The Design and Implementation of the FreeBSD Operating System, Second Edition
Now available: The Design and Implementation of the FreeBSD Operating System (Second Edition)


[ source navigation ] [ diff markup ] [ identifier search ] [ freetext search ] [ file search ] [ list types ] [ track identifier ]

FreeBSD/Linux Kernel Cross Reference
sys/amd64/amd64/nexus.c

Version: -  FREEBSD  -  FREEBSD-12-STABLE  -  FREEBSD-12-0  -  FREEBSD-11-STABLE  -  FREEBSD-11-2  -  FREEBSD-11-1  -  FREEBSD-11-0  -  FREEBSD-10-STABLE  -  FREEBSD-10-4  -  FREEBSD-10-3  -  FREEBSD-10-2  -  FREEBSD-10-1  -  FREEBSD-10-0  -  FREEBSD-9-STABLE  -  FREEBSD-9-3  -  FREEBSD-9-2  -  FREEBSD-9-1  -  FREEBSD-9-0  -  FREEBSD-8-STABLE  -  FREEBSD-8-4  -  FREEBSD-8-3  -  FREEBSD-8-2  -  FREEBSD-8-1  -  FREEBSD-8-0  -  FREEBSD-7-STABLE  -  FREEBSD-7-4  -  FREEBSD-7-3  -  FREEBSD-7-2  -  FREEBSD-7-1  -  FREEBSD-7-0  -  FREEBSD-6-STABLE  -  FREEBSD-6-4  -  FREEBSD-6-3  -  FREEBSD-6-2  -  FREEBSD-6-1  -  FREEBSD-6-0  -  FREEBSD-5-STABLE  -  FREEBSD-5-5  -  FREEBSD-5-4  -  FREEBSD-5-3  -  FREEBSD-5-2  -  FREEBSD-5-1  -  FREEBSD-5-0  -  FREEBSD-4-STABLE  -  FREEBSD-3-STABLE  -  FREEBSD22  -  linux-2.6  -  linux-2.4.22  -  MK83  -  MK84  -  PLAN9  -  DFBSD  -  NETBSD  -  NETBSD5  -  NETBSD4  -  NETBSD3  -  NETBSD20  -  OPENBSD  -  xnu-517  -  xnu-792  -  xnu-792.6.70  -  xnu-1228  -  xnu-1456.1.26  -  xnu-1699.24.8  -  xnu-2050.18.24  -  OPENSOLARIS  -  minix-3-1-1 
SearchContext: -  none  -  3  -  10 

    1 /*-
    2  * Copyright 1998 Massachusetts Institute of Technology
    3  *
    4  * Permission to use, copy, modify, and distribute this software and
    5  * its documentation for any purpose and without fee is hereby
    6  * granted, provided that both the above copyright notice and this
    7  * permission notice appear in all copies, that both the above
    8  * copyright notice and this permission notice appear in all
    9  * supporting documentation, and that the name of M.I.T. not be used
   10  * in advertising or publicity pertaining to distribution of the
   11  * software without specific, written prior permission.  M.I.T. makes
   12  * no representations about the suitability of this software for any
   13  * purpose.  It is provided "as is" without express or implied
   14  * warranty.
   15  * 
   16  * THIS SOFTWARE IS PROVIDED BY M.I.T. ``AS IS''.  M.I.T. DISCLAIMS
   17  * ALL EXPRESS OR IMPLIED WARRANTIES WITH REGARD TO THIS SOFTWARE,
   18  * INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF
   19  * MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE. IN NO EVENT
   20  * SHALL M.I.T. BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
   21  * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
   22  * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF
   23  * USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND
   24  * ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
   25  * OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT
   26  * OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
   27  * SUCH DAMAGE.
   28  */
   29 
   30 #include <sys/cdefs.h>
   31 __FBSDID("$FreeBSD$");
   32 
   33 /*
   34  * This code implements a `root nexus' for Intel Architecture
   35  * machines.  The function of the root nexus is to serve as an
   36  * attachment point for both processors and buses, and to manage
   37  * resources which are common to all of them.  In particular,
   38  * this code implements the core resource managers for interrupt
   39  * requests, DMA requests (which rightfully should be a part of the
   40  * ISA code but it's easier to do it here for now), I/O port addresses,
   41  * and I/O memory address space.
   42  */
   43 
   44 #define __RMAN_RESOURCE_VISIBLE
   45 #include "opt_isa.h"
   46 
   47 #include <sys/param.h>
   48 #include <sys/systm.h>
   49 #include <sys/bus.h>
   50 #include <sys/kernel.h>
   51 #include <sys/malloc.h>
   52 #include <sys/module.h>
   53 #include <machine/bus.h>
   54 #include <machine/intr_machdep.h>
   55 #include <sys/rman.h>
   56 #include <sys/interrupt.h>
   57 
   58 #include <machine/vmparam.h>
   59 #include <vm/vm.h>
   60 #include <vm/pmap.h>
   61 #include <machine/pmap.h>
   62 
   63 #include <machine/resource.h>
   64 
   65 #include "pcib_if.h"
   66 
   67 #ifdef DEV_ISA
   68 #include <isa/isavar.h>
   69 #include <amd64/isa/isa.h>
   70 #endif
   71 #include <sys/rtprio.h>
   72 
   73 static MALLOC_DEFINE(M_NEXUSDEV, "nexusdev", "Nexus device");
   74 struct nexus_device {
   75         struct resource_list    nx_resources;
   76 };
   77 
   78 #define DEVTONX(dev)    ((struct nexus_device *)device_get_ivars(dev))
   79 
   80 static struct rman irq_rman, drq_rman, port_rman, mem_rman;
   81 
   82 static  int nexus_probe(device_t);
   83 static  int nexus_attach(device_t);
   84 static  int nexus_print_all_resources(device_t dev);
   85 static  int nexus_print_child(device_t, device_t);
   86 static device_t nexus_add_child(device_t bus, int order, const char *name,
   87                                 int unit);
   88 static  struct resource *nexus_alloc_resource(device_t, device_t, int, int *,
   89                                               u_long, u_long, u_long, u_int);
   90 static  int nexus_config_intr(device_t, int, enum intr_trigger,
   91                               enum intr_polarity);
   92 static  int nexus_activate_resource(device_t, device_t, int, int,
   93                                     struct resource *);
   94 static  int nexus_deactivate_resource(device_t, device_t, int, int,
   95                                       struct resource *);
   96 static  int nexus_release_resource(device_t, device_t, int, int,
   97                                    struct resource *);
   98 static  int nexus_setup_intr(device_t, device_t, struct resource *, int flags,
   99                              void (*)(void *), void *, void **);
  100 static  int nexus_teardown_intr(device_t, device_t, struct resource *,
  101                                 void *);
  102 static struct resource_list *nexus_get_reslist(device_t dev, device_t child);
  103 static  int nexus_set_resource(device_t, device_t, int, int, u_long, u_long);
  104 static  int nexus_get_resource(device_t, device_t, int, int, u_long *, u_long *);
  105 static void nexus_delete_resource(device_t, device_t, int, int);
  106 static  int nexus_alloc_msi(device_t pcib, device_t dev, int count, int maxcount, int *irqs);
  107 static  int nexus_release_msi(device_t pcib, device_t dev, int count, int *irqs);
  108 static  int nexus_alloc_msix(device_t pcib, device_t dev, int *irq);
  109 static  int nexus_release_msix(device_t pcib, device_t dev, int irq);
  110 static  int nexus_map_msi(device_t pcib, device_t dev, int irq, uint64_t *addr, uint32_t *data);
  111 
  112 static device_method_t nexus_methods[] = {
  113         /* Device interface */
  114         DEVMETHOD(device_probe,         nexus_probe),
  115         DEVMETHOD(device_attach,        nexus_attach),
  116         DEVMETHOD(device_detach,        bus_generic_detach),
  117         DEVMETHOD(device_shutdown,      bus_generic_shutdown),
  118         DEVMETHOD(device_suspend,       bus_generic_suspend),
  119         DEVMETHOD(device_resume,        bus_generic_resume),
  120 
  121         /* Bus interface */
  122         DEVMETHOD(bus_print_child,      nexus_print_child),
  123         DEVMETHOD(bus_add_child,        nexus_add_child),
  124         DEVMETHOD(bus_alloc_resource,   nexus_alloc_resource),
  125         DEVMETHOD(bus_release_resource, nexus_release_resource),
  126         DEVMETHOD(bus_activate_resource, nexus_activate_resource),
  127         DEVMETHOD(bus_deactivate_resource, nexus_deactivate_resource),
  128         DEVMETHOD(bus_setup_intr,       nexus_setup_intr),
  129         DEVMETHOD(bus_teardown_intr,    nexus_teardown_intr),
  130         DEVMETHOD(bus_config_intr,      nexus_config_intr),
  131         DEVMETHOD(bus_get_resource_list, nexus_get_reslist),
  132         DEVMETHOD(bus_set_resource,     nexus_set_resource),
  133         DEVMETHOD(bus_get_resource,     nexus_get_resource),
  134         DEVMETHOD(bus_delete_resource,  nexus_delete_resource),
  135 
  136         /* pcib interface */
  137         DEVMETHOD(pcib_alloc_msi,       nexus_alloc_msi),
  138         DEVMETHOD(pcib_release_msi,     nexus_release_msi),
  139         DEVMETHOD(pcib_alloc_msix,      nexus_alloc_msix),
  140         DEVMETHOD(pcib_release_msix,    nexus_release_msix),
  141         DEVMETHOD(pcib_map_msi,         nexus_map_msi),
  142 
  143         { 0, 0 }
  144 };
  145 
  146 static driver_t nexus_driver = {
  147         "nexus",
  148         nexus_methods,
  149         1,                      /* no softc */
  150 };
  151 static devclass_t nexus_devclass;
  152 
  153 DRIVER_MODULE(nexus, root, nexus_driver, nexus_devclass, 0, 0);
  154 
  155 static int
  156 nexus_probe(device_t dev)
  157 {
  158         int irq;
  159 
  160         device_quiet(dev);      /* suppress attach message for neatness */
  161 
  162         /* 
  163          * XXX working notes:
  164          *
  165          * - IRQ resource creation should be moved to the PIC/APIC driver.
  166          * - DRQ resource creation should be moved to the DMAC driver.
  167          * - The above should be sorted to probe earlier than any child busses.
  168          *
  169          * - Leave I/O and memory creation here, as child probes may need them.
  170          *   (especially eg. ACPI)
  171          */
  172 
  173         /*
  174          * IRQ's are on the mainboard on old systems, but on the ISA part
  175          * of PCI->ISA bridges.  There would be multiple sets of IRQs on
  176          * multi-ISA-bus systems.  PCI interrupts are routed to the ISA
  177          * component, so in a way, PCI can be a partial child of an ISA bus(!).
  178          * APIC interrupts are global though.
  179          */
  180         irq_rman.rm_start = 0;
  181         irq_rman.rm_type = RMAN_ARRAY;
  182         irq_rman.rm_descr = "Interrupt request lines";
  183         irq_rman.rm_end = NUM_IO_INTS - 1;
  184         if (rman_init(&irq_rman))
  185                 panic("nexus_probe irq_rman");
  186 
  187         /*
  188          * We search for regions of existing IRQs and add those to the IRQ
  189          * resource manager.
  190          */
  191         for (irq = 0; irq < NUM_IO_INTS; irq++)
  192                 if (intr_lookup_source(irq) != NULL)
  193                         if (rman_manage_region(&irq_rman, irq, irq) != 0)
  194                                 panic("nexus_probe irq_rman add");
  195 
  196         /*
  197          * ISA DMA on PCI systems is implemented in the ISA part of each
  198          * PCI->ISA bridge and the channels can be duplicated if there are
  199          * multiple bridges.  (eg: laptops with docking stations)
  200          */
  201         drq_rman.rm_start = 0;
  202         drq_rman.rm_end = 7;
  203         drq_rman.rm_type = RMAN_ARRAY;
  204         drq_rman.rm_descr = "DMA request lines";
  205         /* XXX drq 0 not available on some machines */
  206         if (rman_init(&drq_rman)
  207             || rman_manage_region(&drq_rman,
  208                                   drq_rman.rm_start, drq_rman.rm_end))
  209                 panic("nexus_probe drq_rman");
  210 
  211         /*
  212          * However, IO ports and Memory truely are global at this level,
  213          * as are APIC interrupts (however many IO APICS there turn out
  214          * to be on large systems..)
  215          */
  216         port_rman.rm_start = 0;
  217         port_rman.rm_end = 0xffff;
  218         port_rman.rm_type = RMAN_ARRAY;
  219         port_rman.rm_descr = "I/O ports";
  220         if (rman_init(&port_rman)
  221             || rman_manage_region(&port_rman, 0, 0xffff))
  222                 panic("nexus_probe port_rman");
  223 
  224         mem_rman.rm_start = 0;
  225         mem_rman.rm_end = ~0u;
  226         mem_rman.rm_type = RMAN_ARRAY;
  227         mem_rman.rm_descr = "I/O memory addresses";
  228         if (rman_init(&mem_rman)
  229             || rman_manage_region(&mem_rman, 0, ~0))
  230                 panic("nexus_probe mem_rman");
  231 
  232         return 0;
  233 }
  234 
  235 static int
  236 nexus_attach(device_t dev)
  237 {
  238 
  239         bus_generic_probe(dev);
  240         bus_generic_attach(dev);
  241         return 0;
  242 }
  243 
  244 static int
  245 nexus_print_all_resources(device_t dev)
  246 {
  247         struct  nexus_device *ndev = DEVTONX(dev);
  248         struct resource_list *rl = &ndev->nx_resources;
  249         int retval = 0;
  250 
  251         if (STAILQ_FIRST(rl))
  252                 retval += printf(" at");
  253         
  254         retval += resource_list_print_type(rl, "port", SYS_RES_IOPORT, "%#lx");
  255         retval += resource_list_print_type(rl, "iomem", SYS_RES_MEMORY, "%#lx");
  256         retval += resource_list_print_type(rl, "irq", SYS_RES_IRQ, "%ld");
  257 
  258         return retval;
  259 }
  260 
  261 static int
  262 nexus_print_child(device_t bus, device_t child)
  263 {
  264         int retval = 0;
  265 
  266         retval += bus_print_child_header(bus, child);
  267         retval += nexus_print_all_resources(child);
  268         if (device_get_flags(child))
  269                 retval += printf(" flags %#x", device_get_flags(child));
  270         retval += printf(" on motherboard\n");  /* XXX "motherboard", ick */
  271 
  272         return (retval);
  273 }
  274 
  275 static device_t
  276 nexus_add_child(device_t bus, int order, const char *name, int unit)
  277 {
  278         device_t                child;
  279         struct nexus_device     *ndev;
  280 
  281         ndev = malloc(sizeof(struct nexus_device), M_NEXUSDEV, M_NOWAIT|M_ZERO);
  282         if (!ndev)
  283                 return(0);
  284         resource_list_init(&ndev->nx_resources);
  285 
  286         child = device_add_child_ordered(bus, order, name, unit); 
  287 
  288         /* should we free this in nexus_child_detached? */
  289         device_set_ivars(child, ndev);
  290 
  291         return(child);
  292 }
  293 
  294 /*
  295  * Allocate a resource on behalf of child.  NB: child is usually going to be a
  296  * child of one of our descendants, not a direct child of nexus0.
  297  */
  298 static struct resource *
  299 nexus_alloc_resource(device_t bus, device_t child, int type, int *rid,
  300                      u_long start, u_long end, u_long count, u_int flags)
  301 {
  302         struct nexus_device *ndev = DEVTONX(child);
  303         struct  resource *rv;
  304         struct resource_list_entry *rle;
  305         struct  rman *rm;
  306         int needactivate = flags & RF_ACTIVE;
  307 
  308         /*
  309          * If this is an allocation of the "default" range for a given RID, and
  310          * we know what the resources for this device are (ie. they aren't maintained
  311          * by a child bus), then work out the start/end values.
  312          */
  313         if ((start == 0UL) && (end == ~0UL) && (count == 1)) {
  314                 if (ndev == NULL)
  315                         return(NULL);
  316                 rle = resource_list_find(&ndev->nx_resources, type, *rid);
  317                 if (rle == NULL)
  318                         return(NULL);
  319                 start = rle->start;
  320                 end = rle->end;
  321                 count = rle->count;
  322         }
  323 
  324         flags &= ~RF_ACTIVE;
  325 
  326         switch (type) {
  327         case SYS_RES_IRQ:
  328                 rm = &irq_rman;
  329                 break;
  330 
  331         case SYS_RES_DRQ:
  332                 rm = &drq_rman;
  333                 break;
  334 
  335         case SYS_RES_IOPORT:
  336                 rm = &port_rman;
  337                 break;
  338 
  339         case SYS_RES_MEMORY:
  340                 rm = &mem_rman;
  341                 break;
  342 
  343         default:
  344                 return 0;
  345         }
  346 
  347         rv = rman_reserve_resource(rm, start, end, count, flags, child);
  348         if (rv == 0)
  349                 return 0;
  350         rman_set_rid(rv, *rid);
  351         if (type == SYS_RES_MEMORY) {
  352                 rman_set_bustag(rv, AMD64_BUS_SPACE_MEM);
  353         } else if (type == SYS_RES_IOPORT) {
  354                 rman_set_bustag(rv, AMD64_BUS_SPACE_IO);
  355                 rman_set_bushandle(rv, rman_get_start(rv));
  356         }
  357 
  358         if (needactivate) {
  359                 if (bus_activate_resource(child, type, *rid, rv)) {
  360                         rman_release_resource(rv);
  361                         return 0;
  362                 }
  363         }
  364         
  365         return rv;
  366 }
  367 
  368 static int
  369 nexus_activate_resource(device_t bus, device_t child, int type, int rid,
  370                         struct resource *r)
  371 {
  372 
  373         /*
  374          * If this is a memory resource, map it into the kernel.
  375          */
  376         if (rman_get_bustag(r) == AMD64_BUS_SPACE_MEM) {
  377                 caddr_t vaddr = 0;
  378 
  379                 if (rman_get_end(r) < 1024 * 1024) {
  380                         /*
  381                          * The first 1Mb is mapped at KERNBASE.
  382                          */
  383                         vaddr = (caddr_t)(uintptr_t)(KERNBASE + rman_get_start(r));
  384                 } else {
  385                         u_int64_t paddr;
  386                         u_int64_t psize;
  387                         u_int32_t poffs;
  388 
  389                         paddr = rman_get_start(r);
  390                         psize = rman_get_size(r);
  391 
  392                         poffs = paddr - trunc_page(paddr);
  393                         vaddr = (caddr_t) pmap_mapdev(paddr-poffs, psize+poffs) + poffs;
  394                 }
  395                 rman_set_virtual(r, vaddr);
  396                 rman_set_bushandle(r, (bus_space_handle_t) vaddr);
  397         }
  398         return (rman_activate_resource(r));
  399 }
  400 
  401 static int
  402 nexus_deactivate_resource(device_t bus, device_t child, int type, int rid,
  403                           struct resource *r)
  404 {
  405         /*
  406          * If this is a memory resource, unmap it.
  407          */
  408         if ((rman_get_bustag(r) == AMD64_BUS_SPACE_MEM) &&
  409             (rman_get_end(r) >= 1024 * 1024)) {
  410                 u_int32_t psize;
  411 
  412                 psize = rman_get_size(r);
  413                 pmap_unmapdev((vm_offset_t)rman_get_virtual(r), psize);
  414         }
  415                 
  416         return (rman_deactivate_resource(r));
  417 }
  418 
  419 static int
  420 nexus_release_resource(device_t bus, device_t child, int type, int rid,
  421                        struct resource *r)
  422 {
  423         if (rman_get_flags(r) & RF_ACTIVE) {
  424                 int error = bus_deactivate_resource(child, type, rid, r);
  425                 if (error)
  426                         return error;
  427         }
  428         return (rman_release_resource(r));
  429 }
  430 
  431 /*
  432  * Currently this uses the really grody interface from kern/kern_intr.c
  433  * (which really doesn't belong in kern/anything.c).  Eventually, all of
  434  * the code in kern_intr.c and machdep_intr.c should get moved here, since
  435  * this is going to be the official interface.
  436  */
  437 static int
  438 nexus_setup_intr(device_t bus, device_t child, struct resource *irq,
  439                  int flags, void (*ihand)(void *), void *arg, void **cookiep)
  440 {
  441         int             error;
  442 
  443         /* somebody tried to setup an irq that failed to allocate! */
  444         if (irq == NULL)
  445                 panic("nexus_setup_intr: NULL irq resource!");
  446 
  447         *cookiep = 0;
  448         if ((rman_get_flags(irq) & RF_SHAREABLE) == 0)
  449                 flags |= INTR_EXCL;
  450 
  451         /*
  452          * We depend here on rman_activate_resource() being idempotent.
  453          */
  454         error = rman_activate_resource(irq);
  455         if (error)
  456                 return (error);
  457 
  458         error = intr_add_handler(device_get_nameunit(child),
  459             rman_get_start(irq), ihand, arg, flags, cookiep);
  460 
  461         return (error);
  462 }
  463 
  464 static int
  465 nexus_teardown_intr(device_t dev, device_t child, struct resource *r, void *ih)
  466 {
  467         return (intr_remove_handler(ih));
  468 }
  469 
  470 static int
  471 nexus_config_intr(device_t dev, int irq, enum intr_trigger trig,
  472     enum intr_polarity pol)
  473 {
  474         return (intr_config_intr(irq, trig, pol));
  475 }
  476 
  477 static struct resource_list *
  478 nexus_get_reslist(device_t dev, device_t child)
  479 {
  480         struct nexus_device *ndev = DEVTONX(child);
  481 
  482         return (&ndev->nx_resources);
  483 }
  484 
  485 static int
  486 nexus_set_resource(device_t dev, device_t child, int type, int rid, u_long start, u_long count)
  487 {
  488         struct nexus_device     *ndev = DEVTONX(child);
  489         struct resource_list    *rl = &ndev->nx_resources;
  490 
  491         /* XXX this should return a success/failure indicator */
  492         resource_list_add(rl, type, rid, start, start + count - 1, count);
  493         return(0);
  494 }
  495 
  496 static int
  497 nexus_get_resource(device_t dev, device_t child, int type, int rid, u_long *startp, u_long *countp)
  498 {
  499         struct nexus_device     *ndev = DEVTONX(child);
  500         struct resource_list    *rl = &ndev->nx_resources;
  501         struct resource_list_entry *rle;
  502 
  503         rle = resource_list_find(rl, type, rid);
  504         if (!rle)
  505                 return(ENOENT);
  506         if (startp)
  507                 *startp = rle->start;
  508         if (countp)
  509                 *countp = rle->count;
  510         return(0);
  511 }
  512 
  513 static void
  514 nexus_delete_resource(device_t dev, device_t child, int type, int rid)
  515 {
  516         struct nexus_device     *ndev = DEVTONX(child);
  517         struct resource_list    *rl = &ndev->nx_resources;
  518 
  519         resource_list_delete(rl, type, rid);
  520 }
  521 
  522 /* Called from the MSI code to add new IRQs to the IRQ rman. */
  523 void
  524 nexus_add_irq(u_long irq)
  525 {
  526 
  527         if (rman_manage_region(&irq_rman, irq, irq) != 0)
  528                 panic("%s: failed", __func__);
  529 }
  530 
  531 static int
  532 nexus_alloc_msix(device_t pcib, device_t dev, int *irq)
  533 {
  534 
  535         return (msix_alloc(dev, irq));
  536 }
  537 
  538 static int
  539 nexus_release_msix(device_t pcib, device_t dev, int irq)
  540 {
  541 
  542         return (msix_release(irq));
  543 }
  544 
  545 static int
  546 nexus_alloc_msi(device_t pcib, device_t dev, int count, int maxcount, int *irqs)
  547 {
  548 
  549         return (msi_alloc(dev, count, maxcount, irqs));
  550 }
  551 
  552 static int
  553 nexus_release_msi(device_t pcib, device_t dev, int count, int *irqs)
  554 {
  555 
  556         return (msi_release(irqs, count));
  557 }
  558 
  559 static int
  560 nexus_map_msi(device_t pcib, device_t dev, int irq, uint64_t *addr, uint32_t *data)
  561 {
  562 
  563         return (msi_map(irq, addr, data));
  564 }
  565 
  566 #ifdef DEV_ISA
  567 /*
  568  * Placeholder which claims PnP 'devices' which describe system 
  569  * resources.
  570  */
  571 static struct isa_pnp_id sysresource_ids[] = {
  572         { 0x010cd041 /* PNP0c01 */, "System Memory" },
  573         { 0x020cd041 /* PNP0c02 */, "System Resource" },
  574         { 0 }
  575 };
  576 
  577 static int
  578 sysresource_probe(device_t dev)
  579 {
  580         int     result;
  581         
  582         if ((result = ISA_PNP_PROBE(device_get_parent(dev), dev, sysresource_ids)) <= 0) {
  583                 device_quiet(dev);
  584         }
  585         return(result);
  586 }
  587 
  588 static int
  589 sysresource_attach(device_t dev)
  590 {
  591         return(0);
  592 }
  593 
  594 static device_method_t sysresource_methods[] = {
  595         /* Device interface */
  596         DEVMETHOD(device_probe,         sysresource_probe),
  597         DEVMETHOD(device_attach,        sysresource_attach),
  598         DEVMETHOD(device_detach,        bus_generic_detach),
  599         DEVMETHOD(device_shutdown,      bus_generic_shutdown),
  600         DEVMETHOD(device_suspend,       bus_generic_suspend),
  601         DEVMETHOD(device_resume,        bus_generic_resume),
  602         { 0, 0 }
  603 };
  604 
  605 static driver_t sysresource_driver = {
  606         "sysresource",
  607         sysresource_methods,
  608         1,              /* no softc */
  609 };
  610 
  611 static devclass_t sysresource_devclass;
  612 
  613 DRIVER_MODULE(sysresource, isa, sysresource_driver, sysresource_devclass, 0, 0);
  614 #endif /* DEV_ISA */

Cache object: 0cb5947f85d6fec04ad31a07f6e02a36


[ source navigation ] [ diff markup ] [ identifier search ] [ freetext search ] [ file search ] [ list types ] [ track identifier ]


This page is part of the FreeBSD/Linux Linux Kernel Cross-Reference, and was automatically generated using a modified version of the LXR engine.