drm/lima: add max_error_tasks module parameter

Limit error tasks to save.
Tested-by: Andreas Baierl <ichgeh@imkreisrum.de>
Reviewed-by: Vasily Khoruzhick <anarsoul@gmail.com>
Signed-off-by: Qiang Yu <yuq825@gmail.com>
Link: https://patchwork.freedesktop.org/patch/msgid/20200222024210.18697-3-yuq825@gmail.com

drivers/gpu/drm/lima/lima_drv.c

@@ -16,6 +16,7 @@
 
 int lima_sched_timeout_ms;
 uint lima_heap_init_nr_pages = 8;
+uint lima_max_error_tasks;
 
 MODULE_PARM_DESC(sched_timeout_ms, "task run timeout in ms");
 module_param_named(sched_timeout_ms, lima_sched_timeout_ms, int, 0444);
@@ -23,6 +24,9 @@ module_param_named(sched_timeout_ms, lima_sched_timeout_ms, int, 0444);
 MODULE_PARM_DESC(heap_init_nr_pages, "heap buffer init number of pages");
 module_param_named(heap_init_nr_pages, lima_heap_init_nr_pages, uint, 0444);
 
+MODULE_PARM_DESC(max_error_tasks, "max number of error tasks to save");
+module_param_named(max_error_tasks, lima_max_error_tasks, uint, 0644);
+
 static int lima_ioctl_get_param(struct drm_device *dev, void *data, struct drm_file *file)
 {
 	struct drm_lima_get_param *args = data;

drivers/gpu/drm/lima/lima_drv.h

@@ -10,6 +10,7 @@
 
 extern int lima_sched_timeout_ms;
 extern uint lima_heap_init_nr_pages;
+extern uint lima_max_error_tasks;
 
 struct lima_vm;
 struct lima_bo;