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/*-
* 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 "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, int vcpu, 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);
}
uint64_t
pci_uart_read(struct vmctx *ctx, int vcpu, 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_nldevs; /* number of legacy uart ports allocated */
static int
pci_uart_init(struct vmctx *ctx, struct pci_devinst *pi, char *opts)
{
struct uart_softc *sc;
int ioaddr, ivec;
if (pci_is_legacy(pi)) {
if (uart_legacy_alloc(pci_uart_nldevs, &ioaddr, &ivec) != 0) {
fprintf(stderr, "Unable to allocate resources for "
"legacy COM%d port at pci device %d:%d\n",
pci_uart_nldevs + 1, pi->pi_slot, pi->pi_func);
return (-1);
}
pci_uart_nldevs++;
pci_emul_alloc_pbar(pi, 0, ioaddr, PCIBAR_IO, UART_IO_BAR_SIZE);
} else {
ivec = -1;
pci_emul_alloc_bar(pi, 0, PCIBAR_IO, UART_IO_BAR_SIZE);
}
pci_lintr_request(pi, ivec);
/* 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;
if (uart_set_backend(sc, opts) != 0) {
fprintf(stderr, "Unable to initialize backend '%s' for "
"pci uart at %d:%d\n", opts, pi->pi_slot, pi->pi_func);
return (-1);
}
return (0);
}
struct pci_devemu pci_de_com = {
.pe_emu = "uart",
.pe_init = pci_uart_init,
.pe_barwrite = pci_uart_write,
.pe_barread = pci_uart_read
};
PCI_EMUL_SET(pci_de_com);
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