1 // SPDX-License-Identifier: MIT
2 /*
3  * Copyright © 2014-2019 Intel Corporation
4  */
5 
6 #include "gt/intel_gsc.h"
7 #include "gt/intel_gt.h"
8 #include "intel_huc.h"
9 #include "intel_huc_fw.h"
10 #include "i915_drv.h"
11 #include "pxp/intel_pxp_huc.h"
12 
intel_huc_fw_load_and_auth_via_gsc(struct intel_huc * huc)13 int intel_huc_fw_load_and_auth_via_gsc(struct intel_huc *huc)
14 {
15 	int ret;
16 
17 	if (!intel_huc_is_loaded_by_gsc(huc))
18 		return -ENODEV;
19 
20 	if (!intel_uc_fw_is_loadable(&huc->fw))
21 		return -ENOEXEC;
22 
23 	/*
24 	 * If we abort a suspend, HuC might still be loaded when the mei
25 	 * component gets re-bound and this function called again. If so, just
26 	 * mark the HuC as loaded.
27 	 */
28 	if (intel_huc_is_authenticated(huc)) {
29 		intel_uc_fw_change_status(&huc->fw, INTEL_UC_FIRMWARE_RUNNING);
30 		return 0;
31 	}
32 
33 	GEM_WARN_ON(intel_uc_fw_is_loaded(&huc->fw));
34 
35 	ret = intel_pxp_huc_load_and_auth(huc_to_gt(huc)->i915->pxp);
36 	if (ret)
37 		return ret;
38 
39 	intel_uc_fw_change_status(&huc->fw, INTEL_UC_FIRMWARE_TRANSFERRED);
40 
41 	return intel_huc_wait_for_auth_complete(huc);
42 }
43 
44 /**
45  * intel_huc_fw_upload() - load HuC uCode to device via DMA transfer
46  * @huc: intel_huc structure
47  *
48  * Called from intel_uc_init_hw() during driver load, resume from sleep and
49  * after a GPU reset. Note that HuC must be loaded before GuC.
50  *
51  * The firmware image should have already been fetched into memory, so only
52  * check that fetch succeeded, and then transfer the image to the h/w.
53  *
54  * Return:	non-zero code on error
55  */
intel_huc_fw_upload(struct intel_huc * huc)56 int intel_huc_fw_upload(struct intel_huc *huc)
57 {
58 	if (intel_huc_is_loaded_by_gsc(huc))
59 		return -ENODEV;
60 
61 	/* HW doesn't look at destination address for HuC, so set it to 0 */
62 	return intel_uc_fw_upload(&huc->fw, 0, HUC_UKERNEL);
63 }
64