1 /*- 2 * Copyright (c) 2016 Microsoft Corp. 3 * All rights reserved. 4 * 5 * Redistribution and use in source and binary forms, with or without 6 * modification, are permitted provided that the following conditions 7 * are met: 8 * 1. Redistributions of source code must retain the above copyright 9 * notice unmodified, this list of conditions, and the following 10 * disclaimer. 11 * 2. Redistributions in binary form must reproduce the above copyright 12 * notice, this list of conditions and the following disclaimer in the 13 * documentation and/or other materials provided with the distribution. 14 * 15 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR 16 * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES 17 * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. 18 * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, 19 * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT 20 * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, 21 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY 22 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT 23 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF 24 * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. 25 */ 26 27 #ifndef _VMBUS_XACT_H_ 28 #define _VMBUS_XACT_H_ 29 30 #include <sys/param.h> 31 #include <sys/bus.h> 32 33 struct vmbus_xact; 34 struct vmbus_xact_ctx; 35 36 struct vmbus_xact_ctx *vmbus_xact_ctx_create(bus_dma_tag_t dtag, 37 size_t req_size, size_t resp_size, 38 size_t priv_size); 39 void vmbus_xact_ctx_destroy(struct vmbus_xact_ctx *ctx); 40 bool vmbus_xact_ctx_orphan(struct vmbus_xact_ctx *ctx); 41 42 struct vmbus_xact *vmbus_xact_get(struct vmbus_xact_ctx *ctx, 43 size_t req_len); 44 void vmbus_xact_put(struct vmbus_xact *xact); 45 46 void *vmbus_xact_req_data(const struct vmbus_xact *xact); 47 bus_addr_t vmbus_xact_req_paddr(const struct vmbus_xact *xact); 48 void *vmbus_xact_priv(const struct vmbus_xact *xact, 49 size_t priv_len); 50 void vmbus_xact_activate(struct vmbus_xact *xact); 51 void vmbus_xact_deactivate(struct vmbus_xact *xact); 52 const void *vmbus_xact_wait(struct vmbus_xact *xact, 53 size_t *resp_len); 54 const void *vmbus_xact_busywait(struct vmbus_xact *xact, 55 size_t *resp_len); 56 const void *vmbus_xact_poll(struct vmbus_xact *xact, 57 size_t *resp_len); 58 void vmbus_xact_wakeup(struct vmbus_xact *xact, 59 const void *data, size_t dlen); 60 void vmbus_xact_ctx_wakeup(struct vmbus_xact_ctx *ctx, 61 const void *data, size_t dlen); 62 63 #endif /* !_VMBUS_XACT_H_ */ 64