[PATCH v4 7/9] drm/xe: Add a Kconfig option for GPU work period

[Aakash Deep Sarkar <aakash.deep.sarkar@intel.com>]

Since this requirement is intended only for Android, there's
no reason to have it enabled by default in other distributions.
So, better to have it guarded by a Kconfig option.

Signed-off-by: Aakash Deep Sarkar <aakash.deep.sarkar@intel.com>
---
 drivers/gpu/drm/xe/Makefile        |  2 +-
 drivers/gpu/drm/xe/xe_device.c     |  1 -
 drivers/gpu/drm/xe/xe_exec_queue.c |  5 +++--
 drivers/gpu/drm/xe/xe_user.h       | 27 ++++++++++++++++++++++++++-
 drivers/gpu/trace/Kconfig          | 12 ++++++++++++
 5 files changed, 42 insertions(+), 5 deletions(-)

diff --git a/drivers/gpu/drm/xe/Makefile b/drivers/gpu/drm/xe/Makefile
index ff6b584f3293..6fc23367bdfe 100644
--- a/drivers/gpu/drm/xe/Makefile
+++ b/drivers/gpu/drm/xe/Makefile
@@ -333,7 +333,7 @@ ifeq ($(CONFIG_DEBUG_FS),y)
 
 	xe-$(CONFIG_PCI_IOV) += xe_gt_sriov_pf_debugfs.o
 
-	xe-y += xe_user.o
+	xe-$(CONFIG_TRACE_GPU_WORK_PERIOD) += xe_user.o
 
 	xe-$(CONFIG_DRM_XE_DISPLAY) += \
 		i915-display/intel_display_debugfs.o \
diff --git a/drivers/gpu/drm/xe/xe_device.c b/drivers/gpu/drm/xe/xe_device.c
index 5569a27abb09..c34da72e5c9a 100644
--- a/drivers/gpu/drm/xe/xe_device.c
+++ b/drivers/gpu/drm/xe/xe_device.c
@@ -486,7 +486,6 @@ struct xe_device *xe_device_create(struct pci_dev *pdev,
 	xa_init_flags(&xe->usm.asid_to_vm, XA_FLAGS_ALLOC);
 
 	xa_init_flags(&xe->work_period.users, XA_FLAGS_ALLOC1);
-
 	mutex_init(&xe->work_period.lock);
 
 	if (IS_ENABLED(CONFIG_DRM_XE_DEBUG)) {
diff --git a/drivers/gpu/drm/xe/xe_exec_queue.c b/drivers/gpu/drm/xe/xe_exec_queue.c
index 6eb34c62c779..d5013d546348 100644
--- a/drivers/gpu/drm/xe/xe_exec_queue.c
+++ b/drivers/gpu/drm/xe/xe_exec_queue.c
@@ -915,9 +915,10 @@ void xe_exec_queue_update_run_ticks(struct xe_exec_queue *q)
 	new_ts = xe_lrc_update_timestamp(lrc, &old_ts);
 	q->xef->run_ticks[q->class] += (new_ts - old_ts) * q->width;
 
-	// Accumulate the runtime in nanosec for this queue into the xe file.
+
+	// Accumulate the runtime in ns for this queue
 	q->xef->active_duration_ns +=
-		xe_gt_clock_interval_to_ns(gt, (new_ts - old_ts));
+			xe_gt_clock_interval_to_ns(gt, (new_ts - old_ts));
 
 	drm_dev_exit(idx);
 }
diff --git a/drivers/gpu/drm/xe/xe_user.h b/drivers/gpu/drm/xe/xe_user.h
index ded816be7334..e4b726f989a4 100644
--- a/drivers/gpu/drm/xe/xe_user.h
+++ b/drivers/gpu/drm/xe/xe_user.h
@@ -72,12 +72,38 @@ struct xe_user {
 	u64 last_timestamp_ns;
 };
 
+#if IS_ENABLED(CONFIG_TRACE_GPU_WORK_PERIOD)
+
 int xe_user_init(struct xe_device *xe, struct xe_file *xef, unsigned int uid);
 
 void xe_user_cancel_workers(struct xe_device *xe);
 
 void xe_user_resume_workers(struct xe_device *xe);
 
+void __xe_user_free(struct kref *kref);
+
+#else
+
+static inline
+int xe_user_init(struct xe_device *xe, struct xe_file *xef, unsigned int uid)
+{
+	return 0;
+}
+
+static inline void __xe_user_free(struct kref *kref)
+{
+}
+
+static inline void xe_user_cancel_workers(struct xe_device *xe)
+{
+}
+
+static inline void xe_user_resume_workers(struct xe_device *xe)
+{
+}
+
+#endif // CONFIG_TRACE_GPU_WORK_PERIOD
+
 static inline struct xe_user *
 xe_user_get_unless_zero(struct xe_user *user)
 {
@@ -93,7 +119,6 @@ xe_user_get(struct xe_user *user)
 	return user;
 }
 
-void __xe_user_free(struct kref *kref);
 
 static inline void xe_user_put(struct xe_user *user)
 {
diff --git a/drivers/gpu/trace/Kconfig b/drivers/gpu/trace/Kconfig
index cd3d19c4a201..34f2e08cf1be 100644
--- a/drivers/gpu/trace/Kconfig
+++ b/drivers/gpu/trace/Kconfig
@@ -11,3 +11,15 @@ config TRACE_GPU_MEM
 	  Tracepoint availability varies by GPU driver.
 
 	  If in doubt, say "N".
+
+config TRACE_GPU_WORK_PERIOD
+	bool "Enable GPU work period tracepoint"
+	default n
+	help
+	  Choose this option to enable tracepoint for tracking
+	  GPU usage based on the UID. Intended for performance
+	  profiling and required for Android.
+
+	  Tracepoint availability varies by GPU driver.
+
+	  If in doubt, say "N".
-- 
2.49.0