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.
v2: Don't touch guc_log_level on relay creation error, adjust locking
after rebase, s/dev_priv/i915, pass guc to file->private_data (Sagar)
Use struct_mutex rather than runtime.lock for set_log_level
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 | 4 --
drivers/gpu/drm/i915/intel_guc_log.c | 77 +++++++++++++++---------------------
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, 85 insertions(+), 85 deletions(-)
diff --git a/drivers/gpu/drm/i915/i915_debugfs.c b/drivers/gpu/drm/i915/i915_debugfs.c
index fa0755fe10d0..f99fe9910634 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;
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->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 intel_guc *guc = filp->private_data;
+
+ intel_guc_log_relay_flush(guc);
+
+ return cnt;
+}
+
+static int i915_guc_log_relay_release(struct inode *inode, struct file *file)
+{
+ struct drm_i915_private *dev_priv = inode->i_private;
+
+ intel_guc_log_relay_close(&dev_priv->guc);
+
+ return 0;
+}
+
+static const struct file_operations i915_guc_log_relay_fops = {
+ .owner = THIS_MODULE,
+ .open = i915_guc_log_relay_open,
+ .write = i915_guc_log_relay_write,
+ .release = i915_guc_log_relay_release,
+};
+
static const char *psr2_live_status(u32 val)
{
static const char * const live_status[] = {
@@ -4776,7 +4817,8 @@ static const struct i915_debugfs_files {
{"i915_dp_test_data", &i915_displayport_test_data_fops},
{"i915_dp_test_type", &i915_displayport_test_type_fops},
{"i915_dp_test_active", &i915_displayport_test_active_fops},
- {"i915_guc_log_control", &i915_guc_log_control_fops},
+ {"i915_guc_log_level", &i915_guc_log_level_fops},
+ {"i915_guc_log_relay", &i915_guc_log_relay_fops},
{"i915_hpd_storm_ctl", &i915_hpd_storm_ctl_fops},
{"i915_ipc_status", &i915_ipc_status_fops},
{"i915_drrs_ctl", &i915_drrs_ctl_fops}
diff --git a/drivers/gpu/drm/i915/i915_drv.c b/drivers/gpu/drm/i915/i915_drv.c
index 987c6770d1a6..0a238e3ed5b6 100644
--- a/drivers/gpu/drm/i915/i915_drv.c
+++ b/drivers/gpu/drm/i915/i915_drv.c
@@ -1240,9 +1240,6 @@ static void i915_driver_register(struct drm_i915_private *dev_priv)
i915_debugfs_register(dev_priv);
i915_setup_sysfs(dev_priv);
- /* Depends on debugfs having been initialized */
- intel_uc_register(dev_priv);
-
/* Depends on sysfs having been initialized */
i915_perf_register(dev_priv);
} else
@@ -1300,7 +1297,6 @@ static void i915_driver_unregister(struct drm_i915_private *dev_priv)
i915_pmu_unregister(dev_priv);
i915_teardown_sysfs(dev_priv);
- intel_uc_unregister(dev_priv);
drm_dev_unregister(&dev_priv->drm);
i915_gem_shrinker_unregister(dev_priv);
diff --git a/drivers/gpu/drm/i915/intel_guc_log.c b/drivers/gpu/drm/i915/intel_guc_log.c
index 5ff4b510569a..62bf8da14b13 100644
--- a/drivers/gpu/drm/i915/intel_guc_log.c
+++ b/drivers/gpu/drm/i915/intel_guc_log.c
@@ -406,18 +406,13 @@ static int guc_log_relay_create(struct intel_guc *guc)
DRM_ERROR("Couldn't create relay chan for GuC logging\n");
ret = -ENOMEM;
- goto err;
+ return ret;
}
GEM_BUG_ON(guc_log_relay_chan->subbuf_size < subbuf_size);
guc->log.runtime.relay_chan = guc_log_relay_chan;
return 0;
-
-err:
- /* logging will be off */
- i915_modparams.guc_log_level = 0;
- return ret;
}
static void guc_log_relay_destroy(struct intel_guc *guc)
@@ -508,7 +503,7 @@ void intel_guc_log_destroy(struct intel_guc *guc)
i915_vma_unpin_and_release(&guc->log.vma);
}
-int intel_guc_log_control_get(struct intel_guc *guc)
+int intel_guc_log_level_get(struct intel_guc *guc)
{
GEM_BUG_ON(!guc->log.vma);
GEM_BUG_ON(i915_modparams.guc_log_level < 0);
@@ -523,10 +518,9 @@ int intel_guc_log_control_get(struct intel_guc *guc)
LOG_LEVEL_TO_ENABLED(_x) ? _x - 1 : 0; \
})
#define VERBOSITY_TO_LOG_LEVEL(x) ((x) + 1)
-int intel_guc_log_control_set(struct intel_guc *guc, u64 val)
+int intel_guc_log_level_set(struct intel_guc *guc, u64 val)
{
struct drm_i915_private *dev_priv = guc_to_i915(guc);
- bool enabled = LOG_LEVEL_TO_ENABLED(val);
int ret;
BUILD_BUG_ON(GUC_LOG_VERBOSITY_MIN != 0);
@@ -549,7 +543,8 @@ int intel_guc_log_control_set(struct intel_guc *guc, u64 val)
}
intel_runtime_pm_get(dev_priv);
- ret = guc_log_control(guc, enabled, LOG_LEVEL_TO_VERBOSITY(val));
+ ret = guc_log_control(guc, LOG_LEVEL_TO_ENABLED(val),
+ LOG_LEVEL_TO_VERBOSITY(val));
intel_runtime_pm_put(dev_priv);
if (ret) {
DRM_DEBUG_DRIVER("guc_log_control action failed %d\n", ret);
@@ -558,88 +553,78 @@ int intel_guc_log_control_set(struct intel_guc *guc, u64 val)
i915_modparams.guc_log_level = val;
- mutex_unlock(&dev_priv->drm.struct_mutex);
-
- if (enabled && !guc_log_has_runtime(guc)) {
- ret = intel_guc_log_register(guc);
- if (ret) {
- /* logging will remain off */
- i915_modparams.guc_log_level = 0;
- goto out;
- }
- } else if (!enabled && guc_log_has_runtime(guc)) {
- intel_guc_log_unregister(guc);
- }
-
- return 0;
-
out_unlock:
mutex_unlock(&dev_priv->drm.struct_mutex);
-out:
+
return ret;
}
-int intel_guc_log_register(struct intel_guc *guc)
+int intel_guc_log_relay_open(struct intel_guc *guc)
{
int ret;
mutex_lock(&guc->log.runtime.lock);
- GEM_BUG_ON(guc_log_has_runtime(guc));
+ if (guc_log_has_runtime(guc)) {
+ ret = -EEXIST;
+ goto out_unlock;
+ }
ret = guc_log_relay_create(guc);
if (ret)
- goto err;
+ goto out_unlock;
ret = guc_log_map(guc);
if (ret)
- goto err_relay;
+ goto out_relay;
+
+ mutex_unlock(&guc->log.runtime.lock);
guc_log_flush_irq_enable(guc);
- mutex_unlock(&guc->log.runtime.lock);
+ /*
+ * When GuC is logging without us relaying to userspace, we're ignoring
+ * the flush notification. This means that we need to unconditionally
+ * flush on relay enabling, since GuC only notifies us once.
+ */
+ queue_work(guc->log.runtime.flush_wq, &guc->log.runtime.flush_work);
return 0;
-err_relay:
+out_relay:
guc_log_relay_destroy(guc);
-err:
+out_unlock:
mutex_unlock(&guc->log.runtime.lock);
return ret;
}
-void intel_guc_log_unregister(struct intel_guc *guc)
+void intel_guc_log_relay_flush(struct intel_guc *guc)
{
struct drm_i915_private *i915 = guc_to_i915(guc);
- guc_log_flush_irq_disable(guc);
-
/*
* Before initiating the forceful flush, wait for any pending/ongoing
* flush to complete otherwise forceful flush may not actually happen.
*/
flush_work(&guc->log.runtime.flush_work);
- /*
- * Once logging is disabled, GuC won't generate logs & send an
- * interrupt. But there could be some data in the log buffer
- * which is yet to be captured. So request GuC to update the log
- * buffer state and then collect the left over logs.
- */
intel_runtime_pm_get(i915);
guc_log_flush(guc);
intel_runtime_pm_put(i915);
/* GuC would have updated log buffer by now, so capture it */
guc_log_capture_logs(guc);
+}
- mutex_lock(&guc->log.runtime.lock);
+void intel_guc_log_relay_close(struct intel_guc *guc)
+{
+ guc_log_flush_irq_disable(guc);
+ flush_work(&guc->log.runtime.flush_work);
+ mutex_lock(&guc->log.runtime.lock);
GEM_BUG_ON(!guc_log_has_runtime(guc));
-
- guc_log_unmap(guc);
+ 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 90d2f38e22c9..abce0e38528a 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_register(struct drm_i915_private *i915)
-{
- int ret = 0;
-
- if (!USES_GUC(i915))
- return 0;
-
- if (i915_modparams.guc_log_level)
- ret = intel_guc_log_register(&i915->guc);
-
- return ret;
-}
-
-void intel_uc_unregister(struct drm_i915_private *i915)
-{
- if (!USES_GUC(i915))
- return;
-
- if (i915_modparams.guc_log_level)
- intel_guc_log_unregister(&i915->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 d6af984cd789..f76d51d1ce70 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_register(struct drm_i915_private *dev_priv);
-void intel_uc_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_misc(struct drm_i915_private *dev_priv);
--
2.14.3
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