[Intel-xe] [PATCH 2/4] drm/xe/guc: Return the lower part of blocking H2G message

[Matthew Brost]

The upper layers may need this data, an example of this is allocating
DIST doorbell.

Signed-off-by: Matthew Brost <matthew.brost at intel.com>
---
 drivers/gpu/drm/xe/xe_guc_ct.c | 6 +++++-
 drivers/gpu/drm/xe/xe_guc_pc.c | 6 ++++--
 drivers/gpu/drm/xe/xe_huc.c    | 2 +-
 3 files changed, 10 insertions(+), 4 deletions(-)

diff --git a/drivers/gpu/drm/xe/xe_guc_ct.c b/drivers/gpu/drm/xe/xe_guc_ct.c
index e5ed9022a0a2..54578a21da47 100644
--- a/drivers/gpu/drm/xe/xe_guc_ct.c
+++ b/drivers/gpu/drm/xe/xe_guc_ct.c
@@ -26,6 +26,7 @@ struct g2h_fence {
 	wait_queue_head_t wq;
 	u32 *response_buffer;
 	u32 seqno;
+	u32 status;
 	u16 response_len;
 	u16 error;
 	u16 hint;
@@ -728,7 +729,7 @@ static int guc_ct_send_recv(struct xe_guc_ct *ct, const u32 *action, u32 len,
 		ret = -EIO;
 	}
 
-	return ret > 0 ? 0 : ret;
+	return ret > 0 ? g2h_fence.status : ret;
 }
 
 int xe_guc_ct_send_recv(struct xe_guc_ct *ct, const u32 *action, u32 len,
@@ -794,6 +795,9 @@ static int parse_g2h_response(struct xe_guc_ct *ct, u32 *msg, u32 len)
 		g2h_fence->response_len = response_len;
 		memcpy(g2h_fence->response_buffer, msg + GUC_CTB_MSG_MIN_LEN,
 		       response_len * sizeof(u32));
+	} else {
+		g2h_fence->status =
+			FIELD_GET(GUC_HXG_RESPONSE_MSG_0_DATA0, msg[1]);
 	}
 
 	g2h_release_space(ct, GUC_CTB_HXG_MSG_MAX_LEN);
diff --git a/drivers/gpu/drm/xe/xe_guc_pc.c b/drivers/gpu/drm/xe/xe_guc_pc.c
index 5a8d827ba770..df080588dd02 100644
--- a/drivers/gpu/drm/xe/xe_guc_pc.c
+++ b/drivers/gpu/drm/xe/xe_guc_pc.c
@@ -204,11 +204,13 @@ static int pc_action_query_task_state(struct xe_guc_pc *pc)
 
 	/* Blocking here to ensure the results are ready before reading them */
 	ret = xe_guc_ct_send_block(ct, action, ARRAY_SIZE(action));
-	if (ret)
+	if (ret < 0) {
 		drm_err(&pc_to_xe(pc)->drm,
 			"GuC PC query task state failed: %pe", ERR_PTR(ret));
+		return ret;
+	}
 
-	return ret;
+	return 0;
 }
 
 static int pc_action_set_param(struct xe_guc_pc *pc, u8 id, u32 value)
diff --git a/drivers/gpu/drm/xe/xe_huc.c b/drivers/gpu/drm/xe/xe_huc.c
index a9448c6f6418..2203d281853a 100644
--- a/drivers/gpu/drm/xe/xe_huc.c
+++ b/drivers/gpu/drm/xe/xe_huc.c
@@ -39,7 +39,7 @@ int xe_huc_init(struct xe_huc *huc)
 
 	huc->fw.type = XE_UC_FW_TYPE_HUC;
 	ret = xe_uc_fw_init(&huc->fw);
-	if (ret)
+	if (ret < 0)
 		goto out;
 
 	xe_uc_fw_change_status(&huc->fw, XE_UC_FIRMWARE_LOADABLE);
-- 
2.34.1