drm/v3d: Add job timeout module param

The previous default is 500 ms which is too short for some workloads
including Piglit.  Adding this parameter will help users to run heavier
tasks.

Signed-off-by: Yukimasa Sugizaki <[email protected]>

Author: Terminus-IMRC

drivers/gpu/drm/v3d/v3d_sched.c

@@ -19,11 +19,17 @@
  */
 
 #include <linux/kthread.h>
+#include <linux/moduleparam.h>
 
 #include "v3d_drv.h"
 #include "v3d_regs.h"
 #include "v3d_trace.h"
 
+uint v3d_hang_limit = 5000;
+MODULE_PARM_DESC(hang_limit,
+	"Timeout for a job in ms (0 means infinity and default is 5000 ms)");
+module_param_named(hang_limit, v3d_hang_limit, uint, 0664);
+
 static struct v3d_job *
 to_v3d_job(struct drm_sched_job *sched_job)
 {
@@ -346,13 +352,13 @@ v3d_sched_init(struct v3d_dev *v3d)
 {
 	int hw_jobs_limit = 1;
 	int job_hang_limit = 0;
-	int hang_limit_ms = 500;
+	uint hang_limit = v3d_hang_limit ?
+			msecs_to_jiffies(v3d_hang_limit) : MAX_SCHEDULE_TIMEOUT;
 	int ret;
 
 	ret = drm_sched_init(&v3d->queue[V3D_BIN].sched,
 			     &v3d_bin_sched_ops,
-			     hw_jobs_limit, job_hang_limit,
-			     msecs_to_jiffies(hang_limit_ms),
+			     hw_jobs_limit, job_hang_limit, hang_limit,
 			     "v3d_bin");
 	if (ret) {
 		dev_err(v3d->dev, "Failed to create bin scheduler: %d.", ret);
@@ -361,8 +367,7 @@ v3d_sched_init(struct v3d_dev *v3d)
 
 	ret = drm_sched_init(&v3d->queue[V3D_RENDER].sched,
 			     &v3d_render_sched_ops,
-			     hw_jobs_limit, job_hang_limit,
-			     msecs_to_jiffies(hang_limit_ms),
+			     hw_jobs_limit, job_hang_limit, hang_limit,
 			     "v3d_render");
 	if (ret) {
 		dev_err(v3d->dev, "Failed to create render scheduler: %d.",
@@ -373,8 +378,7 @@ v3d_sched_init(struct v3d_dev *v3d)
 
 	ret = drm_sched_init(&v3d->queue[V3D_TFU].sched,
 			     &v3d_tfu_sched_ops,
-			     hw_jobs_limit, job_hang_limit,
-			     msecs_to_jiffies(hang_limit_ms),
+			     hw_jobs_limit, job_hang_limit, hang_limit,
 			     "v3d_tfu");
 	if (ret) {
 		dev_err(v3d->dev, "Failed to create TFU scheduler: %d.",
@@ -386,8 +390,7 @@ v3d_sched_init(struct v3d_dev *v3d)
 	if (v3d_has_csd(v3d)) {
 		ret = drm_sched_init(&v3d->queue[V3D_CSD].sched,
 				     &v3d_csd_sched_ops,
-				     hw_jobs_limit, job_hang_limit,
-				     msecs_to_jiffies(hang_limit_ms),
+				     hw_jobs_limit, job_hang_limit, hang_limit,
 				     "v3d_csd");
 		if (ret) {
 			dev_err(v3d->dev, "Failed to create CSD scheduler: %d.",
@@ -398,8 +401,7 @@ v3d_sched_init(struct v3d_dev *v3d)
 
 		ret = drm_sched_init(&v3d->queue[V3D_CACHE_CLEAN].sched,
 				     &v3d_cache_clean_sched_ops,
-				     hw_jobs_limit, job_hang_limit,
-				     msecs_to_jiffies(hang_limit_ms),
+				     hw_jobs_limit, job_hang_limit, hang_limit,
 				     "v3d_cache_clean");
 		if (ret) {
 			dev_err(v3d->dev, "Failed to create CACHE_CLEAN scheduler: %d.",