Aurelien
/
xf86-video-intel
1
0
Fork 0
Code Issues Pull Requests Packages Projects Releases Wiki Activity

intel: Log open clients on master takeover fail 

If we fail to claim the DRM device as master, dump /debugfs/.../clients
so that we can check to see who failed to drop master for us.

Signed-off-by: Chris Wilson <chris@chris-wilson.co.uk>
This commit is contained in:
Chris Wilson 2014-08-09 07:12:23 +01:00
parent 8d135867c8
commit dea65e8be7
1 changed files with 75 additions and 0 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

75
src/intel_device.c
View File

@ -74,6 +74,80 @@ struct intel_device {
static int intel_device_key = -1;
static int dump_file(ScrnInfoPtr scrn, const char *path)
{
FILE *file;
size_t len = 0;
char *line = NULL;
file = fopen(path, "r");
if (file == NULL)
return 0;
xf86DrvMsg(scrn->scrnIndex, X_INFO, "[drm] Contents of '%s':\n", path);
while (getline(&line, &len, file) != -1)
xf86DrvMsg(scrn->scrnIndex, X_INFO, "[drm] %s", line);
free(line);
fclose(file);
return 1;
}
static int __find_debugfs(void)
{
int i;
for (i = 0; i < DRM_MAX_MINOR; i++) {
char path[80];
sprintf(path, "/sys/kernel/debug/dri/%d/i915_wedged", i);
if (access(path, R_OK) == 0)
return i;
sprintf(path, "/debug/dri/%d/i915_wedged", i);
if (access(path, R_OK) == 0)
return i;
}
return -1;
}
static int drm_get_minor(int fd)
{
struct stat st;
if (fstat(fd, &st))
return __find_debugfs();
if (!S_ISCHR(st.st_mode))
return __find_debugfs();
return st.st_rdev & 0x63;
}
static void dump_debugfs(ScrnInfoPtr scrn, int fd, const char *name)
{
char path[80];
int minor;
minor = drm_get_minor(fd);
if (minor < 0)
return;
sprintf(path, "/sys/kernel/debug/dri/%d/%s", minor, name);
if (dump_file(scrn, path))
return;
sprintf(path, "/debug/dri/%d/%s", minor, name);
if (dump_file(scrn, path))
return;
}
static void dump_clients_info(ScrnInfoPtr scrn, int fd)
{
dump_debugfs(scrn, fd, "clients");
}
static int __intel_get_device_id(int fd)
{
struct drm_i915_getparam gp;
@ -572,6 +646,7 @@ int intel_get_device(ScrnInfoPtr scrn)
xf86DrvMsg(scrn->scrnIndex, X_ERROR,
"[drm] failed to set drm interface version: %s [%d].\n",
strerror(errno), errno);
dump_clients_info(scrn, dev->fd);
dev->open_count--;
return -1;
}