26 void intel_ring_reset(struct intel_ring *ring, u32 tail);
91 assert_ring_tail_valid(const struct intel_ring *ring, unsigned int tail)  in assert_ring_tail_valid()  argument
95 	GEM_BUG_ON(!intel_ring_offset_valid(ring, tail));  in assert_ring_tail_valid()
102 	 * "If the Ring Buffer Head Pointer and the Tail Pointer are on the  in assert_ring_tail_valid()
103 	 * same cacheline, the Head Pointer must not be greater than the Tail  in assert_ring_tail_valid()
112 	GEM_BUG_ON(cacheline(tail) == cacheline(head) && tail < head);  in assert_ring_tail_valid()
117 intel_ring_set_tail(struct intel_ring *ring, unsigned int tail)  in intel_ring_set_tail()  argument
119 	/* Whilst writes to the tail are strictly order, there is no  in intel_ring_set_tail()
120 	 * serialisation between readers and the writers. The tail may be  in intel_ring_set_tail()
125 	assert_ring_tail_valid(ring, tail);  in intel_ring_set_tail()
126 	ring->tail = tail;  in intel_ring_set_tail()
127 	return tail;  in intel_ring_set_tail()
131 __intel_ring_space(unsigned int head, unsigned int tail, unsigned int size)  in __intel_ring_space()  argument
134 	 * "If the Ring Buffer Head Pointer and the Tail Pointer are on the  in __intel_ring_space()
135 	 * same cacheline, the Head Pointer must not be greater than the Tail  in __intel_ring_space()
139 	return (head - tail - CACHELINE_BYTES) & (size - 1);  in __intel_ring_space()