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
33 static int gic_irqs[4];
34
35 void
pci_irq_init(int intrs[static4])36 pci_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
44 void
pci_irq_assert(struct pci_devinst * pi)45 pci_irq_assert(struct pci_devinst *pi)
46 {
47 vm_assert_irq(pi->pi_vmctx, pi->pi_lintr.irq.gic_irq);
48 }
49
50 void
pci_irq_deassert(struct pci_devinst * pi)51 pci_irq_deassert(struct pci_devinst *pi)
52 {
53 vm_deassert_irq(pi->pi_vmctx, pi->pi_lintr.irq.gic_irq);
54 }
55
56 void
pci_irq_route(struct pci_devinst * pi,struct pci_irq * irq)57 pci_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