1 /*- 2 * Copyright (c) 2012 NetApp, Inc. 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, this list of conditions and the following disclaimer. 10 * 2. Redistributions in binary form must reproduce the above copyright 11 * notice, this list of conditions and the following disclaimer in the 12 * documentation and/or other materials provided with the distribution. 13 * 14 * THIS SOFTWARE IS PROVIDED BY NETAPP, INC ``AS IS'' AND 15 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 16 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 17 * ARE DISCLAIMED. IN NO EVENT SHALL NETAPP, INC OR CONTRIBUTORS BE LIABLE 18 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 19 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 20 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 21 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 22 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 23 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 24 * SUCH DAMAGE. 25 * 26 * $FreeBSD$ 27 */ 28 29 #include <sys/cdefs.h> 30 __FBSDID("$FreeBSD$"); 31 32 #include <sys/types.h> 33 34 #include <stdio.h> 35 36 #include "bhyverun.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 vmctx *ctx, int vcpu, struct pci_devinst *pi, 66 int baridx, uint64_t offset, int size, uint64_t value) 67 { 68 69 assert(baridx == 0); 70 assert(size == 1); 71 72 uart_write(pi->pi_arg, offset, value); 73 } 74 75 uint64_t 76 pci_uart_read(struct vmctx *ctx, int vcpu, struct pci_devinst *pi, 77 int baridx, uint64_t offset, int size) 78 { 79 uint8_t val; 80 81 assert(baridx == 0); 82 assert(size == 1); 83 84 val = uart_read(pi->pi_arg, offset); 85 return (val); 86 } 87 88 static int 89 pci_uart_init(struct vmctx *ctx, struct pci_devinst *pi, char *opts) 90 { 91 struct uart_softc *sc; 92 93 pci_emul_alloc_bar(pi, 0, PCIBAR_IO, UART_IO_BAR_SIZE); 94 pci_lintr_request(pi); 95 96 /* initialize config space */ 97 pci_set_cfgdata16(pi, PCIR_DEVICE, COM_DEV); 98 pci_set_cfgdata16(pi, PCIR_VENDOR, COM_VENDOR); 99 pci_set_cfgdata8(pi, PCIR_CLASS, PCIC_SIMPLECOMM); 100 101 sc = uart_init(pci_uart_intr_assert, pci_uart_intr_deassert, pi); 102 pi->pi_arg = sc; 103 104 if (uart_set_backend(sc, opts) != 0) { 105 fprintf(stderr, "Unable to initialize backend '%s' for " 106 "pci uart at %d:%d\n", opts, pi->pi_slot, pi->pi_func); 107 return (-1); 108 } 109 110 return (0); 111 } 112 113 struct pci_devemu pci_de_com = { 114 .pe_emu = "uart", 115 .pe_init = pci_uart_init, 116 .pe_barwrite = pci_uart_write, 117 .pe_barread = pci_uart_read 118 }; 119 PCI_EMUL_SET(pci_de_com); 120