diff options
author | Anusha Srivatsa <anusha.srivatsa@intel.com> | 2017-01-18 19:05:53 +0300 |
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committer | Jani Nikula <jani.nikula@intel.com> | 2017-01-19 12:18:55 +0300 |
commit | bd132858e9f9ad1c03a7d4982deaac7f0c0a4f0d (patch) | |
tree | ce1148064851f787eeae6fba8731b7b6cbd65e87 /drivers/gpu/drm/i915/intel_huc.c | |
parent | 5b8cd0755f8a06a851c436a013e7be0823fb155a (diff) | |
download | linux-bd132858e9f9ad1c03a7d4982deaac7f0c0a4f0d.tar.xz |
drm/i915/huc: Add HuC fw loading support
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. 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.
v6: 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>
v7: Change dev to dev_priv in macro definition.
Corrected comments.
v8: rebased on top of drm-tip. Updated functions intel_huc_load(),
intel_huc_init() and intel_uc_fw_fetch() to accept dev_priv instead of
dev. Moved contents of intel_huc.h to intel_uc.h.
v9: change SKL_FW_ to SKL_HUC_FW_. Add intel_ prefix to guc_wopcm_size().
Remove unwanted checks in intel_uc.h. Rename huc_fw in struct intel_huc to
simply fw to avoid redundency.
v10: rebased. Correct comments. Make intel_huc_fini() accept dev_priv
instead of dev like intel_huc_init() and intel_huc_load().Move definition
to i915_guc_reg.h from intel_uc.h. Clean DMA_CTRL bits after HuC DMA
transfer in huc_ucode_xfer() instead of guc_ucode_xfer(). Add suitable
WARNs to give extra info.
v11: rebased. Add proper bias for HuC and make sure there are
asserts on failure by using guc_ggtt_offset_vma(). Introduce
intel_huc.c and remove intel_huc_loader.c since it has functions that
do more than just loading.Correct year in copyright.
v12: remove invalidates that are not required anymore.
Cc: Arkadiusz Hiler <arkadiusz.hiler@intel.com>
Cc: Michal Wajdeczko <michal.wajdeczko@intel.com>
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: Michal Wajdeczko <michal.wajdeczko@intel.com>
Signed-off-by: Jani Nikula <jani.nikula@intel.com>
Link: http://patchwork.freedesktop.org/patch/msgid/1484755558-1234-1-git-send-email-anusha.srivatsa@intel.com
Diffstat (limited to 'drivers/gpu/drm/i915/intel_huc.c')
-rw-r--r-- | drivers/gpu/drm/i915/intel_huc.c | 262 |
1 files changed, 262 insertions, 0 deletions
diff --git a/drivers/gpu/drm/i915/intel_huc.c b/drivers/gpu/drm/i915/intel_huc.c new file mode 100644 index 000000000000..57471f26709b --- /dev/null +++ b/drivers/gpu/drm/i915/intel_huc.c @@ -0,0 +1,262 @@ +/* + * 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/firmware.h> +#include "i915_drv.h" +#include "intel_uc.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_HUC_FW_MAJOR 01 +#define SKL_HUC_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" + +#define I915_SKL_HUC_UCODE HUC_FW_PATH(skl, SKL_HUC_FW_MAJOR, \ + SKL_HUC_FW_MINOR, SKL_BLD_NUM) +MODULE_FIRMWARE(I915_SKL_HUC_UCODE); + +/** + * huc_ucode_xfer() - DMA's the firmware + * @dev_priv: the drm_i915_private device + * + * 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.fw; + struct i915_vma *vma; + unsigned long offset = 0; + u32 size; + int ret; + + ret = i915_gem_object_set_to_gtt_domain(huc_fw->obj, false); + if (ret) { + DRM_DEBUG_DRIVER("set-domain failed %d\n", ret); + return ret; + } + + vma = i915_gem_object_ggtt_pin(huc_fw->obj, NULL, 0, 0, + PIN_OFFSET_BIAS | GUC_WOPCM_TOP); + if (IS_ERR(vma)) { + DRM_DEBUG_DRIVER("pin failed %d\n", (int)PTR_ERR(vma)); + return PTR_ERR(vma); + } + + intel_uncore_forcewake_get(dev_priv, FORCEWAKE_ALL); + + /* init WOPCM */ + I915_WRITE(GUC_WOPCM_SIZE, intel_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 = guc_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); + + /* Disable the bits once DMA is over */ + I915_WRITE(DMA_CTRL, _MASKED_BIT_DISABLE(HUC_UKERNEL)); + + 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_priv: the drm_i915_private 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 INTEL_UC_FIRMWARE_NONE either because HW + * is not capable or driver yet support it. And there will be no error message + * for INTEL_UC_FIRMWARE_NONE cases. + * + * The DMA-copying to HW is done later when intel_huc_load() is called. + */ +void intel_huc_init(struct drm_i915_private *dev_priv) +{ + struct intel_huc *huc = &dev_priv->huc; + struct intel_uc_fw *huc_fw = &huc->fw; + const char *fw_path = NULL; + + huc_fw->path = NULL; + huc_fw->fetch_status = INTEL_UC_FIRMWARE_NONE; + huc_fw->load_status = INTEL_UC_FIRMWARE_NONE; + huc_fw->fw = INTEL_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_HUC_FW_MAJOR; + huc_fw->minor_ver_wanted = SKL_HUC_FW_MINOR; + } + + huc_fw->path = fw_path; + huc_fw->fetch_status = INTEL_UC_FIRMWARE_PENDING; + + DRM_DEBUG_DRIVER("HuC firmware pending, path %s\n", fw_path); + + WARN(huc_fw->path == NULL, "HuC present but no fw path\n"); + + intel_uc_fw_fetch(dev_priv, huc_fw); +} + +/** + * intel_huc_load() - load HuC uCode to device + * @dev_priv: the drm_i915_private device + * + * Called from guc_setup() 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_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_i915_private *dev_priv) +{ + struct intel_uc_fw *huc_fw = &dev_priv->huc.fw; + int err; + + if (huc_fw->fetch_status == INTEL_UC_FIRMWARE_NONE) + return 0; + + DRM_DEBUG_DRIVER("%s fw status: fetch %s, load %s\n", + huc_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 == INTEL_UC_FIRMWARE_SUCCESS && + huc_fw->load_status == INTEL_UC_FIRMWARE_FAIL) + return -ENOEXEC; + + huc_fw->load_status = INTEL_UC_FIRMWARE_PENDING; + + switch (huc_fw->fetch_status) { + case INTEL_UC_FIRMWARE_FAIL: + /* something went wrong :( */ + err = -EIO; + goto fail; + + case INTEL_UC_FIRMWARE_NONE: + case INTEL_UC_FIRMWARE_PENDING: + default: + /* "can't happen" */ + WARN_ONCE(1, "HuC fw %s invalid fetch_status %s [%d]\n", + huc_fw->path, + intel_uc_fw_status_repr(huc_fw->fetch_status), + huc_fw->fetch_status); + err = -ENXIO; + goto fail; + + case INTEL_UC_FIRMWARE_SUCCESS: + break; + } + + err = huc_ucode_xfer(dev_priv); + if (err) + goto fail; + + huc_fw->load_status = INTEL_UC_FIRMWARE_SUCCESS; + + DRM_DEBUG_DRIVER("%s fw status: fetch %s, load %s\n", + huc_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 == INTEL_UC_FIRMWARE_PENDING) + huc_fw->load_status = INTEL_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_priv: the drm_i915_private device + * + * Cleans up by releasing the huc firmware GEM obj. + */ +void intel_huc_fini(struct drm_i915_private *dev_priv) +{ + struct intel_uc_fw *huc_fw = &dev_priv->huc.fw; + + mutex_lock(&dev_priv->drm.struct_mutex); + if (huc_fw->obj) + i915_gem_object_put(huc_fw->obj); + huc_fw->obj = NULL; + mutex_unlock(&dev_priv->drm.struct_mutex); + + huc_fw->fetch_status = INTEL_UC_FIRMWARE_NONE; +} + |