[PATCH v6] drm/xe/uc: Disable GuC communication on hardware initialization error.

[Zhanjun Dong <zhanjun.dong@intel.com>]

Disable GuC communication on Xe micro controller hardware initialization
error.

Signed-off-by: Zhanjun Dong <zhanjun.dong@intel.com>
Reviewed-by: Jonathan Cavitt <jonathan.cavitt@intel.com>
Closes: https://gitlab.freedesktop.org/drm/xe/kernel/-/issues/4917

---
Cc: Michal Wajdeczko <michal.wajdeczko@intel.com>
Cc: Stuart Summers <stuart.summers@intel.com>
Cc: Jonathan Cavitt <jonathan.cavitt@intel.com>

Change list:
v6: Skip disable ct on xe_guc_enable_communication error
v5: Set wedge is excessive action, revert back to disable ct
v4: Fix typo and add new line
v3: v2 CI re-run
v2: Remove unnecessary jump to err-out
    Drop disable ct, switch to set wedge
---
 drivers/gpu/drm/xe/xe_guc.c |  5 +++++
 drivers/gpu/drm/xe/xe_guc.h |  1 +
 drivers/gpu/drm/xe/xe_uc.c  | 19 ++++++++++++++-----
 3 files changed, 20 insertions(+), 5 deletions(-)

diff --git a/drivers/gpu/drm/xe/xe_guc.c b/drivers/gpu/drm/xe/xe_guc.c
index 209e5d53c290..9d7175b16cc7 100644
--- a/drivers/gpu/drm/xe/xe_guc.c
+++ b/drivers/gpu/drm/xe/xe_guc.c
@@ -1230,6 +1230,11 @@ int xe_guc_enable_communication(struct xe_guc *guc)
 	return 0;
 }
 
+void xe_guc_disable_communication(struct xe_guc *guc)
+{
+	xe_guc_ct_disable(&guc->ct);
+}
+
 int xe_guc_suspend(struct xe_guc *guc)
 {
 	struct xe_gt *gt = guc_to_gt(guc);
diff --git a/drivers/gpu/drm/xe/xe_guc.h b/drivers/gpu/drm/xe/xe_guc.h
index 58338be44558..285c19929f8c 100644
--- a/drivers/gpu/drm/xe/xe_guc.h
+++ b/drivers/gpu/drm/xe/xe_guc.h
@@ -33,6 +33,7 @@ int xe_guc_reset(struct xe_guc *guc);
 int xe_guc_upload(struct xe_guc *guc);
 int xe_guc_min_load_for_hwconfig(struct xe_guc *guc);
 int xe_guc_enable_communication(struct xe_guc *guc);
+void xe_guc_disable_communication(struct xe_guc *guc);
 int xe_guc_suspend(struct xe_guc *guc);
 void xe_guc_notify(struct xe_guc *guc);
 int xe_guc_auth_huc(struct xe_guc *guc, u32 rsa_addr);
diff --git a/drivers/gpu/drm/xe/xe_uc.c b/drivers/gpu/drm/xe/xe_uc.c
index 3a8751a8b92d..d74bfc7a85d1 100644
--- a/drivers/gpu/drm/xe/xe_uc.c
+++ b/drivers/gpu/drm/xe/xe_uc.c
@@ -13,6 +13,7 @@
 #include "xe_gt_printk.h"
 #include "xe_gt_sriov_vf.h"
 #include "xe_guc.h"
+#include "xe_guc_ct.h"
 #include "xe_guc_pc.h"
 #include "xe_guc_engine_activity.h"
 #include "xe_huc.h"
@@ -161,15 +162,19 @@ static int vf_uc_init_hw(struct xe_uc *uc)
 
 	err = xe_gt_sriov_vf_connect(uc_to_gt(uc));
 	if (err)
-		return err;
+		goto err_out;
 
 	uc->guc.submission_state.enabled = true;
 
 	err = xe_gt_record_default_lrcs(uc_to_gt(uc));
 	if (err)
-		return err;
+		goto err_out;
 
 	return 0;
+
+err_out:
+	xe_guc_disable_communication(&uc->guc);
+	return err;
 }
 
 /*
@@ -201,15 +206,15 @@ int xe_uc_init_hw(struct xe_uc *uc)
 
 	ret = xe_gt_record_default_lrcs(uc_to_gt(uc));
 	if (ret)
-		return ret;
+		goto err_out;
 
 	ret = xe_guc_post_load_init(&uc->guc);
 	if (ret)
-		return ret;
+		goto err_out;
 
 	ret = xe_guc_pc_start(&uc->guc.pc);
 	if (ret)
-		return ret;
+		goto err_out;
 
 	xe_guc_engine_activity_enable_stats(&uc->guc);
 
@@ -221,6 +226,10 @@ int xe_uc_init_hw(struct xe_uc *uc)
 	xe_gsc_load_start(&uc->gsc);
 
 	return 0;
+
+err_out:
+	xe_guc_disable_communication(&uc->guc);
+	return ret;
 }
 
 int xe_uc_fini_hw(struct xe_uc *uc)
-- 
2.34.1