1/*-
2 * SPDX-License-Identifier: BSD-2-Clause
3 *
4 * Copyright (c) 2024 Jessica Clarke <jrtc27@FreeBSD.org>
5 *
6 * Redistribution and use in source and binary forms, with or without
7 * modification, are permitted provided that the following conditions
8 * are met:
9 * 1. Redistributions of source code must retain the above copyright
10 *    notice, this list of conditions and the following disclaimer.
11 * 2. Redistributions in binary form must reproduce the above copyright
12 *    notice, this list of conditions and the following disclaimer in the
13 *    documentation and/or other materials provided with the distribution.
14 *
15 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
16 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
17 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
18 * ARE DISCLAIMED.  IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
19 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
20 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
21 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
22 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
23 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
24 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
25 * SUCH DAMAGE.
26 */
27
28#include <vmmapi.h>
29
30#include "pci_emul.h"
31#include "pci_irq.h"
32
33static int gic_irqs[4];
34
35void
36pci_irq_init(int intrs[static 4])
37{
38	int i;
39
40	for (i = 0; i < 4; ++i)
41		gic_irqs[i] = intrs[i];
42}
43
44void
45pci_irq_assert(struct pci_devinst *pi)
46{
47	vm_assert_irq(pi->pi_vmctx, pi->pi_lintr.irq.gic_irq);
48}
49
50void
51pci_irq_deassert(struct pci_devinst *pi)
52{
53	vm_deassert_irq(pi->pi_vmctx, pi->pi_lintr.irq.gic_irq);
54}
55
56void
57pci_irq_route(struct pci_devinst *pi, struct pci_irq *irq)
58{
59	/*
60	 * Assign swizzled IRQ for this INTx if one is not yet assigned. Must
61	 * match fdt_add_pcie().
62	 */
63	if (irq->gic_irq == 0)
64		irq->gic_irq =
65		    gic_irqs[(pi->pi_slot + pi->pi_lintr.pin - 1) % 4];
66}
67