drm/i915/guc: Combine enable_guc_loading|submission modparams
We currently have two module parameters that control GuC:
"enable_guc_loading" and "enable_guc_submission". Whenever
we need submission=1, we also need loading=1. We also need
loading=1 when we want to want to load and verify the HuC.
Lets combine above module parameters into one "enable_guc"
modparam. New supported bit values are:
0=disable GuC (no GuC submission, no HuC)
1=enable GuC submission
2=enable HuC load
Special value "-1" can be used to let driver decide what
option should be enabled for given platform based on
hardware/firmware availability or preference.
Explicit enabling any of the GuC features makes GuC load
a required step, fallback to non-GuC mode will not be
supported.
v2: Don't use -EIO
v3: define modparam bits (Chris)
v4: rely on implicit cast (Chris)
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>
Cc: Sujaritha Sundaresan <sujaritha.sundaresan@intel.com>
Reviewed-by: Chris Wilson <chris@chris-wilson.co.uk>
Signed-off-by: Chris Wilson <chris@chris-wilson.co.uk>
Link: https://patchwork.freedesktop.org/patch/msgid/20171206135316.32556-6-michal.wajdeczko@intel.com
diff --git a/drivers/gpu/drm/i915/intel_uc.c b/drivers/gpu/drm/i915/intel_uc.c
index c3981aa..7dfc7e0 100644
--- a/drivers/gpu/drm/i915/intel_uc.c
+++ b/drivers/gpu/drm/i915/intel_uc.c
@@ -47,35 +47,65 @@ static int __intel_uc_reset_hw(struct drm_i915_private *dev_priv)
return ret;
}
+static int __get_platform_enable_guc(struct drm_i915_private *dev_priv)
+{
+ struct intel_uc_fw *guc_fw = &dev_priv->guc.fw;
+ struct intel_uc_fw *huc_fw = &dev_priv->huc.fw;
+ int enable_guc = 0;
+
+ /* Default is to enable GuC/HuC if we know their firmwares */
+ if (intel_uc_fw_is_selected(guc_fw))
+ enable_guc |= ENABLE_GUC_SUBMISSION;
+ if (intel_uc_fw_is_selected(huc_fw))
+ enable_guc |= ENABLE_GUC_LOAD_HUC;
+
+ /* Any platform specific fine-tuning can be done here */
+
+ return enable_guc;
+}
+
+/**
+ * intel_uc_sanitize_options - sanitize uC related modparam options
+ * @dev_priv: device private
+ *
+ * In case of "enable_guc" option this function will attempt to modify
+ * it only if it was initially set to "auto(-1)". Default value for this
+ * modparam varies between platforms and it is hardcoded in driver code.
+ * Any other modparam value is only monitored against availability of the
+ * related hardware or firmware definitions.
+ */
void intel_uc_sanitize_options(struct drm_i915_private *dev_priv)
{
- if (!HAS_GUC(dev_priv)) {
- if (i915_modparams.enable_guc_loading > 0 ||
- i915_modparams.enable_guc_submission > 0)
- DRM_INFO("Ignoring GuC options, no hardware\n");
-
- i915_modparams.enable_guc_loading = 0;
- i915_modparams.enable_guc_submission = 0;
- return;
- }
+ struct intel_uc_fw *guc_fw = &dev_priv->guc.fw;
+ struct intel_uc_fw *huc_fw = &dev_priv->huc.fw;
/* A negative value means "use platform default" */
- if (i915_modparams.enable_guc_loading < 0)
- i915_modparams.enable_guc_loading = HAS_GUC_UCODE(dev_priv);
+ if (i915_modparams.enable_guc < 0)
+ i915_modparams.enable_guc = __get_platform_enable_guc(dev_priv);
- /* Verify firmware version */
- if (i915_modparams.enable_guc_loading) {
- if (!intel_uc_fw_is_selected(&dev_priv->guc.fw))
- i915_modparams.enable_guc_loading = 0;
+ DRM_DEBUG_DRIVER("enable_guc=%d (submission:%s huc:%s)\n",
+ i915_modparams.enable_guc,
+ yesno(intel_uc_is_using_guc_submission()),
+ yesno(intel_uc_is_using_huc()));
+
+ /* Verify GuC firmware availability */
+ if (intel_uc_is_using_guc() && !intel_uc_fw_is_selected(guc_fw)) {
+ DRM_WARN("Incompatible option detected: enable_guc=%d, %s!\n",
+ i915_modparams.enable_guc,
+ !HAS_GUC(dev_priv) ? "no GuC hardware" :
+ "no GuC firmware");
}
- /* Can't enable guc submission without guc loaded */
- if (!i915_modparams.enable_guc_loading)
- i915_modparams.enable_guc_submission = 0;
+ /* Verify HuC firmware availability */
+ if (intel_uc_is_using_huc() && !intel_uc_fw_is_selected(huc_fw)) {
+ DRM_WARN("Incompatible option detected: enable_guc=%d, %s!\n",
+ i915_modparams.enable_guc,
+ !HAS_HUC(dev_priv) ? "no HuC hardware" :
+ "no HuC firmware");
+ }
- /* A negative value means "use platform default" */
- if (i915_modparams.enable_guc_submission < 0)
- i915_modparams.enable_guc_submission = HAS_GUC_SCHED(dev_priv);
+ /* Make sure that sanitization was done */
+ GEM_BUG_ON(i915_modparams.enable_guc < 0);
}
void intel_uc_init_early(struct drm_i915_private *dev_priv)
@@ -161,6 +191,11 @@ int intel_uc_init_hw(struct drm_i915_private *dev_priv)
if (!USES_GUC(dev_priv))
return 0;
+ if (!HAS_GUC(dev_priv)) {
+ ret = -ENODEV;
+ goto err_out;
+ }
+
guc_disable_communication(guc);
gen9_reset_guc_interrupts(dev_priv);
@@ -235,12 +270,6 @@ int intel_uc_init_hw(struct drm_i915_private *dev_priv)
/*
* We've failed to load the firmware :(
- *
- * Decide whether to disable GuC submission and fall back to
- * execlist mode, and whether to hide the error by returning
- * zero or to return -EIO, which the caller will treat as a
- * nonfatal error (i.e. it doesn't prevent driver load, but
- * marks the GPU as wedged until reset).
*/
err_interrupts:
guc_disable_communication(guc);
@@ -252,23 +281,15 @@ int intel_uc_init_hw(struct drm_i915_private *dev_priv)
intel_guc_submission_fini(guc);
err_guc:
i915_ggtt_disable_guc(dev_priv);
+err_out:
+ /*
+ * Note that there is no fallback as either user explicitly asked for
+ * the GuC or driver default option was to run with the GuC enabled.
+ */
+ if (GEM_WARN_ON(ret == -EIO))
+ ret = -EINVAL;
- if (i915_modparams.enable_guc_loading > 1 ||
- i915_modparams.enable_guc_submission > 1) {
- DRM_ERROR("GuC init failed. Firmware loading disabled.\n");
- ret = -EIO;
- } else {
- DRM_NOTE("GuC init failed. Firmware loading disabled.\n");
- ret = 0;
- }
-
- if (USES_GUC_SUBMISSION(dev_priv)) {
- i915_modparams.enable_guc_submission = 0;
- DRM_NOTE("Falling back from GuC submission to execlist mode\n");
- }
-
- i915_modparams.enable_guc_loading = 0;
-
+ dev_err(dev_priv->drm.dev, "GuC initialization failed %d\n", ret);
return ret;
}