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drm/i915/guc: Combine enable_guc_loading|submission modparams

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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
This commit is contained in:
Michal Wajdeczko
2017-12-06 13:53:15 +00:00
committed by Chris Wilson
parent 8620eb1dbb
commit 121981fafe
5 changed files with 95 additions and 54 deletions
Download Patch File Download Diff File Expand all files Collapse all files

107
drivers/gpu/drm/i915/intel_uc.c
View File

@@ -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 @@ err_submission:
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;
}