hyperv/vmbus/hv_ring_buffer.c

69 get_next_write_location(hv_vmbus_ring_buffer_info* ring_info)
71 	uint32_t next = ring_info->ring_buffer->write_index;
80 	hv_vmbus_ring_buffer_info*	ring_info,
83 	ring_info->ring_buffer->write_index = next_write_location;
90 get_next_read_location(hv_vmbus_ring_buffer_info* ring_info)
92 	uint32_t next = ring_info->ring_buffer->read_index;
102 	hv_vmbus_ring_buffer_info*	ring_info,
105 	uint32_t next = ring_info->ring_buffer->read_index;
107 	next %= ring_info->ring_data_size;
116 	hv_vmbus_ring_buffer_info*	ring_info,
119 	ring_info->ring_buffer->read_index = next_read_location;
126 get_ring_buffer(hv_vmbus_ring_buffer_info* ring_info)
128 	return (void *) ring_info->ring_buffer->buffer;
135 get_ring_buffer_size(hv_vmbus_ring_buffer_info* ring_info)
137 	return ring_info->ring_data_size;
144 get_ring_buffer_indices(hv_vmbus_ring_buffer_info* ring_info)
146 	return (uint64_t) ring_info->ring_buffer->write_index << 32;
151 	hv_vmbus_ring_buffer_info*	ring_info)
153 	ring_info->ring_buffer->interrupt_mask = 1;
159 	hv_vmbus_ring_buffer_info*	ring_info)
163 	ring_info->ring_buffer->interrupt_mask = 0;
171 	get_ring_buffer_avail_bytes(ring_info, &read, &write);
213 			hv_vmbus_ring_buffer_info*	ring_info,
219 			hv_vmbus_ring_buffer_info*	ring_info,
239 	hv_vmbus_ring_buffer_info*	ring_info,
243 	memset(ring_info, 0, sizeof(hv_vmbus_ring_buffer_info));
245 	ring_info->ring_buffer = (hv_vmbus_ring_buffer*) buffer;
246 	ring_info->ring_buffer->read_index =
247 	    ring_info->ring_buffer->write_index = 0;
249 	ring_info->ring_size = buffer_len;
250 	ring_info->ring_data_size = buffer_len - sizeof(hv_vmbus_ring_buffer);
252 	mtx_init(&ring_info->ring_lock, "vmbus ring buffer", NULL, MTX_SPIN);
260 void hv_ring_buffer_cleanup(hv_vmbus_ring_buffer_info* ring_info)
262 	mtx_destroy(&ring_info->ring_lock);
458 	hv_vmbus_ring_buffer_info*	ring_info,
463 	char *ring_buffer = get_ring_buffer(ring_info);
464 	uint32_t ring_buffer_size = get_ring_buffer_size(ring_info);
489 	hv_vmbus_ring_buffer_info*	ring_info,
495 	char *ring_buffer = get_ring_buffer(ring_info);
496 	uint32_t ring_buffer_size = get_ring_buffer_size(ring_info);