lib: Open debugfs files for the given DRM device

When opening a DRM debugfs file, locate the right path based on the
given DRM device FD.

This is needed so, in setups with more than one DRM device, any
operations on debugfs files affect the expected DRM device.

v2: - rebased and fixed new API additions

v3: - updated chamelium test, which was missed previously
    - use the minor of the device for the debugfs path, not the major
    - have a proper exit handler for calling igt_hpd_storm_reset with the
      right device fd.

Signed-off-by: Tomeu Vizoso <tomeu.vizoso@collabora.com>
Reviewed-by: Robert Foss <robert.foss@collabora.com>
Acked-by: Chris Wilson <chris@chris-wilson.co.uk>

1 files changed, 2 insertions, 2 deletions

diff --git a/lib/igt_aux.h b/lib/igt_aux.h
index 13f6f156..e62858e6 100644
--- a/lib/igt_aux.h
+++ b/lib/igt_aux.h
@@ -51,7 +51,7 @@ extern int num_trash_bos;
 void igt_fork_signal_helper(void);
 void igt_stop_signal_helper(void);
 
-void igt_fork_shrink_helper(void);
+void igt_fork_shrink_helper(int fd);
 void igt_stop_shrink_helper(void);
 
 void igt_fork_hang_detector(int fd);
@@ -198,7 +198,7 @@ void igt_debug_manual_check(const char *var, const char *expected);
 
 /* These are separate to allow easier testing when porting, see the comment at
  * the bottom of intel_os.c. */
-void intel_purge_vm_caches(void);
+void intel_purge_vm_caches(int fd);
 uint64_t intel_get_avail_ram_mb(void);
 uint64_t intel_get_total_ram_mb(void);
 uint64_t intel_get_total_swap_mb(void);