[PATCH i-g-t 2/2] lib/igt_kmod: Add IGT_HOOK_POST_GPUKMOD_UNBIND

[Peter Senna Tschudin]

Adds an igt_hook after the unbind operation of the GPU kmod intended as
a strategice entry point for kmemleak scans.

Can be used with --hook  'post-gpukmod-unbind:...'

Cc: Gustavo Souza <gustavo.souza at linux.intel.com>
Signed-off-by: Peter Senna Tschudin <peter.senna at linux.intel.com>
---
 lib/igt_hook.c | 5 +++++
 lib/igt_hook.h | 1 +
 lib/igt_kmod.c | 7 +++++++
 3 files changed, 13 insertions(+)

diff --git a/lib/igt_hook.c b/lib/igt_hook.c
index 8932d118d..a3f92acd4 100644
--- a/lib/igt_hook.c
+++ b/lib/igt_hook.c
@@ -74,6 +74,8 @@ static const char *igt_hook_evt_type_to_name(enum igt_hook_evt_type evt_type)
 		return "post-subtest";
 	case IGT_HOOK_POST_TEST:
 		return "post-test";
+	case IGT_HOOK_POST_GPUKMOD_UNBIND:
+		return "post-gpukmod-unbind";
 	case IGT_HOOK_NUM_EVENTS:
 		break;
 	/* No "default:" case, to force a warning from -Wswitch in case we miss
@@ -470,6 +472,9 @@ below:\n\
 		case IGT_HOOK_POST_TEST:
 			desc = "Occurs after a test case has finished.";
 			break;
+		case IGT_HOOK_POST_GPUKMOD_UNBIND:
+			desc = "Occurs after the GPU kernel module is unbound from the device.";
+			break;
 		default:
 			desc = "MISSING DESCRIPTION";
 		}
diff --git a/lib/igt_hook.h b/lib/igt_hook.h
index e9f97b79b..92d3986e8 100644
--- a/lib/igt_hook.h
+++ b/lib/igt_hook.h
@@ -39,6 +39,7 @@ enum igt_hook_evt_type {
 	IGT_HOOK_POST_DYN_SUBTEST,
 	IGT_HOOK_POST_SUBTEST,
 	IGT_HOOK_POST_TEST,
+	IGT_HOOK_POST_GPUKMOD_UNBIND,
 	IGT_HOOK_NUM_EVENTS /* This must always be the last one. */
 };
 
diff --git a/lib/igt_kmod.c b/lib/igt_kmod.c
index 6d7f5705c..e300b743a 100644
--- a/lib/igt_kmod.c
+++ b/lib/igt_kmod.c
@@ -41,6 +41,7 @@
 #include "igt_aux.h"
 #include "igt_core.h"
 #include "igt_debugfs.h"
+#include "igt_hook.h"
 #include "igt_kmod.h"
 #include "igt_ktap.h"
 #include "igt_sysfs.h"
@@ -604,6 +605,7 @@ int __igt_intel_driver_unload(char **who, const char *driver)
  */
 int igt_kmod_unbind(const char *mod_name, const char *pci_device)
 {
+	struct igt_hook *igt_hook = NULL;
 	char path[PATH_MAX];
 	struct dirent *de;
 	int dirlen;
@@ -633,6 +635,11 @@ int igt_kmod_unbind(const char *mod_name, const char *pci_device)
 	}
 
 	closedir(dir);
+	igt_hook = igt_hook_get_pointer();
+	igt_hook_event_notify(igt_hook, &(struct igt_hook_evt){
+		.evt_type = IGT_HOOK_POST_GPUKMOD_UNBIND,
+		.target_name = mod_name,
+	});
 
 	return 0;
 }
-- 
2.43.0