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  * SPDX-License-Identifier: BSD-2-Clause-NetBSD AND BSD-2-Clause-FreeBSD
    6  *
    7  * Copyright (c) 1998 The NetBSD Foundation, Inc.
    8  * All rights reserved.
    9  *
   10  * This code is derived from software contributed to The NetBSD Foundation
   11  * by Paul Kranenburg.
   12  *
   13  * Redistribution and use in source and binary forms, with or without
   14  * modification, are permitted provided that the following conditions
   15  * are met:
   16  * 1. Redistributions of source code must retain the above copyright
   17  *    notice, this list of conditions and the following disclaimer.
   18  * 2. Redistributions in binary form must reproduce the above copyright
   19  *    notice, this list of conditions and the following disclaimer in the
   20  *    documentation and/or other materials provided with the distribution.
   21  *
   22  * THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS
   23  * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED
   24  * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
   25  * PURPOSE ARE DISCLAIMED.  IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS
   26  * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
   27  * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
   28  * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
   29  * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
   30  * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
   31  * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
   32  * POSSIBILITY OF SUCH DAMAGE.
   33  */
   34 
   35 /*-
   36  * Copyright (c) 1994 Peter Galbavy.  All rights reserved.
   37  * Copyright (c) 2005 Marius Strobl <marius@FreeBSD.org>. All rights reserved.
   38  *
   39  * Redistribution and use in source and binary forms, with or without
   40  * modification, are permitted provided that the following conditions
   41  * are met:
   42  * 1. Redistributions of source code must retain the above copyright
   43  *    notice, this list of conditions and the following disclaimer.
   44  * 2. Redistributions in binary form must reproduce the above copyright
   45  *    notice, this list of conditions and the following disclaimer in the
   46  *    documentation and/or other materials provided with the distribution.
   47  *
   48  * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
   49  * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
   50  * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
   51  * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
   52  * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
   53  * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
   54  * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
   55  * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
   56  * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
   57  * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
   58  */
   59 
   60 #include <sys/cdefs.h>
   61 __FBSDID("$FreeBSD: stable/12/sys/sparc64/sbus/dma_sbus.c 332310 2018-04-08 22:59:34Z gonzo $");
   62 
   63 #include <sys/param.h>
   64 #include <sys/systm.h>
   65 #include <sys/bus.h>
   66 #include <sys/kernel.h>
   67 #include <sys/module.h>
   68 #include <sys/rman.h>
   69 
   70 #include <dev/ofw/ofw_bus.h>
   71 #include <dev/ofw/ofw_bus_subr.h>
   72 #include <dev/ofw/openfirm.h>
   73 
   74 #include <machine/bus.h>
   75 #include <machine/bus_common.h>
   76 #include <machine/resource.h>
   77 
   78 #include <sparc64/sbus/lsi64854reg.h>
   79 #include <sparc64/sbus/lsi64854var.h>
   80 #include <sparc64/sbus/ofw_sbus.h>
   81 #include <sparc64/sbus/sbusreg.h>
   82 #include <sparc64/sbus/sbusvar.h>
   83 
   84 struct dma_devinfo {
   85         struct ofw_bus_devinfo  ddi_obdinfo;
   86         struct resource_list    ddi_rl;
   87 };
   88 
   89 struct dma_softc {
   90         struct lsi64854_softc   sc_lsi64854;    /* base device */
   91         int                     sc_ign;
   92         int                     sc_slot;
   93 };
   94 
   95 static devclass_t dma_devclass;
   96 
   97 static device_probe_t dma_probe;
   98 static device_attach_t dma_attach;
   99 static bus_print_child_t dma_print_child;
  100 static bus_probe_nomatch_t dma_probe_nomatch;
  101 static bus_get_resource_list_t dma_get_resource_list;
  102 static ofw_bus_get_devinfo_t dma_get_devinfo;
  103 
  104 static struct dma_devinfo *dma_setup_dinfo(device_t, struct dma_softc *,
  105     phandle_t);
  106 static void dma_destroy_dinfo(struct dma_devinfo *);
  107 static int dma_print_res(struct dma_devinfo *);
  108 
  109 static device_method_t dma_methods[] = {
  110         /* Device interface */
  111         DEVMETHOD(device_probe,         dma_probe),
  112         DEVMETHOD(device_attach,        dma_attach),
  113         DEVMETHOD(device_shutdown,      bus_generic_shutdown),
  114         DEVMETHOD(device_suspend,       bus_generic_suspend),
  115         DEVMETHOD(device_resume,        bus_generic_resume),
  116 
  117         /* Bus interface */
  118         DEVMETHOD(bus_print_child,      dma_print_child),
  119         DEVMETHOD(bus_probe_nomatch,    dma_probe_nomatch),
  120         DEVMETHOD(bus_alloc_resource,   bus_generic_rl_alloc_resource),
  121         DEVMETHOD(bus_activate_resource, bus_generic_activate_resource),
  122         DEVMETHOD(bus_deactivate_resource, bus_generic_deactivate_resource),
  123         DEVMETHOD(bus_adjust_resource,  bus_generic_adjust_resource),
  124         DEVMETHOD(bus_release_resource, bus_generic_rl_release_resource),
  125         DEVMETHOD(bus_setup_intr,       bus_generic_setup_intr),
  126         DEVMETHOD(bus_teardown_intr,    bus_generic_teardown_intr),
  127         DEVMETHOD(bus_get_resource,     bus_generic_rl_get_resource),
  128         DEVMETHOD(bus_get_resource_list, dma_get_resource_list),
  129         DEVMETHOD(bus_child_pnpinfo_str, ofw_bus_gen_child_pnpinfo_str),
  130 
  131         /* ofw_bus interface */
  132         DEVMETHOD(ofw_bus_get_devinfo,  dma_get_devinfo),
  133         DEVMETHOD(ofw_bus_get_compat,   ofw_bus_gen_get_compat),
  134         DEVMETHOD(ofw_bus_get_model,    ofw_bus_gen_get_model),
  135         DEVMETHOD(ofw_bus_get_name,     ofw_bus_gen_get_name),
  136         DEVMETHOD(ofw_bus_get_node,     ofw_bus_gen_get_node),
  137         DEVMETHOD(ofw_bus_get_type,     ofw_bus_gen_get_type),
  138 
  139         DEVMETHOD_END
  140 };
  141 
  142 static driver_t dma_driver = {
  143         "dma",
  144         dma_methods,
  145         sizeof(struct dma_softc),
  146 };
  147 
  148 /*
  149  * The probe order is handled by sbus(4) as we don't want the variants
  150  * with children to be attached earlier than the stand-alone controllers
  151  * in order to generally preserve the OFW device tree order.
  152  */
  153 EARLY_DRIVER_MODULE(dma, sbus, dma_driver, dma_devclass, 0, 0,
  154     BUS_PASS_DEFAULT);
  155 MODULE_DEPEND(dma, sbus, 1, 1, 1);
  156 MODULE_VERSION(dma, 1);
  157 
  158 static int
  159 dma_probe(device_t dev)
  160 {
  161         const char *name;
  162 
  163         name = ofw_bus_get_name(dev);
  164         if (strcmp(name, "espdma") == 0 || strcmp(name, "dma") == 0 ||
  165             strcmp(name, "ledma") == 0) {
  166                 device_set_desc_copy(dev, name);
  167                 return (0);
  168         }
  169         return (ENXIO);
  170 }
  171 
  172 static int
  173 dma_attach(device_t dev)
  174 {
  175         struct dma_softc *dsc;
  176         struct lsi64854_softc *lsc;
  177         struct dma_devinfo *ddi;
  178         device_t cdev;
  179         const char *name;
  180         char *cabletype;
  181         uint32_t csr;
  182         phandle_t child, node;
  183         int error, i;
  184 
  185         dsc = device_get_softc(dev);
  186         lsc = &dsc->sc_lsi64854;
  187 
  188         name = ofw_bus_get_name(dev);
  189         node = ofw_bus_get_node(dev);
  190         dsc->sc_ign = sbus_get_ign(dev);
  191         dsc->sc_slot = sbus_get_slot(dev);
  192 
  193         i = 0;
  194         lsc->sc_res = bus_alloc_resource_any(dev, SYS_RES_MEMORY, &i,
  195             RF_ACTIVE);
  196         if (lsc->sc_res == NULL) {
  197                 device_printf(dev, "cannot allocate resources\n");
  198                 return (ENXIO);
  199         }
  200 
  201         if (strcmp(name, "espdma") == 0 || strcmp(name, "dma") == 0)
  202                 lsc->sc_channel = L64854_CHANNEL_SCSI;
  203         else if (strcmp(name, "ledma") == 0) {
  204                 /*
  205                  * Check to see which cable type is currently active and
  206                  * set the appropriate bit in the ledma csr so that it
  207                  * gets used. If we didn't netboot, the PROM won't have
  208                  * the "cable-selection" property; default to TP and then
  209                  * the user can change it via a "media" option to ifconfig.
  210                  */
  211                 csr = L64854_GCSR(lsc);
  212                 if ((OF_getprop_alloc(node, "cable-selection",
  213                     (void **)&cabletype)) == -1) {
  214                         /* assume TP if nothing there */
  215                         csr |= E_TP_AUI;
  216                 } else {
  217                         if (strcmp(cabletype, "aui") == 0)
  218                                 csr &= ~E_TP_AUI;
  219                         else
  220                                 csr |= E_TP_AUI;
  221                         OF_prop_free(cabletype);
  222                 }
  223                 L64854_SCSR(lsc, csr);
  224                 DELAY(20000);   /* manual says we need a 20ms delay */
  225                 lsc->sc_channel = L64854_CHANNEL_ENET;
  226         } else {
  227                 device_printf(dev, "unsupported DMA channel\n");
  228                 error = ENXIO;
  229                 goto fail_lres;
  230         }
  231 
  232         error = bus_dma_tag_create(
  233             bus_get_dma_tag(dev),       /* parent */
  234             1, 0,                       /* alignment, boundary */
  235             BUS_SPACE_MAXADDR,          /* lowaddr */
  236             BUS_SPACE_MAXADDR,          /* highaddr */
  237             NULL, NULL,                 /* filter, filterarg */
  238             BUS_SPACE_MAXSIZE,          /* maxsize */
  239             BUS_SPACE_UNRESTRICTED,     /* nsegments */
  240             BUS_SPACE_MAXSIZE,          /* maxsegsize */
  241             0,                          /* flags */
  242             NULL, NULL,                 /* no locking */
  243             &lsc->sc_parent_dmat);
  244         if (error != 0) {
  245                 device_printf(dev, "cannot allocate parent DMA tag\n");
  246                 goto fail_lres;
  247         }
  248 
  249         i = sbus_get_burstsz(dev);
  250         lsc->sc_burst = (i & SBUS_BURST_32) ? 32 :
  251             (i & SBUS_BURST_16) ? 16 : 0;
  252         lsc->sc_dev = dev;
  253 
  254         /* Attach children. */
  255         i = 0;
  256         for (child = OF_child(node); child != 0; child = OF_peer(child)) {
  257                 if ((ddi = dma_setup_dinfo(dev, dsc, child)) == NULL)
  258                         continue;
  259                 if (i != 0) {
  260                         device_printf(dev,
  261                             "<%s>: only one child per DMA channel supported\n",
  262                             ddi->ddi_obdinfo.obd_name);
  263                         dma_destroy_dinfo(ddi);
  264                         continue;
  265                 }
  266                 if ((cdev = device_add_child(dev, NULL, -1)) == NULL) {
  267                         device_printf(dev, "<%s>: device_add_child failed\n",
  268                             ddi->ddi_obdinfo.obd_name);
  269                         dma_destroy_dinfo(ddi);
  270                         continue;
  271                 }
  272                 device_set_ivars(cdev, ddi);
  273                 i++;
  274         }
  275         return (bus_generic_attach(dev));
  276 
  277  fail_lres:
  278         bus_release_resource(dev, SYS_RES_MEMORY, rman_get_rid(lsc->sc_res),
  279             lsc->sc_res);
  280         return (error);
  281 }
  282 
  283 static struct dma_devinfo *
  284 dma_setup_dinfo(device_t dev, struct dma_softc *dsc, phandle_t node)
  285 {
  286         struct dma_devinfo *ddi;
  287         struct sbus_regs *reg;
  288         uint32_t base, iv, *intr;
  289         int i, nreg, nintr, slot, rslot;
  290 
  291         ddi = malloc(sizeof(*ddi), M_DEVBUF, M_WAITOK | M_ZERO);
  292         if (ofw_bus_gen_setup_devinfo(&ddi->ddi_obdinfo, node) != 0) {
  293                 free(ddi, M_DEVBUF);
  294                 return (NULL);
  295         }
  296         resource_list_init(&ddi->ddi_rl);
  297         slot = -1;
  298         nreg = OF_getprop_alloc_multi(node, "reg", sizeof(*reg), (void **)&reg);
  299         if (nreg == -1) {
  300                 device_printf(dev, "<%s>: incomplete\n",
  301                     ddi->ddi_obdinfo.obd_name);
  302                 goto fail;
  303         }
  304         for (i = 0; i < nreg; i++) {
  305                 base = reg[i].sbr_offset;
  306                 if (SBUS_ABS(base)) {
  307                         rslot = SBUS_ABS_TO_SLOT(base);
  308                         base = SBUS_ABS_TO_OFFSET(base);
  309                 } else
  310                         rslot = reg[i].sbr_slot;
  311                 if (slot != -1 && slot != rslot) {
  312                         device_printf(dev, "<%s>: multiple slots\n",
  313                             ddi->ddi_obdinfo.obd_name);
  314                         OF_prop_free(reg);
  315                         goto fail;
  316                 }
  317                 slot = rslot;
  318 
  319                 resource_list_add(&ddi->ddi_rl, SYS_RES_MEMORY, i, base,
  320                     base + reg[i].sbr_size, reg[i].sbr_size);
  321         }
  322         OF_prop_free(reg);
  323         if (slot != dsc->sc_slot) {
  324                 device_printf(dev, "<%s>: parent and child slot do not match\n",
  325                     ddi->ddi_obdinfo.obd_name);
  326                 goto fail;
  327         }
  328 
  329         /*
  330          * The `interrupts' property contains the SBus interrupt level.
  331          */
  332         nintr = OF_getprop_alloc_multi(node, "interrupts", sizeof(*intr),
  333             (void **)&intr);
  334         if (nintr != -1) {
  335                 for (i = 0; i < nintr; i++) {
  336                         iv = intr[i];
  337                         /*
  338                          * SBus card devices need the slot number encoded into
  339                          * the vector as this is generally not done.
  340                          */
  341                         if ((iv & INTMAP_OBIO_MASK) == 0)
  342                                 iv |= slot << 3;
  343                         /* Set the IGN as appropriate. */
  344                         iv |= dsc->sc_ign << INTMAP_IGN_SHIFT;
  345                         resource_list_add(&ddi->ddi_rl, SYS_RES_IRQ, i,
  346                             iv, iv, 1);
  347                 }
  348                 OF_prop_free(intr);
  349         }
  350         return (ddi);
  351 
  352  fail:
  353         dma_destroy_dinfo(ddi);
  354         return (NULL);
  355 }
  356 
  357 static void
  358 dma_destroy_dinfo(struct dma_devinfo *dinfo)
  359 {
  360 
  361         resource_list_free(&dinfo->ddi_rl);
  362         ofw_bus_gen_destroy_devinfo(&dinfo->ddi_obdinfo);
  363         free(dinfo, M_DEVBUF);
  364 }
  365 
  366 static int
  367 dma_print_child(device_t dev, device_t child)
  368 {
  369         int rv;
  370 
  371         rv = bus_print_child_header(dev, child);
  372         rv += dma_print_res(device_get_ivars(child));
  373         rv += bus_print_child_footer(dev, child);
  374         return (rv);
  375 }
  376 
  377 static void
  378 dma_probe_nomatch(device_t dev, device_t child)
  379 {
  380         const char *type;
  381 
  382         device_printf(dev, "<%s>", ofw_bus_get_name(child));
  383         dma_print_res(device_get_ivars(child));
  384         type = ofw_bus_get_type(child);
  385         printf(" type %s (no driver attached)\n",
  386             type != NULL ? type : "unknown");
  387 }
  388 
  389 static struct resource_list *
  390 dma_get_resource_list(device_t dev, device_t child)
  391 {
  392         struct dma_devinfo *ddi;
  393 
  394         ddi = device_get_ivars(child);
  395         return (&ddi->ddi_rl);
  396 }
  397 
  398 static const struct ofw_bus_devinfo *
  399 dma_get_devinfo(device_t bus, device_t child)
  400 {
  401         struct dma_devinfo *ddi;
  402 
  403         ddi = device_get_ivars(child);
  404         return (&ddi->ddi_obdinfo);
  405 }
  406 
  407 static int
  408 dma_print_res(struct dma_devinfo *ddi)
  409 {
  410         int rv;
  411 
  412         rv = 0;
  413         rv += resource_list_print_type(&ddi->ddi_rl, "mem", SYS_RES_MEMORY,
  414             "%#jx");
  415         rv += resource_list_print_type(&ddi->ddi_rl, "irq", SYS_RES_IRQ, "%jd");
  416         return (rv);
  417 }

Cache object: 9719c477594471eaa1dfd534088d0f24


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