drivers/gpu/drm/radeon/radeon_test.c - linux - Git at Google

 /*
  * Copyright 2009 VMware, Inc.
  *
  * Permission is hereby granted, free of charge, to any person obtaining a
  * copy of this software and associated documentation files (the "Software"),
  * to deal in the Software without restriction, including without limitation
  * the rights to use, copy, modify, merge, publish, distribute, sublicense,
  * and/or sell copies of the Software, and to permit persons to whom the
  * Software is furnished to do so, subject to the following conditions:
  *
  * The above copyright notice and this permission notice shall be included in
  * all copies or substantial portions of the Software.
  *
  * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
  * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
  * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.  IN NO EVENT SHALL
  * THE COPYRIGHT HOLDER(S) OR AUTHOR(S) BE LIABLE FOR ANY CLAIM, DAMAGES OR
  * OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE,
  * ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR
  * OTHER DEALINGS IN THE SOFTWARE.
  *
  * Authors: Michel Dänzer
  */
 #include <drm/drmP.h>
 #include <drm/radeon_drm.h>
 #include "radeon_reg.h"
 #include "radeon.h"


 /* Test BO GTT->VRAM and VRAM->GTT GPU copies across the whole GTT aperture */
 void radeon_test_moves(struct radeon_device *rdev)
 {
 	struct radeon_bo *vram_obj = NULL;
 	struct radeon_bo **gtt_obj = NULL;
 	struct radeon_fence *fence = NULL;
 	uint64_t gtt_addr, vram_addr;
 	unsigned i, n, size;
 	int r;

 	size = 1024 * 1024;

 	/* Number of tests =
 	 * (Total GTT - IB pool - writeback page - ring buffers) / test size
 	 */
 	n = rdev->mc.gtt_size - RADEON_IB_POOL_SIZE*64*1024;
 	for (i = 0; i < RADEON_NUM_RINGS; ++i)
 		n -= rdev->ring[i].ring_size;
 	if (rdev->wb.wb_obj)
 		n -= RADEON_GPU_PAGE_SIZE;
 	if (rdev->ih.ring_obj)
 		n -= rdev->ih.ring_size;
 	n /= size;

 	gtt_obj = kzalloc(n * sizeof(*gtt_obj), GFP_KERNEL);
 	if (!gtt_obj) {
 		DRM_ERROR("Failed to allocate %d pointers\n", n);
 		r = 1;
 		goto out_cleanup;
 	}

 	r = radeon_bo_create(rdev, size, PAGE_SIZE, true, RADEON_GEM_DOMAIN_VRAM,
 			     NULL, &vram_obj);
 	if (r) {
 		DRM_ERROR("Failed to create VRAM object\n");
 		goto out_cleanup;
 	}
 	r = radeon_bo_reserve(vram_obj, false);
 	if (unlikely(r != 0))
 		goto out_cleanup;
 	r = radeon_bo_pin(vram_obj, RADEON_GEM_DOMAIN_VRAM, &vram_addr);
 	if (r) {
 		DRM_ERROR("Failed to pin VRAM object\n");
 		goto out_cleanup;
 	}
 	for (i = 0; i < n; i++) {
 		void *gtt_map, *vram_map;
 		void **gtt_start, **gtt_end;
 		void **vram_start, **vram_end;

 		r = radeon_bo_create(rdev, size, PAGE_SIZE, true,
 				     RADEON_GEM_DOMAIN_GTT, NULL, gtt_obj + i);
 		if (r) {
 			DRM_ERROR("Failed to create GTT object %d\n", i);
 			goto out_cleanup;
 		}

 		r = radeon_bo_reserve(gtt_obj[i], false);
 		if (unlikely(r != 0))
 			goto out_cleanup;
 		r = radeon_bo_pin(gtt_obj[i], RADEON_GEM_DOMAIN_GTT, &gtt_addr);
 		if (r) {
 			DRM_ERROR("Failed to pin GTT object %d\n", i);
 			goto out_cleanup;
 		}

 		r = radeon_bo_kmap(gtt_obj[i], &gtt_map);
 		if (r) {
 			DRM_ERROR("Failed to map GTT object %d\n", i);
 			goto out_cleanup;
 		}

 		for (gtt_start = gtt_map, gtt_end = gtt_map + size;
 		     gtt_start < gtt_end;
 		     gtt_start++)
 			*gtt_start = gtt_start;

 		radeon_bo_kunmap(gtt_obj[i]);

 		r = radeon_copy(rdev, gtt_addr, vram_addr, size / RADEON_GPU_PAGE_SIZE, &fence);
 		if (r) {
 			DRM_ERROR("Failed GTT->VRAM copy %d\n", i);
 			goto out_cleanup;
 		}

 		r = radeon_fence_wait(fence, false);
 		if (r) {
 			DRM_ERROR("Failed to wait for GTT->VRAM fence %d\n", i);
 			goto out_cleanup;
 		}

 		radeon_fence_unref(&fence);

 		r = radeon_bo_kmap(vram_obj, &vram_map);
 		if (r) {
 			DRM_ERROR("Failed to map VRAM object after copy %d\n", i);
 			goto out_cleanup;
 		}

 		for (gtt_start = gtt_map, gtt_end = gtt_map + size,
 		     vram_start = vram_map, vram_end = vram_map + size;
 		     vram_start < vram_end;
 		     gtt_start++, vram_start++) {
 			if (*vram_start != gtt_start) {
 				DRM_ERROR("Incorrect GTT->VRAM copy %d: Got 0x%p, "
 					  "expected 0x%p (GTT/VRAM offset "
 					  "0x%16llx/0x%16llx)\n",
 					  i, *vram_start, gtt_start,
 					  (unsigned long long)
 					  (gtt_addr - rdev->mc.gtt_start +
 					   (void*)gtt_start - gtt_map),
 					  (unsigned long long)
 					  (vram_addr - rdev->mc.vram_start +
 					   (void*)gtt_start - gtt_map));
 				radeon_bo_kunmap(vram_obj);
 				goto out_cleanup;
 			}
 			*vram_start = vram_start;
 		}

 		radeon_bo_kunmap(vram_obj);

 		r = radeon_copy(rdev, vram_addr, gtt_addr, size / RADEON_GPU_PAGE_SIZE, &fence);
 		if (r) {
 			DRM_ERROR("Failed VRAM->GTT copy %d\n", i);
 			goto out_cleanup;
 		}

 		r = radeon_fence_wait(fence, false);
 		if (r) {
 			DRM_ERROR("Failed to wait for VRAM->GTT fence %d\n", i);
 			goto out_cleanup;
 		}

 		radeon_fence_unref(&fence);

 		r = radeon_bo_kmap(gtt_obj[i], &gtt_map);
 		if (r) {
 			DRM_ERROR("Failed to map GTT object after copy %d\n", i);
 			goto out_cleanup;
 		}

 		for (gtt_start = gtt_map, gtt_end = gtt_map + size,
 		     vram_start = vram_map, vram_end = vram_map + size;
 		     gtt_start < gtt_end;
 		     gtt_start++, vram_start++) {
 			if (*gtt_start != vram_start) {
 				DRM_ERROR("Incorrect VRAM->GTT copy %d: Got 0x%p, "
 					  "expected 0x%p (VRAM/GTT offset "
 					  "0x%16llx/0x%16llx)\n",
 					  i, *gtt_start, vram_start,
 					  (unsigned long long)
 					  (vram_addr - rdev->mc.vram_start +
 					   (void*)vram_start - vram_map),
 					  (unsigned long long)
 					  (gtt_addr - rdev->mc.gtt_start +
 					   (void*)vram_start - vram_map));
 				radeon_bo_kunmap(gtt_obj[i]);
 				goto out_cleanup;
 			}
 		}

 		radeon_bo_kunmap(gtt_obj[i]);

 		DRM_INFO("Tested GTT->VRAM and VRAM->GTT copy for GTT offset 0x%llx\n",
 			 gtt_addr - rdev->mc.gtt_start);
 	}

 out_cleanup:
 	if (vram_obj) {
 		if (radeon_bo_is_reserved(vram_obj)) {
 			radeon_bo_unpin(vram_obj);
 			radeon_bo_unreserve(vram_obj);
 		}
 		radeon_bo_unref(&vram_obj);
 	}
 	if (gtt_obj) {
 		for (i = 0; i < n; i++) {
 			if (gtt_obj[i]) {
 				if (radeon_bo_is_reserved(gtt_obj[i])) {
 					radeon_bo_unpin(gtt_obj[i]);
 					radeon_bo_unreserve(gtt_obj[i]);
 				}
 				radeon_bo_unref(&gtt_obj[i]);
 			}
 		}
 		kfree(gtt_obj);
 	}
 	if (fence) {
 		radeon_fence_unref(&fence);
 	}
 	if (r) {
 		printk(KERN_WARNING "Error while testing BO move.\n");
 	}
 }

 void radeon_test_ring_sync(struct radeon_device *rdev,
 			   struct radeon_ring *ringA,
 			   struct radeon_ring *ringB)
 {
 	struct radeon_fence *fence1 = NULL, *fence2 = NULL;
 	struct radeon_semaphore *semaphore = NULL;
 	int r;

 	r = radeon_semaphore_create(rdev, &semaphore);
 	if (r) {
 		DRM_ERROR("Failed to create semaphore\n");
 		goto out_cleanup;
 	}

 	r = radeon_ring_lock(rdev, ringA, 64);
 	if (r) {
 		DRM_ERROR("Failed to lock ring A %d\n", ringA->idx);
 		goto out_cleanup;
 	}
 	radeon_semaphore_emit_wait(rdev, ringA->idx, semaphore);
 	r = radeon_fence_emit(rdev, &fence1, ringA->idx);
 	if (r) {
 		DRM_ERROR("Failed to emit fence 1\n");
 		radeon_ring_unlock_undo(rdev, ringA);
 		goto out_cleanup;
 	}
 	radeon_semaphore_emit_wait(rdev, ringA->idx, semaphore);
 	r = radeon_fence_emit(rdev, &fence2, ringA->idx);
 	if (r) {
 		DRM_ERROR("Failed to emit fence 2\n");
 		radeon_ring_unlock_undo(rdev, ringA);
 		goto out_cleanup;
 	}
 	radeon_ring_unlock_commit(rdev, ringA);

 	mdelay(1000);

 	if (radeon_fence_signaled(fence1)) {
 		DRM_ERROR("Fence 1 signaled without waiting for semaphore.\n");
 		goto out_cleanup;
 	}

 	r = radeon_ring_lock(rdev, ringB, 64);
 	if (r) {
 		DRM_ERROR("Failed to lock ring B %p\n", ringB);
 		goto out_cleanup;
 	}
 	radeon_semaphore_emit_signal(rdev, ringB->idx, semaphore);
 	radeon_ring_unlock_commit(rdev, ringB);

 	r = radeon_fence_wait(fence1, false);
 	if (r) {
 		DRM_ERROR("Failed to wait for sync fence 1\n");
 		goto out_cleanup;
 	}

 	mdelay(1000);

 	if (radeon_fence_signaled(fence2)) {
 		DRM_ERROR("Fence 2 signaled without waiting for semaphore.\n");
 		goto out_cleanup;
 	}

 	r = radeon_ring_lock(rdev, ringB, 64);
 	if (r) {
 		DRM_ERROR("Failed to lock ring B %p\n", ringB);
 		goto out_cleanup;
 	}
 	radeon_semaphore_emit_signal(rdev, ringB->idx, semaphore);
 	radeon_ring_unlock_commit(rdev, ringB);

 	r = radeon_fence_wait(fence2, false);
 	if (r) {
 		DRM_ERROR("Failed to wait for sync fence 1\n");
 		goto out_cleanup;
 	}

 out_cleanup:
 	radeon_semaphore_free(rdev, &semaphore, NULL);

 	if (fence1)
 		radeon_fence_unref(&fence1);

 	if (fence2)
 		radeon_fence_unref(&fence2);

 	if (r)
 		printk(KERN_WARNING "Error while testing ring sync (%d).\n", r);
 }

 static void radeon_test_ring_sync2(struct radeon_device *rdev,
 			    struct radeon_ring *ringA,
 			    struct radeon_ring *ringB,
 			    struct radeon_ring *ringC)
 {
 	struct radeon_fence *fenceA = NULL, *fenceB = NULL;
 	struct radeon_semaphore *semaphore = NULL;
 	bool sigA, sigB;
 	int i, r;

 	r = radeon_semaphore_create(rdev, &semaphore);
 	if (r) {
 		DRM_ERROR("Failed to create semaphore\n");
 		goto out_cleanup;
 	}

 	r = radeon_ring_lock(rdev, ringA, 64);
 	if (r) {
 		DRM_ERROR("Failed to lock ring A %d\n", ringA->idx);
 		goto out_cleanup;
 	}
 	radeon_semaphore_emit_wait(rdev, ringA->idx, semaphore);
 	r = radeon_fence_emit(rdev, &fenceA, ringA->idx);
 	if (r) {
 		DRM_ERROR("Failed to emit sync fence 1\n");
 		radeon_ring_unlock_undo(rdev, ringA);
 		goto out_cleanup;
 	}
 	radeon_ring_unlock_commit(rdev, ringA);

 	r = radeon_ring_lock(rdev, ringB, 64);
 	if (r) {
 		DRM_ERROR("Failed to lock ring B %d\n", ringB->idx);
 		goto out_cleanup;
 	}
 	radeon_semaphore_emit_wait(rdev, ringB->idx, semaphore);
 	r = radeon_fence_emit(rdev, &fenceB, ringB->idx);
 	if (r) {
 		DRM_ERROR("Failed to create sync fence 2\n");
 		radeon_ring_unlock_undo(rdev, ringB);
 		goto out_cleanup;
 	}
 	radeon_ring_unlock_commit(rdev, ringB);

 	mdelay(1000);

 	if (radeon_fence_signaled(fenceA)) {
 		DRM_ERROR("Fence A signaled without waiting for semaphore.\n");
 		goto out_cleanup;
 	}
 	if (radeon_fence_signaled(fenceB)) {
 		DRM_ERROR("Fence A signaled without waiting for semaphore.\n");
 		goto out_cleanup;
 	}

 	r = radeon_ring_lock(rdev, ringC, 64);
 	if (r) {
 		DRM_ERROR("Failed to lock ring B %p\n", ringC);
 		goto out_cleanup;
 	}
 	radeon_semaphore_emit_signal(rdev, ringC->idx, semaphore);
 	radeon_ring_unlock_commit(rdev, ringC);

 	for (i = 0; i < 30; ++i) {
 		mdelay(100);
 		sigA = radeon_fence_signaled(fenceA);
 		sigB = radeon_fence_signaled(fenceB);
 		if (sigA || sigB)
 			break;
 	}

 	if (!sigA && !sigB) {
 		DRM_ERROR("Neither fence A nor B has been signaled\n");
 		goto out_cleanup;
 	} else if (sigA && sigB) {
 		DRM_ERROR("Both fence A and B has been signaled\n");
 		goto out_cleanup;
 	}

 	DRM_INFO("Fence %c was first signaled\n", sigA ? 'A' : 'B');

 	r = radeon_ring_lock(rdev, ringC, 64);
 	if (r) {
 		DRM_ERROR("Failed to lock ring B %p\n", ringC);
 		goto out_cleanup;
 	}
 	radeon_semaphore_emit_signal(rdev, ringC->idx, semaphore);
 	radeon_ring_unlock_commit(rdev, ringC);

 	mdelay(1000);

 	r = radeon_fence_wait(fenceA, false);
 	if (r) {
 		DRM_ERROR("Failed to wait for sync fence A\n");
 		goto out_cleanup;
 	}
 	r = radeon_fence_wait(fenceB, false);
 	if (r) {
 		DRM_ERROR("Failed to wait for sync fence B\n");
 		goto out_cleanup;
 	}

 out_cleanup:
 	radeon_semaphore_free(rdev, &semaphore, NULL);

 	if (fenceA)
 		radeon_fence_unref(&fenceA);

 	if (fenceB)
 		radeon_fence_unref(&fenceB);

 	if (r)
 		printk(KERN_WARNING "Error while testing ring sync (%d).\n", r);
 }

 void radeon_test_syncing(struct radeon_device *rdev)
 {
 	int i, j, k;

 	for (i = 1; i < RADEON_NUM_RINGS; ++i) {
 		struct radeon_ring *ringA = &rdev->ring[i];
 		if (!ringA->ready)
 			continue;

 		for (j = 0; j < i; ++j) {
 			struct radeon_ring *ringB = &rdev->ring[j];
 			if (!ringB->ready)
 				continue;

 			DRM_INFO("Testing syncing between rings %d and %d...\n", i, j);
 			radeon_test_ring_sync(rdev, ringA, ringB);

 			DRM_INFO("Testing syncing between rings %d and %d...\n", j, i);
 			radeon_test_ring_sync(rdev, ringB, ringA);

 			for (k = 0; k < j; ++k) {
 				struct radeon_ring *ringC = &rdev->ring[k];
 				if (!ringC->ready)
 					continue;

 				DRM_INFO("Testing syncing between rings %d, %d and %d...\n", i, j, k);
 				radeon_test_ring_sync2(rdev, ringA, ringB, ringC);

 				DRM_INFO("Testing syncing between rings %d, %d and %d...\n", i, k, j);
 				radeon_test_ring_sync2(rdev, ringA, ringC, ringB);

 				DRM_INFO("Testing syncing between rings %d, %d and %d...\n", j, i, k);
 				radeon_test_ring_sync2(rdev, ringB, ringA, ringC);

 				DRM_INFO("Testing syncing between rings %d, %d and %d...\n", j, k, i);
 				radeon_test_ring_sync2(rdev, ringB, ringC, ringA);

 				DRM_INFO("Testing syncing between rings %d, %d and %d...\n", k, i, j);
 				radeon_test_ring_sync2(rdev, ringC, ringA, ringB);

 				DRM_INFO("Testing syncing between rings %d, %d and %d...\n", k, j, i);
 				radeon_test_ring_sync2(rdev, ringC, ringB, ringA);
 			}
 		}
 	}
 }
	/*
	* Copyright 2009 VMware, Inc.
	*
	* Permission is hereby granted, free of charge, to any person obtaining a
	* copy of this software and associated documentation files (the "Software"),
	* to deal in the Software without restriction, including without limitation
	* the rights to use, copy, modify, merge, publish, distribute, sublicense,
	* and/or sell copies of the Software, and to permit persons to whom the
	* Software is furnished to do so, subject to the following conditions:
	*
	* The above copyright notice and this permission notice shall be included in
	* all copies or substantial portions of the Software.
	*
	* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
	* IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
	* FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
	* THE COPYRIGHT HOLDER(S) OR AUTHOR(S) BE LIABLE FOR ANY CLAIM, DAMAGES OR
	* OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE,
	* ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR
	* OTHER DEALINGS IN THE SOFTWARE.
	*
	* Authors: Michel Dänzer
	*/
	#include <drm/drmP.h>
	#include <drm/radeon_drm.h>
	#include "radeon_reg.h"
	#include "radeon.h"


	/* Test BO GTT->VRAM and VRAM->GTT GPU copies across the whole GTT aperture */
	void radeon_test_moves(struct radeon_device *rdev)
	{
	struct radeon_bo *vram_obj = NULL;
	struct radeon_bo **gtt_obj = NULL;
	struct radeon_fence *fence = NULL;
	uint64_t gtt_addr, vram_addr;
	unsigned i, n, size;
	int r;

	size = 1024 * 1024;

	/* Number of tests =
	* (Total GTT - IB pool - writeback page - ring buffers) / test size
	*/
	n = rdev->mc.gtt_size - RADEON_IB_POOL_SIZE641024;
	for (i = 0; i < RADEON_NUM_RINGS; ++i)
	n -= rdev->ring[i].ring_size;
	if (rdev->wb.wb_obj)
	n -= RADEON_GPU_PAGE_SIZE;
	if (rdev->ih.ring_obj)
	n -= rdev->ih.ring_size;
	n /= size;

	gtt_obj = kzalloc(n * sizeof(*gtt_obj), GFP_KERNEL);
	if (!gtt_obj) {
	DRM_ERROR("Failed to allocate %d pointers\n", n);
	r = 1;
	goto out_cleanup;
	}

	r = radeon_bo_create(rdev, size, PAGE_SIZE, true, RADEON_GEM_DOMAIN_VRAM,
	NULL, &vram_obj);
	if (r) {
	DRM_ERROR("Failed to create VRAM object\n");
	goto out_cleanup;
	}
	r = radeon_bo_reserve(vram_obj, false);
	if (unlikely(r != 0))
	goto out_cleanup;
	r = radeon_bo_pin(vram_obj, RADEON_GEM_DOMAIN_VRAM, &vram_addr);
	if (r) {
	DRM_ERROR("Failed to pin VRAM object\n");
	goto out_cleanup;
	}
	for (i = 0; i < n; i++) {
	void gtt_map, vram_map;
	void gtt_start, gtt_end;
	void vram_start, vram_end;

	r = radeon_bo_create(rdev, size, PAGE_SIZE, true,
	RADEON_GEM_DOMAIN_GTT, NULL, gtt_obj + i);
	if (r) {
	DRM_ERROR("Failed to create GTT object %d\n", i);
	goto out_cleanup;
	}

	r = radeon_bo_reserve(gtt_obj[i], false);
	if (unlikely(r != 0))
	goto out_cleanup;
	r = radeon_bo_pin(gtt_obj[i], RADEON_GEM_DOMAIN_GTT, &gtt_addr);
	if (r) {
	DRM_ERROR("Failed to pin GTT object %d\n", i);
	goto out_cleanup;
	}

	r = radeon_bo_kmap(gtt_obj[i], &gtt_map);
	if (r) {
	DRM_ERROR("Failed to map GTT object %d\n", i);
	goto out_cleanup;
	}

	for (gtt_start = gtt_map, gtt_end = gtt_map + size;
	gtt_start < gtt_end;
	gtt_start++)
	*gtt_start = gtt_start;

	radeon_bo_kunmap(gtt_obj[i]);

	r = radeon_copy(rdev, gtt_addr, vram_addr, size / RADEON_GPU_PAGE_SIZE, &fence);
	if (r) {
	DRM_ERROR("Failed GTT->VRAM copy %d\n", i);
	goto out_cleanup;
	}

	r = radeon_fence_wait(fence, false);
	if (r) {
	DRM_ERROR("Failed to wait for GTT->VRAM fence %d\n", i);
	goto out_cleanup;
	}

	radeon_fence_unref(&fence);

	r = radeon_bo_kmap(vram_obj, &vram_map);
	if (r) {
	DRM_ERROR("Failed to map VRAM object after copy %d\n", i);
	goto out_cleanup;
	}

	for (gtt_start = gtt_map, gtt_end = gtt_map + size,
	vram_start = vram_map, vram_end = vram_map + size;
	vram_start < vram_end;
	gtt_start++, vram_start++) {
	if (*vram_start != gtt_start) {
	DRM_ERROR("Incorrect GTT->VRAM copy %d: Got 0x%p, "
	"expected 0x%p (GTT/VRAM offset "
	"0x%16llx/0x%16llx)\n",
	i, *vram_start, gtt_start,
	(unsigned long long)
	(gtt_addr - rdev->mc.gtt_start +
	(void*)gtt_start - gtt_map),
	(unsigned long long)
	(vram_addr - rdev->mc.vram_start +
	(void*)gtt_start - gtt_map));
	radeon_bo_kunmap(vram_obj);
	goto out_cleanup;
	}
	*vram_start = vram_start;
	}

	radeon_bo_kunmap(vram_obj);

	r = radeon_copy(rdev, vram_addr, gtt_addr, size / RADEON_GPU_PAGE_SIZE, &fence);
	if (r) {
	DRM_ERROR("Failed VRAM->GTT copy %d\n", i);
	goto out_cleanup;
	}

	r = radeon_fence_wait(fence, false);
	if (r) {
	DRM_ERROR("Failed to wait for VRAM->GTT fence %d\n", i);
	goto out_cleanup;
	}

	radeon_fence_unref(&fence);

	r = radeon_bo_kmap(gtt_obj[i], &gtt_map);
	if (r) {
	DRM_ERROR("Failed to map GTT object after copy %d\n", i);
	goto out_cleanup;
	}

	for (gtt_start = gtt_map, gtt_end = gtt_map + size,
	vram_start = vram_map, vram_end = vram_map + size;
	gtt_start < gtt_end;
	gtt_start++, vram_start++) {
	if (*gtt_start != vram_start) {
	DRM_ERROR("Incorrect VRAM->GTT copy %d: Got 0x%p, "
	"expected 0x%p (VRAM/GTT offset "
	"0x%16llx/0x%16llx)\n",
	i, *gtt_start, vram_start,
	(unsigned long long)
	(vram_addr - rdev->mc.vram_start +
	(void*)vram_start - vram_map),
	(unsigned long long)
	(gtt_addr - rdev->mc.gtt_start +
	(void*)vram_start - vram_map));
	radeon_bo_kunmap(gtt_obj[i]);
	goto out_cleanup;
	}
	}

	radeon_bo_kunmap(gtt_obj[i]);

	DRM_INFO("Tested GTT->VRAM and VRAM->GTT copy for GTT offset 0x%llx\n",
	gtt_addr - rdev->mc.gtt_start);
	}

	out_cleanup:
	if (vram_obj) {
	if (radeon_bo_is_reserved(vram_obj)) {
	radeon_bo_unpin(vram_obj);
	radeon_bo_unreserve(vram_obj);
	}
	radeon_bo_unref(&vram_obj);
	}
	if (gtt_obj) {
	for (i = 0; i < n; i++) {
	if (gtt_obj[i]) {
	if (radeon_bo_is_reserved(gtt_obj[i])) {
	radeon_bo_unpin(gtt_obj[i]);
	radeon_bo_unreserve(gtt_obj[i]);
	}
	radeon_bo_unref(&gtt_obj[i]);
	}
	}
	kfree(gtt_obj);
	}
	if (fence) {
	radeon_fence_unref(&fence);
	}
	if (r) {
	printk(KERN_WARNING "Error while testing BO move.\n");
	}
	}

	void radeon_test_ring_sync(struct radeon_device *rdev,
	struct radeon_ring *ringA,
	struct radeon_ring *ringB)
	{
	struct radeon_fence fence1 = NULL, fence2 = NULL;
	struct radeon_semaphore *semaphore = NULL;
	int r;

	r = radeon_semaphore_create(rdev, &semaphore);
	if (r) {
	DRM_ERROR("Failed to create semaphore\n");
	goto out_cleanup;
	}

	r = radeon_ring_lock(rdev, ringA, 64);
	if (r) {
	DRM_ERROR("Failed to lock ring A %d\n", ringA->idx);
	goto out_cleanup;
	}
	radeon_semaphore_emit_wait(rdev, ringA->idx, semaphore);
	r = radeon_fence_emit(rdev, &fence1, ringA->idx);
	if (r) {
	DRM_ERROR("Failed to emit fence 1\n");
	radeon_ring_unlock_undo(rdev, ringA);
	goto out_cleanup;
	}
	radeon_semaphore_emit_wait(rdev, ringA->idx, semaphore);
	r = radeon_fence_emit(rdev, &fence2, ringA->idx);
	if (r) {
	DRM_ERROR("Failed to emit fence 2\n");
	radeon_ring_unlock_undo(rdev, ringA);
	goto out_cleanup;
	}
	radeon_ring_unlock_commit(rdev, ringA);

	mdelay(1000);

	if (radeon_fence_signaled(fence1)) {
	DRM_ERROR("Fence 1 signaled without waiting for semaphore.\n");
	goto out_cleanup;
	}

	r = radeon_ring_lock(rdev, ringB, 64);
	if (r) {
	DRM_ERROR("Failed to lock ring B %p\n", ringB);
	goto out_cleanup;
	}
	radeon_semaphore_emit_signal(rdev, ringB->idx, semaphore);
	radeon_ring_unlock_commit(rdev, ringB);

	r = radeon_fence_wait(fence1, false);
	if (r) {
	DRM_ERROR("Failed to wait for sync fence 1\n");
	goto out_cleanup;
	}

	mdelay(1000);

	if (radeon_fence_signaled(fence2)) {
	DRM_ERROR("Fence 2 signaled without waiting for semaphore.\n");
	goto out_cleanup;
	}

	r = radeon_ring_lock(rdev, ringB, 64);
	if (r) {
	DRM_ERROR("Failed to lock ring B %p\n", ringB);
	goto out_cleanup;
	}
	radeon_semaphore_emit_signal(rdev, ringB->idx, semaphore);
	radeon_ring_unlock_commit(rdev, ringB);

	r = radeon_fence_wait(fence2, false);
	if (r) {
	DRM_ERROR("Failed to wait for sync fence 1\n");
	goto out_cleanup;
	}

	out_cleanup:
	radeon_semaphore_free(rdev, &semaphore, NULL);

	if (fence1)
	radeon_fence_unref(&fence1);

	if (fence2)
	radeon_fence_unref(&fence2);

	if (r)
	printk(KERN_WARNING "Error while testing ring sync (%d).\n", r);
	}

	static void radeon_test_ring_sync2(struct radeon_device *rdev,
	struct radeon_ring *ringA,
	struct radeon_ring *ringB,
	struct radeon_ring *ringC)
	{
	struct radeon_fence fenceA = NULL, fenceB = NULL;
	struct radeon_semaphore *semaphore = NULL;
	bool sigA, sigB;
	int i, r;

	r = radeon_semaphore_create(rdev, &semaphore);
	if (r) {
	DRM_ERROR("Failed to create semaphore\n");
	goto out_cleanup;
	}

	r = radeon_ring_lock(rdev, ringA, 64);
	if (r) {
	DRM_ERROR("Failed to lock ring A %d\n", ringA->idx);
	goto out_cleanup;
	}
	radeon_semaphore_emit_wait(rdev, ringA->idx, semaphore);
	r = radeon_fence_emit(rdev, &fenceA, ringA->idx);
	if (r) {
	DRM_ERROR("Failed to emit sync fence 1\n");
	radeon_ring_unlock_undo(rdev, ringA);
	goto out_cleanup;
	}
	radeon_ring_unlock_commit(rdev, ringA);

	r = radeon_ring_lock(rdev, ringB, 64);
	if (r) {
	DRM_ERROR("Failed to lock ring B %d\n", ringB->idx);
	goto out_cleanup;
	}
	radeon_semaphore_emit_wait(rdev, ringB->idx, semaphore);
	r = radeon_fence_emit(rdev, &fenceB, ringB->idx);
	if (r) {
	DRM_ERROR("Failed to create sync fence 2\n");
	radeon_ring_unlock_undo(rdev, ringB);
	goto out_cleanup;
	}
	radeon_ring_unlock_commit(rdev, ringB);

	mdelay(1000);

	if (radeon_fence_signaled(fenceA)) {
	DRM_ERROR("Fence A signaled without waiting for semaphore.\n");
	goto out_cleanup;
	}
	if (radeon_fence_signaled(fenceB)) {
	DRM_ERROR("Fence A signaled without waiting for semaphore.\n");
	goto out_cleanup;
	}

	r = radeon_ring_lock(rdev, ringC, 64);
	if (r) {
	DRM_ERROR("Failed to lock ring B %p\n", ringC);
	goto out_cleanup;
	}
	radeon_semaphore_emit_signal(rdev, ringC->idx, semaphore);
	radeon_ring_unlock_commit(rdev, ringC);

	for (i = 0; i < 30; ++i) {
	mdelay(100);
	sigA = radeon_fence_signaled(fenceA);
	sigB = radeon_fence_signaled(fenceB);
	if (sigA \|\| sigB)
	break;
	}

	if (!sigA && !sigB) {
	DRM_ERROR("Neither fence A nor B has been signaled\n");
	goto out_cleanup;
	} else if (sigA && sigB) {
	DRM_ERROR("Both fence A and B has been signaled\n");
	goto out_cleanup;
	}

	DRM_INFO("Fence %c was first signaled\n", sigA ? 'A' : 'B');

	r = radeon_ring_lock(rdev, ringC, 64);
	if (r) {
	DRM_ERROR("Failed to lock ring B %p\n", ringC);
	goto out_cleanup;
	}
	radeon_semaphore_emit_signal(rdev, ringC->idx, semaphore);
	radeon_ring_unlock_commit(rdev, ringC);

	mdelay(1000);

	r = radeon_fence_wait(fenceA, false);
	if (r) {
	DRM_ERROR("Failed to wait for sync fence A\n");
	goto out_cleanup;
	}
	r = radeon_fence_wait(fenceB, false);
	if (r) {
	DRM_ERROR("Failed to wait for sync fence B\n");
	goto out_cleanup;
	}

	out_cleanup:
	radeon_semaphore_free(rdev, &semaphore, NULL);

	if (fenceA)
	radeon_fence_unref(&fenceA);

	if (fenceB)
	radeon_fence_unref(&fenceB);

	if (r)
	printk(KERN_WARNING "Error while testing ring sync (%d).\n", r);
	}

	void radeon_test_syncing(struct radeon_device *rdev)
	{
	int i, j, k;

	for (i = 1; i < RADEON_NUM_RINGS; ++i) {
	struct radeon_ring *ringA = &rdev->ring[i];
	if (!ringA->ready)
	continue;

	for (j = 0; j < i; ++j) {
	struct radeon_ring *ringB = &rdev->ring[j];
	if (!ringB->ready)
	continue;

	DRM_INFO("Testing syncing between rings %d and %d...\n", i, j);
	radeon_test_ring_sync(rdev, ringA, ringB);

	DRM_INFO("Testing syncing between rings %d and %d...\n", j, i);
	radeon_test_ring_sync(rdev, ringB, ringA);

	for (k = 0; k < j; ++k) {
	struct radeon_ring *ringC = &rdev->ring[k];
	if (!ringC->ready)
	continue;

	DRM_INFO("Testing syncing between rings %d, %d and %d...\n", i, j, k);
	radeon_test_ring_sync2(rdev, ringA, ringB, ringC);

	DRM_INFO("Testing syncing between rings %d, %d and %d...\n", i, k, j);
	radeon_test_ring_sync2(rdev, ringA, ringC, ringB);

	DRM_INFO("Testing syncing between rings %d, %d and %d...\n", j, i, k);
	radeon_test_ring_sync2(rdev, ringB, ringA, ringC);

	DRM_INFO("Testing syncing between rings %d, %d and %d...\n", j, k, i);
	radeon_test_ring_sync2(rdev, ringB, ringC, ringA);

	DRM_INFO("Testing syncing between rings %d, %d and %d...\n", k, i, j);
	radeon_test_ring_sync2(rdev, ringC, ringA, ringB);

	DRM_INFO("Testing syncing between rings %d, %d and %d...\n", k, j, i);
	radeon_test_ring_sync2(rdev, ringC, ringB, ringA);
	}
	}
	}
	}