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1// SPDX-License-Identifier: MIT2/*3 * Copyright(c) 2021-2022, Intel Corporation. All rights reserved.4 */5 6#include "i915_drv.h"7 8#include "gem/i915_gem_region.h"9#include "gt/intel_gt.h"10 11#include "intel_pxp.h"12#include "intel_pxp_huc.h"13#include "intel_pxp_tee.h"14#include "intel_pxp_types.h"15#include "intel_pxp_cmd_interface_43.h"16 17int intel_pxp_huc_load_and_auth(struct intel_pxp *pxp)18{19 struct intel_gt *gt;20 struct intel_huc *huc;21 struct pxp43_start_huc_auth_in huc_in = {};22 struct pxp43_huc_auth_out huc_out = {};23 dma_addr_t huc_phys_addr;24 u8 client_id = 0;25 u8 fence_id = 0;26 int err;27 28 if (!pxp || !pxp->pxp_component)29 return -ENODEV;30 31 gt = pxp->ctrl_gt;32 huc = >->uc.huc;33 34 huc_phys_addr = i915_gem_object_get_dma_address(huc->fw.obj, 0);35 36 /* write the PXP message into the lmem (the sg list) */37 huc_in.header.api_version = PXP_APIVER(4, 3);38 huc_in.header.command_id = PXP43_CMDID_START_HUC_AUTH;39 huc_in.header.status = 0;40 huc_in.header.buffer_len = sizeof(huc_in.huc_base_address);41 huc_in.huc_base_address = cpu_to_le64(huc_phys_addr);42 43 err = intel_pxp_tee_stream_message(pxp, client_id, fence_id,44 &huc_in, sizeof(huc_in),45 &huc_out, sizeof(huc_out));46 if (err < 0) {47 drm_err(>->i915->drm,48 "Failed to send HuC load and auth command to GSC [%d]!\n",49 err);50 return err;51 }52 53 /*54 * HuC does sometimes survive suspend/resume (it depends on how "deep"55 * a sleep state the device reaches) so we can end up here on resume56 * with HuC already loaded, in which case the GSC will return57 * PXP_STATUS_OP_NOT_PERMITTED. We can therefore consider the GuC58 * correctly transferred in this scenario; if the same error is ever59 * returned with HuC not loaded we'll still catch it when we check the60 * authentication bit later.61 */62 if (huc_out.header.status != PXP_STATUS_SUCCESS &&63 huc_out.header.status != PXP_STATUS_OP_NOT_PERMITTED) {64 drm_err(>->i915->drm,65 "HuC load failed with GSC error = 0x%x\n",66 huc_out.header.status);67 return -EPROTO;68 }69 70 return 0;71}72