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 struct vmbus_br { 40 struct vmbus_bufring *vbr; 41 uint32_t vbr_dsize; /* total data size */ 42 }; 43 44 #define vbr_windex vbr->br_windex 45 #define vbr_rindex vbr->br_rindex 46 #define vbr_imask vbr->br_imask 47 #define vbr_data vbr->br_data 48 49 struct vmbus_rxbr { 50 struct mtx rxbr_lock; 51 struct vmbus_br rxbr; 52 }; 53 54 #define rxbr_windex rxbr.vbr_windex 55 #define rxbr_rindex rxbr.vbr_rindex 56 #define rxbr_imask rxbr.vbr_imask 57 #define rxbr_data rxbr.vbr_data 58 #define rxbr_dsize rxbr.vbr_dsize 59 60 struct vmbus_txbr { 61 struct mtx txbr_lock; 62 struct vmbus_br txbr; 63 }; 64 65 #define txbr_windex txbr.vbr_windex 66 #define txbr_rindex txbr.vbr_rindex 67 #define txbr_imask txbr.vbr_imask 68 #define txbr_data txbr.vbr_data 69 #define txbr_dsize txbr.vbr_dsize 70 71 struct sysctl_ctx_list; 72 struct sysctl_oid; 73 74 static __inline int 75 vmbus_txbr_maxpktsz(const struct vmbus_txbr *tbr) 76 { 77 /* 78 * - 64 bits for the trailing start index (- sizeof(uint64_t)). 79 * - The rindex and windex can't be same (- 1). See 80 * the comment near vmbus_bufring.br_{r,w}index. 81 */ 82 return (tbr->txbr_dsize - sizeof(uint64_t) - 1); 83 } 84 85 void vmbus_br_sysctl_create(struct sysctl_ctx_list *ctx, 86 struct sysctl_oid *br_tree, struct vmbus_br *br, 87 const char *name); 88 89 void vmbus_rxbr_init(struct vmbus_rxbr *rbr); 90 void vmbus_rxbr_deinit(struct vmbus_rxbr *rbr); 91 void vmbus_rxbr_setup(struct vmbus_rxbr *rbr, void *buf, int blen); 92 int vmbus_rxbr_peek(struct vmbus_rxbr *rbr, void *data, int dlen); 93 int vmbus_rxbr_read(struct vmbus_rxbr *rbr, void *data, int dlen, 94 uint32_t skip); 95 void vmbus_rxbr_intr_mask(struct vmbus_rxbr *rbr); 96 uint32_t vmbus_rxbr_intr_unmask(struct vmbus_rxbr *rbr); 97 98 void vmbus_txbr_init(struct vmbus_txbr *tbr); 99 void vmbus_txbr_deinit(struct vmbus_txbr *tbr); 100 void vmbus_txbr_setup(struct vmbus_txbr *tbr, void *buf, int blen); 101 int vmbus_txbr_write(struct vmbus_txbr *tbr, 102 const struct iovec iov[], int iovlen, boolean_t *need_sig); 103 104 #endif /* _VMBUS_BRVAR_H_ */ 105