radv: Add timelines with a VK_KHR_timeline_semaphore impl.

This does not fully do wait-before-submit, to be done in a follow
up patch.

For kernels without support for timeline syncobjs, this adds an
implementation of non-shareable timelines using legacy syncobjs.

Reviewed-by: Samuel Pitoiset <[email protected]>

1 files changed, 31 insertions, 0 deletions

diff --git a/src/amd/vulkan/radv_private.h b/src/amd/vulkan/radv_private.h
index ef7ba34c85b..6eb4e5fbe3f 100644
--- a/src/amd/vulkan/radv_private.h
+++ b/src/amd/vulkan/radv_private.h
@@ -820,6 +820,10 @@ struct radv_device {
 	int force_aniso;
 
 	struct radv_secure_compile_state *sc_state;
+
+	/* Condition variable for legacy timelines, to notify waiters when a
+	 * new point gets submitted. */
+	pthread_cond_t timeline_cond;
 };
 
 struct radv_device_memory {
@@ -2168,13 +2172,40 @@ typedef enum {
 	RADV_SEMAPHORE_NONE,
 	RADV_SEMAPHORE_WINSYS,
 	RADV_SEMAPHORE_SYNCOBJ,
+	RADV_SEMAPHORE_TIMELINE,
 } radv_semaphore_kind;
 
+struct radv_timeline_point {
+	struct list_head list;
+
+	uint64_t value;
+	uint32_t syncobj;
+
+	/* Separate from the list to accomodate CPU wait being async, as well
+	 * as prevent point deletion during submission. */
+	unsigned wait_count;
+};
+
+struct radv_timeline {
+	/* Using a pthread mutex to be compatible with condition variables. */
+	pthread_mutex_t mutex;
+
+	uint64_t highest_signaled;
+	uint64_t highest_submitted;
+
+	struct list_head points;
+
+	/* Keep free points on hand so we do not have to recreate syncobjs all
+	 * the time. */
+	struct list_head free_points;
+};
+
 struct radv_semaphore_part {
 	radv_semaphore_kind kind;
 	union {
 		uint32_t syncobj;
 		struct radeon_winsys_sem *ws_sem;
+		struct radv_timeline timeline;
 	};
 };