1/* 2 * Copyright (c) 2013 Roger Pau Monn�� <roger.pau@citrix.com> 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 */ 55static int 56nexus_xen_probe(device_t dev) 57{ 58 59 if (!xen_pv_domain()) 60 return (ENXIO); 61 62 return (BUS_PROBE_SPECIFIC); 63} 64 65static int 66nexus_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 92static int 93nexus_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 111static int 112nexus_xen_alloc_msix(device_t pcib, device_t dev, int *irq) 113{ 114 115 return (xen_msix_alloc(dev, irq)); 116} 117 118static int 119nexus_xen_release_msix(device_t pcib, device_t dev, int irq) 120{ 121 122 return (xen_msix_release(irq)); 123} 124 125static int 126nexus_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 132static int 133nexus_xen_release_msi(device_t pcib, device_t dev, int count, int *irqs) 134{ 135 136 return (xen_msi_release(irqs, count)); 137} 138 139static int 140nexus_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 146static 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), 160 161 { 0, 0 } 162}; 163 164DEFINE_CLASS_1(nexus, nexus_xen_driver, nexus_xen_methods, 1, nexus_driver); 165static devclass_t nexus_devclass; 166 167DRIVER_MODULE(nexus_xen, root, nexus_xen_driver, nexus_devclass, 0, 0); 168