/* SPDX-License-Identifier: MIT OR X11
 *
 * Copyright © 2024 Enrico Weigelt, metux IT consult <info@metux.net>
 * Copyright © 2012 Red Hat.
 */
#ifndef _XSERVER_XF86_PLATFORM_BUS_PRIV_H_
#define _XSERVER_XF86_PLATFORM_BUS_PRIV_H_

#include <X11/Xdefs.h>

#include "xf86platformBus.h"

/* xf86_platform_device flags */
#define XF86_PDEV_UNOWNED       0x01
#define XF86_PDEV_SERVER_FD     0x02
#define XF86_PDEV_PAUSED        0x04

#ifdef XSERVER_PLATFORM_BUS
int xf86platformProbe(void);
int xf86platformProbeDev(DriverPtr drvp);
int xf86platformAddGPUDevices(DriverPtr drvp);
void xf86MergeOutputClassOptions(int entityIndex, void **options);
void xf86PlatformScanPciDev(void);
const char *xf86PlatformFindHotplugDriver(int dev_index);

extern int xf86_num_platform_devices;
extern struct xf86_platform_device *xf86_platform_devices;

int xf86_add_platform_device(struct OdevAttributes *attribs, Bool unowned);
int xf86_remove_platform_device(int dev_index);
Bool xf86_get_platform_device_unowned(int index);

int xf86platformAddDevice(const char *driver_name, int index);
void xf86platformRemoveDevice(int index);

static inline struct OdevAttributes *
xf86_platform_device_odev_attributes(struct xf86_platform_device *device)
{
    return device->attribs;
}

static inline struct OdevAttributes *
xf86_platform_odev_attributes(int index)
{
    struct xf86_platform_device *device = &xf86_platform_devices[index];

    return device->attribs;
}

#ifndef _XORG_CONFIG_H_
/*
 * Define the legacy API only for external builds
 */

/* path to kernel device node - Linux e.g. /dev/dri/card0 */
#define ODEV_ATTRIB_PATH        1
/* system device path - Linux e.g. /sys/devices/pci0000:00/0000:00:01.0/0000:01:00.0/drm/card1 */
#define ODEV_ATTRIB_SYSPATH     2
/* DRI-style bus id */
#define ODEV_ATTRIB_BUSID       3
/* Server managed FD */
#define ODEV_ATTRIB_FD          4
/* Major number of the device node pointed to by ODEV_ATTRIB_PATH */
#define ODEV_ATTRIB_MAJOR       5
/* Minor number of the device node pointed to by ODEV_ATTRIB_PATH */
#define ODEV_ATTRIB_MINOR       6
/* kernel driver name */
#define ODEV_ATTRIB_DRIVER      7

/* Protect against a mismatch attribute type by generating a compiler
 * error using a negative array size when an incorrect attribute is
 * passed
 */

#define _ODEV_ATTRIB_IS_STRING(x)       ((x) == ODEV_ATTRIB_PATH ||     \
                                         (x) == ODEV_ATTRIB_SYSPATH ||  \
                                         (x) == ODEV_ATTRIB_BUSID ||    \
                                         (x) == ODEV_ATTRIB_DRIVER)

#define _ODEV_ATTRIB_STRING_CHECK(x)    ((int (*)[_ODEV_ATTRIB_IS_STRING(x)-1]) 0)

static inline char *
_xf86_get_platform_device_attrib(struct xf86_platform_device *device, int attrib, int (*fake)[0])
{
    switch (attrib) {
    case ODEV_ATTRIB_PATH:
        return xf86_platform_device_odev_attributes(device)->path;
    case ODEV_ATTRIB_SYSPATH:
        return xf86_platform_device_odev_attributes(device)->syspath;
    case ODEV_ATTRIB_BUSID:
        return xf86_platform_device_odev_attributes(device)->busid;
    case ODEV_ATTRIB_DRIVER:
        return xf86_platform_device_odev_attributes(device)->driver;
    default:
        assert(FALSE);
        return NULL;
    }
}

#define xf86_get_platform_device_attrib(device, attrib) _xf86_get_platform_device_attrib(device,attrib,_ODEV_ATTRIB_STRING_CHECK(attrib))

#define _ODEV_ATTRIB_IS_INT(x)                  ((x) == ODEV_ATTRIB_FD || (x) == ODEV_ATTRIB_MAJOR || (x) == ODEV_ATTRIB_MINOR)
#define _ODEV_ATTRIB_INT_DEFAULT(x)             ((x) == ODEV_ATTRIB_FD ? -1 : 0)
#define _ODEV_ATTRIB_DEFAULT_CHECK(x,def)       (_ODEV_ATTRIB_INT_DEFAULT(x) == (def))
#define _ODEV_ATTRIB_INT_CHECK(x,def)           ((int (*)[_ODEV_ATTRIB_IS_INT(x)*_ODEV_ATTRIB_DEFAULT_CHECK(x,def)-1]) 0)

static inline int
_xf86_get_platform_device_int_attrib(struct xf86_platform_device *device, int attrib, int (*fake)[0])
{
    switch (attrib) {
    case ODEV_ATTRIB_FD:
        return xf86_platform_device_odev_attributes(device)->fd;
    case ODEV_ATTRIB_MAJOR:
        return xf86_platform_device_odev_attributes(device)->major;
    case ODEV_ATTRIB_MINOR:
        return xf86_platform_device_odev_attributes(device)->minor;
    default:
        assert(FALSE);
        return 0;
    }
}

#define xf86_get_platform_device_int_attrib(device, attrib, def) _xf86_get_platform_device_int_attrib(device,attrib,_ODEV_ATTRIB_INT_CHECK(attrib,def))

#endif /* _XORG_CONFIG_H_ */

extern void xf86platformVTProbe(void);
extern void xf86platformPrimary(void);

#else /* XSERVER_PLATFORM_BUS */

static inline int xf86platformAddGPUDevices(DriverPtr drvp) { return FALSE; }
static inline void xf86MergeOutputClassOptions(int index, void **options) {}

#endif /* XSERVER_PLATFORM_BUS */

#endif /* _XSERVER_XF86_PLATFORM_BUS_PRIV_H_ */