include/asm-sparc64/pci.h - maze/linux - Git at Google

 #ifndef __SPARC64_PCI_H
 #define __SPARC64_PCI_H

 #ifdef __KERNEL__

 #include <linux/fs.h>
 #include <linux/mm.h>

 /* 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

 static inline void pcibios_set_master(struct pci_dev *dev)
 {
 	/* No special bus mastering setup handling */
 }

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

 /* Dynamic DMA mapping stuff.
  */

 /* 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)

 #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 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_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);

 /* No highmem on sparc64, plus we have an IOMMU, so mapping pages is easy. */
 #define pci_map_page(dev, page, off, size, dir) \
 	pci_map_single(dev, (page_address(page) + (off)), size, dir)
 #define pci_unmap_page(dev,addr,sz,dir) pci_unmap_single(dev,addr,sz,dir)

 /* 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 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 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);

 static inline void
 pci_dma_sync_single_for_device(struct pci_dev *hwdev, dma_addr_t dma_handle,
 			       size_t size, int direction)
 {
 	/* No flushing needed to sync cpu writes to the device.  */
 	BUG_ON(direction == PCI_DMA_NONE);
 }

 /* 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);

 static inline void
 pci_dma_sync_sg_for_device(struct pci_dev *hwdev, struct scatterlist *sg,
 			int nelems, int direction)
 {
 	/* No flushing needed to sync cpu writes to the device.  */
 	BUG_ON(direction == PCI_DMA_NONE);
 }

 /* 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);

 /* PCI IOMMU mapping bypass support. */

 /* PCI 64-bit addressing works for all slots on all controller
  * types on sparc64.  However, it requires that the device
  * can drive enough of the 64 bits.
  */
 #define PCI64_REQUIRED_MASK	(~(dma64_addr_t)0)
 #define PCI64_ADDR_BASE		0xfffc000000000000UL

 /* Usage of the pci_dac_foo interfaces is only valid if this
  * test passes.
  */
 #define pci_dac_dma_supported(pci_dev, mask) \
 	((((mask) & PCI64_REQUIRED_MASK) == PCI64_REQUIRED_MASK) ? 1 : 0)

 static inline dma64_addr_t
 pci_dac_page_to_dma(struct pci_dev *pdev, struct page *page, unsigned long offset, int direction)
 {
 	return (PCI64_ADDR_BASE +
 		__pa(page_address(page)) + offset);
 }

 static inline struct page *
 pci_dac_dma_to_page(struct pci_dev *pdev, dma64_addr_t dma_addr)
 {
 	unsigned long paddr = (dma_addr & PAGE_MASK) - PCI64_ADDR_BASE;

 	return virt_to_page(__va(paddr));
 }

 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_for_cpu(struct pci_dev *pdev, dma64_addr_t dma_addr, size_t len, int direction)
 {
 	/* DAC cycle addressing does not make use of the
 	 * PCI controller's streaming cache, so 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)
 {
 	/* DAC cycle addressing does not make use of the
 	 * PCI controller's streaming cache, so nothing to do.
 	 */
 }

 #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);
 }

 #ifdef CONFIG_PCI
 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;
 }
 #endif

 /* Return the index of the PCI controller for device PDEV. */

 extern int pci_domain_nr(struct pci_bus *bus);
 static inline int pci_proc_domain(struct pci_bus *bus)
 {
 	return 1;
 }

 /* Platform support for /proc/bus/pci/X/Y mmap()s. */

 #define HAVE_PCI_MMAP
 #define HAVE_ARCH_PCI_GET_UNMAPPED_AREA
 #define get_pci_unmapped_area get_fb_unmapped_area

 extern int pci_mmap_page_range(struct pci_dev *dev, struct vm_area_struct *vma,
 			       enum pci_mmap_state mmap_state,
 			       int write_combine);

 /* Platform specific MWI support. */
 #define HAVE_ARCH_PCI_MWI
 extern int pcibios_prep_mwi(struct pci_dev *dev);

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

 extern void
 pcibios_bus_to_resource(struct pci_dev *dev, struct resource *res,
 			struct pci_bus_region *region);

 extern struct resource *pcibios_select_root(struct pci_dev *, struct resource *);

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

 static inline int pci_get_legacy_ide_irq(struct pci_dev *dev, int channel)
 {
 	return PCI_IRQ_NONE;
 }

 #endif /* __KERNEL__ */

 #endif /* __SPARC64_PCI_H */
	#ifndef __SPARC64_PCI_H
	#define __SPARC64_PCI_H

	#ifdef __KERNEL__

	#include <linux/fs.h>
	#include <linux/mm.h>

	/* 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

	static inline void pcibios_set_master(struct pci_dev *dev)
	{
	/* No special bus mastering setup handling */
	}

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

	/* Dynamic DMA mapping stuff.
	*/

	/* 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)

	#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 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_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);

	/* No highmem on sparc64, plus we have an IOMMU, so mapping pages is easy. */
	#define pci_map_page(dev, page, off, size, dir) \
	pci_map_single(dev, (page_address(page) + (off)), size, dir)
	#define pci_unmap_page(dev,addr,sz,dir) pci_unmap_single(dev,addr,sz,dir)

	/* 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 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 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);

	static inline void
	pci_dma_sync_single_for_device(struct pci_dev *hwdev, dma_addr_t dma_handle,
	size_t size, int direction)
	{
	/* No flushing needed to sync cpu writes to the device. */
	BUG_ON(direction == PCI_DMA_NONE);
	}

	/* 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);

	static inline void
	pci_dma_sync_sg_for_device(struct pci_dev hwdev, struct scatterlist sg,
	int nelems, int direction)
	{
	/* No flushing needed to sync cpu writes to the device. */
	BUG_ON(direction == PCI_DMA_NONE);
	}

	/* 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);

	/* PCI IOMMU mapping bypass support. */

	/* PCI 64-bit addressing works for all slots on all controller
	* types on sparc64. However, it requires that the device
	* can drive enough of the 64 bits.
	*/
	#define PCI64_REQUIRED_MASK (~(dma64_addr_t)0)
	#define PCI64_ADDR_BASE 0xfffc000000000000UL

	/* Usage of the pci_dac_foo interfaces is only valid if this
	* test passes.
	*/
	#define pci_dac_dma_supported(pci_dev, mask) \
	((((mask) & PCI64_REQUIRED_MASK) == PCI64_REQUIRED_MASK) ? 1 : 0)

	static inline dma64_addr_t
	pci_dac_page_to_dma(struct pci_dev pdev, struct page page, unsigned long offset, int direction)
	{
	return (PCI64_ADDR_BASE +
	__pa(page_address(page)) + offset);
	}

	static inline struct page *
	pci_dac_dma_to_page(struct pci_dev *pdev, dma64_addr_t dma_addr)
	{
	unsigned long paddr = (dma_addr & PAGE_MASK) - PCI64_ADDR_BASE;

	return virt_to_page(__va(paddr));
	}

	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_for_cpu(struct pci_dev *pdev, dma64_addr_t dma_addr, size_t len, int direction)
	{
	/* DAC cycle addressing does not make use of the
	* PCI controller's streaming cache, so 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)
	{
	/* DAC cycle addressing does not make use of the
	* PCI controller's streaming cache, so nothing to do.
	*/
	}

	#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);
	}

	#ifdef CONFIG_PCI
	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;
	}
	#endif

	/* Return the index of the PCI controller for device PDEV. */

	extern int pci_domain_nr(struct pci_bus *bus);
	static inline int pci_proc_domain(struct pci_bus *bus)
	{
	return 1;
	}

	/* Platform support for /proc/bus/pci/X/Y mmap()s. */

	#define HAVE_PCI_MMAP
	#define HAVE_ARCH_PCI_GET_UNMAPPED_AREA
	#define get_pci_unmapped_area get_fb_unmapped_area

	extern int pci_mmap_page_range(struct pci_dev dev, struct vm_area_struct vma,
	enum pci_mmap_state mmap_state,
	int write_combine);

	/* Platform specific MWI support. */
	#define HAVE_ARCH_PCI_MWI
	extern int pcibios_prep_mwi(struct pci_dev *dev);

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

	extern void
	pcibios_bus_to_resource(struct pci_dev dev, struct resource res,
	struct pci_bus_region *region);

	extern struct resource pcibios_select_root(struct pci_dev , struct resource *);

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

	static inline int pci_get_legacy_ide_irq(struct pci_dev *dev, int channel)
	{
	return PCI_IRQ_NONE;
	}

	#endif /* __KERNEL__ */

	#endif /* __SPARC64_PCI_H */