sys/dev/etherswitch/e6000sw/e6000sw.c

   1 /*-
   2  * Copyright (c) 2015 Semihalf
   3  * Copyright (c) 2015 Stormshield
   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 <sys/types.h>
  32 #include <sys/param.h>
  33 #include <sys/systm.h>
  34 #include <sys/sockio.h>
  35 #include <sys/kernel.h>
  36 #include <sys/kthread.h>
  37 #include <sys/socket.h>
  38 #include <sys/module.h>
  39 #include <sys/errno.h>
  40 #include <sys/bus.h>
  41 #include <sys/conf.h>
  42 #include <sys/uio.h>
  43 #include <sys/fcntl.h>
  44
  45 #include <net/if.h>
  46 #include <net/if_media.h>
  47 #include <net/if_types.h>
  48
  49 #include <machine/bus.h>
  50 #include <machine/resource.h>
  51
  52 #include <arm/mv/mvwin.h>
  53 #include <arm/mv/mvreg.h>
  54 #include <arm/mv/mvvar.h>
  55
  56 #include <dev/etherswitch/etherswitch.h>
  57 #include <dev/mdio/mdio.h>
  58 #include <dev/mii/mii.h>
  59 #include <dev/mii/miivar.h>
  60 #include <dev/mge/if_mgevar.h>
  61
  62 #include <dev/fdt/fdt_common.h>
  63 #include <dev/ofw/ofw_bus.h>
  64 #include <dev/ofw/ofw_bus_subr.h>
  65
  66 #include "e6000swreg.h"
  67 #include "etherswitch_if.h"
  68 #include "miibus_if.h"
  69 #include "mdio_if.h"
  70
  71 MALLOC_DECLARE(M_E6000SW);
  72 MALLOC_DEFINE(M_E6000SW, "e6000sw", "e6000sw switch");
  73
  74 #define E6000SW_LOCK(_sc)                       \
  75             sx_xlock(&(_sc)->sx)
  76 #define E6000SW_UNLOCK(_sc)                     \
  77             sx_unlock(&(_sc)->sx)
  78 #define E6000SW_LOCK_ASSERT(_sc, _what)         \
  79             sx_assert(&(_sc)->sx, (_what))
  80 #define E6000SW_TRYLOCK(_sc)                    \
  81             sx_tryxlock(&(_sc)->sx)
  82
  83 typedef struct e6000sw_softc {
  84         device_t                dev;
  85         phandle_t               node;
  86
  87         struct sx               sx;
  88         struct ifnet            *ifp[E6000SW_MAX_PORTS];
  89         char                    *ifname[E6000SW_MAX_PORTS];
  90         device_t                miibus[E6000SW_MAX_PORTS];
  91         struct mii_data         *mii[E6000SW_MAX_PORTS];
  92         struct callout          tick_callout;
  93
  94         uint32_t                cpuports_mask;
  95         uint32_t                fixed_mask;
  96         int                     sw_addr;
  97         int                     num_ports;
  98         boolean_t               multi_chip;
  99
 100         int                     vid[E6000SW_NUM_VGROUPS];
 101         int                     members[E6000SW_NUM_VGROUPS];
 102         int                     vgroup[E6000SW_MAX_PORTS];
 103 } e6000sw_softc_t;
 104
 105 static etherswitch_info_t etherswitch_info = {
 106         .es_nports =            0,
 107         .es_nvlangroups =       E6000SW_NUM_VGROUPS,
 108         .es_name =              "Marvell 6000 series switch"
 109 };
 110
 111 static void e6000sw_identify(driver_t *driver, device_t parent);
 112 static int e6000sw_probe(device_t dev);
 113 static int e6000sw_attach(device_t dev);
 114 static int e6000sw_detach(device_t dev);
 115 static int e6000sw_readphy(device_t dev, int phy, int reg);
 116 static int e6000sw_writephy(device_t dev, int phy, int reg, int data);
 117 static etherswitch_info_t* e6000sw_getinfo(device_t dev);
 118 static void e6000sw_lock(device_t dev);
 119 static void e6000sw_unlock(device_t dev);
 120 static int e6000sw_getport(device_t dev, etherswitch_port_t *p);
 121 static int e6000sw_setport(device_t dev, etherswitch_port_t *p);
 122 static int e6000sw_readreg_wrapper(device_t dev, int addr_reg);
 123 static int e6000sw_writereg_wrapper(device_t dev, int addr_reg, int val);
 124 static int e6000sw_readphy_wrapper(device_t dev, int phy, int reg);
 125 static int e6000sw_writephy_wrapper(device_t dev, int phy, int reg, int data);
 126 static int e6000sw_getvgroup_wrapper(device_t dev, etherswitch_vlangroup_t *vg);
 127 static int e6000sw_setvgroup_wrapper(device_t dev, etherswitch_vlangroup_t *vg);
 128 static int e6000sw_setvgroup(device_t dev, etherswitch_vlangroup_t *vg);
 129 static int e6000sw_getvgroup(device_t dev, etherswitch_vlangroup_t *vg);
 130 static void e6000sw_setup(device_t dev, e6000sw_softc_t *sc);
 131 static void e6000sw_port_vlan_conf(e6000sw_softc_t *sc);
 132 static void e6000sw_tick(void *arg);
 133 static void e6000sw_set_atustat(device_t dev, e6000sw_softc_t *sc, int bin,
 134     int flag);
 135 static int e6000sw_atu_flush(device_t dev, e6000sw_softc_t *sc, int flag);
 136 static __inline void e6000sw_writereg(e6000sw_softc_t *sc, int addr, int reg,
 137     int val);
 138 static __inline uint32_t e6000sw_readreg(e6000sw_softc_t *sc, int addr,
 139     int reg);
 140 static int e6000sw_ifmedia_upd(struct ifnet *ifp);
 141 static void e6000sw_ifmedia_sts(struct ifnet *ifp, struct ifmediareq *ifmr);
 142 static int e6000sw_atu_mac_table(device_t dev, e6000sw_softc_t *sc, struct
 143     atu_opt *atu, int flag);
 144 static int e6000sw_get_pvid(e6000sw_softc_t *sc, int port, int *pvid);
 145 static int e6000sw_set_pvid(e6000sw_softc_t *sc, int port, int pvid);
 146 static __inline int e6000sw_is_cpuport(e6000sw_softc_t *sc, int port);
 147 static __inline int e6000sw_is_fixedport(e6000sw_softc_t *sc, int port);
 148 static __inline int e6000sw_is_phyport(e6000sw_softc_t *sc, int port);
 149 static __inline struct mii_data *e6000sw_miiforphy(e6000sw_softc_t *sc,
 150     unsigned int phy);
 151
 152 static struct proc *e6000sw_kproc;
 153
 154 static device_method_t e6000sw_methods[] = {
 155         /* device interface */
 156         DEVMETHOD(device_identify,              e6000sw_identify),
 157         DEVMETHOD(device_probe,                 e6000sw_probe),
 158         DEVMETHOD(device_attach,                e6000sw_attach),
 159         DEVMETHOD(device_detach,                e6000sw_detach),
 160
 161         /* bus interface */
 162         DEVMETHOD(bus_add_child,                device_add_child_ordered),
 163
 164         /* mii interface */
 165         DEVMETHOD(miibus_readreg,               e6000sw_readphy),
 166         DEVMETHOD(miibus_writereg,              e6000sw_writephy),
 167
 168         /* etherswitch interface */
 169         DEVMETHOD(etherswitch_getinfo,          e6000sw_getinfo),
 170         DEVMETHOD(etherswitch_lock,             e6000sw_lock),
 171         DEVMETHOD(etherswitch_unlock,           e6000sw_unlock),
 172         DEVMETHOD(etherswitch_getport,          e6000sw_getport),
 173         DEVMETHOD(etherswitch_setport,          e6000sw_setport),
 174         DEVMETHOD(etherswitch_readreg,          e6000sw_readreg_wrapper),
 175         DEVMETHOD(etherswitch_writereg,         e6000sw_writereg_wrapper),
 176         DEVMETHOD(etherswitch_readphyreg,       e6000sw_readphy_wrapper),
 177         DEVMETHOD(etherswitch_writephyreg,      e6000sw_writephy_wrapper),
 178         DEVMETHOD(etherswitch_setvgroup,        e6000sw_setvgroup_wrapper),
 179         DEVMETHOD(etherswitch_getvgroup,        e6000sw_getvgroup_wrapper),
 180
 181         DEVMETHOD_END
 182 };
 183
 184 static devclass_t e6000sw_devclass;
 185
 186 DEFINE_CLASS_0(e6000sw, e6000sw_driver, e6000sw_methods,
 187     sizeof(e6000sw_softc_t));
 188
 189 DRIVER_MODULE(e6000sw, mdio, e6000sw_driver, e6000sw_devclass, 0, 0);
 190 DRIVER_MODULE(etherswitch, e6000sw, etherswitch_driver, etherswitch_devclass, 0,
 191     0);
 192 DRIVER_MODULE(miibus, e6000sw, miibus_driver, miibus_devclass, 0, 0);
 193 MODULE_DEPEND(e6000sw, mdio, 1, 1, 1);
 194
 195 #define SMI_CMD 0
 196 #define SMI_CMD_BUSY    (1<<15)
 197 #define SMI_CMD_OP_READ ((2<<10)|SMI_CMD_BUSY|(1<<12))
 198 #define SMI_CMD_OP_WRITE        ((1<<10)|SMI_CMD_BUSY|(1<<12))
 199 #define SMI_DATA        1
 200
 201 #define MDIO_READ(dev, addr, reg) MDIO_READREG(device_get_parent(dev), (addr), (reg))
 202 #define MDIO_WRITE(dev, addr, reg, val) MDIO_WRITEREG(device_get_parent(dev), (addr), (reg), (val))
 203 static void
 204 e6000sw_identify(driver_t *driver, device_t parent)
 205 {
 206
 207         if (device_find_child(parent, "e6000sw", -1) == NULL)
 208                 BUS_ADD_CHILD(parent, 0, "e6000sw", -1);
 209 }
 210
 211 static int
 212 e6000sw_probe(device_t dev)
 213 {
 214         e6000sw_softc_t *sc;
 215         const char *description;
 216         unsigned int id;
 217         phandle_t dsa_node, switch_node;
 218
 219         dsa_node = fdt_find_compatible(OF_finddevice("/"),
 220             "marvell,dsa", 0);
 221         switch_node = OF_child(dsa_node);
 222
 223         if (switch_node == 0)
 224                 return (ENXIO);
 225
 226         sc = device_get_softc(dev);
 227         bzero(sc, sizeof(e6000sw_softc_t));
 228         sc->dev = dev;
 229         sc->node = switch_node;
 230
 231         if (OF_getencprop(sc->node, "reg", &sc->sw_addr,
 232             sizeof(sc->sw_addr)) < 0)
 233                 return (ENXIO);
 234         if (sc->sw_addr != 0 && (sc->sw_addr % 2) == 0)
 235                 sc->multi_chip = true;
 236
 237         /* Lock is necessary due to assertions. */
 238         sx_init(&sc->sx, "e6000sw");
 239         E6000SW_LOCK(sc);
 240
 241         id = e6000sw_readreg(sc, REG_PORT(0), SWITCH_ID);
 242
 243         switch (id & 0xfff0) {
 244         case 0x3520:
 245                 description = "Marvell 88E6352";
 246                 break;
 247         case 0x1720:
 248                 description = "Marvell 88E6172";
 249                 break;
 250         case 0x1760:
 251                 description = "Marvell 88E6176";
 252                 break;
 253         default:
 254                 E6000SW_UNLOCK(sc);
 255                 sx_destroy(&sc->sx);
 256                 device_printf(dev, "Unrecognized device, id 0x%x.\n", id);
 257                 return (ENXIO);
 258         }
 259
 260         device_set_desc(dev, description);
 261
 262         E6000SW_UNLOCK(sc);
 263
 264         return (BUS_PROBE_DEFAULT);
 265 }
 266
 267 static int
 268 e6000sw_parse_child_fdt(device_t dev, phandle_t child, uint32_t *fixed_mask,
 269     uint32_t *cpu_mask, int *pport, int *pvlangroup)
 270 {
 271         char portlabel[100];
 272         uint32_t port, vlangroup;
 273         boolean_t fixed_link;
 274
 275         if (fixed_mask == NULL || cpu_mask == NULL || pport == NULL)
 276                 return (ENXIO);
 277
 278         OF_getprop(child, "label", (void *)portlabel, 100);
 279         OF_getencprop(child, "reg", (void *)&port, sizeof(port));
 280
 281         if (OF_getencprop(child, "vlangroup", (void *)&vlangroup,
 282             sizeof(vlangroup)) > 0) {
 283                 if (vlangroup >= E6000SW_NUM_VGROUPS)
 284                         return (ENXIO);
 285                 *pvlangroup = vlangroup;
 286         } else {
 287                 *pvlangroup = -1;
 288         }
 289
 290         if (port >= E6000SW_MAX_PORTS)
 291                 return (ENXIO);
 292         *pport = port;
 293
 294         if (strncmp(portlabel, "cpu", 3) == 0) {
 295                 device_printf(dev, "CPU port at %d\n", port);
 296                 *cpu_mask |= (1 << port);
 297                 return (0);
 298         }
 299
 300         fixed_link = OF_child(child);
 301         if (fixed_link) {
 302                 *fixed_mask |= (1 << port);
 303                 device_printf(dev, "fixed port at %d\n", port);
 304         } else {
 305                 device_printf(dev, "PHY at %d\n", port);
 306         }
 307
 308         return (0);
 309 }
 310
 311 static int
 312 e6000sw_init_interface(e6000sw_softc_t *sc, int port)
 313 {
 314         char name[IFNAMSIZ];
 315
 316         snprintf(name, IFNAMSIZ, "%sport", device_get_nameunit(sc->dev));
 317
 318         sc->ifp[port] = if_alloc(IFT_ETHER);
 319         if (sc->ifp[port] == NULL)
 320                 return (ENOMEM);
 321         sc->ifp[port]->if_softc = sc;
 322         sc->ifp[port]->if_flags |= IFF_UP | IFF_BROADCAST |
 323             IFF_DRV_RUNNING | IFF_SIMPLEX;
 324         sc->ifname[port] = malloc(strlen(name) + 1, M_E6000SW, M_WAITOK);
 325         if (sc->ifname[port] == NULL)
 326                 return (ENOMEM);
 327         memcpy(sc->ifname[port], name, strlen(name) + 1);
 328         if_initname(sc->ifp[port], sc->ifname[port], port);
 329
 330         return (0);
 331 }
 332
 333 static int
 334 e6000sw_attach_miibus(e6000sw_softc_t *sc, int port)
 335 {
 336         int err;
 337
 338         err = mii_attach(sc->dev, &sc->miibus[port], sc->ifp[port],
 339             e6000sw_ifmedia_upd, e6000sw_ifmedia_sts, BMSR_DEFCAPMASK,
 340             port, MII_OFFSET_ANY, 0);
 341         if (err != 0)
 342                 return (err);
 343
 344         sc->mii[port] = device_get_softc(sc->miibus[port]);
 345         return (0);
 346 }
 347
 348 static int
 349 e6000sw_attach(device_t dev)
 350 {
 351         e6000sw_softc_t *sc;
 352         phandle_t child;
 353         int err, port, vlangroup;
 354         int member_ports[E6000SW_NUM_VGROUPS];
 355         etherswitch_vlangroup_t vg;
 356
 357         err = 0;
 358         sc = device_get_softc(dev);
 359
 360         if (sc->multi_chip)
 361                 device_printf(dev, "multi-chip addressing mode\n");
 362         else
 363                 device_printf(dev, "single-chip addressing mode\n");
 364
 365         E6000SW_LOCK(sc);
 366         e6000sw_setup(dev, sc);
 367         bzero(member_ports, sizeof(member_ports));
 368
 369         for (child = OF_child(sc->node); child != 0; child = OF_peer(child)) {
 370                 err = e6000sw_parse_child_fdt(dev, child, &sc->fixed_mask,
 371                     &sc->cpuports_mask, &port, &vlangroup);
 372                 if (err != 0) {
 373                         device_printf(sc->dev, "failed to parse DTS\n");
 374                         goto out_fail;
 375                 }
 376
 377                 if (vlangroup != -1)
 378                         member_ports[vlangroup] |= (1 << port);
 379
 380                 sc->num_ports++;
 381
 382                 err = e6000sw_init_interface(sc, port);
 383                 if (err != 0) {
 384                         device_printf(sc->dev, "failed to init interface\n");
 385                         goto out_fail;
 386                 }
 387
 388                 /* Don't attach miibus at CPU/fixed ports */
 389                 if (!e6000sw_is_phyport(sc, port))
 390                         continue;
 391
 392                 err = e6000sw_attach_miibus(sc, port);
 393                 if (err != 0) {
 394                         device_printf(sc->dev, "failed to attach miibus\n");
 395                         goto out_fail;
 396                 }
 397         }
 398
 399         etherswitch_info.es_nports = sc->num_ports;
 400         for (port = 0; port < sc->num_ports; port++)
 401                 sc->vgroup[port] = E6000SW_PORT_NO_VGROUP;
 402
 403         /* Set VLAN configuration */
 404         e6000sw_port_vlan_conf(sc);
 405
 406         /* Set vlangroups */
 407         for (vlangroup = 0; vlangroup < E6000SW_NUM_VGROUPS; vlangroup++)
 408                 if (member_ports[vlangroup] != 0) {
 409                         vg.es_vlangroup = vg.es_vid = vlangroup;
 410                         vg.es_member_ports = vg.es_untagged_ports =
 411                             member_ports[vlangroup];
 412                         e6000sw_setvgroup(dev, &vg);
 413                 }
 414
 415         E6000SW_UNLOCK(sc);
 416
 417         bus_generic_probe(dev);
 418         bus_generic_attach(dev);
 419
 420         kproc_create(e6000sw_tick, sc, &e6000sw_kproc, 0, 0,
 421             "e6000sw tick kproc");
 422
 423         return (0);
 424
 425 out_fail:
 426         e6000sw_detach(dev);
 427
 428         return (err);
 429 }
 430
 431 static __inline void
 432 e6000sw_poll_done(e6000sw_softc_t *sc)
 433 {
 434
 435         while (e6000sw_readreg(sc, REG_GLOBAL2, PHY_CMD) &
 436             (1 << PHY_CMD_SMI_BUSY))
 437                 continue;
 438 }
 439
 440 /*
 441  * PHY registers are paged. Put page index in reg 22 (accessible from every
 442  * page), then access specific register.
 443  */
 444 static int
 445 e6000sw_readphy(device_t dev, int phy, int reg)
 446 {
 447         e6000sw_softc_t *sc;
 448         uint32_t val;
 449
 450         sc = device_get_softc(dev);
 451         val = 0;
 452
 453         if (!e6000sw_is_phyport(sc, phy) || reg >= E6000SW_NUM_PHY_REGS) {
 454                 device_printf(dev, "Wrong register address.\n");
 455                 return (EINVAL);
 456         }
 457
 458         E6000SW_LOCK_ASSERT(sc, SA_XLOCKED);
 459
 460         e6000sw_poll_done(sc);
 461         val |= 1 << PHY_CMD_SMI_BUSY;
 462         val |= PHY_CMD_MODE_MDIO << PHY_CMD_MODE;
 463         val |= PHY_CMD_OPCODE_READ << PHY_CMD_OPCODE;
 464         val |= (reg << PHY_CMD_REG_ADDR) & PHY_CMD_REG_ADDR_MASK;
 465         val |= (phy << PHY_CMD_DEV_ADDR) & PHY_CMD_DEV_ADDR_MASK;
 466         e6000sw_writereg(sc, REG_GLOBAL2, SMI_PHY_CMD_REG, val);
 467         e6000sw_poll_done(sc);
 468         val = e6000sw_readreg(sc, REG_GLOBAL2, SMI_PHY_DATA_REG)
 469                 & PHY_DATA_MASK;
 470
 471         return (val);
 472 }
 473
 474 static int
 475 e6000sw_writephy(device_t dev, int phy, int reg, int data)
 476 {
 477         e6000sw_softc_t *sc;
 478         uint32_t val;
 479
 480         sc = device_get_softc(dev);
 481         val = 0;
 482
 483         if (!e6000sw_is_phyport(sc, phy) || reg >= E6000SW_NUM_PHY_REGS) {
 484                 device_printf(dev, "Wrong register address.\n");
 485                 return (EINVAL);
 486         }
 487
 488         E6000SW_LOCK_ASSERT(sc, SA_XLOCKED);
 489
 490         e6000sw_poll_done(sc);
 491         val |= PHY_CMD_MODE_MDIO << PHY_CMD_MODE;
 492         val |= 1 << PHY_CMD_SMI_BUSY;
 493         val |= PHY_CMD_OPCODE_WRITE << PHY_CMD_OPCODE;
 494         val |= (reg << PHY_CMD_REG_ADDR) & PHY_CMD_REG_ADDR_MASK;
 495         val |= (phy << PHY_CMD_DEV_ADDR) & PHY_CMD_DEV_ADDR_MASK;
 496         e6000sw_writereg(sc, REG_GLOBAL2, SMI_PHY_DATA_REG,
 497                          data & PHY_DATA_MASK);
 498         e6000sw_writereg(sc, REG_GLOBAL2, SMI_PHY_CMD_REG, val);
 499         e6000sw_poll_done(sc);
 500
 501         return (0);
 502 }
 503
 504 static int
 505 e6000sw_detach(device_t dev)
 506 {
 507         int phy;
 508         e6000sw_softc_t *sc;
 509
 510         sc = device_get_softc(dev);
 511         bus_generic_detach(dev);
 512         sx_destroy(&sc->sx);
 513         for (phy = 0; phy < sc->num_ports; phy++) {
 514                 if (sc->miibus[phy] != NULL)
 515                         device_delete_child(dev, sc->miibus[phy]);
 516                 if (sc->ifp[phy] != NULL)
 517                         if_free(sc->ifp[phy]);
 518                 if (sc->ifname[phy] != NULL)
 519                         free(sc->ifname[phy], M_E6000SW);
 520         }
 521
 522         return (0);
 523 }
 524
 525 static etherswitch_info_t*
 526 e6000sw_getinfo(device_t dev)
 527 {
 528
 529         return (&etherswitch_info);
 530 }
 531
 532 static void
 533 e6000sw_lock(device_t dev)
 534 {
 535         struct e6000sw_softc *sc;
 536
 537         sc = device_get_softc(dev);
 538
 539         E6000SW_LOCK_ASSERT(sc, SA_UNLOCKED);
 540         E6000SW_LOCK(sc);
 541 }
 542
 543 static void
 544 e6000sw_unlock(device_t dev)
 545 {
 546         struct e6000sw_softc *sc;
 547
 548         sc = device_get_softc(dev);
 549
 550         E6000SW_LOCK_ASSERT(sc, SA_XLOCKED);
 551         E6000SW_UNLOCK(sc);
 552 }
 553
 554 static int
 555 e6000sw_getport(device_t dev, etherswitch_port_t *p)
 556 {
 557         struct mii_data *mii;
 558         int err;
 559         struct ifmediareq *ifmr;
 560
 561         err = 0;
 562         e6000sw_softc_t *sc = device_get_softc(dev);
 563         E6000SW_LOCK_ASSERT(sc, SA_UNLOCKED);
 564
 565         E6000SW_LOCK(sc);
 566
 567         if (p->es_port >= sc->num_ports ||
 568             p->es_port < 0) {
 569                 err = EINVAL;
 570                 goto out;
 571         }
 572
 573         e6000sw_get_pvid(sc, p->es_port, &p->es_pvid);
 574
 575         if (e6000sw_is_cpuport(sc, p->es_port)) {
 576                 p->es_flags |= ETHERSWITCH_PORT_CPU;
 577                 ifmr = &p->es_ifmr;
 578                 ifmr->ifm_status = IFM_ACTIVE | IFM_AVALID;
 579                 ifmr->ifm_count = 0;
 580                 ifmr->ifm_current = ifmr->ifm_active =
 581                     IFM_ETHER | IFM_1000_T | IFM_FDX;
 582                 ifmr->ifm_mask = 0;
 583         } else if (e6000sw_is_fixedport(sc, p->es_port)) {
 584                 ifmr = &p->es_ifmr;
 585                 ifmr->ifm_status = IFM_ACTIVE | IFM_AVALID;
 586                 ifmr->ifm_count = 0;
 587                 ifmr->ifm_current = ifmr->ifm_active =
 588                     IFM_ETHER | IFM_1000_T | IFM_FDX;
 589                 ifmr->ifm_mask = 0;
 590         } else {
 591                 mii = e6000sw_miiforphy(sc, p->es_port);
 592                 err = ifmedia_ioctl(mii->mii_ifp, &p->es_ifr,
 593                     &mii->mii_media, SIOCGIFMEDIA);
 594         }
 595
 596 out:
 597         E6000SW_UNLOCK(sc);
 598         return (err);
 599 }
 600
 601 static int
 602 e6000sw_setport(device_t dev, etherswitch_port_t *p)
 603 {
 604         e6000sw_softc_t *sc;
 605         int err;
 606         struct mii_data *mii;
 607
 608         err = 0;
 609         sc = device_get_softc(dev);
 610         E6000SW_LOCK_ASSERT(sc, SA_UNLOCKED);
 611
 612         E6000SW_LOCK(sc);
 613
 614         if (p->es_port >= sc->num_ports ||
 615             p->es_port < 0) {
 616                 err = EINVAL;
 617                 goto out;
 618         }
 619
 620         if (p->es_pvid != 0)
 621                 e6000sw_set_pvid(sc, p->es_port, p->es_pvid);
 622         if (!e6000sw_is_cpuport(sc, p->es_port)) {
 623                 mii = e6000sw_miiforphy(sc, p->es_port);
 624                 err = ifmedia_ioctl(mii->mii_ifp, &p->es_ifr, &mii->mii_media,
 625                     SIOCSIFMEDIA);
 626         }
 627
 628 out:
 629         E6000SW_UNLOCK(sc);
 630         return (err);
 631 }
 632
 633 /*
 634  * Registers in this switch are divided into sections, specified in
 635  * documentation. So as to access any of them, section index and reg index
 636  * is necessary. etherswitchcfg uses only one variable, so indexes were
 637  * compressed into addr_reg: 32 * section_index + reg_index.
 638  */
 639 static int
 640 e6000sw_readreg_wrapper(device_t dev, int addr_reg)
 641 {
 642
 643         if ((addr_reg > (REG_GLOBAL2 * 32 + REG_NUM_MAX)) ||
 644             (addr_reg < (REG_PORT(0) * 32))) {
 645                 device_printf(dev, "Wrong register address.\n");
 646                 return (EINVAL);
 647         }
 648
 649         return (e6000sw_readreg(device_get_softc(dev), addr_reg / 32,
 650             addr_reg % 32));
 651 }
 652
 653 static int
 654 e6000sw_writereg_wrapper(device_t dev, int addr_reg, int val)
 655 {
 656
 657         if ((addr_reg > (REG_GLOBAL2 * 32 + REG_NUM_MAX)) ||
 658             (addr_reg < (REG_PORT(0) * 32))) {
 659                 device_printf(dev, "Wrong register address.\n");
 660                 return (EINVAL);
 661         }
 662         e6000sw_writereg(device_get_softc(dev), addr_reg / 5,
 663             addr_reg % 32, val);
 664
 665         return (0);
 666 }
 667
 668 /*
 669  * These wrappers are necessary because PHY accesses from etherswitchcfg
 670  * need to be synchronized with locks, while miibus PHY accesses do not.
 671  */
 672 static int
 673 e6000sw_readphy_wrapper(device_t dev, int phy, int reg)
 674 {
 675         e6000sw_softc_t *sc;
 676         int ret;
 677
 678         sc = device_get_softc(dev);
 679         E6000SW_LOCK_ASSERT(sc, SA_UNLOCKED);
 680
 681         E6000SW_LOCK(sc);
 682         ret = e6000sw_readphy(dev, phy, reg);
 683         E6000SW_UNLOCK(sc);
 684
 685         return (ret);
 686 }
 687
 688 static int
 689 e6000sw_writephy_wrapper(device_t dev, int phy, int reg, int data)
 690 {
 691         e6000sw_softc_t *sc;
 692         int ret;
 693
 694         sc = device_get_softc(dev);
 695         E6000SW_LOCK_ASSERT(sc, SA_UNLOCKED);
 696
 697         E6000SW_LOCK(sc);
 698         ret = e6000sw_writephy(dev, phy, reg, data);
 699         E6000SW_UNLOCK(sc);
 700
 701         return (ret);
 702 }
 703
 704 /*
 705  * setvgroup/getvgroup called from etherswitchfcg need to be locked,
 706  * while internal calls do not.
 707  */
 708 static int
 709 e6000sw_setvgroup_wrapper(device_t dev, etherswitch_vlangroup_t *vg)
 710 {
 711         e6000sw_softc_t *sc;
 712         int ret;
 713
 714         sc = device_get_softc(dev);
 715         E6000SW_LOCK_ASSERT(sc, SA_UNLOCKED);
 716
 717         E6000SW_LOCK(sc);
 718         ret = e6000sw_setvgroup(dev, vg);
 719         E6000SW_UNLOCK(sc);
 720
 721         return (ret);
 722 }
 723
 724 static int
 725 e6000sw_getvgroup_wrapper(device_t dev, etherswitch_vlangroup_t *vg)
 726 {
 727         e6000sw_softc_t *sc;
 728         int ret;
 729
 730         sc = device_get_softc(dev);
 731         E6000SW_LOCK_ASSERT(sc, SA_UNLOCKED);
 732
 733         E6000SW_LOCK(sc);
 734         ret = e6000sw_getvgroup(dev, vg);
 735         E6000SW_UNLOCK(sc);
 736
 737         return (ret);
 738 }
 739
 740 static __inline void
 741 e6000sw_flush_port(e6000sw_softc_t *sc, int port)
 742 {
 743         uint32_t reg;
 744
 745         reg = e6000sw_readreg(sc, REG_PORT(port),
 746             PORT_VLAN_MAP);
 747         reg &= ~PORT_VLAN_MAP_TABLE_MASK;
 748         reg &= ~PORT_VLAN_MAP_FID_MASK;
 749         e6000sw_writereg(sc, REG_PORT(port),
 750             PORT_VLAN_MAP, reg);
 751         if (sc->vgroup[port] != E6000SW_PORT_NO_VGROUP) {
 752                 /*
 753                  * If port belonged somewhere, owner-group
 754                  * should have its entry removed.
 755                  */
 756                 sc->members[sc->vgroup[port]] &= ~(1 << port);
 757                 sc->vgroup[port] = E6000SW_PORT_NO_VGROUP;
 758         }
 759 }
 760
 761 static __inline void
 762 e6000sw_port_assign_vgroup(e6000sw_softc_t *sc, int port, int fid, int vgroup,
 763     int members)
 764 {
 765         uint32_t reg;
 766
 767         reg = e6000sw_readreg(sc, REG_PORT(port),
 768             PORT_VLAN_MAP);
 769         reg &= ~PORT_VLAN_MAP_TABLE_MASK;
 770         reg &= ~PORT_VLAN_MAP_FID_MASK;
 771         reg |= members & ~(1 << port);
 772         reg |= (fid << PORT_VLAN_MAP_FID) & PORT_VLAN_MAP_FID_MASK;
 773         e6000sw_writereg(sc, REG_PORT(port), PORT_VLAN_MAP,
 774             reg);
 775         sc->vgroup[port] = vgroup;
 776 }
 777
 778 static int
 779 e6000sw_setvgroup(device_t dev, etherswitch_vlangroup_t *vg)
 780 {
 781         e6000sw_softc_t *sc;
 782         int port, fid;
 783
 784         sc = device_get_softc(dev);
 785         E6000SW_LOCK_ASSERT(sc, SA_XLOCKED);
 786
 787         if (vg->es_vlangroup >= E6000SW_NUM_VGROUPS)
 788                 return (EINVAL);
 789         if (vg->es_member_ports != vg->es_untagged_ports) {
 790                 device_printf(dev, "Tagged ports not supported.\n");
 791                 return (EINVAL);
 792         }
 793
 794         vg->es_untagged_ports &= PORT_VLAN_MAP_TABLE_MASK;
 795         fid = vg->es_vlangroup + 1;
 796         for (port = 0; port < sc->num_ports; port++) {
 797                 if ((sc->members[vg->es_vlangroup] & (1 << port)) ||
 798                     (vg->es_untagged_ports & (1 << port)))
 799                         e6000sw_flush_port(sc, port);
 800                 if (vg->es_untagged_ports & (1 << port))
 801                         e6000sw_port_assign_vgroup(sc, port, fid,
 802                             vg->es_vlangroup, vg->es_untagged_ports);
 803         }
 804         sc->vid[vg->es_vlangroup] = vg->es_vid;
 805         sc->members[vg->es_vlangroup] = vg->es_untagged_ports;
 806
 807         return (0);
 808 }
 809
 810 static int
 811 e6000sw_getvgroup(device_t dev, etherswitch_vlangroup_t *vg)
 812 {
 813         e6000sw_softc_t *sc;
 814
 815         sc = device_get_softc(dev);
 816         E6000SW_LOCK_ASSERT(sc, SA_XLOCKED);
 817
 818         if (vg->es_vlangroup >= E6000SW_NUM_VGROUPS)
 819                 return (EINVAL);
 820         vg->es_untagged_ports = vg->es_member_ports =
 821             sc->members[vg->es_vlangroup];
 822         vg->es_vid = ETHERSWITCH_VID_VALID;
 823
 824         return (0);
 825 }
 826
 827 static __inline struct mii_data*
 828 e6000sw_miiforphy(e6000sw_softc_t *sc, unsigned int phy)
 829 {
 830
 831         if (!e6000sw_is_phyport(sc, phy))
 832                 return (NULL);
 833
 834         return (device_get_softc(sc->miibus[phy]));
 835 }
 836
 837 static int
 838 e6000sw_ifmedia_upd(struct ifnet *ifp)
 839 {
 840         e6000sw_softc_t *sc;
 841         struct mii_data *mii;
 842
 843         sc = ifp->if_softc;
 844         mii = e6000sw_miiforphy(sc, ifp->if_dunit);
 845         if (mii == NULL)
 846                 return (ENXIO);
 847         mii_mediachg(mii);
 848
 849         return (0);
 850 }
 851
 852 static void
 853 e6000sw_ifmedia_sts(struct ifnet *ifp, struct ifmediareq *ifmr)
 854 {
 855         e6000sw_softc_t *sc;
 856         struct mii_data *mii;
 857
 858         sc = ifp->if_softc;
 859         mii = e6000sw_miiforphy(sc, ifp->if_dunit);
 860
 861         if (mii == NULL)
 862                 return;
 863
 864         mii_pollstat(mii);
 865         ifmr->ifm_active = mii->mii_media_active;
 866         ifmr->ifm_status = mii->mii_media_status;
 867 }
 868
 869
 870 static int
 871 e6000sw_smi_waitready(e6000sw_softc_t *sc, int phy)
 872 {
 873         int i;
 874
 875         for (i = 0; i < E6000SW_SMI_TIMEOUT; i++) {
 876                 if ((MDIO_READ(sc->dev, phy, SMI_CMD)
 877                      & SMI_CMD_BUSY) == 0)
 878                         return 0;
 879         }
 880
 881         return 1;
 882 }
 883
 884 static __inline uint32_t
 885 e6000sw_readreg(e6000sw_softc_t *sc, int addr, int reg)
 886 {
 887
 888         E6000SW_LOCK_ASSERT(sc, SA_XLOCKED);
 889
 890         if (!sc->multi_chip)
 891                 return (MDIO_READ(sc->dev, addr, reg) & 0xffff);
 892
 893         if (e6000sw_smi_waitready(sc, sc->sw_addr)) {
 894                 printf("e6000sw: readreg timeout\n");
 895                 return (0xffff);
 896         }
 897         MDIO_WRITE(sc->dev, sc->sw_addr, SMI_CMD, SMI_CMD_OP_READ |
 898                    (addr << 5) | reg);
 899         if (e6000sw_smi_waitready(sc, sc->sw_addr)) {
 900                 printf("e6000sw: readreg timeout\n");
 901                 return (0xffff);
 902         }
 903
 904         return (MDIO_READ(sc->dev, sc->sw_addr, SMI_DATA) & 0xffff);
 905 }
 906
 907 static __inline void
 908 e6000sw_writereg(e6000sw_softc_t *sc, int addr, int reg, int val)
 909 {
 910
 911         E6000SW_LOCK_ASSERT(sc, SA_XLOCKED);
 912
 913         if (!sc->multi_chip) {
 914                 MDIO_WRITE(sc->dev, addr, reg, val);
 915                 return;
 916         }
 917
 918         if (e6000sw_smi_waitready(sc, sc->sw_addr)) {
 919                 printf("e6000sw: readreg timeout\n");
 920                 return;
 921         }
 922         MDIO_WRITE(sc->dev, sc->sw_addr, SMI_DATA, val);
 923         MDIO_WRITE(sc->dev, sc->sw_addr, SMI_CMD, SMI_CMD_OP_WRITE |
 924                    (addr << 5) | reg);
 925         if (e6000sw_smi_waitready(sc, sc->sw_addr)) {
 926                 printf("e6000sw: readreg timeout\n");
 927                 return;
 928         }
 929
 930         return;
 931 }
 932
 933 static __inline int
 934 e6000sw_is_cpuport(e6000sw_softc_t *sc, int port)
 935 {
 936
 937         return (sc->cpuports_mask & (1 << port));
 938 }
 939
 940 static __inline int
 941 e6000sw_is_fixedport(e6000sw_softc_t *sc, int port)
 942 {
 943
 944         return (sc->fixed_mask & (1 << port));
 945 }
 946
 947 static __inline int
 948 e6000sw_is_phyport(e6000sw_softc_t *sc, int port)
 949 {
 950         uint32_t phy_mask;
 951         phy_mask = ~(sc->fixed_mask | sc->cpuports_mask);
 952
 953         return (phy_mask & (1 << port));
 954 }
 955
 956 static __inline int
 957 e6000sw_set_pvid(e6000sw_softc_t *sc, int port, int pvid)
 958 {
 959
 960         e6000sw_writereg(sc, REG_PORT(port), PORT_VID, pvid &
 961             PORT_VID_DEF_VID_MASK);
 962
 963         return (0);
 964 }
 965
 966 static __inline int
 967 e6000sw_get_pvid(e6000sw_softc_t *sc, int port, int *pvid)
 968 {
 969
 970         if (pvid == NULL)
 971                 return (ENXIO);
 972
 973         *pvid = e6000sw_readreg(sc, REG_PORT(port), PORT_VID) &
 974             PORT_VID_DEF_VID_MASK;
 975
 976         return (0);
 977 }
 978
 979 static void
 980 e6000sw_tick (void *arg)
 981 {
 982         e6000sw_softc_t *sc;
 983         struct mii_softc *miisc;
 984         int port;
 985
 986         sc = arg;
 987
 988         E6000SW_LOCK_ASSERT(sc, SA_UNLOCKED);
 989         for (;;) {
 990                 E6000SW_LOCK(sc);
 991                 for (port = 0; port < sc->num_ports; port++) {
 992                         /* Tick only on PHY ports */
 993                         if (!e6000sw_is_phyport(sc, port))
 994                                 continue;
 995                         mii_tick(sc->mii[port]);
 996                         LIST_FOREACH(miisc, &sc->mii[port]->mii_phys, mii_list) {
 997                                 if (IFM_INST(sc->mii[port]->mii_media.ifm_cur->ifm_media)
 998                                     != miisc->mii_inst)
 999                                         continue;
1000                                 mii_phy_update(miisc, MII_POLLSTAT);
1001                         }
1002                 }
1003                 E6000SW_UNLOCK(sc);
1004                 pause("e6000sw tick", 1000);
1005         }
1006 }
1007
1008 static void
1009 e6000sw_setup(device_t dev, e6000sw_softc_t *sc)
1010 {
1011         uint16_t atu_ctrl, atu_age;
1012
1013         /* Set aging time */
1014         e6000sw_writereg(sc, REG_GLOBAL, ATU_CONTROL,
1015             (E6000SW_DEFAULT_AGETIME << ATU_CONTROL_AGETIME) |
1016             (1 << ATU_CONTROL_LEARN2ALL));
1017
1018         /* Send all with specific mac address to cpu port */
1019         e6000sw_writereg(sc, REG_GLOBAL2, MGMT_EN_2x, MGMT_EN_ALL);
1020         e6000sw_writereg(sc, REG_GLOBAL2, MGMT_EN_0x, MGMT_EN_ALL);
1021
1022         /* Disable Remote Management */
1023         e6000sw_writereg(sc, REG_GLOBAL, SWITCH_GLOBAL_CONTROL2, 0);
1024
1025         /* Disable loopback filter and flow control messages */
1026         e6000sw_writereg(sc, REG_GLOBAL2, SWITCH_MGMT,
1027             SWITCH_MGMT_PRI_MASK |
1028             (1 << SWITCH_MGMT_RSVD2CPU) |
1029             SWITCH_MGMT_FC_PRI_MASK |
1030             (1 << SWITCH_MGMT_FORCEFLOW));
1031
1032         e6000sw_atu_flush(dev, sc, NO_OPERATION);
1033         e6000sw_atu_mac_table(dev, sc, NULL, NO_OPERATION);
1034         e6000sw_set_atustat(dev, sc, 0, COUNT_ALL);
1035
1036         /* Set ATU AgeTime to 15 seconds */
1037         atu_age = 1;
1038
1039         atu_ctrl = e6000sw_readreg(sc, REG_GLOBAL, ATU_CONTROL);
1040
1041         /* Set new AgeTime field */
1042         atu_ctrl &= ~ATU_CONTROL_AGETIME_MASK;
1043         e6000sw_writereg(sc, REG_GLOBAL, ATU_CONTROL, atu_ctrl |
1044             (atu_age << ATU_CONTROL_AGETIME));
1045 }
1046
1047 static void
1048 e6000sw_port_vlan_conf(e6000sw_softc_t *sc)
1049 {
1050         int port, ret;
1051         device_t dev;
1052
1053         dev = sc->dev;
1054         /* Disable all ports */
1055         for (port = 0; port < sc->num_ports; port++) {
1056                 ret = e6000sw_readreg(sc, REG_PORT(port), PORT_CONTROL);
1057                 e6000sw_writereg(sc, REG_PORT(port), PORT_CONTROL,
1058                     (ret & ~PORT_CONTROL_ENABLE));
1059         }
1060
1061         /* Set port priority */
1062         for (port = 0; port < sc->num_ports; port++) {
1063                 ret = e6000sw_readreg(sc, REG_PORT(port), PORT_VID);
1064                 ret &= ~PORT_VID_PRIORITY_MASK;
1065                 e6000sw_writereg(sc, REG_PORT(port), PORT_VID, ret);
1066         }
1067
1068         /* Set VID map */
1069         for (port = 0; port < sc->num_ports; port++) {
1070                 ret = e6000sw_readreg(sc, REG_PORT(port), PORT_VID);
1071                 ret &= ~PORT_VID_DEF_VID_MASK;
1072                 ret |= (port + 1);
1073                 e6000sw_writereg(sc, REG_PORT(port), PORT_VID, ret);
1074         }
1075
1076         /* Enable all ports */
1077         for (port = 0; port < sc->num_ports; port++) {
1078                 ret = e6000sw_readreg(sc, REG_PORT(port), PORT_CONTROL);
1079                 e6000sw_writereg(sc, REG_PORT(port), PORT_CONTROL, (ret |
1080                     PORT_CONTROL_ENABLE));
1081         }
1082 }
1083
1084 static void
1085 e6000sw_set_atustat(device_t dev, e6000sw_softc_t *sc, int bin, int flag)
1086 {
1087         uint16_t ret;
1088
1089         ret = e6000sw_readreg(sc, REG_GLOBAL2, ATU_STATS);
1090         e6000sw_writereg(sc, REG_GLOBAL2, ATU_STATS, (bin << ATU_STATS_BIN ) |
1091             (flag << ATU_STATS_FLAG));
1092 }
1093
1094 static int
1095 e6000sw_atu_mac_table(device_t dev, e6000sw_softc_t *sc, struct atu_opt *atu,
1096     int flag)
1097 {
1098         uint16_t ret_opt;
1099         uint16_t ret_data;
1100         int retries;
1101
1102         if (flag == NO_OPERATION)
1103                 return (0);
1104         else if ((flag & (LOAD_FROM_FIB | PURGE_FROM_FIB | GET_NEXT_IN_FIB |
1105             GET_VIOLATION_DATA | CLEAR_VIOLATION_DATA)) == 0) {
1106                 device_printf(dev, "Wrong Opcode for ATU operation\n");
1107                 return (EINVAL);
1108         }
1109
1110         ret_opt = e6000sw_readreg(sc, REG_GLOBAL, ATU_OPERATION);
1111
1112         if (ret_opt & ATU_UNIT_BUSY) {
1113                 device_printf(dev, "ATU unit is busy, cannot access"
1114                     "register\n");
1115                 return (EBUSY);
1116         } else {
1117                 if(flag & LOAD_FROM_FIB) {
1118                         ret_data = e6000sw_readreg(sc, REG_GLOBAL, ATU_DATA);
1119                         e6000sw_writereg(sc, REG_GLOBAL2, ATU_DATA, (ret_data &
1120                             ~ENTRY_STATE));
1121                 }
1122                 e6000sw_writereg(sc, REG_GLOBAL, ATU_MAC_ADDR01, atu->mac_01);
1123                 e6000sw_writereg(sc, REG_GLOBAL, ATU_MAC_ADDR23, atu->mac_23);
1124                 e6000sw_writereg(sc, REG_GLOBAL, ATU_MAC_ADDR45, atu->mac_45);
1125                 e6000sw_writereg(sc, REG_GLOBAL, ATU_FID, atu->fid);
1126
1127                 e6000sw_writereg(sc, REG_GLOBAL, ATU_OPERATION, (ret_opt |
1128                     ATU_UNIT_BUSY | flag));
1129
1130                 retries = E6000SW_RETRIES;
1131                 while (--retries & (e6000sw_readreg(sc, REG_GLOBAL,
1132                     ATU_OPERATION) & ATU_UNIT_BUSY))
1133                         DELAY(1);
1134
1135                 if (retries == 0)
1136                         device_printf(dev, "Timeout while flushing\n");
1137                 else if (flag & GET_NEXT_IN_FIB) {
1138                         atu->mac_01 = e6000sw_readreg(sc, REG_GLOBAL,
1139                             ATU_MAC_ADDR01);
1140                         atu->mac_23 = e6000sw_readreg(sc, REG_GLOBAL,
1141                             ATU_MAC_ADDR23);
1142                         atu->mac_45 = e6000sw_readreg(sc, REG_GLOBAL,
1143                             ATU_MAC_ADDR45);
1144                 }
1145         }
1146
1147         return (0);
1148 }
1149
1150 static int
1151 e6000sw_atu_flush(device_t dev, e6000sw_softc_t *sc, int flag)
1152 {
1153         uint16_t ret;
1154         int retries;
1155
1156         if (flag == NO_OPERATION)
1157                 return (0);
1158
1159         ret = e6000sw_readreg(sc, REG_GLOBAL, ATU_OPERATION);
1160         if (ret & ATU_UNIT_BUSY) {
1161                 device_printf(dev, "Atu unit is busy, cannot flush\n");
1162                 return (EBUSY);
1163         } else {
1164                 e6000sw_writereg(sc, REG_GLOBAL, ATU_OPERATION, (ret |
1165                     ATU_UNIT_BUSY | flag));
1166                 retries = E6000SW_RETRIES;
1167                 while (--retries & (e6000sw_readreg(sc, REG_GLOBAL,
1168                     ATU_OPERATION) & ATU_UNIT_BUSY))
1169                         DELAY(1);
1170
1171                 if (retries == 0)
1172                         device_printf(dev, "Timeout while flushing\n");
1173         }
1174
1175         return (0);
1176 }