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