mirror of
https://github.com/AuxXxilium/linux_dsm_epyc7002.git
synced 2024-12-22 23:02:27 +07:00
1a49f537c5
In response for I915_PARAM_HAS_HUC we are returning value that indicates if HuC firmware was loaded and verified. However, our previously used positive value was based on specific register bit which is about to change on future platform. Let's normalize our return values to 0 and 1 before clients will start to use Gen9 value. v2: use bool for implicit conversion (Chris) Signed-off-by: Michal Wajdeczko <michal.wajdeczko@intel.com> Cc: Michal Winiarski <michal.winiarski@intel.com> Cc: Joonas Lahtinen <joonas.lahtinen@linux.intel.com> Cc: Haihao Xiang <haihao.xiang@intel.com> Reviewed-by: Michał Winiarski <michal.winiarski@intel.com> #1 Cc: Chris Wilson <chris@chris-wilson.co.uk> Signed-off-by: Chris Wilson <chris@chris-wilson.co.uk> Link: https://patchwork.freedesktop.org/patch/msgid/20181017195245.39644-1-michal.wajdeczko@intel.com
129 lines
3.6 KiB
C
129 lines
3.6 KiB
C
/*
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* Copyright © 2016-2017 Intel Corporation
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*
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* Permission is hereby granted, free of charge, to any person obtaining a
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* copy of this software and associated documentation files (the "Software"),
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* to deal in the Software without restriction, including without limitation
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* the rights to use, copy, modify, merge, publish, distribute, sublicense,
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* and/or sell copies of the Software, and to permit persons to whom the
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* Software is furnished to do so, subject to the following conditions:
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*
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* The above copyright notice and this permission notice (including the next
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* paragraph) shall be included in all copies or substantial portions of the
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* Software.
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*
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* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
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* IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
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* FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
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* THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
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* LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
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* FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS
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* IN THE SOFTWARE.
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*
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*/
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#include <linux/types.h>
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#include "intel_huc.h"
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#include "i915_drv.h"
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void intel_huc_init_early(struct intel_huc *huc)
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{
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intel_huc_fw_init_early(huc);
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}
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int intel_huc_init_misc(struct intel_huc *huc)
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{
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struct drm_i915_private *i915 = huc_to_i915(huc);
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intel_uc_fw_fetch(i915, &huc->fw);
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return 0;
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}
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/**
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* intel_huc_auth() - Authenticate HuC uCode
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* @huc: intel_huc structure
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*
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* Called after HuC and GuC firmware loading during intel_uc_init_hw().
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*
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* This function pins HuC firmware image object into GGTT.
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* Then it invokes GuC action to authenticate passing the offset to RSA
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* signature through intel_guc_auth_huc(). It then waits for 50ms for
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* firmware verification ACK and unpins the object.
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*/
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int intel_huc_auth(struct intel_huc *huc)
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{
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struct drm_i915_private *i915 = huc_to_i915(huc);
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struct intel_guc *guc = &i915->guc;
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struct i915_vma *vma;
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u32 status;
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int ret;
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if (huc->fw.load_status != INTEL_UC_FIRMWARE_SUCCESS)
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return -ENOEXEC;
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vma = i915_gem_object_ggtt_pin(huc->fw.obj, NULL, 0, 0,
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PIN_OFFSET_BIAS | i915->ggtt.pin_bias);
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if (IS_ERR(vma)) {
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ret = PTR_ERR(vma);
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DRM_ERROR("HuC: Failed to pin huc fw object %d\n", ret);
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goto fail;
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}
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ret = intel_guc_auth_huc(guc,
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intel_guc_ggtt_offset(guc, vma) +
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huc->fw.rsa_offset);
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if (ret) {
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DRM_ERROR("HuC: GuC did not ack Auth request %d\n", ret);
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goto fail_unpin;
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}
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/* Check authentication status, it should be done by now */
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ret = __intel_wait_for_register(i915,
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HUC_STATUS2,
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HUC_FW_VERIFIED,
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HUC_FW_VERIFIED,
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2, 50, &status);
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if (ret) {
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DRM_ERROR("HuC: Firmware not verified %#x\n", status);
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goto fail_unpin;
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}
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i915_vma_unpin(vma);
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return 0;
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fail_unpin:
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i915_vma_unpin(vma);
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fail:
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huc->fw.load_status = INTEL_UC_FIRMWARE_FAIL;
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DRM_ERROR("HuC: Authentication failed %d\n", ret);
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return ret;
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}
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/**
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* intel_huc_check_status() - check HuC status
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* @huc: intel_huc structure
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*
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* This function reads status register to verify if HuC
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* firmware was successfully loaded.
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*
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* Returns: 1 if HuC firmware is loaded and verified,
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* 0 if HuC firmware is not loaded and -ENODEV if HuC
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* is not present on this platform.
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*/
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int intel_huc_check_status(struct intel_huc *huc)
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{
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struct drm_i915_private *dev_priv = huc_to_i915(huc);
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bool status;
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if (!HAS_HUC(dev_priv))
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return -ENODEV;
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intel_runtime_pm_get(dev_priv);
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status = I915_READ(HUC_STATUS2) & HUC_FW_VERIFIED;
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intel_runtime_pm_put(dev_priv);
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return status;
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}
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