>-----Original Message-----
>From: Tvrtko Ursulin [mailto:tvrtko.ursu...@linux.intel.com]
>Sent: Tuesday, November 15, 2016 2:27 AM
>To: Srivatsa, Anusha <anusha.sriva...@intel.com>; intel-
>g...@lists.freedesktop.org
>Cc: Alex Dai <yu....@intel.com>; Peter Antoine <peter.anto...@intel.com>
>Subject: Re: [Intel-gfx] [PATCH-v11] drm/i915/huc: Add HuC fw loading support
>
>
>On 15/11/2016 00:39, Anusha Srivatsa wrote:
>> From: Peter Antoine <peter.anto...@intel.com>
>>
>> The HuC loading process is similar to GuC. The intel_uc_fw_fetch() is
>> used for both cases.
>>
>> HuC loading needs to be before GuC loading. The WOPCM setting must be
>> done early before loading any of them.
>>
>> v2: rebased on-top of drm-intel-nightly.
>> removed if(HAS_GUC()) before the guc call. (D.Gordon)
>> update huc_version number of format.
>> v3: rebased to drm-intel-nightly, changed the file name format to
>> match the one in the huc package.
>> Changed dev->dev_private to to_i915()
>> v4: moved function back to where it was.
>> change wait_for_atomic to wait_for.
>> v5: rebased + comment changes.
>> v7: rebased.
>> v8: rebased.
>> v9: rebased. Changed the year in the copyright message to reflect the
>> right year.Correct the comments,remove the unwanted WARN message,
>> replace drm_gem_object_unreference() with i915_gem_object_put().Make
>> the prototypes in intel_huc.h non-extern.
>> v10: rebased. Update the file construction done by HuC. It is similar
>> to GuC.Adopted the approach used in-
>> https://patchwork.freedesktop.org/patch/104355/ <Tvrtko Ursulin>
>> v11: Fix warnings. Remove old declaration.
>>
>> Cc: Tvrtko Ursulin <tvrtko.ursu...@intel.com>
>> Tested-by: Xiang Haihao <haihao.xi...@intel.com>
>> Signed-off-by: Anusha Srivatsa <anusha.sriva...@intel.com>
>> Signed-off-by: Alex Dai <yu....@intel.com>
>> Signed-off-by: Peter Antoine <peter.anto...@intel.com>
>> Reviewed-by: Dave Gordon <david.s.gor...@intel.com>
>> ---
>> drivers/gpu/drm/i915/Makefile | 1 +
>> drivers/gpu/drm/i915/i915_drv.h | 3 +
>> drivers/gpu/drm/i915/i915_guc_reg.h | 3 +
>> drivers/gpu/drm/i915/intel_guc.h | 1 +
>> drivers/gpu/drm/i915/intel_guc_loader.c | 6 +-
>> drivers/gpu/drm/i915/intel_huc.h | 42 +++++
>> drivers/gpu/drm/i915/intel_huc_loader.c | 269
>> ++++++++++++++++++++++++++++++++
>> 7 files changed, 323 insertions(+), 2 deletions(-) create mode
>> 100644 drivers/gpu/drm/i915/intel_huc.h create mode 100644
>> drivers/gpu/drm/i915/intel_huc_loader.c
>>
>> diff --git a/drivers/gpu/drm/i915/Makefile
>> b/drivers/gpu/drm/i915/Makefile index 3dea46a..cfea925 100644
>> --- a/drivers/gpu/drm/i915/Makefile
>> +++ b/drivers/gpu/drm/i915/Makefile
>> @@ -56,6 +56,7 @@ i915-y += i915_cmd_parser.o \
>>
>> # general-purpose microcontroller (GuC) support i915-y +=
>> intel_guc_loader.o \
>> + intel_huc_loader.o \
>> i915_guc_submission.o
>>
>> # autogenerated null render state
>> diff --git a/drivers/gpu/drm/i915/i915_drv.h
>> b/drivers/gpu/drm/i915/i915_drv.h index c4a14de..3a6c412 100644
>> --- a/drivers/gpu/drm/i915/i915_drv.h
>> +++ b/drivers/gpu/drm/i915/i915_drv.h
>> @@ -56,6 +56,7 @@
>> #include "intel_bios.h"
>> #include "intel_dpll_mgr.h"
>> #include "intel_guc.h"
>> +#include "intel_huc.h"
>> #include "intel_lrc.h"
>> #include "intel_ringbuffer.h"
>>
>> @@ -1791,6 +1792,7 @@ struct drm_i915_private {
>>
>> struct intel_gvt *gvt;
>>
>> + struct intel_huc huc;
>> struct intel_guc guc;
>>
>> struct intel_csr csr;
>> @@ -2607,6 +2609,7 @@ struct drm_i915_cmd_table {
>> #define HAS_GUC(dev_priv) ((dev_priv)->info.has_guc)
>> #define HAS_GUC_UCODE(dev_priv) (HAS_GUC(dev_priv))
>> #define HAS_GUC_SCHED(dev_priv) (HAS_GUC(dev_priv))
>> +#define HAS_HUC_UCODE(dev) (HAS_GUC(dev))
>
>Parameter name should be dev_priv.
>
>> #define HAS_RESOURCE_STREAMER(dev_priv)
>> ((dev_priv)->info.has_resource_streamer)
>>
>> diff --git a/drivers/gpu/drm/i915/i915_guc_reg.h
>> b/drivers/gpu/drm/i915/i915_guc_reg.h
>> index a47e1e4..64e942a 100644
>> --- a/drivers/gpu/drm/i915/i915_guc_reg.h
>> +++ b/drivers/gpu/drm/i915/i915_guc_reg.h
>> @@ -61,9 +61,12 @@
>> #define DMA_ADDRESS_SPACE_GTT (8 << 16)
>> #define DMA_COPY_SIZE _MMIO(0xc310)
>> #define DMA_CTRL _MMIO(0xc314)
>> +#define HUC_UKERNEL (1<<9)
>> #define UOS_MOVE (1<<4)
>> #define START_DMA (1<<0)
>> #define DMA_GUC_WOPCM_OFFSET _MMIO(0xc340)
>> +#define HUC_LOADING_AGENT_VCR (0<<1)
>> +#define HUC_LOADING_AGENT_GUC (1<<1)
>> #define GUC_WOPCM_OFFSET_VALUE 0x80000 /* 512KB */
>> #define GUC_MAX_IDLE_COUNT _MMIO(0xC3E4)
>>
>> diff --git a/drivers/gpu/drm/i915/intel_guc.h
>> b/drivers/gpu/drm/i915/intel_guc.h
>> index 46990a0..338e803 100644
>> --- a/drivers/gpu/drm/i915/intel_guc.h
>> +++ b/drivers/gpu/drm/i915/intel_guc.h
>> @@ -184,6 +184,7 @@ extern const char *intel_uc_fw_status_repr(enum
>> intel_uc_fw_status status); extern int intel_guc_suspend(struct
>> drm_device *dev); extern int intel_guc_resume(struct drm_device
>> *dev); void intel_uc_fw_fetch(struct drm_device *dev, struct
>> intel_uc_fw *uc_fw);
>> +u32 guc_wopcm_size(struct drm_i915_private *dev_priv);
>>
>> /* i915_guc_submission.c */
>> int i915_guc_submission_init(struct drm_i915_private *dev_priv); diff
>> --git a/drivers/gpu/drm/i915/intel_guc_loader.c
>> b/drivers/gpu/drm/i915/intel_guc_loader.c
>> index 70b965d..7f3fdb0 100644
>> --- a/drivers/gpu/drm/i915/intel_guc_loader.c
>> +++ b/drivers/gpu/drm/i915/intel_guc_loader.c
>> @@ -309,7 +309,8 @@ static int guc_ucode_xfer_dma(struct drm_i915_private
>*dev_priv,
>> I915_WRITE(DMA_ADDR_1_HIGH, DMA_ADDRESS_SPACE_WOPCM);
>>
>> /* Finally start the DMA */
>> - I915_WRITE(DMA_CTRL, _MASKED_BIT_ENABLE(UOS_MOVE |
>START_DMA));
>> + I915_WRITE(DMA_CTRL, _MASKED_BIT_ENABLE(UOS_MOVE |
>START_DMA) |
>> + _MASKED_BIT_DISABLE(HUC_UKERNEL));
>>
>> /*
>> * Wait for the DMA to complete & the GuC to start up.
>> @@ -334,7 +335,7 @@ static int guc_ucode_xfer_dma(struct drm_i915_private
>*dev_priv,
>> return ret;
>> }
>>
>> -static u32 guc_wopcm_size(struct drm_i915_private *dev_priv)
>> +u32 guc_wopcm_size(struct drm_i915_private *dev_priv)
>> {
>> u32 wopcm_size = GUC_WOPCM_TOP;
>>
>> @@ -512,6 +513,7 @@ int intel_guc_setup(struct drm_device *dev)
>> if (err)
>> goto fail;
>>
>> + intel_huc_load(dev);
>> err = guc_ucode_xfer(dev_priv);
>> if (!err)
>> break;
>> diff --git a/drivers/gpu/drm/i915/intel_huc.h
>> b/drivers/gpu/drm/i915/intel_huc.h
>> new file mode 100644
>> index 0000000..3ce0299
>> --- /dev/null
>> +++ b/drivers/gpu/drm/i915/intel_huc.h
>> @@ -0,0 +1,42 @@
>> +/*
>> + * Copyright © 2016 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.
>> + *
>> + */
>> +#ifndef _INTEL_HUC_H_
>> +#define _INTEL_HUC_H_
>> +
>> +#include "intel_guc.h"
>> +
>> +#define HUC_STATUS2 _MMIO(0xD3B0)
>> +#define HUC_FW_VERIFIED (1<<7)
>> +
>> +struct intel_huc {
>> + /* Generic uC firmware management */
>> + struct intel_uc_fw huc_fw;
>> +
>> + /* HuC-specific additions */
>> +};
>> +
>> +void intel_huc_init(struct drm_device *dev); void
>> +intel_huc_fini(struct drm_device *dev); int intel_huc_load(struct
>> +drm_device *dev); #endif
>> diff --git a/drivers/gpu/drm/i915/intel_huc_loader.c
>> b/drivers/gpu/drm/i915/intel_huc_loader.c
>> new file mode 100644
>> index 0000000..ce50306
>> --- /dev/null
>> +++ b/drivers/gpu/drm/i915/intel_huc_loader.c
>> @@ -0,0 +1,269 @@
>> +/*
>> + * Copyright © 2016 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/firmware.h>
>> +#include "i915_drv.h"
>> +#include "intel_huc.h"
>> +
>> +/**
>> + * DOC: HuC Firmware
>> + *
>> + * Motivation:
>> + * GEN9 introduces a new dedicated firmware for usage in media HEVC
>> +(High
>> + * Efficiency Video Coding) operations. Userspace can use the
>> +firmware
>> + * capabilities by adding HuC specific commands to batch buffers.
>> + *
>> + * Implementation:
>> + * The same firmware loader is used as the GuC. However, the actual
>> + * loading to HW is deferred until GEM initialization is done.
>> + *
>> + * Note that HuC firmware loading must be done before GuC loading.
>> + */
>> +
>> +#define SKL_FW_MAJOR 01
>> +#define SKL_FW_MINOR 07
>> +#define SKL_BLD_NUM 1398
>> +
>> +#define HUC_FW_PATH(platform, major, minor, bld_num) \
>> + "i915/" __stringify(platform) "_huc_ver" __stringify(major) "_" \
>> + __stringify(minor) "_" __stringify(bld_num) ".bin"
>
>Apologies if I missed it, but was it ever discussed why do we need the build
>number in the filename? More so, for the driver to know about it when it
>otherwise does not use it?
>
>> +
>> +#define I915_SKL_HUC_UCODE HUC_FW_PATH(skl, SKL_FW_MAJOR, \
>> + SKL_FW_MINOR, SKL_BLD_NUM)
>> +MODULE_FIRMWARE(I915_SKL_HUC_UCODE);
>> +
>> +/**
>> + * huc_ucode_xfer() - DMA's the firmware
>> + * @dev_priv: the drm device
>> + *
>> + * This function takes the gem object containing the firmware, sets
>> +up the DMA
>> + * engine MMIO, triggers the DMA operation and waits for it to finish.
>> + *
>> + * Transfer the firmware image to RAM for execution by the microcontroller.
>> + *
>> + * Return: 0 on success, non-zero on failure */
>> +
>> +static int huc_ucode_xfer(struct drm_i915_private *dev_priv) {
>> + struct intel_uc_fw *huc_fw = &dev_priv->huc.huc_fw;
>> + struct i915_vma *vma;
>> + unsigned long offset = 0;
>> + u32 size;
>> + int ret;
>> +
>> + ret = i915_gem_object_set_to_gtt_domain(huc_fw->uc_fw_obj, false);
>> + if (ret) {
>> + DRM_DEBUG_DRIVER("set-domain failed %d\n", ret);
>> + return ret;
>> + }
>> +
>> + vma = i915_gem_object_ggtt_pin(huc_fw->uc_fw_obj, NULL, 0, 0, 0);
>> + if (IS_ERR(vma)) {
>> + DRM_DEBUG_DRIVER("pin failed %d\n", (int)PTR_ERR(vma));
>> + return PTR_ERR(vma);
>> + }
>> +
>> + /* Invalidate GuC TLB to let GuC take the latest updates to GTT. */
>> + I915_WRITE(GEN8_GTCR, GEN8_GTCR_INVALIDATE);
>> +
>> + intel_uncore_forcewake_get(dev_priv, FORCEWAKE_ALL);
>> +
>> + /* init WOPCM */
>> + I915_WRITE(GUC_WOPCM_SIZE, guc_wopcm_size(dev_priv));
>> + I915_WRITE(DMA_GUC_WOPCM_OFFSET,
>GUC_WOPCM_OFFSET_VALUE |
>> + HUC_LOADING_AGENT_GUC);
>> +
>> + /* Set the source address for the uCode */
>> + offset = i915_ggtt_offset(vma) + huc_fw->header_offset;
>> + I915_WRITE(DMA_ADDR_0_LOW, lower_32_bits(offset));
>> + I915_WRITE(DMA_ADDR_0_HIGH, upper_32_bits(offset) & 0xFFFF);
>> +
>> + /* Hardware doesn't look at destination address for HuC. Set it to 0,
>> + * but still program the correct address space.
>> + */
>> + I915_WRITE(DMA_ADDR_1_LOW, 0);
>> + I915_WRITE(DMA_ADDR_1_HIGH, DMA_ADDRESS_SPACE_WOPCM);
>> +
>> + size = huc_fw->header_size + huc_fw->ucode_size;
>> + I915_WRITE(DMA_COPY_SIZE, size);
>> +
>> + /* Start the DMA */
>> + I915_WRITE(DMA_CTRL, _MASKED_BIT_ENABLE(HUC_UKERNEL |
>START_DMA));
>> +
>> + /* Wait for DMA to finish */
>> + ret = wait_for((I915_READ(DMA_CTRL) & START_DMA) == 0, 100);
>> +
>> + DRM_DEBUG_DRIVER("HuC DMA transfer wait over with ret %d\n", ret);
>> +
>> + intel_uncore_forcewake_put(dev_priv, FORCEWAKE_ALL);
>> +
>> + /*
>> + * We keep the object pages for reuse during resume. But we can unpin it
>> + * now that DMA has completed, so it doesn't continue to take up space.
>> + */
>> + i915_vma_unpin(vma);
>> +
>> + return ret;
>> +}
>
>It may be possible to extract some commonality between this and
>guc_ucode_xfer(_dma), but it can be done as a followup.
>
>> +
>> +/**
>> + * intel_huc_init() - initiate HuC firmware loading request
>> + * @dev: the drm device
>> + *
>> + * Called early during driver load, but after GEM is initialised. The
>> +loading
>> + * will continue only when driver explicitly specify firmware name and
>> version.
>> + * All other cases are considered as UC_FIRMWARE_NONE either because
>> +HW is not
>> + * capable or driver yet support it. And there will be no error
>> +message for
>> + * UC_FIRMWARE_NONE cases.
>> + *
>> + * The DMA-copying to HW is done later when intel_huc_load() is called.
>> + */
>> +void intel_huc_init(struct drm_device *dev) {
>> + struct drm_i915_private *dev_priv = to_i915(dev);
>> + struct intel_huc *huc = &dev_priv->huc;
>> + struct intel_uc_fw *huc_fw = &huc->huc_fw;
>> + const char *fw_path = NULL;
>> +
>> + huc_fw->uc_dev = dev;
>> + huc_fw->uc_fw_path = NULL;
>> + huc_fw->fetch_status = UC_FIRMWARE_NONE;
>> + huc_fw->load_status = UC_FIRMWARE_NONE;
>> + huc_fw->fw_type = UC_FW_TYPE_HUC;
>> +
>> + if (!HAS_HUC_UCODE(dev_priv))
>> + return;
>> +
>> + if (IS_SKYLAKE(dev_priv)) {
>> + fw_path = I915_SKL_HUC_UCODE;
>> + huc_fw->major_ver_wanted = SKL_FW_MAJOR;
>> + huc_fw->minor_ver_wanted = SKL_FW_MINOR;
>> + }
>
>Why not "else return" instead of the fw_path check below? (Could remove
>fw_path = NULL initializer then).
Yes. I agree. Will remove that block.
>> +
>> + if (fw_path == NULL)
>> + return;
>> +
>> + huc_fw->uc_fw_path = fw_path;
>> + huc_fw->fetch_status = UC_FIRMWARE_PENDING;
>> +
>> + DRM_DEBUG_DRIVER("HuC firmware pending, path %s\n", fw_path);
>> +
>> + intel_uc_fw_fetch(dev, huc_fw);
>> +}
>> +
>> +/**
>> + * intel_huc_load() - load HuC uCode to device
>> + * @dev: the drm device
>> + *
>> + * Called from gem_init_hw() during driver loading and also after a GPU
>> reset.
>> + * Be note that HuC loading must be done before GuC loading.
>> + *
>> + * The firmware image should have already been fetched into memory by
>> +the
>> + * earlier call to intel_huc_ucode_init(), so here we need only check
>> +that
>
>intel_huc_ucode_init exists anywhere?
>
>> + * is succeeded, and then transfer the image to the h/w.
>> + *
>> + * Return: non-zero code on error
>> + */
>> +int intel_huc_load(struct drm_device *dev) {
>> + struct drm_i915_private *dev_priv = to_i915(dev);
>> + struct intel_uc_fw *huc_fw = &dev_priv->huc.huc_fw;
>> + int err;
>> +
>> + if (huc_fw->fetch_status == UC_FIRMWARE_NONE)
>> + return 0;
>> +
>> + DRM_DEBUG_DRIVER("%s fw status: fetch %s, load %s\n",
>> + huc_fw->uc_fw_path,
>> + intel_uc_fw_status_repr(huc_fw->fetch_status),
>> + intel_uc_fw_status_repr(huc_fw->load_status));
>> +
>> + if (huc_fw->fetch_status == UC_FIRMWARE_SUCCESS &&
>> + huc_fw->load_status == UC_FIRMWARE_FAIL)
>> + return -ENOEXEC;
>> +
>> + huc_fw->load_status = UC_FIRMWARE_PENDING;
>> +
>> + switch (huc_fw->fetch_status) {
>> + case UC_FIRMWARE_FAIL:
>> + /* something went wrong :( */
>> + err = -EIO;
>> + goto fail;
>> +
>> + case UC_FIRMWARE_NONE:
>> + case UC_FIRMWARE_PENDING:
>> + default:
>> + /* "can't happen" */
>> + WARN_ONCE(1, "HuC fw %s invalid fetch_status %s [%d]\n",
>> + huc_fw->uc_fw_path,
>> + intel_uc_fw_status_repr(huc_fw->fetch_status),
>> + huc_fw->fetch_status);
>> + err = -ENXIO;
>> + goto fail;
>> +
>> + case UC_FIRMWARE_SUCCESS:
>> + break;
>> + }
>> +
>> + err = huc_ucode_xfer(dev_priv);
>> + if (err)
>> + goto fail;
>> +
>> + huc_fw->load_status = UC_FIRMWARE_SUCCESS;
>> +
>> + DRM_DEBUG_DRIVER("%s fw status: fetch %s, load %s\n",
>> + huc_fw->uc_fw_path,
>> + intel_uc_fw_status_repr(huc_fw->fetch_status),
>> + intel_uc_fw_status_repr(huc_fw->load_status));
>> +
>> + return 0;
>> +
>> +fail:
>> + if (huc_fw->load_status == UC_FIRMWARE_PENDING)
>> + huc_fw->load_status = UC_FIRMWARE_FAIL;
>> +
>> + DRM_ERROR("Failed to complete HuC uCode load with ret %d\n", err);
>> +
>> + return err;
>> +}
>> +
>> +/**
>> + * intel_huc_fini() - clean up resources allocated for HuC
>> + * @dev: the drm device
>> + *
>> + * Cleans up by releasing the huc firmware GEM obj.
>> + */
>> +void intel_huc_fini(struct drm_device *dev) {
>> + struct drm_i915_private *dev_priv = to_i915(dev);
>> + struct intel_uc_fw *huc_fw = &dev_priv->huc.huc_fw;
>> +
>> + mutex_lock(&dev->struct_mutex);
>> + if (huc_fw->uc_fw_obj)
>> + i915_gem_object_put(huc_fw->uc_fw_obj);
>> + huc_fw->uc_fw_obj = NULL;
>> + mutex_unlock(&dev->struct_mutex);
>> +
>> + huc_fw->fetch_status = UC_FIRMWARE_NONE; }
>>
>
>Regards,
>
>Tvrtko
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