dbcb35ffb9
some systems were designed so that AML writes to various resources shared with OS drivers, including the RTC, PIC, PCI, etc. These writes could collide with writes by the OS and should never be performed. For now, we print a message if such an access occurs, but do not block it. To block the access, the tunable "debug.acpi.block_bad_io" can be set to 1. In the future, we will flip the switch and this will become the default. Information about this problem was found in Microsoft KB 283649. They block IO accesses if the BIOS indicates via _OSI that it is Windows 2001 or higher. They always block accesses to the PIC, cascaded PIC, and ELCRs, no matter how old the BIOS.
332 lines
9.6 KiB
C
332 lines
9.6 KiB
C
/*-
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* Copyright (c) 2000, 2001 Michael Smith
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* Copyright (c) 2000 BSDi
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* All rights reserved.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution.
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*
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* THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
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* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
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* ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
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* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
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* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
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* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
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* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
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* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
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* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
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* SUCH DAMAGE.
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*/
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/*
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* 6.7 : Hardware Abstraction
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*/
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#include <sys/cdefs.h>
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__FBSDID("$FreeBSD$");
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#include <contrib/dev/acpica/acpi.h>
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#include <sys/kernel.h>
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#include <machine/bus.h>
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#include <machine/pci_cfgreg.h>
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#include <dev/pci/pcireg.h>
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/*
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* ACPICA's rather gung-ho approach to hardware resource ownership is a little
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* troublesome insofar as there is no easy way for us to know in advance
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* exactly which I/O resources it's going to want to use.
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*
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* In order to deal with this, we ignore resource ownership entirely, and simply
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* use the native I/O space accessor functionality. This is Evil, but it works.
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*
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* XXX use an intermediate #define for the tag/handle
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*/
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#ifdef __i386__
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#define ACPI_BUS_SPACE_IO I386_BUS_SPACE_IO
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#define ACPI_BUS_HANDLE 0
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#endif
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#ifdef __ia64__
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#define ACPI_BUS_SPACE_IO IA64_BUS_SPACE_IO
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#define ACPI_BUS_HANDLE 0
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#endif
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#ifdef __amd64__
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#define ACPI_BUS_SPACE_IO AMD64_BUS_SPACE_IO
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#define ACPI_BUS_HANDLE 0
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#endif
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/*
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* Some BIOS vendors use AML to read/write directly to IO space. This
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* can cause a problem if such accesses interfere with the OS's access to
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* the same ports. Windows XP and newer systems block accesses to certain
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* IO ports. We print a message or block accesses based on a tunable.
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*/
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static int illegal_bios_ports[] = {
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0x000, 0x00f, /* DMA controller 1 */
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0x020, 0x021, /* PIC */
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0x040, 0x043, /* Timer 1 */
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0x048, 0x04b, /* Timer 2 failsafe */
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0x070, 0x071, /* CMOS and RTC */
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0x074, 0x076, /* Extended CMOS */
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0x081, 0x083, /* DMA1 page registers */
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0x087, 0x087, /* DMA1 ch0 low page */
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0x089, 0x08b, /* DMA2 ch2 (0x89), ch3 low page (0x8a, 0x8b) */
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0x08f, 0x091, /* DMA2 low page refresh (0x8f) */
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/* Arb ctrl port, card select feedback (0x90, 0x91) */
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0x093, 0x094, /* System board setup */
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0x096, 0x097, /* POS channel select */
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0x0a0, 0x0a1, /* PIC (cascaded) */
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0x0c0, 0x0df, /* ISA DMA */
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0x4d0, 0x4d1, /* PIC ELCR (edge/level control) */
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0xcf8, 0xcff, /* PCI config space. Microsoft adds 0xd00 also but
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that seems incorrect. */
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-1, -1
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};
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/* Block accesses to bad IO port addresses or just print a warning. */
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static int block_bad_io;
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TUNABLE_INT("debug.acpi.block_bad_io", &block_bad_io);
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/*
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* Look up bad ports in our table. Returns 0 if ok, 1 if marked bad but
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* access is still allowed, or -1 to deny access.
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*/
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static int
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acpi_os_check_port(UINT32 addr, UINT32 width)
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{
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int error, *port;
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error = 0;
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for (port = illegal_bios_ports; *port != -1; port += 2) {
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if ((addr >= port[0] && addr <= port[1]) ||
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(addr < port[0] && addr + (width / 8) >= port[0])) {
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if (block_bad_io)
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error = -1;
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else
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error = 1;
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break;
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}
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}
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return (error);
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}
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ACPI_STATUS
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AcpiOsReadPort(ACPI_IO_ADDRESS InPort, UINT32 *Value, UINT32 Width)
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{
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int error;
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error = acpi_os_check_port(InPort, Width);
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if (error != 0) {
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printf("acpi: bad read from port 0x%03x (%d)\n", InPort, Width);
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if (error == -1)
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return (AE_BAD_PARAMETER);
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}
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switch (Width) {
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case 8:
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*(u_int8_t *)Value = bus_space_read_1(ACPI_BUS_SPACE_IO,
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ACPI_BUS_HANDLE, InPort);
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break;
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case 16:
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*(u_int16_t *)Value = bus_space_read_2(ACPI_BUS_SPACE_IO,
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ACPI_BUS_HANDLE, InPort);
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break;
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case 32:
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*(u_int32_t *)Value = bus_space_read_4(ACPI_BUS_SPACE_IO,
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ACPI_BUS_HANDLE, InPort);
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break;
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default:
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/* debug trap goes here */
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break;
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}
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return (AE_OK);
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}
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ACPI_STATUS
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AcpiOsWritePort(ACPI_IO_ADDRESS OutPort, UINT32 Value, UINT32 Width)
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{
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int error;
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error = acpi_os_check_port(OutPort, Width);
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if (error != 0) {
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printf("acpi: bad write to port 0x%03x (%d), val %#x\n", OutPort,
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Width, Value);
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if (error == -1)
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return (AE_BAD_PARAMETER);
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}
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switch (Width) {
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case 8:
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bus_space_write_1(ACPI_BUS_SPACE_IO, ACPI_BUS_HANDLE, OutPort, Value);
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break;
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case 16:
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bus_space_write_2(ACPI_BUS_SPACE_IO, ACPI_BUS_HANDLE, OutPort, Value);
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break;
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case 32:
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bus_space_write_4(ACPI_BUS_SPACE_IO, ACPI_BUS_HANDLE, OutPort, Value);
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break;
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default:
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/* debug trap goes here */
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break;
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}
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return (AE_OK);
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}
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ACPI_STATUS
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AcpiOsReadPciConfiguration(ACPI_PCI_ID *PciId, UINT32 Register, void *Value,
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UINT32 Width)
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{
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u_int32_t byte_width = Width / 8;
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u_int32_t val;
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if (!pci_cfgregopen())
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return (AE_NOT_EXIST);
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val = pci_cfgregread(PciId->Bus, PciId->Device, PciId->Function, Register,
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byte_width);
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switch (Width) {
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case 8:
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*(u_int8_t *)Value = val & 0xff;
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break;
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case 16:
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*(u_int16_t *)Value = val & 0xffff;
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break;
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case 32:
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*(u_int32_t *)Value = val;
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break;
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default:
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/* debug trap goes here */
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break;
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}
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return (AE_OK);
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}
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ACPI_STATUS
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AcpiOsWritePciConfiguration (ACPI_PCI_ID *PciId, UINT32 Register,
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ACPI_INTEGER Value, UINT32 Width)
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{
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u_int32_t byte_width = Width / 8;
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if (!pci_cfgregopen())
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return (AE_NOT_EXIST);
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pci_cfgregwrite(PciId->Bus, PciId->Device, PciId->Function, Register,
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Value, byte_width);
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return (AE_OK);
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}
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/* XXX should use acpivar.h but too many include dependencies */
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extern ACPI_STATUS acpi_GetInteger(ACPI_HANDLE handle, char *path, int
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*number);
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/*
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* Depth-first recursive case for finding the bus, given the slot/function.
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*/
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static int
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acpi_bus_number(ACPI_HANDLE root, ACPI_HANDLE curr, ACPI_PCI_ID *PciId)
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{
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ACPI_HANDLE parent;
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ACPI_STATUS status;
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ACPI_OBJECT_TYPE type;
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UINT32 adr;
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int bus, slot, func, class, subclass, header;
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/* Try to get the _BBN object of the root, otherwise assume it is 0. */
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bus = 0;
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if (root == curr) {
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status = acpi_GetInteger(root, "_BBN", &bus);
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if (ACPI_FAILURE(status) && bootverbose)
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printf("acpi_bus_number: root bus has no _BBN, assuming 0\n");
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return (bus);
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}
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status = AcpiGetParent(curr, &parent);
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if (ACPI_FAILURE(status))
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return (bus);
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/* First, recurse up the tree until we find the host bus. */
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bus = acpi_bus_number(root, parent, PciId);
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/* Validate parent bus device type. */
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if (ACPI_FAILURE(AcpiGetType(parent, &type)) || type != ACPI_TYPE_DEVICE) {
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printf("acpi_bus_number: not a device, type %d\n", type);
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return (bus);
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}
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/* Get the parent's slot and function. */
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status = acpi_GetInteger(parent, "_ADR", &adr);
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if (ACPI_FAILURE(status)) {
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printf("acpi_bus_number: can't get _ADR\n");
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return (bus);
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}
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slot = ACPI_HIWORD(adr);
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func = ACPI_LOWORD(adr);
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/* Is this a PCI-PCI or Cardbus-PCI bridge? */
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class = pci_cfgregread(bus, slot, func, PCIR_CLASS, 1);
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if (class != PCIC_BRIDGE)
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return (bus);
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subclass = pci_cfgregread(bus, slot, func, PCIR_SUBCLASS, 1);
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/* Find the header type, masking off the multifunction bit. */
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header = pci_cfgregread(bus, slot, func, PCIR_HDRTYPE, 1) & PCIM_HDRTYPE;
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if (header == PCIM_HDRTYPE_BRIDGE && subclass == PCIS_BRIDGE_PCI)
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bus = pci_cfgregread(bus, slot, func, PCIR_SECBUS_1, 1);
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if (header == PCIM_HDRTYPE_CARDBUS && subclass == PCIS_BRIDGE_CARDBUS)
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bus = pci_cfgregread(bus, slot, func, PCIR_SECBUS_2, 1);
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return (bus);
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}
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/*
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* Find the bus number for a device
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*
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* rhandle: handle for the root bus
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* chandle: handle for the device
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* PciId: pointer to device slot and function, we fill out bus
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*/
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void
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AcpiOsDerivePciId(ACPI_HANDLE rhandle, ACPI_HANDLE chandle, ACPI_PCI_ID **PciId)
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{
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ACPI_HANDLE parent;
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ACPI_STATUS status;
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int bus;
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if (pci_cfgregopen() == 0)
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panic("AcpiOsDerivePciId unable to initialize pci bus");
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/* Try to read _BBN for bus number if we're at the root */
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bus = 0;
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if (rhandle == chandle) {
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status = acpi_GetInteger(rhandle, "_BBN", &bus);
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if (ACPI_FAILURE(status) && bootverbose)
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printf("AcpiOsDerivePciId: root bus has no _BBN, assuming 0\n");
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}
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/*
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* Get the parent handle and call the recursive case. It is not
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* clear why we seem to be getting a chandle that points to a child
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* of the desired slot/function but passing in the parent handle
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* here works.
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*/
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if (ACPI_SUCCESS(AcpiGetParent(chandle, &parent)))
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bus = acpi_bus_number(rhandle, parent, *PciId);
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(*PciId)->Bus = bus;
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if (bootverbose) {
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printf("AcpiOsDerivePciId: bus %d dev %d func %d\n",
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(*PciId)->Bus, (*PciId)->Device, (*PciId)->Function);
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}
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}
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