44 #define msix_table_size(control)        ((control & PCI_MSIX_FLAGS_QSIZE)+1)
  45 #define multi_msix_capable              msix_table_size
  46 #define msix_unmask(address)            (address & ~PCI_MSIX_FLAGS_BITMASK)
  47 #define msix_mask(address)              (address | PCI_MSIX_FLAGS_BITMASK)
  48 #define msix_is_pending(address)        (address & PCI_MSIX_FLAGS_PENDMASK)
  49
  50 #endif /* MSI_H */