diff options
author | Keith Packard <keithp@keithp.com> | 2014-07-15 17:31:59 -0700 |
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committer | Keith Packard <keithp@keithp.com> | 2014-07-17 17:11:05 -0700 |
commit | e678b4971b666e65a99c141e0a5f33969aa701b7 (patch) | |
tree | 6e09bc94901524f2df48c6c8ff20111cecef8925 | |
parent | 60c05ce1ab5d9dc7c034b6b3723f43a42ea637d8 (diff) |
xfree86: Provide backward-compatibilty API for OdevAttributes
This allows drivers to compile using the old OdevAttributes API
against a new server. It generates compiler errors if the caller uses
the wrong or undefined attribute types, or if the caller provides an
incorrect default value for an integer attribute.
Signed-off-by: Keith Packard <keithp@keithp.com>
Reviewed-by: Hans de Goede <hdegoede@redhat.com>
-rw-r--r-- | hw/xfree86/common/xf86platformBus.h | 71 |
1 files changed, 71 insertions, 0 deletions
diff --git a/hw/xfree86/common/xf86platformBus.h b/hw/xfree86/common/xf86platformBus.h index 823a10c2e..2a901046d 100644 --- a/hw/xfree86/common/xf86platformBus.h +++ b/hw/xfree86/common/xf86platformBus.h @@ -71,6 +71,77 @@ xf86_platform_odev_attributes(int 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; + } +} + +#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; + } +} + +#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 + extern _X_EXPORT Bool xf86PlatformDeviceCheckBusID(struct xf86_platform_device *device, const char *busid); |