1 /*- 2 * Copyright (c) 2009-2012,2016 Microsoft Corp. 3 * Copyright (c) 2012 NetApp Inc. 4 * Copyright (c) 2012 Citrix Inc. 5 * All rights reserved. 6 * 7 * Redistribution and use in source and binary forms, with or without 8 * modification, are permitted provided that the following conditions 9 * are met: 10 * 1. Redistributions of source code must retain the above copyright 11 * notice unmodified, this list of conditions, and the following 12 * disclaimer. 13 * 2. Redistributions in binary form must reproduce the above copyright 14 * notice, this list of conditions and the following disclaimer in the 15 * documentation and/or other materials provided with the distribution. 16 * 17 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR 18 * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES 19 * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. 20 * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, 21 * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT 22 * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, 23 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY 24 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT 25 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF 26 * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. 27 * 28 * $FreeBSD$ 29 */ 30 31 #ifndef _VMBUS_BRVAR_H_ 32 #define _VMBUS_BRVAR_H_ 33 34 #include <sys/param.h> 35 #include <sys/lock.h> 36 #include <sys/mutex.h> 37 #include <sys/_iovec.h> 38 39 typedef struct { 40 struct vmbus_bufring *ring_buffer; 41 struct mtx ring_lock; 42 uint32_t ring_data_size; /* ring_size */ 43 } hv_vmbus_ring_buffer_info; 44 45 struct sysctl_ctx_list; 46 struct sysctl_oid; 47 48 void vmbus_br_sysctl_create(struct sysctl_ctx_list *ctx, 49 struct sysctl_oid *br_tree, hv_vmbus_ring_buffer_info *br, 50 const char *name); 51 52 int hv_vmbus_ring_buffer_init( 53 hv_vmbus_ring_buffer_info *ring_info, 54 void *buffer, 55 uint32_t buffer_len); 56 57 void hv_ring_buffer_cleanup( 58 hv_vmbus_ring_buffer_info *ring_info); 59 60 int hv_ring_buffer_write( 61 hv_vmbus_ring_buffer_info *ring_info, 62 const struct iovec iov[], 63 uint32_t iovlen, 64 boolean_t *need_sig); 65 66 int hv_ring_buffer_peek( 67 hv_vmbus_ring_buffer_info *ring_info, 68 void *buffer, 69 uint32_t buffer_len); 70 71 int hv_ring_buffer_read( 72 hv_vmbus_ring_buffer_info *ring_info, 73 void *buffer, 74 uint32_t buffer_len, 75 uint32_t offset); 76 77 void hv_ring_buffer_read_begin( 78 hv_vmbus_ring_buffer_info *ring_info); 79 80 uint32_t hv_ring_buffer_read_end( 81 hv_vmbus_ring_buffer_info *ring_info); 82 83 #endif /* _VMBUS_BRVAR_H_ */ 84