sys/dev/netif/sk/if_sk.c

   1 /*
   2  * Copyright (c) 1997, 1998, 1999, 2000
   3  *      Bill Paul <wpaul@ctr.columbia.edu>.  All rights reserved.
   4  *
   5  * Redistribution and use in source and binary forms, with or without
   6  * modification, are permitted provided that the following conditions
   7  * are met:
   8  * 1. Redistributions of source code must retain the above copyright
   9  *    notice, this list of conditions and the following disclaimer.
  10  * 2. Redistributions in binary form must reproduce the above copyright
  11  *    notice, this list of conditions and the following disclaimer in the
  12  *    documentation and/or other materials provided with the distribution.
  13  * 3. All advertising materials mentioning features or use of this software
  14  *    must display the following acknowledgement:
  15  *      This product includes software developed by Bill Paul.
  16  * 4. Neither the name of the author nor the names of any co-contributors
  17  *    may be used to endorse or promote products derived from this software
  18  *    without specific prior written permission.
  19  *
  20  * THIS SOFTWARE IS PROVIDED BY Bill Paul AND CONTRIBUTORS ``AS IS'' AND
  21  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
  22  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
  23  * ARE DISCLAIMED.  IN NO EVENT SHALL Bill Paul OR THE VOICES IN HIS HEAD
  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
  30  * THE POSSIBILITY OF SUCH DAMAGE.
  31  *
  32  * $OpenBSD: if_sk.c,v 1.129 2006/10/16 12:30:08 tom Exp $
  33  * $FreeBSD: /c/ncvs/src/sys/pci/if_sk.c,v 1.20 2000/04/22 02:16:37 wpaul Exp $
  34  */
  35
  36 /*
  37  * Copyright (c) 2003 Nathan L. Binkert <binkertn@umich.edu>
  38  *
  39  * Permission to use, copy, modify, and distribute this software for any
  40  * purpose with or without fee is hereby granted, provided that the above
  41  * copyright notice and this permission notice appear in all copies.
  42  *
  43  * THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
  44  * WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
  45  * MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
  46  * ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
  47  * WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
  48  * ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
  49  * OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
  50  */
  51
  52 /*
  53  * SysKonnect SK-NET gigabit ethernet driver for FreeBSD. Supports
  54  * the SK-984x series adapters, both single port and dual port.
  55  * References:
  56  *      The XaQti XMAC II datasheet,
  57  * http://www.freebsd.org/~wpaul/SysKonnect/xmacii_datasheet_rev_c_9-29.pdf
  58  *      The SysKonnect GEnesis manual, http://www.syskonnect.com
  59  *
  60  * Note: XaQti has been acquired by Vitesse, and Vitesse does not have the
  61  * XMAC II datasheet online. I have put my copy at people.freebsd.org as a
  62  * convenience to others until Vitesse corrects this problem:
  63  *
  64  * http://people.freebsd.org/~wpaul/SysKonnect/xmacii_datasheet_rev_c_9-29.pdf
  65  *
  66  * Written by Bill Paul <wpaul@ee.columbia.edu>
  67  * Department of Electrical Engineering
  68  * Columbia University, New York City
  69  */
  70
  71 /*
  72  * The SysKonnect gigabit ethernet adapters consist of two main
  73  * components: the SysKonnect GEnesis controller chip and the XaQti Corp.
  74  * XMAC II gigabit ethernet MAC. The XMAC provides all of the MAC
  75  * components and a PHY while the GEnesis controller provides a PCI
  76  * interface with DMA support. Each card may have between 512K and
  77  * 2MB of SRAM on board depending on the configuration.
  78  *
  79  * The SysKonnect GEnesis controller can have either one or two XMAC
  80  * chips connected to it, allowing single or dual port NIC configurations.
  81  * SysKonnect has the distinction of being the only vendor on the market
  82  * with a dual port gigabit ethernet NIC. The GEnesis provides dual FIFOs,
  83  * dual DMA queues, packet/MAC/transmit arbiters and direct access to the
  84  * XMAC registers. This driver takes advantage of these features to allow
  85  * both XMACs to operate as independent interfaces.
  86  */
  87
  88 #include <sys/param.h>
  89 #include <sys/bus.h>
  90 #include <sys/endian.h>
  91 #include <sys/in_cksum.h>
  92 #include <sys/kernel.h>
  93 #include <sys/interrupt.h>
  94 #include <sys/mbuf.h>
  95 #include <sys/malloc.h>
  96 #include <sys/queue.h>
  97 #include <sys/rman.h>
  98 #include <sys/serialize.h>
  99 #include <sys/socket.h>
 100 #include <sys/sockio.h>
 101 #include <sys/sysctl.h>
 102
 103 #include <net/bpf.h>
 104 #include <net/ethernet.h>
 105 #include <net/if.h>
 106 #include <net/if_arp.h>
 107 #include <net/if_dl.h>
 108 #include <net/if_media.h>
 109 #include <net/ifq_var.h>
 110 #include <net/vlan/if_vlan_var.h>
 111
 112 #include <netinet/ip.h>
 113 #include <netinet/udp.h>
 114
 115 #include <dev/netif/mii_layer/mii.h>
 116 #include <dev/netif/mii_layer/miivar.h>
 117 #include <dev/netif/mii_layer/brgphyreg.h>
 118
 119 #include <bus/pci/pcireg.h>
 120 #include <bus/pci/pcivar.h>
 121 #include <bus/pci/pcidevs.h>
 122
 123 #include <dev/netif/sk/if_skreg.h>
 124 #include <dev/netif/sk/yukonreg.h>
 125 #include <dev/netif/sk/xmaciireg.h>
 126 #include <dev/netif/sk/if_skvar.h>
 127
 128 #include "miibus_if.h"
 129
 130 #if 0
 131 #define SK_DEBUG
 132 #endif
 133
 134 #if 0
 135 #define SK_RXCSUM
 136 #endif
 137
 138 /* supported device vendors */
 139 static const struct skc_type {
 140         uint16_t        skc_vid;
 141         uint16_t        skc_did;
 142         const char      *skc_name;
 143 } skc_devs[] = {
 144         { PCI_VENDOR_3COM,              PCI_PRODUCT_3COM_3C940,
 145           "3Com 3C940" },
 146         { PCI_VENDOR_3COM,              PCI_PRODUCT_3COM_3C940B,
 147           "3Com 3C940B" },
 148
 149         { PCI_VENDOR_CNET,              PCI_PRODUCT_CNET_GIGACARD,
 150           "CNet GigaCard" },
 151
 152         { PCI_VENDOR_DLINK,             PCI_PRODUCT_DLINK_DGE530T_A1,
 153           "D-Link DGE-530T A1" },
 154         { PCI_VENDOR_DLINK,             PCI_PRODUCT_DLINK_DGE530T_B1,
 155           "D-Link DGE-530T B1" },
 156
 157         { PCI_VENDOR_LINKSYS,           PCI_PRODUCT_LINKSYS_EG1032,
 158           "Linksys EG1032 v2" },
 159         { PCI_VENDOR_LINKSYS,           PCI_PRODUCT_LINKSYS_EG1064,
 160           "Linksys EG1064" },
 161
 162         { PCI_VENDOR_MARVELL,           PCI_PRODUCT_MARVELL_YUKON,
 163           "Marvell Yukon 88E8001/8003/8010" },
 164         { PCI_VENDOR_MARVELL,           PCI_PRODUCT_MARVELL_YUKON_BELKIN,
 165           "Belkin F5D5005" },
 166
 167         { PCI_VENDOR_SCHNEIDERKOCH,     PCI_PRODUCT_SCHNEIDERKOCH_SKNET_GE,
 168           "SysKonnect SK-NET" },
 169         { PCI_VENDOR_SCHNEIDERKOCH,     PCI_PRODUCT_SCHNEIDERKOCH_SK9821v2,
 170           "SysKonnect SK9821 v2" },
 171
 172         { 0, 0, NULL }
 173 };
 174
 175 static int      skc_probe(device_t);
 176 static int      skc_attach(device_t);
 177 static int      skc_detach(device_t);
 178 static void     skc_shutdown(device_t);
 179 static int      skc_sysctl_imtime(SYSCTL_HANDLER_ARGS);
 180
 181 static int      sk_probe(device_t);
 182 static int      sk_attach(device_t);
 183 static int      sk_detach(device_t);
 184 static void     sk_tick(void *);
 185 static void     sk_yukon_tick(void *);
 186 static void     sk_intr(void *);
 187 static void     sk_intr_bcom(struct sk_if_softc *);
 188 static void     sk_intr_xmac(struct sk_if_softc *);
 189 static void     sk_intr_yukon(struct sk_if_softc *);
 190 static void     sk_rxeof(struct sk_if_softc *);
 191 static void     sk_txeof(struct sk_if_softc *);
 192 static int      sk_encap(struct sk_if_softc *, struct mbuf **, uint32_t *);
 193 static void     sk_start(struct ifnet *);
 194 static int      sk_ioctl(struct ifnet *, u_long, caddr_t, struct ucred *);
 195 static void     sk_init(void *);
 196 static void     sk_init_xmac(struct sk_if_softc *);
 197 static void     sk_init_yukon(struct sk_if_softc *);
 198 static void     sk_stop(struct sk_if_softc *);
 199 static void     sk_watchdog(struct ifnet *);
 200 static int      sk_ifmedia_upd(struct ifnet *);
 201 static void     sk_ifmedia_sts(struct ifnet *, struct ifmediareq *);
 202 static void     sk_reset(struct sk_softc *);
 203 static int      sk_newbuf_jumbo(struct sk_if_softc *, int, int);
 204 static int      sk_newbuf_std(struct sk_if_softc *, int, int);
 205 static int      sk_jpool_alloc(device_t);
 206 static void     sk_jpool_free(struct sk_if_softc *);
 207 static struct sk_jpool_entry
 208                 *sk_jalloc(struct sk_if_softc *);
 209 static void     sk_jfree(void *);
 210 static void     sk_jref(void *);
 211 static int      sk_init_rx_ring(struct sk_if_softc *);
 212 static int      sk_init_tx_ring(struct sk_if_softc *);
 213
 214 static int      sk_miibus_readreg(device_t, int, int);
 215 static int      sk_miibus_writereg(device_t, int, int, int);
 216 static void     sk_miibus_statchg(device_t);
 217
 218 static int      sk_xmac_miibus_readreg(struct sk_if_softc *, int, int);
 219 static int      sk_xmac_miibus_writereg(struct sk_if_softc *, int, int, int);
 220 static void     sk_xmac_miibus_statchg(struct sk_if_softc *);
 221
 222 static int      sk_marv_miibus_readreg(struct sk_if_softc *, int, int);
 223 static int      sk_marv_miibus_writereg(struct sk_if_softc *, int, int, int);
 224 static void     sk_marv_miibus_statchg(struct sk_if_softc *);
 225
 226 static void     sk_setfilt(struct sk_if_softc *, caddr_t, int);
 227 static void     sk_setmulti(struct sk_if_softc *);
 228 static void     sk_setpromisc(struct sk_if_softc *);
 229
 230 #ifdef SK_RXCSUM
 231 static void     sk_rxcsum(struct ifnet *, struct mbuf *, const uint16_t,
 232                           const uint16_t);
 233 #endif
 234 static int      sk_dma_alloc(device_t);
 235 static void     sk_dma_free(device_t);
 236
 237 #ifdef SK_DEBUG
 238 #define DPRINTF(x)      if (skdebug) kprintf x
 239 #define DPRINTFN(n,x)   if (skdebug >= (n)) kprintf x
 240 static int      skdebug = 2;
 241
 242 static void     sk_dump_txdesc(struct sk_tx_desc *, int);
 243 static void     sk_dump_mbuf(struct mbuf *);
 244 static void     sk_dump_bytes(const char *, int);
 245 #else
 246 #define DPRINTF(x)
 247 #define DPRINTFN(n,x)
 248 #endif
 249
 250 /* Interrupt moderation time. */
 251 static int      skc_imtime = SK_IMTIME_DEFAULT;
 252 TUNABLE_INT("hw.skc.imtime", &skc_imtime);
 253
 254 /*
 255  * Note that we have newbus methods for both the GEnesis controller
 256  * itself and the XMAC(s). The XMACs are children of the GEnesis, and
 257  * the miibus code is a child of the XMACs. We need to do it this way
 258  * so that the miibus drivers can access the PHY registers on the
 259  * right PHY. It's not quite what I had in mind, but it's the only
 260  * design that achieves the desired effect.
 261  */
 262 static device_method_t skc_methods[] = {
 263         /* Device interface */
 264         DEVMETHOD(device_probe,         skc_probe),
 265         DEVMETHOD(device_attach,        skc_attach),
 266         DEVMETHOD(device_detach,        skc_detach),
 267         DEVMETHOD(device_shutdown,      skc_shutdown),
 268
 269         /* bus interface */
 270         DEVMETHOD(bus_print_child,      bus_generic_print_child),
 271         DEVMETHOD(bus_driver_added,     bus_generic_driver_added),
 272
 273         { 0, 0 }
 274 };
 275
 276 static DEFINE_CLASS_0(skc, skc_driver, skc_methods, sizeof(struct sk_softc));
 277 static devclass_t skc_devclass;
 278
 279 static device_method_t sk_methods[] = {
 280         /* Device interface */
 281         DEVMETHOD(device_probe,         sk_probe),
 282         DEVMETHOD(device_attach,        sk_attach),
 283         DEVMETHOD(device_detach,        sk_detach),
 284         DEVMETHOD(device_shutdown,      bus_generic_shutdown),
 285
 286         /* bus interface */
 287         DEVMETHOD(bus_print_child,      bus_generic_print_child),
 288         DEVMETHOD(bus_driver_added,     bus_generic_driver_added),
 289
 290         /* MII interface */
 291         DEVMETHOD(miibus_readreg,       sk_miibus_readreg),
 292         DEVMETHOD(miibus_writereg,      sk_miibus_writereg),
 293         DEVMETHOD(miibus_statchg,       sk_miibus_statchg),
 294
 295         { 0, 0 }
 296 };
 297
 298 static DEFINE_CLASS_0(sk, sk_driver, sk_methods, sizeof(struct sk_if_softc));
 299 static devclass_t sk_devclass;
 300
 301 DECLARE_DUMMY_MODULE(if_sk);
 302 DRIVER_MODULE(if_sk, pci, skc_driver, skc_devclass, NULL, NULL);
 303 DRIVER_MODULE(if_sk, skc, sk_driver, sk_devclass, NULL, NULL);
 304 DRIVER_MODULE(miibus, sk, miibus_driver, miibus_devclass, NULL, NULL);
 305
 306 static __inline uint32_t
 307 sk_win_read_4(struct sk_softc *sc, uint32_t reg)
 308 {
 309         return CSR_READ_4(sc, reg);
 310 }
 311
 312 static __inline uint16_t
 313 sk_win_read_2(struct sk_softc *sc, uint32_t reg)
 314 {
 315         return CSR_READ_2(sc, reg);
 316 }
 317
 318 static __inline uint8_t
 319 sk_win_read_1(struct sk_softc *sc, uint32_t reg)
 320 {
 321         return CSR_READ_1(sc, reg);
 322 }
 323
 324 static __inline void
 325 sk_win_write_4(struct sk_softc *sc, uint32_t reg, uint32_t x)
 326 {
 327         CSR_WRITE_4(sc, reg, x);
 328 }
 329
 330 static __inline void
 331 sk_win_write_2(struct sk_softc *sc, uint32_t reg, uint16_t x)
 332 {
 333         CSR_WRITE_2(sc, reg, x);
 334 }
 335
 336 static __inline void
 337 sk_win_write_1(struct sk_softc *sc, uint32_t reg, uint8_t x)
 338 {
 339         CSR_WRITE_1(sc, reg, x);
 340 }
 341
 342 static __inline int
 343 sk_newbuf(struct sk_if_softc *sc_if, int idx, int wait)
 344 {
 345         int ret;
 346
 347         if (sc_if->sk_use_jumbo)
 348                 ret = sk_newbuf_jumbo(sc_if, idx, wait);
 349         else
 350                 ret = sk_newbuf_std(sc_if, idx, wait);
 351         return ret;
 352 }
 353
 354 static int
 355 sk_miibus_readreg(device_t dev, int phy, int reg)
 356 {
 357         struct sk_if_softc *sc_if = device_get_softc(dev);
 358
 359         if (SK_IS_GENESIS(sc_if->sk_softc))
 360                 return sk_xmac_miibus_readreg(sc_if, phy, reg);
 361         else
 362                 return sk_marv_miibus_readreg(sc_if, phy, reg);
 363 }
 364
 365 static int
 366 sk_miibus_writereg(device_t dev, int phy, int reg, int val)
 367 {
 368         struct sk_if_softc *sc_if = device_get_softc(dev);
 369
 370         if (SK_IS_GENESIS(sc_if->sk_softc))
 371                 return sk_xmac_miibus_writereg(sc_if, phy, reg, val);
 372         else
 373                 return sk_marv_miibus_writereg(sc_if, phy, reg, val);
 374 }
 375
 376 static void
 377 sk_miibus_statchg(device_t dev)
 378 {
 379         struct sk_if_softc *sc_if = device_get_softc(dev);
 380
 381         if (SK_IS_GENESIS(sc_if->sk_softc))
 382                 sk_xmac_miibus_statchg(sc_if);
 383         else
 384                 sk_marv_miibus_statchg(sc_if);
 385 }
 386
 387 static int
 388 sk_xmac_miibus_readreg(struct sk_if_softc *sc_if, int phy, int reg)
 389 {
 390         int i;
 391
 392         DPRINTFN(9, ("sk_xmac_miibus_readreg\n"));
 393
 394         if (sc_if->sk_phytype == SK_PHYTYPE_XMAC && phy != 0)
 395                 return(0);
 396
 397         SK_XM_WRITE_2(sc_if, XM_PHY_ADDR, reg|(phy << 8));
 398         SK_XM_READ_2(sc_if, XM_PHY_DATA);
 399         if (sc_if->sk_phytype != SK_PHYTYPE_XMAC) {
 400                 for (i = 0; i < SK_TIMEOUT; i++) {
 401                         DELAY(1);
 402                         if (SK_XM_READ_2(sc_if, XM_MMUCMD) &
 403                             XM_MMUCMD_PHYDATARDY)
 404                                 break;
 405                 }
 406
 407                 if (i == SK_TIMEOUT) {
 408                         if_printf(&sc_if->arpcom.ac_if,
 409                                   "phy failed to come ready\n");
 410                         return(0);
 411                 }
 412         }
 413         DELAY(1);
 414         return(SK_XM_READ_2(sc_if, XM_PHY_DATA));
 415 }
 416
 417 static int
 418 sk_xmac_miibus_writereg(struct sk_if_softc *sc_if, int phy, int reg, int val)
 419 {
 420         int i;
 421
 422         DPRINTFN(9, ("sk_xmac_miibus_writereg\n"));
 423
 424         SK_XM_WRITE_2(sc_if, XM_PHY_ADDR, reg|(phy << 8));
 425         for (i = 0; i < SK_TIMEOUT; i++) {
 426                 if ((SK_XM_READ_2(sc_if, XM_MMUCMD) & XM_MMUCMD_PHYBUSY) == 0)
 427                         break;
 428         }
 429
 430         if (i == SK_TIMEOUT) {
 431                 if_printf(&sc_if->arpcom.ac_if, "phy failed to come ready\n");
 432                 return(ETIMEDOUT);
 433         }
 434
 435         SK_XM_WRITE_2(sc_if, XM_PHY_DATA, val);
 436         for (i = 0; i < SK_TIMEOUT; i++) {
 437                 DELAY(1);
 438                 if ((SK_XM_READ_2(sc_if, XM_MMUCMD) & XM_MMUCMD_PHYBUSY) == 0)
 439                         break;
 440         }
 441
 442         if (i == SK_TIMEOUT)
 443                 if_printf(&sc_if->arpcom.ac_if, "phy write timed out\n");
 444         return(0);
 445 }
 446
 447 static void
 448 sk_xmac_miibus_statchg(struct sk_if_softc *sc_if)
 449 {
 450         struct mii_data *mii;
 451
 452         mii = device_get_softc(sc_if->sk_miibus);
 453         DPRINTFN(9, ("sk_xmac_miibus_statchg\n"));
 454
 455         /*
 456          * If this is a GMII PHY, manually set the XMAC's
 457          * duplex mode accordingly.
 458          */
 459         if (sc_if->sk_phytype != SK_PHYTYPE_XMAC) {
 460                 if ((mii->mii_media_active & IFM_GMASK) == IFM_FDX)
 461                         SK_XM_SETBIT_2(sc_if, XM_MMUCMD, XM_MMUCMD_GMIIFDX);
 462                 else
 463                         SK_XM_CLRBIT_2(sc_if, XM_MMUCMD, XM_MMUCMD_GMIIFDX);
 464         }
 465 }
 466
 467 static int
 468 sk_marv_miibus_readreg(struct sk_if_softc *sc_if, int phy, int reg)
 469 {
 470         uint16_t val;
 471         int i;
 472
 473         if (phy != 0 ||
 474             (sc_if->sk_phytype != SK_PHYTYPE_MARV_COPPER &&
 475              sc_if->sk_phytype != SK_PHYTYPE_MARV_FIBER)) {
 476                 DPRINTFN(9, ("sk_marv_miibus_readreg (skip) phy=%d, reg=%#x\n",
 477                              phy, reg));
 478                 return(0);
 479         }
 480
 481         SK_YU_WRITE_2(sc_if, YUKON_SMICR, YU_SMICR_PHYAD(phy) |
 482                       YU_SMICR_REGAD(reg) | YU_SMICR_OP_READ);
 483
 484         for (i = 0; i < SK_TIMEOUT; i++) {
 485                 DELAY(1);
 486                 val = SK_YU_READ_2(sc_if, YUKON_SMICR);
 487                 if (val & YU_SMICR_READ_VALID)
 488                         break;
 489         }
 490
 491         if (i == SK_TIMEOUT) {
 492                 if_printf(&sc_if->arpcom.ac_if, "phy failed to come ready\n");
 493                 return(0);
 494         }
 495
 496         DPRINTFN(9, ("sk_marv_miibus_readreg: i=%d, timeout=%d\n", i,
 497                      SK_TIMEOUT));
 498
 499         val = SK_YU_READ_2(sc_if, YUKON_SMIDR);
 500
 501         DPRINTFN(9, ("sk_marv_miibus_readreg phy=%d, reg=%#x, val=%#x\n",
 502                      phy, reg, val));
 503
 504         return(val);
 505 }
 506
 507 static int
 508 sk_marv_miibus_writereg(struct sk_if_softc *sc_if, int phy, int reg, int val)
 509 {
 510         int i;
 511
 512         DPRINTFN(9, ("sk_marv_miibus_writereg phy=%d reg=%#x val=%#x\n",
 513                      phy, reg, val));
 514
 515         SK_YU_WRITE_2(sc_if, YUKON_SMIDR, val);
 516         SK_YU_WRITE_2(sc_if, YUKON_SMICR, YU_SMICR_PHYAD(phy) |
 517                       YU_SMICR_REGAD(reg) | YU_SMICR_OP_WRITE);
 518
 519         for (i = 0; i < SK_TIMEOUT; i++) {
 520                 DELAY(1);
 521                 if (SK_YU_READ_2(sc_if, YUKON_SMICR) & YU_SMICR_BUSY)
 522                         break;
 523         }
 524
 525         if (i == SK_TIMEOUT)
 526                 if_printf(&sc_if->arpcom.ac_if, "phy write timed out\n");
 527
 528         return(0);
 529 }
 530
 531 static void
 532 sk_marv_miibus_statchg(struct sk_if_softc *sc_if)
 533 {
 534         DPRINTFN(9, ("sk_marv_miibus_statchg: gpcr=%x\n",
 535                      SK_YU_READ_2(sc_if, YUKON_GPCR)));
 536 }
 537
 538 #define HASH_BITS       6
 539
 540 static uint32_t
 541 sk_xmac_hash(caddr_t addr)
 542 {
 543         uint32_t crc;
 544
 545         crc = ether_crc32_le(addr, ETHER_ADDR_LEN);
 546         return (~crc & ((1 << HASH_BITS) - 1));
 547 }
 548
 549 static uint32_t
 550 sk_yukon_hash(caddr_t addr)
 551 {
 552         uint32_t crc;
 553
 554         crc = ether_crc32_be(addr, ETHER_ADDR_LEN);
 555         return (crc & ((1 << HASH_BITS) - 1));
 556 }
 557
 558 static void
 559 sk_setfilt(struct sk_if_softc *sc_if, caddr_t addr, int slot)
 560 {
 561         int base;
 562
 563         base = XM_RXFILT_ENTRY(slot);
 564
 565         SK_XM_WRITE_2(sc_if, base, *(uint16_t *)(&addr[0]));
 566         SK_XM_WRITE_2(sc_if, base + 2, *(uint16_t *)(&addr[2]));
 567         SK_XM_WRITE_2(sc_if, base + 4, *(uint16_t *)(&addr[4]));
 568 }
 569
 570 static void
 571 sk_setmulti(struct sk_if_softc *sc_if)
 572 {
 573         struct sk_softc *sc = sc_if->sk_softc;
 574         struct ifnet *ifp = &sc_if->arpcom.ac_if;
 575         uint32_t hashes[2] = { 0, 0 };
 576         int h = 0, i;
 577         struct ifmultiaddr *ifma;
 578         uint8_t dummy[] = { 0, 0, 0, 0, 0 ,0 };
 579
 580         /* First, zot all the existing filters. */
 581         switch(sc->sk_type) {
 582         case SK_GENESIS:
 583                 for (i = 1; i < XM_RXFILT_MAX; i++)
 584                         sk_setfilt(sc_if, (caddr_t)&dummy, i);
 585
 586                 SK_XM_WRITE_4(sc_if, XM_MAR0, 0);
 587                 SK_XM_WRITE_4(sc_if, XM_MAR2, 0);
 588                 break;
 589         case SK_YUKON:
 590         case SK_YUKON_LITE:
 591         case SK_YUKON_LP:
 592                 SK_YU_WRITE_2(sc_if, YUKON_MCAH1, 0);
 593                 SK_YU_WRITE_2(sc_if, YUKON_MCAH2, 0);
 594                 SK_YU_WRITE_2(sc_if, YUKON_MCAH3, 0);
 595                 SK_YU_WRITE_2(sc_if, YUKON_MCAH4, 0);
 596                 break;
 597         }
 598
 599         /* Now program new ones. */
 600         if (ifp->if_flags & IFF_ALLMULTI || ifp->if_flags & IFF_PROMISC) {
 601                 hashes[0] = 0xFFFFFFFF;
 602                 hashes[1] = 0xFFFFFFFF;
 603         } else {
 604                 i = 1;
 605                 /* First find the tail of the list. */
 606                 TAILQ_FOREACH_REVERSE(ifma, &ifp->if_multiaddrs, ifmultihead,
 607                     ifma_link) {
 608                         caddr_t maddr;
 609
 610                         if (ifma->ifma_addr->sa_family != AF_LINK)
 611                                 continue;
 612
 613                         maddr = LLADDR((struct sockaddr_dl *)ifma->ifma_addr);
 614
 615                         /*
 616                          * Program the first XM_RXFILT_MAX multicast groups
 617                          * into the perfect filter. For all others,
 618                          * use the hash table.
 619                          */
 620                         if (SK_IS_GENESIS(sc) && i < XM_RXFILT_MAX) {
 621                                 sk_setfilt(sc_if, maddr, i);
 622                                 i++;
 623                                 continue;
 624                         }
 625
 626                         switch(sc->sk_type) {
 627                         case SK_GENESIS:
 628                                 h = sk_xmac_hash(maddr);
 629                                 break;
 630
 631                         case SK_YUKON:
 632                         case SK_YUKON_LITE:
 633                         case SK_YUKON_LP:
 634                                 h = sk_yukon_hash(maddr);
 635                                 break;
 636                         }
 637                         if (h < 32)
 638                                 hashes[0] |= (1 << h);
 639                         else
 640                                 hashes[1] |= (1 << (h - 32));
 641                 }
 642         }
 643
 644         switch(sc->sk_type) {
 645         case SK_GENESIS:
 646                 SK_XM_SETBIT_4(sc_if, XM_MODE, XM_MODE_RX_USE_HASH|
 647                                XM_MODE_RX_USE_PERFECT);
 648                 SK_XM_WRITE_4(sc_if, XM_MAR0, hashes[0]);
 649                 SK_XM_WRITE_4(sc_if, XM_MAR2, hashes[1]);
 650                 break;
 651         case SK_YUKON:
 652         case SK_YUKON_LITE:
 653         case SK_YUKON_LP:
 654                 SK_YU_WRITE_2(sc_if, YUKON_MCAH1, hashes[0] & 0xffff);
 655                 SK_YU_WRITE_2(sc_if, YUKON_MCAH2, (hashes[0] >> 16) & 0xffff);
 656                 SK_YU_WRITE_2(sc_if, YUKON_MCAH3, hashes[1] & 0xffff);
 657                 SK_YU_WRITE_2(sc_if, YUKON_MCAH4, (hashes[1] >> 16) & 0xffff);
 658                 break;
 659         }
 660 }
 661
 662 static void
 663 sk_setpromisc(struct sk_if_softc *sc_if)
 664 {
 665         struct sk_softc *sc = sc_if->sk_softc;
 666         struct ifnet *ifp = &sc_if->arpcom.ac_if;
 667
 668         switch(sc->sk_type) {
 669         case SK_GENESIS:
 670                 if (ifp->if_flags & IFF_PROMISC)
 671                         SK_XM_SETBIT_4(sc_if, XM_MODE, XM_MODE_RX_PROMISC);
 672                 else
 673                         SK_XM_CLRBIT_4(sc_if, XM_MODE, XM_MODE_RX_PROMISC);
 674                 break;
 675         case SK_YUKON:
 676         case SK_YUKON_LITE:
 677         case SK_YUKON_LP:
 678                 if (ifp->if_flags & IFF_PROMISC) {
 679                         SK_YU_CLRBIT_2(sc_if, YUKON_RCR,
 680                             YU_RCR_UFLEN | YU_RCR_MUFLEN);
 681                 } else {
 682                         SK_YU_SETBIT_2(sc_if, YUKON_RCR,
 683                             YU_RCR_UFLEN | YU_RCR_MUFLEN);
 684                 }
 685                 break;
 686         }
 687 }
 688
 689 static int
 690 sk_init_rx_ring(struct sk_if_softc *sc_if)
 691 {
 692         struct sk_chain_data *cd = &sc_if->sk_cdata;
 693         struct sk_ring_data *rd = &sc_if->sk_rdata;
 694         int i, nexti, error;
 695
 696         bzero(rd->sk_rx_ring, SK_RX_RING_SIZE);
 697
 698         for (i = 0; i < SK_RX_RING_CNT; i++) {
 699                 bus_addr_t paddr;
 700
 701                 if (i == (SK_RX_RING_CNT - 1))
 702                         nexti = 0;
 703                 else
 704                         nexti = i + 1;
 705                 paddr = rd->sk_rx_ring_paddr +
 706                         (nexti * sizeof(struct sk_rx_desc));
 707
 708                 rd->sk_rx_ring[i].sk_next = htole32(SK_ADDR_LO(paddr));
 709                 rd->sk_rx_ring[i].sk_csum1_start = htole16(ETHER_HDR_LEN);
 710                 rd->sk_rx_ring[i].sk_csum2_start =
 711                         htole16(ETHER_HDR_LEN + sizeof(struct ip));
 712
 713                 error = sk_newbuf(sc_if, i, 1);
 714                 if (error) {
 715                         if_printf(&sc_if->arpcom.ac_if,
 716                                   "failed alloc of %dth mbuf\n", i);
 717                         return error;
 718                 }
 719         }
 720
 721         cd->sk_rx_prod = 0;
 722         cd->sk_rx_cons = 0;
 723
 724         return (0);
 725 }
 726
 727 static int
 728 sk_init_tx_ring(struct sk_if_softc *sc_if)
 729 {
 730         struct sk_ring_data *rd = &sc_if->sk_rdata;
 731         int i, nexti;
 732
 733         bzero(rd->sk_tx_ring, SK_TX_RING_SIZE);
 734
 735         for (i = 0; i < SK_TX_RING_CNT; i++) {
 736                 bus_addr_t paddr;
 737
 738                 if (i == (SK_TX_RING_CNT - 1))
 739                         nexti = 0;
 740                 else
 741                         nexti = i + 1;
 742                 paddr = rd->sk_tx_ring_paddr +
 743                         (nexti * sizeof(struct sk_tx_desc));
 744
 745                 rd->sk_tx_ring[i].sk_next = htole32(SK_ADDR_LO(paddr));
 746         }
 747
 748         sc_if->sk_cdata.sk_tx_prod = 0;
 749         sc_if->sk_cdata.sk_tx_cons = 0;
 750         sc_if->sk_cdata.sk_tx_cnt = 0;
 751
 752         return (0);
 753 }
 754
 755 static int
 756 sk_newbuf_jumbo(struct sk_if_softc *sc_if, int idx, int wait)
 757 {
 758         struct sk_jpool_entry *entry;
 759         struct mbuf *m_new = NULL;
 760         struct sk_rx_desc *r;
 761         bus_addr_t paddr;
 762
 763         KKASSERT(idx < SK_RX_RING_CNT && idx >= 0);
 764
 765         MGETHDR(m_new, wait ? MB_WAIT : MB_DONTWAIT, MT_DATA);
 766         if (m_new == NULL)
 767                 return ENOBUFS;
 768
 769         /* Allocate the jumbo buffer */
 770         entry = sk_jalloc(sc_if);
 771         if (entry == NULL) {
 772                 m_freem(m_new);
 773                 DPRINTFN(1, ("%s jumbo allocation failed -- packet "
 774                     "dropped!\n", sc_if->arpcom.ac_if.if_xname));
 775                 return ENOBUFS;
 776         }
 777
 778         m_new->m_ext.ext_arg = entry;
 779         m_new->m_ext.ext_buf = entry->buf;
 780         m_new->m_ext.ext_free = sk_jfree;
 781         m_new->m_ext.ext_ref = sk_jref;
 782         m_new->m_ext.ext_size = SK_JLEN;
 783
 784         m_new->m_flags |= M_EXT;
 785
 786         m_new->m_data = m_new->m_ext.ext_buf;
 787         m_new->m_len = m_new->m_pkthdr.len = m_new->m_ext.ext_size;
 788
 789         paddr = entry->paddr;
 790
 791         /*
 792          * Adjust alignment so packet payload begins on a
 793          * longword boundary. Mandatory for Alpha, useful on
 794          * x86 too.
 795          */
 796         m_adj(m_new, ETHER_ALIGN);
 797         paddr += ETHER_ALIGN;
 798
 799         sc_if->sk_cdata.sk_rx_mbuf[idx] = m_new;
 800
 801         r = &sc_if->sk_rdata.sk_rx_ring[idx];
 802         r->sk_data_lo = htole32(SK_ADDR_LO(paddr));
 803         r->sk_data_hi = htole32(SK_ADDR_HI(paddr));
 804         r->sk_ctl = htole32(m_new->m_pkthdr.len | SK_RXSTAT);
 805
 806         return 0;
 807 }
 808
 809 static int
 810 sk_newbuf_std(struct sk_if_softc *sc_if, int idx, int wait)
 811 {
 812         struct mbuf *m_new = NULL;
 813         struct sk_chain_data *cd = &sc_if->sk_cdata;
 814         struct sk_rx_desc *r;
 815         bus_dma_segment_t seg;
 816         bus_dmamap_t map;
 817         int error, nseg;
 818
 819         KKASSERT(idx < SK_RX_RING_CNT && idx >= 0);
 820
 821         m_new = m_getcl(wait ? MB_WAIT : MB_DONTWAIT, MT_DATA, M_PKTHDR);
 822         if (m_new == NULL)
 823                 return ENOBUFS;
 824
 825         m_new->m_len = m_new->m_pkthdr.len = MCLBYTES;
 826
 827         /*
 828          * Adjust alignment so packet payload begins on a
 829          * longword boundary. Mandatory for Alpha, useful on
 830          * x86 too.
 831          */
 832         m_adj(m_new, ETHER_ALIGN);
 833
 834         error = bus_dmamap_load_mbuf_segment(cd->sk_rx_dtag, cd->sk_rx_dmap_tmp,
 835                         m_new, &seg, 1, &nseg, BUS_DMA_NOWAIT);
 836         if (error) {
 837                 m_freem(m_new);
 838                 if (wait) {
 839                         if_printf(&sc_if->arpcom.ac_if,
 840                                   "could not map RX mbuf\n");
 841                 }
 842                 return error;
 843         }
 844
 845         /* Unload originally mapped mbuf */
 846         if (cd->sk_rx_mbuf[idx] != NULL) {
 847                 bus_dmamap_sync(cd->sk_rx_dtag, cd->sk_rx_dmap[idx],
 848                                 BUS_DMASYNC_POSTREAD);
 849                 bus_dmamap_unload(cd->sk_rx_dtag, cd->sk_rx_dmap[idx]);
 850         }
 851
 852         /* Switch DMA map with tmp DMA map */
 853         map = cd->sk_rx_dmap_tmp;
 854         cd->sk_rx_dmap_tmp = cd->sk_rx_dmap[idx];
 855         cd->sk_rx_dmap[idx] = map;
 856
 857         cd->sk_rx_mbuf[idx] = m_new;
 858
 859         r = &sc_if->sk_rdata.sk_rx_ring[idx];
 860         r->sk_data_lo = htole32(SK_ADDR_LO(seg.ds_addr));
 861         r->sk_data_hi = htole32(SK_ADDR_HI(seg.ds_addr));
 862         r->sk_ctl = htole32(m_new->m_pkthdr.len | SK_RXSTAT);
 863
 864         return 0;
 865 }
 866
 867 /*
 868  * Allocate a jumbo buffer.
 869  */
 870 struct sk_jpool_entry *
 871 sk_jalloc(struct sk_if_softc *sc_if)
 872 {
 873         struct sk_chain_data *cd = &sc_if->sk_cdata;
 874         struct sk_jpool_entry *entry;
 875
 876         lwkt_serialize_enter(&cd->sk_jpool_serializer);
 877
 878         entry = SLIST_FIRST(&cd->sk_jpool_free_ent);
 879         if (entry != NULL) {
 880                 SLIST_REMOVE_HEAD(&cd->sk_jpool_free_ent, entry_next);
 881                 entry->inuse = 1;
 882         } else {
 883                 DPRINTF(("no free jumbo buffer\n"));
 884         }
 885
 886         lwkt_serialize_exit(&cd->sk_jpool_serializer);
 887         return entry;
 888 }
 889
 890 /*
 891  * Release a jumbo buffer.
 892  */
 893 void
 894 sk_jfree(void *arg)
 895 {
 896         struct sk_jpool_entry *entry = arg;
 897         struct sk_chain_data *cd = &entry->sc_if->sk_cdata;
 898
 899         if (&cd->sk_jpool_ent[entry->slot] != entry)
 900                 panic("%s: free wrong jumbo buffer", __func__);
 901         else if (entry->inuse == 0)
 902                 panic("%s: jumbo buffer already freed", __func__);
 903
 904         lwkt_serialize_enter(&cd->sk_jpool_serializer);
 905
 906         atomic_subtract_int(&entry->inuse, 1);
 907         if (entry->inuse == 0)
 908                 SLIST_INSERT_HEAD(&cd->sk_jpool_free_ent, entry, entry_next);
 909
 910         lwkt_serialize_exit(&cd->sk_jpool_serializer);
 911 }
 912
 913 static void
 914 sk_jref(void *arg)
 915 {
 916         struct sk_jpool_entry *entry = arg;
 917         struct sk_chain_data *cd = &entry->sc_if->sk_cdata;
 918
 919         if (&cd->sk_jpool_ent[entry->slot] != entry)
 920                 panic("%s: free wrong jumbo buffer", __func__);
 921         else if (entry->inuse == 0)
 922                 panic("%s: jumbo buffer already freed", __func__);
 923
 924         atomic_add_int(&entry->inuse, 1);
 925 }
 926
 927 /*
 928  * Set media options.
 929  */
 930 static int
 931 sk_ifmedia_upd(struct ifnet *ifp)
 932 {
 933         struct sk_if_softc *sc_if = ifp->if_softc;
 934         struct mii_data *mii;
 935
 936         mii = device_get_softc(sc_if->sk_miibus);
 937         sk_init(sc_if);
 938         mii_mediachg(mii);
 939
 940         return(0);
 941 }
 942
 943 /*
 944  * Report current media status.
 945  */
 946 static void
 947 sk_ifmedia_sts(struct ifnet *ifp, struct ifmediareq *ifmr)
 948 {
 949         struct sk_if_softc *sc_if;
 950         struct mii_data *mii;
 951
 952         sc_if = ifp->if_softc;
 953         mii = device_get_softc(sc_if->sk_miibus);
 954
 955         mii_pollstat(mii);
 956         ifmr->ifm_active = mii->mii_media_active;
 957         ifmr->ifm_status = mii->mii_media_status;
 958 }
 959
 960 static int
 961 sk_ioctl(struct ifnet *ifp, u_long command, caddr_t data, struct ucred *cr)
 962 {
 963         struct sk_if_softc *sc_if = ifp->if_softc;
 964         struct ifreq *ifr = (struct ifreq *)data;
 965         struct mii_data *mii;
 966         int error = 0;
 967
 968         ASSERT_SERIALIZED(ifp->if_serializer);
 969
 970         switch(command) {
 971         case SIOCSIFMTU:
 972                 if (ifr->ifr_mtu > SK_JUMBO_MTU)
 973                         error = EINVAL;
 974                 else {
 975                         ifp->if_mtu = ifr->ifr_mtu;
 976                         ifp->if_flags &= ~IFF_RUNNING;
 977                         sk_init(sc_if);
 978                 }
 979                 break;
 980         case SIOCSIFFLAGS:
 981                 if (ifp->if_flags & IFF_UP) {
 982                         if (ifp->if_flags & IFF_RUNNING) {
 983                                 if ((ifp->if_flags ^ sc_if->sk_if_flags)
 984                                     & IFF_PROMISC) {
 985                                         sk_setpromisc(sc_if);
 986                                         sk_setmulti(sc_if);
 987                                 }
 988                         } else
 989                                 sk_init(sc_if);
 990                 } else {
 991                         if (ifp->if_flags & IFF_RUNNING)
 992                                 sk_stop(sc_if);
 993                 }
 994                 sc_if->sk_if_flags = ifp->if_flags;
 995                 break;
 996         case SIOCADDMULTI:
 997         case SIOCDELMULTI:
 998                 sk_setmulti(sc_if);
 999                 break;
1000         case SIOCGIFMEDIA:
1001         case SIOCSIFMEDIA:
1002                 mii = device_get_softc(sc_if->sk_miibus);
1003                 error = ifmedia_ioctl(ifp, ifr, &mii->mii_media, command);
1004                 break;
1005         default:
1006                 error = ether_ioctl(ifp, command, data);
1007                 break;
1008         }
1009
1010         return(error);
1011 }
1012
1013 /*
1014  * Probe for a SysKonnect GEnesis chip. Check the PCI vendor and device
1015  * IDs against our list and return a device name if we find a match.
1016  */
1017 static int
1018 skc_probe(device_t dev)
1019 {
1020         const struct skc_type *t;
1021         uint16_t vid, did;
1022
1023         vid = pci_get_vendor(dev);
1024         did = pci_get_device(dev);
1025
1026         /*
1027          * Only attach to rev.2 of the Linksys EG1032 adapter.
1028          * Rev.3 is supported by re(4).
1029          */
1030         if (vid == PCI_VENDOR_LINKSYS &&
1031             did == PCI_PRODUCT_LINKSYS_EG1032 &&
1032             pci_get_subdevice(dev) != SUBDEVICEID_LINKSYS_EG1032_REV2)
1033                 return ENXIO;
1034
1035         for (t = skc_devs; t->skc_name != NULL; t++) {
1036                 if (vid == t->skc_vid && did == t->skc_did) {
1037                         device_set_desc(dev, t->skc_name);
1038                         return 0;
1039                 }
1040         }
1041         return ENXIO;
1042 }
1043
1044 /*
1045  * Force the GEnesis into reset, then bring it out of reset.
1046  */
1047 static void
1048 sk_reset(struct sk_softc *sc)
1049 {
1050         DPRINTFN(2, ("sk_reset\n"));
1051
1052         CSR_WRITE_2(sc, SK_CSR, SK_CSR_SW_RESET);
1053         CSR_WRITE_2(sc, SK_CSR, SK_CSR_MASTER_RESET);
1054         if (SK_IS_YUKON(sc))
1055                 CSR_WRITE_2(sc, SK_LINK_CTRL, SK_LINK_RESET_SET);
1056
1057         DELAY(1000);
1058         CSR_WRITE_2(sc, SK_CSR, SK_CSR_SW_UNRESET);
1059         DELAY(2);
1060         CSR_WRITE_2(sc, SK_CSR, SK_CSR_MASTER_UNRESET);
1061         if (SK_IS_YUKON(sc))
1062                 CSR_WRITE_2(sc, SK_LINK_CTRL, SK_LINK_RESET_CLEAR);
1063
1064         DPRINTFN(2, ("sk_reset: sk_csr=%x\n", CSR_READ_2(sc, SK_CSR)));
1065         DPRINTFN(2, ("sk_reset: sk_link_ctrl=%x\n",
1066                      CSR_READ_2(sc, SK_LINK_CTRL)));
1067
1068         if (SK_IS_GENESIS(sc)) {
1069                 /* Configure packet arbiter */
1070                 sk_win_write_2(sc, SK_PKTARB_CTL, SK_PKTARBCTL_UNRESET);
1071                 sk_win_write_2(sc, SK_RXPA1_TINIT, SK_PKTARB_TIMEOUT);
1072                 sk_win_write_2(sc, SK_TXPA1_TINIT, SK_PKTARB_TIMEOUT);
1073                 sk_win_write_2(sc, SK_RXPA2_TINIT, SK_PKTARB_TIMEOUT);
1074                 sk_win_write_2(sc, SK_TXPA2_TINIT, SK_PKTARB_TIMEOUT);
1075         }
1076
1077         /* Enable RAM interface */
1078         sk_win_write_4(sc, SK_RAMCTL, SK_RAMCTL_UNRESET);
1079
1080         /*
1081          * Configure interrupt moderation. The moderation timer
1082          * defers interrupts specified in the interrupt moderation
1083          * timer mask based on the timeout specified in the interrupt
1084          * moderation timer init register. Each bit in the timer
1085          * register represents one tick, so to specify a timeout in
1086          * microseconds, we have to multiply by the correct number of
1087          * ticks-per-microsecond.
1088          */
1089         KKASSERT(sc->sk_imtimer_ticks != 0 && sc->sk_imtime != 0);
1090         sk_win_write_4(sc, SK_IMTIMERINIT, SK_IM_USECS(sc, sc->sk_imtime));
1091         sk_win_write_4(sc, SK_IMMR, SK_ISR_TX1_S_EOF|SK_ISR_TX2_S_EOF|
1092             SK_ISR_RX1_EOF|SK_ISR_RX2_EOF);
1093         sk_win_write_1(sc, SK_IMTIMERCTL, SK_IMCTL_START);
1094 }
1095
1096 static int
1097 sk_probe(device_t dev)
1098 {
1099         struct sk_softc *sc = device_get_softc(device_get_parent(dev));
1100         const char *revstr = "", *name = NULL;
1101         char devname[80];
1102
1103         switch (sc->sk_type) {
1104         case SK_GENESIS:
1105                 name = "SysKonnect GEnesis";
1106                 break;
1107         case SK_YUKON:
1108                 name = "Marvell Yukon";
1109                 break;
1110         case SK_YUKON_LITE:
1111                 name = "Marvell Yukon Lite";
1112                 switch (sc->sk_rev) {
1113                 case SK_YUKON_LITE_REV_A0:
1114                         revstr = " rev.A0";
1115                         break;
1116                 case SK_YUKON_LITE_REV_A1:
1117                         revstr = " rev.A1";
1118                         break;
1119                 case SK_YUKON_LITE_REV_A3:
1120                         revstr = " rev.A3";
1121                         break;
1122                 }
1123                 break;
1124         case SK_YUKON_LP:
1125                 name = "Marvell Yukon LP";
1126                 break;
1127         default:
1128                 return ENXIO;
1129         }
1130
1131         ksnprintf(devname, sizeof(devname), "%s%s (0x%x)",
1132                  name, revstr, sc->sk_rev);
1133         device_set_desc_copy(dev, devname);
1134         return 0;
1135 }
1136
1137 /*
1138  * Each XMAC chip is attached as a separate logical IP interface.
1139  * Single port cards will have only one logical interface of course.
1140  */
1141 static int
1142 sk_attach(device_t dev)
1143 {
1144         struct sk_softc *sc = device_get_softc(device_get_parent(dev));
1145         struct sk_if_softc *sc_if = device_get_softc(dev);
1146         struct ifnet *ifp = &sc_if->arpcom.ac_if;
1147         int i, error, if_attached = 0;
1148
1149         if_initname(ifp, device_get_name(dev), device_get_unit(dev));
1150
1151         sc_if->sk_port = *(int *)device_get_ivars(dev);
1152         KKASSERT(sc_if->sk_port == SK_PORT_A || sc_if->sk_port == SK_PORT_B);
1153
1154         sc_if->sk_softc = sc;
1155         sc->sk_if[sc_if->sk_port] = sc_if;
1156
1157         kfree(device_get_ivars(dev), M_DEVBUF);
1158         device_set_ivars(dev, NULL);
1159
1160         if (sc_if->sk_port == SK_PORT_A)
1161                 sc_if->sk_tx_bmu = SK_BMU_TXS_CSR0;
1162         if (sc_if->sk_port == SK_PORT_B)
1163                 sc_if->sk_tx_bmu = SK_BMU_TXS_CSR1;
1164
1165         DPRINTFN(2, ("begin sk_attach: port=%d\n", sc_if->sk_port));
1166
1167         /*
1168          * Get station address for this interface. Note that
1169          * dual port cards actually come with three station
1170          * addresses: one for each port, plus an extra. The
1171          * extra one is used by the SysKonnect driver software
1172          * as a 'virtual' station address for when both ports
1173          * are operating in failover mode. Currently we don't
1174          * use this extra address.
1175          */
1176         for (i = 0; i < ETHER_ADDR_LEN; i++) {
1177                 /* XXX */
1178                 sc_if->arpcom.ac_enaddr[i] =
1179                     sk_win_read_1(sc, SK_MAC0_0 + (sc_if->sk_port * 8) + i);
1180         }
1181
1182         /*
1183          * Set up RAM buffer addresses. The NIC will have a certain
1184          * amount of SRAM on it, somewhere between 512K and 2MB. We
1185          * need to divide this up a) between the transmitter and
1186          * receiver and b) between the two XMACs, if this is a
1187          * dual port NIC. Our algorithm is to divide up the memory
1188          * evenly so that everyone gets a fair share.
1189          */
1190         if (sk_win_read_1(sc, SK_CONFIG) & SK_CONFIG_SINGLEMAC) {
1191                 uint32_t chunk, val;
1192
1193                 chunk = sc->sk_ramsize / 2;
1194                 val = sc->sk_rboff / sizeof(uint64_t);
1195                 sc_if->sk_rx_ramstart = val;
1196                 val += (chunk / sizeof(uint64_t));
1197                 sc_if->sk_rx_ramend = val - 1;
1198                 sc_if->sk_tx_ramstart = val;
1199                 val += (chunk / sizeof(uint64_t));
1200                 sc_if->sk_tx_ramend = val - 1;
1201         } else {
1202                 uint32_t chunk, val;
1203
1204                 chunk = sc->sk_ramsize / 4;
1205                 val = (sc->sk_rboff + (chunk * 2 * sc_if->sk_port)) /
1206                     sizeof(uint64_t);
1207                 sc_if->sk_rx_ramstart = val;
1208                 val += (chunk / sizeof(uint64_t));
1209                 sc_if->sk_rx_ramend = val - 1;
1210                 sc_if->sk_tx_ramstart = val;
1211                 val += (chunk / sizeof(uint64_t));
1212                 sc_if->sk_tx_ramend = val - 1;
1213         }
1214
1215         DPRINTFN(2, ("sk_attach: rx_ramstart=%#x rx_ramend=%#x\n"
1216                      "           tx_ramstart=%#x tx_ramend=%#x\n",
1217                      sc_if->sk_rx_ramstart, sc_if->sk_rx_ramend,
1218                      sc_if->sk_tx_ramstart, sc_if->sk_tx_ramend));
1219
1220         /* Read and save PHY type */
1221         sc_if->sk_phytype = sk_win_read_1(sc, SK_EPROM1) & 0xF;
1222
1223         /* Set PHY address */
1224         if (SK_IS_GENESIS(sc)) {
1225                 switch (sc_if->sk_phytype) {
1226                 case SK_PHYTYPE_XMAC:
1227                         sc_if->sk_phyaddr = SK_PHYADDR_XMAC;
1228                         break;
1229                 case SK_PHYTYPE_BCOM:
1230                         sc_if->sk_phyaddr = SK_PHYADDR_BCOM;
1231                         break;
1232                 default:
1233                         device_printf(dev, "unsupported PHY type: %d\n",
1234                             sc_if->sk_phytype);
1235                         error = ENXIO;
1236                         goto fail;
1237                 }
1238         }
1239
1240         if (SK_IS_YUKON(sc)) {
1241                 if ((sc_if->sk_phytype < SK_PHYTYPE_MARV_COPPER &&
1242                     sc->sk_pmd != 'L' && sc->sk_pmd != 'S')) {
1243                         /* not initialized, punt */
1244                         sc_if->sk_phytype = SK_PHYTYPE_MARV_COPPER;
1245                         sc->sk_coppertype = 1;
1246                 }
1247
1248                 sc_if->sk_phyaddr = SK_PHYADDR_MARV;
1249
1250                 if (!(sc->sk_coppertype))
1251                         sc_if->sk_phytype = SK_PHYTYPE_MARV_FIBER;
1252         }
1253
1254         error = sk_dma_alloc(dev);
1255         if (error)
1256                 goto fail;
1257
1258         ifp->if_softc = sc_if;
1259         ifp->if_mtu = ETHERMTU;
1260         ifp->if_flags = IFF_BROADCAST | IFF_SIMPLEX | IFF_MULTICAST;
1261         ifp->if_ioctl = sk_ioctl;
1262         ifp->if_start = sk_start;
1263         ifp->if_watchdog = sk_watchdog;
1264         ifp->if_init = sk_init;
1265         ifp->if_baudrate = 1000000000;
1266         ifq_set_maxlen(&ifp->if_snd, SK_TX_RING_CNT - 1);
1267         ifq_set_ready(&ifp->if_snd);
1268
1269         ifp->if_capabilities = IFCAP_VLAN_MTU;
1270
1271         /* Don't use jumbo buffers by default */
1272         sc_if->sk_use_jumbo = 0;
1273
1274         /*
1275          * Call MI attach routines.
1276          *
1277          * NOTE:
1278          * This must be done before following sk_init_xxx(), in which
1279          * if_multiaddrs will be used.
1280          */
1281         ether_ifattach(ifp, sc_if->arpcom.ac_enaddr, &sc->sk_serializer);
1282         if_attached = 1;
1283
1284         /*
1285          * Do miibus setup.
1286          */
1287         switch (sc->sk_type) {
1288         case SK_GENESIS:
1289                 sk_init_xmac(sc_if);
1290                 break;
1291         case SK_YUKON:
1292         case SK_YUKON_LITE:
1293         case SK_YUKON_LP:
1294                 sk_init_yukon(sc_if);
1295                 break;
1296         default:
1297                 device_printf(dev, "unknown device type %d\n", sc->sk_type);
1298                 error = ENXIO;
1299                 goto fail;
1300         }
1301
1302         DPRINTFN(2, ("sk_attach: 1\n"));
1303
1304         error = mii_phy_probe(dev, &sc_if->sk_miibus,
1305                               sk_ifmedia_upd, sk_ifmedia_sts);
1306         if (error) {
1307                 device_printf(dev, "no PHY found!\n");
1308                 goto fail;
1309         }
1310
1311         callout_init(&sc_if->sk_tick_timer);
1312
1313         DPRINTFN(2, ("sk_attach: end\n"));
1314         return 0;
1315 fail:
1316         if (if_attached)
1317                 ether_ifdetach(ifp);
1318         sk_detach(dev);
1319         sc->sk_if[sc_if->sk_port] = NULL;
1320         return error;
1321 }
1322
1323 /*
1324  * Attach the interface. Allocate softc structures, do ifmedia
1325  * setup and ethernet/BPF attach.
1326  */
1327 static int
1328 skc_attach(device_t dev)
1329 {
1330         struct sk_softc *sc = device_get_softc(dev);
1331         uint8_t skrs;
1332         int *port;
1333         int error, cpuid;
1334
1335         DPRINTFN(2, ("begin skc_attach\n"));
1336
1337         sc->sk_dev = dev;
1338         lwkt_serialize_init(&sc->sk_serializer);
1339
1340 #ifndef BURN_BRIDGES
1341         /*
1342          * Handle power management nonsense.
1343          */
1344         if (pci_get_powerstate(dev) != PCI_POWERSTATE_D0) {
1345                 uint32_t iobase, membase, irq;
1346
1347                 /* Save important PCI config data. */
1348                 iobase = pci_read_config(dev, SK_PCI_LOIO, 4);
1349                 membase = pci_read_config(dev, SK_PCI_LOMEM, 4);
1350                 irq = pci_read_config(dev, SK_PCI_INTLINE, 4);
1351
1352                 /* Reset the power state. */
1353                 device_printf(dev, "chip is in D%d power mode "
1354                               "-- setting to D0\n", pci_get_powerstate(dev));
1355
1356                 pci_set_powerstate(dev, PCI_POWERSTATE_D0);
1357
1358                 /* Restore PCI config data. */
1359                 pci_write_config(dev, SK_PCI_LOIO, iobase, 4);
1360                 pci_write_config(dev, SK_PCI_LOMEM, membase, 4);
1361                 pci_write_config(dev, SK_PCI_INTLINE, irq, 4);
1362         }
1363 #endif  /* BURN_BRIDGES */
1364
1365         /*
1366          * Map control/status registers.
1367          */
1368         pci_enable_busmaster(dev);
1369
1370         sc->sk_res_rid = SK_PCI_LOMEM;
1371         sc->sk_res = bus_alloc_resource_any(dev, SYS_RES_MEMORY,
1372                                             &sc->sk_res_rid, RF_ACTIVE);
1373         if (sc->sk_res == NULL) {
1374                 device_printf(dev, "couldn't map memory\n");
1375                 error = ENXIO;
1376                 goto fail;
1377         }
1378         sc->sk_btag = rman_get_bustag(sc->sk_res);
1379         sc->sk_bhandle = rman_get_bushandle(sc->sk_res);
1380
1381         sc->sk_type = sk_win_read_1(sc, SK_CHIPVER);
1382         sc->sk_rev = (sk_win_read_1(sc, SK_CONFIG) >> 4);
1383
1384         /* Bail out here if chip is not recognized */
1385         if (!SK_IS_GENESIS(sc) && !SK_IS_YUKON(sc)) {
1386                 device_printf(dev, "unknown chip type: %d\n", sc->sk_type);
1387                 error = ENXIO;
1388                 goto fail;
1389         }
1390
1391         DPRINTFN(2, ("skc_attach: allocate interrupt\n"));
1392
1393         /* Allocate interrupt */
1394         sc->sk_irq_rid = 0;
1395         sc->sk_irq = bus_alloc_resource_any(dev, SYS_RES_IRQ, &sc->sk_irq_rid,
1396                                             RF_SHAREABLE | RF_ACTIVE);
1397         if (sc->sk_irq == NULL) {
1398                 device_printf(dev, "couldn't map interrupt\n");
1399                 error = ENXIO;
1400                 goto fail;
1401         }
1402
1403         switch (sc->sk_type) {
1404         case SK_GENESIS:
1405                 sc->sk_imtimer_ticks = SK_IMTIMER_TICKS_GENESIS;
1406                 break;
1407         default:
1408                 sc->sk_imtimer_ticks = SK_IMTIMER_TICKS_YUKON;
1409                 break;
1410         }
1411         sc->sk_imtime = skc_imtime;
1412
1413         /* Reset the adapter. */
1414         sk_reset(sc);
1415
1416         skrs = sk_win_read_1(sc, SK_EPROM0);
1417         if (SK_IS_GENESIS(sc)) {
1418                 /* Read and save RAM size and RAMbuffer offset */
1419                 switch(skrs) {
1420                 case SK_RAMSIZE_512K_64:
1421                         sc->sk_ramsize = 0x80000;
1422                         sc->sk_rboff = SK_RBOFF_0;
1423                         break;
1424                 case SK_RAMSIZE_1024K_64:
1425                         sc->sk_ramsize = 0x100000;
1426                         sc->sk_rboff = SK_RBOFF_80000;
1427                         break;
1428                 case SK_RAMSIZE_1024K_128:
1429                         sc->sk_ramsize = 0x100000;
1430                         sc->sk_rboff = SK_RBOFF_0;
1431                         break;
1432                 case SK_RAMSIZE_2048K_128:
1433                         sc->sk_ramsize = 0x200000;
1434                         sc->sk_rboff = SK_RBOFF_0;
1435                         break;
1436                 default:
1437                         device_printf(dev, "unknown ram size: %d\n", skrs);
1438                         error = ENXIO;
1439                         goto fail;
1440                 }
1441         } else {
1442                 if (skrs == 0x00)
1443                         sc->sk_ramsize = 0x20000;
1444                 else
1445                         sc->sk_ramsize = skrs * (1<<12);
1446                 sc->sk_rboff = SK_RBOFF_0;
1447         }
1448
1449         DPRINTFN(2, ("skc_attach: ramsize=%d (%dk), rboff=%d\n",
1450                      sc->sk_ramsize, sc->sk_ramsize / 1024,
1451                      sc->sk_rboff));
1452
1453         /* Read and save physical media type */
1454         sc->sk_pmd = sk_win_read_1(sc, SK_PMDTYPE);
1455
1456         if (sc->sk_pmd == 'T' || sc->sk_pmd == '1')
1457                 sc->sk_coppertype = 1;
1458         else
1459                 sc->sk_coppertype = 0;
1460
1461         /* Yukon Lite Rev A0 needs special test, from sk98lin driver */
1462         if (sc->sk_type == SK_YUKON || sc->sk_type == SK_YUKON_LP) {
1463                 uint32_t flashaddr;
1464                 uint8_t testbyte;
1465
1466                 flashaddr = sk_win_read_4(sc, SK_EP_ADDR);
1467
1468                 /* Test Flash-Address Register */
1469                 sk_win_write_1(sc, SK_EP_ADDR+3, 0xff);
1470                 testbyte = sk_win_read_1(sc, SK_EP_ADDR+3);
1471
1472                 if (testbyte != 0) {
1473                         /* This is a Yukon Lite Rev A0 */
1474                         sc->sk_type = SK_YUKON_LITE;
1475                         sc->sk_rev = SK_YUKON_LITE_REV_A0;
1476                         /* Restore Flash-Address Register */
1477                         sk_win_write_4(sc, SK_EP_ADDR, flashaddr);
1478                 }
1479         }
1480
1481         /*
1482          * Create sysctl nodes.
1483          */
1484         sysctl_ctx_init(&sc->sk_sysctl_ctx);
1485         sc->sk_sysctl_tree = SYSCTL_ADD_NODE(&sc->sk_sysctl_ctx,
1486                                              SYSCTL_STATIC_CHILDREN(_hw),
1487                                              OID_AUTO,
1488                                              device_get_nameunit(dev),
1489                                              CTLFLAG_RD, 0, "");
1490         if (sc->sk_sysctl_tree == NULL) {
1491                 device_printf(dev, "can't add sysctl node\n");
1492                 error = ENXIO;
1493                 goto fail;
1494         }
1495         SYSCTL_ADD_PROC(&sc->sk_sysctl_ctx,
1496                         SYSCTL_CHILDREN(sc->sk_sysctl_tree),
1497                         OID_AUTO, "imtime", CTLTYPE_INT | CTLFLAG_RW,
1498                         sc, 0, skc_sysctl_imtime, "I",
1499                         "Interrupt moderation time (usec).");
1500
1501         sc->sk_devs[SK_PORT_A] = device_add_child(dev, "sk", -1);
1502         port = kmalloc(sizeof(*port), M_DEVBUF, M_WAITOK);
1503         *port = SK_PORT_A;
1504         device_set_ivars(sc->sk_devs[SK_PORT_A], port);
1505
1506         if (!(sk_win_read_1(sc, SK_CONFIG) & SK_CONFIG_SINGLEMAC)) {
1507                 sc->sk_devs[SK_PORT_B] = device_add_child(dev, "sk", -1);
1508                 port = kmalloc(sizeof(*port), M_DEVBUF, M_WAITOK);
1509                 *port = SK_PORT_B;
1510                 device_set_ivars(sc->sk_devs[SK_PORT_B], port);
1511         }
1512
1513         /* Turn on the 'driver is loaded' LED. */
1514         CSR_WRITE_2(sc, SK_LED, SK_LED_GREEN_ON);
1515
1516         bus_generic_attach(dev);
1517
1518         error = bus_setup_intr(dev, sc->sk_irq, INTR_MPSAFE, sk_intr, sc,
1519                                &sc->sk_intrhand, &sc->sk_serializer);
1520         if (error) {
1521                 device_printf(dev, "couldn't set up irq\n");
1522                 goto fail;
1523         }
1524
1525         cpuid = rman_get_cpuid(sc->sk_irq);
1526         KKASSERT(cpuid >= 0 && cpuid < ncpus);
1527
1528         if (sc->sk_if[0] != NULL)
1529                 sc->sk_if[0]->arpcom.ac_if.if_cpuid = cpuid;
1530         if (sc->sk_if[1] != NULL)
1531                 sc->sk_if[1]->arpcom.ac_if.if_cpuid = cpuid;
1532
1533         return 0;
1534 fail:
1535         skc_detach(dev);
1536         return error;
1537 }
1538
1539 static int
1540 sk_detach(device_t dev)
1541 {
1542         struct sk_if_softc *sc_if = device_get_softc(dev);
1543
1544         if (device_is_attached(dev)) {
1545                 struct sk_softc *sc = sc_if->sk_softc;
1546                 struct ifnet *ifp = &sc_if->arpcom.ac_if;
1547
1548                 lwkt_serialize_enter(ifp->if_serializer);
1549
1550                 if (sc->sk_intrhand != NULL) {
1551                         if (sc->sk_if[SK_PORT_A] != NULL)
1552                                 sk_stop(sc->sk_if[SK_PORT_A]);
1553                         if (sc->sk_if[SK_PORT_B] != NULL)
1554                                 sk_stop(sc->sk_if[SK_PORT_B]);
1555
1556                         bus_teardown_intr(sc->sk_dev, sc->sk_irq,
1557                                           sc->sk_intrhand);
1558                         sc->sk_intrhand = NULL;
1559                 }
1560
1561                 lwkt_serialize_exit(ifp->if_serializer);
1562
1563                 ether_ifdetach(ifp);
1564         }
1565
1566         if (sc_if->sk_miibus != NULL)
1567                 device_delete_child(dev, sc_if->sk_miibus);
1568
1569         sk_dma_free(dev);
1570         return 0;
1571 }
1572
1573 static int
1574 skc_detach(device_t dev)
1575 {
1576         struct sk_softc *sc = device_get_softc(dev);
1577         int *port;
1578
1579 #ifdef INVARIANTS
1580         if (device_is_attached(dev)) {
1581                 KASSERT(sc->sk_intrhand == NULL,
1582                         ("intr has not been torn down yet"));
1583         }
1584 #endif
1585
1586         if (sc->sk_devs[SK_PORT_A] != NULL) {
1587                 port = device_get_ivars(sc->sk_devs[SK_PORT_A]);
1588                 if (port != NULL) {
1589                         kfree(port, M_DEVBUF);
1590                         device_set_ivars(sc->sk_devs[SK_PORT_A], NULL);
1591                 }
1592                 device_delete_child(dev, sc->sk_devs[SK_PORT_A]);
1593         }
1594         if (sc->sk_devs[SK_PORT_B] != NULL) {
1595                 port = device_get_ivars(sc->sk_devs[SK_PORT_B]);
1596                 if (port != NULL) {
1597                         kfree(port, M_DEVBUF);
1598                         device_set_ivars(sc->sk_devs[SK_PORT_B], NULL);
1599                 }
1600                 device_delete_child(dev, sc->sk_devs[SK_PORT_B]);
1601         }
1602
1603         if (sc->sk_irq != NULL) {
1604                 bus_release_resource(dev, SYS_RES_IRQ, sc->sk_irq_rid,
1605                                      sc->sk_irq);
1606         }
1607         if (sc->sk_res != NULL) {
1608                 bus_release_resource(dev, SYS_RES_MEMORY, sc->sk_res_rid,
1609                                      sc->sk_res);
1610         }
1611
1612         if (sc->sk_sysctl_tree != NULL)
1613                 sysctl_ctx_free(&sc->sk_sysctl_ctx);
1614
1615         return 0;
1616 }
1617
1618 static int
1619 sk_encap(struct sk_if_softc *sc_if, struct mbuf **m_head0, uint32_t *txidx)
1620 {
1621         struct sk_chain_data *cd = &sc_if->sk_cdata;
1622         struct sk_ring_data *rd = &sc_if->sk_rdata;
1623         struct sk_tx_desc *f = NULL;
1624         uint32_t frag, cur, sk_ctl;
1625         bus_dma_segment_t segs[SK_NTXSEG];
1626         bus_dmamap_t map;
1627         int i, error, maxsegs, nsegs;
1628
1629         DPRINTFN(2, ("sk_encap\n"));
1630
1631         maxsegs = SK_TX_RING_CNT - sc_if->sk_cdata.sk_tx_cnt - SK_NDESC_RESERVE;
1632         KASSERT(maxsegs >= SK_NDESC_SPARE, ("not enough spare TX desc"));
1633         if (maxsegs > SK_NTXSEG)
1634                 maxsegs = SK_NTXSEG;
1635
1636         cur = frag = *txidx;
1637
1638 #ifdef SK_DEBUG
1639         if (skdebug >= 2)
1640                 sk_dump_mbuf(*m_head0);
1641 #endif
1642
1643         map = cd->sk_tx_dmap[*txidx];
1644
1645         error = bus_dmamap_load_mbuf_defrag(cd->sk_tx_dtag, map, m_head0,
1646                         segs, maxsegs, &nsegs, BUS_DMA_NOWAIT);
1647         if (error) {
1648                 m_freem(*m_head0);
1649                 *m_head0 = NULL;
1650                 return error;
1651         }
1652
1653         DPRINTFN(2, ("sk_encap: nsegs=%d\n", nsegs));
1654
1655         /* Sync the DMA map. */
1656         bus_dmamap_sync(cd->sk_tx_dtag, map, BUS_DMASYNC_PREWRITE);
1657
1658         for (i = 0; i < nsegs; i++) {
1659                 f = &rd->sk_tx_ring[frag];
1660                 f->sk_data_lo = htole32(SK_ADDR_LO(segs[i].ds_addr));
1661                 f->sk_data_hi = htole32(SK_ADDR_HI(segs[i].ds_addr));
1662                 sk_ctl = segs[i].ds_len | SK_OPCODE_DEFAULT;
1663                 if (i == 0)
1664                         sk_ctl |= SK_TXCTL_FIRSTFRAG;
1665                 else
1666                         sk_ctl |= SK_TXCTL_OWN;
1667                 f->sk_ctl = htole32(sk_ctl);
1668                 cur = frag;
1669                 SK_INC(frag, SK_TX_RING_CNT);
1670         }
1671
1672         cd->sk_tx_mbuf[cur] = *m_head0;
1673         /* Switch DMA map */
1674         cd->sk_tx_dmap[*txidx] = cd->sk_tx_dmap[cur];
1675         cd->sk_tx_dmap[cur] = map;
1676
1677         rd->sk_tx_ring[cur].sk_ctl |=
1678                 htole32(SK_TXCTL_LASTFRAG|SK_TXCTL_EOF_INTR);
1679         rd->sk_tx_ring[*txidx].sk_ctl |= htole32(SK_TXCTL_OWN);
1680
1681         sc_if->sk_cdata.sk_tx_cnt += nsegs;
1682
1683 #ifdef SK_DEBUG
1684         if (skdebug >= 2) {
1685                 struct sk_tx_desc *desc;
1686                 uint32_t idx;
1687
1688                 for (idx = *txidx; idx != frag; SK_INC(idx, SK_TX_RING_CNT)) {
1689                         desc = &sc_if->sk_rdata->sk_tx_ring[idx];
1690                         sk_dump_txdesc(desc, idx);
1691                 }
1692         }
1693 #endif
1694
1695         *txidx = frag;
1696
1697         DPRINTFN(2, ("sk_encap: completed successfully\n"));
1698
1699         return (0);
1700 }
1701
1702 static void
1703 sk_start(struct ifnet *ifp)
1704 {
1705         struct sk_if_softc *sc_if = ifp->if_softc;
1706         struct sk_softc *sc = sc_if->sk_softc;
1707         uint32_t idx = sc_if->sk_cdata.sk_tx_prod;
1708         int trans = 0;
1709
1710         DPRINTFN(2, ("sk_start\n"));
1711
1712         if ((ifp->if_flags & IFF_RUNNING) == 0 || ifq_is_oactive(&ifp->if_snd))
1713                 return;
1714
1715         while (sc_if->sk_cdata.sk_tx_mbuf[idx] == NULL) {
1716                 struct mbuf *m_head;
1717
1718                 if (SK_IS_OACTIVE(sc_if)) {
1719                         ifq_set_oactive(&ifp->if_snd);
1720                         break;
1721                 }
1722
1723                 m_head = ifq_dequeue(&ifp->if_snd, NULL);
1724                 if (m_head == NULL)
1725                         break;
1726
1727                 /*
1728                  * Pack the data into the transmit ring. If we
1729                  * don't have room, set the OACTIVE flag and wait
1730                  * for the NIC to drain the ring.
1731                  */
1732                 if (sk_encap(sc_if, &m_head, &idx)) {
1733                         if (sc_if->sk_cdata.sk_tx_cnt == 0) {
1734                                 continue;
1735                         } else {
1736                                 ifq_set_oactive(&ifp->if_snd);
1737                                 break;
1738                         }
1739                 }
1740
1741                 trans = 1;
1742                 BPF_MTAP(ifp, m_head);
1743         }
1744         if (!trans)
1745                 return;
1746
1747         /* Transmit */
1748         if (idx != sc_if->sk_cdata.sk_tx_prod) {
1749                 sc_if->sk_cdata.sk_tx_prod = idx;
1750                 CSR_WRITE_4(sc, sc_if->sk_tx_bmu, SK_TXBMU_TX_START);
1751
1752                 /* Set a timeout in case the chip goes out to lunch. */
1753                 ifp->if_timer = 5;
1754         }
1755 }
1756
1757 static void
1758 sk_watchdog(struct ifnet *ifp)
1759 {
1760         struct sk_if_softc *sc_if = ifp->if_softc;
1761
1762         ASSERT_SERIALIZED(ifp->if_serializer);
1763         /*
1764          * Reclaim first as there is a possibility of losing Tx completion
1765          * interrupts.
1766          */
1767         sk_txeof(sc_if);
1768         if (sc_if->sk_cdata.sk_tx_cnt != 0) {
1769                 if_printf(&sc_if->arpcom.ac_if, "watchdog timeout\n");
1770                 ifp->if_oerrors++;
1771                 ifp->if_flags &= ~IFF_RUNNING;
1772                 sk_init(sc_if);
1773         }
1774 }
1775
1776 static void
1777 skc_shutdown(device_t dev)
1778 {
1779         struct sk_softc *sc = device_get_softc(dev);
1780
1781         DPRINTFN(2, ("sk_shutdown\n"));
1782
1783         lwkt_serialize_enter(&sc->sk_serializer);
1784
1785         /* Turn off the 'driver is loaded' LED. */
1786         CSR_WRITE_2(sc, SK_LED, SK_LED_GREEN_OFF);
1787
1788         /*
1789          * Reset the GEnesis controller. Doing this should also
1790          * assert the resets on the attached XMAC(s).
1791          */
1792         sk_reset(sc);
1793
1794         lwkt_serialize_exit(&sc->sk_serializer);
1795 }
1796
1797 static __inline int
1798 sk_rxvalid(struct sk_softc *sc, uint32_t stat, uint32_t len)
1799 {
1800         if (sc->sk_type == SK_GENESIS) {
1801                 if ((stat & XM_RXSTAT_ERRFRAME) == XM_RXSTAT_ERRFRAME ||
1802                     XM_RXSTAT_BYTES(stat) != len)
1803                         return (0);
1804         } else {
1805                 if ((stat & (YU_RXSTAT_CRCERR | YU_RXSTAT_LONGERR |
1806                     YU_RXSTAT_MIIERR | YU_RXSTAT_BADFC | YU_RXSTAT_GOODFC |
1807                     YU_RXSTAT_JABBER)) != 0 ||
1808                     (stat & YU_RXSTAT_RXOK) != YU_RXSTAT_RXOK ||
1809                     YU_RXSTAT_BYTES(stat) != len)
1810                         return (0);
1811         }
1812
1813         return (1);
1814 }
1815
1816 static void
1817 sk_rxeof(struct sk_if_softc *sc_if)
1818 {
1819         struct sk_softc *sc = sc_if->sk_softc;
1820         struct ifnet *ifp = &sc_if->arpcom.ac_if;
1821         struct sk_chain_data *cd = &sc_if->sk_cdata;
1822         struct sk_ring_data *rd = &sc_if->sk_rdata;
1823         int i, reap, max_frmlen;
1824
1825         DPRINTFN(2, ("sk_rxeof\n"));
1826
1827         i = cd->sk_rx_prod;
1828
1829         if (sc_if->sk_use_jumbo)
1830                 max_frmlen = SK_JUMBO_FRAMELEN;
1831         else
1832                 max_frmlen = ETHER_MAX_LEN;
1833
1834         reap = 0;
1835         for (;;) {
1836                 struct sk_rx_desc *cur_desc;
1837                 uint32_t rxstat, sk_ctl;
1838 #ifdef SK_RXCSUM
1839                 uint16_t csum1, csum2;
1840 #endif
1841                 int cur, total_len;
1842                 struct mbuf *m;
1843
1844                 cur = i;
1845                 cur_desc = &rd->sk_rx_ring[cur];
1846
1847                 sk_ctl = le32toh(cur_desc->sk_ctl);
1848                 if (sk_ctl & SK_RXCTL_OWN) {
1849                         /* Invalidate the descriptor -- it's not ready yet */
1850                         cd->sk_rx_prod = cur;
1851                         break;
1852                 }
1853
1854                 rxstat = le32toh(cur_desc->sk_xmac_rxstat);
1855                 total_len = SK_RXBYTES(le32toh(cur_desc->sk_ctl));
1856
1857 #ifdef SK_RXCSUM
1858                 csum1 = le16toh(cur_desc->sk_csum1);
1859                 csum2 = le16toh(cur_desc->sk_csum2);
1860 #endif
1861
1862                 m = cd->sk_rx_mbuf[cur];
1863
1864                 /*
1865                  * Bump 'i' here, so we can keep going, even if the current
1866                  * RX descriptor reaping fails later.  'i' shoult NOT be used
1867                  * in the following processing any more.
1868                  */
1869                 SK_INC(i, SK_RX_RING_CNT);
1870                 reap = 1;
1871
1872                 if ((sk_ctl & (SK_RXCTL_STATUS_VALID | SK_RXCTL_FIRSTFRAG |
1873                     SK_RXCTL_LASTFRAG)) != (SK_RXCTL_STATUS_VALID |
1874                     SK_RXCTL_FIRSTFRAG | SK_RXCTL_LASTFRAG) ||
1875                     total_len < SK_MIN_FRAMELEN || total_len > max_frmlen ||
1876                     sk_rxvalid(sc, rxstat, total_len) == 0) {
1877                         ifp->if_ierrors++;
1878                         cur_desc->sk_ctl = htole32(m->m_pkthdr.len | SK_RXSTAT);
1879                         continue;
1880                 }
1881
1882                 /*
1883                  * Try to allocate a new RX buffer. If that fails,
1884                  * copy the packet to mbufs and put the RX buffer
1885                  * back in the ring so it can be re-used. If
1886                  * allocating mbufs fails, then we have to drop
1887                  * the packet.
1888                  */
1889                 if (sk_newbuf(sc_if, cur, 0)) {
1890                         ifp->if_ierrors++;
1891                         cur_desc->sk_ctl = htole32(m->m_pkthdr.len | SK_RXSTAT);
1892                         continue;
1893                 } else {
1894                         m->m_pkthdr.rcvif = ifp;
1895                         m->m_pkthdr.len = m->m_len = total_len;
1896                 }
1897
1898 #ifdef SK_RXCSUM
1899                 sk_rxcsum(ifp, m, csum1, csum2);
1900 #endif
1901
1902                 ifp->if_ipackets++;
1903                 ifp->if_input(ifp, m);
1904         }
1905 }
1906
1907 #ifdef SK_RXCSUM
1908 static void
1909 sk_rxcsum(struct ifnet *ifp, struct mbuf *m,
1910           const uint16_t csum1, const uint16_t csum2)
1911 {
1912         struct ether_header *eh;
1913         struct ip *ip;
1914         uint8_t *pp;
1915         int hlen, len, plen;
1916         uint16_t iph_csum, ipo_csum, ipd_csum, csum;
1917
1918         pp = mtod(m, uint8_t *);
1919         plen = m->m_pkthdr.len;
1920         if (plen < sizeof(*eh))
1921                 return;
1922         eh = (struct ether_header *)pp;
1923         iph_csum = in_addword(csum1, (~csum2 & 0xffff));
1924
1925         if (eh->ether_type == htons(ETHERTYPE_VLAN)) {
1926                 uint16_t *xp = (uint16_t *)pp;
1927
1928                 xp = (uint16_t *)pp;
1929                 if (xp[1] != htons(ETHERTYPE_IP))
1930                         return;
1931                 iph_csum = in_addword(iph_csum, (~xp[0] & 0xffff));
1932                 iph_csum = in_addword(iph_csum, (~xp[1] & 0xffff));
1933                 xp = (uint16_t *)(pp + sizeof(struct ip));
1934                 iph_csum = in_addword(iph_csum, xp[0]);
1935                 iph_csum = in_addword(iph_csum, xp[1]);
1936                 pp += EVL_ENCAPLEN;
1937         } else if (eh->ether_type != htons(ETHERTYPE_IP)) {
1938                 return;
1939         }
1940
1941         pp += sizeof(*eh);
1942         plen -= sizeof(*eh);
1943
1944         ip = (struct ip *)pp;
1945
1946         if (ip->ip_v != IPVERSION)
1947                 return;
1948
1949         hlen = ip->ip_hl << 2;
1950         if (hlen < sizeof(struct ip))
1951                 return;
1952         if (hlen > ntohs(ip->ip_len))
1953                 return;
1954
1955         /* Don't deal with truncated or padded packets. */
1956         if (plen != ntohs(ip->ip_len))
1957                 return;
1958
1959         len = hlen - sizeof(struct ip);
1960         if (len > 0) {
1961                 uint16_t *p;
1962
1963                 p = (uint16_t *)(ip + 1);
1964                 ipo_csum = 0;
1965                 for (ipo_csum = 0; len > 0; len -= sizeof(*p), p++)
1966                         ipo_csum = in_addword(ipo_csum, *p);
1967                 iph_csum = in_addword(iph_csum, ipo_csum);
1968                 ipd_csum = in_addword(csum2, (~ipo_csum & 0xffff));
1969         } else {
1970                 ipd_csum = csum2;
1971         }
1972
1973         if (iph_csum != 0xffff)
1974                 return;
1975         m->m_pkthdr.csum_flags = CSUM_IP_CHECKED | CSUM_IP_VALID;
1976
1977         if (ip->ip_off & htons(IP_MF | IP_OFFMASK))
1978                 return;                 /* ip frag, we're done for now */
1979
1980         pp += hlen;
1981
1982         /* Only know checksum protocol for udp/tcp */
1983         if (ip->ip_p == IPPROTO_UDP) {
1984                 struct udphdr *uh = (struct udphdr *)pp;
1985
1986                 if (uh->uh_sum == 0)    /* udp with no checksum */
1987                         return;
1988         } else if (ip->ip_p != IPPROTO_TCP) {
1989                 return;
1990         }
1991
1992         csum = in_pseudo(ip->ip_src.s_addr, ip->ip_dst.s_addr,
1993             htonl(ntohs(ip->ip_len) - hlen + ip->ip_p) + ipd_csum);
1994         if (csum == 0xffff) {
1995                 m->m_pkthdr.csum_data = csum;
1996                 m->m_pkthdr.csum_flags |= (CSUM_DATA_VALID | CSUM_PSEUDO_HDR);
1997         }
1998 }
1999 #endif
2000
2001 static void
2002 sk_txeof(struct sk_if_softc *sc_if)
2003 {
2004         struct sk_chain_data *cd = &sc_if->sk_cdata;
2005         struct ifnet *ifp = &sc_if->arpcom.ac_if;
2006         uint32_t idx;
2007         int reap = 0;
2008
2009         DPRINTFN(2, ("sk_txeof\n"));
2010
2011         /*
2012          * Go through our tx ring and free mbufs for those
2013          * frames that have been sent.
2014          */
2015         idx = cd->sk_tx_cons;
2016         while (idx != cd->sk_tx_prod) {
2017                 struct sk_tx_desc *cur_tx;
2018                 uint32_t sk_ctl;
2019
2020                 cur_tx = &sc_if->sk_rdata.sk_tx_ring[idx];
2021                 sk_ctl = le32toh(cur_tx->sk_ctl);
2022 #ifdef SK_DEBUG
2023                 if (skdebug >= 2)
2024                         sk_dump_txdesc(cur_tx, idx);
2025 #endif
2026                 if (sk_ctl & SK_TXCTL_OWN)
2027                         break;
2028                 if (sk_ctl & SK_TXCTL_LASTFRAG)
2029                         ifp->if_opackets++;
2030                 if (cd->sk_tx_mbuf[idx] != NULL) {
2031                         bus_dmamap_unload(cd->sk_tx_dtag, cd->sk_tx_dmap[idx]);
2032                         m_freem(cd->sk_tx_mbuf[idx]);
2033                         cd->sk_tx_mbuf[idx] = NULL;
2034                 }
2035                 sc_if->sk_cdata.sk_tx_cnt--;
2036                 reap = 1;
2037                 SK_INC(idx, SK_TX_RING_CNT);
2038         }
2039
2040         if (!SK_IS_OACTIVE(sc_if))
2041                 ifq_clr_oactive(&ifp->if_snd);
2042
2043         if (sc_if->sk_cdata.sk_tx_cnt == 0)
2044                 ifp->if_timer = 0;
2045
2046         sc_if->sk_cdata.sk_tx_cons = idx;
2047 }
2048
2049 static void
2050 sk_tick(void *xsc_if)
2051 {
2052         struct sk_if_softc *sc_if = xsc_if;
2053         struct ifnet *ifp = &sc_if->arpcom.ac_if;
2054         struct mii_data *mii = device_get_softc(sc_if->sk_miibus);
2055         int i;
2056
2057         DPRINTFN(2, ("sk_tick\n"));
2058
2059         lwkt_serialize_enter(ifp->if_serializer);
2060
2061         if ((ifp->if_flags & IFF_UP) == 0) {
2062                 lwkt_serialize_exit(ifp->if_serializer);
2063                 return;
2064         }
2065
2066         if (sc_if->sk_phytype == SK_PHYTYPE_BCOM) {
2067                 sk_intr_bcom(sc_if);
2068                 lwkt_serialize_exit(ifp->if_serializer);
2069                 return;
2070         }
2071
2072         /*
2073          * According to SysKonnect, the correct way to verify that
2074          * the link has come back up is to poll bit 0 of the GPIO
2075          * register three times. This pin has the signal from the
2076          * link sync pin connected to it; if we read the same link
2077          * state 3 times in a row, we know the link is up.
2078          */
2079         for (i = 0; i < 3; i++) {
2080                 if (SK_XM_READ_2(sc_if, XM_GPIO) & XM_GPIO_GP0_SET)
2081                         break;
2082         }
2083
2084         if (i != 3) {
2085                 callout_reset(&sc_if->sk_tick_timer, hz, sk_tick, sc_if);
2086                 lwkt_serialize_exit(ifp->if_serializer);
2087                 return;
2088         }
2089
2090         /* Turn the GP0 interrupt back on. */
2091         SK_XM_CLRBIT_2(sc_if, XM_IMR, XM_IMR_GP0_SET);
2092         SK_XM_READ_2(sc_if, XM_ISR);
2093         mii_tick(mii);
2094         callout_stop(&sc_if->sk_tick_timer);
2095         lwkt_serialize_exit(ifp->if_serializer);
2096 }
2097
2098 static void
2099 sk_yukon_tick(void *xsc_if)
2100 {
2101         struct sk_if_softc *sc_if = xsc_if;
2102         struct ifnet *ifp = &sc_if->arpcom.ac_if;
2103         struct mii_data *mii = device_get_softc(sc_if->sk_miibus);
2104
2105         lwkt_serialize_enter(ifp->if_serializer);
2106         mii_tick(mii);
2107         callout_reset(&sc_if->sk_tick_timer, hz, sk_yukon_tick, sc_if);
2108         lwkt_serialize_exit(ifp->if_serializer);
2109 }
2110
2111 static void
2112 sk_intr_bcom(struct sk_if_softc *sc_if)
2113 {
2114         struct mii_data *mii = device_get_softc(sc_if->sk_miibus);
2115         struct ifnet *ifp = &sc_if->arpcom.ac_if;
2116         int status;
2117
2118         DPRINTFN(2, ("sk_intr_bcom\n"));
2119
2120         SK_XM_CLRBIT_2(sc_if, XM_MMUCMD, XM_MMUCMD_TX_ENB|XM_MMUCMD_RX_ENB);
2121
2122         /*
2123          * Read the PHY interrupt register to make sure
2124          * we clear any pending interrupts.
2125          */
2126         status = sk_xmac_miibus_readreg(sc_if, SK_PHYADDR_BCOM, BRGPHY_MII_ISR);
2127
2128         if ((ifp->if_flags & IFF_RUNNING) == 0) {
2129                 sk_init_xmac(sc_if);
2130                 return;
2131         }
2132
2133         if (status & (BRGPHY_ISR_LNK_CHG|BRGPHY_ISR_AN_PR)) {
2134                 int lstat;
2135
2136                 lstat = sk_xmac_miibus_readreg(sc_if, SK_PHYADDR_BCOM,
2137                     BRGPHY_MII_AUXSTS);
2138
2139                 if (!(lstat & BRGPHY_AUXSTS_LINK) && sc_if->sk_link) {
2140                         mii_mediachg(mii);
2141                         /* Turn off the link LED. */
2142                         SK_IF_WRITE_1(sc_if, 0,
2143                             SK_LINKLED1_CTL, SK_LINKLED_OFF);
2144                         sc_if->sk_link = 0;
2145                 } else if (status & BRGPHY_ISR_LNK_CHG) {
2146                         sk_xmac_miibus_writereg(sc_if, SK_PHYADDR_BCOM,
2147                             BRGPHY_MII_IMR, 0xFF00);
2148                         mii_tick(mii);
2149                         sc_if->sk_link = 1;
2150                         /* Turn on the link LED. */
2151                         SK_IF_WRITE_1(sc_if, 0, SK_LINKLED1_CTL,
2152                             SK_LINKLED_ON|SK_LINKLED_LINKSYNC_OFF|
2153                             SK_LINKLED_BLINK_OFF);
2154                 } else {
2155                         mii_tick(mii);
2156                         callout_reset(&sc_if->sk_tick_timer, hz,
2157                                       sk_tick, sc_if);
2158                 }
2159         }
2160
2161         SK_XM_SETBIT_2(sc_if, XM_MMUCMD, XM_MMUCMD_TX_ENB|XM_MMUCMD_RX_ENB);
2162 }
2163
2164 static void
2165 sk_intr_xmac(struct sk_if_softc *sc_if)
2166 {
2167         uint16_t status;
2168
2169         status = SK_XM_READ_2(sc_if, XM_ISR);
2170         DPRINTFN(2, ("sk_intr_xmac\n"));
2171
2172         if (sc_if->sk_phytype == SK_PHYTYPE_XMAC &&
2173             (status & (XM_ISR_GP0_SET | XM_ISR_AUTONEG_DONE))) {
2174                 if (status & XM_ISR_GP0_SET)
2175                         SK_XM_SETBIT_2(sc_if, XM_IMR, XM_IMR_GP0_SET);
2176
2177                 callout_reset(&sc_if->sk_tick_timer, hz,
2178                               sk_tick, sc_if);
2179         }
2180
2181         if (status & XM_IMR_TX_UNDERRUN)
2182                 SK_XM_SETBIT_4(sc_if, XM_MODE, XM_MODE_FLUSH_TXFIFO);
2183
2184         if (status & XM_IMR_RX_OVERRUN)
2185                 SK_XM_SETBIT_4(sc_if, XM_MODE, XM_MODE_FLUSH_RXFIFO);
2186 }
2187
2188 static void
2189 sk_intr_yukon(struct sk_if_softc *sc_if)
2190 {
2191         uint8_t status;
2192
2193         status = SK_IF_READ_1(sc_if, 0, SK_GMAC_ISR);
2194         /* RX overrun */
2195         if ((status & SK_GMAC_INT_RX_OVER) != 0) {
2196                 SK_IF_WRITE_1(sc_if, 0, SK_RXMF1_CTRL_TEST,
2197                     SK_RFCTL_RX_FIFO_OVER);
2198         }
2199         /* TX underrun */
2200         if ((status & SK_GMAC_INT_TX_UNDER) != 0) {
2201                 SK_IF_WRITE_1(sc_if, 0, SK_RXMF1_CTRL_TEST,
2202                     SK_TFCTL_TX_FIFO_UNDER);
2203         }
2204
2205         DPRINTFN(2, ("sk_intr_yukon status=%#x\n", status));
2206 }
2207
2208 static void
2209 sk_intr(void *xsc)
2210 {
2211         struct sk_softc *sc = xsc;
2212         struct sk_if_softc *sc_if0 = sc->sk_if[SK_PORT_A];
2213         struct sk_if_softc *sc_if1 = sc->sk_if[SK_PORT_B];
2214         struct ifnet *ifp0 = NULL, *ifp1 = NULL;
2215         uint32_t status;
2216
2217         ASSERT_SERIALIZED(&sc->sk_serializer);
2218
2219         status = CSR_READ_4(sc, SK_ISSR);
2220         if (status == 0 || status == 0xffffffff)
2221                 return;
2222
2223         if (sc_if0 != NULL)
2224                 ifp0 = &sc_if0->arpcom.ac_if;
2225         if (sc_if1 != NULL)
2226                 ifp1 = &sc_if1->arpcom.ac_if;
2227
2228         for (; (status &= sc->sk_intrmask) != 0;) {
2229                 /* Handle receive interrupts first. */
2230                 if (sc_if0 && (status & SK_ISR_RX1_EOF)) {
2231                         sk_rxeof(sc_if0);
2232                         CSR_WRITE_4(sc, SK_BMU_RX_CSR0,
2233                             SK_RXBMU_CLR_IRQ_EOF|SK_RXBMU_RX_START);
2234                 }
2235                 if (sc_if1 && (status & SK_ISR_RX2_EOF)) {
2236                         sk_rxeof(sc_if1);
2237                         CSR_WRITE_4(sc, SK_BMU_RX_CSR1,
2238                             SK_RXBMU_CLR_IRQ_EOF|SK_RXBMU_RX_START);
2239                 }
2240
2241                 /* Then transmit interrupts. */
2242                 if (sc_if0 && (status & SK_ISR_TX1_S_EOF)) {
2243                         sk_txeof(sc_if0);
2244                         CSR_WRITE_4(sc, SK_BMU_TXS_CSR0,
2245                             SK_TXBMU_CLR_IRQ_EOF);
2246                 }
2247                 if (sc_if1 && (status & SK_ISR_TX2_S_EOF)) {
2248                         sk_txeof(sc_if1);
2249                         CSR_WRITE_4(sc, SK_BMU_TXS_CSR1,
2250                             SK_TXBMU_CLR_IRQ_EOF);
2251                 }
2252
2253                 /* Then MAC interrupts. */
2254                 if (sc_if0 && (status & SK_ISR_MAC1) &&
2255                     (ifp0->if_flags & IFF_RUNNING)) {
2256                         if (SK_IS_GENESIS(sc))
2257                                 sk_intr_xmac(sc_if0);
2258                         else
2259                                 sk_intr_yukon(sc_if0);
2260                 }
2261
2262                 if (sc_if1 && (status & SK_ISR_MAC2) &&
2263                     (ifp1->if_flags & IFF_RUNNING)) {
2264                         if (SK_IS_GENESIS(sc))
2265                                 sk_intr_xmac(sc_if1);
2266                         else
2267                                 sk_intr_yukon(sc_if1);
2268                 }
2269
2270                 if (status & SK_ISR_EXTERNAL_REG) {
2271                         if (sc_if0 != NULL &&
2272                             sc_if0->sk_phytype == SK_PHYTYPE_BCOM)
2273                                 sk_intr_bcom(sc_if0);
2274
2275                         if (sc_if1 != NULL &&
2276                             sc_if1->sk_phytype == SK_PHYTYPE_BCOM)
2277                                 sk_intr_bcom(sc_if1);
2278                 }
2279                 status = CSR_READ_4(sc, SK_ISSR);
2280         }
2281
2282         CSR_WRITE_4(sc, SK_IMR, sc->sk_intrmask);
2283
2284         if (ifp0 != NULL && !ifq_is_empty(&ifp0->if_snd))
2285                 if_devstart(ifp0);
2286         if (ifp1 != NULL && !ifq_is_empty(&ifp1->if_snd))
2287                 if_devstart(ifp1);
2288 }
2289
2290 static void
2291 sk_init_xmac(struct sk_if_softc *sc_if)
2292 {
2293         struct sk_softc *sc = sc_if->sk_softc;
2294         struct ifnet *ifp = &sc_if->arpcom.ac_if;
2295         static const struct sk_bcom_hack bhack[] = {
2296         { 0x18, 0x0c20 }, { 0x17, 0x0012 }, { 0x15, 0x1104 }, { 0x17, 0x0013 },
2297         { 0x15, 0x0404 }, { 0x17, 0x8006 }, { 0x15, 0x0132 }, { 0x17, 0x8006 },
2298         { 0x15, 0x0232 }, { 0x17, 0x800D }, { 0x15, 0x000F }, { 0x18, 0x0420 },
2299         { 0, 0 } };
2300
2301         DPRINTFN(2, ("sk_init_xmac\n"));
2302
2303         /* Unreset the XMAC. */
2304         SK_IF_WRITE_2(sc_if, 0, SK_TXF1_MACCTL, SK_TXMACCTL_XMAC_UNRESET);
2305         DELAY(1000);
2306
2307         /* Reset the XMAC's internal state. */
2308         SK_XM_SETBIT_2(sc_if, XM_GPIO, XM_GPIO_RESETMAC);
2309
2310         /* Save the XMAC II revision */
2311         sc_if->sk_xmac_rev = XM_XMAC_REV(SK_XM_READ_4(sc_if, XM_DEVID));
2312
2313         /*
2314          * Perform additional initialization for external PHYs,
2315          * namely for the 1000baseT cards that use the XMAC's
2316          * GMII mode.
2317          */
2318         if (sc_if->sk_phytype == SK_PHYTYPE_BCOM) {
2319                 int i = 0;
2320                 uint32_t val;
2321
2322                 /* Take PHY out of reset. */
2323                 val = sk_win_read_4(sc, SK_GPIO);
2324                 if (sc_if->sk_port == SK_PORT_A)
2325                         val |= SK_GPIO_DIR0|SK_GPIO_DAT0;
2326                 else
2327                         val |= SK_GPIO_DIR2|SK_GPIO_DAT2;
2328                 sk_win_write_4(sc, SK_GPIO, val);
2329
2330                 /* Enable GMII mode on the XMAC. */
2331                 SK_XM_SETBIT_2(sc_if, XM_HWCFG, XM_HWCFG_GMIIMODE);
2332
2333                 sk_xmac_miibus_writereg(sc_if, SK_PHYADDR_BCOM,
2334                     BRGPHY_MII_BMCR, BRGPHY_BMCR_RESET);
2335                 DELAY(10000);
2336                 sk_xmac_miibus_writereg(sc_if, SK_PHYADDR_BCOM,
2337                     BRGPHY_MII_IMR, 0xFFF0);
2338
2339                 /*
2340                  * Early versions of the BCM5400 apparently have
2341                  * a bug that requires them to have their reserved
2342                  * registers initialized to some magic values. I don't
2343                  * know what the numbers do, I'm just the messenger.
2344                  */
2345                 if (sk_xmac_miibus_readreg(sc_if, SK_PHYADDR_BCOM, 0x03)
2346                     == 0x6041) {
2347                         while(bhack[i].reg) {
2348                                 sk_xmac_miibus_writereg(sc_if, SK_PHYADDR_BCOM,
2349                                     bhack[i].reg, bhack[i].val);
2350                                 i++;
2351                         }
2352                 }
2353         }
2354
2355         /* Set station address */
2356         SK_XM_WRITE_2(sc_if, XM_PAR0,
2357             *(uint16_t *)(&sc_if->arpcom.ac_enaddr[0]));
2358         SK_XM_WRITE_2(sc_if, XM_PAR1,
2359             *(uint16_t *)(&sc_if->arpcom.ac_enaddr[2]));
2360         SK_XM_WRITE_2(sc_if, XM_PAR2,
2361             *(uint16_t *)(&sc_if->arpcom.ac_enaddr[4]));
2362         SK_XM_SETBIT_4(sc_if, XM_MODE, XM_MODE_RX_USE_STATION);
2363
2364         if (ifp->if_flags & IFF_BROADCAST)
2365                 SK_XM_CLRBIT_4(sc_if, XM_MODE, XM_MODE_RX_NOBROAD);
2366         else
2367                 SK_XM_SETBIT_4(sc_if, XM_MODE, XM_MODE_RX_NOBROAD);
2368
2369         /* We don't need the FCS appended to the packet. */
2370         SK_XM_SETBIT_2(sc_if, XM_RXCMD, XM_RXCMD_STRIPFCS);
2371
2372         /* We want short frames padded to 60 bytes. */
2373         SK_XM_SETBIT_2(sc_if, XM_TXCMD, XM_TXCMD_AUTOPAD);
2374
2375         /*
2376          * Enable the reception of all error frames. This is
2377          * a necessary evil due to the design of the XMAC. The
2378          * XMAC's receive FIFO is only 8K in size, however jumbo
2379          * frames can be up to 9000 bytes in length. When bad
2380          * frame filtering is enabled, the XMAC's RX FIFO operates
2381          * in 'store and forward' mode. For this to work, the
2382          * entire frame has to fit into the FIFO, but that means
2383          * that jumbo frames larger than 8192 bytes will be
2384          * truncated. Disabling all bad frame filtering causes
2385          * the RX FIFO to operate in streaming mode, in which
2386          * case the XMAC will start transfering frames out of the
2387          * RX FIFO as soon as the FIFO threshold is reached.
2388          */
2389         if (sc_if->sk_use_jumbo) {
2390                 SK_XM_SETBIT_4(sc_if, XM_MODE, XM_MODE_RX_BADFRAMES|
2391                     XM_MODE_RX_GIANTS|XM_MODE_RX_RUNTS|XM_MODE_RX_CRCERRS|
2392                     XM_MODE_RX_INRANGELEN);
2393         }
2394
2395         SK_XM_SETBIT_2(sc_if, XM_RXCMD, XM_RXCMD_BIGPKTOK);
2396
2397         /*
2398          * Bump up the transmit threshold. This helps hold off transmit
2399          * underruns when we're blasting traffic from both ports at once.
2400          */
2401         SK_XM_WRITE_2(sc_if, XM_TX_REQTHRESH, SK_XM_TX_FIFOTHRESH);
2402
2403         /* Set promiscuous mode */
2404         sk_setpromisc(sc_if);
2405
2406         /* Set multicast filter */
2407         sk_setmulti(sc_if);
2408
2409         /* Clear and enable interrupts */
2410         SK_XM_READ_2(sc_if, XM_ISR);
2411         if (sc_if->sk_phytype == SK_PHYTYPE_XMAC)
2412                 SK_XM_WRITE_2(sc_if, XM_IMR, XM_INTRS);
2413         else
2414                 SK_XM_WRITE_2(sc_if, XM_IMR, 0xFFFF);
2415
2416         /* Configure MAC arbiter */
2417         switch(sc_if->sk_xmac_rev) {
2418         case XM_XMAC_REV_B2:
2419                 sk_win_write_1(sc, SK_RCINIT_RX1, SK_RCINIT_XMAC_B2);
2420                 sk_win_write_1(sc, SK_RCINIT_TX1, SK_RCINIT_XMAC_B2);
2421                 sk_win_write_1(sc, SK_RCINIT_RX2, SK_RCINIT_XMAC_B2);
2422                 sk_win_write_1(sc, SK_RCINIT_TX2, SK_RCINIT_XMAC_B2);
2423                 sk_win_write_1(sc, SK_MINIT_RX1, SK_MINIT_XMAC_B2);
2424                 sk_win_write_1(sc, SK_MINIT_TX1, SK_MINIT_XMAC_B2);
2425                 sk_win_write_1(sc, SK_MINIT_RX2, SK_MINIT_XMAC_B2);
2426                 sk_win_write_1(sc, SK_MINIT_TX2, SK_MINIT_XMAC_B2);
2427                 sk_win_write_1(sc, SK_RECOVERY_CTL, SK_RECOVERY_XMAC_B2);
2428                 break;
2429         case XM_XMAC_REV_C1:
2430                 sk_win_write_1(sc, SK_RCINIT_RX1, SK_RCINIT_XMAC_C1);
2431                 sk_win_write_1(sc, SK_RCINIT_TX1, SK_RCINIT_XMAC_C1);
2432                 sk_win_write_1(sc, SK_RCINIT_RX2, SK_RCINIT_XMAC_C1);
2433                 sk_win_write_1(sc, SK_RCINIT_TX2, SK_RCINIT_XMAC_C1);
2434                 sk_win_write_1(sc, SK_MINIT_RX1, SK_MINIT_XMAC_C1);
2435                 sk_win_write_1(sc, SK_MINIT_TX1, SK_MINIT_XMAC_C1);
2436                 sk_win_write_1(sc, SK_MINIT_RX2, SK_MINIT_XMAC_C1);
2437                 sk_win_write_1(sc, SK_MINIT_TX2, SK_MINIT_XMAC_C1);
2438                 sk_win_write_1(sc, SK_RECOVERY_CTL, SK_RECOVERY_XMAC_B2);
2439                 break;
2440         default:
2441                 break;
2442         }
2443         sk_win_write_2(sc, SK_MACARB_CTL,
2444             SK_MACARBCTL_UNRESET|SK_MACARBCTL_FASTOE_OFF);
2445
2446         sc_if->sk_link = 1;
2447 }
2448
2449 static void
2450 sk_init_yukon(struct sk_if_softc *sc_if)
2451 {
2452         uint32_t phy, v;
2453         uint16_t reg;
2454         struct sk_softc *sc;
2455         int i;
2456
2457         sc = sc_if->sk_softc;
2458
2459         DPRINTFN(2, ("sk_init_yukon: start: sk_csr=%#x\n",
2460                      CSR_READ_4(sc_if->sk_softc, SK_CSR)));
2461
2462         if (sc->sk_type == SK_YUKON_LITE &&
2463             sc->sk_rev >= SK_YUKON_LITE_REV_A3) {
2464                 /*
2465                  * Workaround code for COMA mode, set PHY reset.
2466                  * Otherwise it will not correctly take chip out of
2467                  * powerdown (coma)
2468                  */
2469                 v = sk_win_read_4(sc, SK_GPIO);
2470                 v |= SK_GPIO_DIR9 | SK_GPIO_DAT9;
2471                 sk_win_write_4(sc, SK_GPIO, v);
2472         }
2473
2474         DPRINTFN(6, ("sk_init_yukon: 1\n"));
2475
2476         /* GMAC and GPHY Reset */
2477         SK_IF_WRITE_4(sc_if, 0, SK_GPHY_CTRL, SK_GPHY_RESET_SET);
2478         SK_IF_WRITE_4(sc_if, 0, SK_GMAC_CTRL, SK_GMAC_RESET_SET);
2479         DELAY(1000);
2480
2481         DPRINTFN(6, ("sk_init_yukon: 2\n"));
2482
2483         if (sc->sk_type == SK_YUKON_LITE &&
2484             sc->sk_rev >= SK_YUKON_LITE_REV_A3) {
2485                 /*
2486                  * Workaround code for COMA mode, clear PHY reset
2487                  */
2488                 v = sk_win_read_4(sc, SK_GPIO);
2489                 v |= SK_GPIO_DIR9;
2490                 v &= ~SK_GPIO_DAT9;
2491                 sk_win_write_4(sc, SK_GPIO, v);
2492         }
2493
2494         phy = SK_GPHY_INT_POL_HI | SK_GPHY_DIS_FC | SK_GPHY_DIS_SLEEP |
2495                 SK_GPHY_ENA_XC | SK_GPHY_ANEG_ALL | SK_GPHY_ENA_PAUSE;
2496
2497         if (sc->sk_coppertype)
2498                 phy |= SK_GPHY_COPPER;
2499         else
2500                 phy |= SK_GPHY_FIBER;
2501
2502         DPRINTFN(3, ("sk_init_yukon: phy=%#x\n", phy));
2503
2504         SK_IF_WRITE_4(sc_if, 0, SK_GPHY_CTRL, phy | SK_GPHY_RESET_SET);
2505         DELAY(1000);
2506         SK_IF_WRITE_4(sc_if, 0, SK_GPHY_CTRL, phy | SK_GPHY_RESET_CLEAR);
2507         SK_IF_WRITE_4(sc_if, 0, SK_GMAC_CTRL, SK_GMAC_LOOP_OFF |
2508                       SK_GMAC_PAUSE_ON | SK_GMAC_RESET_CLEAR);
2509
2510         DPRINTFN(3, ("sk_init_yukon: gmac_ctrl=%#x\n",
2511                      SK_IF_READ_4(sc_if, 0, SK_GMAC_CTRL)));
2512
2513         DPRINTFN(6, ("sk_init_yukon: 3\n"));
2514
2515         /* unused read of the interrupt source register */
2516         DPRINTFN(6, ("sk_init_yukon: 4\n"));
2517         SK_IF_READ_2(sc_if, 0, SK_GMAC_ISR);
2518
2519         DPRINTFN(6, ("sk_init_yukon: 4a\n"));
2520         reg = SK_YU_READ_2(sc_if, YUKON_PAR);
2521         DPRINTFN(6, ("sk_init_yukon: YUKON_PAR=%#x\n", reg));
2522
2523         /* MIB Counter Clear Mode set */
2524         reg |= YU_PAR_MIB_CLR;
2525         DPRINTFN(6, ("sk_init_yukon: YUKON_PAR=%#x\n", reg));
2526         DPRINTFN(6, ("sk_init_yukon: 4b\n"));
2527         SK_YU_WRITE_2(sc_if, YUKON_PAR, reg);
2528
2529         /* MIB Counter Clear Mode clear */
2530         DPRINTFN(6, ("sk_init_yukon: 5\n"));
2531         reg &= ~YU_PAR_MIB_CLR;
2532         SK_YU_WRITE_2(sc_if, YUKON_PAR, reg);
2533
2534         /* receive control reg */
2535         DPRINTFN(6, ("sk_init_yukon: 7\n"));
2536         SK_YU_WRITE_2(sc_if, YUKON_RCR, YU_RCR_CRCR);
2537
2538         /* transmit parameter register */
2539         DPRINTFN(6, ("sk_init_yukon: 8\n"));
2540         SK_YU_WRITE_2(sc_if, YUKON_TPR, YU_TPR_JAM_LEN(0x3) |
2541                       YU_TPR_JAM_IPG(0xb) | YU_TPR_JAM2DATA_IPG(0x1a) );
2542
2543         /* serial mode register */
2544         DPRINTFN(6, ("sk_init_yukon: 9\n"));
2545         reg = YU_SMR_DATA_BLIND(0x1c) | YU_SMR_MFL_VLAN | YU_SMR_IPG_DATA(0x1e);
2546         if (sc_if->sk_use_jumbo)
2547                 reg |= YU_SMR_MFL_JUMBO;
2548         SK_YU_WRITE_2(sc_if, YUKON_SMR, reg);
2549
2550         DPRINTFN(6, ("sk_init_yukon: 10\n"));
2551         /* Setup Yukon's address */
2552         for (i = 0; i < 3; i++) {
2553                 /* Write Source Address 1 (unicast filter) */
2554                 SK_YU_WRITE_2(sc_if, YUKON_SAL1 + i * 4,
2555                               sc_if->arpcom.ac_enaddr[i * 2] |
2556                               sc_if->arpcom.ac_enaddr[i * 2 + 1] << 8);
2557         }
2558
2559         for (i = 0; i < 3; i++) {
2560                 reg = sk_win_read_2(sc_if->sk_softc,
2561                                     SK_MAC1_0 + i * 2 + sc_if->sk_port * 8);
2562                 SK_YU_WRITE_2(sc_if, YUKON_SAL2 + i * 4, reg);
2563         }
2564
2565         /* Set promiscuous mode */
2566         sk_setpromisc(sc_if);
2567
2568         /* Set multicast filter */
2569         DPRINTFN(6, ("sk_init_yukon: 11\n"));
2570         sk_setmulti(sc_if);
2571
2572         /* enable interrupt mask for counter overflows */
2573         DPRINTFN(6, ("sk_init_yukon: 12\n"));
2574         SK_YU_WRITE_2(sc_if, YUKON_TIMR, 0);
2575         SK_YU_WRITE_2(sc_if, YUKON_RIMR, 0);
2576         SK_YU_WRITE_2(sc_if, YUKON_TRIMR, 0);
2577
2578         /* Configure RX MAC FIFO Flush Mask */
2579         v = YU_RXSTAT_FOFL | YU_RXSTAT_CRCERR | YU_RXSTAT_MIIERR |
2580             YU_RXSTAT_BADFC | YU_RXSTAT_GOODFC | YU_RXSTAT_RUNT |
2581             YU_RXSTAT_JABBER;
2582         SK_IF_WRITE_2(sc_if, 0, SK_RXMF1_FLUSH_MASK, v);
2583
2584         /* Disable RX MAC FIFO Flush for YUKON-Lite Rev. A0 only */
2585         if (sc->sk_type == SK_YUKON_LITE && sc->sk_rev == SK_YUKON_LITE_REV_A0)
2586                 v = SK_TFCTL_OPERATION_ON;
2587         else
2588                 v = SK_TFCTL_OPERATION_ON | SK_RFCTL_FIFO_FLUSH_ON;
2589         /* Configure RX MAC FIFO */
2590         SK_IF_WRITE_1(sc_if, 0, SK_RXMF1_CTRL_TEST, SK_RFCTL_RESET_CLEAR);
2591         SK_IF_WRITE_2(sc_if, 0, SK_RXMF1_CTRL_TEST, v);
2592
2593         /* Increase flush threshould to 64 bytes */
2594         SK_IF_WRITE_2(sc_if, 0, SK_RXMF1_FLUSH_THRESHOLD,
2595             SK_RFCTL_FIFO_THRESHOLD + 1);
2596
2597         /* Configure TX MAC FIFO */
2598         SK_IF_WRITE_1(sc_if, 0, SK_TXMF1_CTRL_TEST, SK_TFCTL_RESET_CLEAR);
2599         SK_IF_WRITE_2(sc_if, 0, SK_TXMF1_CTRL_TEST, SK_TFCTL_OPERATION_ON);
2600
2601         DPRINTFN(6, ("sk_init_yukon: end\n"));
2602 }
2603
2604 /*
2605  * Note that to properly initialize any part of the GEnesis chip,
2606  * you first have to take it out of reset mode.
2607  */
2608 static void
2609 sk_init(void *xsc_if)
2610 {
2611         struct sk_if_softc *sc_if = xsc_if;
2612         struct sk_softc *sc = sc_if->sk_softc;
2613         struct ifnet *ifp = &sc_if->arpcom.ac_if;
2614         struct mii_data *mii = device_get_softc(sc_if->sk_miibus);
2615
2616         DPRINTFN(2, ("sk_init\n"));
2617
2618         ASSERT_SERIALIZED(ifp->if_serializer);
2619
2620         if (ifp->if_flags & IFF_RUNNING)
2621                 return;
2622
2623         /* Cancel pending I/O and free all RX/TX buffers. */
2624         sk_stop(sc_if);
2625
2626         /*
2627          * NOTE: Change sk_use_jumbo after sk_stop(),
2628          *       but before real initialization.
2629          */
2630         if (ifp->if_mtu > ETHER_MAX_LEN)
2631                 sc_if->sk_use_jumbo = 1;
2632         else
2633                 sc_if->sk_use_jumbo = 0;
2634         DPRINTF(("use jumbo buffer: %s\n", sc_if->sk_use_jumbo ? "YES" : "NO"));
2635
2636         if (SK_IS_GENESIS(sc)) {
2637                 /* Configure LINK_SYNC LED */
2638                 SK_IF_WRITE_1(sc_if, 0, SK_LINKLED1_CTL, SK_LINKLED_ON);
2639                 SK_IF_WRITE_1(sc_if, 0, SK_LINKLED1_CTL,
2640                         SK_LINKLED_LINKSYNC_ON);
2641
2642                 /* Configure RX LED */
2643                 SK_IF_WRITE_1(sc_if, 0, SK_RXLED1_CTL,
2644                         SK_RXLEDCTL_COUNTER_START);
2645
2646                 /* Configure TX LED */
2647                 SK_IF_WRITE_1(sc_if, 0, SK_TXLED1_CTL,
2648                         SK_TXLEDCTL_COUNTER_START);
2649         }
2650
2651         /*
2652          * Configure descriptor poll timer
2653          *
2654          * SK-NET GENESIS data sheet says that possibility of losing Start
2655          * transmit command due to CPU/cache related interim storage problems
2656          * under certain conditions. The document recommends a polling
2657          * mechanism to send a Start transmit command to initiate transfer
2658          * of ready descriptors regulary. To cope with this issue sk(4) now
2659          * enables descriptor poll timer to initiate descriptor processing
2660          * periodically as defined by SK_DPT_TIMER_MAX. However sk(4) still
2661          * issue SK_TXBMU_TX_START to Tx BMU to get fast execution of Tx
2662          * command instead of waiting for next descriptor polling time.
2663          * The same rule may apply to Rx side too but it seems that is not
2664          * needed at the moment.
2665          * Since sk(4) uses descriptor polling as a last resort there is no
2666          * need to set smaller polling time than maximum allowable one.
2667          */
2668         SK_IF_WRITE_4(sc_if, 0, SK_DPT_INIT, SK_DPT_TIMER_MAX);
2669
2670         /* Configure I2C registers */
2671
2672         /* Configure XMAC(s) */
2673         switch (sc->sk_type) {
2674         case SK_GENESIS:
2675                 sk_init_xmac(sc_if);
2676                 break;
2677         case SK_YUKON:
2678         case SK_YUKON_LITE:
2679         case SK_YUKON_LP:
2680                 sk_init_yukon(sc_if);
2681                 break;
2682         }
2683         mii_mediachg(mii);
2684
2685         if (SK_IS_GENESIS(sc)) {
2686                 /* Configure MAC FIFOs */
2687                 SK_IF_WRITE_4(sc_if, 0, SK_RXF1_CTL, SK_FIFO_UNRESET);
2688                 SK_IF_WRITE_4(sc_if, 0, SK_RXF1_END, SK_FIFO_END);
2689                 SK_IF_WRITE_4(sc_if, 0, SK_RXF1_CTL, SK_FIFO_ON);
2690
2691                 SK_IF_WRITE_4(sc_if, 0, SK_TXF1_CTL, SK_FIFO_UNRESET);
2692                 SK_IF_WRITE_4(sc_if, 0, SK_TXF1_END, SK_FIFO_END);
2693                 SK_IF_WRITE_4(sc_if, 0, SK_TXF1_CTL, SK_FIFO_ON);
2694         }
2695
2696         /* Configure transmit arbiter(s) */
2697         SK_IF_WRITE_1(sc_if, 0, SK_TXAR1_COUNTERCTL,
2698             SK_TXARCTL_ON | SK_TXARCTL_FSYNC_ON);
2699
2700         /* Configure RAMbuffers */
2701         SK_IF_WRITE_4(sc_if, 0, SK_RXRB1_CTLTST, SK_RBCTL_UNRESET);
2702         SK_IF_WRITE_4(sc_if, 0, SK_RXRB1_START, sc_if->sk_rx_ramstart);
2703         SK_IF_WRITE_4(sc_if, 0, SK_RXRB1_WR_PTR, sc_if->sk_rx_ramstart);
2704         SK_IF_WRITE_4(sc_if, 0, SK_RXRB1_RD_PTR, sc_if->sk_rx_ramstart);
2705         SK_IF_WRITE_4(sc_if, 0, SK_RXRB1_END, sc_if->sk_rx_ramend);
2706         SK_IF_WRITE_4(sc_if, 0, SK_RXRB1_CTLTST, SK_RBCTL_ON);
2707
2708         SK_IF_WRITE_4(sc_if, 1, SK_TXRBS1_CTLTST, SK_RBCTL_UNRESET);
2709         SK_IF_WRITE_4(sc_if, 1, SK_TXRBS1_CTLTST, SK_RBCTL_STORENFWD_ON);
2710         SK_IF_WRITE_4(sc_if, 1, SK_TXRBS1_START, sc_if->sk_tx_ramstart);
2711         SK_IF_WRITE_4(sc_if, 1, SK_TXRBS1_WR_PTR, sc_if->sk_tx_ramstart);
2712         SK_IF_WRITE_4(sc_if, 1, SK_TXRBS1_RD_PTR, sc_if->sk_tx_ramstart);
2713         SK_IF_WRITE_4(sc_if, 1, SK_TXRBS1_END, sc_if->sk_tx_ramend);
2714         SK_IF_WRITE_4(sc_if, 1, SK_TXRBS1_CTLTST, SK_RBCTL_ON);
2715
2716         /* Configure BMUs */
2717         SK_IF_WRITE_4(sc_if, 0, SK_RXQ1_BMU_CSR, SK_RXBMU_ONLINE);
2718         SK_IF_WRITE_4(sc_if, 0, SK_RXQ1_CURADDR_LO,
2719                       SK_ADDR_LO(sc_if->sk_rdata.sk_rx_ring_paddr));
2720         SK_IF_WRITE_4(sc_if, 0, SK_RXQ1_CURADDR_HI,
2721                       SK_ADDR_HI(sc_if->sk_rdata.sk_rx_ring_paddr));
2722
2723         SK_IF_WRITE_4(sc_if, 1, SK_TXQS1_BMU_CSR, SK_TXBMU_ONLINE);
2724         SK_IF_WRITE_4(sc_if, 1, SK_TXQS1_CURADDR_LO,
2725                       SK_ADDR_LO(sc_if->sk_rdata.sk_tx_ring_paddr));
2726         SK_IF_WRITE_4(sc_if, 1, SK_TXQS1_CURADDR_HI,
2727                       SK_ADDR_HI(sc_if->sk_rdata.sk_tx_ring_paddr));
2728
2729         /* Init descriptors */
2730         if (sk_init_rx_ring(sc_if) == ENOBUFS) {
2731                 if_printf(ifp, "initialization failed: "
2732                           "no memory for rx buffers\n");
2733                 sk_stop(sc_if);
2734                 return;
2735         }
2736
2737         if (sk_init_tx_ring(sc_if) == ENOBUFS) {
2738                 if_printf(ifp, "initialization failed: "
2739                           "no memory for tx buffers\n");
2740                 sk_stop(sc_if);
2741                 return;
2742         }
2743
2744         /* Configure interrupt handling */
2745         CSR_READ_4(sc, SK_ISSR);
2746         if (sc_if->sk_port == SK_PORT_A)
2747                 sc->sk_intrmask |= SK_INTRS1;
2748         else
2749                 sc->sk_intrmask |= SK_INTRS2;
2750
2751         sc->sk_intrmask |= SK_ISR_EXTERNAL_REG;
2752
2753         CSR_WRITE_4(sc, SK_IMR, sc->sk_intrmask);
2754
2755         /* Start BMUs. */
2756         SK_IF_WRITE_4(sc_if, 0, SK_RXQ1_BMU_CSR, SK_RXBMU_RX_START);
2757
2758         if (SK_IS_GENESIS(sc)) {
2759                 /* Enable XMACs TX and RX state machines */
2760                 SK_XM_CLRBIT_2(sc_if, XM_MMUCMD, XM_MMUCMD_IGNPAUSE);
2761                 SK_XM_SETBIT_2(sc_if, XM_MMUCMD,
2762                                XM_MMUCMD_TX_ENB|XM_MMUCMD_RX_ENB);
2763         }
2764
2765         if (SK_IS_YUKON(sc)) {
2766                 uint16_t reg = SK_YU_READ_2(sc_if, YUKON_GPCR);
2767                 reg |= YU_GPCR_TXEN | YU_GPCR_RXEN;
2768 #if 0
2769                 /* XXX disable 100Mbps and full duplex mode? */
2770                 reg &= ~(YU_GPCR_SPEED | YU_GPCR_DPLX_DIS);
2771 #endif
2772                 SK_YU_WRITE_2(sc_if, YUKON_GPCR, reg);
2773         }
2774
2775         /* Activate descriptor polling timer */
2776         SK_IF_WRITE_4(sc_if, 0, SK_DPT_TIMER_CTRL, SK_DPT_TCTL_START);
2777         /* Start transfer of Tx descriptors */
2778         CSR_WRITE_4(sc, sc_if->sk_tx_bmu, SK_TXBMU_TX_START);
2779
2780         ifp->if_flags |= IFF_RUNNING;
2781         ifq_clr_oactive(&ifp->if_snd);
2782
2783         if (SK_IS_YUKON(sc))
2784                 callout_reset(&sc_if->sk_tick_timer, hz, sk_yukon_tick, sc_if);
2785 }
2786
2787 static void
2788 sk_stop(struct sk_if_softc *sc_if)
2789 {
2790         struct sk_softc *sc = sc_if->sk_softc;
2791         struct ifnet *ifp = &sc_if->arpcom.ac_if;
2792         struct sk_chain_data *cd = &sc_if->sk_cdata;
2793         uint32_t val;
2794         int i;
2795
2796         ASSERT_SERIALIZED(ifp->if_serializer);
2797
2798         DPRINTFN(2, ("sk_stop\n"));
2799
2800         callout_stop(&sc_if->sk_tick_timer);
2801
2802         ifp->if_flags &= ~IFF_RUNNING;
2803         ifq_clr_oactive(&ifp->if_snd);
2804
2805         /* Stop Tx descriptor polling timer */
2806         SK_IF_WRITE_4(sc_if, 0, SK_DPT_TIMER_CTRL, SK_DPT_TCTL_STOP);
2807
2808         /* Stop transfer of Tx descriptors */
2809         CSR_WRITE_4(sc, sc_if->sk_tx_bmu, SK_TXBMU_TX_STOP);
2810         for (i = 0; i < SK_TIMEOUT; i++) {
2811                 val = CSR_READ_4(sc, sc_if->sk_tx_bmu);
2812                 if (!(val & SK_TXBMU_TX_STOP))
2813                         break;
2814                 DELAY(1);
2815         }
2816         if (i == SK_TIMEOUT)
2817                 if_printf(ifp, "cannot stop transfer of Tx descriptors\n");
2818
2819         /* Stop transfer of Rx descriptors */
2820         SK_IF_WRITE_4(sc_if, 0, SK_RXQ1_BMU_CSR, SK_RXBMU_RX_STOP);
2821         for (i = 0; i < SK_TIMEOUT; i++) {
2822                 val = SK_IF_READ_4(sc_if, 0, SK_RXQ1_BMU_CSR);
2823                 if (!(val & SK_RXBMU_RX_STOP))
2824                         break;
2825                 DELAY(1);
2826         }
2827         if (i == SK_TIMEOUT)
2828                 if_printf(ifp, "cannot stop transfer of Rx descriptors\n");
2829
2830         if (sc_if->sk_phytype == SK_PHYTYPE_BCOM) {
2831                 /* Put PHY back into reset. */
2832                 val = sk_win_read_4(sc, SK_GPIO);
2833                 if (sc_if->sk_port == SK_PORT_A) {
2834                         val |= SK_GPIO_DIR0;
2835                         val &= ~SK_GPIO_DAT0;
2836                 } else {
2837                         val |= SK_GPIO_DIR2;
2838                         val &= ~SK_GPIO_DAT2;
2839                 }
2840                 sk_win_write_4(sc, SK_GPIO, val);
2841         }
2842
2843         /* Turn off various components of this interface. */
2844         SK_XM_SETBIT_2(sc_if, XM_GPIO, XM_GPIO_RESETMAC);
2845         switch (sc->sk_type) {
2846         case SK_GENESIS:
2847                 SK_IF_WRITE_2(sc_if, 0, SK_TXF1_MACCTL, SK_TXMACCTL_XMAC_RESET);
2848                 SK_IF_WRITE_4(sc_if, 0, SK_RXF1_CTL, SK_FIFO_RESET);
2849                 break;
2850         case SK_YUKON:
2851         case SK_YUKON_LITE:
2852         case SK_YUKON_LP:
2853                 SK_IF_WRITE_1(sc_if,0, SK_RXMF1_CTRL_TEST, SK_RFCTL_RESET_SET);
2854                 SK_IF_WRITE_1(sc_if,0, SK_TXMF1_CTRL_TEST, SK_TFCTL_RESET_SET);
2855                 break;
2856         }
2857         SK_IF_WRITE_4(sc_if, 0, SK_RXQ1_BMU_CSR, SK_RXBMU_OFFLINE);
2858         SK_IF_WRITE_4(sc_if, 0, SK_RXRB1_CTLTST, SK_RBCTL_RESET | SK_RBCTL_OFF);
2859         SK_IF_WRITE_4(sc_if, 1, SK_TXQS1_BMU_CSR, SK_TXBMU_OFFLINE);
2860         SK_IF_WRITE_4(sc_if, 1, SK_TXRBS1_CTLTST,
2861             SK_RBCTL_RESET | SK_RBCTL_OFF);
2862         SK_IF_WRITE_1(sc_if, 0, SK_TXAR1_COUNTERCTL, SK_TXARCTL_OFF);
2863         SK_IF_WRITE_1(sc_if, 0, SK_RXLED1_CTL, SK_RXLEDCTL_COUNTER_STOP);
2864         SK_IF_WRITE_1(sc_if, 0, SK_TXLED1_CTL, SK_RXLEDCTL_COUNTER_STOP);
2865         SK_IF_WRITE_1(sc_if, 0, SK_LINKLED1_CTL, SK_LINKLED_OFF);
2866         SK_IF_WRITE_1(sc_if, 0, SK_LINKLED1_CTL, SK_LINKLED_LINKSYNC_OFF);
2867
2868         /* Disable interrupts */
2869         if (sc_if->sk_port == SK_PORT_A)
2870                 sc->sk_intrmask &= ~SK_INTRS1;
2871         else
2872                 sc->sk_intrmask &= ~SK_INTRS2;
2873         CSR_WRITE_4(sc, SK_IMR, sc->sk_intrmask);
2874
2875         SK_XM_READ_2(sc_if, XM_ISR);
2876         SK_XM_WRITE_2(sc_if, XM_IMR, 0xFFFF);
2877
2878         /* Free RX and TX mbufs still in the queues. */
2879         for (i = 0; i < SK_RX_RING_CNT; i++) {
2880                 if (cd->sk_rx_mbuf[i] != NULL) {
2881                         if (!sc_if->sk_use_jumbo) {
2882                                 bus_dmamap_unload(cd->sk_rx_dtag,
2883                                                   cd->sk_rx_dmap[i]);
2884                         }
2885                         m_freem(cd->sk_rx_mbuf[i]);
2886                         cd->sk_rx_mbuf[i] = NULL;
2887                 }
2888         }
2889         for (i = 0; i < SK_TX_RING_CNT; i++) {
2890                 if (cd->sk_tx_mbuf[i] != NULL) {
2891                         bus_dmamap_unload(cd->sk_tx_dtag, cd->sk_tx_dmap[i]);
2892                         m_freem(cd->sk_tx_mbuf[i]);
2893                         cd->sk_tx_mbuf[i] = NULL;
2894                 }
2895         }
2896 }
2897
2898 #ifdef SK_DEBUG
2899 static void
2900 sk_dump_txdesc(struct sk_tx_desc *desc, int idx)
2901 {
2902 #define DESC_PRINT(X)                                   \
2903         if (X)                                  \
2904                 kprintf("txdesc[%d]." #X "=%#x\n",      \
2905                        idx, X);
2906
2907         DESC_PRINT(le32toh(desc->sk_ctl));
2908         DESC_PRINT(le32toh(desc->sk_next));
2909         DESC_PRINT(le32toh(desc->sk_data_lo));
2910         DESC_PRINT(le32toh(desc->sk_data_hi));
2911         DESC_PRINT(le32toh(desc->sk_xmac_txstat));
2912         DESC_PRINT(le16toh(desc->sk_rsvd0));
2913         DESC_PRINT(le16toh(desc->sk_csum_startval));
2914         DESC_PRINT(le16toh(desc->sk_csum_startpos));
2915         DESC_PRINT(le16toh(desc->sk_csum_writepos));
2916         DESC_PRINT(le16toh(desc->sk_rsvd1));
2917 #undef PRINT
2918 }
2919
2920 static void
2921 sk_dump_bytes(const char *data, int len)
2922 {
2923         int c, i, j;
2924
2925         for (i = 0; i < len; i += 16) {
2926                 kprintf("%08x  ", i);
2927                 c = len - i;
2928                 if (c > 16) c = 16;
2929
2930                 for (j = 0; j < c; j++) {
2931                         kprintf("%02x ", data[i + j] & 0xff);
2932                         if ((j & 0xf) == 7 && j > 0)
2933                                 kprintf(" ");
2934                 }
2935
2936                 for (; j < 16; j++)
2937                         kprintf("   ");
2938                 kprintf("  ");
2939
2940                 for (j = 0; j < c; j++) {
2941                         int ch = data[i + j] & 0xff;
2942                         kprintf("%c", ' ' <= ch && ch <= '~' ? ch : ' ');
2943                 }
2944
2945                 kprintf("\n");
2946
2947                 if (c < 16)
2948                         break;
2949         }
2950 }
2951
2952 static void
2953 sk_dump_mbuf(struct mbuf *m)
2954 {
2955         int count = m->m_pkthdr.len;
2956
2957         kprintf("m=%p, m->m_pkthdr.len=%d\n", m, m->m_pkthdr.len);
2958
2959         while (count > 0 && m) {
2960                 kprintf("m=%p, m->m_data=%p, m->m_len=%d\n",
2961                        m, m->m_data, m->m_len);
2962                 sk_dump_bytes(mtod(m, char *), m->m_len);
2963
2964                 count -= m->m_len;
2965                 m = m->m_next;
2966         }
2967 }
2968 #endif
2969
2970 /*
2971  * Allocate jumbo buffer storage. The SysKonnect adapters support
2972  * "jumbograms" (9K frames), although SysKonnect doesn't currently
2973  * use them in their drivers. In order for us to use them, we need
2974  * large 9K receive buffers, however standard mbuf clusters are only
2975  * 2048 bytes in size. Consequently, we need to allocate and manage
2976  * our own jumbo buffer pool. Fortunately, this does not require an
2977  * excessive amount of additional code.
2978  */
2979 static int
2980 sk_jpool_alloc(device_t dev)
2981 {
2982         struct sk_if_softc *sc_if = device_get_softc(dev);
2983         struct sk_chain_data *cd = &sc_if->sk_cdata;
2984         bus_dmamem_t dmem;
2985         bus_addr_t paddr;
2986         caddr_t buf;
2987         int error, i;
2988
2989         lwkt_serialize_init(&cd->sk_jpool_serializer);
2990
2991         error = bus_dmamem_coherent(cd->sk_buf_dtag, PAGE_SIZE /* XXX */, 0,
2992                                     BUS_SPACE_MAXADDR, BUS_SPACE_MAXADDR,
2993                                     SK_JMEM, BUS_DMA_WAITOK, &dmem);
2994         if (error) {
2995                 device_printf(dev, "can't allocate jumbo frame pool\n");
2996                 return error;
2997         }
2998         cd->sk_jpool_dtag = dmem.dmem_tag;
2999         cd->sk_jpool_dmap = dmem.dmem_map;
3000         cd->sk_jpool = dmem.dmem_addr;
3001         paddr = dmem.dmem_busaddr;
3002
3003         SLIST_INIT(&cd->sk_jpool_free_ent);
3004         buf = cd->sk_jpool;
3005
3006         /*
3007          * Now divide it up into SK_JLEN pieces.
3008          */
3009         for (i = 0; i < SK_JSLOTS; i++) {
3010                 struct sk_jpool_entry *entry = &cd->sk_jpool_ent[i];
3011
3012                 entry->sc_if = sc_if;
3013                 entry->inuse = 0;
3014                 entry->slot = i;
3015                 entry->buf = buf;
3016                 entry->paddr = paddr;
3017
3018                 SLIST_INSERT_HEAD(&cd->sk_jpool_free_ent, entry, entry_next);
3019
3020                 buf += SK_JLEN;
3021                 paddr += SK_JLEN;
3022         }
3023         return 0;
3024 }
3025
3026 static void
3027 sk_jpool_free(struct sk_if_softc *sc_if)
3028 {
3029         struct sk_chain_data *cd = &sc_if->sk_cdata;
3030
3031         if (cd->sk_jpool_dtag != NULL) {
3032                 bus_dmamap_unload(cd->sk_jpool_dtag, cd->sk_jpool_dmap);
3033                 bus_dmamem_free(cd->sk_jpool_dtag, cd->sk_jpool,
3034                                 cd->sk_jpool_dmap);
3035                 bus_dma_tag_destroy(cd->sk_jpool_dtag);
3036                 cd->sk_jpool_dtag = NULL;
3037         }
3038 }
3039
3040 static int
3041 sk_dma_alloc(device_t dev)
3042 {
3043         struct sk_if_softc *sc_if = device_get_softc(dev);
3044         struct sk_chain_data *cd = &sc_if->sk_cdata;
3045         struct sk_ring_data *rd = &sc_if->sk_rdata;
3046         bus_dmamem_t dmem;
3047         int i, j, error;
3048
3049         /* Create parent DMA tag */
3050         error = bus_dma_tag_create(NULL, 1, 0,
3051                                    BUS_SPACE_MAXADDR, BUS_SPACE_MAXADDR,
3052                                    NULL, NULL,
3053                                    BUS_SPACE_MAXSIZE_32BIT, 0,
3054                                    BUS_SPACE_MAXSIZE_32BIT,
3055                                    0, &sc_if->sk_parent_dtag);
3056         if (error) {
3057                 device_printf(dev, "can't create parent DMA tag\n");
3058                 return error;
3059         }
3060
3061         /* Create top level ring DMA tag */
3062         error = bus_dma_tag_create(sc_if->sk_parent_dtag,
3063                                    1, SK_RING_BOUNDARY,
3064                                    BUS_SPACE_MAXADDR, BUS_SPACE_MAXADDR,
3065                                    NULL, NULL,
3066                                    BUS_SPACE_MAXSIZE_32BIT, 0,
3067                                    BUS_SPACE_MAXSIZE_32BIT,
3068                                    0, &rd->sk_ring_dtag);
3069         if (error) {
3070                 device_printf(dev, "can't create ring DMA tag\n");
3071                 return error;
3072         }
3073
3074         /* Create top level buffer DMA tag */
3075         error = bus_dma_tag_create(sc_if->sk_parent_dtag, 1, 0,
3076                                    BUS_SPACE_MAXADDR, BUS_SPACE_MAXADDR,
3077                                    NULL, NULL,
3078                                    BUS_SPACE_MAXSIZE_32BIT, 0,
3079                                    BUS_SPACE_MAXSIZE_32BIT,
3080                                    0, &cd->sk_buf_dtag);
3081         if (error) {
3082                 device_printf(dev, "can't create buf DMA tag\n");
3083                 return error;
3084         }
3085
3086         /* Allocate the TX descriptor queue. */
3087         error = bus_dmamem_coherent(rd->sk_ring_dtag, SK_RING_ALIGN, 0,
3088                                     BUS_SPACE_MAXADDR, BUS_SPACE_MAXADDR,
3089                                     SK_TX_RING_SIZE,
3090                                     BUS_DMA_WAITOK | BUS_DMA_ZERO, &dmem);
3091         if (error) {
3092                 device_printf(dev, "can't allocate TX ring\n");
3093                 return error;
3094         }
3095         rd->sk_tx_ring_dtag = dmem.dmem_tag;
3096         rd->sk_tx_ring_dmap = dmem.dmem_map;
3097         rd->sk_tx_ring = dmem.dmem_addr;
3098         rd->sk_tx_ring_paddr = dmem.dmem_busaddr;
3099
3100         /* Allocate the RX descriptor queue. */
3101         error = bus_dmamem_coherent(rd->sk_ring_dtag, SK_RING_ALIGN, 0,
3102                                     BUS_SPACE_MAXADDR, BUS_SPACE_MAXADDR,
3103                                     SK_RX_RING_SIZE,
3104                                     BUS_DMA_WAITOK | BUS_DMA_ZERO, &dmem);
3105         if (error) {
3106                 device_printf(dev, "can't allocate TX ring\n");
3107                 return error;
3108         }
3109         rd->sk_rx_ring_dtag = dmem.dmem_tag;
3110         rd->sk_rx_ring_dmap = dmem.dmem_map;
3111         rd->sk_rx_ring = dmem.dmem_addr;
3112         rd->sk_rx_ring_paddr = dmem.dmem_busaddr;
3113
3114         /* Try to allocate memory for jumbo buffers. */
3115         error = sk_jpool_alloc(dev);
3116         if (error) {
3117                 device_printf(dev, "jumbo buffer allocation failed\n");
3118                 return error;
3119         }
3120
3121         /* Create DMA tag for TX. */
3122         error = bus_dma_tag_create(cd->sk_buf_dtag, 1, 0,
3123                                    BUS_SPACE_MAXADDR, BUS_SPACE_MAXADDR,
3124                                    NULL, NULL,
3125                                    SK_JLEN, SK_NTXSEG, SK_JLEN,
3126                                    BUS_DMA_ALLOCNOW | BUS_DMA_WAITOK |
3127                                    BUS_DMA_ONEBPAGE,
3128                                    &cd->sk_tx_dtag);
3129         if (error) {
3130                 device_printf(dev, "can't create TX DMA tag\n");
3131                 return error;
3132         }
3133
3134         /* Create DMA maps for TX. */
3135         for (i = 0; i < SK_TX_RING_CNT; i++) {
3136                 error = bus_dmamap_create(cd->sk_tx_dtag,
3137                                           BUS_DMA_WAITOK | BUS_DMA_ONEBPAGE,
3138                                           &cd->sk_tx_dmap[i]);
3139                 if (error) {
3140                         device_printf(dev, "can't create %dth TX DMA map\n", i);
3141
3142                         for (j = 0; j < i; ++j) {
3143                                 bus_dmamap_destroy(cd->sk_tx_dtag,
3144                                                    cd->sk_tx_dmap[i]);
3145                         }
3146                         bus_dma_tag_destroy(cd->sk_tx_dtag);
3147                         cd->sk_tx_dtag = NULL;
3148                         return error;
3149                 }
3150         }
3151
3152         /* Create DMA tag for RX. */
3153         error = bus_dma_tag_create(cd->sk_buf_dtag, 1, 0,
3154                                    BUS_SPACE_MAXADDR, BUS_SPACE_MAXADDR,
3155                                    NULL, NULL,
3156                                    MCLBYTES, 1, MCLBYTES,
3157                                    BUS_DMA_ALLOCNOW | BUS_DMA_WAITOK,
3158                                    &cd->sk_rx_dtag);
3159         if (error) {
3160                 device_printf(dev, "can't create RX DMA tag\n");
3161                 return error;
3162         }
3163
3164         /* Create a spare RX DMA map. */
3165         error = bus_dmamap_create(cd->sk_rx_dtag, BUS_DMA_WAITOK,
3166                                   &cd->sk_rx_dmap_tmp);
3167         if (error) {
3168                 device_printf(dev, "can't create spare RX DMA map\n");
3169                 bus_dma_tag_destroy(cd->sk_rx_dtag);
3170                 cd->sk_rx_dtag = NULL;
3171                 return error;
3172         }
3173
3174         /* Create DMA maps for RX. */
3175         for (i = 0; i < SK_RX_RING_CNT; ++i) {
3176                 error = bus_dmamap_create(cd->sk_rx_dtag, BUS_DMA_WAITOK,
3177                                           &cd->sk_rx_dmap[i]);
3178                 if (error) {
3179                         device_printf(dev, "can't create %dth RX DMA map\n", i);
3180
3181                         for (j = 0; j < i; ++j) {
3182                                 bus_dmamap_destroy(cd->sk_rx_dtag,
3183                                                    cd->sk_rx_dmap[i]);
3184                         }
3185                         bus_dmamap_destroy(cd->sk_rx_dtag, cd->sk_rx_dmap_tmp);
3186                         bus_dma_tag_destroy(cd->sk_rx_dtag);
3187                         cd->sk_rx_dtag = NULL;
3188                         return error;
3189                 }
3190         }
3191         return 0;
3192 }
3193
3194 static void
3195 sk_dma_free(device_t dev)
3196 {
3197         struct sk_if_softc *sc_if = device_get_softc(dev);
3198         struct sk_chain_data *cd = &sc_if->sk_cdata;
3199         struct sk_ring_data *rd = &sc_if->sk_rdata;
3200         int i;
3201
3202         if (cd->sk_tx_dtag != NULL) {
3203                 for (i = 0; i < SK_TX_RING_CNT; ++i) {
3204                         KASSERT(cd->sk_tx_mbuf[i] == NULL,
3205                                 ("sk_stop() is not called before %s()",
3206                                  __func__));
3207                         bus_dmamap_destroy(cd->sk_tx_dtag, cd->sk_tx_dmap[i]);
3208                 }
3209                 bus_dma_tag_destroy(cd->sk_tx_dtag);
3210         }
3211
3212         if (cd->sk_rx_dtag != NULL) {
3213                 for (i = 0; i < SK_RX_RING_CNT; ++i) {
3214                         KASSERT(cd->sk_rx_mbuf[i] == NULL,
3215                                 ("sk_stop() is not called before %s()",
3216                                  __func__));
3217                         bus_dmamap_destroy(cd->sk_rx_dtag, cd->sk_rx_dmap[i]);
3218                 }
3219                 bus_dmamap_destroy(cd->sk_rx_dtag, cd->sk_rx_dmap_tmp);
3220                 bus_dma_tag_destroy(cd->sk_rx_dtag);
3221         }
3222
3223         sk_jpool_free(sc_if);
3224
3225         if (rd->sk_rx_ring_dtag != NULL) {
3226                 bus_dmamap_unload(rd->sk_rx_ring_dtag, rd->sk_rx_ring_dmap);
3227                 bus_dmamem_free(rd->sk_rx_ring_dtag, rd->sk_rx_ring,
3228                                 rd->sk_rx_ring_dmap);
3229                 bus_dma_tag_destroy(rd->sk_rx_ring_dtag);
3230         }
3231
3232         if (rd->sk_tx_ring_dtag != NULL) {
3233                 bus_dmamap_unload(rd->sk_tx_ring_dtag, rd->sk_tx_ring_dmap);
3234                 bus_dmamem_free(rd->sk_tx_ring_dtag, rd->sk_tx_ring,
3235                                 rd->sk_tx_ring_dmap);
3236                 bus_dma_tag_destroy(rd->sk_tx_ring_dtag);
3237         }
3238
3239         if (rd->sk_ring_dtag != NULL)
3240                 bus_dma_tag_destroy(rd->sk_ring_dtag);
3241         if (cd->sk_buf_dtag != NULL)
3242                 bus_dma_tag_destroy(cd->sk_buf_dtag);
3243         if (sc_if->sk_parent_dtag != NULL)
3244                 bus_dma_tag_destroy(sc_if->sk_parent_dtag);
3245 }
3246
3247 static int
3248 skc_sysctl_imtime(SYSCTL_HANDLER_ARGS)
3249 {
3250         struct sk_softc *sc = arg1;
3251         struct lwkt_serialize *slize = &sc->sk_serializer;
3252         int error = 0, v;
3253
3254         lwkt_serialize_enter(slize);
3255
3256         v = sc->sk_imtime;
3257         error = sysctl_handle_int(oidp, &v, 0, req);
3258         if (error || req->newptr == NULL)
3259                 goto back;
3260         if (v <= 0) {
3261                 error = EINVAL;
3262                 goto back;
3263         }
3264
3265         if (sc->sk_imtime != v) {
3266                 sc->sk_imtime = v;
3267                 sk_win_write_4(sc, SK_IMTIMERINIT,
3268                                SK_IM_USECS(sc, sc->sk_imtime));
3269
3270                 /*
3271                  * Force interrupt moderation timer to
3272                  * reload new value.
3273                  */
3274                 sk_win_write_4(sc, SK_IMTIMER, 0);
3275         }
3276 back:
3277         lwkt_serialize_exit(slize);
3278         return error;
3279 }