Re: [PATCH 3/8] drm/i915/huc: Add HuC fw loading support

Jeff McGee
2016-10-13T20:46:01Z

On Thu, Oct 13, 2016 at 10:42:42AM -0700, Jeff McGee wrote:
> On Mon, Oct 03, 2016 at 11:42:57AM -0700, Anusha Srivatsa wrote:
> > From: Peter Antoine <peter.antoine@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.
> >
> > Tested-by: Xiang Haihao <haihao.xiang@intel.com>
> > Signed-off-by: Anusha Srivatsa <anusha.srivatsa@intel.com>
> > Signed-off-by: Alex Dai <yu.dai@intel.com>
> > Signed-off-by: Peter Antoine <peter.antoine@intel.com>
> > Reviewed-by: Dave Gordon <david.s.gordon@intel.com>
> > ---
> > drivers/gpu/drm/i915/Makefile | 1 +
> > drivers/gpu/drm/i915/i915_drv.c | 3 +
> > 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 | 44 ++++++
> > drivers/gpu/drm/i915/intel_huc_loader.c | 268 ++++++++++++++++++++++++++++++++
> > 8 files changed, 327 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 e6fe004..6e99c51 100644
> > --- a/drivers/gpu/drm/i915/Makefile
> > +++ b/drivers/gpu/drm/i915/Makefile
> > @@ -53,6 +53,7 @@ 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.c b/drivers/gpu/drm/i915/i915_drv.c
> > index 31b2b63..7af7bd6 100644
> > --- a/drivers/gpu/drm/i915/i915_drv.c
> > +++ b/drivers/gpu/drm/i915/i915_drv.c
> > @@ -613,6 +613,7 @@ static int i915_load_modeset_init(struct drm_device *dev)
> > * working irqs for e.g. gmbus and dp aux transfers. */
> > intel_modeset_init(dev);
> >
> > + intel_huc_init(dev);
> > intel_guc_init(dev);
> >
> > ret = i915_gem_init(dev);
> > @@ -638,6 +639,7 @@ static int i915_load_modeset_init(struct drm_device *dev)
> > cleanup_gem:
> > i915_gem_fini(dev);
> > cleanup_irq:
> > + intel_huc_fini(dev);
> > intel_guc_fini(dev);
> > drm_irq_uninstall(dev);
> > intel_teardown_gmbus(dev);
> > @@ -1315,6 +1317,7 @@ void i915_driver_unload(struct drm_device *dev)
> > /* Flush any outstanding unpin_work. */
> > drain_workqueue(dev_priv->wq);
> >
> > + intel_huc_fini(dev);
> > intel_guc_fini(dev);
> > i915_gem_fini(dev);
> > intel_fbc_cleanup_cfb(dev_priv);
> > diff --git a/drivers/gpu/drm/i915/i915_drv.h b/drivers/gpu/drm/i915/i915_drv.h
> > index e0cb71c..625aa92 100644
> > --- a/drivers/gpu/drm/i915/i915_drv.h
> > +++ b/drivers/gpu/drm/i915/i915_drv.h
> > @@ -55,6 +55,7 @@
> > #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"
> >
> > @@ -1766,6 +1767,7 @@ struct drm_i915_private {
> >
> > struct intel_gvt gvt;
> >
> > + struct intel_huc huc;
> > struct intel_guc guc;
> >
> > struct intel_csr csr;
> > @@ -2822,6 +2824,7 @@ struct drm_i915_cmd_table {
> > #define HAS_GUC(dev) (INTEL_INFO(dev)->has_guc)
> > #define HAS_GUC_UCODE(dev) (HAS_GUC(dev))
> > #define HAS_GUC_SCHED(dev) (HAS_GUC(dev))
> > +#define HAS_HUC_UCODE(dev) (HAS_GUC(dev))
> >
> > #define HAS_RESOURCE_STREAMER(dev) (INTEL_INFO(dev)->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 812e4ca..af76ffe 100644
> > --- a/drivers/gpu/drm/i915/intel_guc.h
> > +++ b/drivers/gpu/drm/i915/intel_guc.h
> > @@ -160,6 +160,7 @@ 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 0b863a1..0d214b4 100644
> > --- a/drivers/gpu/drm/i915/intel_guc_loader.c
> > +++ b/drivers/gpu/drm/i915/intel_guc_loader.c
> > @@ -305,7 +305,8 @@ 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.
> > @@ -330,7 +331,7 @@ 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;
> >
> > @@ -508,6 +509,7 @@ 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..946caa7
> > --- /dev/null
> > +++ b/drivers/gpu/drm/i915/intel_huc.h
> > @@ -0,0 +1,44 @@
> > +/*
> > + * Copyright © 2014 Intel Corporation
>
> Should this be 2016?
>
> > + *
> > + * 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 */
> > +};
> > +
> > +extern void intel_huc_init(struct drm_device *dev);
> > +extern int intel_huc_load(struct drm_device *dev);
> > +extern void intel_huc_auth(struct drm_device *dev);
> > +extern void intel_huc_fini(struct drm_device *dev);
These don't need extern. Please remove. Also intel_huc_auth comes in with
later patch in the series so would be better to drop from here.

> > +
> > +#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..1aaff67
> > --- /dev/null
> > +++ b/drivers/gpu/drm/i915/intel_huc_loader.c
> > @@ -0,0 +1,268 @@
> > +/*
> > + * Copyright © 2014 Intel Corporation
>
> Should this be 2016?
>
> > + *
> > + * 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:
> > + * On supported platforms, i915's job is to load the firmware stored on the
> > + * file system and assist with authentication. It is up to userspace to
> > + * detect the presence of HuC support on a platform, on their own.
> > + * For debugging, i915 provides a debugfs file, i915_huc_load_status_info
> > + * which displays the firmware load status.
> Above comment refers to features added in subsequent patches and is not
> entirely accurate at that. So I would just remove this whole block. Less
> commenting is better than misleading commenting.
>
> > + *
> > + * The same firmware loader is used as the GuC. Firmware * binary is fetched by
> > + * the loader asynchronously from the driver init process. However, the actual
> Remove * from "Firmware * binary". Loading is not asynchronous so remove this
> statement.
>
> > + * loading to HW is deferred until GEM initialization is done.
> > + *
> > + * Note that HuC firmware loading must be done before GuC loading.
> > + */
> > +
> > +#define I915_SKL_HUC_UCODE "i915/skl_huc_ver01_07_1398.bin"
> > +MODULE_FIRMWARE(I915_SKL_HUC_UCODE);
> Please update to use the new approach used by GuC for specifying
> required version and constructing the file path. See intel_guc_loader.c.
> HuC firmware versioning includes the build number after the minor so
> some modification will be needed.
>
> > +
> > +/**
> > + * intel_huc_load_ucode() - DMA's the firmware
> > + * @dev: the drm device
> Fix name and parameter
>
> > + *
> > + * 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);
> > +
> > + WARN_ON(!mutex_is_locked(&dev_priv->drm.struct_mutex));
> I don't see reason for this WARN_ON check. This function is called
> in well defined paths that require locking way up the chain.
> I think we can remove it.
>
> > + 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;
> > +}
> > +
> > +/**
> > + * 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_ucode_load() is called.
> intel_huc_ucode_load() should be intel_huc_load().
>
> > + */
> > +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 = 1;
> > + huc_fw->minor_ver_wanted = 7;
> > + }
> > +
> > + 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
> > + * 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)
> > + drm_gem_object_unreference(&huc_fw->uc_fw_obj->base);
> These are now replaced with 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;
> > +}
> > --
> > 2.7.4
> >
> > _______________________________________________
> > Intel-gfx mailing list
> > Intel-gfx@lists.freedesktop.org
> > https://lists.freedesktop.org/mailman/listinfo/intel-gfx
> _______________________________________________
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