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
Signed-off-by: Michal Wajdeczko <michal.wajdec...@intel.com>
Cc: Chris Wilson <ch...@chris-wilson.co.uk>
Cc: Joonas Lahtinen <joonas.lahti...@linux.intel.com>
Cc: Sagar Arun Kamble <sagar.a.kam...@intel.com>
Cc: Sujaritha Sundaresan <sujaritha.sundare...@intel.com>
---
drivers/gpu/drm/i915/i915_drv.h | 5 +-
drivers/gpu/drm/i915/i915_params.c | 11 ++--
drivers/gpu/drm/i915/i915_params.h | 3 +-
drivers/gpu/drm/i915/intel_uc.c | 100 +++++++++++++++++++++----------------
4 files changed, 65 insertions(+), 54 deletions(-)
diff --git a/drivers/gpu/drm/i915/i915_drv.h b/drivers/gpu/drm/i915/i915_drv.h
index 2c386c7..9162a60 100644
--- a/drivers/gpu/drm/i915/i915_drv.h
+++ b/drivers/gpu/drm/i915/i915_drv.h
@@ -3238,8 +3238,9 @@ intel_info(const struct drm_i915_private *dev_priv)
#define HAS_HUC_UCODE(dev_priv) (HAS_GUC(dev_priv))
/* Having a GuC is not the same as using a GuC */
-#define USES_GUC(dev_priv) (i915_modparams.enable_guc_loading)
-#define USES_GUC_SUBMISSION(dev_priv) (i915_modparams.enable_guc_submission)
+#define USES_GUC(dev_priv) (!!(i915_modparams.enable_guc > 0))
+#define USES_GUC_SUBMISSION(dev_priv) (!!(i915_modparams.enable_guc & 1))
+#define USES_HUC(dev_priv) (!!(i915_modparams.enable_guc & 2))
#define HAS_RESOURCE_STREAMER(dev_priv)
((dev_priv)->info.has_resource_streamer)
diff --git a/drivers/gpu/drm/i915/i915_params.c
b/drivers/gpu/drm/i915/i915_params.c
index 3328147..8654e45 100644
--- a/drivers/gpu/drm/i915/i915_params.c
+++ b/drivers/gpu/drm/i915/i915_params.c
@@ -154,13 +154,10 @@ i915_param_named_unsafe(edp_vswing, int, 0400,
"(0=use value from vbt [default], 1=low power swing(200mV),"
"2=default swing(400mV))");
-i915_param_named_unsafe(enable_guc_loading, int, 0400,
- "Enable GuC firmware loading "
- "(-1=auto, 0=never [default], 1=if available, 2=required)");
-
-i915_param_named_unsafe(enable_guc_submission, int, 0400,
- "Enable GuC submission "
- "(-1=auto, 0=never [default], 1=if available, 2=required)");
+i915_param_named_unsafe(enable_guc, int, 0400,
+ "Enable GuC load for GuC submission and/or HuC load. "
+ "Required functionality can be selected using bitmask values. "
+ "(-1=auto, 0=disable [default], 1=GuC submission, 2=HuC load)");
i915_param_named(guc_log_level, int, 0400,
"GuC firmware logging level (-1:disabled (default), 0-3:enabled)");
diff --git a/drivers/gpu/drm/i915/i915_params.h
b/drivers/gpu/drm/i915/i915_params.h
index 8321bd8..10e2f74 100644
--- a/drivers/gpu/drm/i915/i915_params.h
+++ b/drivers/gpu/drm/i915/i915_params.h
@@ -42,8 +42,7 @@
param(int, disable_power_well, -1) \
param(int, enable_ips, 1) \
param(int, invert_brightness, 0) \
- param(int, enable_guc_loading, 0) \
- param(int, enable_guc_submission, 0) \
+ param(int, enable_guc, 0) \
param(int, guc_log_level, -1) \
param(char *, guc_firmware_path, NULL) \
param(char *, huc_firmware_path, NULL) \
diff --git a/drivers/gpu/drm/i915/intel_uc.c b/drivers/gpu/drm/i915/intel_uc.c
index ed2dd76..8a761af 100644
--- a/drivers/gpu/drm/i915/intel_uc.c
+++ b/drivers/gpu/drm/i915/intel_uc.c
@@ -47,35 +47,59 @@ static int __intel_uc_reset_hw(struct drm_i915_private
*dev_priv)
return ret;
}
-void intel_uc_sanitize_options(struct drm_i915_private *dev_priv)
+static int __get_default_enable_guc(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");
+ struct intel_uc_fw *guc_fw = &dev_priv->guc.fw;
+ struct intel_uc_fw *huc_fw = &dev_priv->huc.fw;
+ /* Default is to enable GuC/HuC if we know their firmwares */
+ int enable_guc = (intel_uc_fw_is_selected(guc_fw) ? 1 : 0) |
+ (intel_uc_fw_is_selected(huc_fw) ? 2 : 0);
- i915_modparams.enable_guc_loading = 0;
- i915_modparams.enable_guc_submission = 0;
- return;
- }
+ /* Any platform specific fine-tuning can be done here */
- /* A negative value means "use platform default" */
- if (i915_modparams.enable_guc_loading < 0)
- i915_modparams.enable_guc_loading = HAS_GUC_UCODE(dev_priv);
+ /* Make sure that our "platform default" is well-defined */
+ GEM_BUG_ON(enable_guc < 0);
+ GEM_BUG_ON((enable_guc > 0) && !intel_uc_fw_is_selected(guc_fw));
+ GEM_BUG_ON((enable_guc & 2) && !intel_uc_fw_is_selected(huc_fw));
- /* 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;
- }
+ return enable_guc;
+}
- /* Can't enable guc submission without guc loaded */
- if (!i915_modparams.enable_guc_loading)
- i915_modparams.enable_guc_submission = 0;
+/**
+ * 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)
+{
+ struct intel_uc_fw *guc_fw = &dev_priv->guc.fw;
+ struct intel_uc_fw *huc_fw = &dev_priv->huc.fw;
+ int enable_guc = __get_default_enable_guc(dev_priv);
/* A negative value means "use platform default" */
- if (i915_modparams.enable_guc_submission < 0)
- i915_modparams.enable_guc_submission = HAS_GUC_SCHED(dev_priv);
+ if (i915_modparams.enable_guc < 0)
+ i915_modparams.enable_guc = enable_guc;
+
+ /* Verify GuC firmware availability */
+ if (USES_GUC(dev_priv) && !intel_uc_fw_is_selected(guc_fw)) {
+ DRM_WARN("Incompatible option enable_guc=%d - %s\n",
+ i915_modparams.enable_guc,
+ !HAS_GUC(dev_priv) ? "no GuC hardware" :
+ "no GuC firmware");
+ }
+
+ /* Verify HuC firmware availability */
+ if (USES_GUC_SUBMISSION(dev_priv) && !intel_uc_fw_is_selected(huc_fw)) {
+ DRM_WARN("Incompatible option enable_guc=%d - %s\n",
+ i915_modparams.enable_guc,
+ !HAS_HUC(dev_priv) ? "no HuC hardware" :
+ "no HuC firmware");
+ }
}
void intel_uc_init_early(struct drm_i915_private *dev_priv)
@@ -155,6 +179,10 @@ int intel_uc_init_hw(struct drm_i915_private *dev_priv)
if (!USES_GUC(dev_priv))
return 0;
+ /* Late trap for incompatible modparam option */
+ if (!HAS_GUC(dev_priv))
+ return -ENODEV;
+
guc_disable_communication(guc);
gen9_reset_guc_interrupts(dev_priv);
@@ -229,12 +257,6 @@ 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);
@@ -247,22 +269,14 @@ int intel_uc_init_hw(struct drm_i915_private *dev_priv)
err_guc:
i915_ggtt_disable_guc(dev_priv);
- 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.\n");
+ /*
+ * There is no fallback as either user explicitly asked for the GuC
+ * or driver default was to run with GuC enabled.
+ */
+ if (GEM_WARN_ON(ret == -EIO))
+ return -EINVAL;
return ret;
}
--
2.7.4
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