72 lines
2.0 KiB
C
72 lines
2.0 KiB
C
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// SPDX-License-Identifier: MIT
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/*
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* Copyright(c) 2021-2022, Intel Corporation. All rights reserved.
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*/
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#include "i915_drv.h"
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#include "gem/i915_gem_region.h"
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#include "gt/intel_gt.h"
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#include "intel_pxp.h"
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#include "intel_pxp_huc.h"
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#include "intel_pxp_tee.h"
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#include "intel_pxp_types.h"
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#include "intel_pxp_cmd_interface_43.h"
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int intel_pxp_huc_load_and_auth(struct intel_pxp *pxp)
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{
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struct intel_gt *gt;
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struct intel_huc *huc;
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struct pxp43_start_huc_auth_in huc_in = {0};
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struct pxp43_start_huc_auth_out huc_out = {0};
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dma_addr_t huc_phys_addr;
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u8 client_id = 0;
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u8 fence_id = 0;
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int err;
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if (!pxp || !pxp->pxp_component)
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return -ENODEV;
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gt = pxp->ctrl_gt;
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huc = >->uc.huc;
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huc_phys_addr = i915_gem_object_get_dma_address(huc->fw.obj, 0);
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/* write the PXP message into the lmem (the sg list) */
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huc_in.header.api_version = PXP_APIVER(4, 3);
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huc_in.header.command_id = PXP43_CMDID_START_HUC_AUTH;
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huc_in.header.status = 0;
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huc_in.header.buffer_len = sizeof(huc_in.huc_base_address);
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huc_in.huc_base_address = huc_phys_addr;
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err = intel_pxp_tee_stream_message(pxp, client_id, fence_id,
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&huc_in, sizeof(huc_in),
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&huc_out, sizeof(huc_out));
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if (err < 0) {
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drm_err(>->i915->drm,
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"Failed to send HuC load and auth command to GSC [%d]!\n",
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err);
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return err;
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}
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/*
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* HuC does sometimes survive suspend/resume (it depends on how "deep"
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* a sleep state the device reaches) so we can end up here on resume
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* with HuC already loaded, in which case the GSC will return
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* PXP_STATUS_OP_NOT_PERMITTED. We can therefore consider the GuC
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* correctly transferred in this scenario; if the same error is ever
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* returned with HuC not loaded we'll still catch it when we check the
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* authentication bit later.
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*/
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if (huc_out.header.status != PXP_STATUS_SUCCESS &&
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huc_out.header.status != PXP_STATUS_OP_NOT_PERMITTED) {
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drm_err(>->i915->drm,
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"HuC load failed with GSC error = 0x%x\n",
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huc_out.header.status);
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return -EPROTO;
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}
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return 0;
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}
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