drm/amdgpu: add scheduler initialization

1. Add kernel parameter option, default 0
2. Add scheduler initialization for amdgpu

Signed-off-by: Chunming Zhou <David1.Zhou@amd.com>
Signed-off-by: Jammy Zhou <Jammy.Zhou@amd.com>
Acked-by: Christian K?nig <christian.koenig@amd.com>
Reviewed-by: Jammy Zhou <Jammy.Zhou@amd.com>

drivers/gpu/drm/amd/amdgpu/Makefile

@@ -4,7 +4,8 @@
 
 ccflags-y := -Iinclude/drm -Idrivers/gpu/drm/amd/include/asic_reg \
 	-Idrivers/gpu/drm/amd/include \
-	-Idrivers/gpu/drm/amd/amdgpu
+	-Idrivers/gpu/drm/amd/amdgpu \
+	-Idrivers/gpu/drm/amd/scheduler
 
 amdgpu-y := amdgpu_drv.o
 
@@ -82,6 +83,10 @@ amdgpu-y += \
 # add cgs
 amdgpu-y += amdgpu_cgs.o
 
+# GPU scheduler
+amdgpu-y += \
+	../scheduler/gpu_scheduler.o
+
 amdgpu-$(CONFIG_COMPAT) += amdgpu_ioc32.o
 amdgpu-$(CONFIG_VGA_SWITCHEROO) += amdgpu_atpx_handler.o
 amdgpu-$(CONFIG_ACPI) += amdgpu_acpi.o

drivers/gpu/drm/amd/amdgpu/amdgpu.h

@@ -53,6 +53,8 @@
 #include "amdgpu_ucode.h"
 #include "amdgpu_gds.h"
 
+#include "gpu_scheduler.h"
+
 /*
  * Modules parameters.
  */
@@ -77,6 +79,7 @@ extern int amdgpu_bapm;
 extern int amdgpu_deep_color;
 extern int amdgpu_vm_size;
 extern int amdgpu_vm_block_size;
+extern int amdgpu_enable_scheduler;
 
 #define AMDGPU_MAX_USEC_TIMEOUT			100000	/* 100 ms */
 #define AMDGPU_FENCE_JIFFIES_TIMEOUT		(HZ / 2)
@@ -860,6 +863,7 @@ struct amdgpu_ring {
 	struct amdgpu_device		*adev;
 	const struct amdgpu_ring_funcs	*funcs;
 	struct amdgpu_fence_driver	fence_drv;
+	struct amd_gpu_scheduler 	*scheduler;
 
 	struct mutex		*ring_lock;
 	struct amdgpu_bo	*ring_obj;

drivers/gpu/drm/amd/amdgpu/amdgpu_drv.c

@@ -75,6 +75,7 @@ int amdgpu_deep_color = 0;
 int amdgpu_vm_size = 8;
 int amdgpu_vm_block_size = -1;
 int amdgpu_exp_hw_support = 0;
+int amdgpu_enable_scheduler = 0;
 
 MODULE_PARM_DESC(vramlimit, "Restrict VRAM for testing, in megabytes");
 module_param_named(vramlimit, amdgpu_vram_limit, int, 0600);

drivers/gpu/drm/amd/amdgpu/amdgpu_fence.c

@@ -902,6 +902,14 @@ void amdgpu_fence_driver_init_ring(struct amdgpu_ring *ring)
 	INIT_DELAYED_WORK(&ring->fence_drv.lockup_work,
 			amdgpu_fence_check_lockup);
 	ring->fence_drv.ring = ring;
+
+	if (amdgpu_enable_scheduler) {
+		ring->scheduler = amd_sched_create((void *)ring->adev,
+						   NULL, ring->idx, 5, 0);
+		if (!ring->scheduler)
+			DRM_ERROR("Failed to create scheduler on ring %d.\n",
+				  ring->idx);
+	}
 }
 
 /**
@@ -950,6 +958,8 @@ void amdgpu_fence_driver_fini(struct amdgpu_device *adev)
 		wake_up_all(&adev->fence_queue);
 		amdgpu_irq_put(adev, ring->fence_drv.irq_src,
 			       ring->fence_drv.irq_type);
+		if (ring->scheduler)
+			amd_sched_destroy(ring->scheduler);
 		ring->fence_drv.initialized = false;
 	}
 	mutex_unlock(&adev->ring_lock);