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loader: add a libdrm case for loader_get_device_name_for_fd

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Use dev_node_from_fd() with HAVE_LIBDRM to provide an implmentation
of loader_get_device_name_for_fd() for non-linux systems that
use libdrm but don't have udev or sysfs.

Signed-off-by: Jonathan Gray <jsg@jsg.id.au>
Reviewed-by: Emil Velikov <emil.velikov@collabora.com>
This commit is contained in:
Jonathan Gray
2015-12-21 16:39:55 +11:00
committed by Emil Velikov
parent 5d09394fb1
commit 28e3ae344b
1 changed files with 25 additions and 1 deletions
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26
src/loader/loader.c
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@@ -445,7 +445,7 @@ int loader_get_user_preferred_fd(int default_fd, int *different_device)
}
#endif
#if defined(HAVE_SYSFS)
#if defined(HAVE_SYSFS) || defined(HAVE_LIBDRM)
static int
dev_node_from_fd(int fd, unsigned int *maj, unsigned int *min)
{
@@ -466,7 +466,9 @@ dev_node_from_fd(int fd, unsigned int *maj, unsigned int *min)
return 0;
}
#endif
#if defined(HAVE_SYSFS)
static int
sysfs_get_pci_id_for_fd(int fd, int *vendor_id, int *chip_id)
{
@@ -671,6 +673,24 @@ sysfs_get_device_name_for_fd(int fd)
}
#endif
#if defined(HAVE_LIBDRM)
static char *
drm_get_device_name_for_fd(int fd)
{
unsigned int maj, min;
char buf[0x40];
int n;
if (dev_node_from_fd(fd, &maj, &min) < 0)
return NULL;
n = snprintf(buf, sizeof(buf), DRM_DEV_NAME, DRM_DIR_NAME, min);
if (n == -1 || n >= sizeof(buf))
return NULL;
return strdup(buf);
}
#endif
char *
loader_get_device_name_for_fd(int fd)
@@ -684,6 +704,10 @@ loader_get_device_name_for_fd(int fd)
#if HAVE_SYSFS
if ((result = sysfs_get_device_name_for_fd(fd)))
return result;
#endif
#if HAVE_LIBDRM
if ((result = drm_get_device_name_for_fd(fd)))
return result;
#endif
return result;
}