On Fri, Feb 24, 2017 at 04:40:02PM +0100, Arkadiusz Hiler wrote:
> Currently fw->path values can represent one of three possible states:
>
> 1) NULL - device without the uC
> 2) '\0' - device with the uC but have no firmware
> 3) else - device with the uC and we have firmware
>
> Second case is used only to WARN at a later stage.
>
> We can WARN right away and merge cases 1 and 2.
>
> Code can be even further simplified and common (HuC/GuC logic) happening
> right before the fetch can be offloaded to the common function.
>
> v2: fewer temporary variables, more straightforward flow (M. Wajdeczko)
> v3: DRM_ERROR instead of WARN (M. Wajdeczko)
> v4: coding standard (J. Lahtinen)
>
> Cc: Anusha Srivatsa <anusha.sriva...@intel.com>
> Cc: Tvrtko Ursulin <tvrtko.ursu...@intel.com>
> Cc: Michal Winiarski <michal.winiar...@intel.com>
> Cc: Michal Wajdeczko <michal.wajdec...@intel.com>
> Cc: Joonas Lahtinen <joonas.lahti...@linux.intel.com>
> Signed-off-by: Arkadiusz Hiler <arkadiusz.hi...@intel.com>
> ---
> drivers/gpu/drm/i915/intel_guc_loader.c | 39
> +++++++++++----------------------
> drivers/gpu/drm/i915/intel_huc.c | 20 +++++------------
> drivers/gpu/drm/i915/intel_uc.c | 4 +++-
> 3 files changed, 22 insertions(+), 41 deletions(-)
>
<snip>
> @@ -483,39 +478,31 @@ int intel_guc_init_hw(struct drm_i915_private *dev_priv)
> void intel_guc_init_fw(struct intel_guc *guc)
> {
> struct drm_i915_private *dev_priv = guc_to_i915(guc);
> - const char *fw_path;
>
> - if (!HAS_GUC_UCODE(dev_priv)) {
> - fw_path = NULL;
> - } else if (IS_SKYLAKE(dev_priv)) {
> - fw_path = I915_SKL_GUC_UCODE;
> + guc->fw.path = NULL;
> + guc->fw.fetch_status = INTEL_UC_FIRMWARE_NONE;
> + guc->fw.load_status = INTEL_UC_FIRMWARE_NONE;
> + guc->fw.fw = INTEL_UC_FW_TYPE_GUC;
> +
> + if (IS_SKYLAKE(dev_priv)) {
> + guc->fw.path = I915_SKL_GUC_UCODE;
> guc->fw.major_ver_wanted = SKL_FW_MAJOR;
> guc->fw.minor_ver_wanted = SKL_FW_MINOR;
> } else if (IS_BROXTON(dev_priv)) {
> - fw_path = I915_BXT_GUC_UCODE;
> + guc->fw.path = I915_BXT_GUC_UCODE;
> guc->fw.major_ver_wanted = BXT_FW_MAJOR;
> guc->fw.minor_ver_wanted = BXT_FW_MINOR;
> } else if (IS_KABYLAKE(dev_priv)) {
> - fw_path = I915_KBL_GUC_UCODE;
> + guc->fw.path = I915_KBL_GUC_UCODE;
> guc->fw.major_ver_wanted = KBL_FW_MAJOR;
> guc->fw.minor_ver_wanted = KBL_FW_MINOR;
> } else {
> - fw_path = ""; /* unknown device */
> + DRM_ERROR("No GuC firmware known for platform with GuC!\n");
> + i915.enable_guc_loading = 0;
Hmm, I don't like that we're modifying param outside of
intel_uc_sanitize_options()
If we split this function into fw filename selection and actual prepare/fetch
then
we could do this fw initial sanitization in proper place as:
i915.enable_guc_loading = intel_sanitize_guc_fw(dev_priv);
> + return;
> }
>
> - guc->fw.path = fw_path;
> - guc->fw.fetch_status = INTEL_UC_FIRMWARE_NONE;
> - guc->fw.load_status = INTEL_UC_FIRMWARE_NONE;
> -
> - if (fw_path == NULL)
> - return;
> - if (*fw_path == '\0')
> - return;
> -
> - guc->fw.fetch_status = INTEL_UC_FIRMWARE_PENDING;
> - DRM_DEBUG_DRIVER("GuC firmware pending, path %s\n", fw_path);
> intel_uc_prepare_fw(dev_priv, &guc->fw);
> - /* status must now be FAIL or SUCCESS */
> }
>
> /**
> diff --git a/drivers/gpu/drm/i915/intel_huc.c
> b/drivers/gpu/drm/i915/intel_huc.c
> index 6f0811c..757f618 100644
> --- a/drivers/gpu/drm/i915/intel_huc.c
> +++ b/drivers/gpu/drm/i915/intel_huc.c
> @@ -155,37 +155,29 @@ static int huc_ucode_xfer(struct drm_i915_private
> *dev_priv)
> void intel_huc_init_fw(struct intel_huc *huc)
> {
> struct drm_i915_private *dev_priv = huc_to_i915(huc);
> - 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.path = I915_SKL_HUC_UCODE;
> huc->fw.major_ver_wanted = SKL_HUC_FW_MAJOR;
> huc->fw.minor_ver_wanted = SKL_HUC_FW_MINOR;
> } else if (IS_BROXTON(dev_priv)) {
> - fw_path = I915_BXT_HUC_UCODE;
> + huc->fw.path = I915_BXT_HUC_UCODE;
> huc->fw.major_ver_wanted = BXT_HUC_FW_MAJOR;
> huc->fw.minor_ver_wanted = BXT_HUC_FW_MINOR;
> } else if (IS_KABYLAKE(dev_priv)) {
> - fw_path = I915_KBL_HUC_UCODE;
> + huc->fw.path = I915_KBL_HUC_UCODE;
> huc->fw.major_ver_wanted = KBL_HUC_FW_MAJOR;
> huc->fw.minor_ver_wanted = KBL_HUC_FW_MINOR;
> + } else {
> + DRM_ERROR("No HuC firmware known for platform with HuC!\n");
> + return;
> }
>
> - 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_prepare_fw(dev_priv, &huc->fw);
> }
>
> diff --git a/drivers/gpu/drm/i915/intel_uc.c b/drivers/gpu/drm/i915/intel_uc.c
> index 709f964..ac9ad59 100644
> --- a/drivers/gpu/drm/i915/intel_uc.c
> +++ b/drivers/gpu/drm/i915/intel_uc.c
> @@ -267,8 +267,10 @@ void intel_uc_prepare_fw(struct drm_i915_private
> *dev_priv,
> size_t size;
> int err;
>
> + uc_fw->fetch_status = INTEL_UC_FIRMWARE_PENDING;
> +
> DRM_DEBUG_DRIVER("before requesting firmware: uC fw fetch status %s\n",
> - intel_uc_fw_status_repr(uc_fw->fetch_status));
> + intel_uc_fw_status_repr(uc_fw->fetch_status));
>
> err = request_firmware(&fw, uc_fw->path, &pdev->dev);
> if (err)
I think previous patches will look simpler if you start with this patch earlier.
This move will also address some previously posted comments.
-Michal
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