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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);
35 int intel_huc_init_misc(struct intel_huc *huc)
37 struct drm_i915_private *i915 = huc_to_i915(huc);
39 intel_uc_fw_fetch(i915, &huc->fw);
43 static int intel_huc_rsa_data_create(struct intel_huc *huc)
45 struct drm_i915_private *i915 = huc_to_i915(huc);
46 struct intel_guc *guc = &i915->guc;
51 * HuC firmware will sit above GUC_GGTT_TOP and will not map
52 * through GTT. Unfortunately, this means GuC cannot perform
53 * the HuC auth. as the rsa offset now falls within the GuC
54 * inaccessible range. We resort to perma-pinning an additional
55 * vma within the accessible range that only contains the rsa
56 * signature. The GuC can use this extra pinning to perform
57 * the authentication since its GGTT offset will be GuC
60 vma = intel_guc_allocate_vma(guc, PAGE_SIZE);
64 vaddr = i915_gem_object_pin_map(vma->obj, I915_MAP_WB);
66 i915_vma_unpin_and_release(&vma, 0);
67 return PTR_ERR(vaddr);
71 huc->rsa_data_vaddr = vaddr;
76 static void intel_huc_rsa_data_destroy(struct intel_huc *huc)
78 i915_vma_unpin_and_release(&huc->rsa_data, I915_VMA_RELEASE_MAP);
81 int intel_huc_init(struct intel_huc *huc)
85 err = intel_huc_rsa_data_create(huc);
89 return intel_uc_fw_init(&huc->fw);
92 void intel_huc_fini(struct intel_huc *huc)
94 intel_uc_fw_fini(&huc->fw);
95 intel_huc_rsa_data_destroy(huc);
99 * intel_huc_auth() - Authenticate HuC uCode
100 * @huc: intel_huc structure
102 * Called after HuC and GuC firmware loading during intel_uc_init_hw().
104 * This function pins HuC firmware image object into GGTT.
105 * Then it invokes GuC action to authenticate passing the offset to RSA
106 * signature through intel_guc_auth_huc(). It then waits for 50ms for
107 * firmware verification ACK and unpins the object.
109 int intel_huc_auth(struct intel_huc *huc)
111 struct drm_i915_private *i915 = huc_to_i915(huc);
112 struct intel_guc *guc = &i915->guc;
116 if (huc->fw.load_status != INTEL_UC_FIRMWARE_SUCCESS)
119 ret = intel_guc_auth_huc(guc,
120 intel_guc_ggtt_offset(guc, huc->rsa_data));
122 DRM_ERROR("HuC: GuC did not ack Auth request %d\n", ret);
126 /* Check authentication status, it should be done by now */
127 ret = __intel_wait_for_register(&i915->uncore,
133 DRM_ERROR("HuC: Firmware not verified %#x\n", status);
140 huc->fw.load_status = INTEL_UC_FIRMWARE_FAIL;
142 DRM_ERROR("HuC: Authentication failed %d\n", ret);
147 * intel_huc_check_status() - check HuC status
148 * @huc: intel_huc structure
150 * This function reads status register to verify if HuC
151 * firmware was successfully loaded.
153 * Returns: 1 if HuC firmware is loaded and verified,
154 * 0 if HuC firmware is not loaded and -ENODEV if HuC
155 * is not present on this platform.
157 int intel_huc_check_status(struct intel_huc *huc)
159 struct drm_i915_private *dev_priv = huc_to_i915(huc);
160 intel_wakeref_t wakeref;
163 if (!HAS_HUC(dev_priv))
166 with_intel_runtime_pm(dev_priv, wakeref)
167 status = I915_READ(HUC_STATUS2) & HUC_FW_VERIFIED;