include/asm-ppc64/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_VIO_H
  15 #define _ASM_VIO_H
  16
  17 #include <linux/config.h>
  18 #include <linux/init.h>
  19 #include <linux/errno.h>
  20 #include <linux/device.h>
  21 #include <linux/dma-mapping.h>
  22 #include <asm/hvcall.h>
  23 #include <asm/prom.h>
  24 #include <asm/scatterlist.h>
  25 /*
  26  * Architecture-specific constants for drivers to
  27  * extract attributes of the device using vio_get_attribute()
  28 */
  29 #define VETH_MAC_ADDR "local-mac-address"
  30 #define VETH_MCAST_FILTER_SIZE "ibm,mac-address-filters"
  31
  32 /* End architecture-specific constants */
  33
  34 #define h_vio_signal(ua, mode) \
  35   plpar_hcall_norets(H_VIO_SIGNAL, ua, mode)
  36
  37 #define VIO_IRQ_DISABLE         0UL
  38 #define VIO_IRQ_ENABLE          1UL
  39
  40 struct vio_dev;
  41 struct vio_driver;
  42 struct vio_device_id;
  43 struct iommu_table;
  44
  45 int vio_register_driver(struct vio_driver *drv);
  46 void vio_unregister_driver(struct vio_driver *drv);
  47
  48 #ifdef CONFIG_PPC_PSERIES
  49 struct vio_dev * __devinit vio_register_device_node(
  50                 struct device_node *node_vdev);
  51 #endif
  52 void __devinit vio_unregister_device(struct vio_dev *dev);
  53 struct vio_dev *vio_find_node(struct device_node *vnode);
  54
  55 const void * vio_get_attribute(struct vio_dev *vdev, void* which, int* length);
  56 int vio_get_irq(struct vio_dev *dev);
  57 int vio_enable_interrupts(struct vio_dev *dev);
  58 int vio_disable_interrupts(struct vio_dev *dev);
  59
  60 dma_addr_t vio_map_single(struct vio_dev *dev, void *vaddr,
  61                           size_t size, enum dma_data_direction direction);
  62 void vio_unmap_single(struct vio_dev *dev, dma_addr_t dma_handle,
  63                       size_t size, enum dma_data_direction direction);
  64 int vio_map_sg(struct vio_dev *vdev, struct scatterlist *sglist,
  65                int nelems, enum dma_data_direction direction);
  66 void vio_unmap_sg(struct vio_dev *vdev, struct scatterlist *sglist,
  67                   int nelems, enum dma_data_direction direction);
  68 void *vio_alloc_consistent(struct vio_dev *dev, size_t size,
  69                            dma_addr_t *dma_handle);
  70 void vio_free_consistent(struct vio_dev *dev, size_t size, void *vaddr,
  71                          dma_addr_t dma_handle);
  72
  73 static inline int vio_dma_supported(struct vio_dev *hwdev, u64 mask)
  74 {
  75         return 1;
  76 }
  77
  78 #define vio_map_page(dev, page, off, size, dir) \
  79                 vio_map_single(dev, (page_address(page) + (off)), size, dir)
  80 #define vio_unmap_page(dev,addr,sz,dir) vio_unmap_single(dev,addr,sz,dir)
  81
  82 static inline int vio_set_dma_mask(struct vio_dev *dev, u64 mask)
  83 {
  84         return -EIO;
  85 }
  86
  87 extern struct bus_type vio_bus_type;
  88
  89 struct vio_device_id {
  90         char *type;
  91         char *compat;
  92 };
  93
  94 struct vio_driver {
  95         struct list_head node;
  96         char *name;
  97         const struct vio_device_id *id_table;   /* NULL if wants all devices */
  98         int  (*probe)  (struct vio_dev *dev, const struct vio_device_id *id);   /* New device inserted */
  99         int (*remove) (struct vio_dev *dev);    /* Device removed (NULL if not a hot-plug capable driver) */
 100         unsigned long driver_data;
 101
 102         struct device_driver driver;
 103 };
 104
 105 static inline struct vio_driver *to_vio_driver(struct device_driver *drv)
 106 {
 107         return container_of(drv, struct vio_driver, driver);
 108 }
 109
 110 /*
 111  * The vio_dev structure is used to describe virtual I/O devices.
 112  */
 113 struct vio_dev {
 114         struct iommu_table *iommu_table;     /* vio_map_* uses this */
 115         char *name;
 116         char *type;
 117         uint32_t unit_address;
 118         unsigned int irq;
 119
 120         struct device dev;
 121 };
 122
 123 static inline struct vio_dev *to_vio_dev(struct device *dev)
 124 {
 125         return container_of(dev, struct vio_dev, dev);
 126 }
 127
 128 #endif /* _ASM_VIO_H */