Differential D27456 Diff 82255 usr.sbin/bhyve/pci_apu-d.c

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usr.sbin/bhyve/pci_apu-d.c

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				/*-
				* SPDX-License-Identifier: BSD-2-Clause-FreeBSD
				*
				* 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/param.h>
				#include <sys/mman.h>

				#include <machine/iodev.h>
				#include <machine/vmm.h>

				#include <err.h>
				#include <errno.h>
				#include <fcntl.h>
				#include <stdio.h>
				#include <stdlib.h>
				#include <string.h>
				#include <sysexits.h>
				#include <unistd.h>

				#include "pci_passthru.h"

				#define VBIOS_ADDR 0xC0000

				#define max(a, b) (((a) > (b)) ? (a) : (b))

				int
				apu_d_init(struct vmctx ctx, struct pci_devinst pi, char *opts)
				{
				int error;
				struct passthru_softc *sc;

				error = 0;

				sc = pi->pi_arg;

				uint16_t vendor, dev_id;
				uint64_t bios_size;
				vendor = read_config(&sc->psc_sel, PCIR_VENDOR, 0x02);
				dev_id = read_config(&sc->psc_sel, PCIR_DEVICE, 0x02);

				/* get VBIOS size */
				if ((error = vm_get_vbios(ctx, sc->psc_sel.pc_bus, sc->psc_sel.pc_dev,
				sc->psc_sel.pc_func, vendor, dev_id, NULL, &bios_size)) != 0) {
				warnx("vm_get_vbios: %x", errno);
				goto done;
				}
				if (bios_size == 0) {
				warnx("Could not determine VBIOS size");
				goto done;
				}

				/*
				* round up size to a power of two
				* check in descendig order to avoid endless loop
				*/
				pi->pi_vbios.len = 1ULL << 63;
				while (pi->pi_vbios.len >= bios_size) {
				pi->pi_vbios.len >>= 1;
				}
				pi->pi_vbios.len <<= 1;
				/* ROM size should be greater than 2 KB */
				pi->pi_vbios.len = max(pi->pi_vbios.len, (~PCIM_BIOS_ADDR_MASK) + 1);

				pi->pi_vbios.gpa = VBIOS_ADDR;
				pi->pi_vbios.hpa = (uint64_t)vm_create_devmem(
				ctx, VM_VIDEOBIOS, "videobios", pi->pi_vbios.len);
				if ((void *)pi->pi_vbios.hpa == MAP_FAILED) {
				warnx("vm_create_devmem: %x", errno);
				error = -1;
				goto done;
				}

				/* get VBIOS */
				if ((error = vm_get_vbios(ctx, sc->psc_sel.pc_bus, sc->psc_sel.pc_dev,
				sc->psc_sel.pc_func, vendor, dev_id, (void *)pi->pi_vbios.hpa,
				&bios_size)) != 0) {
				warnx("vm_get_vbios: %x", errno);
				goto done;
				}

				/* assign a ROM to this device */
				if ((error = pci_emul_alloc_bar(pi, PCI_BARMAX + 1, PCIBAR_ROM, pi->pi_vbios.len)) != 0) {
				warnx("pci_emul_alloc_rom: %x", error);
				goto done;
				}

				done:
				return (error);
				}

				int apu_d_addr_rom(struct pci_devinst *pi, int idx, int enabled)
				{
				int error;

				if (!enabled)
				error = vm_munmap_memseg(pi->pi_vmctx, pi->pi_bar[idx].addr, pi->pi_bar[idx].size);
				else
				error = vm_mmap_memseg(pi->pi_vmctx, pi->pi_bar[idx].addr, VM_VIDEOBIOS, 0, pi->pi_bar[idx].size, PROT_READ \| PROT_EXEC);

				return error;
				}