1 /*- 2 * SPDX-License-Identifier: BSD-2-Clause 3 * 4 * Copyright (c) 2011 NetApp, 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, this list of conditions and the following disclaimer. 12 * 2. Redistributions in binary form must reproduce the above copyright 13 * notice, this list of conditions and the following disclaimer in the 14 * documentation and/or other materials provided with the distribution. 15 * 16 * THIS SOFTWARE IS PROVIDED BY NETAPP, INC ``AS IS'' AND 17 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 18 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 19 * ARE DISCLAIMED. IN NO EVENT SHALL NETAPP, INC OR CONTRIBUTORS BE LIABLE 20 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 21 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 22 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 23 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 24 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 25 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 26 * SUCH DAMAGE. 27 */ 28 29 #ifndef _INOUT_H_ 30 #define _INOUT_H_ 31 32 #include <sys/linker_set.h> 33 34 struct vcpu; 35 struct vmctx; 36 struct vm_exit; 37 38 /* 39 * inout emulation handlers return 0 on success and -1 on failure. 40 */ 41 typedef int (*inout_func_t)(struct vmctx *ctx, int in, int port, 42 int bytes, uint32_t *eax, void *arg); 43 44 struct inout_port { 45 const char *name; 46 int port; 47 int size; 48 int flags; 49 inout_func_t handler; 50 void *arg; 51 }; 52 #define IOPORT_F_IN 0x1 53 #define IOPORT_F_OUT 0x2 54 #define IOPORT_F_INOUT (IOPORT_F_IN | IOPORT_F_OUT) 55 56 /* 57 * The following flags are used internally and must not be used by 58 * device models. 59 */ 60 #define IOPORT_F_DEFAULT 0x80000000 /* claimed by default handler */ 61 62 #define INOUT_PORT(name, port, flags, handler) \ 63 static struct inout_port __CONCAT(__inout_port, __LINE__) = { \ 64 #name, \ 65 (port), \ 66 1, \ 67 (flags), \ 68 (handler), \ 69 0 \ 70 }; \ 71 DATA_SET(inout_port_set, __CONCAT(__inout_port, __LINE__)) 72 73 void init_inout(void); 74 int emulate_inout(struct vmctx *ctx, struct vcpu *vcpu, struct vm_exit *vmexit); 75 int register_inout(struct inout_port *iop); 76 int unregister_inout(struct inout_port *iop); 77 78 #endif /* _INOUT_H_ */ 79