LXR linux-old/include/asm-ppc64/vio.h

   1/*
   2 * IBM PowerPC Virtual I/O Infrastructure Support.
   3 *
   4 * Dave Engebretsen engebret@us.ibm.com
   5 *    Copyright (c) 2003 Dave Engebretsen
   6 *
   7 *      This program is free software; you can redistribute it and/or
   8 *      modify it under the terms of the GNU General Public License
   9 *      as published by the Free Software Foundation; either version
  10 *      2 of the License, or (at your option) any later version.
  11 */
  12
  13#ifndef _VIO_H
  14#define _VIO_H
  15
  16#include <linux/init.h>
  17#include <linux/errno.h>
  18#include <asm/hvcall.h>
  19#include <asm/prom.h>
  20#include <asm/scatterlist.h>
  21/*
  22 * Architecture-specific constants for drivers to
  23 * extract attributes of the device using vio_get_attribute()
  24*/
  25#define VETH_MAC_ADDR "local-mac-address"
  26#define VETH_MCAST_FILTER_SIZE "ibm,mac-address-filters"
  27
  28/* End architecture-specific constants */
  29
  30#define h_vio_signal(ua, mode) \
  31  plpar_hcall_norets(H_VIO_SIGNAL, ua, mode)
  32
  33#define VIO_IRQ_DISABLE         0UL
  34#define VIO_IRQ_ENABLE          1UL
  35
  36struct vio_dev;
  37struct vio_driver;
  38struct vio_device_id;
  39struct TceTable;
  40
  41int vio_register_driver(struct vio_driver *drv);
  42int vio_unregister_driver(struct vio_driver *drv);
  43const struct vio_device_id * vio_match_device(const struct vio_device_id *ids,
  44                                                const struct vio_dev *dev);
  45struct vio_dev * __devinit vio_register_device(struct device_node *node_vdev);
  46struct vio_driver * __devinit vio_find_driver(struct vio_dev* dev);
  47const void * vio_get_attribute(struct vio_dev *vdev, void* which, int* length);
  48int vio_get_irq(struct vio_dev *dev);
  49struct TceTable * vio_build_tce_table(struct vio_dev *dev);
  50int vio_enable_interrupts(struct vio_dev *dev);
  51int vio_disable_interrupts(struct vio_dev *dev);
  52
  53dma_addr_t vio_map_single(struct vio_dev *dev, void *vaddr,
  54                          size_t size, int direction);
  55void vio_unmap_single(struct vio_dev *dev, dma_addr_t dma_handle,
  56                      size_t size, int direction);
  57int vio_map_sg(struct vio_dev *vdev, struct scatterlist *sglist,
  58               int nelems, int direction);
  59void vio_unmap_sg(struct vio_dev *vdev, struct scatterlist *sglist,
  60                  int nelems, int direction);
  61void *vio_alloc_consistent(struct vio_dev *dev, size_t size,
  62                           dma_addr_t *dma_handle);
  63void vio_free_consistent(struct vio_dev *dev, size_t size, void *vaddr,
  64                         dma_addr_t dma_handle);
  65
  66struct vio_device_id {
  67        char *type;
  68        char *compat;
  69/* I don't think we need this
  70        unsigned long driver_data;      */ /* Data private to the driver */
  71};
  72
  73struct vio_driver {
  74        struct list_head node;
  75        char *name;
  76        const struct vio_device_id *id_table;   /* NULL if wants all devices */
  77        int  (*probe)  (struct vio_dev *dev, const struct vio_device_id *id);   /* New device inserted */
  78        void (*remove) (struct vio_dev *dev);   /* Device removed (NULL if not a hot-plug capable driver) */
  79        unsigned long driver_data;
  80};
  81
  82struct vio_bus;
  83/*
  84 * The vio_dev structure is used to describe virtual I/O devices.
  85 */
  86struct vio_dev {
  87        struct list_head devices_list;   /* node in list of all vio devices */
  88        struct device_node *archdata;    /* Open Firmware node */
  89        struct vio_bus *bus;            /* bus this device is on */
  90        struct vio_driver *driver;      /* owning driver */
  91        void *driver_data;              /* data private to the driver */
  92        unsigned long unit_address;
  93
  94        struct TceTable *tce_table; /* vio_map_* uses this */
  95        unsigned int irq;
  96        struct proc_dir_entry *procent; /* device entry in /proc/bus/vio */
  97};
  98
  99struct vio_bus {
 100        struct list_head devices;       /* list of virtual devices */
 101};
 102
 103
 104static inline int vio_module_init(struct vio_driver *drv)
 105{
 106        int rc = vio_register_driver (drv);
 107
 108        if (rc > 0)
 109                return 0;
 110
 111        /* iff CONFIG_HOTPLUG and built into kernel, we should
 112         * leave the driver around for future hotplug events.
 113         * For the module case, a hotplug daemon of some sort
 114         * should load a module in response to an insert event. */
 115#if defined(CONFIG_HOTPLUG) && !defined(MODULE)
 116        if (rc == 0)
 117                return 0;
 118#else
 119        if (rc == 0)
 120                rc = -ENODEV;
 121#endif
 122
 123        /* if we get here, we need to clean up vio driver instance
 124         * and return some sort of error */
 125
 126        return rc;
 127}
 128
 129#endif /* _PHYP_H */
 130