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https://github.com/AuxXxilium/linux_dsm_epyc7002.git
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0dfa1cee61
Our new "enable_guc" modparam allows to control whenever HuC should be loaded. However existing code will try load and authenticate HuC always when we use the GuC. This patch is trying to enforce modparam selection. v2: no need to cast PTR_ERR (Chris) fetch/fini only if required (Michal) fix wrong break (Sagar) v3: add new goto label (Sagar) Signed-off-by: Michal Wajdeczko <michal.wajdeczko@intel.com> Cc: Chris Wilson <chris@chris-wilson.co.uk> Cc: Joonas Lahtinen <joonas.lahtinen@linux.intel.com> Cc: Sagar Arun Kamble <sagar.a.kamble@intel.com> Reviewed-by: Sagar Arun Kamble <sagar.a.kamble@intel.com> Signed-off-by: Chris Wilson <chris@chris-wilson.co.uk> Link: https://patchwork.freedesktop.org/patch/msgid/20171206135316.32556-7-michal.wajdeczko@intel.com
248 lines
7.5 KiB
C
248 lines
7.5 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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/**
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* DOC: HuC Firmware
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*
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* Motivation:
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* GEN9 introduces a new dedicated firmware for usage in media HEVC (High
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* Efficiency Video Coding) operations. Userspace can use the firmware
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* capabilities by adding HuC specific commands to batch buffers.
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*
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* Implementation:
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* The same firmware loader is used as the GuC. However, the actual
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* loading to HW is deferred until GEM initialization is done.
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*
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* Note that HuC firmware loading must be done before GuC loading.
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*/
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#define BXT_HUC_FW_MAJOR 01
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#define BXT_HUC_FW_MINOR 07
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#define BXT_BLD_NUM 1398
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#define SKL_HUC_FW_MAJOR 01
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#define SKL_HUC_FW_MINOR 07
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#define SKL_BLD_NUM 1398
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#define KBL_HUC_FW_MAJOR 02
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#define KBL_HUC_FW_MINOR 00
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#define KBL_BLD_NUM 1810
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#define GLK_HUC_FW_MAJOR 02
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#define GLK_HUC_FW_MINOR 00
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#define GLK_BLD_NUM 1748
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#define HUC_FW_PATH(platform, major, minor, bld_num) \
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"i915/" __stringify(platform) "_huc_ver" __stringify(major) "_" \
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__stringify(minor) "_" __stringify(bld_num) ".bin"
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#define I915_SKL_HUC_UCODE HUC_FW_PATH(skl, SKL_HUC_FW_MAJOR, \
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SKL_HUC_FW_MINOR, SKL_BLD_NUM)
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MODULE_FIRMWARE(I915_SKL_HUC_UCODE);
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#define I915_BXT_HUC_UCODE HUC_FW_PATH(bxt, BXT_HUC_FW_MAJOR, \
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BXT_HUC_FW_MINOR, BXT_BLD_NUM)
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MODULE_FIRMWARE(I915_BXT_HUC_UCODE);
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#define I915_KBL_HUC_UCODE HUC_FW_PATH(kbl, KBL_HUC_FW_MAJOR, \
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KBL_HUC_FW_MINOR, KBL_BLD_NUM)
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MODULE_FIRMWARE(I915_KBL_HUC_UCODE);
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#define I915_GLK_HUC_UCODE HUC_FW_PATH(glk, GLK_HUC_FW_MAJOR, \
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GLK_HUC_FW_MINOR, GLK_BLD_NUM)
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static void huc_fw_select(struct intel_uc_fw *huc_fw)
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{
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struct intel_huc *huc = container_of(huc_fw, struct intel_huc, fw);
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struct drm_i915_private *dev_priv = huc_to_i915(huc);
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GEM_BUG_ON(huc_fw->type != INTEL_UC_FW_TYPE_HUC);
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if (!HAS_HUC(dev_priv))
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return;
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if (i915_modparams.huc_firmware_path) {
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huc_fw->path = i915_modparams.huc_firmware_path;
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huc_fw->major_ver_wanted = 0;
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huc_fw->minor_ver_wanted = 0;
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} else if (IS_SKYLAKE(dev_priv)) {
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huc_fw->path = I915_SKL_HUC_UCODE;
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huc_fw->major_ver_wanted = SKL_HUC_FW_MAJOR;
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huc_fw->minor_ver_wanted = SKL_HUC_FW_MINOR;
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} else if (IS_BROXTON(dev_priv)) {
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huc_fw->path = I915_BXT_HUC_UCODE;
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huc_fw->major_ver_wanted = BXT_HUC_FW_MAJOR;
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huc_fw->minor_ver_wanted = BXT_HUC_FW_MINOR;
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} else if (IS_KABYLAKE(dev_priv) || IS_COFFEELAKE(dev_priv)) {
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huc_fw->path = I915_KBL_HUC_UCODE;
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huc_fw->major_ver_wanted = KBL_HUC_FW_MAJOR;
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huc_fw->minor_ver_wanted = KBL_HUC_FW_MINOR;
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} else if (IS_GEMINILAKE(dev_priv)) {
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huc_fw->path = I915_GLK_HUC_UCODE;
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huc_fw->major_ver_wanted = GLK_HUC_FW_MAJOR;
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huc_fw->minor_ver_wanted = GLK_HUC_FW_MINOR;
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} else {
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DRM_WARN("%s: No firmware known for this platform!\n",
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intel_uc_fw_type_repr(huc_fw->type));
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}
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}
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/**
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* intel_huc_init_early() - initializes HuC struct
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* @huc: intel_huc struct
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*
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* On platforms with HuC selects firmware for uploading
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*/
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void intel_huc_init_early(struct intel_huc *huc)
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{
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struct intel_uc_fw *huc_fw = &huc->fw;
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intel_uc_fw_init(huc_fw, INTEL_UC_FW_TYPE_HUC);
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huc_fw_select(huc_fw);
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}
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/**
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* huc_ucode_xfer() - DMA's the firmware
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* @dev_priv: the drm_i915_private device
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*
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* Transfer the firmware image to RAM for execution by the microcontroller.
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*
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* Return: 0 on success, non-zero on failure
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*/
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static int huc_ucode_xfer(struct intel_uc_fw *huc_fw, struct i915_vma *vma)
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{
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struct intel_huc *huc = container_of(huc_fw, struct intel_huc, fw);
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struct drm_i915_private *dev_priv = huc_to_i915(huc);
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unsigned long offset = 0;
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u32 size;
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int ret;
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GEM_BUG_ON(huc_fw->type != INTEL_UC_FW_TYPE_HUC);
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intel_uncore_forcewake_get(dev_priv, FORCEWAKE_ALL);
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/* Set the source address for the uCode */
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offset = guc_ggtt_offset(vma) + huc_fw->header_offset;
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I915_WRITE(DMA_ADDR_0_LOW, lower_32_bits(offset));
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I915_WRITE(DMA_ADDR_0_HIGH, upper_32_bits(offset) & 0xFFFF);
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/* Hardware doesn't look at destination address for HuC. Set it to 0,
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* but still program the correct address space.
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*/
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I915_WRITE(DMA_ADDR_1_LOW, 0);
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I915_WRITE(DMA_ADDR_1_HIGH, DMA_ADDRESS_SPACE_WOPCM);
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size = huc_fw->header_size + huc_fw->ucode_size;
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I915_WRITE(DMA_COPY_SIZE, size);
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/* Start the DMA */
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I915_WRITE(DMA_CTRL, _MASKED_BIT_ENABLE(HUC_UKERNEL | START_DMA));
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/* Wait for DMA to finish */
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ret = intel_wait_for_register_fw(dev_priv, DMA_CTRL, START_DMA, 0, 100);
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DRM_DEBUG_DRIVER("HuC DMA transfer wait over with ret %d\n", ret);
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/* Disable the bits once DMA is over */
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I915_WRITE(DMA_CTRL, _MASKED_BIT_DISABLE(HUC_UKERNEL));
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intel_uncore_forcewake_put(dev_priv, FORCEWAKE_ALL);
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return ret;
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}
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/**
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* intel_huc_init_hw() - load HuC uCode to device
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* @huc: intel_huc structure
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*
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* Called from intel_uc_init_hw() during driver loading and also after a GPU
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* reset. Be note that HuC loading must be done before GuC loading.
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*
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* The firmware image should have already been fetched into memory by the
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* earlier call to intel_uc_init_fw(), so here we need only check that
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* is succeeded, and then transfer the image to the h/w.
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*
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*/
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int intel_huc_init_hw(struct intel_huc *huc)
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{
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return intel_uc_fw_upload(&huc->fw, huc_ucode_xfer);
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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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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 | GUC_WOPCM_TOP);
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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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return ret;
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}
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ret = intel_guc_auth_huc(guc,
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guc_ggtt_offset(vma) + 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 out;
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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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50);
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if (ret) {
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DRM_ERROR("HuC: Authentication failed %d\n", ret);
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goto out;
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}
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out:
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i915_vma_unpin(vma);
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return ret;
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}
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