diff options
Diffstat (limited to 'drivers/gpu/drm/i915/intel_huc.c')
| -rw-r--r-- | drivers/gpu/drm/i915/intel_huc.c | 182 |
1 files changed, 0 insertions, 182 deletions
diff --git a/drivers/gpu/drm/i915/intel_huc.c b/drivers/gpu/drm/i915/intel_huc.c deleted file mode 100644 index fb6f693d3cac..000000000000 --- a/drivers/gpu/drm/i915/intel_huc.c +++ /dev/null @@ -1,182 +0,0 @@ -/* - * 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) -{ - struct drm_i915_private *i915 = huc_to_i915(huc); - - intel_huc_fw_init_early(huc); - - if (INTEL_GEN(i915) >= 11) { - huc->status.reg = GEN11_HUC_KERNEL_LOAD_INFO; - huc->status.mask = HUC_LOAD_SUCCESSFUL; - huc->status.value = HUC_LOAD_SUCCESSFUL; - } else { - huc->status.reg = HUC_STATUS2; - huc->status.mask = HUC_FW_VERIFIED; - huc->status.value = HUC_FW_VERIFIED; - } -} - -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; -} - -static int intel_huc_rsa_data_create(struct intel_huc *huc) -{ - struct drm_i915_private *i915 = huc_to_i915(huc); - struct intel_guc *guc = &i915->guc; - struct i915_vma *vma; - void *vaddr; - - /* - * HuC firmware will sit above GUC_GGTT_TOP and will not map - * through GTT. Unfortunately, this means GuC cannot perform - * the HuC auth. as the rsa offset now falls within the GuC - * inaccessible range. We resort to perma-pinning an additional - * vma within the accessible range that only contains the rsa - * signature. The GuC can use this extra pinning to perform - * the authentication since its GGTT offset will be GuC - * accessible. - */ - vma = intel_guc_allocate_vma(guc, PAGE_SIZE); - if (IS_ERR(vma)) - return PTR_ERR(vma); - - vaddr = i915_gem_object_pin_map(vma->obj, I915_MAP_WB); - if (IS_ERR(vaddr)) { - i915_vma_unpin_and_release(&vma, 0); - return PTR_ERR(vaddr); - } - - huc->rsa_data = vma; - huc->rsa_data_vaddr = vaddr; - - return 0; -} - -static void intel_huc_rsa_data_destroy(struct intel_huc *huc) -{ - i915_vma_unpin_and_release(&huc->rsa_data, I915_VMA_RELEASE_MAP); -} - -int intel_huc_init(struct intel_huc *huc) -{ - int err; - - err = intel_huc_rsa_data_create(huc); - if (err) - return err; - - return intel_uc_fw_init(&huc->fw); -} - -void intel_huc_fini(struct intel_huc *huc) -{ - intel_uc_fw_fini(&huc->fw); - intel_huc_rsa_data_destroy(huc); -} - -/** - * 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; - int ret; - - if (huc->fw.load_status != INTEL_UC_FIRMWARE_SUCCESS) - return -ENOEXEC; - - ret = intel_guc_auth_huc(guc, - intel_guc_ggtt_offset(guc, huc->rsa_data)); - if (ret) { - DRM_ERROR("HuC: GuC did not ack Auth request %d\n", ret); - goto fail; - } - - /* Check authentication status, it should be done by now */ - ret = __intel_wait_for_register(&i915->uncore, - huc->status.reg, - huc->status.mask, - huc->status.value, - 2, 50, NULL); - if (ret) { - DRM_ERROR("HuC: Firmware not verified %d\n", ret); - goto fail; - } - - return 0; - -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: 1 if HuC firmware is loaded and verified, - * 0 if HuC firmware is not loaded and -ENODEV if HuC - * is not present on this platform. - */ -int intel_huc_check_status(struct intel_huc *huc) -{ - struct drm_i915_private *dev_priv = huc_to_i915(huc); - intel_wakeref_t wakeref; - bool status = false; - - if (!HAS_HUC(dev_priv)) - return -ENODEV; - - with_intel_runtime_pm(&dev_priv->runtime_pm, wakeref) - status = (I915_READ(huc->status.reg) & huc->status.mask) == - huc->status.value; - - return status; -} |