include/asm-alpha/pci.h - maze/linux - Git at Google

 #ifndef __ALPHA_PCI_H
 #define __ALPHA_PCI_H

 #ifdef __KERNEL__

 #include <linux/spinlock.h>
 #include <asm/scatterlist.h>
 #include <asm/machvec.h>

 /*
  * The following structure is used to manage multiple PCI busses.
  */

 struct pci_dev;
 struct pci_bus;
 struct resource;
 struct pci_iommu_arena;
 struct page;

 /* A controller.  Used to manage multiple PCI busses.  */

 struct pci_controller {
 	struct pci_controller *next;
         struct pci_bus *bus;
 	struct resource *io_space;
 	struct resource *mem_space;

 	/* The following are for reporting to userland.  The invariant is
 	   that if we report a BWX-capable dense memory, we do not report
 	   a sparse memory at all, even if it exists.  */
 	unsigned long sparse_mem_base;
 	unsigned long dense_mem_base;
 	unsigned long sparse_io_base;
 	unsigned long dense_io_base;

 	/* This one's for the kernel only.  It's in KSEG somewhere.  */
 	unsigned long config_space_base;

 	unsigned int index;
 	/* For compatibility with current (as of July 2003) pciutils
 	   and XFree86. Eventually will be removed. */
 	unsigned int need_domain_info;

 	struct pci_iommu_arena *sg_pci;
 	struct pci_iommu_arena *sg_isa;

 	void *sysdata;
 };

 /* Override the logic in pci_scan_bus for skipping already-configured
    bus numbers.  */

 #define pcibios_assign_all_busses()	1
 #define pcibios_scan_all_fns(a, b)	0

 #define PCIBIOS_MIN_IO		alpha_mv.min_io_address
 #define PCIBIOS_MIN_MEM		alpha_mv.min_mem_address

 extern void pcibios_set_master(struct pci_dev *dev);

 extern inline void pcibios_penalize_isa_irq(int irq)
 {
 	/* We don't do dynamic PCI IRQ allocation */
 }

 /* IOMMU controls.  */

 /* The PCI address space does not 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  0

 /* Allocate and map kernel buffer using consistent mode DMA for PCI
    device.  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 *, size_t, dma_addr_t *);

 /* Free and unmap a consistent DMA buffer.  CPU_ADDR and DMA_ADDR must
    be values that were returned from pci_alloc_consistent.  SIZE must
    be the same as what as passed into pci_alloc_consistent.
    References to the memory and mappings associated with CPU_ADDR or
    DMA_ADDR past this call are illegal.  */

 extern void pci_free_consistent(struct pci_dev *, size_t, void *, dma_addr_t);

 /* Map a single buffer of the indicate size for PCI DMA in streaming mode.
    The 32-bit PCI bus mastering 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 *, void *, size_t, int);

 /* Likewise, but for a page instead of an address.  */
 extern dma_addr_t pci_map_page(struct pci_dev *, struct page *,
 			       unsigned long, size_t, int);

 /* Test for pci_map_single or pci_map_page having generated an error.  */

 static inline int
 pci_dma_mapping_error(dma_addr_t dma_addr)
 {
 	return dma_addr == 0;
 }

 /* 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 *, dma_addr_t, size_t, int);
 extern void pci_unmap_page(struct pci_dev *, dma_addr_t, size_t, int);

 /* 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))

 /* Map a set of buffers described by scatterlist in streaming mode for
    PCI DMA.  This is the scatter-gather version of the above
    pci_map_single interface.  Here the scatter gather list elements
    are each tagged with the appropriate PCI 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 *, struct scatterlist *, int, int);

 /* 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 *, struct scatterlist *, int, int);

 /* Make physical memory consistent for a single streaming mode DMA
    translation after a transfer and device currently has ownership
    of the buffer.

    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.  */

 static inline void
 pci_dma_sync_single_for_cpu(struct pci_dev *dev, dma_addr_t dma_addr,
 			    long size, int direction)
 {
 	/* Nothing to do.  */
 }

 static inline void
 pci_dma_sync_single_for_device(struct pci_dev *dev, dma_addr_t dma_addr,
 			       size_t size, int direction)
 {
 	/* 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_for_cpu(struct pci_dev *dev, struct scatterlist *sg,
 			int nents, int direction)
 {
 	/* Nothing to do.  */
 }

 static inline void
 pci_dma_sync_sg_for_device(struct pci_dev *dev, struct scatterlist *sg,
 			   int nents, int direction)
 {
 	/* 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.  */

 extern int pci_dma_supported(struct pci_dev *hwdev, u64 mask);

 /* True if the machine supports DAC addressing, and DEV can
    make use of it given MASK.  */
 extern int pci_dac_dma_supported(struct pci_dev *hwdev, u64 mask);

 /* Convert to/from DAC dma address and struct page.  */
 extern dma64_addr_t pci_dac_page_to_dma(struct pci_dev *, struct page *,
 					unsigned long, int);
 extern struct page *pci_dac_dma_to_page(struct pci_dev *, dma64_addr_t);
 extern unsigned long pci_dac_dma_to_offset(struct pci_dev *, dma64_addr_t);

 static inline void
 pci_dac_dma_sync_single_for_cpu(struct pci_dev *pdev, dma64_addr_t dma_addr,
 				size_t len, int direction)
 {
 	/* Nothing to do. */
 }

 static inline void
 pci_dac_dma_sync_single_for_device(struct pci_dev *pdev, dma64_addr_t dma_addr,
 				   size_t len, int direction)
 {
 	/* Nothing to do. */
 }

 static inline void pci_dma_burst_advice(struct pci_dev *pdev,
 					enum pci_dma_burst_strategy *strat,
 					unsigned long *strategy_parameter)
 {
 	unsigned long cacheline_size;
 	u8 byte;

 	pci_read_config_byte(pdev, PCI_CACHE_LINE_SIZE, &byte);
 	if (byte == 0)
 		cacheline_size = 1024;
 	else
 		cacheline_size = (int) byte * 4;

 	*strat = PCI_DMA_BURST_BOUNDARY;
 	*strategy_parameter = cacheline_size;
 }

 /* TODO: integrate with include/asm-generic/pci.h ? */
 static inline int pci_get_legacy_ide_irq(struct pci_dev *dev, int channel)
 {
 	return channel ? 15 : 14;
 }

 extern void pcibios_resource_to_bus(struct pci_dev *, struct pci_bus_region *,
 				    struct resource *);

 #define pci_domain_nr(bus) ((struct pci_controller *)(bus)->sysdata)->index

 static inline int pci_proc_domain(struct pci_bus *bus)
 {
 	struct pci_controller *hose = bus->sysdata;
 	return hose->need_domain_info;
 }

 static inline void
 pcibios_add_platform_entries(struct pci_dev *dev)
 {
 }

 struct pci_dev *alpha_gendev_to_pci(struct device *dev);

 #endif /* __KERNEL__ */

 /* Values for the `which' argument to sys_pciconfig_iobase.  */
 #define IOBASE_HOSE		0
 #define IOBASE_SPARSE_MEM	1
 #define IOBASE_DENSE_MEM	2
 #define IOBASE_SPARSE_IO	3
 #define IOBASE_DENSE_IO		4
 #define IOBASE_ROOT_BUS		5
 #define IOBASE_FROM_HOSE	0x10000

 #endif /* __ALPHA_PCI_H */
	#ifndef __ALPHA_PCI_H
	#define __ALPHA_PCI_H

	#ifdef __KERNEL__

	#include <linux/spinlock.h>
	#include <asm/scatterlist.h>
	#include <asm/machvec.h>

	/*
	* The following structure is used to manage multiple PCI busses.
	*/

	struct pci_dev;
	struct pci_bus;
	struct resource;
	struct pci_iommu_arena;
	struct page;

	/* A controller. Used to manage multiple PCI busses. */

	struct pci_controller {
	struct pci_controller *next;
	struct pci_bus *bus;
	struct resource *io_space;
	struct resource *mem_space;

	/* The following are for reporting to userland. The invariant is
	that if we report a BWX-capable dense memory, we do not report
	a sparse memory at all, even if it exists. */
	unsigned long sparse_mem_base;
	unsigned long dense_mem_base;
	unsigned long sparse_io_base;
	unsigned long dense_io_base;

	/* This one's for the kernel only. It's in KSEG somewhere. */
	unsigned long config_space_base;

	unsigned int index;
	/* For compatibility with current (as of July 2003) pciutils
	and XFree86. Eventually will be removed. */
	unsigned int need_domain_info;

	struct pci_iommu_arena *sg_pci;
	struct pci_iommu_arena *sg_isa;

	void *sysdata;
	};

	/* Override the logic in pci_scan_bus for skipping already-configured
	bus numbers. */

	#define pcibios_assign_all_busses() 1
	#define pcibios_scan_all_fns(a, b) 0

	#define PCIBIOS_MIN_IO alpha_mv.min_io_address
	#define PCIBIOS_MIN_MEM alpha_mv.min_mem_address

	extern void pcibios_set_master(struct pci_dev *dev);

	extern inline void pcibios_penalize_isa_irq(int irq)
	{
	/* We don't do dynamic PCI IRQ allocation */
	}

	/* IOMMU controls. */

	/* The PCI address space does not 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 0

	/* Allocate and map kernel buffer using consistent mode DMA for PCI
	device. 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 , size_t, dma_addr_t *);

	/* Free and unmap a consistent DMA buffer. CPU_ADDR and DMA_ADDR must
	be values that were returned from pci_alloc_consistent. SIZE must
	be the same as what as passed into pci_alloc_consistent.
	References to the memory and mappings associated with CPU_ADDR or
	DMA_ADDR past this call are illegal. */

	extern void pci_free_consistent(struct pci_dev , size_t, void , dma_addr_t);

	/* Map a single buffer of the indicate size for PCI DMA in streaming mode.
	The 32-bit PCI bus mastering 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 , void , size_t, int);

	/* Likewise, but for a page instead of an address. */
	extern dma_addr_t pci_map_page(struct pci_dev , struct page ,
	unsigned long, size_t, int);

	/* Test for pci_map_single or pci_map_page having generated an error. */

	static inline int
	pci_dma_mapping_error(dma_addr_t dma_addr)
	{
	return dma_addr == 0;
	}

	/* 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 *, dma_addr_t, size_t, int);
	extern void pci_unmap_page(struct pci_dev *, dma_addr_t, size_t, int);

	/* 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))

	/* Map a set of buffers described by scatterlist in streaming mode for
	PCI DMA. This is the scatter-gather version of the above
	pci_map_single interface. Here the scatter gather list elements
	are each tagged with the appropriate PCI 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 , struct scatterlist , int, int);

	/* 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 , struct scatterlist , int, int);

	/* Make physical memory consistent for a single streaming mode DMA
	translation after a transfer and device currently has ownership
	of the buffer.

	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. */

	static inline void
	pci_dma_sync_single_for_cpu(struct pci_dev *dev, dma_addr_t dma_addr,
	long size, int direction)
	{
	/* Nothing to do. */
	}

	static inline void
	pci_dma_sync_single_for_device(struct pci_dev *dev, dma_addr_t dma_addr,
	size_t size, int direction)
	{
	/* 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_for_cpu(struct pci_dev dev, struct scatterlist sg,
	int nents, int direction)
	{
	/* Nothing to do. */
	}

	static inline void
	pci_dma_sync_sg_for_device(struct pci_dev dev, struct scatterlist sg,
	int nents, int direction)
	{
	/* 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. */

	extern int pci_dma_supported(struct pci_dev *hwdev, u64 mask);

	/* True if the machine supports DAC addressing, and DEV can
	make use of it given MASK. */
	extern int pci_dac_dma_supported(struct pci_dev *hwdev, u64 mask);

	/* Convert to/from DAC dma address and struct page. */
	extern dma64_addr_t pci_dac_page_to_dma(struct pci_dev , struct page ,
	unsigned long, int);
	extern struct page pci_dac_dma_to_page(struct pci_dev , dma64_addr_t);
	extern unsigned long pci_dac_dma_to_offset(struct pci_dev *, dma64_addr_t);

	static inline void
	pci_dac_dma_sync_single_for_cpu(struct pci_dev *pdev, dma64_addr_t dma_addr,
	size_t len, int direction)
	{
	/* Nothing to do. */
	}

	static inline void
	pci_dac_dma_sync_single_for_device(struct pci_dev *pdev, dma64_addr_t dma_addr,
	size_t len, int direction)
	{
	/* Nothing to do. */
	}

	static inline void pci_dma_burst_advice(struct pci_dev *pdev,
	enum pci_dma_burst_strategy *strat,
	unsigned long *strategy_parameter)
	{
	unsigned long cacheline_size;
	u8 byte;

	pci_read_config_byte(pdev, PCI_CACHE_LINE_SIZE, &byte);
	if (byte == 0)
	cacheline_size = 1024;
	else
	cacheline_size = (int) byte * 4;

	*strat = PCI_DMA_BURST_BOUNDARY;
	*strategy_parameter = cacheline_size;
	}

	/* TODO: integrate with include/asm-generic/pci.h ? */
	static inline int pci_get_legacy_ide_irq(struct pci_dev *dev, int channel)
	{
	return channel ? 15 : 14;
	}

	extern void pcibios_resource_to_bus(struct pci_dev , struct pci_bus_region ,
	struct resource *);

	#define pci_domain_nr(bus) ((struct pci_controller *)(bus)->sysdata)->index

	static inline int pci_proc_domain(struct pci_bus *bus)
	{
	struct pci_controller *hose = bus->sysdata;
	return hose->need_domain_info;
	}

	static inline void
	pcibios_add_platform_entries(struct pci_dev *dev)
	{
	}

	struct pci_dev alpha_gendev_to_pci(struct device dev);

	#endif /* __KERNEL__ */

	/* Values for the `which' argument to sys_pciconfig_iobase. */
	#define IOBASE_HOSE 0
	#define IOBASE_SPARSE_MEM 1
	#define IOBASE_DENSE_MEM 2
	#define IOBASE_SPARSE_IO 3
	#define IOBASE_DENSE_IO 4
	#define IOBASE_ROOT_BUS 5
	#define IOBASE_FROM_HOSE 0x10000

	#endif /* __ALPHA_PCI_H */