1 // SPDX-License-Identifier: GPL-2.0
14 	kref_init(&ring->ref);  in mock_ring()
15 	ring->size = sz;  in mock_ring()
16 	ring->wrap = BITS_PER_TYPE(ring->size) - ilog2(sz);  in mock_ring()
17 	ring->effective_size = sz;  in mock_ring()
18 	ring->vaddr = (void *)(ring + 1);  in mock_ring()
19 	atomic_set(&ring->pin_count, 1);  in mock_ring()
39 		result = -1;  in check_ring_direction()
46 		return -EINVAL;  in check_ring_direction()
60 	err |= check_ring_direction(ring, prev, next, -1);  in check_ring_step()
71 	err |= check_ring_step(ring, intel_ring_wrap(ring, x - 1), step);  in check_ring_offset()
79 	unsigned int half = 2048;  in igt_ring_direction()  local
82 	ring = mock_ring(2 * half);  in igt_ring_direction()
84 		return -ENOMEM;  in igt_ring_direction()
86 	GEM_BUG_ON(ring->size != 2 * half);  in igt_ring_direction()
88 	/* Precision of wrap detection is limited to ring->size / 2 */  in igt_ring_direction()
89 	for (step = 1; step < half; step <<= 1) {  in igt_ring_direction()
91 		err |= check_ring_offset(ring, half, step);  in igt_ring_direction()
93 	err |= check_ring_step(ring, 0, half - 64);  in igt_ring_direction()
96 	err |= check_ring_offset(ring, 0, 2 * half + 64);  in igt_ring_direction()
97 	err |= check_ring_offset(ring, 3 * half, 1);  in igt_ring_direction()