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drm/i915/guc: add enable_guc_loading parameter 

Split the function of "enable_guc_submission" into two separate
options.  The new one ("enable_guc_loading") controls only the
*fetching and loading* of the GuC firmware image. The existing
one is redefined to control only the *use* of the GuC for batch
submission once the firmware is loaded.

In addition, the degree of control has been refined from a simple
bool to an integer key, allowing several options:
-1 (default)     whatever the platform default is
 0  DISABLE      don't load/use the GuC
 1  BEST EFFORT  try to load/use the GuC, fallback if not available
 2  REQUIRE      must load/use the GuC, else leave the GPU wedged

The new platform default (as coded here) will be to attempt to
load the GuC iff the device has a GuC that requires firmware,
but not yet to use it for submission. A later patch will change
to enable it if appropriate.

v4:
    Changed some error-message levels, mostly ERROR->INFO, per
    review comments by Tvrtko Ursulin.

v5:
    Dropped one more error message, disabled GuC submission on
    hypothetical firmware-free devices [Tvrtko Ursulin].

v6:
    Logging tidy by Tvrtko Ursulin:
     * Do not log falling back to execlists when wedging the GPU.
     * Do not log fw load errors when load was disabled by user.
     * Pass down some error code from fw load for log message to
       make more sense.

Signed-off-by: Dave Gordon <david.s.gordon@intel.com>
Cc: Tvrtko Ursulin <tvrtko.ursulin@linux.intel.com>
Reviewed-by: Tvrtko Ursulin <tvrtko.ursulin@intel.com> (v5)
Signed-off-by: Tvrtko Ursulin <tvrtko.ursulin@intel.com>
Tested-by: Fiedorowicz, Lukasz <lukasz.fiedorowicz@intel.com>
Signed-off-by: Dave Gordon <david.s.gordon@intel.com>
Reviewed-by: Tvrtko Ursulin <tvrtko.ursulin@intel.com> (v5)
Signed-off-by: Tvrtko Ursulin <tvrtko.ursulin@intel.com>
Reviewed-by: Nick Hoath <nicholas.hoath@intel.com> (v6)
This commit is contained in:
Dave Gordon 2016-05-20 11:42:42 +01:00 committed by Tvrtko Ursulin
parent 1a3d189837
commit fce91f22ff
5 changed files with 93 additions and 64 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

5
drivers/gpu/drm/i915/i915_gem.c
View File

@ -4885,11 +4885,8 @@ i915_gem_init_hw(struct drm_device *dev)
/* We can't enable contexts until all firmware is loaded */
if (HAS_GUC(dev)) {
ret = intel_guc_setup(dev);
if (ret) {
DRM_ERROR("Failed to initialize GuC, error %d\n", ret);
ret = -EIO;
if (ret)
goto out;
}
}
/*

4
drivers/gpu/drm/i915/i915_guc_submission.c
View File

@ -969,7 +969,7 @@ int intel_guc_suspend(struct drm_device *dev)
struct intel_context *ctx;
u32 data[3];
if (!i915.enable_guc_submission)
if (guc->guc_fw.guc_fw_load_status != GUC_FIRMWARE_SUCCESS)
return 0;
ctx = dev_priv->kernel_context;
@ -995,7 +995,7 @@ int intel_guc_resume(struct drm_device *dev)
struct intel_context *ctx;
u32 data[3];
if (!i915.enable_guc_submission)
if (guc->guc_fw.guc_fw_load_status != GUC_FIRMWARE_SUCCESS)
return 0;
ctx = dev_priv->kernel_context;

14
drivers/gpu/drm/i915/i915_params.c
View File

@ -53,7 +53,8 @@ struct i915_params i915 __read_mostly = {
.verbose_state_checks = 1,
.nuclear_pageflip = 0,
.edp_vswing = 0,
.enable_guc_submission = false,
.enable_guc_loading = -1,
.enable_guc_submission = 0,
.guc_log_level = -1,
.enable_dp_mst = true,
.inject_load_failure = 0,
@ -193,8 +194,15 @@ MODULE_PARM_DESC(edp_vswing,
"(0=use value from vbt [default], 1=low power swing(200mV),"
"2=default swing(400mV))");
module_param_named_unsafe(enable_guc_submission, i915.enable_guc_submission, bool, 0400);
MODULE_PARM_DESC(enable_guc_submission, "Enable GuC submission (default:false)");
module_param_named_unsafe(enable_guc_loading, i915.enable_guc_loading, int, 0400);
MODULE_PARM_DESC(enable_guc_loading,
"Enable GuC firmware loading "
"(-1=auto [default], 0=never, 1=if available, 2=required)");
module_param_named_unsafe(enable_guc_submission, i915.enable_guc_submission, int, 0400);
MODULE_PARM_DESC(enable_guc_submission,
"Enable GuC submission "
"(-1=auto, 0=never [default], 1=if available, 2=required)");
module_param_named(guc_log_level, i915.guc_log_level, int, 0400);
MODULE_PARM_DESC(guc_log_level,

3
drivers/gpu/drm/i915/i915_params.h
View File

@ -45,6 +45,8 @@ struct i915_params {
int enable_ips;
int invert_brightness;
int enable_cmd_parser;
int enable_guc_loading;
int enable_guc_submission;
int guc_log_level;
int mmio_debug;
int edp_vswing;
@ -56,7 +58,6 @@ struct i915_params {
bool load_detect_test;
bool reset;
bool disable_display;
bool enable_guc_submission;
bool verbose_state_checks;
bool nuclear_pageflip;
bool enable_dp_mst;

131
drivers/gpu/drm/i915/intel_guc_loader.c
View File

@ -402,50 +402,42 @@ int intel_guc_setup(struct drm_device *dev)
{
struct drm_i915_private *dev_priv = dev->dev_private;
struct intel_guc_fw *guc_fw = &dev_priv->guc.guc_fw;
int retries, err = 0;
const char *fw_path = guc_fw->guc_fw_path;
int retries, ret, err;
if (!i915.enable_guc_submission)
return 0;
DRM_DEBUG_DRIVER("GuC fw status: path %s, fetch %s, load %s\n",
fw_path,
intel_guc_fw_status_repr(guc_fw->guc_fw_fetch_status),
intel_guc_fw_status_repr(guc_fw->guc_fw_load_status));
/* Loading forbidden, or no firmware to load? */
if (!i915.enable_guc_loading) {
err = 0;
goto fail;
} else if (fw_path == NULL || *fw_path == '\0') {
if (*fw_path == '\0')
DRM_INFO("No GuC firmware known for this platform\n");
err = -ENODEV;
goto fail;
}
/* Fetch failed, or already fetched but failed to load? */
if (guc_fw->guc_fw_fetch_status != GUC_FIRMWARE_SUCCESS) {
err = -EIO;
goto fail;
} else if (guc_fw->guc_fw_load_status == GUC_FIRMWARE_FAIL) {
err = -ENOEXEC;
goto fail;
}
direct_interrupts_to_host(dev_priv);
guc_fw->guc_fw_load_status = GUC_FIRMWARE_PENDING;
DRM_DEBUG_DRIVER("GuC fw status: fetch %s, load %s\n",
intel_guc_fw_status_repr(guc_fw->guc_fw_fetch_status),
intel_guc_fw_status_repr(guc_fw->guc_fw_load_status));
direct_interrupts_to_host(dev_priv);
if (guc_fw->guc_fw_fetch_status == GUC_FIRMWARE_NONE)
return 0;
if (guc_fw->guc_fw_fetch_status == GUC_FIRMWARE_SUCCESS &&
guc_fw->guc_fw_load_status == GUC_FIRMWARE_FAIL)
return -ENOEXEC;
guc_fw->guc_fw_load_status = GUC_FIRMWARE_PENDING;
DRM_DEBUG_DRIVER("GuC fw fetch status %s\n",
intel_guc_fw_status_repr(guc_fw->guc_fw_fetch_status));
switch (guc_fw->guc_fw_fetch_status) {
case GUC_FIRMWARE_FAIL:
/* something went wrong :( */
err = -EIO;
goto fail;
case GUC_FIRMWARE_NONE:
case GUC_FIRMWARE_PENDING:
default:
/* "can't happen" */
WARN_ONCE(1, "GuC fw %s invalid guc_fw_fetch_status %s [%d]\n",
guc_fw->guc_fw_path,
intel_guc_fw_status_repr(guc_fw->guc_fw_fetch_status),
guc_fw->guc_fw_fetch_status);
err = -ENXIO;
goto fail;
case GUC_FIRMWARE_SUCCESS:
break;
}
err = i915_guc_submission_init(dev);
if (err)
goto fail;
@ -463,7 +455,7 @@ int intel_guc_setup(struct drm_device *dev)
*/
err = i915_reset_guc(dev_priv);
if (err) {
DRM_ERROR("GuC reset failed, err %d\n", err);
DRM_ERROR("GuC reset failed: %d\n", err);
goto fail;
}
@ -474,8 +466,8 @@ int intel_guc_setup(struct drm_device *dev)
if (--retries == 0)
goto fail;
DRM_INFO("GuC fw load failed, err %d; will reset and "
"retry %d more time(s)\n", err, retries);
DRM_INFO("GuC fw load failed: %d; will reset and "
"retry %d more time(s)\n", err, retries);
}
guc_fw->guc_fw_load_status = GUC_FIRMWARE_SUCCESS;
@ -497,7 +489,6 @@ int intel_guc_setup(struct drm_device *dev)
return 0;
fail:
DRM_ERROR("GuC firmware load failed, err %d\n", err);
if (guc_fw->guc_fw_load_status == GUC_FIRMWARE_PENDING)
guc_fw->guc_fw_load_status = GUC_FIRMWARE_FAIL;
@ -505,7 +496,41 @@ int intel_guc_setup(struct drm_device *dev)
i915_guc_submission_disable(dev);
i915_guc_submission_fini(dev);
return err;
/*
* 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).
*/
if (i915.enable_guc_loading > 1) {
ret = -EIO;
} else if (i915.enable_guc_submission > 1) {
ret = -EIO;
} else {
ret = 0;
}
if (err == 0)
DRM_INFO("GuC firmware load skipped\n");
else if (ret == -EIO)
DRM_ERROR("GuC firmware load failed: %d\n", err);
else
DRM_INFO("GuC firmware load failed: %d\n", err);
if (i915.enable_guc_submission) {
if (fw_path == NULL)
DRM_INFO("GuC submission without firmware not supported\n");
if (ret == 0)
DRM_INFO("Falling back to execlist mode\n");
else
DRM_ERROR("GuC init failed: %d\n", ret);
}
i915.enable_guc_submission = 0;
return ret;
}
static void guc_fw_fetch(struct drm_device *dev, struct intel_guc_fw *guc_fw)
@ -644,8 +669,11 @@ void intel_guc_init(struct drm_device *dev)
struct intel_guc_fw *guc_fw = &dev_priv->guc.guc_fw;
const char *fw_path;
if (!HAS_GUC_SCHED(dev))
i915.enable_guc_submission = false;
/* A negative value means "use platform default" */
if (i915.enable_guc_loading < 0)
i915.enable_guc_loading = HAS_GUC_UCODE(dev);
if (i915.enable_guc_submission < 0)
i915.enable_guc_submission = HAS_GUC_SCHED(dev);
if (!HAS_GUC_UCODE(dev)) {
fw_path = NULL;
@ -658,26 +686,21 @@ void intel_guc_init(struct drm_device *dev)
guc_fw->guc_fw_major_wanted = 8;
guc_fw->guc_fw_minor_wanted = 7;
} else {
i915.enable_guc_submission = false;
fw_path = ""; /* unknown device */
}
if (!i915.enable_guc_submission)
return;
guc_fw->guc_dev = dev;
guc_fw->guc_fw_path = fw_path;
guc_fw->guc_fw_fetch_status = GUC_FIRMWARE_NONE;
guc_fw->guc_fw_load_status = GUC_FIRMWARE_NONE;
/* Early (and silent) return if GuC loading is disabled */
if (!i915.enable_guc_loading)
return;
if (fw_path == NULL)
return;
if (*fw_path == '\0') {
DRM_ERROR("No GuC firmware known for this platform\n");
guc_fw->guc_fw_fetch_status = GUC_FIRMWARE_FAIL;
if (*fw_path == '\0')
return;
}
guc_fw->guc_fw_fetch_status = GUC_FIRMWARE_PENDING;
DRM_DEBUG_DRIVER("GuC firmware pending, path %s\n", fw_path);