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 1.12 2005/03/03 01:41:45 miod Exp $      */
    2 /*      $NetBSD: dma_sbus.c,v 1.5 2000/07/09 20:57:42 pk 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  * 3. All advertising materials mentioning features or use of this software
   20  *    must display the following acknowledgement:
   21  *        This product includes software developed by the NetBSD
   22  *        Foundation, Inc. and its contributors.
   23  * 4. Neither the name of The NetBSD Foundation nor the names of its
   24  *    contributors may be used to endorse or promote products derived
   25  *    from this software without specific prior written permission.
   26  *
   27  * THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS
   28  * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED
   29  * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
   30  * PURPOSE ARE DISCLAIMED.  IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS
   31  * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
   32  * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
   33  * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
   34  * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
   35  * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
   36  * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
   37  * POSSIBILITY OF SUCH DAMAGE.
   38  */
   39 
   40 /*-
   41  * Copyright (c) 1994 Peter Galbavy.  All rights reserved.
   42  * Copyright (c) 2005 Marius Strobl <marius@FreeBSD.org>. All rights reserved.
   43  *
   44  * Redistribution and use in source and binary forms, with or without
   45  * modification, are permitted provided that the following conditions
   46  * are met:
   47  * 1. Redistributions of source code must retain the above copyright
   48  *    notice, this list of conditions and the following disclaimer.
   49  * 2. Redistributions in binary form must reproduce the above copyright
   50  *    notice, this list of conditions and the following disclaimer in the
   51  *    documentation and/or other materials provided with the distribution.
   52  *
   53  * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
   54  * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
   55  * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
   56  * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
   57  * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
   58  * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
   59  * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
   60  * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
   61  * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
   62  * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
   63  */
   64 
   65 #include <sys/cdefs.h>
   66 __FBSDID("$FreeBSD: releng/7.4/sys/sparc64/sbus/dma_sbus.c 190286 2009-03-22 21:14:33Z marius $");
   67 
   68 #include <sys/param.h>
   69 #include <sys/systm.h>
   70 #include <sys/bus.h>
   71 #include <sys/kernel.h>
   72 #include <sys/module.h>
   73 #include <sys/rman.h>
   74 
   75 #include <dev/ofw/ofw_bus.h>
   76 #include <dev/ofw/ofw_bus_subr.h>
   77 #include <dev/ofw/openfirm.h>
   78 
   79 #include <machine/bus.h>
   80 #include <machine/bus_common.h>
   81 #include <machine/resource.h>
   82 
   83 #include <sparc64/sbus/lsi64854reg.h>
   84 #include <sparc64/sbus/lsi64854var.h>
   85 #include <sparc64/sbus/ofw_sbus.h>
   86 #include <sparc64/sbus/sbusreg.h>
   87 #include <sparc64/sbus/sbusvar.h>
   88 
   89 struct dma_devinfo {
   90         struct ofw_bus_devinfo  ddi_obdinfo;
   91         struct resource_list    ddi_rl;
   92 };
   93 
   94 struct dma_softc {
   95         struct lsi64854_softc   sc_lsi64854;    /* base device */
   96         int                     sc_ign;
   97         int                     sc_slot;
   98 };
   99 
  100 static devclass_t dma_devclass;
  101 
  102 static device_probe_t dma_probe;
  103 static device_attach_t dma_attach;
  104 static bus_print_child_t dma_print_child;
  105 static bus_probe_nomatch_t dma_probe_nomatch;
  106 static bus_get_resource_list_t dma_get_resource_list;
  107 static ofw_bus_get_devinfo_t dma_get_devinfo;
  108 
  109 static struct dma_devinfo *dma_setup_dinfo(device_t, struct dma_softc *,
  110     phandle_t);
  111 static void dma_destroy_dinfo(struct dma_devinfo *);
  112 static int dma_print_res(struct dma_devinfo *);
  113 
  114 static device_method_t dma_methods[] = {
  115         /* Device interface */
  116         DEVMETHOD(device_probe,         dma_probe),
  117         DEVMETHOD(device_attach,        dma_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_print_child,      dma_print_child),
  124         DEVMETHOD(bus_probe_nomatch,    dma_probe_nomatch),
  125         DEVMETHOD(bus_alloc_resource,   bus_generic_rl_alloc_resource),
  126         DEVMETHOD(bus_activate_resource, bus_generic_activate_resource),
  127         DEVMETHOD(bus_deactivate_resource, bus_generic_deactivate_resource),
  128         DEVMETHOD(bus_release_resource, bus_generic_rl_release_resource),
  129         DEVMETHOD(bus_setup_intr,       bus_generic_setup_intr),
  130         DEVMETHOD(bus_teardown_intr,    bus_generic_teardown_intr),
  131         DEVMETHOD(bus_get_resource,     bus_generic_rl_get_resource),
  132         DEVMETHOD(bus_get_resource_list, dma_get_resource_list),
  133 
  134         /* ofw_bus interface */
  135         DEVMETHOD(ofw_bus_get_devinfo,  dma_get_devinfo),
  136         DEVMETHOD(ofw_bus_get_compat,   ofw_bus_gen_get_compat),
  137         DEVMETHOD(ofw_bus_get_model,    ofw_bus_gen_get_model),
  138         DEVMETHOD(ofw_bus_get_name,     ofw_bus_gen_get_name),
  139         DEVMETHOD(ofw_bus_get_node,     ofw_bus_gen_get_node),
  140         DEVMETHOD(ofw_bus_get_type,     ofw_bus_gen_get_type),
  141 
  142         KOBJMETHOD_END
  143 };
  144 
  145 static driver_t dma_driver = {
  146         "dma",
  147         dma_methods,
  148         sizeof(struct dma_softc),
  149 };
  150 
  151 DRIVER_MODULE(dma, sbus, dma_driver, dma_devclass, 0, 0);
  152 MODULE_DEPEND(dma, sbus, 1, 1, 1);
  153 MODULE_VERSION(dma, 1);
  154 
  155 static int
  156 dma_probe(device_t dev)
  157 {
  158         const char *name;
  159 
  160         name = ofw_bus_get_name(dev);
  161         if (strcmp(name, "espdma") == 0 || strcmp(name, "dma") == 0 ||
  162             strcmp(name, "ledma") == 0) {
  163                 device_set_desc_copy(dev, name);
  164                 return (0);
  165         }
  166         return (ENXIO);
  167 }
  168 
  169 static int
  170 dma_attach(device_t dev)
  171 {
  172         struct dma_softc *dsc;
  173         struct lsi64854_softc *lsc;
  174         struct dma_devinfo *ddi;
  175         device_t cdev;
  176         const char *name;
  177         char *cabletype;
  178         uint32_t csr;
  179         phandle_t child, node;
  180         int error, i;
  181 
  182         dsc = device_get_softc(dev);
  183         lsc = &dsc->sc_lsi64854;
  184 
  185         name = ofw_bus_get_name(dev);
  186         node = ofw_bus_get_node(dev);
  187         dsc->sc_ign = sbus_get_ign(dev);
  188         dsc->sc_slot = sbus_get_slot(dev);
  189 
  190         i = 0;
  191         lsc->sc_res = bus_alloc_resource_any(dev, SYS_RES_MEMORY, &i,
  192             RF_ACTIVE);
  193         if (lsc->sc_res == NULL) {
  194                 device_printf(dev, "cannot allocate resources\n");
  195                 return (ENXIO);
  196         }
  197 
  198         if (strcmp(name, "espdma") == 0 || strcmp(name, "dma") == 0)
  199                 lsc->sc_channel = L64854_CHANNEL_SCSI;
  200         else if (strcmp(name, "ledma") == 0) {
  201                 /*
  202                  * Check to see which cable type is currently active and
  203                  * set the appropriate bit in the ledma csr so that it
  204                  * gets used. If we didn't netboot, the PROM won't have
  205                  * the "cable-selection" property; default to TP and then
  206                  * the user can change it via a "media" option to ifconfig.
  207                  */
  208                 csr = L64854_GCSR(lsc);
  209                 if ((OF_getprop_alloc(node, "cable-selection", 1,
  210                     (void **)&cabletype)) == -1) {
  211                         /* assume TP if nothing there */
  212                         csr |= E_TP_AUI;
  213                 } else {
  214                         if (strcmp(cabletype, "aui") == 0)
  215                                 csr &= ~E_TP_AUI;
  216                         else
  217                                 csr |= E_TP_AUI;
  218                         free(cabletype, M_OFWPROP);
  219                 }
  220                 L64854_SCSR(lsc, csr);
  221                 DELAY(20000);   /* manual says we need a 20ms delay */
  222                 lsc->sc_channel = L64854_CHANNEL_ENET;
  223         } else {
  224                 device_printf(dev, "unsupported DMA channel\n");
  225                 error = ENXIO;
  226                 goto fail_lres;
  227         }
  228 
  229         error = bus_dma_tag_create(
  230             bus_get_dma_tag(dev),       /* parent */
  231             1, 0,                       /* alignment, boundary */
  232             BUS_SPACE_MAXADDR,          /* lowaddr */
  233             BUS_SPACE_MAXADDR,          /* highaddr */
  234             NULL, NULL,                 /* filter, filterarg */
  235             BUS_SPACE_MAXSIZE_32BIT,    /* maxsize */
  236             0,                          /* nsegments */
  237             BUS_SPACE_MAXSIZE_32BIT,    /* maxsegsize */
  238             0,                          /* flags */
  239             NULL, NULL,                 /* no locking */
  240             &lsc->sc_parent_dmat);
  241         if (error != 0) {
  242                 device_printf(dev, "cannot allocate parent DMA tag\n");
  243                 goto fail_lres;
  244         }
  245 
  246         i = sbus_get_burstsz(dev);
  247         lsc->sc_burst = (i & SBUS_BURST_32) ? 32 :
  248             (i & SBUS_BURST_16) ? 16 : 0;
  249         lsc->sc_dev = dev;
  250 
  251         /* Attach children. */
  252         i = 0;
  253         for (child = OF_child(node); child != 0; child = OF_peer(child)) {
  254                 if ((ddi = dma_setup_dinfo(dev, dsc, child)) == NULL)
  255                         continue;
  256                 if (i != 0) {
  257                         device_printf(dev,
  258                             "<%s>: only one child per DMA channel supported\n",
  259                             ddi->ddi_obdinfo.obd_name);
  260                         dma_destroy_dinfo(ddi);
  261                         continue;
  262                 }
  263                 if ((cdev = device_add_child(dev, NULL, -1)) == NULL) {
  264                         device_printf(dev, "<%s>: device_add_child failed\n",
  265                             ddi->ddi_obdinfo.obd_name);
  266                         dma_destroy_dinfo(ddi);
  267                         continue;
  268                 }
  269                 device_set_ivars(cdev, ddi);
  270                 i++;
  271         }
  272         return (bus_generic_attach(dev));
  273 
  274  fail_lres:
  275         bus_release_resource(dev, SYS_RES_MEMORY, rman_get_rid(lsc->sc_res),
  276             lsc->sc_res);
  277         return (error);
  278 }
  279 
  280 static struct dma_devinfo *
  281 dma_setup_dinfo(device_t dev, struct dma_softc *dsc, phandle_t node)
  282 {
  283         struct dma_devinfo *ddi;
  284         struct sbus_regs *reg;
  285         uint32_t base, iv, *intr;
  286         int i, nreg, nintr, slot, rslot;
  287 
  288         ddi = malloc(sizeof(*ddi), M_DEVBUF, M_WAITOK | M_ZERO);
  289         if (ofw_bus_gen_setup_devinfo(&ddi->ddi_obdinfo, node) != 0) {
  290                 free(ddi, M_DEVBUF);
  291                 return (NULL);
  292         }
  293         resource_list_init(&ddi->ddi_rl);
  294         slot = -1;
  295         nreg = OF_getprop_alloc(node, "reg", sizeof(*reg), (void **)&reg);
  296         if (nreg == -1) {
  297                 device_printf(dev, "<%s>: incomplete\n",
  298                     ddi->ddi_obdinfo.obd_name);
  299                 goto fail;
  300         }
  301         for (i = 0; i < nreg; i++) {
  302                 base = reg[i].sbr_offset;
  303                 if (SBUS_ABS(base)) {
  304                         rslot = SBUS_ABS_TO_SLOT(base);
  305                         base = SBUS_ABS_TO_OFFSET(base);
  306                 } else
  307                         rslot = reg[i].sbr_slot;
  308                 if (slot != -1 && slot != rslot) {
  309                         device_printf(dev, "<%s>: multiple slots\n",
  310                             ddi->ddi_obdinfo.obd_name);
  311                         free(reg, M_OFWPROP);
  312                         goto fail;
  313                 }
  314                 slot = rslot;
  315 
  316                 resource_list_add(&ddi->ddi_rl, SYS_RES_MEMORY, i, base,
  317                     base + reg[i].sbr_size, reg[i].sbr_size);
  318         }
  319         free(reg, M_OFWPROP);
  320         if (slot != dsc->sc_slot) {
  321                 device_printf(dev, "<%s>: parent and child slot do not match\n",
  322                     ddi->ddi_obdinfo.obd_name);
  323                 goto fail;
  324         }
  325 
  326         /*
  327          * The `interrupts' property contains the SBus interrupt level.
  328          */
  329         nintr = OF_getprop_alloc(node, "interrupts", sizeof(*intr),
  330             (void **)&intr);
  331         if (nintr != -1) {
  332                 for (i = 0; i < nintr; i++) {
  333                         iv = intr[i];
  334                         /*
  335                          * SBus card devices need the slot number encoded into
  336                          * the vector as this is generally not done.
  337                          */
  338                         if ((iv & INTMAP_OBIO_MASK) == 0)
  339                                 iv |= slot << 3;
  340                         /* Set the IGN as appropriate. */
  341                         iv |= dsc->sc_ign << INTMAP_IGN_SHIFT;
  342                         resource_list_add(&ddi->ddi_rl, SYS_RES_IRQ, i,
  343                             iv, iv, 1);
  344                 }
  345                 free(intr, M_OFWPROP);
  346         }
  347         return (ddi);
  348 
  349  fail:
  350         dma_destroy_dinfo(ddi);
  351         return (NULL);
  352 }
  353 
  354 static void
  355 dma_destroy_dinfo(struct dma_devinfo *dinfo)
  356 {
  357 
  358         resource_list_free(&dinfo->ddi_rl);
  359         ofw_bus_gen_destroy_devinfo(&dinfo->ddi_obdinfo);
  360         free(dinfo, M_DEVBUF);
  361 }
  362 
  363 static int
  364 dma_print_child(device_t dev, device_t child)
  365 {
  366         int rv;
  367 
  368         rv = bus_print_child_header(dev, child);
  369         rv += dma_print_res(device_get_ivars(child));
  370         rv += bus_print_child_footer(dev, child);
  371         return (rv);
  372 }
  373 
  374 static void
  375 dma_probe_nomatch(device_t dev, device_t child)
  376 {
  377         const char *type;
  378 
  379         device_printf(dev, "<%s>", ofw_bus_get_name(child));
  380         dma_print_res(device_get_ivars(child));
  381         type = ofw_bus_get_type(child);
  382         printf(" type %s (no driver attached)\n",
  383             type != NULL ? type : "unknown");
  384 }
  385 
  386 static struct resource_list *
  387 dma_get_resource_list(device_t dev, device_t child)
  388 {
  389         struct dma_devinfo *ddi;
  390 
  391         ddi = device_get_ivars(child);
  392         return (&ddi->ddi_rl);
  393 }
  394 
  395 static const struct ofw_bus_devinfo *
  396 dma_get_devinfo(device_t bus, device_t child)
  397 {
  398         struct dma_devinfo *ddi;
  399 
  400         ddi = device_get_ivars(child);
  401         return (&ddi->ddi_obdinfo);
  402 }
  403 
  404 static int
  405 dma_print_res(struct dma_devinfo *ddi)
  406 {
  407         int rv;
  408 
  409         rv = 0;
  410         rv += resource_list_print_type(&ddi->ddi_rl, "mem", SYS_RES_MEMORY,
  411             "%#lx");
  412         rv += resource_list_print_type(&ddi->ddi_rl, "irq", SYS_RES_IRQ, "%ld");
  413         return (rv);
  414 }

Cache object: 18b3db0482f4821855343ec6bab91d60


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