1 /*- 2 * SPDX-License-Identifier: BSD-2-Clause 3 * 4 * Copyright (c) 2022 Scott Long 5 * All rights reserved. 6 * 7 * Redistribution and use in source and binary forms, with or without 8 * modification, are permitted provided that the following conditions 9 * are met: 10 * 1. Redistributions of source code must retain the above copyright 11 * notice, this list of conditions and the following disclaimer. 12 * 2. Redistributions in binary form must reproduce the above copyright 13 * notice, this list of conditions and the following disclaimer in the 14 * documentation and/or other materials provided with the distribution. 15 * 16 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND 17 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 18 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 19 * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE 20 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 21 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 22 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 23 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 24 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 25 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 26 * SUCH DAMAGE. 27 */ 28 29 #include "opt_acpi.h" 30 #include "opt_thunderbolt.h" 31 32 /* ACPI identified PCIe bridge for Thunderbolt */ 33 #include <sys/types.h> 34 #include <sys/param.h> 35 #include <sys/systm.h> 36 #include <sys/kernel.h> 37 #include <sys/module.h> 38 #include <sys/bus.h> 39 #include <sys/conf.h> 40 #include <sys/malloc.h> 41 #include <sys/sysctl.h> 42 #include <sys/lock.h> 43 #include <sys/param.h> 44 #include <sys/endian.h> 45 46 #include <machine/bus.h> 47 #include <machine/resource.h> 48 #include <machine/stdarg.h> 49 #include <sys/rman.h> 50 51 #include <machine/pci_cfgreg.h> 52 #include <dev/pci/pcireg.h> 53 #include <dev/pci/pcivar.h> 54 #include <dev/pci/pcib_private.h> 55 #include <dev/pci/pci_private.h> 56 57 #include <contrib/dev/acpica/include/acpi.h> 58 #include <contrib/dev/acpica/include/accommon.h> 59 #include <dev/acpica/acpivar.h> 60 #include <dev/acpica/acpi_pcibvar.h> 61 #include <machine/md_var.h> 62 63 #include <dev/thunderbolt/tb_reg.h> 64 #include <dev/thunderbolt/tb_pcib.h> 65 #include <dev/thunderbolt/nhi_var.h> 66 #include <dev/thunderbolt/nhi_reg.h> 67 #include <dev/thunderbolt/tbcfg_reg.h> 68 #include <dev/thunderbolt/tb_debug.h> 69 70 static int tb_acpi_pcib_probe(device_t); 71 static int tb_acpi_pcib_attach(device_t); 72 static int tb_acpi_pcib_detach(device_t); 73 74 /* ACPI attachment for Thudnerbolt Bridges */ 75 76 static int 77 tb_acpi_pcib_probe(device_t dev) 78 { 79 char desc[TB_DESC_MAX], desc1[TB_DESC_MAX]; 80 int val; 81 82 if (pci_get_class(dev) != PCIC_BRIDGE || 83 pci_get_subclass(dev) != PCIS_BRIDGE_PCI || 84 acpi_disabled("pci")) 85 return (ENXIO); 86 if (acpi_get_handle(dev) == NULL) 87 return (ENXIO); 88 if (pci_cfgregopen() == 0) 89 return (ENXIO); 90 91 /* 92 * Success? Specify a higher probe priority than the conventional 93 * Thunderbolt PCIb driver 94 */ 95 if ((val = tb_pcib_probe_common(dev, desc)) < 0) { 96 val++; 97 snprintf(desc1, TB_DESC_MAX, "ACPI %s", desc); 98 device_set_desc_copy(dev, desc1); 99 } 100 101 return (val); 102 } 103 104 static int 105 tb_acpi_pcib_attach(device_t dev) 106 { 107 struct tb_pcib_softc *sc; 108 int error; 109 110 error = tb_pcib_attach_common(dev); 111 if (error) 112 return (error); 113 114 sc = device_get_softc(dev); 115 sc->ap_handle = acpi_get_handle(dev); 116 KASSERT(sc->ap_handle != NULL, ("ACPI handle cannot be NULL\n")); 117 118 /* Execute OSUP in case the BIOS didn't */ 119 if (TB_IS_ROOT(sc)) { 120 ACPI_OBJECT_LIST list; 121 ACPI_OBJECT arg; 122 ACPI_BUFFER buf; 123 ACPI_STATUS s; 124 125 tb_debug(sc, DBG_BRIDGE, "Executing OSUP\n"); 126 127 list.Pointer = &arg; 128 list.Count = 1; 129 arg.Integer.Value = 0; 130 arg.Type = ACPI_TYPE_INTEGER; 131 buf.Length = ACPI_ALLOCATE_BUFFER; 132 buf.Pointer = NULL; 133 134 s = AcpiEvaluateObject(sc->ap_handle, "\\_GPE.OSUP", &list, 135 &buf); 136 tb_debug(sc, DBG_BRIDGE|DBG_FULL, 137 "ACPI returned %d, buf= %p\n", s, buf.Pointer); 138 if (buf.Pointer != NULL) 139 tb_debug(sc, DBG_BRIDGE|DBG_FULL, "buffer= 0x%x\n", 140 *(uint32_t *)buf.Pointer); 141 142 AcpiOsFree(buf.Pointer); 143 } 144 145 pcib_attach_common(dev); 146 acpi_pcib_fetch_prt(dev, &sc->ap_prt); 147 148 return (pcib_attach_child(dev)); 149 } 150 151 static int 152 tb_acpi_pcib_detach(device_t dev) 153 { 154 struct tb_pcib_softc *sc; 155 int error; 156 157 sc = device_get_softc(dev); 158 tb_debug(sc, DBG_BRIDGE|DBG_ROUTER|DBG_EXTRA, "tb_acpi_pcib_detach\n"); 159 160 error = pcib_detach(dev); 161 if (error == 0) 162 AcpiOsFree(sc->ap_prt.Pointer); 163 return (error); 164 } 165 166 static device_method_t tb_acpi_pcib_methods[] = { 167 /* Device interface */ 168 DEVMETHOD(device_probe, tb_acpi_pcib_probe), 169 DEVMETHOD(device_attach, tb_acpi_pcib_attach), 170 DEVMETHOD(device_detach, tb_acpi_pcib_detach), 171 172 /* Thunderbolt interface is inherited */ 173 174 DEVMETHOD_END 175 }; 176 177 DEFINE_CLASS_2(tbolt, tb_acpi_pcib_driver, tb_acpi_pcib_methods, 178 sizeof(struct tb_pcib_softc), pcib_driver, tb_pcib_driver); 179 DRIVER_MODULE_ORDERED(tb_acpi_pcib, pci, tb_acpi_pcib_driver, 180 NULL, NULL, SI_ORDER_MIDDLE); 181 MODULE_DEPEND(tb_acpi_pcib, acpi, 1, 1, 1); 182