1 /* $NetBSD: acpi_fdt.c,v 1.23 2021/08/07 16:18:43 thorpej Exp $ */ 2 3 /*- 4 * Copyright (c) 2015-2017 Jared McNeill <jmcneill@invisible.ca> 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 ``AS IS'' AND ANY EXPRESS OR 17 * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES 18 * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. 19 * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, 20 * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, 21 * BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; 22 * LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED 23 * AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, 24 * 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 "pci.h" 30 #include "opt_efi.h" 31 32 #include <sys/cdefs.h> 33 __KERNEL_RCSID(0, "$NetBSD: acpi_fdt.c,v 1.23 2021/08/07 16:18:43 thorpej Exp $"); 34 35 #include <sys/param.h> 36 #include <sys/bus.h> 37 #include <sys/device.h> 38 #include <sys/intr.h> 39 #include <sys/systm.h> 40 #include <sys/kernel.h> 41 #include <sys/lwp.h> 42 #include <sys/kmem.h> 43 #include <sys/queue.h> 44 #include <sys/sysctl.h> 45 46 #include <dev/fdt/fdtvar.h> 47 48 #include <dev/acpi/acpivar.h> 49 #include <dev/pci/pcivar.h> 50 #include <dev/smbiosvar.h> 51 52 #include <arm/arm/psci.h> 53 54 #include <arm/acpi/acpi_pci_machdep.h> 55 56 #ifdef EFI_RUNTIME 57 #include <arm/arm/efi_runtime.h> 58 #endif 59 60 static int acpi_fdt_match(device_t, cfdata_t, void *); 61 static void acpi_fdt_attach(device_t, device_t, void *); 62 63 static void acpi_fdt_poweroff(device_t); 64 65 static void acpi_fdt_smbios_init(device_t); 66 static void acpi_fdt_sysctl_init(void); 67 68 extern struct arm32_bus_dma_tag acpi_coherent_dma_tag; 69 70 static uint64_t smbios_table = 0; 71 72 static const struct device_compatible_entry compat_data[] = { 73 { .compat = "netbsd,acpi" }, 74 DEVICE_COMPAT_EOL 75 }; 76 77 static const struct fdtbus_power_controller_func acpi_fdt_power_funcs = { 78 .poweroff = acpi_fdt_poweroff, 79 }; 80 81 CFATTACH_DECL_NEW(acpi_fdt, 0, acpi_fdt_match, acpi_fdt_attach, NULL, NULL); 82 83 static int 84 acpi_fdt_match(device_t parent, cfdata_t cf, void *aux) 85 { 86 struct fdt_attach_args * const faa = aux; 87 88 return of_compatible_match(faa->faa_phandle, compat_data); 89 } 90 91 static void 92 acpi_fdt_attach(device_t parent, device_t self, void *aux) 93 { 94 extern void platform_init(void); /* XXX */ 95 struct fdt_attach_args * const faa = aux; 96 struct acpibus_attach_args aa; 97 98 aprint_naive("\n"); 99 aprint_normal("\n"); 100 101 acpi_fdt_smbios_init(self); 102 platform_init(); 103 104 fdtbus_register_power_controller(self, faa->faa_phandle, 105 &acpi_fdt_power_funcs); 106 107 if (!acpi_probe()) 108 panic("ACPI subsystem failed to initialize"); 109 110 platform_init(); 111 112 memset(&aa, 0, sizeof(aa)); 113 #if NPCI > 0 114 aa.aa_pciflags = 115 /*PCI_FLAGS_IO_OKAY |*/ PCI_FLAGS_MEM_OKAY | 116 PCI_FLAGS_MRL_OKAY | PCI_FLAGS_MRM_OKAY | 117 PCI_FLAGS_MWI_OKAY; 118 #ifdef __HAVE_PCI_MSI_MSIX 119 aa.aa_pciflags |= PCI_FLAGS_MSI_OKAY | PCI_FLAGS_MSIX_OKAY; 120 #endif 121 #endif 122 123 aa.aa_memt = faa->faa_bst; 124 aa.aa_dmat = NULL; 125 aa.aa_dmat64 = NULL; 126 config_found(self, &aa, NULL, CFARGS_NONE); 127 128 acpi_fdt_sysctl_init(); 129 } 130 131 static void 132 acpi_fdt_poweroff(device_t dev) 133 { 134 delay(500000); 135 #ifdef EFI_RUNTIME 136 if (arm_efirt_reset(EFI_RESET_SHUTDOWN) == 0) 137 return; 138 #endif 139 if (psci_available()) 140 psci_system_off(); 141 } 142 143 static int 144 acpi_fdt_smbios_version(void) 145 { 146 uint8_t *hdr; 147 int smbver; 148 149 if (smbios_table == 0) { 150 return 0; 151 } 152 153 hdr = AcpiOsMapMemory(smbios_table, 24); 154 if (hdr == NULL) { 155 return 0; 156 } 157 if (smbios3_check_header(hdr)) { 158 smbver = 3; 159 } else if (smbios2_check_header(hdr)) { 160 smbver = 2; 161 } else { 162 smbver = 0; 163 } 164 AcpiOsUnmapMemory(hdr, 24); 165 return smbver; 166 } 167 168 static void 169 acpi_fdt_smbios_init(device_t dev) 170 { 171 uint8_t *ptr; 172 int smbver; 173 174 const int chosen = OF_finddevice("/chosen"); 175 if (chosen >= 0) { 176 of_getprop_uint64(chosen, "netbsd,smbios-table", &smbios_table); 177 } 178 if (smbios_table == 0) { 179 return; 180 } 181 182 smbios_entry.hdrphys = smbios_table; 183 184 smbver = acpi_fdt_smbios_version(); 185 if (smbver == 3) { 186 struct smb3hdr *sh = AcpiOsMapMemory(smbios_table, sizeof(*sh)); 187 if (sh == NULL) { 188 return; 189 } 190 191 ptr = AcpiOsMapMemory(sh->addr, sh->size); 192 if (ptr != NULL) { 193 smbios_entry.tabphys = sh->addr; 194 smbios_entry.addr = ptr; 195 smbios_entry.len = sh->size; 196 smbios_entry.rev = sh->eprev; 197 smbios_entry.mjr = sh->majrev; 198 smbios_entry.min = sh->minrev; 199 smbios_entry.doc = sh->docrev; 200 smbios_entry.count = UINT16_MAX; 201 } 202 203 aprint_normal_dev(dev, "SMBIOS rev. %d.%d.%d @ 0x%lx\n", 204 sh->majrev, sh->minrev, sh->docrev, (u_long)sh->addr); 205 AcpiOsUnmapMemory(sh, sizeof(*sh)); 206 } else if (smbver == 2) { 207 struct smbhdr *sh = AcpiOsMapMemory(smbios_table, sizeof(*sh)); 208 if (sh == NULL) { 209 return; 210 } 211 212 ptr = AcpiOsMapMemory(sh->addr, sh->size); 213 if (ptr != NULL) { 214 smbios_entry.tabphys = sh->addr; 215 smbios_entry.addr = ptr; 216 smbios_entry.len = sh->size; 217 smbios_entry.rev = 0; 218 smbios_entry.mjr = sh->majrev; 219 smbios_entry.min = sh->minrev; 220 smbios_entry.doc = 0; 221 smbios_entry.count = sh->count; 222 } 223 224 aprint_normal_dev(dev, "SMBIOS rev. %d.%d @ 0x%lx (%d entries)\n", 225 sh->majrev, sh->minrev, (u_long)sh->addr, sh->count); 226 AcpiOsUnmapMemory(sh, sizeof(*sh)); 227 } 228 } 229 230 static void 231 acpi_fdt_sysctl_init(void) 232 { 233 const struct sysctlnode *rnode; 234 int error; 235 236 if (smbios_table == 0) { 237 return; 238 } 239 240 error = sysctl_createv(NULL, 0, NULL, &rnode, 241 CTLFLAG_PERMANENT, CTLTYPE_NODE, "machdep", NULL, 242 NULL, 0, NULL, 0, CTL_MACHDEP, CTL_EOL); 243 if (error) { 244 return; 245 } 246 247 (void)sysctl_createv(NULL, 0, &rnode, NULL, 248 CTLFLAG_PERMANENT | CTLFLAG_READONLY | CTLFLAG_HEX, CTLTYPE_QUAD, 249 "smbios", SYSCTL_DESCR("SMBIOS table pointer"), 250 NULL, 0, &smbios_table, sizeof(smbios_table), 251 CTL_CREATE, CTL_EOL); 252 } 253