/* sbus.h: Defines for the Sun SBus. * * Copyright (C) 1996, 1999, 2007 David S. Miller (davem@davemloft.net) */ #ifndef _SPARC64_SBUS_H #define _SPARC64_SBUS_H #include <linux/dma-mapping.h> #include <linux/ioport.h> #include <asm/oplib.h> #include <asm/prom.h> #include <asm/of_device.h> #include <asm/iommu.h> #include <asm/scatterlist.h> /* We scan which devices are on the SBus using the PROM node device * tree. SBus devices are described in two different ways. You can * either get an absolute address at which to access the device, or * you can get a SBus 'slot' number and an offset within that slot. */ /* The base address at which to calculate device OBIO addresses. */ #define SUN_SBUS_BVADDR 0x00000000 #define SBUS_OFF_MASK 0x0fffffff /* These routines are used to calculate device address from slot * numbers + offsets, and vice versa. */ static inline unsigned long sbus_devaddr(int slotnum, unsigned long offset) { return (unsigned long) (SUN_SBUS_BVADDR+((slotnum)<<28)+(offset)); } static inline int sbus_dev_slot(unsigned long dev_addr) { return (int) (((dev_addr)-SUN_SBUS_BVADDR)>>28); } struct sbus_bus; /* Linux SBUS device tables */ struct sbus_dev { struct of_device ofdev; struct sbus_bus *bus; struct sbus_dev *next; struct sbus_dev *child; struct sbus_dev *parent; int prom_node; char prom_name[64]; int slot; struct resource resource[PROMREG_MAX]; struct linux_prom_registers reg_addrs[PROMREG_MAX]; int num_registers; struct linux_prom_ranges device_ranges[PROMREG_MAX]; int num_device_ranges; unsigned int irqs[4]; int num_irqs; }; #define to_sbus_device(d) container_of(d, struct sbus_dev, ofdev.dev) /* This struct describes the SBus(s) found on this machine. */ struct sbus_bus { struct of_device ofdev; struct sbus_dev *devices; /* Tree of SBUS devices */ struct sbus_bus *next; /* Next SBUS in system */ int prom_node; /* OBP node of SBUS */ char prom_name[64]; /* Usually "sbus" or "sbi" */ int clock_freq; struct linux_prom_ranges sbus_ranges[PROMREG_MAX]; int num_sbus_ranges; int portid; }; #define to_sbus(d) container_of(d, struct sbus_bus, ofdev.dev) extern struct sbus_bus *sbus_root; /* Device probing routines could find these handy */ #define for_each_sbus(bus) \ for((bus) = sbus_root; (bus); (bus)=(bus)->next) #define for_each_sbusdev(device, bus) \ for((device) = (bus)->devices; (device); (device)=(device)->next) #define for_all_sbusdev(device, bus) \ for ((bus) = sbus_root; (bus); (bus) = (bus)->next) \ for ((device) = (bus)->devices; (device); (device) = (device)->next) /* Driver DVMA interfaces. */ #define sbus_can_dma_64bit(sdev) (1) #define sbus_can_burst64(sdev) (1) extern void sbus_set_sbus64(struct sbus_dev *, int); extern void sbus_fill_device_irq(struct sbus_dev *); static inline void *sbus_alloc_consistent(struct sbus_dev *sdev , size_t size, dma_addr_t *dma_handle) { return dma_alloc_coherent(&sdev->ofdev.dev, size, dma_handle, GFP_ATOMIC); } static inline void sbus_free_consistent(struct sbus_dev *sdev, size_t size, void *vaddr, dma_addr_t dma_handle) { return dma_free_coherent(&sdev->ofdev.dev, size, vaddr, dma_handle); } #define SBUS_DMA_BIDIRECTIONAL DMA_BIDIRECTIONAL #define SBUS_DMA_TODEVICE DMA_TO_DEVICE #define SBUS_DMA_FROMDEVICE DMA_FROM_DEVICE #define SBUS_DMA_NONE DMA_NONE /* All the rest use streaming mode mappings. */ static inline dma_addr_t sbus_map_single(struct sbus_dev *sdev, void *ptr, size_t size, int direction) { return dma_map_single(&sdev->ofdev.dev, ptr, size, (enum dma_data_direction) direction); } static inline void sbus_unmap_single(struct sbus_dev *sdev, dma_addr_t dma_addr, size_t size, int direction) { dma_unmap_single(&sdev->ofdev.dev, dma_addr, size, (enum dma_data_direction) direction); } static inline int sbus_map_sg(struct sbus_dev *sdev, struct scatterlist *sg, int nents, int direction) { return dma_map_sg(&sdev->ofdev.dev, sg, nents, (enum dma_data_direction) direction); } static inline void sbus_unmap_sg(struct sbus_dev *sdev, struct scatterlist *sg, int nents, int direction) { dma_unmap_sg(&sdev->ofdev.dev, sg, nents, (enum dma_data_direction) direction); } /* Finally, allow explicit synchronization of streamable mappings. */ static inline void sbus_dma_sync_single_for_cpu(struct sbus_dev *sdev, dma_addr_t dma_handle, size_t size, int direction) { dma_sync_single_for_cpu(&sdev->ofdev.dev, dma_handle, size, (enum dma_data_direction) direction); } #define sbus_dma_sync_single sbus_dma_sync_single_for_cpu static inline void sbus_dma_sync_single_for_device(struct sbus_dev *sdev, dma_addr_t dma_handle, size_t size, int direction) { /* No flushing needed to sync cpu writes to the device. */ } static inline void sbus_dma_sync_sg_for_cpu(struct sbus_dev *sdev, struct scatterlist *sg, int nents, int direction) { dma_sync_sg_for_cpu(&sdev->ofdev.dev, sg, nents, (enum dma_data_direction) direction); } #define sbus_dma_sync_sg sbus_dma_sync_sg_for_cpu static inline void sbus_dma_sync_sg_for_device(struct sbus_dev *sdev, struct scatterlist *sg, int nents, int direction) { /* No flushing needed to sync cpu writes to the device. */ } extern void sbus_arch_bus_ranges_init(struct device_node *, struct sbus_bus *); extern void sbus_setup_iommu(struct sbus_bus *, struct device_node *); extern void sbus_setup_arch_props(struct sbus_bus *, struct device_node *); extern int sbus_arch_preinit(void); extern void sbus_arch_postinit(void); #endif /* !(_SPARC64_SBUS_H) */