include/asm-powerpc/vio.h

   1 /*
   2  * IBM PowerPC Virtual I/O Infrastructure Support.
   3  *
   4  * Copyright (c) 2003 IBM Corp.
   5  *  Dave Engebretsen engebret@us.ibm.com
   6  *  Santiago Leon santil@us.ibm.com
   7  *
   8  * This program is free software; you can redistribute it and/or
   9  * modify it under the terms of the GNU General Public License
  10  * as published by the Free Software Foundation; either version
  11  * 2 of the License, or (at your option) any later version.
  12  */
  13
  14 #ifndef _ASM_POWERPC_VIO_H
  15 #define _ASM_POWERPC_VIO_H
  16 #ifdef __KERNEL__
  17
  18 #include <linux/config.h>
  19 #include <linux/init.h>
  20 #include <linux/errno.h>
  21 #include <linux/device.h>
  22 #include <linux/dma-mapping.h>
  23 #include <linux/mod_devicetable.h>
  24
  25 #include <asm/hvcall.h>
  26 #include <asm/scatterlist.h>
  27
  28 /*
  29  * Architecture-specific constants for drivers to
  30  * extract attributes of the device using vio_get_attribute()
  31  */
  32 #define VETH_MAC_ADDR "local-mac-address"
  33 #define VETH_MCAST_FILTER_SIZE "ibm,mac-address-filters"
  34
  35 /* End architecture-specific constants */
  36
  37 #define h_vio_signal(ua, mode) \
  38   plpar_hcall_norets(H_VIO_SIGNAL, ua, mode)
  39
  40 #define VIO_IRQ_DISABLE         0UL
  41 #define VIO_IRQ_ENABLE          1UL
  42
  43 struct iommu_table;
  44
  45 /*
  46  * The vio_dev structure is used to describe virtual I/O devices.
  47  */
  48 struct vio_dev {
  49         struct iommu_table *iommu_table;     /* vio_map_* uses this */
  50         char *name;
  51         char *type;
  52         uint32_t unit_address;
  53         unsigned int irq;
  54         struct device dev;
  55 };
  56
  57 struct vio_driver {
  58         struct list_head node;
  59         const struct vio_device_id *id_table;
  60         int (*probe)(struct vio_dev *dev, const struct vio_device_id *id);
  61         int (*remove)(struct vio_dev *dev);
  62         void (*shutdown)(struct vio_dev *dev);
  63         unsigned long driver_data;
  64         struct device_driver driver;
  65 };
  66
  67 struct vio_bus_ops {
  68         int (*match)(const struct vio_device_id *id, const struct vio_dev *dev);
  69         struct iommu_table *(*build_iommu_table)(struct vio_dev *dev);
  70 };
  71
  72 extern struct dma_mapping_ops vio_dma_ops;
  73 extern struct bus_type vio_bus_type;
  74 extern struct vio_dev vio_bus_device;
  75
  76 extern int vio_register_driver(struct vio_driver *drv);
  77 extern void vio_unregister_driver(struct vio_driver *drv);
  78
  79 extern struct vio_dev * __devinit vio_register_device(struct vio_dev *viodev);
  80 extern void __devinit vio_unregister_device(struct vio_dev *dev);
  81
  82 extern int vio_bus_init(struct vio_bus_ops *);
  83
  84 struct device_node;
  85
  86 extern struct vio_dev * __devinit vio_register_device_node(
  87                 struct device_node *node_vdev);
  88 extern const void *vio_get_attribute(struct vio_dev *vdev, char *which,
  89                 int *length);
  90 #ifdef CONFIG_PPC_PSERIES
  91 extern struct vio_dev *vio_find_node(struct device_node *vnode);
  92 extern int vio_enable_interrupts(struct vio_dev *dev);
  93 extern int vio_disable_interrupts(struct vio_dev *dev);
  94 #endif
  95
  96 static inline struct vio_driver *to_vio_driver(struct device_driver *drv)
  97 {
  98         return container_of(drv, struct vio_driver, driver);
  99 }
 100
 101 static inline struct vio_dev *to_vio_dev(struct device *dev)
 102 {
 103         return container_of(dev, struct vio_dev, dev);
 104 }
 105
 106 #endif /* __KERNEL__ */
 107 #endif /* _ASM_POWERPC_VIO_H */