msi.h

来自「linux 内核源代码」· C头文件 代码 · 共 43 行

/*
 * Copyright (C) 2003-2004 Intel
 * Copyright (C) Tom Long Nguyen ([e-mail])
 */

#ifndef MSI_H
#define MSI_H

#define PCI_MSIX_ENTRY_SIZE			16
#define  PCI_MSIX_ENTRY_LOWER_ADDR_OFFSET	0
#define  PCI_MSIX_ENTRY_UPPER_ADDR_OFFSET	4
#define  PCI_MSIX_ENTRY_DATA_OFFSET		8
#define  PCI_MSIX_ENTRY_VECTOR_CTRL_OFFSET	12

#define msi_control_reg(base)		(base + PCI_MSI_FLAGS)
#define msi_lower_address_reg(base)	(base + PCI_MSI_ADDRESS_LO)
#define msi_upper_address_reg(base)	(base + PCI_MSI_ADDRESS_HI)
#define msi_data_reg(base, is64bit)	\
	( (is64bit == 1) ? base+PCI_MSI_DATA_64 : base+PCI_MSI_DATA_32 )
#define msi_mask_bits_reg(base, is64bit) \
	( (is64bit == 1) ? base+PCI_MSI_MASK_BIT : base+PCI_MSI_MASK_BIT-4)
#define msi_disable(control)		control &= ~PCI_MSI_FLAGS_ENABLE
#define multi_msi_capable(control) \
	(1 << ((control & PCI_MSI_FLAGS_QMASK) >> 1))
#define multi_msi_enable(control, num) \
	control |= (((num >> 1) << 4) & PCI_MSI_FLAGS_QSIZE);
#define is_64bit_address(control)	(!!(control & PCI_MSI_FLAGS_64BIT))
#define is_mask_bit_support(control)	(!!(control & PCI_MSI_FLAGS_MASKBIT))
#define msi_enable(control, num) multi_msi_enable(control, num); \
	control |= PCI_MSI_FLAGS_ENABLE

#define msix_table_offset_reg(base)	(base + 0x04)
#define msix_pba_offset_reg(base)	(base + 0x08)
#define msix_enable(control)	 	control |= PCI_MSIX_FLAGS_ENABLE
#define msix_disable(control)	 	control &= ~PCI_MSIX_FLAGS_ENABLE
#define msix_table_size(control) 	((control & PCI_MSIX_FLAGS_QSIZE)+1)
#define multi_msix_capable		msix_table_size
#define msix_unmask(address)	 	(address & ~PCI_MSIX_FLAGS_BITMASK)
#define msix_mask(address)		(address | PCI_MSIX_FLAGS_BITMASK)
#define msix_is_pending(address) 	(address & PCI_MSIX_FLAGS_PENDMASK)

#endif /* MSI_H */