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      1 /*
      2  *	pci.h
      3  *
      4  *	PCI defines and function prototypes
      5  *	Copyright 1994, Drew Eckhardt
      6  *	Copyright 1997--1999 Martin Mares <mj (at) ucw.cz>
      7  *
      8  *	For more information, please consult the following manuals (look at
      9  *	http://www.pcisig.com/ for how to get them):
     10  *
     11  *	PCI BIOS Specification
     12  *	PCI Local Bus Specification
     13  *	PCI to PCI Bridge Specification
     14  *	PCI System Design Guide
     15  */
     16 
     17 #ifndef LINUX_PCI_H
     18 #define LINUX_PCI_H
     19 
     20 /* Include the pci register defines */
     21 #include <linux/pci_regs.h>
     22 
     23 /*
     24  * The PCI interface treats multi-function devices as independent
     25  * devices.  The slot/function address of each device is encoded
     26  * in a single byte as follows:
     27  *
     28  *	7:3 = slot
     29  *	2:0 = function
     30  */
     31 #define PCI_DEVFN(slot,func)	((((slot) & 0x1f) << 3) | ((func) & 0x07))
     32 #define PCI_SLOT(devfn)		(((devfn) >> 3) & 0x1f)
     33 #define PCI_FUNC(devfn)		((devfn) & 0x07)
     34 
     35 /* Ioctls for /proc/bus/pci/X/Y nodes. */
     36 #define PCIIOC_BASE		('P' << 24 | 'C' << 16 | 'I' << 8)
     37 #define PCIIOC_CONTROLLER	(PCIIOC_BASE | 0x00)	/* Get controller for PCI device. */
     38 #define PCIIOC_MMAP_IS_IO	(PCIIOC_BASE | 0x01)	/* Set mmap state to I/O space. */
     39 #define PCIIOC_MMAP_IS_MEM	(PCIIOC_BASE | 0x02)	/* Set mmap state to MEM space. */
     40 #define PCIIOC_WRITE_COMBINE	(PCIIOC_BASE | 0x03)	/* Enable/disable write-combining. */
     41 
     42 #endif /* LINUX_PCI_H */
     43