Attachment 37281 Details for Bug 25681 – Example of how to check if the driver supports GEM.

[patch] Example of how to check if the driver supports GEM.

gem.c (text/plain), 1.10 KB, created by Chris Wilson on 2010-07-21 13:48:43 UTC

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Creator: Chris Wilson

Created: 2010-07-21 13:48:43 UTC

Size: 1.10 KB

patch

obsolete

>#include <stdio.h>
>#include <unistd.h>
>#include <fcntl.h>
>#include <sys/ioctl.h>
>
>/* Manually recreate these defines to avoid depending upon libdrm-dev */
>#define DRM_IOCTL_BASE			'd'
>#define DRM_IO(nr)			_IO(DRM_IOCTL_BASE,nr)
>#define DRM_IOR(nr,type)		_IOR(DRM_IOCTL_BASE,nr,type)
>#define DRM_IOW(nr,type)		_IOW(DRM_IOCTL_BASE,nr,type)
>#define DRM_IOWR(nr,type)		_IOWR(DRM_IOCTL_BASE,nr,type)
>#define DRM_COMMAND_BASE 0x40
>
>struct intel_getparam {
>	int param;
>	int *value;
>};
>#define I915_PARAM_HAS_GEM 5
>
>#define I915_GET_PARAM 0x6
>#define DRM_IOCTL_I915_GET_PARAM         DRM_IOWR(DRM_COMMAND_BASE + I915_GET_PARAM, struct intel_getparam)
>
>int main(int argc, char **argv)
>{
>	const char *card = "/dev/dri/card0";
>	struct intel_getparam gp;
>	int has_gem = 0;
>	int fd, ret;
>
>	if (argc > 1)
>		card = argv[1];
>
>	fd = open (card, O_RDWR);
>	if (fd < 0) {
>		perror (card);
>		return 1;
>	}
>
>	gp.param = I915_PARAM_HAS_GEM;
>	gp.value = &has_gem;
>	ret = ioctl (fd, DRM_IOCTL_I915_GET_PARAM, &gp);
>	if (ret < 0)
>		perror("GET_PARAM failed");
>	else
>		printf ("%s: GEM %sabled\n", card, has_gem ? "en" : "dis");
>	close (fd);
>	return 0;
>}

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