1 /*
2 * Copyright (c) 2013 Roger Pau Monné <[email protected]>
3 * All rights reserved.
4 *
5 * Redistribution and use in source and binary forms, with or without
6 * modification, are permitted provided that the following conditions
7 * are met:
8 * 1. Redistributions of source code must retain the above copyright
9 * notice, this list of conditions and the following disclaimer.
10 * 2. Redistributions in binary form must reproduce the above copyright
11 * notice, this list of conditions and the following disclaimer in the
12 * documentation and/or other materials provided with the distribution.
13 *
14 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS AS IS'' AND
15 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
16 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
17 * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
18 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
19 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
20 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
21 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
22 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
23 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
24 * SUCH DAMAGE.
25 */
26
27 #include <sys/cdefs.h>
28 __FBSDID("$FreeBSD$");
29
30 #include <sys/param.h>
31 #include <sys/bus.h>
32 #include <sys/kernel.h>
33 #include <sys/module.h>
34 #include <sys/sysctl.h>
35 #include <sys/systm.h>
36 #include <sys/smp.h>
37
38 #include <contrib/dev/acpica/include/acpi.h>
39
40 #include <dev/acpica/acpivar.h>
41
42 #include <x86/init.h>
43 #include <machine/nexusvar.h>
44 #include <machine/intr_machdep.h>
45
46 #include <xen/xen-os.h>
47 #include <xen/xen_intr.h>
48 #include <xen/xen_msi.h>
49
50 #include "pcib_if.h"
51
52 /*
53 * Xen nexus(4) driver.
54 */
55 static int
nexus_xen_probe(device_t dev)56 nexus_xen_probe(device_t dev)
57 {
58
59 if (!xen_pv_domain())
60 return (ENXIO);
61
62 return (BUS_PROBE_SPECIFIC);
63 }
64
65 static int
nexus_xen_attach(device_t dev)66 nexus_xen_attach(device_t dev)
67 {
68 int error;
69 device_t acpi_dev = NULL;
70
71 nexus_init_resources();
72 bus_generic_probe(dev);
73
74 if (xen_initial_domain()) {
75 /* Disable some ACPI devices that are not usable by Dom0 */
76 acpi_cpu_disabled = true;
77 acpi_hpet_disabled = true;
78 acpi_timer_disabled = true;
79
80 acpi_dev = BUS_ADD_CHILD(dev, 10, "acpi", 0);
81 if (acpi_dev == NULL)
82 panic("Unable to add ACPI bus to Xen Dom0");
83 }
84
85 error = bus_generic_attach(dev);
86 if (xen_initial_domain() && (error == 0))
87 acpi_install_wakeup_handler(device_get_softc(acpi_dev));
88
89 return (error);
90 }
91
92 static int
nexus_xen_config_intr(device_t dev,int irq,enum intr_trigger trig,enum intr_polarity pol)93 nexus_xen_config_intr(device_t dev, int irq, enum intr_trigger trig,
94 enum intr_polarity pol)
95 {
96 int ret;
97
98 /*
99 * ISA and PCI intline IRQs are not preregistered on Xen, so
100 * intercept calls to configure those and register them on the fly.
101 */
102 if ((irq < first_msi_irq) && (intr_lookup_source(irq) == NULL)) {
103 ret = xen_register_pirq(irq, trig, pol);
104 if (ret != 0)
105 return (ret);
106 nexus_add_irq(irq);
107 }
108 return (intr_config_intr(irq, trig, pol));
109 }
110
111 static int
nexus_xen_alloc_msix(device_t pcib,device_t dev,int * irq)112 nexus_xen_alloc_msix(device_t pcib, device_t dev, int *irq)
113 {
114
115 return (xen_msix_alloc(dev, irq));
116 }
117
118 static int
nexus_xen_release_msix(device_t pcib,device_t dev,int irq)119 nexus_xen_release_msix(device_t pcib, device_t dev, int irq)
120 {
121
122 return (xen_msix_release(irq));
123 }
124
125 static int
nexus_xen_alloc_msi(device_t pcib,device_t dev,int count,int maxcount,int * irqs)126 nexus_xen_alloc_msi(device_t pcib, device_t dev, int count, int maxcount, int *irqs)
127 {
128
129 return (xen_msi_alloc(dev, count, maxcount, irqs));
130 }
131
132 static int
nexus_xen_release_msi(device_t pcib,device_t dev,int count,int * irqs)133 nexus_xen_release_msi(device_t pcib, device_t dev, int count, int *irqs)
134 {
135
136 return (xen_msi_release(irqs, count));
137 }
138
139 static int
nexus_xen_map_msi(device_t pcib,device_t dev,int irq,uint64_t * addr,uint32_t * data)140 nexus_xen_map_msi(device_t pcib, device_t dev, int irq, uint64_t *addr, uint32_t *data)
141 {
142
143 return (xen_msi_map(irq, addr, data));
144 }
145
146 static device_method_t nexus_xen_methods[] = {
147 /* Device interface */
148 DEVMETHOD(device_probe, nexus_xen_probe),
149 DEVMETHOD(device_attach, nexus_xen_attach),
150
151 /* INTR */
152 DEVMETHOD(bus_config_intr, nexus_xen_config_intr),
153
154 /* MSI */
155 DEVMETHOD(pcib_alloc_msi, nexus_xen_alloc_msi),
156 DEVMETHOD(pcib_release_msi, nexus_xen_release_msi),
157 DEVMETHOD(pcib_alloc_msix, nexus_xen_alloc_msix),
158 DEVMETHOD(pcib_release_msix, nexus_xen_release_msix),
159 DEVMETHOD(pcib_map_msi, nexus_xen_map_msi),
160 { 0, 0 }
161 };
162
163 DEFINE_CLASS_1(nexus, nexus_xen_driver, nexus_xen_methods, 1, nexus_driver);
164 static devclass_t nexus_devclass;
165
166 DRIVER_MODULE(nexus_xen, root, nexus_xen_driver, nexus_devclass, 0, 0);
167