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("$FreeBSD$");
   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     bus_dma_tag_t       ap_dma_tag;
   64     int                 ap_flags;
   65     uint32_t            ap_osc_ctl;
   66 
   67     int                 ap_segment;     /* PCI domain */
   68     int                 ap_bus;         /* bios-assigned bus number */
   69     int                 ap_addr;        /* device/func of PCI-Host bridge */
   70 
   71     ACPI_BUFFER         ap_prt;         /* interrupt routing table */
   72 #ifdef NEW_PCIB
   73     struct pcib_host_resources ap_host_res;
   74 #endif
   75 };
   76 
   77 static int              acpi_pcib_acpi_probe(device_t bus);
   78 static int              acpi_pcib_acpi_attach(device_t bus);
   79 static int              acpi_pcib_read_ivar(device_t dev, device_t child,
   80                             int which, uintptr_t *result);
   81 static int              acpi_pcib_write_ivar(device_t dev, device_t child,
   82                             int which, uintptr_t value);
   83 static uint32_t         acpi_pcib_read_config(device_t dev, u_int bus,
   84                             u_int slot, u_int func, u_int reg, int bytes);
   85 static void             acpi_pcib_write_config(device_t dev, u_int bus,
   86                             u_int slot, u_int func, u_int reg, uint32_t data,
   87                             int bytes);
   88 static int              acpi_pcib_acpi_route_interrupt(device_t pcib,
   89                             device_t dev, int pin);
   90 static int              acpi_pcib_alloc_msi(device_t pcib, device_t dev,
   91                             int count, int maxcount, int *irqs);
   92 static int              acpi_pcib_map_msi(device_t pcib, device_t dev,
   93                             int irq, uint64_t *addr, uint32_t *data);
   94 static int              acpi_pcib_alloc_msix(device_t pcib, device_t dev,
   95                             int *irq);
   96 static struct resource *acpi_pcib_acpi_alloc_resource(device_t dev,
   97                             device_t child, int type, int *rid,
   98                             rman_res_t start, rman_res_t end, rman_res_t count,
   99                             u_int flags);
  100 #ifdef NEW_PCIB
  101 static int              acpi_pcib_acpi_adjust_resource(device_t dev,
  102                             device_t child, int type, struct resource *r,
  103                             rman_res_t start, rman_res_t end);
  104 #ifdef PCI_RES_BUS
  105 static int              acpi_pcib_acpi_release_resource(device_t dev,
  106                             device_t child, int type, int rid,
  107                             struct resource *r);
  108 #endif
  109 #endif
  110 static int              acpi_pcib_request_feature(device_t pcib, device_t dev,
  111                             enum pci_feature feature);
  112 static bus_dma_tag_t    acpi_pcib_get_dma_tag(device_t bus, device_t child);
  113 
  114 static device_method_t acpi_pcib_acpi_methods[] = {
  115     /* Device interface */
  116     DEVMETHOD(device_probe,             acpi_pcib_acpi_probe),
  117     DEVMETHOD(device_attach,            acpi_pcib_acpi_attach),
  118     DEVMETHOD(device_shutdown,          bus_generic_shutdown),
  119     DEVMETHOD(device_suspend,           bus_generic_suspend),
  120     DEVMETHOD(device_resume,            bus_generic_resume),
  121 
  122     /* Bus interface */
  123     DEVMETHOD(bus_read_ivar,            acpi_pcib_read_ivar),
  124     DEVMETHOD(bus_write_ivar,           acpi_pcib_write_ivar),
  125     DEVMETHOD(bus_alloc_resource,       acpi_pcib_acpi_alloc_resource),
  126 #ifdef NEW_PCIB
  127     DEVMETHOD(bus_adjust_resource,      acpi_pcib_acpi_adjust_resource),
  128 #else
  129     DEVMETHOD(bus_adjust_resource,      bus_generic_adjust_resource),
  130 #endif
  131 #if defined(NEW_PCIB) && defined(PCI_RES_BUS)
  132     DEVMETHOD(bus_release_resource,     acpi_pcib_acpi_release_resource),
  133 #else
  134     DEVMETHOD(bus_release_resource,     bus_generic_release_resource),
  135 #endif
  136     DEVMETHOD(bus_activate_resource,    bus_generic_activate_resource),
  137     DEVMETHOD(bus_deactivate_resource,  bus_generic_deactivate_resource),
  138     DEVMETHOD(bus_setup_intr,           bus_generic_setup_intr),
  139     DEVMETHOD(bus_teardown_intr,        bus_generic_teardown_intr),
  140     DEVMETHOD(bus_get_cpus,             acpi_pcib_get_cpus),
  141     DEVMETHOD(bus_get_dma_tag,          acpi_pcib_get_dma_tag),
  142 
  143     /* pcib interface */
  144     DEVMETHOD(pcib_maxslots,            pcib_maxslots),
  145     DEVMETHOD(pcib_read_config,         acpi_pcib_read_config),
  146     DEVMETHOD(pcib_write_config,        acpi_pcib_write_config),
  147     DEVMETHOD(pcib_route_interrupt,     acpi_pcib_acpi_route_interrupt),
  148     DEVMETHOD(pcib_alloc_msi,           acpi_pcib_alloc_msi),
  149     DEVMETHOD(pcib_release_msi,         pcib_release_msi),
  150     DEVMETHOD(pcib_alloc_msix,          acpi_pcib_alloc_msix),
  151     DEVMETHOD(pcib_release_msix,        pcib_release_msix),
  152     DEVMETHOD(pcib_map_msi,             acpi_pcib_map_msi),
  153     DEVMETHOD(pcib_power_for_sleep,     acpi_pcib_power_for_sleep),
  154     DEVMETHOD(pcib_request_feature,     acpi_pcib_request_feature),
  155 
  156     DEVMETHOD_END
  157 };
  158 
  159 DEFINE_CLASS_0(pcib, acpi_pcib_acpi_driver, acpi_pcib_acpi_methods,
  160     sizeof(struct acpi_hpcib_softc));
  161 DRIVER_MODULE(acpi_pcib, acpi, acpi_pcib_acpi_driver, 0, 0);
  162 MODULE_DEPEND(acpi_pcib, acpi, 1, 1, 1);
  163 
  164 static int
  165 acpi_pcib_acpi_probe(device_t dev)
  166 {
  167     ACPI_DEVICE_INFO    *devinfo;
  168     ACPI_HANDLE         h;
  169     int                 root;
  170 
  171     if (acpi_disabled("pcib") || (h = acpi_get_handle(dev)) == NULL ||
  172         ACPI_FAILURE(AcpiGetObjectInfo(h, &devinfo)))
  173         return (ENXIO);
  174     root = (devinfo->Flags & ACPI_PCI_ROOT_BRIDGE) != 0;
  175     AcpiOsFree(devinfo);
  176     if (!root || pci_cfgregopen() == 0)
  177         return (ENXIO);
  178 
  179     device_set_desc(dev, "ACPI Host-PCI bridge");
  180     return (0);
  181 }
  182 
  183 #ifdef NEW_PCIB
  184 static ACPI_STATUS
  185 acpi_pcib_producer_handler(ACPI_RESOURCE *res, void *context)
  186 {
  187         struct acpi_hpcib_softc *sc;
  188         UINT64 length, min, max;
  189         u_int flags;
  190         int error, type;
  191 
  192         sc = context;
  193         switch (res->Type) {
  194         case ACPI_RESOURCE_TYPE_START_DEPENDENT:
  195         case ACPI_RESOURCE_TYPE_END_DEPENDENT:
  196                 panic("host bridge has depenedent resources");
  197         case ACPI_RESOURCE_TYPE_ADDRESS16:
  198         case ACPI_RESOURCE_TYPE_ADDRESS32:
  199         case ACPI_RESOURCE_TYPE_ADDRESS64:
  200         case ACPI_RESOURCE_TYPE_EXTENDED_ADDRESS64:
  201                 if (res->Data.Address.ProducerConsumer != ACPI_PRODUCER)
  202                         break;
  203                 switch (res->Type) {
  204                 case ACPI_RESOURCE_TYPE_ADDRESS16:
  205                         min = res->Data.Address16.Address.Minimum;
  206                         max = res->Data.Address16.Address.Maximum;
  207                         length = res->Data.Address16.Address.AddressLength;
  208                         break;
  209                 case ACPI_RESOURCE_TYPE_ADDRESS32:
  210                         min = res->Data.Address32.Address.Minimum;
  211                         max = res->Data.Address32.Address.Maximum;
  212                         length = res->Data.Address32.Address.AddressLength;
  213                         break;
  214                 case ACPI_RESOURCE_TYPE_ADDRESS64:
  215                         min = res->Data.Address64.Address.Minimum;
  216                         max = res->Data.Address64.Address.Maximum;
  217                         length = res->Data.Address64.Address.AddressLength;
  218                         break;
  219                 default:
  220                         KASSERT(res->Type ==
  221                             ACPI_RESOURCE_TYPE_EXTENDED_ADDRESS64,
  222                             ("should never happen"));
  223                         min = res->Data.ExtAddress64.Address.Minimum;
  224                         max = res->Data.ExtAddress64.Address.Maximum;
  225                         length = res->Data.ExtAddress64.Address.AddressLength;
  226                         break;
  227                 }
  228                 if (length == 0)
  229                         break;
  230                 if (min + length - 1 != max &&
  231                     (res->Data.Address.MinAddressFixed != ACPI_ADDRESS_FIXED ||
  232                     res->Data.Address.MaxAddressFixed != ACPI_ADDRESS_FIXED))
  233                         break;
  234                 flags = 0;
  235                 switch (res->Data.Address.ResourceType) {
  236                 case ACPI_MEMORY_RANGE:
  237                         type = SYS_RES_MEMORY;
  238                         if (res->Type != ACPI_RESOURCE_TYPE_EXTENDED_ADDRESS64) {
  239                                 if (res->Data.Address.Info.Mem.Caching ==
  240                                     ACPI_PREFETCHABLE_MEMORY)
  241                                         flags |= RF_PREFETCHABLE;
  242                         } else {
  243                                 /*
  244                                  * XXX: Parse prefetch flag out of
  245                                  * TypeSpecific.
  246                                  */
  247                         }
  248                         break;
  249                 case ACPI_IO_RANGE:
  250                         type = SYS_RES_IOPORT;
  251                         break;
  252 #ifdef PCI_RES_BUS
  253                 case ACPI_BUS_NUMBER_RANGE:
  254                         type = PCI_RES_BUS;
  255                         break;
  256 #endif
  257                 default:
  258                         return (AE_OK);
  259                 }
  260 
  261                 if (min + length - 1 != max)
  262                         device_printf(sc->ap_dev,
  263                             "Length mismatch for %d range: %jx vs %jx\n", type,
  264                             (uintmax_t)(max - min + 1), (uintmax_t)length);
  265 #ifdef __i386__
  266                 if (min > ULONG_MAX) {
  267                         device_printf(sc->ap_dev,
  268                             "Ignoring %d range above 4GB (%#jx-%#jx)\n",
  269                             type, (uintmax_t)min, (uintmax_t)max);
  270                         break;
  271                 }
  272                 if (max > ULONG_MAX) {
  273                         device_printf(sc->ap_dev,
  274                     "Truncating end of %d range above 4GB (%#jx-%#jx)\n",
  275                             type, (uintmax_t)min, (uintmax_t)max);
  276                         max = ULONG_MAX;
  277                 }
  278 #endif
  279                 error = pcib_host_res_decodes(&sc->ap_host_res, type, min, max,
  280                     flags);
  281                 if (error)
  282                         panic("Failed to manage %d range (%#jx-%#jx): %d",
  283                             type, (uintmax_t)min, (uintmax_t)max, error);
  284                 break;
  285         default:
  286                 break;
  287         }
  288         return (AE_OK);
  289 }
  290 #endif
  291 
  292 #if defined(NEW_PCIB) && defined(PCI_RES_BUS)
  293 static int
  294 first_decoded_bus(struct acpi_hpcib_softc *sc, rman_res_t *startp)
  295 {
  296         struct resource_list_entry *rle;
  297 
  298         rle = resource_list_find(&sc->ap_host_res.hr_rl, PCI_RES_BUS, 0);
  299         if (rle == NULL)
  300                 return (ENXIO);
  301         *startp = rle->start;
  302         return (0);
  303 }
  304 #endif
  305 
  306 static int
  307 acpi_pcib_osc(struct acpi_hpcib_softc *sc, uint32_t osc_ctl)
  308 {
  309         ACPI_STATUS status;
  310         uint32_t cap_set[3];
  311 
  312         static uint8_t pci_host_bridge_uuid[ACPI_UUID_LENGTH] = {
  313                 0x5b, 0x4d, 0xdb, 0x33, 0xf7, 0x1f, 0x1c, 0x40,
  314                 0x96, 0x57, 0x74, 0x41, 0xc0, 0x3d, 0xd7, 0x66
  315         };
  316 
  317         /*
  318          * Don't invoke _OSC if a control is already granted.
  319          * However, always invoke _OSC during attach when 0 is passed.
  320          */
  321         if (osc_ctl != 0 && (sc->ap_osc_ctl & osc_ctl) == osc_ctl)
  322                 return (0);
  323 
  324         /* Support Field: Extended PCI Config Space, PCI Segment Groups, MSI */
  325         cap_set[PCI_OSC_SUPPORT] = PCIM_OSC_SUPPORT_EXT_PCI_CONF |
  326             PCIM_OSC_SUPPORT_SEG_GROUP | PCIM_OSC_SUPPORT_MSI;
  327         /* Active State Power Management, Clock Power Management Capability */
  328         if (pci_enable_aspm)
  329                 cap_set[PCI_OSC_SUPPORT] |= PCIM_OSC_SUPPORT_ASPM |
  330                     PCIM_OSC_SUPPORT_CPMC;
  331 
  332         /* Control Field */
  333         cap_set[PCI_OSC_CTL] = sc->ap_osc_ctl | osc_ctl;
  334 
  335         status = acpi_EvaluateOSC(sc->ap_handle, pci_host_bridge_uuid, 1,
  336             nitems(cap_set), cap_set, cap_set, false);
  337         if (ACPI_FAILURE(status)) {
  338                 if (status == AE_NOT_FOUND) {
  339                         sc->ap_osc_ctl |= osc_ctl;
  340                         return (0);
  341                 }
  342                 device_printf(sc->ap_dev, "_OSC failed: %s\n",
  343                     AcpiFormatException(status));
  344                 return (EIO);
  345         }
  346 
  347         /*
  348          * _OSC may return an error in the status word, but will
  349          * update the control mask always.  _OSC should not revoke
  350          * previously-granted controls.
  351          */
  352         if ((cap_set[PCI_OSC_CTL] & sc->ap_osc_ctl) != sc->ap_osc_ctl)
  353                 device_printf(sc->ap_dev, "_OSC revoked %#x\n",
  354                     (cap_set[PCI_OSC_CTL] & sc->ap_osc_ctl) ^ sc->ap_osc_ctl);
  355         sc->ap_osc_ctl = cap_set[PCI_OSC_CTL];
  356         if ((sc->ap_osc_ctl & osc_ctl) != osc_ctl)
  357                 return (EIO);
  358 
  359         return (0);
  360 }
  361 
  362 static int
  363 acpi_pcib_acpi_attach(device_t dev)
  364 {
  365     struct acpi_hpcib_softc     *sc;
  366     ACPI_STATUS                 status;
  367     static int bus0_seen = 0;
  368     u_int slot, func, busok;
  369 #if defined(NEW_PCIB) && defined(PCI_RES_BUS)
  370     struct resource *bus_res;
  371     rman_res_t start;
  372     int rid;
  373 #endif
  374     int error, domain;
  375     uint8_t busno;
  376 
  377     ACPI_FUNCTION_TRACE((char *)(uintptr_t)__func__);
  378 
  379     sc = device_get_softc(dev);
  380     sc->ap_dev = dev;
  381     sc->ap_handle = acpi_get_handle(dev);
  382 
  383     /*
  384      * Don't attach if we're not really there.
  385      */
  386     if (!acpi_DeviceIsPresent(dev))
  387         return (ENXIO);
  388 
  389     acpi_pcib_osc(sc, 0);
  390 
  391     /*
  392      * Get our segment number by evaluating _SEG.
  393      * It's OK for this to not exist.
  394      */
  395     status = acpi_GetInteger(sc->ap_handle, "_SEG", &sc->ap_segment);
  396     if (ACPI_FAILURE(status)) {
  397         if (status != AE_NOT_FOUND) {
  398             device_printf(dev, "could not evaluate _SEG - %s\n",
  399                 AcpiFormatException(status));
  400             return_VALUE (ENXIO);
  401         }
  402         /* If it's not found, assume 0. */
  403         sc->ap_segment = 0;
  404     }
  405 
  406     /*
  407      * Get the address (device and function) of the associated
  408      * PCI-Host bridge device from _ADR.  Assume we don't have one if
  409      * it doesn't exist.
  410      */
  411     status = acpi_GetInteger(sc->ap_handle, "_ADR", &sc->ap_addr);
  412     if (ACPI_FAILURE(status)) {
  413         device_printf(dev, "could not evaluate _ADR - %s\n",
  414             AcpiFormatException(status));
  415         sc->ap_addr = -1;
  416     }
  417 
  418 #ifdef NEW_PCIB
  419     /*
  420      * Determine which address ranges this bridge decodes and setup
  421      * resource managers for those ranges.
  422      */
  423     if (pcib_host_res_init(sc->ap_dev, &sc->ap_host_res) != 0)
  424             panic("failed to init hostb resources");
  425     if (!acpi_disabled("hostres")) {
  426         status = AcpiWalkResources(sc->ap_handle, "_CRS",
  427             acpi_pcib_producer_handler, sc);
  428         if (ACPI_FAILURE(status) && status != AE_NOT_FOUND)
  429             device_printf(sc->ap_dev, "failed to parse resources: %s\n",
  430                 AcpiFormatException(status));
  431     }
  432 #endif
  433 
  434     /*
  435      * Get our base bus number by evaluating _BBN.
  436      * If this doesn't work, we assume we're bus number 0.
  437      *
  438      * XXX note that it may also not exist in the case where we are
  439      *     meant to use a private configuration space mechanism for this bus,
  440      *     so we should dig out our resources and check to see if we have
  441      *     anything like that.  How do we do this?
  442      * XXX If we have the requisite information, and if we don't think the
  443      *     default PCI configuration space handlers can deal with this bus,
  444      *     we should attach our own handler.
  445      * XXX invoke _REG on this for the PCI config space address space?
  446      * XXX It seems many BIOS's with multiple Host-PCI bridges do not set
  447      *     _BBN correctly.  They set _BBN to zero for all bridges.  Thus,
  448      *     if _BBN is zero and PCI bus 0 already exists, we try to read our
  449      *     bus number from the configuration registers at address _ADR.
  450      *     We only do this for domain/segment 0 in the hopes that this is
  451      *     only needed for old single-domain machines.
  452      */
  453     status = acpi_GetInteger(sc->ap_handle, "_BBN", &sc->ap_bus);
  454     if (ACPI_FAILURE(status)) {
  455         if (status != AE_NOT_FOUND) {
  456             device_printf(dev, "could not evaluate _BBN - %s\n",
  457                 AcpiFormatException(status));
  458             return (ENXIO);
  459         } else {
  460             /* If it's not found, assume 0. */
  461             sc->ap_bus = 0;
  462         }
  463     }
  464 
  465     /*
  466      * If this is segment 0, the bus is zero, and PCI bus 0 already
  467      * exists, read the bus number via PCI config space.
  468      */
  469     busok = 1;
  470     if (sc->ap_segment == 0 && sc->ap_bus == 0 && bus0_seen) {
  471         busok = 0;
  472         if (sc->ap_addr != -1) {
  473             /* XXX: We assume bus 0. */
  474             slot = ACPI_ADR_PCI_SLOT(sc->ap_addr);
  475             func = ACPI_ADR_PCI_FUNC(sc->ap_addr);
  476             if (bootverbose)
  477                 device_printf(dev, "reading config registers from 0:%d:%d\n",
  478                     slot, func);
  479             if (host_pcib_get_busno(pci_cfgregread, 0, slot, func, &busno) == 0)
  480                 device_printf(dev, "couldn't read bus number from cfg space\n");
  481             else {
  482                 sc->ap_bus = busno;
  483                 busok = 1;
  484             }
  485         }
  486     }
  487 
  488 #if defined(NEW_PCIB) && defined(PCI_RES_BUS)
  489     /*
  490      * If nothing else worked, hope that ACPI at least lays out the
  491      * Host-PCI bridges in order and that as a result the next free
  492      * bus number is our bus number.
  493      */
  494     if (busok == 0) {
  495             /*
  496              * If we have a region of bus numbers, use the first
  497              * number for our bus.
  498              */
  499             if (first_decoded_bus(sc, &start) == 0)
  500                     sc->ap_bus = start;
  501             else {
  502                     rid = 0;
  503                     bus_res = pci_domain_alloc_bus(sc->ap_segment, dev, &rid, 0,
  504                         PCI_BUSMAX, 1, 0);
  505                     if (bus_res == NULL) {
  506                             device_printf(dev,
  507                                 "could not allocate bus number\n");
  508                             pcib_host_res_free(dev, &sc->ap_host_res);
  509                             return (ENXIO);
  510                     }
  511                     sc->ap_bus = rman_get_start(bus_res);
  512                     pci_domain_release_bus(sc->ap_segment, dev, rid, bus_res);
  513             }
  514     } else {
  515             /*
  516              * Require the bus number from _BBN to match the start of any
  517              * decoded range.
  518              */
  519             if (first_decoded_bus(sc, &start) == 0 && sc->ap_bus != start) {
  520                     device_printf(dev,
  521                 "bus number %d does not match start of decoded range %ju\n",
  522                         sc->ap_bus, (uintmax_t)start);
  523                     pcib_host_res_free(dev, &sc->ap_host_res);
  524                     return (ENXIO);
  525             }
  526     }
  527 #else
  528     /*
  529      * If nothing else worked, hope that ACPI at least lays out the
  530      * host-PCI bridges in order and that as a result our unit number
  531      * is actually our bus number.  There are several reasons this
  532      * might not be true.
  533      */
  534     if (busok == 0) {
  535         sc->ap_bus = device_get_unit(dev);
  536         device_printf(dev, "trying bus number %d\n", sc->ap_bus);
  537     }
  538 #endif
  539 
  540     /* If this is bus 0 on segment 0, note that it has been seen already. */
  541     if (sc->ap_segment == 0 && sc->ap_bus == 0)
  542             bus0_seen = 1;
  543 
  544     acpi_pcib_fetch_prt(dev, &sc->ap_prt);
  545 
  546     error = bus_dma_tag_create(bus_get_dma_tag(dev), 1,
  547         0, BUS_SPACE_MAXADDR, BUS_SPACE_MAXADDR,
  548         NULL, NULL, BUS_SPACE_MAXSIZE, BUS_SPACE_UNRESTRICTED,
  549         BUS_SPACE_MAXSIZE, 0, NULL, NULL, &sc->ap_dma_tag);
  550     if (error != 0)
  551         goto errout;
  552     error = bus_get_domain(dev, &domain);
  553     if (error == 0)
  554         error = bus_dma_tag_set_domain(sc->ap_dma_tag, domain);
  555     /* Don't fail to attach if the domain can't be queried or set. */
  556     error = 0;
  557 
  558     bus_generic_probe(dev);
  559     if (device_add_child(dev, "pci", -1) == NULL) {
  560         bus_dma_tag_destroy(sc->ap_dma_tag);
  561         sc->ap_dma_tag = NULL;
  562         error = ENXIO;
  563         goto errout;
  564     }
  565     return (bus_generic_attach(dev));
  566 
  567 errout:
  568     device_printf(device_get_parent(dev), "couldn't attach pci bus\n");
  569 #if defined(NEW_PCIB) && defined(PCI_RES_BUS)
  570     pcib_host_res_free(dev, &sc->ap_host_res);
  571 #endif
  572     return (error);
  573 }
  574 
  575 /*
  576  * Support for standard PCI bridge ivars.
  577  */
  578 static int
  579 acpi_pcib_read_ivar(device_t dev, device_t child, int which, uintptr_t *result)
  580 {
  581     struct acpi_hpcib_softc     *sc = device_get_softc(dev);
  582 
  583     switch (which) {
  584     case PCIB_IVAR_DOMAIN:
  585         *result = sc->ap_segment;
  586         return (0);
  587     case PCIB_IVAR_BUS:
  588         *result = sc->ap_bus;
  589         return (0);
  590     case ACPI_IVAR_HANDLE:
  591         *result = (uintptr_t)sc->ap_handle;
  592         return (0);
  593     case ACPI_IVAR_FLAGS:
  594         *result = (uintptr_t)sc->ap_flags;
  595         return (0);
  596     }
  597     return (ENOENT);
  598 }
  599 
  600 static int
  601 acpi_pcib_write_ivar(device_t dev, device_t child, int which, uintptr_t value)
  602 {
  603     struct acpi_hpcib_softc     *sc = device_get_softc(dev);
  604 
  605     switch (which) {
  606     case PCIB_IVAR_DOMAIN:
  607         return (EINVAL);
  608     case PCIB_IVAR_BUS:
  609         sc->ap_bus = value;
  610         return (0);
  611     case ACPI_IVAR_HANDLE:
  612         sc->ap_handle = (ACPI_HANDLE)value;
  613         return (0);
  614     case ACPI_IVAR_FLAGS:
  615         sc->ap_flags = (int)value;
  616         return (0);
  617     }
  618     return (ENOENT);
  619 }
  620 
  621 static uint32_t
  622 acpi_pcib_read_config(device_t dev, u_int bus, u_int slot, u_int func,
  623     u_int reg, int bytes)
  624 {
  625     return (pci_cfgregread(bus, slot, func, reg, bytes));
  626 }
  627 
  628 static void
  629 acpi_pcib_write_config(device_t dev, u_int bus, u_int slot, u_int func,
  630     u_int reg, uint32_t data, int bytes)
  631 {
  632     pci_cfgregwrite(bus, slot, func, reg, data, bytes);
  633 }
  634 
  635 static int
  636 acpi_pcib_acpi_route_interrupt(device_t pcib, device_t dev, int pin)
  637 {
  638     struct acpi_hpcib_softc *sc = device_get_softc(pcib);
  639 
  640     return (acpi_pcib_route_interrupt(pcib, dev, pin, &sc->ap_prt));
  641 }
  642 
  643 static int
  644 acpi_pcib_alloc_msi(device_t pcib, device_t dev, int count, int maxcount,
  645     int *irqs)
  646 {
  647         device_t bus;
  648 
  649         bus = device_get_parent(pcib);
  650         return (PCIB_ALLOC_MSI(device_get_parent(bus), dev, count, maxcount,
  651             irqs));
  652 }
  653 
  654 static int
  655 acpi_pcib_alloc_msix(device_t pcib, device_t dev, int *irq)
  656 {
  657         device_t bus;
  658 
  659         bus = device_get_parent(pcib);
  660         return (PCIB_ALLOC_MSIX(device_get_parent(bus), dev, irq));
  661 }
  662 
  663 static int
  664 acpi_pcib_map_msi(device_t pcib, device_t dev, int irq, uint64_t *addr,
  665     uint32_t *data)
  666 {
  667         struct acpi_hpcib_softc *sc;
  668         device_t bus, hostb;
  669         int error;
  670 
  671         bus = device_get_parent(pcib);
  672         error = PCIB_MAP_MSI(device_get_parent(bus), dev, irq, addr, data);
  673         if (error)
  674                 return (error);
  675 
  676         sc = device_get_softc(pcib);
  677         if (sc->ap_addr == -1)
  678                 return (0);
  679         /* XXX: Assumes all bridges are on bus 0. */
  680         hostb = pci_find_dbsf(sc->ap_segment, 0, ACPI_ADR_PCI_SLOT(sc->ap_addr),
  681             ACPI_ADR_PCI_FUNC(sc->ap_addr));
  682         if (hostb != NULL)
  683                 pci_ht_map_msi(hostb, *addr);
  684         return (0);
  685 }
  686 
  687 struct resource *
  688 acpi_pcib_acpi_alloc_resource(device_t dev, device_t child, int type, int *rid,
  689     rman_res_t start, rman_res_t end, rman_res_t count, u_int flags)
  690 {
  691 #ifdef NEW_PCIB
  692     struct acpi_hpcib_softc *sc;
  693     struct resource *res;
  694 #endif
  695 
  696 #if defined(__i386__) || defined(__amd64__)
  697     start = hostb_alloc_start(type, start, end, count);
  698 #endif
  699 
  700 #ifdef NEW_PCIB
  701     sc = device_get_softc(dev);
  702 #ifdef PCI_RES_BUS
  703     if (type == PCI_RES_BUS)
  704         return (pci_domain_alloc_bus(sc->ap_segment, child, rid, start, end,
  705             count, flags));
  706 #endif
  707     res = pcib_host_res_alloc(&sc->ap_host_res, child, type, rid, start, end,
  708         count, flags);
  709 
  710     /*
  711      * XXX: If this is a request for a specific range, assume it is
  712      * correct and pass it up to the parent.  What we probably want to
  713      * do long-term is explicitly trust any firmware-configured
  714      * resources during the initial bus scan on boot and then disable
  715      * this after that.
  716      */
  717     if (res == NULL && start + count - 1 == end)
  718         res = bus_generic_alloc_resource(dev, child, type, rid, start, end,
  719             count, flags);
  720     return (res);
  721 #else
  722     return (bus_generic_alloc_resource(dev, child, type, rid, start, end,
  723         count, flags));
  724 #endif
  725 }
  726 
  727 #ifdef NEW_PCIB
  728 int
  729 acpi_pcib_acpi_adjust_resource(device_t dev, device_t child, int type,
  730     struct resource *r, rman_res_t start, rman_res_t end)
  731 {
  732         struct acpi_hpcib_softc *sc;
  733 
  734         sc = device_get_softc(dev);
  735 #ifdef PCI_RES_BUS
  736         if (type == PCI_RES_BUS)
  737                 return (pci_domain_adjust_bus(sc->ap_segment, child, r, start,
  738                     end));
  739 #endif
  740         return (pcib_host_res_adjust(&sc->ap_host_res, child, type, r, start,
  741             end));
  742 }
  743 
  744 #ifdef PCI_RES_BUS
  745 int
  746 acpi_pcib_acpi_release_resource(device_t dev, device_t child, int type, int rid,
  747     struct resource *r)
  748 {
  749         struct acpi_hpcib_softc *sc;
  750 
  751         sc = device_get_softc(dev);
  752         if (type == PCI_RES_BUS)
  753                 return (pci_domain_release_bus(sc->ap_segment, child, rid, r));
  754         return (bus_generic_release_resource(dev, child, type, rid, r));
  755 }
  756 #endif
  757 #endif
  758 
  759 static int
  760 acpi_pcib_request_feature(device_t pcib, device_t dev, enum pci_feature feature)
  761 {
  762         uint32_t osc_ctl;
  763         struct acpi_hpcib_softc *sc;
  764 
  765         sc = device_get_softc(pcib);
  766 
  767         switch (feature) {
  768         case PCI_FEATURE_HP:
  769                 osc_ctl = PCIM_OSC_CTL_PCIE_HP;
  770                 break;
  771         case PCI_FEATURE_AER:
  772                 osc_ctl = PCIM_OSC_CTL_PCIE_AER;
  773                 break;
  774         default:
  775                 return (EINVAL);
  776         }
  777 
  778         return (acpi_pcib_osc(sc, osc_ctl));
  779 }
  780 
  781 static bus_dma_tag_t
  782 acpi_pcib_get_dma_tag(device_t bus, device_t child)
  783 {
  784         struct acpi_hpcib_softc *sc;
  785 
  786         sc = device_get_softc(bus);
  787 
  788         return (sc->ap_dma_tag);
  789 }

Cache object: aae7bdb8ca4fb3e5e25711b8702934c1


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