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25 #include <linux/types.h>
27 #include "intel_huc.h"
30 void intel_huc_init_early(struct intel_huc *huc)
32 intel_huc_fw_init_early(huc);
36 * intel_huc_auth() - Authenticate HuC uCode
37 * @huc: intel_huc structure
39 * Called after HuC and GuC firmware loading during intel_uc_init_hw().
41 * This function pins HuC firmware image object into GGTT.
42 * Then it invokes GuC action to authenticate passing the offset to RSA
43 * signature through intel_guc_auth_huc(). It then waits for 50ms for
44 * firmware verification ACK and unpins the object.
46 int intel_huc_auth(struct intel_huc *huc)
48 struct drm_i915_private *i915 = huc_to_i915(huc);
49 struct intel_guc *guc = &i915->guc;
54 if (huc->fw.load_status != INTEL_UC_FIRMWARE_SUCCESS)
57 vma = i915_gem_object_ggtt_pin(huc->fw.obj, NULL, 0, 0,
58 PIN_OFFSET_BIAS | guc->ggtt_pin_bias);
61 DRM_ERROR("HuC: Failed to pin huc fw object %d\n", ret);
65 ret = intel_guc_auth_huc(guc,
66 intel_guc_ggtt_offset(guc, vma) +
69 DRM_ERROR("HuC: GuC did not ack Auth request %d\n", ret);
73 /* Check authentication status, it should be done by now */
74 ret = __intel_wait_for_register(i915,
80 DRM_ERROR("HuC: Firmware not verified %#x\n", status);
90 huc->fw.load_status = INTEL_UC_FIRMWARE_FAIL;
92 DRM_ERROR("HuC: Authentication failed %d\n", ret);
97 * intel_huc_check_status() - check HuC status
98 * @huc: intel_huc structure
100 * This function reads status register to verify if HuC
101 * firmware was successfully loaded.
103 * Returns positive value if HuC firmware is loaded and verified
104 * and -ENODEV if HuC is not present.
106 int intel_huc_check_status(struct intel_huc *huc)
108 struct drm_i915_private *dev_priv = huc_to_i915(huc);
111 if (!HAS_HUC(dev_priv))
114 intel_runtime_pm_get(dev_priv);
115 status = I915_READ(HUC_STATUS2) & HUC_FW_VERIFIED;
116 intel_runtime_pm_put(dev_priv);