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Differential D26209 Diff 79590 usr.sbin/bhyve/pci_igd_lpc.c

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usr.sbin/bhyve/pci_igd_lpc.c

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/*-
* SPDX-License-Identifier: BSD-2-Clause-FreeBSD
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This new file should have a standard copyright header e.g.

/*-
 * SPDX-License-Identifier: BSD-2-Clause-FreeBSD
 *
 * Copyright (c) 2020 <Beckhoff ...>
 *
 * 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 THE AUTHOR AND CONTRIBUTORS ``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 THE AUTHOR 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.
 *
 * $FreeBSD$
 */
emaste: This new file should have a standard copyright header e.g. ``` /*- * SPDX-License-Identifier…
*
* Copyright (c) 2020 Beckhoff Automation GmbH & Co. KG
* 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 THE AUTHOR OR CONTRIBUTORS ``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 THE AUTHOR 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 <sys/pciio.h>
#include <machine/vmm.h>
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <err.h>
#include <errno.h>
#include <fcntl.h>
#include <vmmapi.h>
#include "pci_emul.h"
#ifndef _PATH_DEVPCI
#define _PATH_DEVPCI "/dev/pci"
#endif
int pcifd = -1;
static uint32_t
read_config(long reg, int width)
{
// igd-lpc is always connected to 0:1f.0
struct pci_io pi = {
.pi_sel = {
.pc_dev = 0x1f,
},
.pi_reg = reg,
.pi_width = width,
};
if (ioctl(pcifd, PCIOCREAD, &pi) < 0)
return (0);
return (pi.pi_data);
}
static int
pci_igd_lpc_init(struct vmctx *ctx, struct pci_devinst *pi, char *opts)
{
// only allow igd-lpc on 0:1f.0
if (pi->pi_bus != 0 || pi->pi_slot != 0x1f || pi->pi_func != 0x00) {
warn("igd-lpc only allowed on 0:1f.0");
return (-1);
}
// open host device
if (pcifd < 0) {
pcifd = open(_PATH_DEVPCI, O_RDWR, 0);
if (pcifd < 0) {
warn("failed to open %s", _PATH_DEVPCI);
return (-1);
}
}
/*
* The VID, DID, REVID, SUBVID and SUBDID of igd-lpc need aligned with
* physical one. Without these physical values, GVT-d GOP driver
* couldn't work.
*/
pci_set_cfgdata16(pi, PCIR_DEVICE, read_config(PCIR_DEVICE, 2));
pci_set_cfgdata16(pi, PCIR_VENDOR, read_config(PCIR_VENDOR, 2));
pci_set_cfgdata8(pi, PCIR_REVID, read_config(PCIR_REVID, 1));
pci_set_cfgdata16(pi, PCIR_SUBVEND_0, read_config(PCIR_SUBVEND_0, 2));
pci_set_cfgdata16(pi, PCIR_SUBDEV_0, read_config(PCIR_SUBDEV_0, 2));
return (0);
}
struct pci_devemu pci_de_igd_lpc = { .pe_emu = "igd-lpc",
.pe_init = pci_igd_lpc_init };
PCI_EMUL_SET(pci_de_igd_lpc);