128 lines
3.5 KiB
C
Executable file
128 lines
3.5 KiB
C
Executable file
/*
|
|
* Copyright © 2016-2017 Intel Corporation
|
|
*
|
|
* Permission is hereby granted, free of charge, to any person obtaining a
|
|
* copy of this software and associated documentation files (the "Software"),
|
|
* to deal in the Software without restriction, including without limitation
|
|
* the rights to use, copy, modify, merge, publish, distribute, sublicense,
|
|
* and/or sell copies of the Software, and to permit persons to whom the
|
|
* Software is furnished to do so, subject to the following conditions:
|
|
*
|
|
* The above copyright notice and this permission notice (including the next
|
|
* paragraph) shall be included in all copies or substantial portions of the
|
|
* Software.
|
|
*
|
|
* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
|
|
* IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
|
|
* FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
|
|
* THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
|
|
* LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
|
|
* FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS
|
|
* IN THE SOFTWARE.
|
|
*
|
|
*/
|
|
|
|
#include <linux/types.h>
|
|
|
|
#include "intel_huc.h"
|
|
#include "i915_drv.h"
|
|
|
|
void intel_huc_init_early(struct intel_huc *huc)
|
|
{
|
|
intel_huc_fw_init_early(huc);
|
|
}
|
|
|
|
int intel_huc_init_misc(struct intel_huc *huc)
|
|
{
|
|
struct drm_i915_private *i915 = huc_to_i915(huc);
|
|
|
|
intel_uc_fw_fetch(i915, &huc->fw);
|
|
return 0;
|
|
}
|
|
|
|
/**
|
|
* intel_huc_auth() - Authenticate HuC uCode
|
|
* @huc: intel_huc structure
|
|
*
|
|
* Called after HuC and GuC firmware loading during intel_uc_init_hw().
|
|
*
|
|
* This function pins HuC firmware image object into GGTT.
|
|
* Then it invokes GuC action to authenticate passing the offset to RSA
|
|
* signature through intel_guc_auth_huc(). It then waits for 50ms for
|
|
* firmware verification ACK and unpins the object.
|
|
*/
|
|
int intel_huc_auth(struct intel_huc *huc)
|
|
{
|
|
struct drm_i915_private *i915 = huc_to_i915(huc);
|
|
struct intel_guc *guc = &i915->guc;
|
|
struct i915_vma *vma;
|
|
u32 status;
|
|
int ret;
|
|
|
|
if (huc->fw.load_status != INTEL_UC_FIRMWARE_SUCCESS)
|
|
return -ENOEXEC;
|
|
|
|
vma = i915_gem_object_ggtt_pin(huc->fw.obj, NULL, 0, 0,
|
|
PIN_OFFSET_BIAS | guc->ggtt_pin_bias);
|
|
if (IS_ERR(vma)) {
|
|
ret = PTR_ERR(vma);
|
|
DRM_ERROR("HuC: Failed to pin huc fw object %d\n", ret);
|
|
goto fail;
|
|
}
|
|
|
|
ret = intel_guc_auth_huc(guc,
|
|
intel_guc_ggtt_offset(guc, vma) +
|
|
huc->fw.rsa_offset);
|
|
if (ret) {
|
|
DRM_ERROR("HuC: GuC did not ack Auth request %d\n", ret);
|
|
goto fail_unpin;
|
|
}
|
|
|
|
/* Check authentication status, it should be done by now */
|
|
ret = __intel_wait_for_register(i915,
|
|
HUC_STATUS2,
|
|
HUC_FW_VERIFIED,
|
|
HUC_FW_VERIFIED,
|
|
2, 50, &status);
|
|
if (ret) {
|
|
DRM_ERROR("HuC: Firmware not verified %#x\n", status);
|
|
goto fail_unpin;
|
|
}
|
|
|
|
i915_vma_unpin(vma);
|
|
return 0;
|
|
|
|
fail_unpin:
|
|
i915_vma_unpin(vma);
|
|
fail:
|
|
huc->fw.load_status = INTEL_UC_FIRMWARE_FAIL;
|
|
|
|
DRM_ERROR("HuC: Authentication failed %d\n", ret);
|
|
return ret;
|
|
}
|
|
|
|
/**
|
|
* intel_huc_check_status() - check HuC status
|
|
* @huc: intel_huc structure
|
|
*
|
|
* This function reads status register to verify if HuC
|
|
* firmware was successfully loaded.
|
|
*
|
|
* Returns positive value if HuC firmware is loaded and verified
|
|
* and -ENODEV if HuC is not present.
|
|
*/
|
|
int intel_huc_check_status(struct intel_huc *huc)
|
|
{
|
|
struct drm_i915_private *dev_priv = huc_to_i915(huc);
|
|
u32 status;
|
|
|
|
if (!HAS_HUC(dev_priv))
|
|
return -ENODEV;
|
|
|
|
intel_runtime_pm_get(dev_priv);
|
|
status = I915_READ(HUC_STATUS2) & HUC_FW_VERIFIED;
|
|
intel_runtime_pm_put(dev_priv);
|
|
|
|
return status;
|
|
}
|