[PATCH 05/10] drm/i915: Reorganize HuC authentication

[Sagar Arun Kamble <sagar.a.kamble@intel.com>]

Prepared intel_auth_huc to separate HuC specific functionality
from GuC send action. Created new header intel_huc.h to group
HuC specific declarations.

v2: Changed argument preparation for AUTHENTICATE_HUC.
s/intel_auth_huc/intel_huc_auth. Deferred creation of intel_huc.h
to later patch.

Cc: Michal Wajdeczko <michal.wajdeczko@intel.com>
Cc: Michał Winiarski <michal.winiarski@intel.com>
Signed-off-by: Sagar Arun Kamble <sagar.a.kamble@intel.com>
---
 drivers/gpu/drm/i915/intel_guc.c | 18 ++++++++++++++++++
 drivers/gpu/drm/i915/intel_guc.h |  1 +
 drivers/gpu/drm/i915/intel_huc.c | 21 ++++++---------------
 drivers/gpu/drm/i915/intel_uc.c  |  2 +-
 drivers/gpu/drm/i915/intel_uc.h  |  2 +-
 5 files changed, 27 insertions(+), 17 deletions(-)

diff --git a/drivers/gpu/drm/i915/intel_guc.c b/drivers/gpu/drm/i915/intel_guc.c
index 0767ec2..b250f39 100644
--- a/drivers/gpu/drm/i915/intel_guc.c
+++ b/drivers/gpu/drm/i915/intel_guc.c
@@ -145,3 +145,21 @@ int intel_guc_sample_forcewake(struct intel_guc *guc)
 
 	return intel_guc_send(guc, action, ARRAY_SIZE(action));
 }
+
+/**
+ * intel_guc_auth_huc() - authenticate ucode
+ * @guc: struct intel_guc*
+ * @offset: rsa offset w.r.t GGTT base of huc vma
+ *
+ * Triggers a HuC fw authentication request to the GuC via intel_guc_send
+ * AUTHENTICATE_HUC interface.
+ */
+int intel_guc_auth_huc(struct intel_guc *guc, u32 rsa_offset)
+{
+	u32 action[] = {
+		INTEL_GUC_ACTION_AUTHENTICATE_HUC,
+		rsa_offset
+	};
+
+	return intel_guc_send(guc, action, ARRAY_SIZE(action));
+}
diff --git a/drivers/gpu/drm/i915/intel_guc.h b/drivers/gpu/drm/i915/intel_guc.h
index 919b6e1..e7b9a8b 100644
--- a/drivers/gpu/drm/i915/intel_guc.h
+++ b/drivers/gpu/drm/i915/intel_guc.h
@@ -147,6 +147,7 @@ static inline u32 guc_ggtt_offset(struct i915_vma *vma)
 void intel_guc_init_send_regs(struct intel_guc *guc);
 int intel_guc_send_mmio(struct intel_guc *guc, const u32 *action, u32 len);
 int intel_guc_sample_forcewake(struct intel_guc *guc);
+int intel_guc_auth_huc(struct intel_guc *guc, u32 rsa_offset);
 
 /* intel_guc_loader.c */
 int intel_guc_select_fw(struct intel_guc *guc);
diff --git a/drivers/gpu/drm/i915/intel_huc.c b/drivers/gpu/drm/i915/intel_huc.c
index b81c6af..6ecf344 100644
--- a/drivers/gpu/drm/i915/intel_huc.c
+++ b/drivers/gpu/drm/i915/intel_huc.c
@@ -226,19 +226,15 @@ void intel_huc_init_hw(struct intel_huc *huc)
 }
 
 /**
- * intel_guc_auth_huc() - authenticate ucode
- * @dev_priv: the drm_i915_device
- *
- * Triggers a HuC fw authentication request to the GuC via intel_guc_action_
- * authenticate_huc interface.
+ * intel_huc_auth() - authenticate ucode
  */
-void intel_guc_auth_huc(struct drm_i915_private *dev_priv)
+void intel_huc_auth(struct intel_huc *huc)
 {
+	struct drm_i915_private *dev_priv = huc_to_i915(huc);
 	struct intel_guc *guc = &dev_priv->guc;
-	struct intel_huc *huc = &dev_priv->huc;
 	struct i915_vma *vma;
+	u32 offset;
 	int ret;
-	u32 data[2];
 
 	if (huc->fw.load_status != INTEL_UC_FIRMWARE_SUCCESS)
 		return;
@@ -251,11 +247,8 @@ void intel_guc_auth_huc(struct drm_i915_private *dev_priv)
 		return;
 	}
 
-	/* Specify auth action and where public signature is. */
-	data[0] = INTEL_GUC_ACTION_AUTHENTICATE_HUC;
-	data[1] = guc_ggtt_offset(vma) + huc->fw.rsa_offset;
-
-	ret = intel_guc_send(guc, data, ARRAY_SIZE(data));
+	offset = guc_ggtt_offset(vma) + huc->fw.rsa_offset;
+	ret = intel_guc_auth_huc(guc, offset);
 	if (ret) {
 		DRM_ERROR("HuC: GuC did not ack Auth request %d\n", ret);
 		goto out;
@@ -267,7 +260,6 @@ void intel_guc_auth_huc(struct drm_i915_private *dev_priv)
 				HUC_FW_VERIFIED,
 				HUC_FW_VERIFIED,
 				50);
-
 	if (ret) {
 		DRM_ERROR("HuC: Authentication failed %d\n", ret);
 		goto out;
@@ -276,4 +268,3 @@ void intel_guc_auth_huc(struct drm_i915_private *dev_priv)
 out:
 	i915_vma_unpin(vma);
 }
-
diff --git a/drivers/gpu/drm/i915/intel_uc.c b/drivers/gpu/drm/i915/intel_uc.c
index 4f8f0ff..9a0006a 100644
--- a/drivers/gpu/drm/i915/intel_uc.c
+++ b/drivers/gpu/drm/i915/intel_uc.c
@@ -352,7 +352,7 @@ int intel_uc_init_hw(struct drm_i915_private *dev_priv)
 	if (ret)
 		goto err_log_capture;
 
-	intel_guc_auth_huc(dev_priv);
+	intel_huc_auth(&dev_priv->huc);
 	if (i915.enable_guc_submission) {
 		if (i915.guc_log_level >= 0)
 			gen9_enable_guc_interrupts(dev_priv);
diff --git a/drivers/gpu/drm/i915/intel_uc.h b/drivers/gpu/drm/i915/intel_uc.h
index 30902f3..aad0b1c 100644
--- a/drivers/gpu/drm/i915/intel_uc.h
+++ b/drivers/gpu/drm/i915/intel_uc.h
@@ -116,6 +116,6 @@ struct intel_huc {
 /* intel_huc.c */
 void intel_huc_select_fw(struct intel_huc *huc);
 void intel_huc_init_hw(struct intel_huc *huc);
-void intel_guc_auth_huc(struct drm_i915_private *dev_priv);
+void intel_huc_auth(struct intel_huc *huc);
 
 #endif
-- 
1.9.1

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