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/*
* 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 4
extern int pcibios_assign_all_busses(void);
#define PCIBIOS_MIN_IO 0x1000
#define PCIBIOS_MIN_MEM 0x10000000
extern 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_t
pci_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 long
pci_dac_dma_to_offset(struct pci_dev *pdev, dma64_addr_t dma_addr)
{
return (dma_addr & ~PAGE_MASK);
}
static __inline__ void
pci_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 */
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