1 /*- 2 * SPDX-License-Identifier: BSD-2-Clause-FreeBSD 3 * 4 * Copyright (c) 2012 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 * $FreeBSD$ 29 */ 30 31 #include <sys/cdefs.h> 32 __FBSDID("$FreeBSD$"); 33 34 #include <sys/types.h> 35 36 #include <stdio.h> 37 38 #include "bhyverun.h" 39 #include "debug.h" 40 #include "pci_emul.h" 41 #include "uart_emul.h" 42 43 /* 44 * Pick a PCI vid/did of a chip with a single uart at 45 * BAR0, that most versions of FreeBSD can understand: 46 * Siig CyberSerial 1-port. 47 */ 48 #define COM_VENDOR 0x131f 49 #define COM_DEV 0x2000 50 51 static void 52 pci_uart_intr_assert(void *arg) 53 { 54 struct pci_devinst *pi = arg; 55 56 pci_lintr_assert(pi); 57 } 58 59 static void 60 pci_uart_intr_deassert(void *arg) 61 { 62 struct pci_devinst *pi = arg; 63 64 pci_lintr_deassert(pi); 65 } 66 67 static void 68 pci_uart_write(struct vmctx *ctx, int vcpu, struct pci_devinst *pi, 69 int baridx, uint64_t offset, int size, uint64_t value) 70 { 71 72 assert(baridx == 0); 73 assert(size == 1); 74 75 uart_write(pi->pi_arg, offset, value); 76 } 77 78 uint64_t 79 pci_uart_read(struct vmctx *ctx, int vcpu, struct pci_devinst *pi, 80 int baridx, uint64_t offset, int size) 81 { 82 uint8_t val; 83 84 assert(baridx == 0); 85 assert(size == 1); 86 87 val = uart_read(pi->pi_arg, offset); 88 return (val); 89 } 90 91 static int 92 pci_uart_init(struct vmctx *ctx, struct pci_devinst *pi, char *opts) 93 { 94 struct uart_softc *sc; 95 96 pci_emul_alloc_bar(pi, 0, PCIBAR_IO, UART_IO_BAR_SIZE); 97 pci_lintr_request(pi); 98 99 /* initialize config space */ 100 pci_set_cfgdata16(pi, PCIR_DEVICE, COM_DEV); 101 pci_set_cfgdata16(pi, PCIR_VENDOR, COM_VENDOR); 102 pci_set_cfgdata8(pi, PCIR_CLASS, PCIC_SIMPLECOMM); 103 104 sc = uart_init(pci_uart_intr_assert, pci_uart_intr_deassert, pi); 105 pi->pi_arg = sc; 106 107 if (uart_set_backend(sc, opts) != 0) { 108 EPRINTLN("Unable to initialize backend '%s' for " 109 "pci uart at %d:%d", opts, pi->pi_slot, pi->pi_func); 110 return (-1); 111 } 112 113 return (0); 114 } 115 116 struct pci_devemu pci_de_com = { 117 .pe_emu = "uart", 118 .pe_init = pci_uart_init, 119 .pe_barwrite = pci_uart_write, 120 .pe_barread = pci_uart_read 121 }; 122 PCI_EMUL_SET(pci_de_com); 123