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/*

 * IBM PowerPC Virtual I/O Infrastructure Support.

 *

 * Dave Engebretsen engebret@us.ibm.com

 *    Copyright (c) 2003 Dave Engebretsen

 *

 *      This program is free software; you can redistribute it and/or

 *      modify it under the terms of the GNU General Public License

 *      as published by the Free Software Foundation; either version

 *      2 of the License, or (at your option) any later version.

 */

#ifndef _VIO_H

#define _VIO_H

#include <linux/init.h>

#include <linux/errno.h>

#include <asm/hvcall.h>

#include <asm/prom.h>

#include <asm/scatterlist.h>

/*

 * Architecture-specific constants for drivers to

 * extract attributes of the device using vio_get_attribute()

*/

#define VETH_MAC_ADDR "local-mac-address"

#define VETH_MCAST_FILTER_SIZE "ibm,mac-address-filters"

/* End architecture-specific constants */

#define h_vio_signal(ua, mode) \

  plpar_hcall_norets(H_VIO_SIGNAL, ua, mode)

#define VIO_IRQ_DISABLE         0UL

#define VIO_IRQ_ENABLE          1UL

struct vio_dev;

struct vio_driver;

struct vio_device_id;

struct TceTable;

int vio_register_driver(struct vio_driver *drv);

int vio_unregister_driver(struct vio_driver *drv);

const struct vio_device_id * vio_match_device(const struct vio_device_id *ids,

                                                const struct vio_dev *dev);

struct vio_dev * __devinit vio_register_device(struct device_node *node_vdev);

struct vio_driver * __devinit vio_find_driver(struct vio_dev* dev);

const void * vio_get_attribute(struct vio_dev *vdev, void* which, int* length);

int vio_get_irq(struct vio_dev *dev);

struct TceTable * vio_build_tce_table(struct vio_dev *dev);

int vio_enable_interrupts(struct vio_dev *dev);

int vio_disable_interrupts(struct vio_dev *dev);

dma_addr_t vio_map_single(struct vio_dev *dev, void *vaddr,

                          size_t size, int direction);

void vio_unmap_single(struct vio_dev *dev, dma_addr_t dma_handle,

                      size_t size, int direction);

int vio_map_sg(struct vio_dev *vdev, struct scatterlist *sglist,

               int nelems, int direction);

void vio_unmap_sg(struct vio_dev *vdev, struct scatterlist *sglist,

                  int nelems, int direction);

void *vio_alloc_consistent(struct vio_dev *dev, size_t size,

                           dma_addr_t *dma_handle);

void vio_free_consistent(struct vio_dev *dev, size_t size, void *vaddr,

                         dma_addr_t dma_handle);

struct vio_device_id {

        char *type;

        char *compat;

/* I don't think we need this

        unsigned long driver_data;      */ /* Data private to the driver */

};

struct vio_driver {

        struct list_head node;

        char *name;

        const struct vio_device_id *id_table;   /* NULL if wants all devices */

        int  (*probe)  (struct vio_dev *dev, const struct vio_device_id *id);   /* New device inserted */

        void (*remove) (struct vio_dev *dev);   /* Device removed (NULL if not a hot-plug capable driver) */

        unsigned long driver_data;

};

struct vio_bus;

/*

 * The vio_dev structure is used to describe virtual I/O devices.

 */

struct vio_dev {

        struct list_head devices_list;   /* node in list of all vio devices */

        struct device_node *archdata;    /* Open Firmware node */

        struct vio_bus *bus;            /* bus this device is on */

        struct vio_driver *driver;      /* owning driver */

        void *driver_data;              /* data private to the driver */

        unsigned long unit_address;

        struct TceTable *tce_table; /* vio_map_* uses this */

        unsigned int irq;

        struct proc_dir_entry *procent; /* device entry in /proc/bus/vio */

};

struct vio_bus {

        struct list_head devices;       /* list of virtual devices */

};

static inline int vio_module_init(struct vio_driver *drv)

{

        int rc = vio_register_driver (drv);

        if (rc > 0)

                return 0;

        /* iff CONFIG_HOTPLUG and built into kernel, we should

         * leave the driver around for future hotplug events.

         * For the module case, a hotplug daemon of some sort

         * should load a module in response to an insert event. */

#if defined(CONFIG_HOTPLUG) && !defined(MODULE)

        if (rc == 0)

                return 0;

#else

        if (rc == 0)

                rc = -ENODEV;

#endif

        /* if we get here, we need to clean up vio driver instance

         * and return some sort of error */

        return rc;

}

#endif /* _PHYP_H */