On 2/27/2018 6:22 PM, Michał Winiarski wrote:
Those two concepts are really separate. Since GuC is writing data into
its own buffer and we even provide a way for userspace to read directly
from it using i915_guc_log_dump debugfs, there's no real reason to tie
log level with relay creation.
Let's create a separate debugfs, giving userspace a way to create a
relay on demand, when it wants to read a continuous log rather than a
snapshot.
Signed-off-by: Michał Winiarski <michal.winiarski@xxxxxxxxx>
Cc: Chris Wilson <chris@xxxxxxxxxxxxxxxxxx>
Cc: Daniele Ceraolo Spurio <daniele.ceraolospurio@xxxxxxxxx>
Cc: Sagar Arun Kamble <sagar.a.kamble@xxxxxxxxx>
Cc: Michal Wajdeczko <michal.wajdeczko@xxxxxxxxx>
---
drivers/gpu/drm/i915/i915_debugfs.c | 56 ++++++++++++++++++++++----
drivers/gpu/drm/i915/i915_drv.c | 2 -
drivers/gpu/drm/i915/intel_guc_log.c | 76 +++++++++++++++---------------------
drivers/gpu/drm/i915/intel_guc_log.h | 9 +++--
drivers/gpu/drm/i915/intel_uc.c | 22 -----------
drivers/gpu/drm/i915/intel_uc.h | 2 -
6 files changed, 86 insertions(+), 81 deletions(-)
diff --git a/drivers/gpu/drm/i915/i915_debugfs.c b/drivers/gpu/drm/i915/i915_debugfs.c
index 58983cafaece..4bd24bbe7966 100644
--- a/drivers/gpu/drm/i915/i915_debugfs.c
+++ b/drivers/gpu/drm/i915/i915_debugfs.c
@@ -2496,32 +2496,73 @@ static int i915_guc_log_dump(struct seq_file *m, void *data)
return 0;
}
-static int i915_guc_log_control_get(void *data, u64 *val)
+static int i915_guc_log_level_get(void *data, u64 *val)
{
struct drm_i915_private *dev_priv = data;
s/dev_priv/i915 here and at other places
if (!USES_GUC(dev_priv))
return -ENODEV;
- *val = intel_guc_log_control_get(&dev_priv->guc);
+ *val = intel_guc_log_level_get(&dev_priv->guc);
return 0;
}
-static int i915_guc_log_control_set(void *data, u64 val)
+static int i915_guc_log_level_set(void *data, u64 val)
{
struct drm_i915_private *dev_priv = data;
if (!USES_GUC(dev_priv))
return -ENODEV;
- return intel_guc_log_control_set(&dev_priv->guc, val);
+ return intel_guc_log_level_set(&dev_priv->guc, val);
}
-DEFINE_SIMPLE_ATTRIBUTE(i915_guc_log_control_fops,
- i915_guc_log_control_get, i915_guc_log_control_set,
+DEFINE_SIMPLE_ATTRIBUTE(i915_guc_log_level_fops,
+ i915_guc_log_level_get, i915_guc_log_level_set,
"%lld\n");
+static int i915_guc_log_relay_open(struct inode *inode, struct file *file)
+{
+ struct drm_i915_private *dev_priv = inode->i_private;
+
+ if (!USES_GUC(dev_priv))
+ return -ENODEV;
+
+ file->private_data = dev_priv;
+
write is passing guc struct so should we just set private_data to
&dev_priv->guc?
+ return intel_guc_log_relay_open(&dev_priv->guc);
+}
+
+static ssize_t
+i915_guc_log_relay_write(struct file *filp,
+ const char __user *ubuf,
+ size_t cnt,
+ loff_t *ppos)
+{
+ struct drm_i915_private *dev_priv = filp->private_data;
+
+ intel_guc_log_relay_flush(&dev_priv->guc);
+
+ return cnt;
+}
<snip>
+void intel_guc_log_relay_close(struct intel_guc *guc)
+{
GEM_BUG_ON(!guc_log_has_runtime(guc));
guc_log_has_runtime() check has to be with runtime.lock mutex locked.
With comments addressed:
Reviewed-by: Sagar Arun Kamble <sagar.a.kamble@xxxxxxxxx>
+ guc_log_flush_irq_disable(guc);
+ flush_work(&guc->log.runtime.flush_work);
+
+ mutex_lock(&guc->log.runtime.lock);
guc_log_unmap(guc);
guc_log_relay_destroy(guc);
-
mutex_unlock(&guc->log.runtime.lock);
}
diff --git a/drivers/gpu/drm/i915/intel_guc_log.h b/drivers/gpu/drm/i915/intel_guc_log.h
index 8c26cce77a98..df91f12a36ed 100644
--- a/drivers/gpu/drm/i915/intel_guc_log.h
+++ b/drivers/gpu/drm/i915/intel_guc_log.h
@@ -61,9 +61,10 @@ struct intel_guc_log {
int intel_guc_log_create(struct intel_guc *guc);
void intel_guc_log_destroy(struct intel_guc *guc);
void intel_guc_log_init_early(struct intel_guc *guc);
-int intel_guc_log_control_get(struct intel_guc *guc);
-int intel_guc_log_control_set(struct intel_guc *guc, u64 control_val);
-int intel_guc_log_register(struct intel_guc *guc);
-void intel_guc_log_unregister(struct intel_guc *guc);
+int intel_guc_log_level_get(struct intel_guc *guc);
+int intel_guc_log_level_set(struct intel_guc *guc, u64 control_val);
+int intel_guc_log_relay_open(struct intel_guc *guc);
+void intel_guc_log_relay_close(struct intel_guc *guc);
+void intel_guc_log_relay_flush(struct intel_guc *guc);
#endif
diff --git a/drivers/gpu/drm/i915/intel_uc.c b/drivers/gpu/drm/i915/intel_uc.c
index 55a9b5b673e0..27e1f4c43b7b 100644
--- a/drivers/gpu/drm/i915/intel_uc.c
+++ b/drivers/gpu/drm/i915/intel_uc.c
@@ -219,28 +219,6 @@ static void guc_free_load_err_log(struct intel_guc *guc)
i915_gem_object_put(guc->load_err_log);
}
-int intel_uc_log_register(struct drm_i915_private *dev_priv)
-{
- int ret = 0;
-
- if (!USES_GUC(dev_priv))
- return 0;
-
- if (i915_modparams.guc_log_level)
- ret = intel_guc_log_register(&dev_priv->guc);
-
- return ret;
-}
-
-void intel_uc_log_unregister(struct drm_i915_private *dev_priv)
-{
- if (!USES_GUC(dev_priv))
- return;
-
- if (i915_modparams.guc_log_level)
- intel_guc_log_unregister(&dev_priv->guc);
-}
-
static int guc_enable_communication(struct intel_guc *guc)
{
struct drm_i915_private *dev_priv = guc_to_i915(guc);
diff --git a/drivers/gpu/drm/i915/intel_uc.h b/drivers/gpu/drm/i915/intel_uc.h
index 9bc22103396d..8a7249722ef1 100644
--- a/drivers/gpu/drm/i915/intel_uc.h
+++ b/drivers/gpu/drm/i915/intel_uc.h
@@ -31,8 +31,6 @@
void intel_uc_sanitize_options(struct drm_i915_private *dev_priv);
void intel_uc_init_early(struct drm_i915_private *dev_priv);
void intel_uc_init_mmio(struct drm_i915_private *dev_priv);
-int intel_uc_log_register(struct drm_i915_private *dev_priv);
-void intel_uc_log_unregister(struct drm_i915_private *dev_priv);
void intel_uc_init_fw(struct drm_i915_private *dev_priv);
void intel_uc_fini_fw(struct drm_i915_private *dev_priv);
int intel_uc_init_wq(struct drm_i915_private *dev_priv);
--
Thanks,
Sagar
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