1 /*- 2 * SPDX-License-Identifier: BSD-2-Clause 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 29 #include <sys/cdefs.h> 30 31 #include <sys/types.h> 32 33 #include <stdio.h> 34 35 #include "bhyverun.h" 36 #include "config.h" 37 #include "debug.h" 38 #include "pci_emul.h" 39 #include "uart_emul.h" 40 41 /* 42 * Pick a PCI vid/did of a chip with a single uart at 43 * BAR0, that most versions of FreeBSD can understand: 44 * Siig CyberSerial 1-port. 45 */ 46 #define COM_VENDOR 0x131f 47 #define COM_DEV 0x2000 48 49 static void 50 pci_uart_intr_assert(void *arg) 51 { 52 struct pci_devinst *pi = arg; 53 54 pci_lintr_assert(pi); 55 } 56 57 static void 58 pci_uart_intr_deassert(void *arg) 59 { 60 struct pci_devinst *pi = arg; 61 62 pci_lintr_deassert(pi); 63 } 64 65 static void 66 pci_uart_write(struct pci_devinst *pi, int baridx, uint64_t offset, int size, 67 uint64_t value) 68 { 69 assert(baridx == 0); 70 assert(size == 1); 71 72 uart_write(pi->pi_arg, offset, value); 73 } 74 75 static uint64_t 76 pci_uart_read(struct pci_devinst *pi, int baridx, uint64_t offset, int size) 77 { 78 uint8_t val; 79 80 assert(baridx == 0); 81 assert(size == 1); 82 83 val = uart_read(pi->pi_arg, offset); 84 return (val); 85 } 86 87 static int 88 pci_uart_legacy_config(nvlist_t *nvl, const char *opts) 89 { 90 91 if (opts != NULL) 92 set_config_value_node(nvl, "path", opts); 93 return (0); 94 } 95 96 static int 97 pci_uart_init(struct pci_devinst *pi, nvlist_t *nvl) 98 { 99 struct uart_softc *sc; 100 const char *device; 101 102 pci_emul_alloc_bar(pi, 0, PCIBAR_IO, UART_IO_BAR_SIZE); 103 pci_lintr_request(pi); 104 105 /* initialize config space */ 106 pci_set_cfgdata16(pi, PCIR_DEVICE, COM_DEV); 107 pci_set_cfgdata16(pi, PCIR_VENDOR, COM_VENDOR); 108 pci_set_cfgdata8(pi, PCIR_CLASS, PCIC_SIMPLECOMM); 109 110 sc = uart_init(pci_uart_intr_assert, pci_uart_intr_deassert, pi); 111 pi->pi_arg = sc; 112 113 device = get_config_value_node(nvl, "path"); 114 if (uart_set_backend(sc, device) != 0) { 115 EPRINTLN("Unable to initialize backend '%s' for " 116 "pci uart at %d:%d", device, pi->pi_slot, pi->pi_func); 117 return (-1); 118 } 119 120 return (0); 121 } 122 123 static const struct pci_devemu pci_de_com = { 124 .pe_emu = "uart", 125 .pe_init = pci_uart_init, 126 .pe_legacy_config = pci_uart_legacy_config, 127 .pe_barwrite = pci_uart_write, 128 .pe_barread = pci_uart_read 129 }; 130 PCI_EMUL_SET(pci_de_com); 131