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/11.0/sys/dev/acpica/acpi_pcib_acpi.c 299286 2016-05-09 20:50:21Z jhb $");
   30 
   31 #include "opt_acpi.h"
   32 #include "opt_pci.h"
   33 
   34 #include <sys/param.h>
   35 #include <sys/bus.h>
   36 #include <sys/kernel.h>
   37 #include <sys/limits.h>
   38 #include <sys/malloc.h>
   39 #include <sys/module.h>
   40 #include <sys/rman.h>
   41 #include <sys/sysctl.h>
   42 
   43 #include <contrib/dev/acpica/include/acpi.h>
   44 #include <contrib/dev/acpica/include/accommon.h>
   45 
   46 #include <dev/acpica/acpivar.h>
   47 
   48 #include <machine/pci_cfgreg.h>
   49 #include <dev/pci/pcireg.h>
   50 #include <dev/pci/pcivar.h>
   51 #include <dev/pci/pcib_private.h>
   52 #include "pcib_if.h"
   53 
   54 #include <dev/acpica/acpi_pcibvar.h>
   55 
   56 /* Hooks for the ACPI CA debugging infrastructure. */
   57 #define _COMPONENT      ACPI_BUS
   58 ACPI_MODULE_NAME("PCI_ACPI")
   59 
   60 struct acpi_hpcib_softc {
   61     device_t            ap_dev;
   62     ACPI_HANDLE         ap_handle;
   63     int                 ap_flags;
   64 
   65     int                 ap_segment;     /* PCI domain */
   66     int                 ap_bus;         /* bios-assigned bus number */
   67     int                 ap_addr;        /* device/func of PCI-Host bridge */
   68 
   69     ACPI_BUFFER         ap_prt;         /* interrupt routing table */
   70 #ifdef NEW_PCIB
   71     struct pcib_host_resources ap_host_res;
   72 #endif
   73 };
   74 
   75 static int              acpi_pcib_acpi_probe(device_t bus);
   76 static int              acpi_pcib_acpi_attach(device_t bus);
   77 static int              acpi_pcib_read_ivar(device_t dev, device_t child,
   78                             int which, uintptr_t *result);
   79 static int              acpi_pcib_write_ivar(device_t dev, device_t child,
   80                             int which, uintptr_t value);
   81 static uint32_t         acpi_pcib_read_config(device_t dev, u_int bus,
   82                             u_int slot, u_int func, u_int reg, int bytes);
   83 static void             acpi_pcib_write_config(device_t dev, u_int bus,
   84                             u_int slot, u_int func, u_int reg, uint32_t data,
   85                             int bytes);
   86 static int              acpi_pcib_acpi_route_interrupt(device_t pcib,
   87                             device_t dev, int pin);
   88 static int              acpi_pcib_alloc_msi(device_t pcib, device_t dev,
   89                             int count, int maxcount, int *irqs);
   90 static int              acpi_pcib_map_msi(device_t pcib, device_t dev,
   91                             int irq, uint64_t *addr, uint32_t *data);
   92 static int              acpi_pcib_alloc_msix(device_t pcib, device_t dev,
   93                             int *irq);
   94 static struct resource *acpi_pcib_acpi_alloc_resource(device_t dev,
   95                             device_t child, int type, int *rid,
   96                             rman_res_t start, rman_res_t end, rman_res_t count,
   97                             u_int flags);
   98 #ifdef NEW_PCIB
   99 static int              acpi_pcib_acpi_adjust_resource(device_t dev,
  100                             device_t child, int type, struct resource *r,
  101                             rman_res_t start, rman_res_t end);
  102 #ifdef PCI_RES_BUS
  103 static int              acpi_pcib_acpi_release_resource(device_t dev,
  104                             device_t child, int type, int rid,
  105                             struct resource *r);
  106 #endif
  107 #endif
  108 
  109 static device_method_t acpi_pcib_acpi_methods[] = {
  110     /* Device interface */
  111     DEVMETHOD(device_probe,             acpi_pcib_acpi_probe),
  112     DEVMETHOD(device_attach,            acpi_pcib_acpi_attach),
  113     DEVMETHOD(device_shutdown,          bus_generic_shutdown),
  114     DEVMETHOD(device_suspend,           bus_generic_suspend),
  115     DEVMETHOD(device_resume,            bus_generic_resume),
  116 
  117     /* Bus interface */
  118     DEVMETHOD(bus_read_ivar,            acpi_pcib_read_ivar),
  119     DEVMETHOD(bus_write_ivar,           acpi_pcib_write_ivar),
  120     DEVMETHOD(bus_alloc_resource,       acpi_pcib_acpi_alloc_resource),
  121 #ifdef NEW_PCIB
  122     DEVMETHOD(bus_adjust_resource,      acpi_pcib_acpi_adjust_resource),
  123 #else
  124     DEVMETHOD(bus_adjust_resource,      bus_generic_adjust_resource),
  125 #endif
  126 #if defined(NEW_PCIB) && defined(PCI_RES_BUS)
  127     DEVMETHOD(bus_release_resource,     acpi_pcib_acpi_release_resource),
  128 #else
  129     DEVMETHOD(bus_release_resource,     bus_generic_release_resource),
  130 #endif
  131     DEVMETHOD(bus_activate_resource,    bus_generic_activate_resource),
  132     DEVMETHOD(bus_deactivate_resource,  bus_generic_deactivate_resource),
  133     DEVMETHOD(bus_setup_intr,           bus_generic_setup_intr),
  134     DEVMETHOD(bus_teardown_intr,        bus_generic_teardown_intr),
  135     DEVMETHOD(bus_get_cpus,             acpi_pcib_get_cpus),
  136 
  137     /* pcib interface */
  138     DEVMETHOD(pcib_maxslots,            pcib_maxslots),
  139     DEVMETHOD(pcib_read_config,         acpi_pcib_read_config),
  140     DEVMETHOD(pcib_write_config,        acpi_pcib_write_config),
  141     DEVMETHOD(pcib_route_interrupt,     acpi_pcib_acpi_route_interrupt),
  142     DEVMETHOD(pcib_alloc_msi,           acpi_pcib_alloc_msi),
  143     DEVMETHOD(pcib_release_msi,         pcib_release_msi),
  144     DEVMETHOD(pcib_alloc_msix,          acpi_pcib_alloc_msix),
  145     DEVMETHOD(pcib_release_msix,        pcib_release_msix),
  146     DEVMETHOD(pcib_map_msi,             acpi_pcib_map_msi),
  147     DEVMETHOD(pcib_power_for_sleep,     acpi_pcib_power_for_sleep),
  148 
  149     DEVMETHOD_END
  150 };
  151 
  152 static devclass_t pcib_devclass;
  153 
  154 DEFINE_CLASS_0(pcib, acpi_pcib_acpi_driver, acpi_pcib_acpi_methods,
  155     sizeof(struct acpi_hpcib_softc));
  156 DRIVER_MODULE(acpi_pcib, acpi, acpi_pcib_acpi_driver, pcib_devclass, 0, 0);
  157 MODULE_DEPEND(acpi_pcib, acpi, 1, 1, 1);
  158 
  159 static int
  160 acpi_pcib_acpi_probe(device_t dev)
  161 {
  162     ACPI_DEVICE_INFO    *devinfo;
  163     ACPI_HANDLE         h;
  164     int                 root;
  165 
  166     if (acpi_disabled("pcib") || (h = acpi_get_handle(dev)) == NULL ||
  167         ACPI_FAILURE(AcpiGetObjectInfo(h, &devinfo)))
  168         return (ENXIO);
  169     root = (devinfo->Flags & ACPI_PCI_ROOT_BRIDGE) != 0;
  170     AcpiOsFree(devinfo);
  171     if (!root || pci_cfgregopen() == 0)
  172         return (ENXIO);
  173 
  174     device_set_desc(dev, "ACPI Host-PCI bridge");
  175     return (0);
  176 }
  177 
  178 #ifdef NEW_PCIB
  179 static ACPI_STATUS
  180 acpi_pcib_producer_handler(ACPI_RESOURCE *res, void *context)
  181 {
  182         struct acpi_hpcib_softc *sc;
  183         UINT64 length, min, max;
  184         u_int flags;
  185         int error, type;
  186 
  187         sc = context;
  188         switch (res->Type) {
  189         case ACPI_RESOURCE_TYPE_START_DEPENDENT:
  190         case ACPI_RESOURCE_TYPE_END_DEPENDENT:
  191                 panic("host bridge has depenedent resources");
  192         case ACPI_RESOURCE_TYPE_ADDRESS16:
  193         case ACPI_RESOURCE_TYPE_ADDRESS32:
  194         case ACPI_RESOURCE_TYPE_ADDRESS64:
  195         case ACPI_RESOURCE_TYPE_EXTENDED_ADDRESS64:
  196                 if (res->Data.Address.ProducerConsumer != ACPI_PRODUCER)
  197                         break;
  198                 switch (res->Type) {
  199                 case ACPI_RESOURCE_TYPE_ADDRESS16:
  200                         min = res->Data.Address16.Address.Minimum;
  201                         max = res->Data.Address16.Address.Maximum;
  202                         length = res->Data.Address16.Address.AddressLength;
  203                         break;
  204                 case ACPI_RESOURCE_TYPE_ADDRESS32:
  205                         min = res->Data.Address32.Address.Minimum;
  206                         max = res->Data.Address32.Address.Maximum;
  207                         length = res->Data.Address32.Address.AddressLength;
  208                         break;
  209                 case ACPI_RESOURCE_TYPE_ADDRESS64:
  210                         min = res->Data.Address64.Address.Minimum;
  211                         max = res->Data.Address64.Address.Maximum;
  212                         length = res->Data.Address64.Address.AddressLength;
  213                         break;
  214                 default:
  215                         KASSERT(res->Type ==
  216                             ACPI_RESOURCE_TYPE_EXTENDED_ADDRESS64,
  217                             ("should never happen"));
  218                         min = res->Data.ExtAddress64.Address.Minimum;
  219                         max = res->Data.ExtAddress64.Address.Maximum;
  220                         length = res->Data.ExtAddress64.Address.AddressLength;
  221                         break;
  222                 }
  223                 if (length == 0)
  224                         break;
  225                 if (min + length - 1 != max &&
  226                     (res->Data.Address.MinAddressFixed != ACPI_ADDRESS_FIXED ||
  227                     res->Data.Address.MaxAddressFixed != ACPI_ADDRESS_FIXED))
  228                         break;
  229                 flags = 0;
  230                 switch (res->Data.Address.ResourceType) {
  231                 case ACPI_MEMORY_RANGE:
  232                         type = SYS_RES_MEMORY;
  233                         if (res->Type != ACPI_RESOURCE_TYPE_EXTENDED_ADDRESS64) {
  234                                 if (res->Data.Address.Info.Mem.Caching ==
  235                                     ACPI_PREFETCHABLE_MEMORY)
  236                                         flags |= RF_PREFETCHABLE;
  237                         } else {
  238                                 /*
  239                                  * XXX: Parse prefetch flag out of
  240                                  * TypeSpecific.
  241                                  */
  242                         }
  243                         break;
  244                 case ACPI_IO_RANGE:
  245                         type = SYS_RES_IOPORT;
  246                         break;
  247 #ifdef PCI_RES_BUS
  248                 case ACPI_BUS_NUMBER_RANGE:
  249                         type = PCI_RES_BUS;
  250                         break;
  251 #endif
  252                 default:
  253                         return (AE_OK);
  254                 }
  255 
  256                 if (min + length - 1 != max)
  257                         device_printf(sc->ap_dev,
  258                             "Length mismatch for %d range: %jx vs %jx\n", type,
  259                             (uintmax_t)(max - min + 1), (uintmax_t)length);
  260 #ifdef __i386__
  261                 if (min > ULONG_MAX) {
  262                         device_printf(sc->ap_dev,
  263                             "Ignoring %d range above 4GB (%#jx-%#jx)\n",
  264                             type, (uintmax_t)min, (uintmax_t)max);
  265                         break;
  266                 }
  267                 if (max > ULONG_MAX) {
  268                         device_printf(sc->ap_dev,
  269                     "Truncating end of %d range above 4GB (%#jx-%#jx)\n",
  270                             type, (uintmax_t)min, (uintmax_t)max);
  271                         max = ULONG_MAX;
  272                 }
  273 #endif
  274                 error = pcib_host_res_decodes(&sc->ap_host_res, type, min, max,
  275                     flags);
  276                 if (error)
  277                         panic("Failed to manage %d range (%#jx-%#jx): %d",
  278                             type, (uintmax_t)min, (uintmax_t)max, error);
  279                 break;
  280         default:
  281                 break;
  282         }
  283         return (AE_OK);
  284 }
  285 #endif
  286 
  287 #if defined(NEW_PCIB) && defined(PCI_RES_BUS)
  288 static int
  289 first_decoded_bus(struct acpi_hpcib_softc *sc, rman_res_t *startp)
  290 {
  291         struct resource_list_entry *rle;
  292 
  293         rle = resource_list_find(&sc->ap_host_res.hr_rl, PCI_RES_BUS, 0);
  294         if (rle == NULL)
  295                 return (ENXIO);
  296         *startp = rle->start;
  297         return (0);
  298 }
  299 #endif
  300 
  301 static void
  302 acpi_pcib_osc(struct acpi_hpcib_softc *sc)
  303 {
  304         ACPI_STATUS status;
  305         uint32_t cap_set[3];
  306 
  307         static uint8_t pci_host_bridge_uuid[ACPI_UUID_LENGTH] = {
  308                 0x5b, 0x4d, 0xdb, 0x33, 0xf7, 0x1f, 0x1c, 0x40,
  309                 0x96, 0x57, 0x74, 0x41, 0xc0, 0x3d, 0xd7, 0x66
  310         };
  311 
  312         /* Support Field: Extended PCI Config Space, MSI */
  313         cap_set[1] = 0x11;
  314 
  315         /* Control Field */
  316         cap_set[2] = 0;
  317 
  318 #ifdef PCI_HP
  319         /* Control Field: PCI Express Native Hot Plug */
  320         cap_set[2] |= 0x1;
  321 #endif
  322 
  323         status = acpi_EvaluateOSC(sc->ap_handle, pci_host_bridge_uuid, 1,
  324             nitems(cap_set), cap_set, cap_set, false);
  325         if (ACPI_FAILURE(status)) {
  326                 if (status == AE_NOT_FOUND)
  327                         return;
  328                 device_printf(sc->ap_dev, "_OSC failed: %s\n",
  329                     AcpiFormatException(status));
  330                 return;
  331         }
  332 
  333         if (cap_set[0] != 0) {
  334                 device_printf(sc->ap_dev, "_OSC returned error %#x\n",
  335                     cap_set[0]);
  336         }
  337 }
  338 
  339 static int
  340 acpi_pcib_acpi_attach(device_t dev)
  341 {
  342     struct acpi_hpcib_softc     *sc;
  343     ACPI_STATUS                 status;
  344     static int bus0_seen = 0;
  345     u_int slot, func, busok;
  346 #if defined(NEW_PCIB) && defined(PCI_RES_BUS)
  347     struct resource *bus_res;
  348     rman_res_t start;
  349     int rid;
  350 #endif
  351     uint8_t busno;
  352 
  353     ACPI_FUNCTION_TRACE((char *)(uintptr_t)__func__);
  354 
  355     sc = device_get_softc(dev);
  356     sc->ap_dev = dev;
  357     sc->ap_handle = acpi_get_handle(dev);
  358 
  359     /*
  360      * Don't attach if we're not really there.
  361      */
  362     if (!acpi_DeviceIsPresent(dev))
  363         return (ENXIO);
  364 
  365     acpi_pcib_osc(sc);
  366 
  367     /*
  368      * Get our segment number by evaluating _SEG.
  369      * It's OK for this to not exist.
  370      */
  371     status = acpi_GetInteger(sc->ap_handle, "_SEG", &sc->ap_segment);
  372     if (ACPI_FAILURE(status)) {
  373         if (status != AE_NOT_FOUND) {
  374             device_printf(dev, "could not evaluate _SEG - %s\n",
  375                 AcpiFormatException(status));
  376             return_VALUE (ENXIO);
  377         }
  378         /* If it's not found, assume 0. */
  379         sc->ap_segment = 0;
  380     }
  381 
  382     /*
  383      * Get the address (device and function) of the associated
  384      * PCI-Host bridge device from _ADR.  Assume we don't have one if
  385      * it doesn't exist.
  386      */
  387     status = acpi_GetInteger(sc->ap_handle, "_ADR", &sc->ap_addr);
  388     if (ACPI_FAILURE(status)) {
  389         device_printf(dev, "could not evaluate _ADR - %s\n",
  390             AcpiFormatException(status));
  391         sc->ap_addr = -1;
  392     }
  393 
  394 #ifdef NEW_PCIB
  395     /*
  396      * Determine which address ranges this bridge decodes and setup
  397      * resource managers for those ranges.
  398      */
  399     if (pcib_host_res_init(sc->ap_dev, &sc->ap_host_res) != 0)
  400             panic("failed to init hostb resources");
  401     if (!acpi_disabled("hostres")) {
  402         status = AcpiWalkResources(sc->ap_handle, "_CRS",
  403             acpi_pcib_producer_handler, sc);
  404         if (ACPI_FAILURE(status) && status != AE_NOT_FOUND)
  405             device_printf(sc->ap_dev, "failed to parse resources: %s\n",
  406                 AcpiFormatException(status));
  407     }
  408 #endif
  409 
  410     /*
  411      * Get our base bus number by evaluating _BBN.
  412      * If this doesn't work, we assume we're bus number 0.
  413      *
  414      * XXX note that it may also not exist in the case where we are
  415      *     meant to use a private configuration space mechanism for this bus,
  416      *     so we should dig out our resources and check to see if we have
  417      *     anything like that.  How do we do this?
  418      * XXX If we have the requisite information, and if we don't think the
  419      *     default PCI configuration space handlers can deal with this bus,
  420      *     we should attach our own handler.
  421      * XXX invoke _REG on this for the PCI config space address space?
  422      * XXX It seems many BIOS's with multiple Host-PCI bridges do not set
  423      *     _BBN correctly.  They set _BBN to zero for all bridges.  Thus,
  424      *     if _BBN is zero and PCI bus 0 already exists, we try to read our
  425      *     bus number from the configuration registers at address _ADR.
  426      *     We only do this for domain/segment 0 in the hopes that this is
  427      *     only needed for old single-domain machines.
  428      */
  429     status = acpi_GetInteger(sc->ap_handle, "_BBN", &sc->ap_bus);
  430     if (ACPI_FAILURE(status)) {
  431         if (status != AE_NOT_FOUND) {
  432             device_printf(dev, "could not evaluate _BBN - %s\n",
  433                 AcpiFormatException(status));
  434             return (ENXIO);
  435         } else {
  436             /* If it's not found, assume 0. */
  437             sc->ap_bus = 0;
  438         }
  439     }
  440 
  441     /*
  442      * If this is segment 0, the bus is zero, and PCI bus 0 already
  443      * exists, read the bus number via PCI config space.
  444      */
  445     busok = 1;
  446     if (sc->ap_segment == 0 && sc->ap_bus == 0 && bus0_seen) {
  447         busok = 0;
  448         if (sc->ap_addr != -1) {
  449             /* XXX: We assume bus 0. */
  450             slot = ACPI_ADR_PCI_SLOT(sc->ap_addr);
  451             func = ACPI_ADR_PCI_FUNC(sc->ap_addr);
  452             if (bootverbose)
  453                 device_printf(dev, "reading config registers from 0:%d:%d\n",
  454                     slot, func);
  455             if (host_pcib_get_busno(pci_cfgregread, 0, slot, func, &busno) == 0)
  456                 device_printf(dev, "couldn't read bus number from cfg space\n");
  457             else {
  458                 sc->ap_bus = busno;
  459                 busok = 1;
  460             }
  461         }
  462     }
  463 
  464 #if defined(NEW_PCIB) && defined(PCI_RES_BUS)
  465     /*
  466      * If nothing else worked, hope that ACPI at least lays out the
  467      * Host-PCI bridges in order and that as a result the next free
  468      * bus number is our bus number.
  469      */
  470     if (busok == 0) {
  471             /*
  472              * If we have a region of bus numbers, use the first
  473              * number for our bus.
  474              */
  475             if (first_decoded_bus(sc, &start) == 0)
  476                     sc->ap_bus = start;
  477             else {
  478                     rid = 0;
  479                     bus_res = pci_domain_alloc_bus(sc->ap_segment, dev, &rid, 0,
  480                         PCI_BUSMAX, 1, 0);
  481                     if (bus_res == NULL) {
  482                             device_printf(dev,
  483                                 "could not allocate bus number\n");
  484                             pcib_host_res_free(dev, &sc->ap_host_res);
  485                             return (ENXIO);
  486                     }
  487                     sc->ap_bus = rman_get_start(bus_res);
  488                     pci_domain_release_bus(sc->ap_segment, dev, rid, bus_res);
  489             }
  490     } else {
  491 #ifdef INVARIANTS
  492             if (first_decoded_bus(sc, &start) == 0)
  493                     KASSERT(start == sc->ap_bus, ("bus number mismatch"));
  494 #endif
  495     }
  496 #else
  497     /*
  498      * If nothing else worked, hope that ACPI at least lays out the
  499      * host-PCI bridges in order and that as a result our unit number
  500      * is actually our bus number.  There are several reasons this
  501      * might not be true.
  502      */
  503     if (busok == 0) {
  504         sc->ap_bus = device_get_unit(dev);
  505         device_printf(dev, "trying bus number %d\n", sc->ap_bus);
  506     }
  507 #endif
  508 
  509     /* If this is bus 0 on segment 0, note that it has been seen already. */
  510     if (sc->ap_segment == 0 && sc->ap_bus == 0)
  511             bus0_seen = 1;
  512 
  513     acpi_pcib_fetch_prt(dev, &sc->ap_prt);
  514 
  515     if (device_add_child(dev, "pci", -1) == NULL) {
  516         device_printf(device_get_parent(dev), "couldn't attach pci bus\n");
  517         return (ENXIO);
  518     }
  519     return (bus_generic_attach(dev));
  520 }
  521 
  522 /*
  523  * Support for standard PCI bridge ivars.
  524  */
  525 static int
  526 acpi_pcib_read_ivar(device_t dev, device_t child, int which, uintptr_t *result)
  527 {
  528     struct acpi_hpcib_softc     *sc = device_get_softc(dev);
  529 
  530     switch (which) {
  531     case PCIB_IVAR_DOMAIN:
  532         *result = sc->ap_segment;
  533         return (0);
  534     case PCIB_IVAR_BUS:
  535         *result = sc->ap_bus;
  536         return (0);
  537     case ACPI_IVAR_HANDLE:
  538         *result = (uintptr_t)sc->ap_handle;
  539         return (0);
  540     case ACPI_IVAR_FLAGS:
  541         *result = (uintptr_t)sc->ap_flags;
  542         return (0);
  543     }
  544     return (ENOENT);
  545 }
  546 
  547 static int
  548 acpi_pcib_write_ivar(device_t dev, device_t child, int which, uintptr_t value)
  549 {
  550     struct acpi_hpcib_softc     *sc = device_get_softc(dev);
  551 
  552     switch (which) {
  553     case PCIB_IVAR_DOMAIN:
  554         return (EINVAL);
  555     case PCIB_IVAR_BUS:
  556         sc->ap_bus = value;
  557         return (0);
  558     case ACPI_IVAR_HANDLE:
  559         sc->ap_handle = (ACPI_HANDLE)value;
  560         return (0);
  561     case ACPI_IVAR_FLAGS:
  562         sc->ap_flags = (int)value;
  563         return (0);
  564     }
  565     return (ENOENT);
  566 }
  567 
  568 static uint32_t
  569 acpi_pcib_read_config(device_t dev, u_int bus, u_int slot, u_int func,
  570     u_int reg, int bytes)
  571 {
  572     return (pci_cfgregread(bus, slot, func, reg, bytes));
  573 }
  574 
  575 static void
  576 acpi_pcib_write_config(device_t dev, u_int bus, u_int slot, u_int func,
  577     u_int reg, uint32_t data, int bytes)
  578 {
  579     pci_cfgregwrite(bus, slot, func, reg, data, bytes);
  580 }
  581 
  582 static int
  583 acpi_pcib_acpi_route_interrupt(device_t pcib, device_t dev, int pin)
  584 {
  585     struct acpi_hpcib_softc *sc = device_get_softc(pcib);
  586 
  587     return (acpi_pcib_route_interrupt(pcib, dev, pin, &sc->ap_prt));
  588 }
  589 
  590 static int
  591 acpi_pcib_alloc_msi(device_t pcib, device_t dev, int count, int maxcount,
  592     int *irqs)
  593 {
  594         device_t bus;
  595 
  596         bus = device_get_parent(pcib);
  597         return (PCIB_ALLOC_MSI(device_get_parent(bus), dev, count, maxcount,
  598             irqs));
  599 }
  600 
  601 static int
  602 acpi_pcib_alloc_msix(device_t pcib, device_t dev, int *irq)
  603 {
  604         device_t bus;
  605 
  606         bus = device_get_parent(pcib);
  607         return (PCIB_ALLOC_MSIX(device_get_parent(bus), dev, irq));
  608 }
  609 
  610 static int
  611 acpi_pcib_map_msi(device_t pcib, device_t dev, int irq, uint64_t *addr,
  612     uint32_t *data)
  613 {
  614         struct acpi_hpcib_softc *sc;
  615         device_t bus, hostb;
  616         int error;
  617 
  618         bus = device_get_parent(pcib);
  619         error = PCIB_MAP_MSI(device_get_parent(bus), dev, irq, addr, data);
  620         if (error)
  621                 return (error);
  622 
  623         sc = device_get_softc(pcib);
  624         if (sc->ap_addr == -1)
  625                 return (0);
  626         /* XXX: Assumes all bridges are on bus 0. */
  627         hostb = pci_find_dbsf(sc->ap_segment, 0, ACPI_ADR_PCI_SLOT(sc->ap_addr),
  628             ACPI_ADR_PCI_FUNC(sc->ap_addr));
  629         if (hostb != NULL)
  630                 pci_ht_map_msi(hostb, *addr);
  631         return (0);
  632 }
  633 
  634 struct resource *
  635 acpi_pcib_acpi_alloc_resource(device_t dev, device_t child, int type, int *rid,
  636     rman_res_t start, rman_res_t end, rman_res_t count, u_int flags)
  637 {
  638 #ifdef NEW_PCIB
  639     struct acpi_hpcib_softc *sc;
  640     struct resource *res;
  641 #endif
  642 
  643 #if defined(__i386__) || defined(__amd64__)
  644     start = hostb_alloc_start(type, start, end, count);
  645 #endif
  646 
  647 #ifdef NEW_PCIB
  648     sc = device_get_softc(dev);
  649 #ifdef PCI_RES_BUS
  650     if (type == PCI_RES_BUS)
  651         return (pci_domain_alloc_bus(sc->ap_segment, child, rid, start, end,
  652             count, flags));
  653 #endif
  654     res = pcib_host_res_alloc(&sc->ap_host_res, child, type, rid, start, end,
  655         count, flags);
  656 
  657     /*
  658      * XXX: If this is a request for a specific range, assume it is
  659      * correct and pass it up to the parent.  What we probably want to
  660      * do long-term is explicitly trust any firmware-configured
  661      * resources during the initial bus scan on boot and then disable
  662      * this after that.
  663      */
  664     if (res == NULL && start + count - 1 == end)
  665         res = bus_generic_alloc_resource(dev, child, type, rid, start, end,
  666             count, flags);
  667     return (res);
  668 #else
  669     return (bus_generic_alloc_resource(dev, child, type, rid, start, end,
  670         count, flags));
  671 #endif
  672 }
  673 
  674 #ifdef NEW_PCIB
  675 int
  676 acpi_pcib_acpi_adjust_resource(device_t dev, device_t child, int type,
  677     struct resource *r, rman_res_t start, rman_res_t end)
  678 {
  679         struct acpi_hpcib_softc *sc;
  680 
  681         sc = device_get_softc(dev);
  682 #ifdef PCI_RES_BUS
  683         if (type == PCI_RES_BUS)
  684                 return (pci_domain_adjust_bus(sc->ap_segment, child, r, start,
  685                     end));
  686 #endif
  687         return (pcib_host_res_adjust(&sc->ap_host_res, child, type, r, start,
  688             end));
  689 }
  690 
  691 #ifdef PCI_RES_BUS
  692 int
  693 acpi_pcib_acpi_release_resource(device_t dev, device_t child, int type, int rid,
  694     struct resource *r)
  695 {
  696         struct acpi_hpcib_softc *sc;
  697 
  698         sc = device_get_softc(dev);
  699         if (type == PCI_RES_BUS)
  700                 return (pci_domain_release_bus(sc->ap_segment, child, rid, r));
  701         return (bus_generic_release_resource(dev, child, type, rid, r));
  702 }
  703 #endif
  704 #endif

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