fs: use kmem_cache_zalloc instead
[pv_ops_mirror.git] / include / asm-sparc64 / sbus.h
blob0151cad486f3c86454428d4af9c1ebfd88afc68c
1 /* sbus.h: Defines for the Sun SBus.
3 * Copyright (C) 1996, 1999, 2007 David S. Miller (davem@davemloft.net)
4 */
6 #ifndef _SPARC64_SBUS_H
7 #define _SPARC64_SBUS_H
9 #include <linux/dma-mapping.h>
10 #include <linux/ioport.h>
12 #include <asm/oplib.h>
13 #include <asm/prom.h>
14 #include <asm/of_device.h>
15 #include <asm/iommu.h>
16 #include <asm/scatterlist.h>
18 /* We scan which devices are on the SBus using the PROM node device
19 * tree. SBus devices are described in two different ways. You can
20 * either get an absolute address at which to access the device, or
21 * you can get a SBus 'slot' number and an offset within that slot.
24 /* The base address at which to calculate device OBIO addresses. */
25 #define SUN_SBUS_BVADDR 0x00000000
26 #define SBUS_OFF_MASK 0x0fffffff
28 /* These routines are used to calculate device address from slot
29 * numbers + offsets, and vice versa.
32 static __inline__ unsigned long sbus_devaddr(int slotnum, unsigned long offset)
34 return (unsigned long) (SUN_SBUS_BVADDR+((slotnum)<<28)+(offset));
37 static __inline__ int sbus_dev_slot(unsigned long dev_addr)
39 return (int) (((dev_addr)-SUN_SBUS_BVADDR)>>28);
42 struct sbus_bus;
44 /* Linux SBUS device tables */
45 struct sbus_dev {
46 struct of_device ofdev;
47 struct sbus_bus *bus;
48 struct sbus_dev *next;
49 struct sbus_dev *child;
50 struct sbus_dev *parent;
51 int prom_node;
52 char prom_name[64];
53 int slot;
55 struct resource resource[PROMREG_MAX];
57 struct linux_prom_registers reg_addrs[PROMREG_MAX];
58 int num_registers;
60 struct linux_prom_ranges device_ranges[PROMREG_MAX];
61 int num_device_ranges;
63 unsigned int irqs[4];
64 int num_irqs;
66 #define to_sbus_device(d) container_of(d, struct sbus_dev, ofdev.dev)
68 /* This struct describes the SBus(s) found on this machine. */
69 struct sbus_bus {
70 struct of_device ofdev;
71 struct sbus_dev *devices; /* Tree of SBUS devices */
72 struct sbus_bus *next; /* Next SBUS in system */
73 int prom_node; /* OBP node of SBUS */
74 char prom_name[64]; /* Usually "sbus" or "sbi" */
75 int clock_freq;
77 struct linux_prom_ranges sbus_ranges[PROMREG_MAX];
78 int num_sbus_ranges;
80 int portid;
82 #define to_sbus(d) container_of(d, struct sbus_bus, ofdev.dev)
84 extern struct sbus_bus *sbus_root;
86 /* Device probing routines could find these handy */
87 #define for_each_sbus(bus) \
88 for((bus) = sbus_root; (bus); (bus)=(bus)->next)
90 #define for_each_sbusdev(device, bus) \
91 for((device) = (bus)->devices; (device); (device)=(device)->next)
93 #define for_all_sbusdev(device, bus) \
94 for ((bus) = sbus_root; (bus); (bus) = (bus)->next) \
95 for ((device) = (bus)->devices; (device); (device) = (device)->next)
97 /* Driver DVMA interfaces. */
98 #define sbus_can_dma_64bit(sdev) (1)
99 #define sbus_can_burst64(sdev) (1)
100 extern void sbus_set_sbus64(struct sbus_dev *, int);
101 extern void sbus_fill_device_irq(struct sbus_dev *);
103 static inline void *sbus_alloc_consistent(struct sbus_dev *sdev , size_t size,
104 dma_addr_t *dma_handle)
106 return dma_alloc_coherent(&sdev->ofdev.dev, size,
107 dma_handle, GFP_ATOMIC);
110 static inline void sbus_free_consistent(struct sbus_dev *sdev, size_t size,
111 void *vaddr, dma_addr_t dma_handle)
113 return dma_free_coherent(&sdev->ofdev.dev, size, vaddr, dma_handle);
116 #define SBUS_DMA_BIDIRECTIONAL DMA_BIDIRECTIONAL
117 #define SBUS_DMA_TODEVICE DMA_TO_DEVICE
118 #define SBUS_DMA_FROMDEVICE DMA_FROM_DEVICE
119 #define SBUS_DMA_NONE DMA_NONE
121 /* All the rest use streaming mode mappings. */
122 static inline dma_addr_t sbus_map_single(struct sbus_dev *sdev, void *ptr,
123 size_t size, int direction)
125 return dma_map_single(&sdev->ofdev.dev, ptr, size,
126 (enum dma_data_direction) direction);
129 static inline void sbus_unmap_single(struct sbus_dev *sdev,
130 dma_addr_t dma_addr, size_t size,
131 int direction)
133 dma_unmap_single(&sdev->ofdev.dev, dma_addr, size,
134 (enum dma_data_direction) direction);
137 static inline int sbus_map_sg(struct sbus_dev *sdev, struct scatterlist *sg,
138 int nents, int direction)
140 return dma_map_sg(&sdev->ofdev.dev, sg, nents,
141 (enum dma_data_direction) direction);
144 static inline void sbus_unmap_sg(struct sbus_dev *sdev, struct scatterlist *sg,
145 int nents, int direction)
147 dma_unmap_sg(&sdev->ofdev.dev, sg, nents,
148 (enum dma_data_direction) direction);
151 /* Finally, allow explicit synchronization of streamable mappings. */
152 static inline void sbus_dma_sync_single_for_cpu(struct sbus_dev *sdev,
153 dma_addr_t dma_handle,
154 size_t size, int direction)
156 dma_sync_single_for_cpu(&sdev->ofdev.dev, dma_handle, size,
157 (enum dma_data_direction) direction);
159 #define sbus_dma_sync_single sbus_dma_sync_single_for_cpu
161 static inline void sbus_dma_sync_single_for_device(struct sbus_dev *sdev,
162 dma_addr_t dma_handle,
163 size_t size, int direction)
165 /* No flushing needed to sync cpu writes to the device. */
168 static inline void sbus_dma_sync_sg_for_cpu(struct sbus_dev *sdev,
169 struct scatterlist *sg,
170 int nents, int direction)
172 dma_sync_sg_for_cpu(&sdev->ofdev.dev, sg, nents,
173 (enum dma_data_direction) direction);
175 #define sbus_dma_sync_sg sbus_dma_sync_sg_for_cpu
177 static inline void sbus_dma_sync_sg_for_device(struct sbus_dev *sdev,
178 struct scatterlist *sg,
179 int nents, int direction)
181 /* No flushing needed to sync cpu writes to the device. */
184 extern void sbus_arch_bus_ranges_init(struct device_node *, struct sbus_bus *);
185 extern void sbus_setup_iommu(struct sbus_bus *, struct device_node *);
186 extern void sbus_setup_arch_props(struct sbus_bus *, struct device_node *);
187 extern int sbus_arch_preinit(void);
188 extern void sbus_arch_postinit(void);
190 #endif /* !(_SPARC64_SBUS_H) */