On 15/12/2016 15:47, Arkadiusz Hiler wrote:
Current version of intel_guc_load() does a lot:
- cares about submission
- loads huc
Not yet, no? So instead you could say that you are preparing the
groundworks to make adding in the HuC fit better.
- implement WA
This change offloads some of the logic to intel_uc_load(), which now
cares about the above.
Cc: Anusha Srivatsa <anusha.srivatsa@xxxxxxxxx>
Cc: Jeff McGee <jeff.mcgee@xxxxxxxxx>
Cc: Michal Winiarski <michal.winiarski@xxxxxxxxx>
Signed-off-by: Arkadiusz Hiler <arkadiusz.hiler@xxxxxxxxx>
---
drivers/gpu/drm/i915/i915_gem.c | 2 +-
drivers/gpu/drm/i915/intel_guc_loader.c | 126 +++++---------------------------
drivers/gpu/drm/i915/intel_uc.c | 83 +++++++++++++++++++++
drivers/gpu/drm/i915/intel_uc.h | 8 ++
4 files changed, 110 insertions(+), 109 deletions(-)
diff --git a/drivers/gpu/drm/i915/i915_gem.c b/drivers/gpu/drm/i915/i915_gem.c
index 6af4e85..76b52c6 100644
--- a/drivers/gpu/drm/i915/i915_gem.c
+++ b/drivers/gpu/drm/i915/i915_gem.c
@@ -4412,7 +4412,7 @@ i915_gem_init_hw(struct drm_i915_private *dev_priv)
intel_mocs_init_l3cc_table(dev_priv);
/* We can't enable contexts until all firmware is loaded */
- ret = intel_guc_load(dev_priv);
+ ret = intel_uc_load(dev_priv);
if (ret)
goto out;
diff --git a/drivers/gpu/drm/i915/intel_guc_loader.c b/drivers/gpu/drm/i915/intel_guc_loader.c
index f8b28b1..b76b556 100644
--- a/drivers/gpu/drm/i915/intel_guc_loader.c
+++ b/drivers/gpu/drm/i915/intel_guc_loader.c
@@ -97,7 +97,7 @@ const char *intel_guc_fw_status_repr(enum intel_guc_fw_status status)
}
};
-static void guc_interrupts_release(struct drm_i915_private *dev_priv)
+void guc_interrupts_release(struct drm_i915_private *dev_priv)
{
struct intel_engine_cs *engine;
enum intel_engine_id id;
@@ -115,7 +115,7 @@ static void guc_interrupts_release(struct drm_i915_private *dev_priv)
I915_WRITE(GUC_WD_VECS_IER, 0);
}
-static void guc_interrupts_capture(struct drm_i915_private *dev_priv)
+void guc_interrupts_capture(struct drm_i915_private *dev_priv)
{
struct intel_engine_cs *engine;
enum intel_engine_id id;
@@ -334,7 +334,7 @@ static int guc_ucode_xfer_dma(struct drm_i915_private *dev_priv,
return ret;
}
-static u32 guc_wopcm_size(struct drm_i915_private *dev_priv)
+u32 guc_wopcm_size(struct drm_i915_private *dev_priv)
{
u32 wopcm_size = GUC_WOPCM_TOP;
@@ -417,7 +417,7 @@ static int guc_ucode_xfer(struct drm_i915_private *dev_priv)
return ret;
}
-static int guc_hw_reset(struct drm_i915_private *dev_priv)
+int guc_hw_reset(struct drm_i915_private *dev_priv)
{
int ret;
u32 guc_status;
@@ -452,75 +452,37 @@ int intel_guc_load(struct drm_i915_private *dev_priv)
{
struct intel_guc_fw *guc_fw = &dev_priv->guc.guc_fw;
const char *fw_path = guc_fw->guc_fw_path;
- int retries, ret, err;
+ int ret;
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) {
+ if (fw_path == NULL) {
/* Device is known to have no uCode (e.g. no GuC) */
- err = -ENXIO;
- goto fail;
+ return -ENXIO;
} else if (*fw_path == '\0') {
/* Device has a GuC but we don't know what f/w to load? */
WARN(1, "No GuC firmware known for this platform!\n");
- err = -ENODEV;
- goto fail;
+ return -ENODEV;
}
/* Fetch failed, or already fetched but failed to load? */
if (guc_fw->guc_fw_fetch_status != GUC_FIRMWARE_SUCCESS) {
- err = -EIO;
- goto fail;
+ return -EIO;
} else if (guc_fw->guc_fw_load_status == GUC_FIRMWARE_FAIL) {
- err = -ENOEXEC;
- goto fail;
+ return -ENOEXEC;
}
- guc_interrupts_release(dev_priv);
- gen9_reset_guc_interrupts(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));
-
- err = i915_guc_submission_init(dev_priv);
- if (err)
- goto fail;
-
- /*
- * WaEnableuKernelHeaderValidFix:skl,bxt
- * For BXT, this is only upto B0 but below WA is required for later
- * steppings also so this is extended as well.
- */
/* WaEnableGuCBootHashCheckNotSet:skl,bxt */
- for (retries = 3; ; ) {
- /*
- * Always reset the GuC just before (re)loading, so
- * that the state and timing are fairly predictable
- */
- err = guc_hw_reset(dev_priv);
- if (err)
- goto fail;
+ /* we may want to retry guc ucode transfer */
+ ret = guc_ucode_xfer(dev_priv);
- err = guc_ucode_xfer(dev_priv);
- if (!err)
- break;
-
- if (--retries == 0)
- goto fail;
-
- DRM_INFO("GuC fw load failed: %d; will reset and "
- "retry %d more time(s)\n", err, retries);
- }
+ if (ret)
+ return -EAGAIN;
guc_fw->guc_fw_load_status = GUC_FIRMWARE_SUCCESS;
@@ -528,63 +490,7 @@ int intel_guc_load(struct drm_i915_private *dev_priv)
intel_guc_fw_status_repr(guc_fw->guc_fw_fetch_status),
intel_guc_fw_status_repr(guc_fw->guc_fw_load_status));
- if (i915.enable_guc_submission) {
- if (i915.guc_log_level >= 0)
- gen9_enable_guc_interrupts(dev_priv);
-
- err = i915_guc_submission_enable(dev_priv);
- if (err)
- goto fail;
- guc_interrupts_capture(dev_priv);
- }
-
return 0;
-
-fail:
- if (guc_fw->guc_fw_load_status == GUC_FIRMWARE_PENDING)
- guc_fw->guc_fw_load_status = GUC_FIRMWARE_FAIL;
You seem to have lost this state transition at least in the
enable_guc_loading = 0 case. Was that deliberate? I have no idea if that
is important so just an observation.
-
- guc_interrupts_release(dev_priv);
- i915_guc_submission_disable(dev_priv);
- i915_guc_submission_fini(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).
- */
- if (i915.enable_guc_loading > 1) {
- ret = -EIO;
- } else if (i915.enable_guc_submission > 1) {
- ret = -EIO;
- } else {
- ret = 0;
- }
-
- if (err == 0 && !HAS_GUC_UCODE(dev_priv))
- ; /* Don't mention the GuC! */
- else if (err == 0)
- DRM_INFO("GuC firmware load skipped\n");
- else if (ret != -EIO)
- DRM_NOTE("GuC firmware load failed: %d\n", err);
- else
- DRM_WARN("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_NOTE("Falling back from GuC submission 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_i915_private *dev_priv,
@@ -757,6 +663,10 @@ void intel_guc_init(struct drm_i915_private *dev_priv)
guc_fw->guc_fw_fetch_status = GUC_FIRMWARE_NONE;
guc_fw->guc_fw_load_status = GUC_FIRMWARE_NONE;
+ /* can't enable guc submission without guc */
+ if (!i915.enable_guc_loading)
+ i915.enable_guc_submission = 0;
+
/* Early (and silent) return if GuC loading is disabled */
if (!i915.enable_guc_loading)
return;
You got two same conditions one after another, maybe merge them?
diff --git a/drivers/gpu/drm/i915/intel_uc.c b/drivers/gpu/drm/i915/intel_uc.c
index 8eec035..4e184edb 100644
--- a/drivers/gpu/drm/i915/intel_uc.c
+++ b/drivers/gpu/drm/i915/intel_uc.c
@@ -35,6 +35,89 @@ void intel_uc_init(struct drm_i915_private *dev_priv)
intel_guc_init(dev_priv);
}
+int intel_uc_load(struct drm_i915_private *dev_priv)
+{
+ struct intel_guc_fw *guc_fw = &dev_priv->guc.guc_fw;
+ int ret, retries;
+
+ /* guc not enabled, nothing to do */
+ if (!i915.enable_guc_loading)
+ return 0;
+
+ guc_interrupts_release(dev_priv);
+ gen9_reset_guc_interrupts(dev_priv);
+
+ guc_fw->guc_fw_load_status = GUC_FIRMWARE_PENDING;
+
+ if (i915.enable_guc_submission) {
+ ret = i915_guc_submission_init(dev_priv);
+ if (ret)
+ goto fail;
+ }
+
+ /* WaEnableGuCBootHashCheckNotSet:skl,bxt */
+ retries = GUC_WA_HASH_CHECK_NOT_SET_ATTEPMTS;
+ while (retries--) {
+ /*
+ * Always reset the GuC just before (re)loading, so
+ * that the state and timing are fairly predictable
+ */
+ ret = guc_hw_reset(dev_priv);
+ if (ret)
+ goto fail;
+
+ ret = intel_guc_load(dev_priv);
+ if (ret == 0 || ret != -EAGAIN)
+ break;
+
+ DRM_INFO("GuC fw load failed: %d; will reset and "
+ "retry %d more time(s)\n", ret, retries);
+ }
+
+ /* did we succeded or run out of retries? */
"Have we succeeded" I think.
+ if (ret)
+ goto fail;
There was a debug message round about here I think which logged that the
firmware was successfully loaded. I think it is good to have it. I think
even logging the major and minor would be good and maybe even at
informational level?
+
+ if (i915.enable_guc_submission) {
+ if (i915.guc_log_level >= 0)
+ gen9_enable_guc_interrupts(dev_priv);
+
+ ret = i915_guc_submission_enable(dev_priv);
+ if (ret)
+ goto fail;
+ guc_interrupts_capture(dev_priv);
+ }
+
+ return 0;
+
+fail:
+ /*
+ * 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 || i915.enable_guc_submission > 1)
+ ret = -EIO;
+ else
+ ret = 0;
+
+ if (i915.enable_guc_submission) {
+ i915.enable_guc_submission = 0;
+ DRM_INFO("GuC submission without firmware not supported\n");
+ DRM_NOTE("Falling back from GuC submission to execlist mode\n");
+ }
+
+ guc_interrupts_release(dev_priv);
+ i915_guc_submission_disable(dev_priv);
+ i915_guc_submission_fini(dev_priv);
+
+ return ret;
+}
+
/*
* Read GuC command/status register (SOFT_SCRATCH_0)
* Return true if it contains a response rather than a command
diff --git a/drivers/gpu/drm/i915/intel_uc.h b/drivers/gpu/drm/i915/intel_uc.h
index ec1a5b2..89c7e1f 100644
--- a/drivers/gpu/drm/i915/intel_uc.h
+++ b/drivers/gpu/drm/i915/intel_uc.h
@@ -28,6 +28,9 @@
#include "i915_guc_reg.h"
#include "intel_ringbuffer.h"
+/* WaEnableGuCBootHashCheckNotSet:skl,bxt */
+#define GUC_WA_HASH_CHECK_NOT_SET_ATTEPMTS 3
+
struct drm_i915_gem_request;
/*
@@ -171,6 +174,7 @@ struct intel_guc {
/* intel_uc.c */
void intel_uc_init_early(struct drm_i915_private *dev_priv);
void intel_uc_init(struct drm_i915_private *dev_priv);
+int intel_uc_load(struct drm_i915_private *dev_priv);
bool intel_guc_recv(struct drm_i915_private *dev_priv, u32 *status);
int intel_guc_send(struct intel_guc *guc, const u32 *action, u32 len);
int intel_guc_sample_forcewake(struct intel_guc *guc);
@@ -185,6 +189,10 @@ extern void intel_guc_fini(struct drm_i915_private *dev_priv);
extern const char *intel_guc_fw_status_repr(enum intel_guc_fw_status status);
extern int intel_guc_suspend(struct drm_i915_private *dev_priv);
extern int intel_guc_resume(struct drm_i915_private *dev_priv);
+void guc_interrupts_release(struct drm_i915_private *dev_priv);
+void guc_interrupts_capture(struct drm_i915_private *dev_priv);
+int guc_hw_reset(struct drm_i915_private *dev_priv);
+u32 guc_wopcm_size(struct drm_i915_private *dev_priv);
/* i915_guc_submission.c */
int i915_guc_submission_init(struct drm_i915_private *dev_priv);
I was just reading it so I can review 5/5 as you have asked me to look
at that one.
Regards,
Tvrtko
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