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


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FreeBSD/Linux Kernel Cross Reference
sys/sparc64/sbus/dma_sbus.c

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    1 /*      $OpenBSD: dma_sbus.c,v 1.16 2008/06/26 05:42:18 ray Exp $       */
    2 /*      $NetBSD: dma_sbus.c,v 1.32 2008/04/28 20:23:57 martin Exp $ */
    3 
    4 /*-
    5  * Copyright (c) 1998 The NetBSD Foundation, Inc.
    6  * All rights reserved.
    7  *
    8  * This code is derived from software contributed to The NetBSD Foundation
    9  * by Paul Kranenburg.
   10  *
   11  * Redistribution and use in source and binary forms, with or without
   12  * modification, are permitted provided that the following conditions
   13  * are met:
   14  * 1. Redistributions of source code must retain the above copyright
   15  *    notice, this list of conditions and the following disclaimer.
   16  * 2. Redistributions in binary form must reproduce the above copyright
   17  *    notice, this list of conditions and the following disclaimer in the
   18  *    documentation and/or other materials provided with the distribution.
   19  *
   20  * THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS
   21  * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED
   22  * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
   23  * PURPOSE ARE DISCLAIMED.  IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS
   24  * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
   25  * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
   26  * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
   27  * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
   28  * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
   29  * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
   30  * POSSIBILITY OF SUCH DAMAGE.
   31  */
   32 
   33 /*-
   34  * Copyright (c) 1994 Peter Galbavy.  All rights reserved.
   35  * Copyright (c) 2005 Marius Strobl <marius@FreeBSD.org>. All rights reserved.
   36  *
   37  * Redistribution and use in source and binary forms, with or without
   38  * modification, are permitted provided that the following conditions
   39  * are met:
   40  * 1. Redistributions of source code must retain the above copyright
   41  *    notice, this list of conditions and the following disclaimer.
   42  * 2. Redistributions in binary form must reproduce the above copyright
   43  *    notice, this list of conditions and the following disclaimer in the
   44  *    documentation and/or other materials provided with the distribution.
   45  *
   46  * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
   47  * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
   48  * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
   49  * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
   50  * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
   51  * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
   52  * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
   53  * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
   54  * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
   55  * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
   56  */
   57 
   58 #include <sys/cdefs.h>
   59 __FBSDID("$FreeBSD: releng/10.4/sys/sparc64/sbus/dma_sbus.c 227848 2011-11-22 21:55:40Z marius $");
   60 
   61 #include <sys/param.h>
   62 #include <sys/systm.h>
   63 #include <sys/bus.h>
   64 #include <sys/kernel.h>
   65 #include <sys/module.h>
   66 #include <sys/rman.h>
   67 
   68 #include <dev/ofw/ofw_bus.h>
   69 #include <dev/ofw/ofw_bus_subr.h>
   70 #include <dev/ofw/openfirm.h>
   71 
   72 #include <machine/bus.h>
   73 #include <machine/bus_common.h>
   74 #include <machine/resource.h>
   75 
   76 #include <sparc64/sbus/lsi64854reg.h>
   77 #include <sparc64/sbus/lsi64854var.h>
   78 #include <sparc64/sbus/ofw_sbus.h>
   79 #include <sparc64/sbus/sbusreg.h>
   80 #include <sparc64/sbus/sbusvar.h>
   81 
   82 struct dma_devinfo {
   83         struct ofw_bus_devinfo  ddi_obdinfo;
   84         struct resource_list    ddi_rl;
   85 };
   86 
   87 struct dma_softc {
   88         struct lsi64854_softc   sc_lsi64854;    /* base device */
   89         int                     sc_ign;
   90         int                     sc_slot;
   91 };
   92 
   93 static devclass_t dma_devclass;
   94 
   95 static device_probe_t dma_probe;
   96 static device_attach_t dma_attach;
   97 static bus_print_child_t dma_print_child;
   98 static bus_probe_nomatch_t dma_probe_nomatch;
   99 static bus_get_resource_list_t dma_get_resource_list;
  100 static ofw_bus_get_devinfo_t dma_get_devinfo;
  101 
  102 static struct dma_devinfo *dma_setup_dinfo(device_t, struct dma_softc *,
  103     phandle_t);
  104 static void dma_destroy_dinfo(struct dma_devinfo *);
  105 static int dma_print_res(struct dma_devinfo *);
  106 
  107 static device_method_t dma_methods[] = {
  108         /* Device interface */
  109         DEVMETHOD(device_probe,         dma_probe),
  110         DEVMETHOD(device_attach,        dma_attach),
  111         DEVMETHOD(device_shutdown,      bus_generic_shutdown),
  112         DEVMETHOD(device_suspend,       bus_generic_suspend),
  113         DEVMETHOD(device_resume,        bus_generic_resume),
  114 
  115         /* Bus interface */
  116         DEVMETHOD(bus_print_child,      dma_print_child),
  117         DEVMETHOD(bus_probe_nomatch,    dma_probe_nomatch),
  118         DEVMETHOD(bus_alloc_resource,   bus_generic_rl_alloc_resource),
  119         DEVMETHOD(bus_activate_resource, bus_generic_activate_resource),
  120         DEVMETHOD(bus_deactivate_resource, bus_generic_deactivate_resource),
  121         DEVMETHOD(bus_adjust_resource,  bus_generic_adjust_resource),
  122         DEVMETHOD(bus_release_resource, bus_generic_rl_release_resource),
  123         DEVMETHOD(bus_setup_intr,       bus_generic_setup_intr),
  124         DEVMETHOD(bus_teardown_intr,    bus_generic_teardown_intr),
  125         DEVMETHOD(bus_get_resource,     bus_generic_rl_get_resource),
  126         DEVMETHOD(bus_get_resource_list, dma_get_resource_list),
  127         DEVMETHOD(bus_child_pnpinfo_str, ofw_bus_gen_child_pnpinfo_str),
  128 
  129         /* ofw_bus interface */
  130         DEVMETHOD(ofw_bus_get_devinfo,  dma_get_devinfo),
  131         DEVMETHOD(ofw_bus_get_compat,   ofw_bus_gen_get_compat),
  132         DEVMETHOD(ofw_bus_get_model,    ofw_bus_gen_get_model),
  133         DEVMETHOD(ofw_bus_get_name,     ofw_bus_gen_get_name),
  134         DEVMETHOD(ofw_bus_get_node,     ofw_bus_gen_get_node),
  135         DEVMETHOD(ofw_bus_get_type,     ofw_bus_gen_get_type),
  136 
  137         DEVMETHOD_END
  138 };
  139 
  140 static driver_t dma_driver = {
  141         "dma",
  142         dma_methods,
  143         sizeof(struct dma_softc),
  144 };
  145 
  146 /*
  147  * The probe order is handled by sbus(4) as we don't want the variants
  148  * with children to be attached earlier than the stand-alone controllers
  149  * in order to generally preserve the OFW device tree order.
  150  */
  151 EARLY_DRIVER_MODULE(dma, sbus, dma_driver, dma_devclass, 0, 0,
  152     BUS_PASS_DEFAULT);
  153 MODULE_DEPEND(dma, sbus, 1, 1, 1);
  154 MODULE_VERSION(dma, 1);
  155 
  156 static int
  157 dma_probe(device_t dev)
  158 {
  159         const char *name;
  160 
  161         name = ofw_bus_get_name(dev);
  162         if (strcmp(name, "espdma") == 0 || strcmp(name, "dma") == 0 ||
  163             strcmp(name, "ledma") == 0) {
  164                 device_set_desc_copy(dev, name);
  165                 return (0);
  166         }
  167         return (ENXIO);
  168 }
  169 
  170 static int
  171 dma_attach(device_t dev)
  172 {
  173         struct dma_softc *dsc;
  174         struct lsi64854_softc *lsc;
  175         struct dma_devinfo *ddi;
  176         device_t cdev;
  177         const char *name;
  178         char *cabletype;
  179         uint32_t csr;
  180         phandle_t child, node;
  181         int error, i;
  182 
  183         dsc = device_get_softc(dev);
  184         lsc = &dsc->sc_lsi64854;
  185 
  186         name = ofw_bus_get_name(dev);
  187         node = ofw_bus_get_node(dev);
  188         dsc->sc_ign = sbus_get_ign(dev);
  189         dsc->sc_slot = sbus_get_slot(dev);
  190 
  191         i = 0;
  192         lsc->sc_res = bus_alloc_resource_any(dev, SYS_RES_MEMORY, &i,
  193             RF_ACTIVE);
  194         if (lsc->sc_res == NULL) {
  195                 device_printf(dev, "cannot allocate resources\n");
  196                 return (ENXIO);
  197         }
  198 
  199         if (strcmp(name, "espdma") == 0 || strcmp(name, "dma") == 0)
  200                 lsc->sc_channel = L64854_CHANNEL_SCSI;
  201         else if (strcmp(name, "ledma") == 0) {
  202                 /*
  203                  * Check to see which cable type is currently active and
  204                  * set the appropriate bit in the ledma csr so that it
  205                  * gets used. If we didn't netboot, the PROM won't have
  206                  * the "cable-selection" property; default to TP and then
  207                  * the user can change it via a "media" option to ifconfig.
  208                  */
  209                 csr = L64854_GCSR(lsc);
  210                 if ((OF_getprop_alloc(node, "cable-selection", 1,
  211                     (void **)&cabletype)) == -1) {
  212                         /* assume TP if nothing there */
  213                         csr |= E_TP_AUI;
  214                 } else {
  215                         if (strcmp(cabletype, "aui") == 0)
  216                                 csr &= ~E_TP_AUI;
  217                         else
  218                                 csr |= E_TP_AUI;
  219                         free(cabletype, M_OFWPROP);
  220                 }
  221                 L64854_SCSR(lsc, csr);
  222                 DELAY(20000);   /* manual says we need a 20ms delay */
  223                 lsc->sc_channel = L64854_CHANNEL_ENET;
  224         } else {
  225                 device_printf(dev, "unsupported DMA channel\n");
  226                 error = ENXIO;
  227                 goto fail_lres;
  228         }
  229 
  230         error = bus_dma_tag_create(
  231             bus_get_dma_tag(dev),       /* parent */
  232             1, 0,                       /* alignment, boundary */
  233             BUS_SPACE_MAXADDR,          /* lowaddr */
  234             BUS_SPACE_MAXADDR,          /* highaddr */
  235             NULL, NULL,                 /* filter, filterarg */
  236             BUS_SPACE_MAXSIZE,          /* maxsize */
  237             BUS_SPACE_UNRESTRICTED,     /* nsegments */
  238             BUS_SPACE_MAXSIZE,          /* maxsegsize */
  239             0,                          /* flags */
  240             NULL, NULL,                 /* no locking */
  241             &lsc->sc_parent_dmat);
  242         if (error != 0) {
  243                 device_printf(dev, "cannot allocate parent DMA tag\n");
  244                 goto fail_lres;
  245         }
  246 
  247         i = sbus_get_burstsz(dev);
  248         lsc->sc_burst = (i & SBUS_BURST_32) ? 32 :
  249             (i & SBUS_BURST_16) ? 16 : 0;
  250         lsc->sc_dev = dev;
  251 
  252         /* Attach children. */
  253         i = 0;
  254         for (child = OF_child(node); child != 0; child = OF_peer(child)) {
  255                 if ((ddi = dma_setup_dinfo(dev, dsc, child)) == NULL)
  256                         continue;
  257                 if (i != 0) {
  258                         device_printf(dev,
  259                             "<%s>: only one child per DMA channel supported\n",
  260                             ddi->ddi_obdinfo.obd_name);
  261                         dma_destroy_dinfo(ddi);
  262                         continue;
  263                 }
  264                 if ((cdev = device_add_child(dev, NULL, -1)) == NULL) {
  265                         device_printf(dev, "<%s>: device_add_child failed\n",
  266                             ddi->ddi_obdinfo.obd_name);
  267                         dma_destroy_dinfo(ddi);
  268                         continue;
  269                 }
  270                 device_set_ivars(cdev, ddi);
  271                 i++;
  272         }
  273         return (bus_generic_attach(dev));
  274 
  275  fail_lres:
  276         bus_release_resource(dev, SYS_RES_MEMORY, rman_get_rid(lsc->sc_res),
  277             lsc->sc_res);
  278         return (error);
  279 }
  280 
  281 static struct dma_devinfo *
  282 dma_setup_dinfo(device_t dev, struct dma_softc *dsc, phandle_t node)
  283 {
  284         struct dma_devinfo *ddi;
  285         struct sbus_regs *reg;
  286         uint32_t base, iv, *intr;
  287         int i, nreg, nintr, slot, rslot;
  288 
  289         ddi = malloc(sizeof(*ddi), M_DEVBUF, M_WAITOK | M_ZERO);
  290         if (ofw_bus_gen_setup_devinfo(&ddi->ddi_obdinfo, node) != 0) {
  291                 free(ddi, M_DEVBUF);
  292                 return (NULL);
  293         }
  294         resource_list_init(&ddi->ddi_rl);
  295         slot = -1;
  296         nreg = OF_getprop_alloc(node, "reg", sizeof(*reg), (void **)&reg);
  297         if (nreg == -1) {
  298                 device_printf(dev, "<%s>: incomplete\n",
  299                     ddi->ddi_obdinfo.obd_name);
  300                 goto fail;
  301         }
  302         for (i = 0; i < nreg; i++) {
  303                 base = reg[i].sbr_offset;
  304                 if (SBUS_ABS(base)) {
  305                         rslot = SBUS_ABS_TO_SLOT(base);
  306                         base = SBUS_ABS_TO_OFFSET(base);
  307                 } else
  308                         rslot = reg[i].sbr_slot;
  309                 if (slot != -1 && slot != rslot) {
  310                         device_printf(dev, "<%s>: multiple slots\n",
  311                             ddi->ddi_obdinfo.obd_name);
  312                         free(reg, M_OFWPROP);
  313                         goto fail;
  314                 }
  315                 slot = rslot;
  316 
  317                 resource_list_add(&ddi->ddi_rl, SYS_RES_MEMORY, i, base,
  318                     base + reg[i].sbr_size, reg[i].sbr_size);
  319         }
  320         free(reg, M_OFWPROP);
  321         if (slot != dsc->sc_slot) {
  322                 device_printf(dev, "<%s>: parent and child slot do not match\n",
  323                     ddi->ddi_obdinfo.obd_name);
  324                 goto fail;
  325         }
  326 
  327         /*
  328          * The `interrupts' property contains the SBus interrupt level.
  329          */
  330         nintr = OF_getprop_alloc(node, "interrupts", sizeof(*intr),
  331             (void **)&intr);
  332         if (nintr != -1) {
  333                 for (i = 0; i < nintr; i++) {
  334                         iv = intr[i];
  335                         /*
  336                          * SBus card devices need the slot number encoded into
  337                          * the vector as this is generally not done.
  338                          */
  339                         if ((iv & INTMAP_OBIO_MASK) == 0)
  340                                 iv |= slot << 3;
  341                         /* Set the IGN as appropriate. */
  342                         iv |= dsc->sc_ign << INTMAP_IGN_SHIFT;
  343                         resource_list_add(&ddi->ddi_rl, SYS_RES_IRQ, i,
  344                             iv, iv, 1);
  345                 }
  346                 free(intr, M_OFWPROP);
  347         }
  348         return (ddi);
  349 
  350  fail:
  351         dma_destroy_dinfo(ddi);
  352         return (NULL);
  353 }
  354 
  355 static void
  356 dma_destroy_dinfo(struct dma_devinfo *dinfo)
  357 {
  358 
  359         resource_list_free(&dinfo->ddi_rl);
  360         ofw_bus_gen_destroy_devinfo(&dinfo->ddi_obdinfo);
  361         free(dinfo, M_DEVBUF);
  362 }
  363 
  364 static int
  365 dma_print_child(device_t dev, device_t child)
  366 {
  367         int rv;
  368 
  369         rv = bus_print_child_header(dev, child);
  370         rv += dma_print_res(device_get_ivars(child));
  371         rv += bus_print_child_footer(dev, child);
  372         return (rv);
  373 }
  374 
  375 static void
  376 dma_probe_nomatch(device_t dev, device_t child)
  377 {
  378         const char *type;
  379 
  380         device_printf(dev, "<%s>", ofw_bus_get_name(child));
  381         dma_print_res(device_get_ivars(child));
  382         type = ofw_bus_get_type(child);
  383         printf(" type %s (no driver attached)\n",
  384             type != NULL ? type : "unknown");
  385 }
  386 
  387 static struct resource_list *
  388 dma_get_resource_list(device_t dev, device_t child)
  389 {
  390         struct dma_devinfo *ddi;
  391 
  392         ddi = device_get_ivars(child);
  393         return (&ddi->ddi_rl);
  394 }
  395 
  396 static const struct ofw_bus_devinfo *
  397 dma_get_devinfo(device_t bus, device_t child)
  398 {
  399         struct dma_devinfo *ddi;
  400 
  401         ddi = device_get_ivars(child);
  402         return (&ddi->ddi_obdinfo);
  403 }
  404 
  405 static int
  406 dma_print_res(struct dma_devinfo *ddi)
  407 {
  408         int rv;
  409 
  410         rv = 0;
  411         rv += resource_list_print_type(&ddi->ddi_rl, "mem", SYS_RES_MEMORY,
  412             "%#lx");
  413         rv += resource_list_print_type(&ddi->ddi_rl, "irq", SYS_RES_IRQ, "%ld");
  414         return (rv);
  415 }

Cache object: 1a6aabdf2249401b55684f9d1b7ce76b


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