FreeBSD/Linux Kernel Cross Reference
sys/pci/if_ste.c
1 /*-
2 * Copyright (c) 1997, 1998, 1999
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
33 #include <sys/cdefs.h>
34 __FBSDID("$FreeBSD$");
35
36 #ifdef HAVE_KERNEL_OPTION_HEADERS
37 #include "opt_device_polling.h"
38 #endif
39
40 #include <sys/param.h>
41 #include <sys/systm.h>
42 #include <sys/sockio.h>
43 #include <sys/mbuf.h>
44 #include <sys/malloc.h>
45 #include <sys/kernel.h>
46 #include <sys/module.h>
47 #include <sys/socket.h>
48 #include <sys/sysctl.h>
49
50 #include <net/if.h>
51 #include <net/if_arp.h>
52 #include <net/ethernet.h>
53 #include <net/if_dl.h>
54 #include <net/if_media.h>
55 #include <net/if_types.h>
56 #include <net/if_vlan_var.h>
57
58 #include <net/bpf.h>
59
60 #include <vm/vm.h> /* for vtophys */
61 #include <vm/pmap.h> /* for vtophys */
62 #include <machine/bus.h>
63 #include <machine/resource.h>
64 #include <sys/bus.h>
65 #include <sys/rman.h>
66
67 #include <dev/mii/mii.h>
68 #include <dev/mii/miivar.h>
69
70 #include <dev/pci/pcireg.h>
71 #include <dev/pci/pcivar.h>
72
73 /* "device miibus" required. See GENERIC if you get errors here. */
74 #include "miibus_if.h"
75
76 #define STE_USEIOSPACE
77
78 #include <pci/if_stereg.h>
79
80 MODULE_DEPEND(ste, pci, 1, 1, 1);
81 MODULE_DEPEND(ste, ether, 1, 1, 1);
82 MODULE_DEPEND(ste, miibus, 1, 1, 1);
83
84 /*
85 * Various supported device vendors/types and their names.
86 */
87 static struct ste_type ste_devs[] = {
88 { ST_VENDORID, ST_DEVICEID_ST201_1, "Sundance ST201 10/100BaseTX" },
89 { ST_VENDORID, ST_DEVICEID_ST201_2, "Sundance ST201 10/100BaseTX" },
90 { DL_VENDORID, DL_DEVICEID_DL10050, "D-Link DL10050 10/100BaseTX" },
91 { 0, 0, NULL }
92 };
93
94 static int ste_probe(device_t);
95 static int ste_attach(device_t);
96 static int ste_detach(device_t);
97 static void ste_init(void *);
98 static void ste_init_locked(struct ste_softc *);
99 static void ste_intr(void *);
100 static void ste_rxeoc(struct ste_softc *);
101 static void ste_rxeof(struct ste_softc *);
102 static void ste_txeoc(struct ste_softc *);
103 static void ste_txeof(struct ste_softc *);
104 static void ste_stats_update(void *);
105 static void ste_stop(struct ste_softc *);
106 static void ste_reset(struct ste_softc *);
107 static int ste_ioctl(struct ifnet *, u_long, caddr_t);
108 static int ste_encap(struct ste_softc *, struct ste_chain *, struct mbuf *);
109 static void ste_start(struct ifnet *);
110 static void ste_start_locked(struct ifnet *);
111 static void ste_watchdog(struct ifnet *);
112 static int ste_shutdown(device_t);
113 static int ste_newbuf(struct ste_softc *, struct ste_chain_onefrag *,
114 struct mbuf *);
115 static int ste_ifmedia_upd(struct ifnet *);
116 static void ste_ifmedia_upd_locked(struct ifnet *);
117 static void ste_ifmedia_sts(struct ifnet *, struct ifmediareq *);
118
119 static void ste_mii_sync(struct ste_softc *);
120 static void ste_mii_send(struct ste_softc *, u_int32_t, int);
121 static int ste_mii_readreg(struct ste_softc *, struct ste_mii_frame *);
122 static int ste_mii_writereg(struct ste_softc *, struct ste_mii_frame *);
123 static int ste_miibus_readreg(device_t, int, int);
124 static int ste_miibus_writereg(device_t, int, int, int);
125 static void ste_miibus_statchg(device_t);
126
127 static int ste_eeprom_wait(struct ste_softc *);
128 static int ste_read_eeprom(struct ste_softc *, caddr_t, int, int, int);
129 static void ste_wait(struct ste_softc *);
130 static void ste_setmulti(struct ste_softc *);
131 static int ste_init_rx_list(struct ste_softc *);
132 static void ste_init_tx_list(struct ste_softc *);
133
134 #ifdef STE_USEIOSPACE
135 #define STE_RES SYS_RES_IOPORT
136 #define STE_RID STE_PCI_LOIO
137 #else
138 #define STE_RES SYS_RES_MEMORY
139 #define STE_RID STE_PCI_LOMEM
140 #endif
141
142 static device_method_t ste_methods[] = {
143 /* Device interface */
144 DEVMETHOD(device_probe, ste_probe),
145 DEVMETHOD(device_attach, ste_attach),
146 DEVMETHOD(device_detach, ste_detach),
147 DEVMETHOD(device_shutdown, ste_shutdown),
148
149 /* bus interface */
150 DEVMETHOD(bus_print_child, bus_generic_print_child),
151 DEVMETHOD(bus_driver_added, bus_generic_driver_added),
152
153 /* MII interface */
154 DEVMETHOD(miibus_readreg, ste_miibus_readreg),
155 DEVMETHOD(miibus_writereg, ste_miibus_writereg),
156 DEVMETHOD(miibus_statchg, ste_miibus_statchg),
157
158 { 0, 0 }
159 };
160
161 static driver_t ste_driver = {
162 "ste",
163 ste_methods,
164 sizeof(struct ste_softc)
165 };
166
167 static devclass_t ste_devclass;
168
169 DRIVER_MODULE(ste, pci, ste_driver, ste_devclass, 0, 0);
170 DRIVER_MODULE(miibus, ste, miibus_driver, miibus_devclass, 0, 0);
171
172 SYSCTL_NODE(_hw, OID_AUTO, ste, CTLFLAG_RD, 0, "if_ste parameters");
173
174 static int ste_rxsyncs;
175 SYSCTL_INT(_hw_ste, OID_AUTO, rxsyncs, CTLFLAG_RW, &ste_rxsyncs, 0, "");
176
177 #define STE_SETBIT4(sc, reg, x) \
178 CSR_WRITE_4(sc, reg, CSR_READ_4(sc, reg) | (x))
179
180 #define STE_CLRBIT4(sc, reg, x) \
181 CSR_WRITE_4(sc, reg, CSR_READ_4(sc, reg) & ~(x))
182
183 #define STE_SETBIT2(sc, reg, x) \
184 CSR_WRITE_2(sc, reg, CSR_READ_2(sc, reg) | (x))
185
186 #define STE_CLRBIT2(sc, reg, x) \
187 CSR_WRITE_2(sc, reg, CSR_READ_2(sc, reg) & ~(x))
188
189 #define STE_SETBIT1(sc, reg, x) \
190 CSR_WRITE_1(sc, reg, CSR_READ_1(sc, reg) | (x))
191
192 #define STE_CLRBIT1(sc, reg, x) \
193 CSR_WRITE_1(sc, reg, CSR_READ_1(sc, reg) & ~(x))
194
195
196 #define MII_SET(x) STE_SETBIT1(sc, STE_PHYCTL, x)
197 #define MII_CLR(x) STE_CLRBIT1(sc, STE_PHYCTL, x)
198
199 /*
200 * Sync the PHYs by setting data bit and strobing the clock 32 times.
201 */
202 static void
203 ste_mii_sync(sc)
204 struct ste_softc *sc;
205 {
206 register int i;
207
208 MII_SET(STE_PHYCTL_MDIR|STE_PHYCTL_MDATA);
209
210 for (i = 0; i < 32; i++) {
211 MII_SET(STE_PHYCTL_MCLK);
212 DELAY(1);
213 MII_CLR(STE_PHYCTL_MCLK);
214 DELAY(1);
215 }
216
217 return;
218 }
219
220 /*
221 * Clock a series of bits through the MII.
222 */
223 static void
224 ste_mii_send(sc, bits, cnt)
225 struct ste_softc *sc;
226 u_int32_t bits;
227 int cnt;
228 {
229 int i;
230
231 MII_CLR(STE_PHYCTL_MCLK);
232
233 for (i = (0x1 << (cnt - 1)); i; i >>= 1) {
234 if (bits & i) {
235 MII_SET(STE_PHYCTL_MDATA);
236 } else {
237 MII_CLR(STE_PHYCTL_MDATA);
238 }
239 DELAY(1);
240 MII_CLR(STE_PHYCTL_MCLK);
241 DELAY(1);
242 MII_SET(STE_PHYCTL_MCLK);
243 }
244 }
245
246 /*
247 * Read an PHY register through the MII.
248 */
249 static int
250 ste_mii_readreg(sc, frame)
251 struct ste_softc *sc;
252 struct ste_mii_frame *frame;
253
254 {
255 int i, ack;
256
257 /*
258 * Set up frame for RX.
259 */
260 frame->mii_stdelim = STE_MII_STARTDELIM;
261 frame->mii_opcode = STE_MII_READOP;
262 frame->mii_turnaround = 0;
263 frame->mii_data = 0;
264
265 CSR_WRITE_2(sc, STE_PHYCTL, 0);
266 /*
267 * Turn on data xmit.
268 */
269 MII_SET(STE_PHYCTL_MDIR);
270
271 ste_mii_sync(sc);
272
273 /*
274 * Send command/address info.
275 */
276 ste_mii_send(sc, frame->mii_stdelim, 2);
277 ste_mii_send(sc, frame->mii_opcode, 2);
278 ste_mii_send(sc, frame->mii_phyaddr, 5);
279 ste_mii_send(sc, frame->mii_regaddr, 5);
280
281 /* Turn off xmit. */
282 MII_CLR(STE_PHYCTL_MDIR);
283
284 /* Idle bit */
285 MII_CLR((STE_PHYCTL_MCLK|STE_PHYCTL_MDATA));
286 DELAY(1);
287 MII_SET(STE_PHYCTL_MCLK);
288 DELAY(1);
289
290 /* Check for ack */
291 MII_CLR(STE_PHYCTL_MCLK);
292 DELAY(1);
293 ack = CSR_READ_2(sc, STE_PHYCTL) & STE_PHYCTL_MDATA;
294 MII_SET(STE_PHYCTL_MCLK);
295 DELAY(1);
296
297 /*
298 * Now try reading data bits. If the ack failed, we still
299 * need to clock through 16 cycles to keep the PHY(s) in sync.
300 */
301 if (ack) {
302 for(i = 0; i < 16; i++) {
303 MII_CLR(STE_PHYCTL_MCLK);
304 DELAY(1);
305 MII_SET(STE_PHYCTL_MCLK);
306 DELAY(1);
307 }
308 goto fail;
309 }
310
311 for (i = 0x8000; i; i >>= 1) {
312 MII_CLR(STE_PHYCTL_MCLK);
313 DELAY(1);
314 if (!ack) {
315 if (CSR_READ_2(sc, STE_PHYCTL) & STE_PHYCTL_MDATA)
316 frame->mii_data |= i;
317 DELAY(1);
318 }
319 MII_SET(STE_PHYCTL_MCLK);
320 DELAY(1);
321 }
322
323 fail:
324
325 MII_CLR(STE_PHYCTL_MCLK);
326 DELAY(1);
327 MII_SET(STE_PHYCTL_MCLK);
328 DELAY(1);
329
330 if (ack)
331 return(1);
332 return(0);
333 }
334
335 /*
336 * Write to a PHY register through the MII.
337 */
338 static int
339 ste_mii_writereg(sc, frame)
340 struct ste_softc *sc;
341 struct ste_mii_frame *frame;
342
343 {
344
345 /*
346 * Set up frame for TX.
347 */
348
349 frame->mii_stdelim = STE_MII_STARTDELIM;
350 frame->mii_opcode = STE_MII_WRITEOP;
351 frame->mii_turnaround = STE_MII_TURNAROUND;
352
353 /*
354 * Turn on data output.
355 */
356 MII_SET(STE_PHYCTL_MDIR);
357
358 ste_mii_sync(sc);
359
360 ste_mii_send(sc, frame->mii_stdelim, 2);
361 ste_mii_send(sc, frame->mii_opcode, 2);
362 ste_mii_send(sc, frame->mii_phyaddr, 5);
363 ste_mii_send(sc, frame->mii_regaddr, 5);
364 ste_mii_send(sc, frame->mii_turnaround, 2);
365 ste_mii_send(sc, frame->mii_data, 16);
366
367 /* Idle bit. */
368 MII_SET(STE_PHYCTL_MCLK);
369 DELAY(1);
370 MII_CLR(STE_PHYCTL_MCLK);
371 DELAY(1);
372
373 /*
374 * Turn off xmit.
375 */
376 MII_CLR(STE_PHYCTL_MDIR);
377
378 return(0);
379 }
380
381 static int
382 ste_miibus_readreg(dev, phy, reg)
383 device_t dev;
384 int phy, reg;
385 {
386 struct ste_softc *sc;
387 struct ste_mii_frame frame;
388
389 sc = device_get_softc(dev);
390
391 if ( sc->ste_one_phy && phy != 0 )
392 return (0);
393
394 bzero((char *)&frame, sizeof(frame));
395
396 frame.mii_phyaddr = phy;
397 frame.mii_regaddr = reg;
398 ste_mii_readreg(sc, &frame);
399
400 return(frame.mii_data);
401 }
402
403 static int
404 ste_miibus_writereg(dev, phy, reg, data)
405 device_t dev;
406 int phy, reg, data;
407 {
408 struct ste_softc *sc;
409 struct ste_mii_frame frame;
410
411 sc = device_get_softc(dev);
412 bzero((char *)&frame, sizeof(frame));
413
414 frame.mii_phyaddr = phy;
415 frame.mii_regaddr = reg;
416 frame.mii_data = data;
417
418 ste_mii_writereg(sc, &frame);
419
420 return(0);
421 }
422
423 static void
424 ste_miibus_statchg(dev)
425 device_t dev;
426 {
427 struct ste_softc *sc;
428 struct mii_data *mii;
429
430 sc = device_get_softc(dev);
431
432 mii = device_get_softc(sc->ste_miibus);
433
434 if ((mii->mii_media_active & IFM_GMASK) == IFM_FDX) {
435 STE_SETBIT2(sc, STE_MACCTL0, STE_MACCTL0_FULLDUPLEX);
436 } else {
437 STE_CLRBIT2(sc, STE_MACCTL0, STE_MACCTL0_FULLDUPLEX);
438 }
439
440 return;
441 }
442
443 static int
444 ste_ifmedia_upd(ifp)
445 struct ifnet *ifp;
446 {
447 struct ste_softc *sc;
448
449 sc = ifp->if_softc;
450 STE_LOCK(sc);
451 ste_ifmedia_upd_locked(ifp);
452 STE_UNLOCK(sc);
453
454 return(0);
455 }
456
457 static void
458 ste_ifmedia_upd_locked(ifp)
459 struct ifnet *ifp;
460 {
461 struct ste_softc *sc;
462 struct mii_data *mii;
463
464 sc = ifp->if_softc;
465 STE_LOCK_ASSERT(sc);
466 mii = device_get_softc(sc->ste_miibus);
467 sc->ste_link = 0;
468 if (mii->mii_instance) {
469 struct mii_softc *miisc;
470 LIST_FOREACH(miisc, &mii->mii_phys, mii_list)
471 mii_phy_reset(miisc);
472 }
473 mii_mediachg(mii);
474 }
475
476 static void
477 ste_ifmedia_sts(ifp, ifmr)
478 struct ifnet *ifp;
479 struct ifmediareq *ifmr;
480 {
481 struct ste_softc *sc;
482 struct mii_data *mii;
483
484 sc = ifp->if_softc;
485 mii = device_get_softc(sc->ste_miibus);
486
487 STE_LOCK(sc);
488 mii_pollstat(mii);
489 ifmr->ifm_active = mii->mii_media_active;
490 ifmr->ifm_status = mii->mii_media_status;
491 STE_UNLOCK(sc);
492
493 return;
494 }
495
496 static void
497 ste_wait(sc)
498 struct ste_softc *sc;
499 {
500 register int i;
501
502 for (i = 0; i < STE_TIMEOUT; i++) {
503 if (!(CSR_READ_4(sc, STE_DMACTL) & STE_DMACTL_DMA_HALTINPROG))
504 break;
505 }
506
507 if (i == STE_TIMEOUT)
508 device_printf(sc->ste_dev, "command never completed!\n");
509
510 return;
511 }
512
513 /*
514 * The EEPROM is slow: give it time to come ready after issuing
515 * it a command.
516 */
517 static int
518 ste_eeprom_wait(sc)
519 struct ste_softc *sc;
520 {
521 int i;
522
523 DELAY(1000);
524
525 for (i = 0; i < 100; i++) {
526 if (CSR_READ_2(sc, STE_EEPROM_CTL) & STE_EECTL_BUSY)
527 DELAY(1000);
528 else
529 break;
530 }
531
532 if (i == 100) {
533 device_printf(sc->ste_dev, "eeprom failed to come ready\n");
534 return(1);
535 }
536
537 return(0);
538 }
539
540 /*
541 * Read a sequence of words from the EEPROM. Note that ethernet address
542 * data is stored in the EEPROM in network byte order.
543 */
544 static int
545 ste_read_eeprom(sc, dest, off, cnt, swap)
546 struct ste_softc *sc;
547 caddr_t dest;
548 int off;
549 int cnt;
550 int swap;
551 {
552 int err = 0, i;
553 u_int16_t word = 0, *ptr;
554
555 if (ste_eeprom_wait(sc))
556 return(1);
557
558 for (i = 0; i < cnt; i++) {
559 CSR_WRITE_2(sc, STE_EEPROM_CTL, STE_EEOPCODE_READ | (off + i));
560 err = ste_eeprom_wait(sc);
561 if (err)
562 break;
563 word = CSR_READ_2(sc, STE_EEPROM_DATA);
564 ptr = (u_int16_t *)(dest + (i * 2));
565 if (swap)
566 *ptr = ntohs(word);
567 else
568 *ptr = word;
569 }
570
571 return(err ? 1 : 0);
572 }
573
574 static void
575 ste_setmulti(sc)
576 struct ste_softc *sc;
577 {
578 struct ifnet *ifp;
579 int h = 0;
580 u_int32_t hashes[2] = { 0, 0 };
581 struct ifmultiaddr *ifma;
582
583 ifp = sc->ste_ifp;
584 if (ifp->if_flags & IFF_ALLMULTI || ifp->if_flags & IFF_PROMISC) {
585 STE_SETBIT1(sc, STE_RX_MODE, STE_RXMODE_ALLMULTI);
586 STE_CLRBIT1(sc, STE_RX_MODE, STE_RXMODE_MULTIHASH);
587 return;
588 }
589
590 /* first, zot all the existing hash bits */
591 CSR_WRITE_2(sc, STE_MAR0, 0);
592 CSR_WRITE_2(sc, STE_MAR1, 0);
593 CSR_WRITE_2(sc, STE_MAR2, 0);
594 CSR_WRITE_2(sc, STE_MAR3, 0);
595
596 /* now program new ones */
597 IF_ADDR_LOCK(ifp);
598 TAILQ_FOREACH(ifma, &ifp->if_multiaddrs, ifma_link) {
599 if (ifma->ifma_addr->sa_family != AF_LINK)
600 continue;
601 h = ether_crc32_be(LLADDR((struct sockaddr_dl *)
602 ifma->ifma_addr), ETHER_ADDR_LEN) & 0x3F;
603 if (h < 32)
604 hashes[0] |= (1 << h);
605 else
606 hashes[1] |= (1 << (h - 32));
607 }
608 IF_ADDR_UNLOCK(ifp);
609
610 CSR_WRITE_2(sc, STE_MAR0, hashes[0] & 0xFFFF);
611 CSR_WRITE_2(sc, STE_MAR1, (hashes[0] >> 16) & 0xFFFF);
612 CSR_WRITE_2(sc, STE_MAR2, hashes[1] & 0xFFFF);
613 CSR_WRITE_2(sc, STE_MAR3, (hashes[1] >> 16) & 0xFFFF);
614 STE_CLRBIT1(sc, STE_RX_MODE, STE_RXMODE_ALLMULTI);
615 STE_SETBIT1(sc, STE_RX_MODE, STE_RXMODE_MULTIHASH);
616
617 return;
618 }
619
620 #ifdef DEVICE_POLLING
621 static poll_handler_t ste_poll, ste_poll_locked;
622
623 static void
624 ste_poll(struct ifnet *ifp, enum poll_cmd cmd, int count)
625 {
626 struct ste_softc *sc = ifp->if_softc;
627
628 STE_LOCK(sc);
629 if (ifp->if_drv_flags & IFF_DRV_RUNNING)
630 ste_poll_locked(ifp, cmd, count);
631 STE_UNLOCK(sc);
632 }
633
634 static void
635 ste_poll_locked(struct ifnet *ifp, enum poll_cmd cmd, int count)
636 {
637 struct ste_softc *sc = ifp->if_softc;
638
639 STE_LOCK_ASSERT(sc);
640
641 sc->rxcycles = count;
642 if (cmd == POLL_AND_CHECK_STATUS)
643 ste_rxeoc(sc);
644 ste_rxeof(sc);
645 ste_txeof(sc);
646 if (!IFQ_DRV_IS_EMPTY(&ifp->if_snd))
647 ste_start_locked(ifp);
648
649 if (cmd == POLL_AND_CHECK_STATUS) {
650 u_int16_t status;
651
652 status = CSR_READ_2(sc, STE_ISR_ACK);
653
654 if (status & STE_ISR_TX_DONE)
655 ste_txeoc(sc);
656
657 if (status & STE_ISR_STATS_OFLOW) {
658 callout_stop(&sc->ste_stat_callout);
659 ste_stats_update(sc);
660 }
661
662 if (status & STE_ISR_LINKEVENT)
663 mii_pollstat(device_get_softc(sc->ste_miibus));
664
665 if (status & STE_ISR_HOSTERR) {
666 ste_reset(sc);
667 ste_init_locked(sc);
668 }
669 }
670 }
671 #endif /* DEVICE_POLLING */
672
673 static void
674 ste_intr(xsc)
675 void *xsc;
676 {
677 struct ste_softc *sc;
678 struct ifnet *ifp;
679 u_int16_t status;
680
681 sc = xsc;
682 STE_LOCK(sc);
683 ifp = sc->ste_ifp;
684
685 #ifdef DEVICE_POLLING
686 if (ifp->if_capenable & IFCAP_POLLING) {
687 STE_UNLOCK(sc);
688 return;
689 }
690 #endif
691
692 /* See if this is really our interrupt. */
693 if (!(CSR_READ_2(sc, STE_ISR) & STE_ISR_INTLATCH)) {
694 STE_UNLOCK(sc);
695 return;
696 }
697
698 for (;;) {
699 status = CSR_READ_2(sc, STE_ISR_ACK);
700
701 if (!(status & STE_INTRS))
702 break;
703
704 if (status & STE_ISR_RX_DMADONE) {
705 ste_rxeoc(sc);
706 ste_rxeof(sc);
707 }
708
709 if (status & STE_ISR_TX_DMADONE)
710 ste_txeof(sc);
711
712 if (status & STE_ISR_TX_DONE)
713 ste_txeoc(sc);
714
715 if (status & STE_ISR_STATS_OFLOW) {
716 callout_stop(&sc->ste_stat_callout);
717 ste_stats_update(sc);
718 }
719
720 if (status & STE_ISR_LINKEVENT)
721 mii_pollstat(device_get_softc(sc->ste_miibus));
722
723
724 if (status & STE_ISR_HOSTERR) {
725 ste_reset(sc);
726 ste_init_locked(sc);
727 }
728 }
729
730 /* Re-enable interrupts */
731 CSR_WRITE_2(sc, STE_IMR, STE_INTRS);
732
733 if (!IFQ_DRV_IS_EMPTY(&ifp->if_snd))
734 ste_start_locked(ifp);
735
736 STE_UNLOCK(sc);
737
738 return;
739 }
740
741 static void
742 ste_rxeoc(struct ste_softc *sc)
743 {
744 struct ste_chain_onefrag *cur_rx;
745
746 STE_LOCK_ASSERT(sc);
747
748 if (sc->ste_cdata.ste_rx_head->ste_ptr->ste_status == 0) {
749 cur_rx = sc->ste_cdata.ste_rx_head;
750 do {
751 cur_rx = cur_rx->ste_next;
752 /* If the ring is empty, just return. */
753 if (cur_rx == sc->ste_cdata.ste_rx_head)
754 return;
755 } while (cur_rx->ste_ptr->ste_status == 0);
756 if (sc->ste_cdata.ste_rx_head->ste_ptr->ste_status == 0) {
757 /* We've fallen behind the chip: catch it. */
758 sc->ste_cdata.ste_rx_head = cur_rx;
759 ++ste_rxsyncs;
760 }
761 }
762 }
763
764 /*
765 * A frame has been uploaded: pass the resulting mbuf chain up to
766 * the higher level protocols.
767 */
768 static void
769 ste_rxeof(sc)
770 struct ste_softc *sc;
771 {
772 struct mbuf *m;
773 struct ifnet *ifp;
774 struct ste_chain_onefrag *cur_rx;
775 int total_len = 0, count=0;
776 u_int32_t rxstat;
777
778 STE_LOCK_ASSERT(sc);
779
780 ifp = sc->ste_ifp;
781
782 while((rxstat = sc->ste_cdata.ste_rx_head->ste_ptr->ste_status)
783 & STE_RXSTAT_DMADONE) {
784 #ifdef DEVICE_POLLING
785 if (ifp->if_capenable & IFCAP_POLLING) {
786 if (sc->rxcycles <= 0)
787 break;
788 sc->rxcycles--;
789 }
790 #endif
791 if ((STE_RX_LIST_CNT - count) < 3) {
792 break;
793 }
794
795 cur_rx = sc->ste_cdata.ste_rx_head;
796 sc->ste_cdata.ste_rx_head = cur_rx->ste_next;
797
798 /*
799 * If an error occurs, update stats, clear the
800 * status word and leave the mbuf cluster in place:
801 * it should simply get re-used next time this descriptor
802 * comes up in the ring.
803 */
804 if (rxstat & STE_RXSTAT_FRAME_ERR) {
805 ifp->if_ierrors++;
806 cur_rx->ste_ptr->ste_status = 0;
807 continue;
808 }
809
810 /*
811 * If there error bit was not set, the upload complete
812 * bit should be set which means we have a valid packet.
813 * If not, something truly strange has happened.
814 */
815 if (!(rxstat & STE_RXSTAT_DMADONE)) {
816 device_printf(sc->ste_dev,
817 "bad receive status -- packet dropped\n");
818 ifp->if_ierrors++;
819 cur_rx->ste_ptr->ste_status = 0;
820 continue;
821 }
822
823 /* No errors; receive the packet. */
824 m = cur_rx->ste_mbuf;
825 total_len = cur_rx->ste_ptr->ste_status & STE_RXSTAT_FRAMELEN;
826
827 /*
828 * Try to conjure up a new mbuf cluster. If that
829 * fails, it means we have an out of memory condition and
830 * should leave the buffer in place and continue. This will
831 * result in a lost packet, but there's little else we
832 * can do in this situation.
833 */
834 if (ste_newbuf(sc, cur_rx, NULL) == ENOBUFS) {
835 ifp->if_ierrors++;
836 cur_rx->ste_ptr->ste_status = 0;
837 continue;
838 }
839
840 m->m_pkthdr.rcvif = ifp;
841 m->m_pkthdr.len = m->m_len = total_len;
842
843 ifp->if_ipackets++;
844 STE_UNLOCK(sc);
845 (*ifp->if_input)(ifp, m);
846 STE_LOCK(sc);
847
848 cur_rx->ste_ptr->ste_status = 0;
849 count++;
850 }
851
852 return;
853 }
854
855 static void
856 ste_txeoc(sc)
857 struct ste_softc *sc;
858 {
859 u_int8_t txstat;
860 struct ifnet *ifp;
861
862 ifp = sc->ste_ifp;
863
864 while ((txstat = CSR_READ_1(sc, STE_TX_STATUS)) &
865 STE_TXSTATUS_TXDONE) {
866 if (txstat & STE_TXSTATUS_UNDERRUN ||
867 txstat & STE_TXSTATUS_EXCESSCOLLS ||
868 txstat & STE_TXSTATUS_RECLAIMERR) {
869 ifp->if_oerrors++;
870 device_printf(sc->ste_dev,
871 "transmission error: %x\n", txstat);
872
873 ste_reset(sc);
874 ste_init_locked(sc);
875
876 if (txstat & STE_TXSTATUS_UNDERRUN &&
877 sc->ste_tx_thresh < STE_PACKET_SIZE) {
878 sc->ste_tx_thresh += STE_MIN_FRAMELEN;
879 device_printf(sc->ste_dev,
880 "tx underrun, increasing tx"
881 " start threshold to %d bytes\n",
882 sc->ste_tx_thresh);
883 }
884 CSR_WRITE_2(sc, STE_TX_STARTTHRESH, sc->ste_tx_thresh);
885 CSR_WRITE_2(sc, STE_TX_RECLAIM_THRESH,
886 (STE_PACKET_SIZE >> 4));
887 }
888 ste_init_locked(sc);
889 CSR_WRITE_2(sc, STE_TX_STATUS, txstat);
890 }
891
892 return;
893 }
894
895 static void
896 ste_txeof(sc)
897 struct ste_softc *sc;
898 {
899 struct ste_chain *cur_tx;
900 struct ifnet *ifp;
901 int idx;
902
903 ifp = sc->ste_ifp;
904
905 idx = sc->ste_cdata.ste_tx_cons;
906 while(idx != sc->ste_cdata.ste_tx_prod) {
907 cur_tx = &sc->ste_cdata.ste_tx_chain[idx];
908
909 if (!(cur_tx->ste_ptr->ste_ctl & STE_TXCTL_DMADONE))
910 break;
911
912 m_freem(cur_tx->ste_mbuf);
913 cur_tx->ste_mbuf = NULL;
914 ifp->if_drv_flags &= ~IFF_DRV_OACTIVE;
915 ifp->if_opackets++;
916
917 STE_INC(idx, STE_TX_LIST_CNT);
918 }
919
920 sc->ste_cdata.ste_tx_cons = idx;
921 if (idx == sc->ste_cdata.ste_tx_prod)
922 ifp->if_timer = 0;
923 }
924
925 static void
926 ste_stats_update(xsc)
927 void *xsc;
928 {
929 struct ste_softc *sc;
930 struct ifnet *ifp;
931 struct mii_data *mii;
932
933 sc = xsc;
934 STE_LOCK_ASSERT(sc);
935
936 ifp = sc->ste_ifp;
937 mii = device_get_softc(sc->ste_miibus);
938
939 ifp->if_collisions += CSR_READ_1(sc, STE_LATE_COLLS)
940 + CSR_READ_1(sc, STE_MULTI_COLLS)
941 + CSR_READ_1(sc, STE_SINGLE_COLLS);
942
943 if (!sc->ste_link) {
944 mii_pollstat(mii);
945 if (mii->mii_media_status & IFM_ACTIVE &&
946 IFM_SUBTYPE(mii->mii_media_active) != IFM_NONE) {
947 sc->ste_link++;
948 /*
949 * we don't get a call-back on re-init so do it
950 * otherwise we get stuck in the wrong link state
951 */
952 ste_miibus_statchg(sc->ste_dev);
953 if (!IFQ_DRV_IS_EMPTY(&ifp->if_snd))
954 ste_start_locked(ifp);
955 }
956 }
957
958 callout_reset(&sc->ste_stat_callout, hz, ste_stats_update, sc);
959
960 return;
961 }
962
963
964 /*
965 * Probe for a Sundance ST201 chip. Check the PCI vendor and device
966 * IDs against our list and return a device name if we find a match.
967 */
968 static int
969 ste_probe(dev)
970 device_t dev;
971 {
972 struct ste_type *t;
973
974 t = ste_devs;
975
976 while(t->ste_name != NULL) {
977 if ((pci_get_vendor(dev) == t->ste_vid) &&
978 (pci_get_device(dev) == t->ste_did)) {
979 device_set_desc(dev, t->ste_name);
980 return (BUS_PROBE_DEFAULT);
981 }
982 t++;
983 }
984
985 return(ENXIO);
986 }
987
988 /*
989 * Attach the interface. Allocate softc structures, do ifmedia
990 * setup and ethernet/BPF attach.
991 */
992 static int
993 ste_attach(dev)
994 device_t dev;
995 {
996 struct ste_softc *sc;
997 struct ifnet *ifp;
998 int error = 0, rid;
999 u_char eaddr[6];
1000
1001 sc = device_get_softc(dev);
1002 sc->ste_dev = dev;
1003
1004 /*
1005 * Only use one PHY since this chip reports multiple
1006 * Note on the DFE-550 the PHY is at 1 on the DFE-580
1007 * it is at 0 & 1. It is rev 0x12.
1008 */
1009 if (pci_get_vendor(dev) == DL_VENDORID &&
1010 pci_get_device(dev) == DL_DEVICEID_DL10050 &&
1011 pci_get_revid(dev) == 0x12 )
1012 sc->ste_one_phy = 1;
1013
1014 mtx_init(&sc->ste_mtx, device_get_nameunit(dev), MTX_NETWORK_LOCK,
1015 MTX_DEF);
1016 /*
1017 * Map control/status registers.
1018 */
1019 pci_enable_busmaster(dev);
1020
1021 rid = STE_RID;
1022 sc->ste_res = bus_alloc_resource_any(dev, STE_RES, &rid, RF_ACTIVE);
1023
1024 if (sc->ste_res == NULL) {
1025 device_printf(dev, "couldn't map ports/memory\n");
1026 error = ENXIO;
1027 goto fail;
1028 }
1029
1030 sc->ste_btag = rman_get_bustag(sc->ste_res);
1031 sc->ste_bhandle = rman_get_bushandle(sc->ste_res);
1032
1033 /* Allocate interrupt */
1034 rid = 0;
1035 sc->ste_irq = bus_alloc_resource_any(dev, SYS_RES_IRQ, &rid,
1036 RF_SHAREABLE | RF_ACTIVE);
1037
1038 if (sc->ste_irq == NULL) {
1039 device_printf(dev, "couldn't map interrupt\n");
1040 error = ENXIO;
1041 goto fail;
1042 }
1043
1044 callout_init_mtx(&sc->ste_stat_callout, &sc->ste_mtx, 0);
1045
1046 /* Reset the adapter. */
1047 ste_reset(sc);
1048
1049 /*
1050 * Get station address from the EEPROM.
1051 */
1052 if (ste_read_eeprom(sc, eaddr,
1053 STE_EEADDR_NODE0, 3, 0)) {
1054 device_printf(dev, "failed to read station address\n");
1055 error = ENXIO;;
1056 goto fail;
1057 }
1058
1059 /* Allocate the descriptor queues. */
1060 sc->ste_ldata = contigmalloc(sizeof(struct ste_list_data), M_DEVBUF,
1061 M_NOWAIT, 0, 0xffffffff, PAGE_SIZE, 0);
1062
1063 if (sc->ste_ldata == NULL) {
1064 device_printf(dev, "no memory for list buffers!\n");
1065 error = ENXIO;
1066 goto fail;
1067 }
1068
1069 bzero(sc->ste_ldata, sizeof(struct ste_list_data));
1070
1071 ifp = sc->ste_ifp = if_alloc(IFT_ETHER);
1072 if (ifp == NULL) {
1073 device_printf(dev, "can not if_alloc()\n");
1074 error = ENOSPC;
1075 goto fail;
1076 }
1077
1078 /* Do MII setup. */
1079 if (mii_phy_probe(dev, &sc->ste_miibus,
1080 ste_ifmedia_upd, ste_ifmedia_sts)) {
1081 device_printf(dev, "MII without any phy!\n");
1082 error = ENXIO;
1083 goto fail;
1084 }
1085
1086 ifp->if_softc = sc;
1087 if_initname(ifp, device_get_name(dev), device_get_unit(dev));
1088 ifp->if_mtu = ETHERMTU;
1089 ifp->if_flags = IFF_BROADCAST | IFF_SIMPLEX | IFF_MULTICAST;
1090 ifp->if_ioctl = ste_ioctl;
1091 ifp->if_start = ste_start;
1092 ifp->if_watchdog = ste_watchdog;
1093 ifp->if_init = ste_init;
1094 IFQ_SET_MAXLEN(&ifp->if_snd, STE_TX_LIST_CNT - 1);
1095 ifp->if_snd.ifq_drv_maxlen = STE_TX_LIST_CNT - 1;
1096 IFQ_SET_READY(&ifp->if_snd);
1097
1098 sc->ste_tx_thresh = STE_TXSTART_THRESH;
1099
1100 /*
1101 * Call MI attach routine.
1102 */
1103 ether_ifattach(ifp, eaddr);
1104
1105 /*
1106 * Tell the upper layer(s) we support long frames.
1107 */
1108 ifp->if_data.ifi_hdrlen = sizeof(struct ether_vlan_header);
1109 ifp->if_capabilities |= IFCAP_VLAN_MTU;
1110 ifp->if_capenable = ifp->if_capabilities;
1111 #ifdef DEVICE_POLLING
1112 ifp->if_capabilities |= IFCAP_POLLING;
1113 #endif
1114
1115 /* Hook interrupt last to avoid having to lock softc */
1116 error = bus_setup_intr(dev, sc->ste_irq, INTR_TYPE_NET | INTR_MPSAFE,
1117 NULL, ste_intr, sc, &sc->ste_intrhand);
1118
1119 if (error) {
1120 device_printf(dev, "couldn't set up irq\n");
1121 ether_ifdetach(ifp);
1122 goto fail;
1123 }
1124
1125 fail:
1126 if (error)
1127 ste_detach(dev);
1128
1129 return(error);
1130 }
1131
1132 /*
1133 * Shutdown hardware and free up resources. This can be called any
1134 * time after the mutex has been initialized. It is called in both
1135 * the error case in attach and the normal detach case so it needs
1136 * to be careful about only freeing resources that have actually been
1137 * allocated.
1138 */
1139 static int
1140 ste_detach(dev)
1141 device_t dev;
1142 {
1143 struct ste_softc *sc;
1144 struct ifnet *ifp;
1145
1146 sc = device_get_softc(dev);
1147 KASSERT(mtx_initialized(&sc->ste_mtx), ("ste mutex not initialized"));
1148 ifp = sc->ste_ifp;
1149
1150 #ifdef DEVICE_POLLING
1151 if (ifp->if_capenable & IFCAP_POLLING)
1152 ether_poll_deregister(ifp);
1153 #endif
1154
1155 /* These should only be active if attach succeeded */
1156 if (device_is_attached(dev)) {
1157 STE_LOCK(sc);
1158 ste_stop(sc);
1159 STE_UNLOCK(sc);
1160 callout_drain(&sc->ste_stat_callout);
1161 ether_ifdetach(ifp);
1162 }
1163 if (sc->ste_miibus)
1164 device_delete_child(dev, sc->ste_miibus);
1165 bus_generic_detach(dev);
1166
1167 if (sc->ste_intrhand)
1168 bus_teardown_intr(dev, sc->ste_irq, sc->ste_intrhand);
1169 if (sc->ste_irq)
1170 bus_release_resource(dev, SYS_RES_IRQ, 0, sc->ste_irq);
1171 if (sc->ste_res)
1172 bus_release_resource(dev, STE_RES, STE_RID, sc->ste_res);
1173
1174 if (ifp)
1175 if_free(ifp);
1176
1177 if (sc->ste_ldata) {
1178 contigfree(sc->ste_ldata, sizeof(struct ste_list_data),
1179 M_DEVBUF);
1180 }
1181
1182 mtx_destroy(&sc->ste_mtx);
1183
1184 return(0);
1185 }
1186
1187 static int
1188 ste_newbuf(sc, c, m)
1189 struct ste_softc *sc;
1190 struct ste_chain_onefrag *c;
1191 struct mbuf *m;
1192 {
1193 struct mbuf *m_new = NULL;
1194
1195 if (m == NULL) {
1196 MGETHDR(m_new, M_DONTWAIT, MT_DATA);
1197 if (m_new == NULL)
1198 return(ENOBUFS);
1199 MCLGET(m_new, M_DONTWAIT);
1200 if (!(m_new->m_flags & M_EXT)) {
1201 m_freem(m_new);
1202 return(ENOBUFS);
1203 }
1204 m_new->m_len = m_new->m_pkthdr.len = MCLBYTES;
1205 } else {
1206 m_new = m;
1207 m_new->m_len = m_new->m_pkthdr.len = MCLBYTES;
1208 m_new->m_data = m_new->m_ext.ext_buf;
1209 }
1210
1211 m_adj(m_new, ETHER_ALIGN);
1212
1213 c->ste_mbuf = m_new;
1214 c->ste_ptr->ste_status = 0;
1215 c->ste_ptr->ste_frag.ste_addr = vtophys(mtod(m_new, caddr_t));
1216 c->ste_ptr->ste_frag.ste_len = (1536 + ETHER_VLAN_ENCAP_LEN) | STE_FRAG_LAST;
1217
1218 return(0);
1219 }
1220
1221 static int
1222 ste_init_rx_list(sc)
1223 struct ste_softc *sc;
1224 {
1225 struct ste_chain_data *cd;
1226 struct ste_list_data *ld;
1227 int i;
1228
1229 cd = &sc->ste_cdata;
1230 ld = sc->ste_ldata;
1231
1232 for (i = 0; i < STE_RX_LIST_CNT; i++) {
1233 cd->ste_rx_chain[i].ste_ptr = &ld->ste_rx_list[i];
1234 if (ste_newbuf(sc, &cd->ste_rx_chain[i], NULL) == ENOBUFS)
1235 return(ENOBUFS);
1236 if (i == (STE_RX_LIST_CNT - 1)) {
1237 cd->ste_rx_chain[i].ste_next =
1238 &cd->ste_rx_chain[0];
1239 ld->ste_rx_list[i].ste_next =
1240 vtophys(&ld->ste_rx_list[0]);
1241 } else {
1242 cd->ste_rx_chain[i].ste_next =
1243 &cd->ste_rx_chain[i + 1];
1244 ld->ste_rx_list[i].ste_next =
1245 vtophys(&ld->ste_rx_list[i + 1]);
1246 }
1247 ld->ste_rx_list[i].ste_status = 0;
1248 }
1249
1250 cd->ste_rx_head = &cd->ste_rx_chain[0];
1251
1252 return(0);
1253 }
1254
1255 static void
1256 ste_init_tx_list(sc)
1257 struct ste_softc *sc;
1258 {
1259 struct ste_chain_data *cd;
1260 struct ste_list_data *ld;
1261 int i;
1262
1263 cd = &sc->ste_cdata;
1264 ld = sc->ste_ldata;
1265 for (i = 0; i < STE_TX_LIST_CNT; i++) {
1266 cd->ste_tx_chain[i].ste_ptr = &ld->ste_tx_list[i];
1267 cd->ste_tx_chain[i].ste_ptr->ste_next = 0;
1268 cd->ste_tx_chain[i].ste_ptr->ste_ctl = 0;
1269 cd->ste_tx_chain[i].ste_phys = vtophys(&ld->ste_tx_list[i]);
1270 if (i == (STE_TX_LIST_CNT - 1))
1271 cd->ste_tx_chain[i].ste_next =
1272 &cd->ste_tx_chain[0];
1273 else
1274 cd->ste_tx_chain[i].ste_next =
1275 &cd->ste_tx_chain[i + 1];
1276 }
1277
1278 cd->ste_tx_prod = 0;
1279 cd->ste_tx_cons = 0;
1280
1281 return;
1282 }
1283
1284 static void
1285 ste_init(xsc)
1286 void *xsc;
1287 {
1288 struct ste_softc *sc;
1289
1290 sc = xsc;
1291 STE_LOCK(sc);
1292 ste_init_locked(sc);
1293 STE_UNLOCK(sc);
1294 }
1295
1296 static void
1297 ste_init_locked(sc)
1298 struct ste_softc *sc;
1299 {
1300 int i;
1301 struct ifnet *ifp;
1302
1303 STE_LOCK_ASSERT(sc);
1304 ifp = sc->ste_ifp;
1305
1306 ste_stop(sc);
1307
1308 /* Init our MAC address */
1309 for (i = 0; i < ETHER_ADDR_LEN; i += 2) {
1310 CSR_WRITE_2(sc, STE_PAR0 + i,
1311 ((IF_LLADDR(sc->ste_ifp)[i] & 0xff) |
1312 IF_LLADDR(sc->ste_ifp)[i + 1] << 8));
1313 }
1314
1315 /* Init RX list */
1316 if (ste_init_rx_list(sc) == ENOBUFS) {
1317 device_printf(sc->ste_dev,
1318 "initialization failed: no memory for RX buffers\n");
1319 ste_stop(sc);
1320 return;
1321 }
1322
1323 /* Set RX polling interval */
1324 CSR_WRITE_1(sc, STE_RX_DMAPOLL_PERIOD, 64);
1325
1326 /* Init TX descriptors */
1327 ste_init_tx_list(sc);
1328
1329 /* Set the TX freethresh value */
1330 CSR_WRITE_1(sc, STE_TX_DMABURST_THRESH, STE_PACKET_SIZE >> 8);
1331
1332 /* Set the TX start threshold for best performance. */
1333 CSR_WRITE_2(sc, STE_TX_STARTTHRESH, sc->ste_tx_thresh);
1334
1335 /* Set the TX reclaim threshold. */
1336 CSR_WRITE_1(sc, STE_TX_RECLAIM_THRESH, (STE_PACKET_SIZE >> 4));
1337
1338 /* Set up the RX filter. */
1339 CSR_WRITE_1(sc, STE_RX_MODE, STE_RXMODE_UNICAST);
1340
1341 /* If we want promiscuous mode, set the allframes bit. */
1342 if (ifp->if_flags & IFF_PROMISC) {
1343 STE_SETBIT1(sc, STE_RX_MODE, STE_RXMODE_PROMISC);
1344 } else {
1345 STE_CLRBIT1(sc, STE_RX_MODE, STE_RXMODE_PROMISC);
1346 }
1347
1348 /* Set capture broadcast bit to accept broadcast frames. */
1349 if (ifp->if_flags & IFF_BROADCAST) {
1350 STE_SETBIT1(sc, STE_RX_MODE, STE_RXMODE_BROADCAST);
1351 } else {
1352 STE_CLRBIT1(sc, STE_RX_MODE, STE_RXMODE_BROADCAST);
1353 }
1354
1355 ste_setmulti(sc);
1356
1357 /* Load the address of the RX list. */
1358 STE_SETBIT4(sc, STE_DMACTL, STE_DMACTL_RXDMA_STALL);
1359 ste_wait(sc);
1360 CSR_WRITE_4(sc, STE_RX_DMALIST_PTR,
1361 vtophys(&sc->ste_ldata->ste_rx_list[0]));
1362 STE_SETBIT4(sc, STE_DMACTL, STE_DMACTL_RXDMA_UNSTALL);
1363 STE_SETBIT4(sc, STE_DMACTL, STE_DMACTL_RXDMA_UNSTALL);
1364
1365 /* Set TX polling interval (defer until we TX first packet */
1366 CSR_WRITE_1(sc, STE_TX_DMAPOLL_PERIOD, 0);
1367
1368 /* Load address of the TX list */
1369 STE_SETBIT4(sc, STE_DMACTL, STE_DMACTL_TXDMA_STALL);
1370 ste_wait(sc);
1371 CSR_WRITE_4(sc, STE_TX_DMALIST_PTR, 0);
1372 STE_SETBIT4(sc, STE_DMACTL, STE_DMACTL_TXDMA_UNSTALL);
1373 STE_SETBIT4(sc, STE_DMACTL, STE_DMACTL_TXDMA_UNSTALL);
1374 ste_wait(sc);
1375 sc->ste_tx_prev = NULL;
1376
1377 /* Enable receiver and transmitter */
1378 CSR_WRITE_2(sc, STE_MACCTL0, 0);
1379 CSR_WRITE_2(sc, STE_MACCTL1, 0);
1380 STE_SETBIT2(sc, STE_MACCTL1, STE_MACCTL1_TX_ENABLE);
1381 STE_SETBIT2(sc, STE_MACCTL1, STE_MACCTL1_RX_ENABLE);
1382
1383 /* Enable stats counters. */
1384 STE_SETBIT2(sc, STE_MACCTL1, STE_MACCTL1_STATS_ENABLE);
1385
1386 CSR_WRITE_2(sc, STE_ISR, 0xFFFF);
1387 #ifdef DEVICE_POLLING
1388 /* Disable interrupts if we are polling. */
1389 if (ifp->if_capenable & IFCAP_POLLING)
1390 CSR_WRITE_2(sc, STE_IMR, 0);
1391 else
1392 #endif
1393 /* Enable interrupts. */
1394 CSR_WRITE_2(sc, STE_IMR, STE_INTRS);
1395
1396 /* Accept VLAN length packets */
1397 CSR_WRITE_2(sc, STE_MAX_FRAMELEN, ETHER_MAX_LEN + ETHER_VLAN_ENCAP_LEN);
1398
1399 ste_ifmedia_upd_locked(ifp);
1400
1401 ifp->if_drv_flags |= IFF_DRV_RUNNING;
1402 ifp->if_drv_flags &= ~IFF_DRV_OACTIVE;
1403
1404 callout_reset(&sc->ste_stat_callout, hz, ste_stats_update, sc);
1405
1406 return;
1407 }
1408
1409 static void
1410 ste_stop(sc)
1411 struct ste_softc *sc;
1412 {
1413 int i;
1414 struct ifnet *ifp;
1415
1416 STE_LOCK_ASSERT(sc);
1417 ifp = sc->ste_ifp;
1418
1419 callout_stop(&sc->ste_stat_callout);
1420 ifp->if_drv_flags &= ~(IFF_DRV_RUNNING|IFF_DRV_OACTIVE);
1421
1422 CSR_WRITE_2(sc, STE_IMR, 0);
1423 STE_SETBIT2(sc, STE_MACCTL1, STE_MACCTL1_TX_DISABLE);
1424 STE_SETBIT2(sc, STE_MACCTL1, STE_MACCTL1_RX_DISABLE);
1425 STE_SETBIT2(sc, STE_MACCTL1, STE_MACCTL1_STATS_DISABLE);
1426 STE_SETBIT2(sc, STE_DMACTL, STE_DMACTL_TXDMA_STALL);
1427 STE_SETBIT2(sc, STE_DMACTL, STE_DMACTL_RXDMA_STALL);
1428 ste_wait(sc);
1429 /*
1430 * Try really hard to stop the RX engine or under heavy RX
1431 * data chip will write into de-allocated memory.
1432 */
1433 ste_reset(sc);
1434
1435 sc->ste_link = 0;
1436
1437 for (i = 0; i < STE_RX_LIST_CNT; i++) {
1438 if (sc->ste_cdata.ste_rx_chain[i].ste_mbuf != NULL) {
1439 m_freem(sc->ste_cdata.ste_rx_chain[i].ste_mbuf);
1440 sc->ste_cdata.ste_rx_chain[i].ste_mbuf = NULL;
1441 }
1442 }
1443
1444 for (i = 0; i < STE_TX_LIST_CNT; i++) {
1445 if (sc->ste_cdata.ste_tx_chain[i].ste_mbuf != NULL) {
1446 m_freem(sc->ste_cdata.ste_tx_chain[i].ste_mbuf);
1447 sc->ste_cdata.ste_tx_chain[i].ste_mbuf = NULL;
1448 }
1449 }
1450
1451 bzero(sc->ste_ldata, sizeof(struct ste_list_data));
1452
1453 return;
1454 }
1455
1456 static void
1457 ste_reset(sc)
1458 struct ste_softc *sc;
1459 {
1460 int i;
1461
1462 STE_SETBIT4(sc, STE_ASICCTL,
1463 STE_ASICCTL_GLOBAL_RESET|STE_ASICCTL_RX_RESET|
1464 STE_ASICCTL_TX_RESET|STE_ASICCTL_DMA_RESET|
1465 STE_ASICCTL_FIFO_RESET|STE_ASICCTL_NETWORK_RESET|
1466 STE_ASICCTL_AUTOINIT_RESET|STE_ASICCTL_HOST_RESET|
1467 STE_ASICCTL_EXTRESET_RESET);
1468
1469 DELAY(100000);
1470
1471 for (i = 0; i < STE_TIMEOUT; i++) {
1472 if (!(CSR_READ_4(sc, STE_ASICCTL) & STE_ASICCTL_RESET_BUSY))
1473 break;
1474 }
1475
1476 if (i == STE_TIMEOUT)
1477 device_printf(sc->ste_dev, "global reset never completed\n");
1478
1479 return;
1480 }
1481
1482 static int
1483 ste_ioctl(ifp, command, data)
1484 struct ifnet *ifp;
1485 u_long command;
1486 caddr_t data;
1487 {
1488 struct ste_softc *sc;
1489 struct ifreq *ifr;
1490 struct mii_data *mii;
1491 int error = 0;
1492
1493 sc = ifp->if_softc;
1494 ifr = (struct ifreq *)data;
1495
1496 switch(command) {
1497 case SIOCSIFFLAGS:
1498 STE_LOCK(sc);
1499 if (ifp->if_flags & IFF_UP) {
1500 if (ifp->if_drv_flags & IFF_DRV_RUNNING &&
1501 ifp->if_flags & IFF_PROMISC &&
1502 !(sc->ste_if_flags & IFF_PROMISC)) {
1503 STE_SETBIT1(sc, STE_RX_MODE,
1504 STE_RXMODE_PROMISC);
1505 } else if (ifp->if_drv_flags & IFF_DRV_RUNNING &&
1506 !(ifp->if_flags & IFF_PROMISC) &&
1507 sc->ste_if_flags & IFF_PROMISC) {
1508 STE_CLRBIT1(sc, STE_RX_MODE,
1509 STE_RXMODE_PROMISC);
1510 }
1511 if (ifp->if_drv_flags & IFF_DRV_RUNNING &&
1512 (ifp->if_flags ^ sc->ste_if_flags) & IFF_ALLMULTI)
1513 ste_setmulti(sc);
1514 if (!(ifp->if_drv_flags & IFF_DRV_RUNNING)) {
1515 sc->ste_tx_thresh = STE_TXSTART_THRESH;
1516 ste_init_locked(sc);
1517 }
1518 } else {
1519 if (ifp->if_drv_flags & IFF_DRV_RUNNING)
1520 ste_stop(sc);
1521 }
1522 sc->ste_if_flags = ifp->if_flags;
1523 STE_UNLOCK(sc);
1524 error = 0;
1525 break;
1526 case SIOCADDMULTI:
1527 case SIOCDELMULTI:
1528 STE_LOCK(sc);
1529 ste_setmulti(sc);
1530 STE_UNLOCK(sc);
1531 error = 0;
1532 break;
1533 case SIOCGIFMEDIA:
1534 case SIOCSIFMEDIA:
1535 mii = device_get_softc(sc->ste_miibus);
1536 error = ifmedia_ioctl(ifp, ifr, &mii->mii_media, command);
1537 break;
1538 case SIOCSIFCAP:
1539 #ifdef DEVICE_POLLING
1540 if (ifr->ifr_reqcap & IFCAP_POLLING &&
1541 !(ifp->if_capenable & IFCAP_POLLING)) {
1542 error = ether_poll_register(ste_poll, ifp);
1543 if (error)
1544 return(error);
1545 STE_LOCK(sc);
1546 /* Disable interrupts */
1547 CSR_WRITE_2(sc, STE_IMR, 0);
1548 ifp->if_capenable |= IFCAP_POLLING;
1549 STE_UNLOCK(sc);
1550 return (error);
1551
1552 }
1553 if (!(ifr->ifr_reqcap & IFCAP_POLLING) &&
1554 ifp->if_capenable & IFCAP_POLLING) {
1555 error = ether_poll_deregister(ifp);
1556 /* Enable interrupts. */
1557 STE_LOCK(sc);
1558 CSR_WRITE_2(sc, STE_IMR, STE_INTRS);
1559 ifp->if_capenable &= ~IFCAP_POLLING;
1560 STE_UNLOCK(sc);
1561 return (error);
1562 }
1563 #endif /* DEVICE_POLLING */
1564 break;
1565 default:
1566 error = ether_ioctl(ifp, command, data);
1567 break;
1568 }
1569
1570 return(error);
1571 }
1572
1573 static int
1574 ste_encap(sc, c, m_head)
1575 struct ste_softc *sc;
1576 struct ste_chain *c;
1577 struct mbuf *m_head;
1578 {
1579 int frag = 0;
1580 struct ste_frag *f = NULL;
1581 struct mbuf *m;
1582 struct ste_desc *d;
1583
1584 d = c->ste_ptr;
1585 d->ste_ctl = 0;
1586
1587 encap_retry:
1588 for (m = m_head, frag = 0; m != NULL; m = m->m_next) {
1589 if (m->m_len != 0) {
1590 if (frag == STE_MAXFRAGS)
1591 break;
1592 f = &d->ste_frags[frag];
1593 f->ste_addr = vtophys(mtod(m, vm_offset_t));
1594 f->ste_len = m->m_len;
1595 frag++;
1596 }
1597 }
1598
1599 if (m != NULL) {
1600 struct mbuf *mn;
1601
1602 /*
1603 * We ran out of segments. We have to recopy this
1604 * mbuf chain first. Bail out if we can't get the
1605 * new buffers.
1606 */
1607 mn = m_defrag(m_head, M_DONTWAIT);
1608 if (mn == NULL) {
1609 m_freem(m_head);
1610 return ENOMEM;
1611 }
1612 m_head = mn;
1613 goto encap_retry;
1614 }
1615
1616 c->ste_mbuf = m_head;
1617 d->ste_frags[frag - 1].ste_len |= STE_FRAG_LAST;
1618 d->ste_ctl = 1;
1619
1620 return(0);
1621 }
1622
1623 static void
1624 ste_start(ifp)
1625 struct ifnet *ifp;
1626 {
1627 struct ste_softc *sc;
1628
1629 sc = ifp->if_softc;
1630 STE_LOCK(sc);
1631 ste_start_locked(ifp);
1632 STE_UNLOCK(sc);
1633 }
1634
1635 static void
1636 ste_start_locked(ifp)
1637 struct ifnet *ifp;
1638 {
1639 struct ste_softc *sc;
1640 struct mbuf *m_head = NULL;
1641 struct ste_chain *cur_tx;
1642 int idx;
1643
1644 sc = ifp->if_softc;
1645 STE_LOCK_ASSERT(sc);
1646
1647 if (!sc->ste_link)
1648 return;
1649
1650 if (ifp->if_drv_flags & IFF_DRV_OACTIVE)
1651 return;
1652
1653 idx = sc->ste_cdata.ste_tx_prod;
1654
1655 while(sc->ste_cdata.ste_tx_chain[idx].ste_mbuf == NULL) {
1656 /*
1657 * We cannot re-use the last (free) descriptor;
1658 * the chip may not have read its ste_next yet.
1659 */
1660 if (STE_NEXT(idx, STE_TX_LIST_CNT) ==
1661 sc->ste_cdata.ste_tx_cons) {
1662 ifp->if_drv_flags |= IFF_DRV_OACTIVE;
1663 break;
1664 }
1665
1666 IFQ_DRV_DEQUEUE(&ifp->if_snd, m_head);
1667 if (m_head == NULL)
1668 break;
1669
1670 cur_tx = &sc->ste_cdata.ste_tx_chain[idx];
1671
1672 if (ste_encap(sc, cur_tx, m_head) != 0)
1673 break;
1674
1675 cur_tx->ste_ptr->ste_next = 0;
1676
1677 if (sc->ste_tx_prev == NULL) {
1678 cur_tx->ste_ptr->ste_ctl = STE_TXCTL_DMAINTR | 1;
1679 /* Load address of the TX list */
1680 STE_SETBIT4(sc, STE_DMACTL, STE_DMACTL_TXDMA_STALL);
1681 ste_wait(sc);
1682
1683 CSR_WRITE_4(sc, STE_TX_DMALIST_PTR,
1684 vtophys(&sc->ste_ldata->ste_tx_list[0]));
1685
1686 /* Set TX polling interval to start TX engine */
1687 CSR_WRITE_1(sc, STE_TX_DMAPOLL_PERIOD, 64);
1688
1689 STE_SETBIT4(sc, STE_DMACTL, STE_DMACTL_TXDMA_UNSTALL);
1690 ste_wait(sc);
1691 }else{
1692 cur_tx->ste_ptr->ste_ctl = STE_TXCTL_DMAINTR | 1;
1693 sc->ste_tx_prev->ste_ptr->ste_next
1694 = cur_tx->ste_phys;
1695 }
1696
1697 sc->ste_tx_prev = cur_tx;
1698
1699 /*
1700 * If there's a BPF listener, bounce a copy of this frame
1701 * to him.
1702 */
1703 BPF_MTAP(ifp, cur_tx->ste_mbuf);
1704
1705 STE_INC(idx, STE_TX_LIST_CNT);
1706 ifp->if_timer = 5;
1707 }
1708 sc->ste_cdata.ste_tx_prod = idx;
1709
1710 return;
1711 }
1712
1713 static void
1714 ste_watchdog(ifp)
1715 struct ifnet *ifp;
1716 {
1717 struct ste_softc *sc;
1718
1719 sc = ifp->if_softc;
1720 STE_LOCK(sc);
1721
1722 ifp->if_oerrors++;
1723 if_printf(ifp, "watchdog timeout\n");
1724
1725 ste_txeoc(sc);
1726 ste_txeof(sc);
1727 ste_rxeoc(sc);
1728 ste_rxeof(sc);
1729 ste_reset(sc);
1730 ste_init_locked(sc);
1731
1732 if (!IFQ_DRV_IS_EMPTY(&ifp->if_snd))
1733 ste_start_locked(ifp);
1734 STE_UNLOCK(sc);
1735
1736 return;
1737 }
1738
1739 static int
1740 ste_shutdown(dev)
1741 device_t dev;
1742 {
1743 struct ste_softc *sc;
1744
1745 sc = device_get_softc(dev);
1746
1747 STE_LOCK(sc);
1748 ste_stop(sc);
1749 STE_UNLOCK(sc);
1750
1751 return (0);
1752 }
Cache object: c08dd008a5225c5390236bdc1f81e7fb
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