/* * BK Id: SCCS/s.pci.h 1.16 10/15/01 22:51:33 paulus */#ifndef __PPC_PCI_H#define __PPC_PCI_H#ifdef __KERNEL__/* Values for the `which' argument to sys_pciconfig_iobase syscall.  */#define IOBASE_BRIDGE_NUMBER	0#define IOBASE_MEMORY		1#define IOBASE_IO		2#define IOBASE_ISA_IO		3#define IOBASE_ISA_MEM		4extern int pcibios_assign_all_busses(void);#define PCIBIOS_MIN_IO		0x1000#define PCIBIOS_MIN_MEM		0x10000000extern inline void pcibios_set_master(struct pci_dev *dev){	/* No special bus mastering setup handling */}extern inline void pcibios_penalize_isa_irq(int irq){	/* We don't do dynamic PCI IRQ allocation */}extern unsigned long pci_resource_to_bus(struct pci_dev *pdev, struct resource *res);/* * The PCI bus bridge can translate addresses issued by the processor(s) * into a different address on the PCI bus.  On 32-bit cpus, we assume * this mapping is 1-1, but on 64-bit systems it often isn't. *  * Obsolete ! Drivers should now use pci_resource_to_bus */extern unsigned long phys_to_bus(unsigned long pa);extern unsigned long pci_phys_to_bus(unsigned long pa, int busnr);extern unsigned long pci_bus_to_phys(unsigned int ba, int busnr);    /* Dynamic DMA Mapping stuff, stolen from i386 * 	++ajoshi */#include <linux/types.h>#include <linux/slab.h>#include <linux/string.h>#include <asm/scatterlist.h>#include <asm/io.h>struct pci_dev;/* The PCI address space does equal the physical memory * address space.  The networking and block device layers use * this boolean for bounce buffer decisions. */#define PCI_DMA_BUS_IS_PHYS	(1)	/* Allocate and map kernel buffer using consistent mode DMA for a device. * hwdev should be valid struct pci_dev pointer for PCI devices, * NULL for PCI-like buses (ISA, EISA). * Returns non-NULL cpu-view pointer to the buffer if successful and * sets *dma_addrp to the pci side dma address as well, else *dma_addrp * is undefined. */extern void *pci_alloc_consistent(struct pci_dev *hwdev, size_t size,				  dma_addr_t *dma_handle);/* Free and unmap a consistent DMA buffer. * cpu_addr is what was returned from pci_alloc_consistent, * size must be the same as what as passed into pci_alloc_consistent, * and likewise dma_addr must be the same as what *dma_addrp was set to. * * References to the memory and mappings associated with cpu_addr/dma_addr * past this call are illegal. */extern void pci_free_consistent(struct pci_dev *hwdev, size_t size,				void *vaddr, dma_addr_t dma_handle);/* Map a single buffer of the indicated size for DMA in streaming mode. * The 32-bit bus address to use is returned. * * Once the device is given the dma address, the device owns this memory * until either pci_unmap_single or pci_dma_sync_single is performed. */static inline dma_addr_t pci_map_single(struct pci_dev *hwdev, void *ptr,					size_t size, int direction){	if (direction == PCI_DMA_NONE)		BUG();	return virt_to_bus(ptr);}static inline void pci_unmap_single(struct pci_dev *hwdev, dma_addr_t dma_addr,				    size_t size, int direction){	if (direction == PCI_DMA_NONE)		BUG();	/* nothing to do */}/* pci_unmap_{page,single} is a nop so... */#define DECLARE_PCI_UNMAP_ADDR(ADDR_NAME)#define DECLARE_PCI_UNMAP_LEN(LEN_NAME)#define pci_unmap_addr(PTR, ADDR_NAME)		(0)#define pci_unmap_addr_set(PTR, ADDR_NAME, VAL)	do { } while (0)#define pci_unmap_len(PTR, LEN_NAME)		(0)#define pci_unmap_len_set(PTR, LEN_NAME, VAL)	do { } while (0)/* * pci_{map,unmap}_single_page maps a kernel page to a dma_addr_t. identical * to pci_map_single, but takes a struct page instead of a virtual address */static inline dma_addr_t pci_map_page(struct pci_dev *hwdev, struct page *page,				      unsigned long offset, size_t size, int direction){	if (direction == PCI_DMA_NONE)		BUG();	return (page - mem_map) * PAGE_SIZE + PCI_DRAM_OFFSET + offset;}static inline void pci_unmap_page(struct pci_dev *hwdev, dma_addr_t dma_address,				  size_t size, int direction){	if (direction == PCI_DMA_NONE)		BUG();	/* Nothing to do */}/* Map a set of buffers described by scatterlist in streaming * mode for DMA.  This is the scather-gather version of the * above pci_map_single interface.  Here the scatter gather list * elements are each tagged with the appropriate dma address * and length.  They are obtained via sg_dma_{address,length}(SG). * * NOTE: An implementation may be able to use a smaller number of *       DMA address/length pairs than there are SG table elements. *       (for example via virtual mapping capabilities) *       The routine returns the number of addr/length pairs actually *       used, at most nents. * * Device ownership issues as mentioned above for pci_map_single are * the same here. */static inline int pci_map_sg(struct pci_dev *hwdev, struct scatterlist *sg,			     int nents, int direction){	int i;	if (direction == PCI_DMA_NONE)		BUG();	/*	 * temporary 2.4 hack	 */	for (i = 0; i < nents; i++) {		if (sg[i].address && sg[i].page)			BUG();		else if (!sg[i].address && !sg[i].page)			BUG();		if (sg[i].address)			sg[i].dma_address = virt_to_bus(sg[i].address);		else			sg[i].dma_address = page_to_bus(sg[i].page) + sg[i].offset;	}	return nents;}/* Unmap a set of streaming mode DMA translations. * Again, cpu read rules concerning calls here are the same as for * pci_unmap_single() above. */static inline void pci_unmap_sg(struct pci_dev *hwdev, struct scatterlist *sg,				int nents, int direction){	if (direction == PCI_DMA_NONE)		BUG();	/* nothing to do */}/* Make physical memory consistent for a single * streaming mode DMA translation after a transfer. * * If you perform a pci_map_single() but wish to interrogate the * buffer using the cpu, yet do not wish to teardown the PCI dma * mapping, you must call this function before doing so.  At the * next point you give the PCI dma address back to the card, the * device again owns the buffer. */static inline void pci_dma_sync_single(struct pci_dev *hwdev,				       dma_addr_t dma_handle,				       size_t size, int direction){	if (direction == PCI_DMA_NONE)		BUG();	/* nothing to do */}/* Make physical memory consistent for a set of streaming * mode DMA translations after a transfer. * * The same as pci_dma_sync_single but for a scatter-gather list, * same rules and usage. */static inline void pci_dma_sync_sg(struct pci_dev *hwdev,				   struct scatterlist *sg,				   int nelems, int direction){	if (direction == PCI_DMA_NONE)		BUG();	/* nothing to do */}/* Return whether the given PCI device DMA address mask can * be supported properly.  For example, if your device can * only drive the low 24-bits during PCI bus mastering, then * you would pass 0x00ffffff as the mask to this function. */static inline int pci_dma_supported(struct pci_dev *hwdev, u64 mask){	return 1;}/* * At present there are very few 32-bit PPC machines that can have * memory above the 4GB point, and we don't support that. */#define pci_dac_dma_supported(pci_dev, mask)	(0)static __inline__ dma64_addr_tpci_dac_page_to_dma(struct pci_dev *pdev, struct page *page, unsigned long offset, int direction){	return (dma64_addr_t) page_to_bus(page) + offset;}static __inline__ struct page *pci_dac_dma_to_page(struct pci_dev *pdev, dma64_addr_t dma_addr){	return mem_map + (unsigned long)(dma_addr >> PAGE_SHIFT);}static __inline__ unsigned longpci_dac_dma_to_offset(struct pci_dev *pdev, dma64_addr_t dma_addr){	return (dma_addr & ~PAGE_MASK);}static __inline__ voidpci_dac_dma_sync_single(struct pci_dev *pdev, dma64_addr_t dma_addr, size_t len, int direction){	/* Nothing to do. */}/* These macros should be used after a pci_map_sg call has been done * to get bus addresses of each of the SG entries and their lengths. * You should only work with the number of sg entries pci_map_sg * returns. */#define sg_dma_address(sg)	((sg)->dma_address)#define sg_dma_len(sg)		((sg)->length)/* Return the index of the PCI controller for device PDEV. */extern int pci_controller_num(struct pci_dev *pdev);/* Map a range of PCI memory or I/O space for a device into user space */int pci_mmap_page_range(struct pci_dev *pdev, struct vm_area_struct *vma,			enum pci_mmap_state mmap_state, int write_combine);/* Tell drivers/pci/proc.c that we have pci_mmap_page_range() */#define HAVE_PCI_MMAP	1#endif	/* __KERNEL__ */#endif /* __PPC_PCI_H */