[PATCH v4 12/13] drm/i915/guc: Handle default action received over CT

[Michal Wajdeczko]

When running on platform with CTB based GuC communication enabled,
GuC to Host event data will be delivered as CT request message.
However, content of the data[1] of this CT message follows format
of the scratch register used in MMIO based communication, so some
code reuse is still possible.

Signed-off-by: Michal Wajdeczko <michal.wajdeczko at intel.com>
Cc: Oscar Mateo <oscar.mateo at intel.com>
---
 drivers/gpu/drm/i915/intel_guc.c    | 5 +++++
 drivers/gpu/drm/i915/intel_guc.h    | 1 +
 drivers/gpu/drm/i915/intel_guc_ct.c | 4 ++++
 3 files changed, 10 insertions(+)

diff --git a/drivers/gpu/drm/i915/intel_guc.c b/drivers/gpu/drm/i915/intel_guc.c
index 45b5266..d00038e 100644
--- a/drivers/gpu/drm/i915/intel_guc.c
+++ b/drivers/gpu/drm/i915/intel_guc.c
@@ -412,6 +412,11 @@ void intel_guc_to_host_event_handler_mmio(struct intel_guc *guc)
 	I915_WRITE(SOFT_SCRATCH(15), val & ~msg);
 	spin_unlock(&guc->irq_lock);
 
+	intel_guc_to_host_process_recv_msg(guc, msg);
+}
+
+void intel_guc_to_host_process_recv_msg(struct intel_guc *guc, u32 msg)
+{
 	if (msg & (INTEL_GUC_RECV_MSG_FLUSH_LOG_BUFFER |
 		   INTEL_GUC_RECV_MSG_CRASH_DUMP_POSTED))
 		intel_guc_log_handle_flush_event(&guc->log);
diff --git a/drivers/gpu/drm/i915/intel_guc.h b/drivers/gpu/drm/i915/intel_guc.h
index 6dc109a..f1265e1 100644
--- a/drivers/gpu/drm/i915/intel_guc.h
+++ b/drivers/gpu/drm/i915/intel_guc.h
@@ -163,6 +163,7 @@ int intel_guc_send_mmio(struct intel_guc *guc, const u32 *action, u32 len,
 void intel_guc_to_host_event_handler(struct intel_guc *guc);
 void intel_guc_to_host_event_handler_nop(struct intel_guc *guc);
 void intel_guc_to_host_event_handler_mmio(struct intel_guc *guc);
+void intel_guc_to_host_process_recv_msg(struct intel_guc *guc, u32 msg);
 int intel_guc_sample_forcewake(struct intel_guc *guc);
 int intel_guc_auth_huc(struct intel_guc *guc, u32 rsa_offset);
 int intel_guc_suspend(struct intel_guc *guc);
diff --git a/drivers/gpu/drm/i915/intel_guc_ct.c b/drivers/gpu/drm/i915/intel_guc_ct.c
index 864c861..4d493b8 100644
--- a/drivers/gpu/drm/i915/intel_guc_ct.c
+++ b/drivers/gpu/drm/i915/intel_guc_ct.c
@@ -687,6 +687,7 @@ static int ct_handle_request(struct intel_guc_ct *ct, const u32 *msg)
 
 static bool ct_process_incoming_requests(struct intel_guc_ct *ct)
 {
+	struct intel_guc *guc = ct_to_guc(ct);
 	unsigned long flags;
 	struct ct_incoming_request *request;
 	bool done;
@@ -711,6 +712,9 @@ static bool ct_process_incoming_requests(struct intel_guc_ct *ct)
 	CT_DEBUG_DRIVER("CT: processing request %*phn\n", 4*len, request->data);
 
 	switch (action) {
+	case INTEL_GUC_ACTION_DEFAULT:
+		intel_guc_to_host_process_recv_msg(guc, request->data[1]);
+		break;
 	default:
 		DRM_ERROR("CT: unexpected request %*phn\n",
 			  4*len, request->data);
-- 
1.9.1