[PATCH 1/3] lib/intel_compute: loop_kernel_duration in Pipeline

[nishit.sharma at intel.com]

From: Nishit Sharma <nishit.sharma at intel.com>

To execute KERNEL in GPU for specific duration a brief sleep is
required. New variable loop_kernel_duration is introduced in
struct user_execenv which holds duration for sleep and during this
duration the GPU will be running kernel. xe_run_intel_compute_xxx()
calls are synchronous hence to execute workload on GPU for sometime
sleep has been called. loop_kernel_duration acts as sleep duration.
loop_kernel_duration is checked for all pipelines. Currently xe2lpg and
xe3lpg pipeline support loop_kernel shader hence loop_kernel_duration
works in these pipelines only.

Signed-off-by: Nishit Sharma <nishit.sharma at intel.com>
---
 lib/intel_compute.c | 25 ++++++++++++++++++++++++-
 lib/intel_compute.h |  2 ++
 2 files changed, 26 insertions(+), 1 deletion(-)

diff --git a/lib/intel_compute.c b/lib/intel_compute.c
index 147dd2916..5a919deb8 100644
--- a/lib/intel_compute.c
+++ b/lib/intel_compute.c
@@ -849,6 +849,9 @@ static void compute_exec(int fd, const unsigned char *kernel,
 	uint16_t devid = intel_get_drm_devid(fd);
 	int entries = ARRAY_SIZE(bo_dict);
 
+	if (user && (user->kernel || user->loop_kernel_duration))
+		igt_skip("Pipeline doesn't support loop_kernel\n");
+
 	bo_execenv_create(fd, &execenv, eci, user);
 
 	/* Set dynamic sizes */
@@ -1131,6 +1134,9 @@ static void xehp_compute_exec(int fd, const unsigned char *kernel,
 	uint64_t bind_output_addr = (user && user->output_addr) ? user->output_addr : ADDR_OUTPUT;
 	int entries = ARRAY_SIZE(bo_dict);
 
+	if (user && (user->kernel || user->loop_kernel_duration))
+		igt_skip("Pipeline doesn't support loop_kernel\n");
+
 	bo_execenv_create(fd, &execenv, eci, user);
 
 	/* Set dynamic sizes */
@@ -1343,6 +1349,9 @@ static void xehpc_compute_exec(int fd, const unsigned char *kernel,
 	uint64_t bind_output_addr = (user && user->output_addr) ? user->output_addr : ADDR_OUTPUT;
 	int entries = ARRAY_SIZE(bo_dict);
 
+	if (user && (user->kernel || user->loop_kernel_duration))
+		igt_skip("Pipeline doesn't support loop_kernel\n");
+
 	bo_execenv_create(fd, &execenv, eci, user);
 
 	/* Set dynamic sizes */
@@ -1731,6 +1740,9 @@ static void xelpg_compute_exec(int fd, const unsigned char *kernel,
 	uint64_t bind_output_addr = (user && user->output_addr) ? user->output_addr : ADDR_OUTPUT;
 	int entries = ARRAY_SIZE(bo_dict);
 
+	if (user && (user->kernel || user->loop_kernel_duration))
+		igt_skip("Pipeline doesn't support loop_kernel\n");
+
 	bo_execenv_create(fd, &execenv, eci, user);
 
 	/* Set dynamic sizes */
@@ -1818,6 +1830,7 @@ static void xe2lpg_compute_exec(int fd, const unsigned char *kernel,
 	uint64_t bind_input_addr = (user && user->input_addr) ? user->input_addr : ADDR_INPUT;
 	uint64_t bind_output_addr = (user && user->output_addr) ? user->output_addr : ADDR_OUTPUT;
 	int entries = ARRAY_SIZE(bo_dict);
+	int64_t timeout_one_ns = 1;
 
 	bo_execenv_create(fd, &execenv, eci, user);
 
@@ -1849,7 +1862,17 @@ static void xe2lpg_compute_exec(int fd, const unsigned char *kernel,
 				    OFFSET_KERNEL, 0, false,
 				    execenv.array_size);
 
-	bo_execenv_exec(&execenv, ADDR_BATCH);
+	if (user && user->loop_kernel_duration) {
+		bo_execenv_exec_async(&execenv, ADDR_BATCH);
+		igt_measured_usleep(user->loop_kernel_duration);
+		/* Check that the loop kernel has not completed yet */
+		igt_assert_neq(0, __xe_wait_ufence(fd, &execenv.bo_sync->sync, USER_FENCE_VALUE,
+					execenv.exec_queue, &timeout_one_ns));
+		((int *)bo_dict[4].data)[0] = MAGIC_LOOP_STOP;
+		bo_execenv_sync(&execenv);
+		user->skip_results_check = 1;
+	} else
+		bo_execenv_exec(&execenv, ADDR_BATCH);
 
 	if (!user || (user && !user->skip_results_check))
 		bo_check_square(input_data, output_data, execenv.array_size);
diff --git a/lib/intel_compute.h b/lib/intel_compute.h
index 412791d07..54a1c7f82 100644
--- a/lib/intel_compute.h
+++ b/lib/intel_compute.h
@@ -63,6 +63,8 @@ struct user_execenv {
 	uint64_t input_addr;
 	/** @output_addr: override default address of the output array if provided */
 	uint64_t output_addr;
+	/** @loop_kernel_duration: duration till kernel should execute in gpu **/
+	uint64_t loop_kernel_duration;
 };
 
 enum execenv_alloc_prefs {
-- 
2.43.0