mirror of
https://github.com/torvalds/linux.git
synced 2024-11-08 21:21:47 +00:00
174 lines
6.0 KiB
C
174 lines
6.0 KiB
C
#ifndef __SPARC_PCI_H
|
|
#define __SPARC_PCI_H
|
|
|
|
#ifdef __KERNEL__
|
|
|
|
/* Can be used to override the logic in pci_scan_bus for skipping
|
|
* already-configured bus numbers - to be used for buggy BIOSes
|
|
* or architectures with incomplete PCI setup by the loader.
|
|
*/
|
|
#define pcibios_assign_all_busses() 0
|
|
#define pcibios_scan_all_fns(a, b) 0
|
|
|
|
#define PCIBIOS_MIN_IO 0UL
|
|
#define PCIBIOS_MIN_MEM 0UL
|
|
|
|
#define PCI_IRQ_NONE 0xffffffff
|
|
|
|
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, int active)
|
|
{
|
|
/* We don't do dynamic PCI IRQ allocation */
|
|
}
|
|
|
|
/* Dynamic DMA mapping stuff.
|
|
*/
|
|
#define PCI_DMA_BUS_IS_PHYS (0)
|
|
|
|
#include <asm/scatterlist.h>
|
|
|
|
struct pci_dev;
|
|
|
|
/* Allocate and map kernel buffer using consistent mode DMA for a device.
|
|
* hwdev should be valid struct pci_dev pointer for PCI devices.
|
|
*/
|
|
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 assosciated 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_for_cpu is performed.
|
|
*/
|
|
extern dma_addr_t pci_map_single(struct pci_dev *hwdev, void *ptr, size_t size, int direction);
|
|
|
|
/* Unmap a single streaming mode DMA translation. The dma_addr and size
|
|
* must match what was provided for in a previous pci_map_single call. All
|
|
* other usages are undefined.
|
|
*
|
|
* After this call, reads by the cpu to the buffer are guaranteed to see
|
|
* whatever the device wrote there.
|
|
*/
|
|
extern void pci_unmap_single(struct pci_dev *hwdev, dma_addr_t dma_addr, size_t size, int direction);
|
|
|
|
/* pci_unmap_{single,page} is not a nop, thus... */
|
|
#define DECLARE_PCI_UNMAP_ADDR(ADDR_NAME) \
|
|
dma_addr_t ADDR_NAME;
|
|
#define DECLARE_PCI_UNMAP_LEN(LEN_NAME) \
|
|
__u32 LEN_NAME;
|
|
#define pci_unmap_addr(PTR, ADDR_NAME) \
|
|
((PTR)->ADDR_NAME)
|
|
#define pci_unmap_addr_set(PTR, ADDR_NAME, VAL) \
|
|
(((PTR)->ADDR_NAME) = (VAL))
|
|
#define pci_unmap_len(PTR, LEN_NAME) \
|
|
((PTR)->LEN_NAME)
|
|
#define pci_unmap_len_set(PTR, LEN_NAME, VAL) \
|
|
(((PTR)->LEN_NAME) = (VAL))
|
|
|
|
/*
|
|
* Same as above, only with pages instead of mapped addresses.
|
|
*/
|
|
extern dma_addr_t pci_map_page(struct pci_dev *hwdev, struct page *page,
|
|
unsigned long offset, size_t size, int direction);
|
|
extern void pci_unmap_page(struct pci_dev *hwdev,
|
|
dma_addr_t dma_address, size_t size, int direction);
|
|
|
|
/* 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.
|
|
*/
|
|
extern int pci_map_sg(struct pci_dev *hwdev, struct scatterlist *sg, int nents, int direction);
|
|
|
|
/* Unmap a set of streaming mode DMA translations.
|
|
* Again, cpu read rules concerning calls here are the same as for
|
|
* pci_unmap_single() above.
|
|
*/
|
|
extern void pci_unmap_sg(struct pci_dev *hwdev, struct scatterlist *sg, int nhwents, int direction);
|
|
|
|
/* 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, you
|
|
* must first perform a pci_dma_sync_for_device, and then the device
|
|
* again owns the buffer.
|
|
*/
|
|
extern void pci_dma_sync_single_for_cpu(struct pci_dev *hwdev, dma_addr_t dma_handle, size_t size, int direction);
|
|
extern void pci_dma_sync_single_for_device(struct pci_dev *hwdev, dma_addr_t dma_handle, size_t size, int direction);
|
|
|
|
/* 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.
|
|
*/
|
|
extern void pci_dma_sync_sg_for_cpu(struct pci_dev *hwdev, struct scatterlist *sg, int nelems, int direction);
|
|
extern void pci_dma_sync_sg_for_device(struct pci_dev *hwdev, struct scatterlist *sg, int nelems, int direction);
|
|
|
|
/* 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.
|
|
*/
|
|
extern inline int pci_dma_supported(struct pci_dev *hwdev, u64 mask)
|
|
{
|
|
return 1;
|
|
}
|
|
|
|
#define pci_dac_dma_supported(dev, mask) (0)
|
|
|
|
#ifdef CONFIG_PCI
|
|
static inline void pci_dma_burst_advice(struct pci_dev *pdev,
|
|
enum pci_dma_burst_strategy *strat,
|
|
unsigned long *strategy_parameter)
|
|
{
|
|
*strat = PCI_DMA_BURST_INFINITY;
|
|
*strategy_parameter = ~0UL;
|
|
}
|
|
#endif
|
|
|
|
static inline void pcibios_add_platform_entries(struct pci_dev *dev)
|
|
{
|
|
}
|
|
|
|
#define PCI_DMA_ERROR_CODE (~(dma_addr_t)0x0)
|
|
|
|
static inline int pci_dma_mapping_error(dma_addr_t dma_addr)
|
|
{
|
|
return (dma_addr == PCI_DMA_ERROR_CODE);
|
|
}
|
|
|
|
#endif /* __KERNEL__ */
|
|
|
|
/* generic pci stuff */
|
|
#include <asm-generic/pci.h>
|
|
|
|
#endif /* __SPARC_PCI_H */
|