The Design and Implementation of the FreeBSD Operating System, Second Edition
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FreeBSD/Linux Kernel Cross Reference
sys/dev/acpica/acpi_pcib_acpi.c

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    1 /*-
    2  * Copyright (c) 2000 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 #include <sys/cdefs.h>
   29 __FBSDID("$FreeBSD: releng/9.0/sys/dev/acpica/acpi_pcib_acpi.c 227397 2011-11-09 18:12:42Z jhb $");
   30 
   31 #include "opt_acpi.h"
   32 #include <sys/param.h>
   33 #include <sys/bus.h>
   34 #include <sys/kernel.h>
   35 #include <sys/limits.h>
   36 #include <sys/malloc.h>
   37 #include <sys/module.h>
   38 #include <sys/rman.h>
   39 #include <sys/sysctl.h>
   40 
   41 #include <contrib/dev/acpica/include/acpi.h>
   42 #include <contrib/dev/acpica/include/accommon.h>
   43 
   44 #include <dev/acpica/acpivar.h>
   45 
   46 #include <machine/pci_cfgreg.h>
   47 #include <dev/pci/pcivar.h>
   48 #include <dev/pci/pcib_private.h>
   49 #include "pcib_if.h"
   50 
   51 #include <dev/acpica/acpi_pcibvar.h>
   52 
   53 /* Hooks for the ACPI CA debugging infrastructure. */
   54 #define _COMPONENT      ACPI_BUS
   55 ACPI_MODULE_NAME("PCI_ACPI")
   56 
   57 struct acpi_hpcib_softc {
   58     device_t            ap_dev;
   59     ACPI_HANDLE         ap_handle;
   60     int                 ap_flags;
   61 
   62     int                 ap_segment;     /* analagous to Alpha 'hose' */
   63     int                 ap_bus;         /* bios-assigned bus number */
   64 
   65     ACPI_BUFFER         ap_prt;         /* interrupt routing table */
   66 #ifdef NEW_PCIB
   67     struct pcib_host_resources ap_host_res;
   68 #endif
   69 };
   70 
   71 static int              acpi_pcib_acpi_probe(device_t bus);
   72 static int              acpi_pcib_acpi_attach(device_t bus);
   73 static int              acpi_pcib_read_ivar(device_t dev, device_t child,
   74                             int which, uintptr_t *result);
   75 static int              acpi_pcib_write_ivar(device_t dev, device_t child,
   76                             int which, uintptr_t value);
   77 static uint32_t         acpi_pcib_read_config(device_t dev, u_int bus,
   78                             u_int slot, u_int func, u_int reg, int bytes);
   79 static void             acpi_pcib_write_config(device_t dev, u_int bus,
   80                             u_int slot, u_int func, u_int reg, uint32_t data,
   81                             int bytes);
   82 static int              acpi_pcib_acpi_route_interrupt(device_t pcib,
   83                             device_t dev, int pin);
   84 static int              acpi_pcib_alloc_msi(device_t pcib, device_t dev,
   85                             int count, int maxcount, int *irqs);
   86 static int              acpi_pcib_map_msi(device_t pcib, device_t dev,
   87                             int irq, uint64_t *addr, uint32_t *data);
   88 static int              acpi_pcib_alloc_msix(device_t pcib, device_t dev,
   89                             int *irq);
   90 static struct resource *acpi_pcib_acpi_alloc_resource(device_t dev,
   91                             device_t child, int type, int *rid,
   92                             u_long start, u_long end, u_long count,
   93                             u_int flags);
   94 #ifdef NEW_PCIB
   95 static int              acpi_pcib_acpi_adjust_resource(device_t dev,
   96                             device_t child, int type, struct resource *r,
   97                             u_long start, u_long end);
   98 #endif
   99 
  100 static device_method_t acpi_pcib_acpi_methods[] = {
  101     /* Device interface */
  102     DEVMETHOD(device_probe,             acpi_pcib_acpi_probe),
  103     DEVMETHOD(device_attach,            acpi_pcib_acpi_attach),
  104     DEVMETHOD(device_shutdown,          bus_generic_shutdown),
  105     DEVMETHOD(device_suspend,           bus_generic_suspend),
  106     DEVMETHOD(device_resume,            bus_generic_resume),
  107 
  108     /* Bus interface */
  109     DEVMETHOD(bus_print_child,          bus_generic_print_child),
  110     DEVMETHOD(bus_read_ivar,            acpi_pcib_read_ivar),
  111     DEVMETHOD(bus_write_ivar,           acpi_pcib_write_ivar),
  112     DEVMETHOD(bus_alloc_resource,       acpi_pcib_acpi_alloc_resource),
  113 #ifdef NEW_PCIB
  114     DEVMETHOD(bus_adjust_resource,      acpi_pcib_acpi_adjust_resource),
  115 #else
  116     DEVMETHOD(bus_adjust_resource,      bus_generic_adjust_resource),
  117 #endif
  118     DEVMETHOD(bus_release_resource,     bus_generic_release_resource),
  119     DEVMETHOD(bus_activate_resource,    bus_generic_activate_resource),
  120     DEVMETHOD(bus_deactivate_resource,  bus_generic_deactivate_resource),
  121     DEVMETHOD(bus_setup_intr,           bus_generic_setup_intr),
  122     DEVMETHOD(bus_teardown_intr,        bus_generic_teardown_intr),
  123 
  124     /* pcib interface */
  125     DEVMETHOD(pcib_maxslots,            pcib_maxslots),
  126     DEVMETHOD(pcib_read_config,         acpi_pcib_read_config),
  127     DEVMETHOD(pcib_write_config,        acpi_pcib_write_config),
  128     DEVMETHOD(pcib_route_interrupt,     acpi_pcib_acpi_route_interrupt),
  129     DEVMETHOD(pcib_alloc_msi,           acpi_pcib_alloc_msi),
  130     DEVMETHOD(pcib_release_msi,         pcib_release_msi),
  131     DEVMETHOD(pcib_alloc_msix,          acpi_pcib_alloc_msix),
  132     DEVMETHOD(pcib_release_msix,        pcib_release_msix),
  133     DEVMETHOD(pcib_map_msi,             acpi_pcib_map_msi),
  134     DEVMETHOD(pcib_power_for_sleep,     acpi_pcib_power_for_sleep),
  135 
  136     {0, 0}
  137 };
  138 
  139 static devclass_t pcib_devclass;
  140 
  141 DEFINE_CLASS_0(pcib, acpi_pcib_acpi_driver, acpi_pcib_acpi_methods,
  142     sizeof(struct acpi_hpcib_softc));
  143 DRIVER_MODULE(acpi_pcib, acpi, acpi_pcib_acpi_driver, pcib_devclass, 0, 0);
  144 MODULE_DEPEND(acpi_pcib, acpi, 1, 1, 1);
  145 
  146 static int
  147 acpi_pcib_acpi_probe(device_t dev)
  148 {
  149     ACPI_DEVICE_INFO    *devinfo;
  150     ACPI_HANDLE         h;
  151     int                 root;
  152 
  153     if (acpi_disabled("pcib") || (h = acpi_get_handle(dev)) == NULL ||
  154         ACPI_FAILURE(AcpiGetObjectInfo(h, &devinfo)))
  155         return (ENXIO);
  156     root = (devinfo->Flags & ACPI_PCI_ROOT_BRIDGE) != 0;
  157     AcpiOsFree(devinfo);
  158     if (!root || pci_cfgregopen() == 0)
  159         return (ENXIO);
  160 
  161     device_set_desc(dev, "ACPI Host-PCI bridge");
  162     return (0);
  163 }
  164 
  165 #ifdef NEW_PCIB
  166 static ACPI_STATUS
  167 acpi_pcib_producer_handler(ACPI_RESOURCE *res, void *context)
  168 {
  169         struct acpi_hpcib_softc *sc;
  170         UINT64 length, min, max;
  171         u_int flags;
  172         int error, type;
  173 
  174         sc = context;
  175         switch (res->Type) {
  176         case ACPI_RESOURCE_TYPE_START_DEPENDENT:
  177         case ACPI_RESOURCE_TYPE_END_DEPENDENT:
  178                 panic("host bridge has depenedent resources");
  179         case ACPI_RESOURCE_TYPE_ADDRESS16:
  180         case ACPI_RESOURCE_TYPE_ADDRESS32:
  181         case ACPI_RESOURCE_TYPE_ADDRESS64:
  182         case ACPI_RESOURCE_TYPE_EXTENDED_ADDRESS64:
  183                 if (res->Data.Address.ProducerConsumer != ACPI_PRODUCER)
  184                         break;
  185                 switch (res->Type) {
  186                 case ACPI_RESOURCE_TYPE_ADDRESS16:
  187                         min = res->Data.Address16.Minimum;
  188                         max = res->Data.Address16.Maximum;
  189                         length = res->Data.Address16.AddressLength;
  190                         break;
  191                 case ACPI_RESOURCE_TYPE_ADDRESS32:
  192                         min = res->Data.Address32.Minimum;
  193                         max = res->Data.Address32.Maximum;
  194                         length = res->Data.Address32.AddressLength;
  195                         break;
  196                 case ACPI_RESOURCE_TYPE_ADDRESS64:
  197                         min = res->Data.Address64.Minimum;
  198                         max = res->Data.Address64.Maximum;
  199                         length = res->Data.Address64.AddressLength;
  200                         break;
  201                 default:
  202                         KASSERT(res->Type ==
  203                             ACPI_RESOURCE_TYPE_EXTENDED_ADDRESS64,
  204                             ("should never happen"));
  205                         min = res->Data.ExtAddress64.Minimum;
  206                         max = res->Data.ExtAddress64.Maximum;
  207                         length = res->Data.ExtAddress64.AddressLength;
  208                         break;
  209                 }
  210                 if (length == 0)
  211                         break;
  212                 if (min + length - 1 != max &&
  213                     (res->Data.Address.MinAddressFixed != ACPI_ADDRESS_FIXED ||
  214                     res->Data.Address.MaxAddressFixed != ACPI_ADDRESS_FIXED))
  215                         break;
  216                 flags = 0;
  217                 switch (res->Data.Address.ResourceType) {
  218                 case ACPI_MEMORY_RANGE:
  219                         type = SYS_RES_MEMORY;
  220                         if (res->Type != ACPI_RESOURCE_TYPE_EXTENDED_ADDRESS64) {
  221                                 if (res->Data.Address.Info.Mem.Caching ==
  222                                     ACPI_PREFETCHABLE_MEMORY)
  223                                         flags |= RF_PREFETCHABLE;
  224                         } else {
  225                                 /*
  226                                  * XXX: Parse prefetch flag out of
  227                                  * TypeSpecific.
  228                                  */
  229                         }
  230                         break;
  231                 case ACPI_IO_RANGE:
  232                         type = SYS_RES_IOPORT;
  233                         break;
  234 #ifdef PCI_RES_BUS
  235                 case ACPI_BUS_NUMBER_RANGE:
  236                         type = PCI_RES_BUS;
  237                         break;
  238 #endif
  239                 default:
  240                         return (AE_OK);
  241                 }
  242 
  243                 if (min + length - 1 != max)
  244                         device_printf(sc->ap_dev,
  245                             "Length mismatch for %d range: %jx vs %jx\n", type,
  246                             (uintmax_t)max - min + 1, (uintmax_t)length);
  247 #ifdef __i386__
  248                 if (min > ULONG_MAX) {
  249                         device_printf(sc->ap_dev,
  250                             "Ignoring %d range above 4GB (%#jx-%#jx)\n",
  251                             type, (uintmax_t)min, (uintmax_t)max);
  252                         break;
  253                 }
  254                 if (max > ULONG_MAX) {
  255                         device_printf(sc->ap_dev,
  256                     "Truncating end of %d range above 4GB (%#jx-%#jx)\n",
  257                             type, (uintmax_t)min, (uintmax_t)max);
  258                         max = ULONG_MAX;
  259                 }
  260 #endif
  261                 error = pcib_host_res_decodes(&sc->ap_host_res, type, min, max,
  262                     flags);
  263                 if (error)
  264                         panic("Failed to manage %d range (%#jx-%#jx): %d",
  265                             type, (uintmax_t)min, (uintmax_t)max, error);
  266                 break;
  267         default:
  268                 break;
  269         }
  270         return (AE_OK);
  271 }
  272 #endif
  273 
  274 static int
  275 acpi_pcib_acpi_attach(device_t dev)
  276 {
  277     struct acpi_hpcib_softc     *sc;
  278     ACPI_STATUS                 status;
  279     static int bus0_seen = 0;
  280     u_int addr, slot, func, busok;
  281     uint8_t busno;
  282 
  283     ACPI_FUNCTION_TRACE((char *)(uintptr_t)__func__);
  284 
  285     sc = device_get_softc(dev);
  286     sc->ap_dev = dev;
  287     sc->ap_handle = acpi_get_handle(dev);
  288 
  289     /*
  290      * Get our segment number by evaluating _SEG
  291      * It's OK for this to not exist.
  292      */
  293     status = acpi_GetInteger(sc->ap_handle, "_SEG", &sc->ap_segment);
  294     if (ACPI_FAILURE(status)) {
  295         if (status != AE_NOT_FOUND) {
  296             device_printf(dev, "could not evaluate _SEG - %s\n",
  297                 AcpiFormatException(status));
  298             return_VALUE (ENXIO);
  299         }
  300         /* If it's not found, assume 0. */
  301         sc->ap_segment = 0;
  302     }
  303 
  304 #ifdef NEW_PCIB
  305     /*
  306      * Determine which address ranges this bridge decodes and setup
  307      * resource managers for those ranges.
  308      */
  309     if (pcib_host_res_init(sc->ap_dev, &sc->ap_host_res) != 0)
  310             panic("failed to init hostb resources");
  311     if (!acpi_disabled("hostres")) {
  312         status = AcpiWalkResources(sc->ap_handle, "_CRS",
  313             acpi_pcib_producer_handler, sc);
  314         if (ACPI_FAILURE(status) && status != AE_NOT_FOUND)
  315             device_printf(sc->ap_dev, "failed to parse resources: %s\n",
  316                 AcpiFormatException(status));
  317     }
  318 #endif
  319 
  320     /*
  321      * Get our base bus number by evaluating _BBN.
  322      * If this doesn't work, we assume we're bus number 0.
  323      *
  324      * XXX note that it may also not exist in the case where we are
  325      *     meant to use a private configuration space mechanism for this bus,
  326      *     so we should dig out our resources and check to see if we have
  327      *     anything like that.  How do we do this?
  328      * XXX If we have the requisite information, and if we don't think the
  329      *     default PCI configuration space handlers can deal with this bus,
  330      *     we should attach our own handler.
  331      * XXX invoke _REG on this for the PCI config space address space?
  332      * XXX It seems many BIOS's with multiple Host-PCI bridges do not set
  333      *     _BBN correctly.  They set _BBN to zero for all bridges.  Thus,
  334      *     if _BBN is zero and PCI bus 0 already exists, we try to read our
  335      *     bus number from the configuration registers at address _ADR.
  336      *     We only do this for domain/segment 0 in the hopes that this is
  337      *     only needed for old single-domain machines.
  338      */
  339     status = acpi_GetInteger(sc->ap_handle, "_BBN", &sc->ap_bus);
  340     if (ACPI_FAILURE(status)) {
  341         if (status != AE_NOT_FOUND) {
  342             device_printf(dev, "could not evaluate _BBN - %s\n",
  343                 AcpiFormatException(status));
  344             return_VALUE (ENXIO);
  345         } else {
  346             /* If it's not found, assume 0. */
  347             sc->ap_bus = 0;
  348         }
  349     }
  350 
  351     /*
  352      * If this is segment 0, the bus is zero, and PCI bus 0 already
  353      * exists, read the bus number via PCI config space.
  354      */
  355     busok = 1;
  356     if (sc->ap_segment == 0 && sc->ap_bus == 0 && bus0_seen) {
  357         busok = 0;
  358         status = acpi_GetInteger(sc->ap_handle, "_ADR", &addr);
  359         if (ACPI_FAILURE(status)) {
  360             if (status != AE_NOT_FOUND) {
  361                 device_printf(dev, "could not evaluate _ADR - %s\n",
  362                     AcpiFormatException(status));
  363                 return_VALUE (ENXIO);
  364             } else
  365                 device_printf(dev, "couldn't find _ADR\n");
  366         } else {
  367             /* XXX: We assume bus 0. */
  368             slot = ACPI_ADR_PCI_SLOT(addr);
  369             func = ACPI_ADR_PCI_FUNC(addr);
  370             if (bootverbose)
  371                 device_printf(dev, "reading config registers from 0:%d:%d\n",
  372                     slot, func);
  373             if (host_pcib_get_busno(pci_cfgregread, 0, slot, func, &busno) == 0)
  374                 device_printf(dev, "couldn't read bus number from cfg space\n");
  375             else {
  376                 sc->ap_bus = busno;
  377                 busok = 1;
  378             }
  379         }
  380     }
  381 
  382     /*
  383      * If nothing else worked, hope that ACPI at least lays out the
  384      * host-PCI bridges in order and that as a result our unit number
  385      * is actually our bus number.  There are several reasons this
  386      * might not be true.
  387      */
  388     if (busok == 0) {
  389         sc->ap_bus = device_get_unit(dev);
  390         device_printf(dev, "trying bus number %d\n", sc->ap_bus);
  391     }
  392 
  393     /* If this is bus 0 on segment 0, note that it has been seen already. */
  394     if (sc->ap_segment == 0 && sc->ap_bus == 0)
  395             bus0_seen = 1;
  396 
  397     return (acpi_pcib_attach(dev, &sc->ap_prt, sc->ap_bus));
  398 }
  399 
  400 /*
  401  * Support for standard PCI bridge ivars.
  402  */
  403 static int
  404 acpi_pcib_read_ivar(device_t dev, device_t child, int which, uintptr_t *result)
  405 {
  406     struct acpi_hpcib_softc     *sc = device_get_softc(dev);
  407 
  408     switch (which) {
  409     case PCIB_IVAR_DOMAIN:
  410         *result = sc->ap_segment;
  411         return (0);
  412     case PCIB_IVAR_BUS:
  413         *result = sc->ap_bus;
  414         return (0);
  415     case ACPI_IVAR_HANDLE:
  416         *result = (uintptr_t)sc->ap_handle;
  417         return (0);
  418     case ACPI_IVAR_FLAGS:
  419         *result = (uintptr_t)sc->ap_flags;
  420         return (0);
  421     }
  422     return (ENOENT);
  423 }
  424 
  425 static int
  426 acpi_pcib_write_ivar(device_t dev, device_t child, int which, uintptr_t value)
  427 {
  428     struct acpi_hpcib_softc     *sc = device_get_softc(dev);
  429 
  430     switch (which) {
  431     case PCIB_IVAR_DOMAIN:
  432         return (EINVAL);
  433     case PCIB_IVAR_BUS:
  434         sc->ap_bus = value;
  435         return (0);
  436     case ACPI_IVAR_HANDLE:
  437         sc->ap_handle = (ACPI_HANDLE)value;
  438         return (0);
  439     case ACPI_IVAR_FLAGS:
  440         sc->ap_flags = (int)value;
  441         return (0);
  442     }
  443     return (ENOENT);
  444 }
  445 
  446 static uint32_t
  447 acpi_pcib_read_config(device_t dev, u_int bus, u_int slot, u_int func,
  448     u_int reg, int bytes)
  449 {
  450     return (pci_cfgregread(bus, slot, func, reg, bytes));
  451 }
  452 
  453 static void
  454 acpi_pcib_write_config(device_t dev, u_int bus, u_int slot, u_int func,
  455     u_int reg, uint32_t data, int bytes)
  456 {
  457     pci_cfgregwrite(bus, slot, func, reg, data, bytes);
  458 }
  459 
  460 static int
  461 acpi_pcib_acpi_route_interrupt(device_t pcib, device_t dev, int pin)
  462 {
  463     struct acpi_hpcib_softc *sc = device_get_softc(pcib);
  464 
  465     return (acpi_pcib_route_interrupt(pcib, dev, pin, &sc->ap_prt));
  466 }
  467 
  468 static int
  469 acpi_pcib_alloc_msi(device_t pcib, device_t dev, int count, int maxcount,
  470     int *irqs)
  471 {
  472         device_t bus;
  473 
  474         bus = device_get_parent(pcib);
  475         return (PCIB_ALLOC_MSI(device_get_parent(bus), dev, count, maxcount,
  476             irqs));
  477 }
  478 
  479 static int
  480 acpi_pcib_alloc_msix(device_t pcib, device_t dev, int *irq)
  481 {
  482         device_t bus;
  483 
  484         bus = device_get_parent(pcib);
  485         return (PCIB_ALLOC_MSIX(device_get_parent(bus), dev, irq));
  486 }
  487 
  488 static int
  489 acpi_pcib_map_msi(device_t pcib, device_t dev, int irq, uint64_t *addr,
  490     uint32_t *data)
  491 {
  492         device_t bus;
  493 
  494         bus = device_get_parent(pcib);
  495         return (PCIB_MAP_MSI(device_get_parent(bus), dev, irq, addr, data));
  496 }
  497 
  498 struct resource *
  499 acpi_pcib_acpi_alloc_resource(device_t dev, device_t child, int type, int *rid,
  500     u_long start, u_long end, u_long count, u_int flags)
  501 {
  502 #ifdef NEW_PCIB
  503     struct acpi_hpcib_softc *sc;
  504     struct resource *res;
  505 #endif
  506 
  507 #if defined(__i386__) || defined(__amd64__)
  508     start = hostb_alloc_start(type, start, end, count);
  509 #endif
  510 
  511 #ifdef NEW_PCIB
  512     sc = device_get_softc(dev);
  513     res = pcib_host_res_alloc(&sc->ap_host_res, child, type, rid, start, end,
  514         count, flags);
  515     if (res == NULL && start + count - 1 == end)
  516         res = acpi_alloc_sysres(child, type, rid, start, end, count, flags);
  517     return (res);
  518 #else
  519     return (bus_generic_alloc_resource(dev, child, type, rid, start, end,
  520         count, flags));
  521 #endif
  522 }
  523 
  524 #ifdef NEW_PCIB
  525 int
  526 acpi_pcib_acpi_adjust_resource(device_t dev, device_t child, int type,
  527     struct resource *r, u_long start, u_long end)
  528 {
  529         struct acpi_hpcib_softc *sc;
  530 
  531         sc = device_get_softc(dev);
  532         return (pcib_host_res_adjust(&sc->ap_host_res, child, type, r, start,
  533             end));
  534 }
  535 #endif

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