136 lines
3.5 KiB
C
136 lines
3.5 KiB
C
/*-
|
|
* SPDX-License-Identifier: BSD-2-Clause-FreeBSD
|
|
*
|
|
* Copyright (c) 2012 NetApp, Inc.
|
|
* All rights reserved.
|
|
*
|
|
* Redistribution and use in source and binary forms, with or without
|
|
* modification, are permitted provided that the following conditions
|
|
* are met:
|
|
* 1. Redistributions of source code must retain the above copyright
|
|
* notice, this list of conditions and the following disclaimer.
|
|
* 2. Redistributions in binary form must reproduce the above copyright
|
|
* notice, this list of conditions and the following disclaimer in the
|
|
* documentation and/or other materials provided with the distribution.
|
|
*
|
|
* THIS SOFTWARE IS PROVIDED BY NETAPP, INC ``AS IS'' AND
|
|
* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
|
|
* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
|
|
* ARE DISCLAIMED. IN NO EVENT SHALL NETAPP, INC OR CONTRIBUTORS BE LIABLE
|
|
* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
|
|
* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
|
|
* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
|
|
* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
|
|
* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
|
|
* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
|
|
* SUCH DAMAGE.
|
|
*
|
|
* $FreeBSD$
|
|
*/
|
|
|
|
#include <sys/cdefs.h>
|
|
__FBSDID("$FreeBSD$");
|
|
|
|
#include <sys/types.h>
|
|
|
|
#include <stdio.h>
|
|
|
|
#include "bhyverun.h"
|
|
#include "config.h"
|
|
#include "debug.h"
|
|
#include "pci_emul.h"
|
|
#include "uart_emul.h"
|
|
|
|
/*
|
|
* Pick a PCI vid/did of a chip with a single uart at
|
|
* BAR0, that most versions of FreeBSD can understand:
|
|
* Siig CyberSerial 1-port.
|
|
*/
|
|
#define COM_VENDOR 0x131f
|
|
#define COM_DEV 0x2000
|
|
|
|
static void
|
|
pci_uart_intr_assert(void *arg)
|
|
{
|
|
struct pci_devinst *pi = arg;
|
|
|
|
pci_lintr_assert(pi);
|
|
}
|
|
|
|
static void
|
|
pci_uart_intr_deassert(void *arg)
|
|
{
|
|
struct pci_devinst *pi = arg;
|
|
|
|
pci_lintr_deassert(pi);
|
|
}
|
|
|
|
static void
|
|
pci_uart_write(struct vmctx *ctx __unused, int vcpu __unused,
|
|
struct pci_devinst *pi, int baridx, uint64_t offset, int size,
|
|
uint64_t value)
|
|
{
|
|
assert(baridx == 0);
|
|
assert(size == 1);
|
|
|
|
uart_write(pi->pi_arg, offset, value);
|
|
}
|
|
|
|
static uint64_t
|
|
pci_uart_read(struct vmctx *ctx __unused, int vcpu __unused,
|
|
struct pci_devinst *pi, int baridx, uint64_t offset, int size)
|
|
{
|
|
uint8_t val;
|
|
|
|
assert(baridx == 0);
|
|
assert(size == 1);
|
|
|
|
val = uart_read(pi->pi_arg, offset);
|
|
return (val);
|
|
}
|
|
|
|
static int
|
|
pci_uart_legacy_config(nvlist_t *nvl, const char *opts)
|
|
{
|
|
|
|
if (opts != NULL)
|
|
set_config_value_node(nvl, "path", opts);
|
|
return (0);
|
|
}
|
|
|
|
static int
|
|
pci_uart_init(struct vmctx *ctx __unused, struct pci_devinst *pi, nvlist_t *nvl)
|
|
{
|
|
struct uart_softc *sc;
|
|
const char *device;
|
|
|
|
pci_emul_alloc_bar(pi, 0, PCIBAR_IO, UART_IO_BAR_SIZE);
|
|
pci_lintr_request(pi);
|
|
|
|
/* initialize config space */
|
|
pci_set_cfgdata16(pi, PCIR_DEVICE, COM_DEV);
|
|
pci_set_cfgdata16(pi, PCIR_VENDOR, COM_VENDOR);
|
|
pci_set_cfgdata8(pi, PCIR_CLASS, PCIC_SIMPLECOMM);
|
|
|
|
sc = uart_init(pci_uart_intr_assert, pci_uart_intr_deassert, pi);
|
|
pi->pi_arg = sc;
|
|
|
|
device = get_config_value_node(nvl, "path");
|
|
if (uart_set_backend(sc, device) != 0) {
|
|
EPRINTLN("Unable to initialize backend '%s' for "
|
|
"pci uart at %d:%d", device, pi->pi_slot, pi->pi_func);
|
|
return (-1);
|
|
}
|
|
|
|
return (0);
|
|
}
|
|
|
|
static const struct pci_devemu pci_de_com = {
|
|
.pe_emu = "uart",
|
|
.pe_init = pci_uart_init,
|
|
.pe_legacy_config = pci_uart_legacy_config,
|
|
.pe_barwrite = pci_uart_write,
|
|
.pe_barread = pci_uart_read
|
|
};
|
|
PCI_EMUL_SET(pci_de_com);
|