1 /*- 2 * Copyright (c) 2000, 2001 Michael Smith 3 * Copyright (c) 2000 BSDi 4 * All rights reserved. 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 /* 29 * 6.7 : Hardware Abstraction 30 */ 31 32 #include <sys/cdefs.h> 33 __FBSDID("$FreeBSD$"); 34 35 #include <contrib/dev/acpica/acpi.h> 36 37 #include <sys/kernel.h> 38 #include <machine/bus.h> 39 #include <machine/pci_cfgreg.h> 40 #include <dev/pci/pcireg.h> 41 42 /* 43 * ACPICA's rather gung-ho approach to hardware resource ownership is a little 44 * troublesome insofar as there is no easy way for us to know in advance 45 * exactly which I/O resources it's going to want to use. 46 * 47 * In order to deal with this, we ignore resource ownership entirely, and simply 48 * use the native I/O space accessor functionality. This is Evil, but it works. 49 * 50 * XXX use an intermediate #define for the tag/handle 51 */ 52 53 #ifdef __i386__ 54 #define ACPI_BUS_SPACE_IO I386_BUS_SPACE_IO 55 #define ACPI_BUS_HANDLE 0 56 #endif 57 #ifdef __ia64__ 58 #define ACPI_BUS_SPACE_IO IA64_BUS_SPACE_IO 59 #define ACPI_BUS_HANDLE 0 60 #endif 61 #ifdef __amd64__ 62 #define ACPI_BUS_SPACE_IO AMD64_BUS_SPACE_IO 63 #define ACPI_BUS_HANDLE 0 64 #endif 65 66 /* 67 * Some BIOS vendors use AML to read/write directly to IO space. This 68 * can cause a problem if such accesses interfere with the OS's access to 69 * the same ports. Windows XP and newer systems block accesses to certain 70 * IO ports. We print a message or block accesses based on a tunable. 71 */ 72 static int illegal_bios_ports[] = { 73 0x000, 0x00f, /* DMA controller 1 */ 74 0x020, 0x021, /* PIC */ 75 0x040, 0x043, /* Timer 1 */ 76 0x048, 0x04b, /* Timer 2 failsafe */ 77 0x070, 0x071, /* CMOS and RTC */ 78 0x074, 0x076, /* Extended CMOS */ 79 0x081, 0x083, /* DMA1 page registers */ 80 0x087, 0x087, /* DMA1 ch0 low page */ 81 0x089, 0x08b, /* DMA2 ch2 (0x89), ch3 low page (0x8a, 0x8b) */ 82 0x08f, 0x091, /* DMA2 low page refresh (0x8f) */ 83 /* Arb ctrl port, card select feedback (0x90, 0x91) */ 84 0x093, 0x094, /* System board setup */ 85 0x096, 0x097, /* POS channel select */ 86 0x0a0, 0x0a1, /* PIC (cascaded) */ 87 0x0c0, 0x0df, /* ISA DMA */ 88 0x4d0, 0x4d1, /* PIC ELCR (edge/level control) */ 89 0xcf8, 0xcff, /* PCI config space. Microsoft adds 0xd00 also but 90 that seems incorrect. */ 91 -1, -1 92 }; 93 94 /* Block accesses to bad IO port addresses or just print a warning. */ 95 static int block_bad_io; 96 TUNABLE_INT("debug.acpi.block_bad_io", &block_bad_io); 97 98 /* 99 * Look up bad ports in our table. Returns 0 if ok, 1 if marked bad but 100 * access is still allowed, or -1 to deny access. 101 */ 102 static int 103 acpi_os_check_port(UINT32 addr, UINT32 width) 104 { 105 int error, *port; 106 107 error = 0; 108 for (port = illegal_bios_ports; *port != -1; port += 2) { 109 if ((addr >= port[0] && addr <= port[1]) || 110 (addr < port[0] && addr + (width / 8) > port[0])) { 111 if (block_bad_io) 112 error = -1; 113 else 114 error = 1; 115 break; 116 } 117 } 118 119 return (error); 120 } 121 122 ACPI_STATUS 123 AcpiOsReadPort(ACPI_IO_ADDRESS InPort, UINT32 *Value, UINT32 Width) 124 { 125 int error; 126 127 error = acpi_os_check_port(InPort, Width); 128 if (error != 0) { 129 printf("acpi: bad read from port 0x%03x (%d)\n", (int)InPort, Width); 130 if (error == -1) 131 return (AE_BAD_PARAMETER); 132 } 133 134 switch (Width) { 135 case 8: 136 *(u_int8_t *)Value = bus_space_read_1(ACPI_BUS_SPACE_IO, 137 ACPI_BUS_HANDLE, InPort); 138 break; 139 case 16: 140 *(u_int16_t *)Value = bus_space_read_2(ACPI_BUS_SPACE_IO, 141 ACPI_BUS_HANDLE, InPort); 142 break; 143 case 32: 144 *(u_int32_t *)Value = bus_space_read_4(ACPI_BUS_SPACE_IO, 145 ACPI_BUS_HANDLE, InPort); 146 break; 147 default: 148 /* debug trap goes here */ 149 break; 150 } 151 152 return (AE_OK); 153 } 154 155 ACPI_STATUS 156 AcpiOsWritePort(ACPI_IO_ADDRESS OutPort, UINT32 Value, UINT32 Width) 157 { 158 int error; 159 160 error = acpi_os_check_port(OutPort, Width); 161 if (error != 0) { 162 printf("acpi: bad write to port 0x%03x (%d), val %#x\n", (int)OutPort, 163 Width, Value); 164 if (error == -1) 165 return (AE_BAD_PARAMETER); 166 } 167 168 switch (Width) { 169 case 8: 170 bus_space_write_1(ACPI_BUS_SPACE_IO, ACPI_BUS_HANDLE, OutPort, Value); 171 break; 172 case 16: 173 bus_space_write_2(ACPI_BUS_SPACE_IO, ACPI_BUS_HANDLE, OutPort, Value); 174 break; 175 case 32: 176 bus_space_write_4(ACPI_BUS_SPACE_IO, ACPI_BUS_HANDLE, OutPort, Value); 177 break; 178 default: 179 /* debug trap goes here */ 180 break; 181 } 182 183 return (AE_OK); 184 } 185 186 ACPI_STATUS 187 AcpiOsReadPciConfiguration(ACPI_PCI_ID *PciId, UINT32 Register, void *Value, 188 UINT32 Width) 189 { 190 u_int32_t byte_width = Width / 8; 191 u_int32_t val; 192 193 if (!pci_cfgregopen()) 194 return (AE_NOT_EXIST); 195 196 val = pci_cfgregread(PciId->Bus, PciId->Device, PciId->Function, Register, 197 byte_width); 198 switch (Width) { 199 case 8: 200 *(u_int8_t *)Value = val & 0xff; 201 break; 202 case 16: 203 *(u_int16_t *)Value = val & 0xffff; 204 break; 205 case 32: 206 *(u_int32_t *)Value = val; 207 break; 208 default: 209 /* debug trap goes here */ 210 break; 211 } 212 213 return (AE_OK); 214 } 215 216 217 ACPI_STATUS 218 AcpiOsWritePciConfiguration (ACPI_PCI_ID *PciId, UINT32 Register, 219 ACPI_INTEGER Value, UINT32 Width) 220 { 221 u_int32_t byte_width = Width / 8; 222 223 if (!pci_cfgregopen()) 224 return (AE_NOT_EXIST); 225 226 pci_cfgregwrite(PciId->Bus, PciId->Device, PciId->Function, Register, 227 Value, byte_width); 228 229 return (AE_OK); 230 } 231 232 /* XXX should use acpivar.h but too many include dependencies */ 233 extern ACPI_STATUS acpi_GetInteger(ACPI_HANDLE handle, char *path, int 234 *number); 235 236 /* 237 * Depth-first recursive case for finding the bus, given the slot/function. 238 */ 239 static int 240 acpi_bus_number(ACPI_HANDLE root, ACPI_HANDLE curr, ACPI_PCI_ID *PciId) 241 { 242 ACPI_HANDLE parent; 243 ACPI_STATUS status; 244 ACPI_OBJECT_TYPE type; 245 UINT32 adr; 246 int bus, slot, func, class, subclass, header; 247 248 /* Try to get the _BBN object of the root, otherwise assume it is 0. */ 249 bus = 0; 250 if (root == curr) { 251 status = acpi_GetInteger(root, "_BBN", &bus); 252 if (ACPI_FAILURE(status) && bootverbose) 253 printf("acpi_bus_number: root bus has no _BBN, assuming 0\n"); 254 return (bus); 255 } 256 status = AcpiGetParent(curr, &parent); 257 if (ACPI_FAILURE(status)) 258 return (bus); 259 260 /* First, recurse up the tree until we find the host bus. */ 261 bus = acpi_bus_number(root, parent, PciId); 262 263 /* Validate parent bus device type. */ 264 if (ACPI_FAILURE(AcpiGetType(parent, &type)) || type != ACPI_TYPE_DEVICE) { 265 printf("acpi_bus_number: not a device, type %d\n", type); 266 return (bus); 267 } 268 269 /* Get the parent's slot and function. */ 270 status = acpi_GetInteger(parent, "_ADR", &adr); 271 if (ACPI_FAILURE(status)) { 272 printf("acpi_bus_number: can't get _ADR\n"); 273 return (bus); 274 } 275 slot = ACPI_HIWORD(adr); 276 func = ACPI_LOWORD(adr); 277 278 /* Is this a PCI-PCI or Cardbus-PCI bridge? */ 279 class = pci_cfgregread(bus, slot, func, PCIR_CLASS, 1); 280 if (class != PCIC_BRIDGE) 281 return (bus); 282 subclass = pci_cfgregread(bus, slot, func, PCIR_SUBCLASS, 1); 283 284 /* Find the header type, masking off the multifunction bit. */ 285 header = pci_cfgregread(bus, slot, func, PCIR_HDRTYPE, 1) & PCIM_HDRTYPE; 286 if (header == PCIM_HDRTYPE_BRIDGE && subclass == PCIS_BRIDGE_PCI) 287 bus = pci_cfgregread(bus, slot, func, PCIR_SECBUS_1, 1); 288 if (header == PCIM_HDRTYPE_CARDBUS && subclass == PCIS_BRIDGE_CARDBUS) 289 bus = pci_cfgregread(bus, slot, func, PCIR_SECBUS_2, 1); 290 return (bus); 291 } 292 293 /* 294 * Find the bus number for a device 295 * 296 * rhandle: handle for the root bus 297 * chandle: handle for the device 298 * PciId: pointer to device slot and function, we fill out bus 299 */ 300 void 301 AcpiOsDerivePciId(ACPI_HANDLE rhandle, ACPI_HANDLE chandle, ACPI_PCI_ID **PciId) 302 { 303 ACPI_HANDLE parent; 304 ACPI_STATUS status; 305 int bus; 306 307 if (pci_cfgregopen() == 0) 308 panic("AcpiOsDerivePciId unable to initialize pci bus"); 309 310 /* Try to read _BBN for bus number if we're at the root */ 311 bus = 0; 312 if (rhandle == chandle) { 313 status = acpi_GetInteger(rhandle, "_BBN", &bus); 314 if (ACPI_FAILURE(status) && bootverbose) 315 printf("AcpiOsDerivePciId: root bus has no _BBN, assuming 0\n"); 316 } 317 318 /* 319 * Get the parent handle and call the recursive case. It is not 320 * clear why we seem to be getting a chandle that points to a child 321 * of the desired slot/function but passing in the parent handle 322 * here works. 323 */ 324 if (ACPI_SUCCESS(AcpiGetParent(chandle, &parent))) 325 bus = acpi_bus_number(rhandle, parent, *PciId); 326 (*PciId)->Bus = bus; 327 if (bootverbose) { 328 printf("AcpiOsDerivePciId: bus %d dev %d func %d\n", 329 (*PciId)->Bus, (*PciId)->Device, (*PciId)->Function); 330 } 331 } 332