1 /*-
2 * SPDX-License-Identifier: BSD-2-Clause-FreeBSD
3 *
4 * Copyright (c) 1997 Semen Ustimenko ([email protected])
5 * All rights reserved.
6 *
7 * Redistribution and use in source and binary forms, with or without
8 * modification, are permitted provided that the following conditions
9 * are met:
10 * 1. Redistributions of source code must retain the above copyright
11 * notice, this list of conditions and the following disclaimer.
12 * 2. Redistributions in binary form must reproduce the above copyright
13 * notice, this list of conditions and the following disclaimer in the
14 * documentation and/or other materials provided with the distribution.
15 *
16 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
17 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
18 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
19 * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
20 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
21 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
22 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
23 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
24 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
25 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
26 * SUCH DAMAGE.
27 */
28
29 #include <sys/cdefs.h>
30 __FBSDID("$FreeBSD$");
31
32 /*
33 * EtherPower II 10/100 Fast Ethernet (SMC 9432 serie)
34 *
35 * These cards are based on SMC83c17x (EPIC) chip and one of the various
36 * PHYs (QS6612, AC101 and LXT970 were seen). The media support depends on
37 * card model. All cards support 10baseT/UTP and 100baseTX half- and full-
38 * duplex (SMB9432TX). SMC9432BTX also supports 10baseT/BNC. SMC9432FTX also
39 * supports fibre optics.
40 *
41 * Thanks are going to Steve Bauer and Jason Wright.
42 */
43
44 #include <sys/param.h>
45 #include <sys/systm.h>
46 #include <sys/sockio.h>
47 #include <sys/mbuf.h>
48 #include <sys/kernel.h>
49 #include <sys/malloc.h>
50 #include <sys/module.h>
51 #include <sys/socket.h>
52 #include <sys/queue.h>
53
54 #include <net/if.h>
55 #include <net/if_var.h>
56 #include <net/if_arp.h>
57 #include <net/ethernet.h>
58 #include <net/if_dl.h>
59 #include <net/if_media.h>
60 #include <net/if_types.h>
61
62 #include <net/bpf.h>
63
64 #include <net/if_vlan_var.h>
65
66 #include <machine/bus.h>
67 #include <machine/resource.h>
68 #include <sys/bus.h>
69 #include <sys/rman.h>
70
71 #include <dev/pci/pcireg.h>
72 #include <dev/pci/pcivar.h>
73
74 #include <dev/mii/mii.h>
75 #include <dev/mii/miivar.h>
76 #include "miidevs.h"
77
78 #include <dev/mii/lxtphyreg.h>
79
80 #include "miibus_if.h"
81
82 #include <dev/tx/if_txreg.h>
83 #include <dev/tx/if_txvar.h>
84
85 MODULE_DEPEND(tx, pci, 1, 1, 1);
86 MODULE_DEPEND(tx, ether, 1, 1, 1);
87 MODULE_DEPEND(tx, miibus, 1, 1, 1);
88
89 static int epic_ifioctl(struct ifnet *, u_long, caddr_t);
90 static void epic_intr(void *);
91 static void epic_tx_underrun(epic_softc_t *);
92 static void epic_ifstart(struct ifnet *);
93 static void epic_ifstart_locked(struct ifnet *);
94 static void epic_timer(void *);
95 static void epic_init(void *);
96 static void epic_init_locked(epic_softc_t *);
97 static void epic_stop(epic_softc_t *);
98 static void epic_rx_done(epic_softc_t *);
99 static void epic_tx_done(epic_softc_t *);
100 static int epic_init_rings(epic_softc_t *);
101 static void epic_free_rings(epic_softc_t *);
102 static void epic_stop_activity(epic_softc_t *);
103 static int epic_queue_last_packet(epic_softc_t *);
104 static void epic_start_activity(epic_softc_t *);
105 static void epic_set_rx_mode(epic_softc_t *);
106 static void epic_set_tx_mode(epic_softc_t *);
107 static void epic_set_mc_table(epic_softc_t *);
108 static int epic_read_eeprom(epic_softc_t *,u_int16_t);
109 static void epic_output_eepromw(epic_softc_t *, u_int16_t);
110 static u_int16_t epic_input_eepromw(epic_softc_t *);
111 static u_int8_t epic_eeprom_clock(epic_softc_t *,u_int8_t);
112 static void epic_write_eepromreg(epic_softc_t *,u_int8_t);
113 static u_int8_t epic_read_eepromreg(epic_softc_t *);
114
115 static int epic_read_phy_reg(epic_softc_t *, int, int);
116 static void epic_write_phy_reg(epic_softc_t *, int, int, int);
117
118 static int epic_miibus_readreg(device_t, int, int);
119 static int epic_miibus_writereg(device_t, int, int, int);
120 static void epic_miibus_statchg(device_t);
121 static void epic_miibus_mediainit(device_t);
122
123 static int epic_ifmedia_upd(struct ifnet *);
124 static int epic_ifmedia_upd_locked(struct ifnet *);
125 static void epic_ifmedia_sts(struct ifnet *, struct ifmediareq *);
126
127 static int epic_probe(device_t);
128 static int epic_attach(device_t);
129 static int epic_shutdown(device_t);
130 static int epic_detach(device_t);
131 static void epic_release(epic_softc_t *);
132 static struct epic_type *epic_devtype(device_t);
133
134 static device_method_t epic_methods[] = {
135 /* Device interface */
136 DEVMETHOD(device_probe, epic_probe),
137 DEVMETHOD(device_attach, epic_attach),
138 DEVMETHOD(device_detach, epic_detach),
139 DEVMETHOD(device_shutdown, epic_shutdown),
140
141 /* MII interface */
142 DEVMETHOD(miibus_readreg, epic_miibus_readreg),
143 DEVMETHOD(miibus_writereg, epic_miibus_writereg),
144 DEVMETHOD(miibus_statchg, epic_miibus_statchg),
145 DEVMETHOD(miibus_mediainit, epic_miibus_mediainit),
146
147 { 0, 0 }
148 };
149
150 static driver_t epic_driver = {
151 "tx",
152 epic_methods,
153 sizeof(epic_softc_t)
154 };
155
156 static devclass_t epic_devclass;
157
158 DRIVER_MODULE(tx, pci, epic_driver, epic_devclass, 0, 0);
159 DRIVER_MODULE(miibus, tx, miibus_driver, miibus_devclass, 0, 0);
160
161 static struct epic_type epic_devs[] = {
162 { SMC_VENDORID, SMC_DEVICEID_83C170, "SMC EtherPower II 10/100" },
163 { 0, 0, NULL }
164 };
165
166 static int
epic_probe(device_t dev)167 epic_probe(device_t dev)
168 {
169 struct epic_type *t;
170
171 t = epic_devtype(dev);
172
173 if (t != NULL) {
174 device_set_desc(dev, t->name);
175 return (BUS_PROBE_DEFAULT);
176 }
177
178 return (ENXIO);
179 }
180
181 static struct epic_type *
epic_devtype(device_t dev)182 epic_devtype(device_t dev)
183 {
184 struct epic_type *t;
185
186 t = epic_devs;
187
188 while (t->name != NULL) {
189 if ((pci_get_vendor(dev) == t->ven_id) &&
190 (pci_get_device(dev) == t->dev_id)) {
191 return (t);
192 }
193 t++;
194 }
195 return (NULL);
196 }
197
198 #ifdef EPIC_USEIOSPACE
199 #define EPIC_RES SYS_RES_IOPORT
200 #define EPIC_RID PCIR_BASEIO
201 #else
202 #define EPIC_RES SYS_RES_MEMORY
203 #define EPIC_RID PCIR_BASEMEM
204 #endif
205
206 static void
epic_dma_map_addr(void * arg,bus_dma_segment_t * segs,int nseg,int error)207 epic_dma_map_addr(void *arg, bus_dma_segment_t *segs, int nseg, int error)
208 {
209 u_int32_t *addr;
210
211 if (error)
212 return;
213
214 KASSERT(nseg == 1, ("too many DMA segments, %d should be 1", nseg));
215 addr = arg;
216 *addr = segs->ds_addr;
217 }
218
219 /*
220 * Attach routine: map registers, allocate softc, rings and descriptors.
221 * Reset to known state.
222 */
223 static int
epic_attach(device_t dev)224 epic_attach(device_t dev)
225 {
226 struct ifnet *ifp;
227 epic_softc_t *sc;
228 int error;
229 int i, rid, tmp;
230 u_char eaddr[6];
231
232 sc = device_get_softc(dev);
233
234 /* Preinitialize softc structure. */
235 sc->dev = dev;
236 mtx_init(&sc->lock, device_get_nameunit(dev), MTX_NETWORK_LOCK,
237 MTX_DEF);
238
239 /* Fill ifnet structure. */
240 ifp = sc->ifp = if_alloc(IFT_ETHER);
241 if (ifp == NULL) {
242 device_printf(dev, "can not if_alloc()\n");
243 error = ENOSPC;
244 goto fail;
245 }
246 if_initname(ifp, device_get_name(dev), device_get_unit(dev));
247 ifp->if_softc = sc;
248 ifp->if_flags = IFF_BROADCAST|IFF_SIMPLEX|IFF_MULTICAST;
249 ifp->if_ioctl = epic_ifioctl;
250 ifp->if_start = epic_ifstart;
251 ifp->if_init = epic_init;
252 IFQ_SET_MAXLEN(&ifp->if_snd, TX_RING_SIZE - 1);
253
254 /* Enable busmastering. */
255 pci_enable_busmaster(dev);
256
257 rid = EPIC_RID;
258 sc->res = bus_alloc_resource_any(dev, EPIC_RES, &rid, RF_ACTIVE);
259 if (sc->res == NULL) {
260 device_printf(dev, "couldn't map ports/memory\n");
261 error = ENXIO;
262 goto fail;
263 }
264
265 /* Allocate interrupt. */
266 rid = 0;
267 sc->irq = bus_alloc_resource_any(dev, SYS_RES_IRQ, &rid,
268 RF_SHAREABLE | RF_ACTIVE);
269 if (sc->irq == NULL) {
270 device_printf(dev, "couldn't map interrupt\n");
271 error = ENXIO;
272 goto fail;
273 }
274
275 /* Allocate DMA tags. */
276 error = bus_dma_tag_create(bus_get_dma_tag(dev), 4, 0,
277 BUS_SPACE_MAXADDR_32BIT, BUS_SPACE_MAXADDR, NULL, NULL,
278 MCLBYTES * EPIC_MAX_FRAGS, EPIC_MAX_FRAGS, MCLBYTES, 0, NULL, NULL,
279 &sc->mtag);
280 if (error) {
281 device_printf(dev, "couldn't allocate dma tag\n");
282 goto fail;
283 }
284
285 error = bus_dma_tag_create(bus_get_dma_tag(dev), 4, 0,
286 BUS_SPACE_MAXADDR_32BIT, BUS_SPACE_MAXADDR, NULL, NULL,
287 sizeof(struct epic_rx_desc) * RX_RING_SIZE,
288 1, sizeof(struct epic_rx_desc) * RX_RING_SIZE, 0, NULL,
289 NULL, &sc->rtag);
290 if (error) {
291 device_printf(dev, "couldn't allocate dma tag\n");
292 goto fail;
293 }
294
295 error = bus_dma_tag_create(bus_get_dma_tag(dev), 4, 0,
296 BUS_SPACE_MAXADDR_32BIT, BUS_SPACE_MAXADDR, NULL, NULL,
297 sizeof(struct epic_tx_desc) * TX_RING_SIZE,
298 1, sizeof(struct epic_tx_desc) * TX_RING_SIZE, 0,
299 NULL, NULL, &sc->ttag);
300 if (error) {
301 device_printf(dev, "couldn't allocate dma tag\n");
302 goto fail;
303 }
304
305 error = bus_dma_tag_create(bus_get_dma_tag(dev), 4, 0,
306 BUS_SPACE_MAXADDR_32BIT, BUS_SPACE_MAXADDR, NULL, NULL,
307 sizeof(struct epic_frag_list) * TX_RING_SIZE,
308 1, sizeof(struct epic_frag_list) * TX_RING_SIZE, 0,
309 NULL, NULL, &sc->ftag);
310 if (error) {
311 device_printf(dev, "couldn't allocate dma tag\n");
312 goto fail;
313 }
314
315 /* Allocate DMA safe memory and get the DMA addresses. */
316 error = bus_dmamem_alloc(sc->ftag, (void **)&sc->tx_flist,
317 BUS_DMA_NOWAIT | BUS_DMA_ZERO, &sc->fmap);
318 if (error) {
319 device_printf(dev, "couldn't allocate dma memory\n");
320 goto fail;
321 }
322 error = bus_dmamap_load(sc->ftag, sc->fmap, sc->tx_flist,
323 sizeof(struct epic_frag_list) * TX_RING_SIZE, epic_dma_map_addr,
324 &sc->frag_addr, 0);
325 if (error) {
326 device_printf(dev, "couldn't map dma memory\n");
327 goto fail;
328 }
329 error = bus_dmamem_alloc(sc->ttag, (void **)&sc->tx_desc,
330 BUS_DMA_NOWAIT | BUS_DMA_ZERO, &sc->tmap);
331 if (error) {
332 device_printf(dev, "couldn't allocate dma memory\n");
333 goto fail;
334 }
335 error = bus_dmamap_load(sc->ttag, sc->tmap, sc->tx_desc,
336 sizeof(struct epic_tx_desc) * TX_RING_SIZE, epic_dma_map_addr,
337 &sc->tx_addr, 0);
338 if (error) {
339 device_printf(dev, "couldn't map dma memory\n");
340 goto fail;
341 }
342 error = bus_dmamem_alloc(sc->rtag, (void **)&sc->rx_desc,
343 BUS_DMA_NOWAIT | BUS_DMA_ZERO, &sc->rmap);
344 if (error) {
345 device_printf(dev, "couldn't allocate dma memory\n");
346 goto fail;
347 }
348 error = bus_dmamap_load(sc->rtag, sc->rmap, sc->rx_desc,
349 sizeof(struct epic_rx_desc) * RX_RING_SIZE, epic_dma_map_addr,
350 &sc->rx_addr, 0);
351 if (error) {
352 device_printf(dev, "couldn't map dma memory\n");
353 goto fail;
354 }
355
356 /* Bring the chip out of low-power mode. */
357 CSR_WRITE_4(sc, GENCTL, GENCTL_SOFT_RESET);
358 DELAY(500);
359
360 /* Workaround for Application Note 7-15. */
361 for (i = 0; i < 16; i++)
362 CSR_WRITE_4(sc, TEST1, TEST1_CLOCK_TEST);
363
364 /* Read MAC address from EEPROM. */
365 for (i = 0; i < ETHER_ADDR_LEN / sizeof(u_int16_t); i++)
366 ((u_int16_t *)eaddr)[i] = epic_read_eeprom(sc,i);
367
368 /* Set Non-Volatile Control Register from EEPROM. */
369 CSR_WRITE_4(sc, NVCTL, epic_read_eeprom(sc, EEPROM_NVCTL) & 0x1F);
370
371 /* Set defaults. */
372 sc->tx_threshold = TRANSMIT_THRESHOLD;
373 sc->txcon = TXCON_DEFAULT;
374 sc->miicfg = MIICFG_SMI_ENABLE;
375 sc->phyid = EPIC_UNKN_PHY;
376 sc->serinst = -1;
377
378 /* Fetch card id. */
379 sc->cardvend = pci_read_config(dev, PCIR_SUBVEND_0, 2);
380 sc->cardid = pci_read_config(dev, PCIR_SUBDEV_0, 2);
381
382 if (sc->cardvend != SMC_VENDORID)
383 device_printf(dev, "unknown card vendor %04xh\n", sc->cardvend);
384
385 /* Do ifmedia setup. */
386 error = mii_attach(dev, &sc->miibus, ifp, epic_ifmedia_upd,
387 epic_ifmedia_sts, BMSR_DEFCAPMASK, MII_PHY_ANY, MII_OFFSET_ANY, 0);
388 if (error != 0) {
389 device_printf(dev, "attaching PHYs failed\n");
390 goto fail;
391 }
392
393 /* board type and ... */
394 printf(" type ");
395 for(i = 0x2c; i < 0x32; i++) {
396 tmp = epic_read_eeprom(sc, i);
397 if (' ' == (u_int8_t)tmp)
398 break;
399 printf("%c", (u_int8_t)tmp);
400 tmp >>= 8;
401 if (' ' == (u_int8_t)tmp)
402 break;
403 printf("%c", (u_int8_t)tmp);
404 }
405 printf("\n");
406
407 /* Initialize rings. */
408 if (epic_init_rings(sc)) {
409 device_printf(dev, "failed to init rings\n");
410 error = ENXIO;
411 goto fail;
412 }
413
414 ifp->if_hdrlen = sizeof(struct ether_vlan_header);
415 ifp->if_capabilities |= IFCAP_VLAN_MTU;
416 ifp->if_capenable |= IFCAP_VLAN_MTU;
417 callout_init_mtx(&sc->timer, &sc->lock, 0);
418
419 /* Attach to OS's managers. */
420 ether_ifattach(ifp, eaddr);
421
422 /* Activate our interrupt handler. */
423 error = bus_setup_intr(dev, sc->irq, INTR_TYPE_NET | INTR_MPSAFE,
424 NULL, epic_intr, sc, &sc->sc_ih);
425 if (error) {
426 device_printf(dev, "couldn't set up irq\n");
427 ether_ifdetach(ifp);
428 goto fail;
429 }
430
431 gone_by_fcp101_dev(dev);
432
433 return (0);
434 fail:
435 epic_release(sc);
436 return (error);
437 }
438
439 /*
440 * Free any resources allocated by the driver.
441 */
442 static void
epic_release(epic_softc_t * sc)443 epic_release(epic_softc_t *sc)
444 {
445 if (sc->ifp != NULL)
446 if_free(sc->ifp);
447 if (sc->irq)
448 bus_release_resource(sc->dev, SYS_RES_IRQ, 0, sc->irq);
449 if (sc->res)
450 bus_release_resource(sc->dev, EPIC_RES, EPIC_RID, sc->res);
451 epic_free_rings(sc);
452 if (sc->tx_flist) {
453 bus_dmamap_unload(sc->ftag, sc->fmap);
454 bus_dmamem_free(sc->ftag, sc->tx_flist, sc->fmap);
455 }
456 if (sc->tx_desc) {
457 bus_dmamap_unload(sc->ttag, sc->tmap);
458 bus_dmamem_free(sc->ttag, sc->tx_desc, sc->tmap);
459 }
460 if (sc->rx_desc) {
461 bus_dmamap_unload(sc->rtag, sc->rmap);
462 bus_dmamem_free(sc->rtag, sc->rx_desc, sc->rmap);
463 }
464 if (sc->mtag)
465 bus_dma_tag_destroy(sc->mtag);
466 if (sc->ftag)
467 bus_dma_tag_destroy(sc->ftag);
468 if (sc->ttag)
469 bus_dma_tag_destroy(sc->ttag);
470 if (sc->rtag)
471 bus_dma_tag_destroy(sc->rtag);
472 mtx_destroy(&sc->lock);
473 }
474
475 /*
476 * Detach driver and free resources.
477 */
478 static int
epic_detach(device_t dev)479 epic_detach(device_t dev)
480 {
481 struct ifnet *ifp;
482 epic_softc_t *sc;
483
484 sc = device_get_softc(dev);
485 ifp = sc->ifp;
486
487 EPIC_LOCK(sc);
488 epic_stop(sc);
489 EPIC_UNLOCK(sc);
490 callout_drain(&sc->timer);
491 ether_ifdetach(ifp);
492 bus_teardown_intr(dev, sc->irq, sc->sc_ih);
493
494 bus_generic_detach(dev);
495 device_delete_child(dev, sc->miibus);
496
497 epic_release(sc);
498 return (0);
499 }
500
501 #undef EPIC_RES
502 #undef EPIC_RID
503
504 /*
505 * Stop all chip I/O so that the kernel's probe routines don't
506 * get confused by errant DMAs when rebooting.
507 */
508 static int
epic_shutdown(device_t dev)509 epic_shutdown(device_t dev)
510 {
511 epic_softc_t *sc;
512
513 sc = device_get_softc(dev);
514
515 EPIC_LOCK(sc);
516 epic_stop(sc);
517 EPIC_UNLOCK(sc);
518 return (0);
519 }
520
521 /*
522 * This is if_ioctl handler.
523 */
524 static int
epic_ifioctl(struct ifnet * ifp,u_long command,caddr_t data)525 epic_ifioctl(struct ifnet *ifp, u_long command, caddr_t data)
526 {
527 epic_softc_t *sc = ifp->if_softc;
528 struct mii_data *mii;
529 struct ifreq *ifr = (struct ifreq *) data;
530 int error = 0;
531
532 switch (command) {
533 case SIOCSIFMTU:
534 if (ifp->if_mtu == ifr->ifr_mtu)
535 break;
536
537 /* XXX Though the datasheet doesn't imply any
538 * limitations on RX and TX sizes beside max 64Kb
539 * DMA transfer, seems we can't send more then 1600
540 * data bytes per ethernet packet (transmitter hangs
541 * up if more data is sent).
542 */
543 EPIC_LOCK(sc);
544 if (ifr->ifr_mtu + ifp->if_hdrlen <= EPIC_MAX_MTU) {
545 ifp->if_mtu = ifr->ifr_mtu;
546 epic_stop(sc);
547 epic_init_locked(sc);
548 } else
549 error = EINVAL;
550 EPIC_UNLOCK(sc);
551 break;
552
553 case SIOCSIFFLAGS:
554 /*
555 * If the interface is marked up and stopped, then start it.
556 * If it is marked down and running, then stop it.
557 */
558 EPIC_LOCK(sc);
559 if (ifp->if_flags & IFF_UP) {
560 if ((ifp->if_drv_flags & IFF_DRV_RUNNING) == 0) {
561 epic_init_locked(sc);
562 EPIC_UNLOCK(sc);
563 break;
564 }
565 } else {
566 if (ifp->if_drv_flags & IFF_DRV_RUNNING) {
567 epic_stop(sc);
568 EPIC_UNLOCK(sc);
569 break;
570 }
571 }
572
573 /* Handle IFF_PROMISC and IFF_ALLMULTI flags. */
574 epic_stop_activity(sc);
575 epic_set_mc_table(sc);
576 epic_set_rx_mode(sc);
577 epic_start_activity(sc);
578 EPIC_UNLOCK(sc);
579 break;
580
581 case SIOCADDMULTI:
582 case SIOCDELMULTI:
583 EPIC_LOCK(sc);
584 epic_set_mc_table(sc);
585 EPIC_UNLOCK(sc);
586 error = 0;
587 break;
588
589 case SIOCSIFMEDIA:
590 case SIOCGIFMEDIA:
591 mii = device_get_softc(sc->miibus);
592 error = ifmedia_ioctl(ifp, ifr, &mii->mii_media, command);
593 break;
594
595 default:
596 error = ether_ioctl(ifp, command, data);
597 break;
598 }
599 return (error);
600 }
601
602 static void
epic_dma_map_txbuf(void * arg,bus_dma_segment_t * segs,int nseg,bus_size_t mapsize,int error)603 epic_dma_map_txbuf(void *arg, bus_dma_segment_t *segs, int nseg,
604 bus_size_t mapsize, int error)
605 {
606 struct epic_frag_list *flist;
607 int i;
608
609 if (error)
610 return;
611
612 KASSERT(nseg <= EPIC_MAX_FRAGS, ("too many DMA segments"));
613 flist = arg;
614 /* Fill fragments list. */
615 for (i = 0; i < nseg; i++) {
616 KASSERT(segs[i].ds_len <= MCLBYTES, ("segment size too large"));
617 flist->frag[i].fraglen = segs[i].ds_len;
618 flist->frag[i].fragaddr = segs[i].ds_addr;
619 }
620 flist->numfrags = nseg;
621 }
622
623 static void
epic_dma_map_rxbuf(void * arg,bus_dma_segment_t * segs,int nseg,bus_size_t mapsize,int error)624 epic_dma_map_rxbuf(void *arg, bus_dma_segment_t *segs, int nseg,
625 bus_size_t mapsize, int error)
626 {
627 struct epic_rx_desc *desc;
628
629 if (error)
630 return;
631
632 KASSERT(nseg == 1, ("too many DMA segments"));
633 desc = arg;
634 desc->bufaddr = segs->ds_addr;
635 }
636
637 /*
638 * This is if_start handler. It takes mbufs from if_snd queue
639 * and queue them for transmit, one by one, until TX ring become full
640 * or queue become empty.
641 */
642 static void
epic_ifstart(struct ifnet * ifp)643 epic_ifstart(struct ifnet * ifp)
644 {
645 epic_softc_t *sc = ifp->if_softc;
646
647 EPIC_LOCK(sc);
648 epic_ifstart_locked(ifp);
649 EPIC_UNLOCK(sc);
650 }
651
652 static void
epic_ifstart_locked(struct ifnet * ifp)653 epic_ifstart_locked(struct ifnet * ifp)
654 {
655 epic_softc_t *sc = ifp->if_softc;
656 struct epic_tx_buffer *buf;
657 struct epic_tx_desc *desc;
658 struct epic_frag_list *flist;
659 struct mbuf *m0, *m;
660 int error;
661
662 while (sc->pending_txs < TX_RING_SIZE) {
663 buf = sc->tx_buffer + sc->cur_tx;
664 desc = sc->tx_desc + sc->cur_tx;
665 flist = sc->tx_flist + sc->cur_tx;
666
667 /* Get next packet to send. */
668 IF_DEQUEUE(&ifp->if_snd, m0);
669
670 /* If nothing to send, return. */
671 if (m0 == NULL)
672 return;
673
674 error = bus_dmamap_load_mbuf(sc->mtag, buf->map, m0,
675 epic_dma_map_txbuf, flist, 0);
676
677 if (error && error != EFBIG) {
678 m_freem(m0);
679 if_inc_counter(ifp, IFCOUNTER_OERRORS, 1);
680 continue;
681 }
682
683 /*
684 * If packet was more than EPIC_MAX_FRAGS parts,
685 * recopy packet to a newly allocated mbuf cluster.
686 */
687 if (error) {
688 m = m_defrag(m0, M_NOWAIT);
689 if (m == NULL) {
690 m_freem(m0);
691 if_inc_counter(ifp, IFCOUNTER_OERRORS, 1);
692 continue;
693 }
694 m_freem(m0);
695 m0 = m;
696
697 error = bus_dmamap_load_mbuf(sc->mtag, buf->map, m,
698 epic_dma_map_txbuf, flist, 0);
699 if (error) {
700 m_freem(m);
701 if_inc_counter(ifp, IFCOUNTER_OERRORS, 1);
702 continue;
703 }
704 }
705 bus_dmamap_sync(sc->mtag, buf->map, BUS_DMASYNC_PREWRITE);
706
707 buf->mbuf = m0;
708 sc->pending_txs++;
709 sc->cur_tx = (sc->cur_tx + 1) & TX_RING_MASK;
710 desc->control = 0x01;
711 desc->txlength =
712 max(m0->m_pkthdr.len, ETHER_MIN_LEN - ETHER_CRC_LEN);
713 desc->status = 0x8000;
714 bus_dmamap_sync(sc->ttag, sc->tmap,
715 BUS_DMASYNC_PREREAD | BUS_DMASYNC_PREWRITE);
716 bus_dmamap_sync(sc->ftag, sc->fmap, BUS_DMASYNC_PREWRITE);
717 CSR_WRITE_4(sc, COMMAND, COMMAND_TXQUEUED);
718
719 /* Set watchdog timer. */
720 sc->tx_timeout = 8;
721
722 BPF_MTAP(ifp, m0);
723 }
724
725 ifp->if_drv_flags |= IFF_DRV_OACTIVE;
726 }
727
728 /*
729 * Synopsis: Finish all received frames.
730 */
731 static void
epic_rx_done(epic_softc_t * sc)732 epic_rx_done(epic_softc_t *sc)
733 {
734 struct ifnet *ifp = sc->ifp;
735 u_int16_t len;
736 struct epic_rx_buffer *buf;
737 struct epic_rx_desc *desc;
738 struct mbuf *m;
739 bus_dmamap_t map;
740 int error;
741
742 bus_dmamap_sync(sc->rtag, sc->rmap, BUS_DMASYNC_POSTREAD);
743 while ((sc->rx_desc[sc->cur_rx].status & 0x8000) == 0) {
744 buf = sc->rx_buffer + sc->cur_rx;
745 desc = sc->rx_desc + sc->cur_rx;
746
747 /* Switch to next descriptor. */
748 sc->cur_rx = (sc->cur_rx + 1) & RX_RING_MASK;
749
750 /*
751 * Check for RX errors. This should only happen if
752 * SAVE_ERRORED_PACKETS is set. RX errors generate
753 * RXE interrupt usually.
754 */
755 if ((desc->status & 1) == 0) {
756 if_inc_counter(ifp, IFCOUNTER_IERRORS, 1);
757 desc->status = 0x8000;
758 continue;
759 }
760
761 /* Save packet length and mbuf contained packet. */
762 bus_dmamap_sync(sc->mtag, buf->map, BUS_DMASYNC_POSTREAD);
763 len = desc->rxlength - ETHER_CRC_LEN;
764 m = buf->mbuf;
765
766 /* Try to get an mbuf cluster. */
767 buf->mbuf = m_getcl(M_NOWAIT, MT_DATA, M_PKTHDR);
768 if (buf->mbuf == NULL) {
769 buf->mbuf = m;
770 desc->status = 0x8000;
771 if_inc_counter(ifp, IFCOUNTER_IERRORS, 1);
772 continue;
773 }
774 buf->mbuf->m_len = buf->mbuf->m_pkthdr.len = MCLBYTES;
775 m_adj(buf->mbuf, ETHER_ALIGN);
776
777 /* Point to new mbuf, and give descriptor to chip. */
778 error = bus_dmamap_load_mbuf(sc->mtag, sc->sparemap, buf->mbuf,
779 epic_dma_map_rxbuf, desc, 0);
780 if (error) {
781 buf->mbuf = m;
782 desc->status = 0x8000;
783 if_inc_counter(ifp, IFCOUNTER_IERRORS, 1);
784 continue;
785 }
786
787 desc->status = 0x8000;
788 bus_dmamap_unload(sc->mtag, buf->map);
789 map = buf->map;
790 buf->map = sc->sparemap;
791 sc->sparemap = map;
792 bus_dmamap_sync(sc->mtag, buf->map, BUS_DMASYNC_PREREAD);
793
794 /* First mbuf in packet holds the ethernet and packet headers */
795 m->m_pkthdr.rcvif = ifp;
796 m->m_pkthdr.len = m->m_len = len;
797
798 /* Give mbuf to OS. */
799 EPIC_UNLOCK(sc);
800 (*ifp->if_input)(ifp, m);
801 EPIC_LOCK(sc);
802
803 /* Successfully received frame */
804 if_inc_counter(ifp, IFCOUNTER_IPACKETS, 1);
805 }
806 bus_dmamap_sync(sc->rtag, sc->rmap,
807 BUS_DMASYNC_PREREAD | BUS_DMASYNC_PREWRITE);
808 }
809
810 /*
811 * Synopsis: Do last phase of transmission. I.e. if desc is
812 * transmitted, decrease pending_txs counter, free mbuf contained
813 * packet, switch to next descriptor and repeat until no packets
814 * are pending or descriptor is not transmitted yet.
815 */
816 static void
epic_tx_done(epic_softc_t * sc)817 epic_tx_done(epic_softc_t *sc)
818 {
819 struct epic_tx_buffer *buf;
820 struct epic_tx_desc *desc;
821 u_int16_t status;
822
823 bus_dmamap_sync(sc->ttag, sc->tmap, BUS_DMASYNC_POSTREAD);
824 while (sc->pending_txs > 0) {
825 buf = sc->tx_buffer + sc->dirty_tx;
826 desc = sc->tx_desc + sc->dirty_tx;
827 status = desc->status;
828
829 /*
830 * If packet is not transmitted, thou followed
831 * packets are not transmitted too.
832 */
833 if (status & 0x8000)
834 break;
835
836 /* Packet is transmitted. Switch to next and free mbuf. */
837 sc->pending_txs--;
838 sc->dirty_tx = (sc->dirty_tx + 1) & TX_RING_MASK;
839 bus_dmamap_sync(sc->mtag, buf->map, BUS_DMASYNC_POSTWRITE);
840 bus_dmamap_unload(sc->mtag, buf->map);
841 m_freem(buf->mbuf);
842 buf->mbuf = NULL;
843
844 /* Check for errors and collisions. */
845 if (status & 0x0001)
846 if_inc_counter(sc->ifp, IFCOUNTER_OPACKETS, 1);
847 else
848 if_inc_counter(sc->ifp, IFCOUNTER_OERRORS, 1);
849 if_inc_counter(sc->ifp, IFCOUNTER_COLLISIONS, (status >> 8) & 0x1F);
850 #ifdef EPIC_DIAG
851 if ((status & 0x1001) == 0x1001)
852 device_printf(sc->dev,
853 "Tx ERROR: excessive coll. number\n");
854 #endif
855 }
856
857 if (sc->pending_txs < TX_RING_SIZE)
858 sc->ifp->if_drv_flags &= ~IFF_DRV_OACTIVE;
859 bus_dmamap_sync(sc->ttag, sc->tmap,
860 BUS_DMASYNC_PREREAD | BUS_DMASYNC_PREWRITE);
861 }
862
863 /*
864 * Interrupt function
865 */
866 static void
epic_intr(void * arg)867 epic_intr(void *arg)
868 {
869 epic_softc_t *sc;
870 int status, i;
871
872 sc = arg;
873 i = 4;
874 EPIC_LOCK(sc);
875 while (i-- && ((status = CSR_READ_4(sc, INTSTAT)) & INTSTAT_INT_ACTV)) {
876 CSR_WRITE_4(sc, INTSTAT, status);
877
878 if (status & (INTSTAT_RQE|INTSTAT_RCC|INTSTAT_OVW)) {
879 epic_rx_done(sc);
880 if (status & (INTSTAT_RQE|INTSTAT_OVW)) {
881 #ifdef EPIC_DIAG
882 if (status & INTSTAT_OVW)
883 device_printf(sc->dev, "RX buffer overflow\n");
884 if (status & INTSTAT_RQE)
885 device_printf(sc->dev, "RX FIFO overflow\n");
886 #endif
887 if ((CSR_READ_4(sc, COMMAND) & COMMAND_RXQUEUED) == 0)
888 CSR_WRITE_4(sc, COMMAND, COMMAND_RXQUEUED);
889 if_inc_counter(sc->ifp, IFCOUNTER_IERRORS, 1);
890 }
891 }
892
893 if (status & (INTSTAT_TXC|INTSTAT_TCC|INTSTAT_TQE)) {
894 epic_tx_done(sc);
895 if (sc->ifp->if_snd.ifq_head != NULL)
896 epic_ifstart_locked(sc->ifp);
897 }
898
899 /* Check for rare errors */
900 if (status & (INTSTAT_FATAL|INTSTAT_PMA|INTSTAT_PTA|
901 INTSTAT_APE|INTSTAT_DPE|INTSTAT_TXU|INTSTAT_RXE)) {
902 if (status & (INTSTAT_FATAL|INTSTAT_PMA|INTSTAT_PTA|
903 INTSTAT_APE|INTSTAT_DPE)) {
904 device_printf(sc->dev, "PCI fatal errors occurred: %s%s%s%s\n",
905 (status & INTSTAT_PMA) ? "PMA " : "",
906 (status & INTSTAT_PTA) ? "PTA " : "",
907 (status & INTSTAT_APE) ? "APE " : "",
908 (status & INTSTAT_DPE) ? "DPE" : "");
909
910 epic_stop(sc);
911 epic_init_locked(sc);
912 break;
913 }
914
915 if (status & INTSTAT_RXE) {
916 #ifdef EPIC_DIAG
917 device_printf(sc->dev, "CRC/Alignment error\n");
918 #endif
919 if_inc_counter(sc->ifp, IFCOUNTER_IERRORS, 1);
920 }
921
922 if (status & INTSTAT_TXU) {
923 epic_tx_underrun(sc);
924 if_inc_counter(sc->ifp, IFCOUNTER_OERRORS, 1);
925 }
926 }
927 }
928
929 /* If no packets are pending, then no timeouts. */
930 if (sc->pending_txs == 0)
931 sc->tx_timeout = 0;
932 EPIC_UNLOCK(sc);
933 }
934
935 /*
936 * Handle the TX underrun error: increase the TX threshold
937 * and restart the transmitter.
938 */
939 static void
epic_tx_underrun(epic_softc_t * sc)940 epic_tx_underrun(epic_softc_t *sc)
941 {
942 if (sc->tx_threshold > TRANSMIT_THRESHOLD_MAX) {
943 sc->txcon &= ~TXCON_EARLY_TRANSMIT_ENABLE;
944 #ifdef EPIC_DIAG
945 device_printf(sc->dev, "Tx UNDERRUN: early TX disabled\n");
946 #endif
947 } else {
948 sc->tx_threshold += 0x40;
949 #ifdef EPIC_DIAG
950 device_printf(sc->dev,
951 "Tx UNDERRUN: TX threshold increased to %d\n",
952 sc->tx_threshold);
953 #endif
954 }
955
956 /* We must set TXUGO to reset the stuck transmitter. */
957 CSR_WRITE_4(sc, COMMAND, COMMAND_TXUGO);
958
959 /* Update the TX threshold */
960 epic_stop_activity(sc);
961 epic_set_tx_mode(sc);
962 epic_start_activity(sc);
963 }
964
965 /*
966 * This function is called once a second when the interface is running
967 * and performs two functions. First, it provides a timer for the mii
968 * to help with autonegotiation. Second, it checks for transmit
969 * timeouts.
970 */
971 static void
epic_timer(void * arg)972 epic_timer(void *arg)
973 {
974 epic_softc_t *sc = arg;
975 struct mii_data *mii;
976 struct ifnet *ifp;
977
978 ifp = sc->ifp;
979 EPIC_ASSERT_LOCKED(sc);
980 if (sc->tx_timeout && --sc->tx_timeout == 0) {
981 device_printf(sc->dev, "device timeout %d packets\n",
982 sc->pending_txs);
983
984 /* Try to finish queued packets. */
985 epic_tx_done(sc);
986
987 /* If not successful. */
988 if (sc->pending_txs > 0) {
989 if_inc_counter(ifp, IFCOUNTER_OERRORS, sc->pending_txs);
990
991 /* Reinitialize board. */
992 device_printf(sc->dev, "reinitialization\n");
993 epic_stop(sc);
994 epic_init_locked(sc);
995 } else
996 device_printf(sc->dev,
997 "seems we can continue normaly\n");
998
999 /* Start output. */
1000 if (ifp->if_snd.ifq_head)
1001 epic_ifstart_locked(ifp);
1002 }
1003
1004 mii = device_get_softc(sc->miibus);
1005 mii_tick(mii);
1006
1007 callout_reset(&sc->timer, hz, epic_timer, sc);
1008 }
1009
1010 /*
1011 * Set media options.
1012 */
1013 static int
epic_ifmedia_upd(struct ifnet * ifp)1014 epic_ifmedia_upd(struct ifnet *ifp)
1015 {
1016 epic_softc_t *sc;
1017 int error;
1018
1019 sc = ifp->if_softc;
1020 EPIC_LOCK(sc);
1021 error = epic_ifmedia_upd_locked(ifp);
1022 EPIC_UNLOCK(sc);
1023 return (error);
1024 }
1025
1026 static int
epic_ifmedia_upd_locked(struct ifnet * ifp)1027 epic_ifmedia_upd_locked(struct ifnet *ifp)
1028 {
1029 epic_softc_t *sc;
1030 struct mii_data *mii;
1031 struct ifmedia *ifm;
1032 struct mii_softc *miisc;
1033 int cfg, media;
1034
1035 sc = ifp->if_softc;
1036 mii = device_get_softc(sc->miibus);
1037 ifm = &mii->mii_media;
1038 media = ifm->ifm_cur->ifm_media;
1039
1040 /* Do not do anything if interface is not up. */
1041 if ((ifp->if_flags & IFF_UP) == 0)
1042 return (0);
1043
1044 /*
1045 * Lookup current selected PHY.
1046 */
1047 if (IFM_INST(media) == sc->serinst) {
1048 sc->phyid = EPIC_SERIAL;
1049 sc->physc = NULL;
1050 } else {
1051 /* If we're not selecting serial interface, select MII mode. */
1052 sc->miicfg &= ~MIICFG_SERIAL_ENABLE;
1053 CSR_WRITE_4(sc, MIICFG, sc->miicfg);
1054
1055 /* Default to unknown PHY. */
1056 sc->phyid = EPIC_UNKN_PHY;
1057
1058 /* Lookup selected PHY. */
1059 LIST_FOREACH(miisc, &mii->mii_phys, mii_list) {
1060 if (IFM_INST(media) == miisc->mii_inst) {
1061 sc->physc = miisc;
1062 break;
1063 }
1064 }
1065
1066 /* Identify selected PHY. */
1067 if (sc->physc) {
1068 int id1, id2, model, oui;
1069
1070 id1 = PHY_READ(sc->physc, MII_PHYIDR1);
1071 id2 = PHY_READ(sc->physc, MII_PHYIDR2);
1072
1073 oui = MII_OUI(id1, id2);
1074 model = MII_MODEL(id2);
1075 switch (oui) {
1076 case MII_OUI_xxQUALSEMI:
1077 if (model == MII_MODEL_xxQUALSEMI_QS6612)
1078 sc->phyid = EPIC_QS6612_PHY;
1079 break;
1080 case MII_OUI_ALTIMA:
1081 if (model == MII_MODEL_ALTIMA_AC101)
1082 sc->phyid = EPIC_AC101_PHY;
1083 break;
1084 case MII_OUI_xxLEVEL1:
1085 if (model == MII_MODEL_xxLEVEL1_LXT970)
1086 sc->phyid = EPIC_LXT970_PHY;
1087 break;
1088 }
1089 }
1090 }
1091
1092 /*
1093 * Do PHY specific card setup.
1094 */
1095
1096 /*
1097 * Call this, to isolate all not selected PHYs and
1098 * set up selected.
1099 */
1100 mii_mediachg(mii);
1101
1102 /* Do our own setup. */
1103 switch (sc->phyid) {
1104 case EPIC_QS6612_PHY:
1105 break;
1106 case EPIC_AC101_PHY:
1107 /* We have to powerup fiber tranceivers. */
1108 if (IFM_SUBTYPE(media) == IFM_100_FX)
1109 sc->miicfg |= MIICFG_694_ENABLE;
1110 else
1111 sc->miicfg &= ~MIICFG_694_ENABLE;
1112 CSR_WRITE_4(sc, MIICFG, sc->miicfg);
1113
1114 break;
1115 case EPIC_LXT970_PHY:
1116 /* We have to powerup fiber tranceivers. */
1117 cfg = PHY_READ(sc->physc, MII_LXTPHY_CONFIG);
1118 if (IFM_SUBTYPE(media) == IFM_100_FX)
1119 cfg |= CONFIG_LEDC1 | CONFIG_LEDC0;
1120 else
1121 cfg &= ~(CONFIG_LEDC1 | CONFIG_LEDC0);
1122 PHY_WRITE(sc->physc, MII_LXTPHY_CONFIG, cfg);
1123
1124 break;
1125 case EPIC_SERIAL:
1126 /* Select serial PHY (10base2/BNC usually). */
1127 sc->miicfg |= MIICFG_694_ENABLE | MIICFG_SERIAL_ENABLE;
1128 CSR_WRITE_4(sc, MIICFG, sc->miicfg);
1129
1130 /* There is no driver to fill this. */
1131 mii->mii_media_active = media;
1132 mii->mii_media_status = 0;
1133
1134 /*
1135 * We need to call this manually as it wasn't called
1136 * in mii_mediachg().
1137 */
1138 epic_miibus_statchg(sc->dev);
1139 break;
1140 default:
1141 device_printf(sc->dev, "ERROR! Unknown PHY selected\n");
1142 return (EINVAL);
1143 }
1144
1145 return (0);
1146 }
1147
1148 /*
1149 * Report current media status.
1150 */
1151 static void
epic_ifmedia_sts(struct ifnet * ifp,struct ifmediareq * ifmr)1152 epic_ifmedia_sts(struct ifnet *ifp, struct ifmediareq *ifmr)
1153 {
1154 epic_softc_t *sc;
1155 struct mii_data *mii;
1156
1157 sc = ifp->if_softc;
1158 mii = device_get_softc(sc->miibus);
1159 EPIC_LOCK(sc);
1160
1161 /* Nothing should be selected if interface is down. */
1162 if ((ifp->if_flags & IFF_UP) == 0) {
1163 ifmr->ifm_active = IFM_NONE;
1164 ifmr->ifm_status = 0;
1165 EPIC_UNLOCK(sc);
1166 return;
1167 }
1168
1169 /* Call underlying pollstat, if not serial PHY. */
1170 if (sc->phyid != EPIC_SERIAL)
1171 mii_pollstat(mii);
1172
1173 /* Simply copy media info. */
1174 ifmr->ifm_active = mii->mii_media_active;
1175 ifmr->ifm_status = mii->mii_media_status;
1176 EPIC_UNLOCK(sc);
1177 }
1178
1179 /*
1180 * Callback routine, called on media change.
1181 */
1182 static void
epic_miibus_statchg(device_t dev)1183 epic_miibus_statchg(device_t dev)
1184 {
1185 epic_softc_t *sc;
1186 struct mii_data *mii;
1187 int media;
1188
1189 sc = device_get_softc(dev);
1190 mii = device_get_softc(sc->miibus);
1191 media = mii->mii_media_active;
1192
1193 sc->txcon &= ~(TXCON_LOOPBACK_MODE | TXCON_FULL_DUPLEX);
1194
1195 /*
1196 * If we are in full-duplex mode or loopback operation,
1197 * we need to decouple receiver and transmitter.
1198 */
1199 if (IFM_OPTIONS(media) & (IFM_FDX | IFM_LOOP))
1200 sc->txcon |= TXCON_FULL_DUPLEX;
1201
1202 /* On some cards we need manualy set fullduplex led. */
1203 if (sc->cardid == SMC9432FTX ||
1204 sc->cardid == SMC9432FTX_SC) {
1205 if (IFM_OPTIONS(media) & IFM_FDX)
1206 sc->miicfg |= MIICFG_694_ENABLE;
1207 else
1208 sc->miicfg &= ~MIICFG_694_ENABLE;
1209
1210 CSR_WRITE_4(sc, MIICFG, sc->miicfg);
1211 }
1212
1213 epic_stop_activity(sc);
1214 epic_set_tx_mode(sc);
1215 epic_start_activity(sc);
1216 }
1217
1218 static void
epic_miibus_mediainit(device_t dev)1219 epic_miibus_mediainit(device_t dev)
1220 {
1221 epic_softc_t *sc;
1222 struct mii_data *mii;
1223 struct ifmedia *ifm;
1224 int media;
1225
1226 sc = device_get_softc(dev);
1227 mii = device_get_softc(sc->miibus);
1228 ifm = &mii->mii_media;
1229
1230 /*
1231 * Add Serial Media Interface if present, this applies to
1232 * SMC9432BTX serie.
1233 */
1234 if (CSR_READ_4(sc, MIICFG) & MIICFG_PHY_PRESENT) {
1235 /* Store its instance. */
1236 sc->serinst = mii->mii_instance++;
1237
1238 /* Add as 10base2/BNC media. */
1239 media = IFM_MAKEWORD(IFM_ETHER, IFM_10_2, 0, sc->serinst);
1240 ifmedia_add(ifm, media, 0, NULL);
1241
1242 /* Report to user. */
1243 device_printf(sc->dev, "serial PHY detected (10Base2/BNC)\n");
1244 }
1245 }
1246
1247 /*
1248 * Reset chip and update media.
1249 */
1250 static void
epic_init(void * xsc)1251 epic_init(void *xsc)
1252 {
1253 epic_softc_t *sc = xsc;
1254
1255 EPIC_LOCK(sc);
1256 epic_init_locked(sc);
1257 EPIC_UNLOCK(sc);
1258 }
1259
1260 static void
epic_init_locked(epic_softc_t * sc)1261 epic_init_locked(epic_softc_t *sc)
1262 {
1263 struct ifnet *ifp = sc->ifp;
1264 int i;
1265
1266 /* If interface is already running, then we need not do anything. */
1267 if (ifp->if_drv_flags & IFF_DRV_RUNNING) {
1268 return;
1269 }
1270
1271 /* Soft reset the chip (we have to power up card before). */
1272 CSR_WRITE_4(sc, GENCTL, 0);
1273 CSR_WRITE_4(sc, GENCTL, GENCTL_SOFT_RESET);
1274
1275 /*
1276 * Reset takes 15 pci ticks which depends on PCI bus speed.
1277 * Assuming it >= 33000000 hz, we have wait at least 495e-6 sec.
1278 */
1279 DELAY(500);
1280
1281 /* Wake up */
1282 CSR_WRITE_4(sc, GENCTL, 0);
1283
1284 /* Workaround for Application Note 7-15 */
1285 for (i = 0; i < 16; i++)
1286 CSR_WRITE_4(sc, TEST1, TEST1_CLOCK_TEST);
1287
1288 /* Give rings to EPIC */
1289 CSR_WRITE_4(sc, PRCDAR, sc->rx_addr);
1290 CSR_WRITE_4(sc, PTCDAR, sc->tx_addr);
1291
1292 /* Put node address to EPIC. */
1293 CSR_WRITE_4(sc, LAN0, ((u_int16_t *)IF_LLADDR(sc->ifp))[0]);
1294 CSR_WRITE_4(sc, LAN1, ((u_int16_t *)IF_LLADDR(sc->ifp))[1]);
1295 CSR_WRITE_4(sc, LAN2, ((u_int16_t *)IF_LLADDR(sc->ifp))[2]);
1296
1297 /* Set tx mode, includeing transmit threshold. */
1298 epic_set_tx_mode(sc);
1299
1300 /* Compute and set RXCON. */
1301 epic_set_rx_mode(sc);
1302
1303 /* Set multicast table. */
1304 epic_set_mc_table(sc);
1305
1306 /* Enable interrupts by setting the interrupt mask. */
1307 CSR_WRITE_4(sc, INTMASK,
1308 INTSTAT_RCC | /* INTSTAT_RQE | INTSTAT_OVW | INTSTAT_RXE | */
1309 /* INTSTAT_TXC | */ INTSTAT_TCC | INTSTAT_TQE | INTSTAT_TXU |
1310 INTSTAT_FATAL);
1311
1312 /* Acknowledge all pending interrupts. */
1313 CSR_WRITE_4(sc, INTSTAT, CSR_READ_4(sc, INTSTAT));
1314
1315 /* Enable interrupts, set for PCI read multiple and etc */
1316 CSR_WRITE_4(sc, GENCTL,
1317 GENCTL_ENABLE_INTERRUPT | GENCTL_MEMORY_READ_MULTIPLE |
1318 GENCTL_ONECOPY | GENCTL_RECEIVE_FIFO_THRESHOLD64);
1319
1320 /* Mark interface running ... */
1321 if (ifp->if_flags & IFF_UP)
1322 ifp->if_drv_flags |= IFF_DRV_RUNNING;
1323 else
1324 ifp->if_drv_flags &= ~IFF_DRV_RUNNING;
1325
1326 /* ... and free */
1327 ifp->if_drv_flags &= ~IFF_DRV_OACTIVE;
1328
1329 /* Start Rx process */
1330 epic_start_activity(sc);
1331
1332 /* Set appropriate media */
1333 epic_ifmedia_upd_locked(ifp);
1334
1335 callout_reset(&sc->timer, hz, epic_timer, sc);
1336 }
1337
1338 /*
1339 * Synopsis: calculate and set Rx mode. Chip must be in idle state to
1340 * access RXCON.
1341 */
1342 static void
epic_set_rx_mode(epic_softc_t * sc)1343 epic_set_rx_mode(epic_softc_t *sc)
1344 {
1345 u_int32_t flags;
1346 u_int32_t rxcon;
1347
1348 flags = sc->ifp->if_flags;
1349 rxcon = RXCON_DEFAULT;
1350
1351 #ifdef EPIC_EARLY_RX
1352 rxcon |= RXCON_EARLY_RX;
1353 #endif
1354
1355 rxcon |= (flags & IFF_PROMISC) ? RXCON_PROMISCUOUS_MODE : 0;
1356
1357 CSR_WRITE_4(sc, RXCON, rxcon);
1358 }
1359
1360 /*
1361 * Synopsis: Set transmit control register. Chip must be in idle state to
1362 * access TXCON.
1363 */
1364 static void
epic_set_tx_mode(epic_softc_t * sc)1365 epic_set_tx_mode(epic_softc_t *sc)
1366 {
1367
1368 if (sc->txcon & TXCON_EARLY_TRANSMIT_ENABLE)
1369 CSR_WRITE_4(sc, ETXTHR, sc->tx_threshold);
1370
1371 CSR_WRITE_4(sc, TXCON, sc->txcon);
1372 }
1373
1374 /*
1375 * Synopsis: Program multicast filter honoring IFF_ALLMULTI and IFF_PROMISC
1376 * flags (note that setting PROMISC bit in EPIC's RXCON will only touch
1377 * individual frames, multicast filter must be manually programmed).
1378 *
1379 * Note: EPIC must be in idle state.
1380 */
1381 static void
epic_set_mc_table(epic_softc_t * sc)1382 epic_set_mc_table(epic_softc_t *sc)
1383 {
1384 struct ifnet *ifp;
1385 struct ifmultiaddr *ifma;
1386 u_int16_t filter[4];
1387 u_int8_t h;
1388
1389 ifp = sc->ifp;
1390 if (ifp->if_flags & (IFF_ALLMULTI | IFF_PROMISC)) {
1391 CSR_WRITE_4(sc, MC0, 0xFFFF);
1392 CSR_WRITE_4(sc, MC1, 0xFFFF);
1393 CSR_WRITE_4(sc, MC2, 0xFFFF);
1394 CSR_WRITE_4(sc, MC3, 0xFFFF);
1395 return;
1396 }
1397
1398 filter[0] = 0;
1399 filter[1] = 0;
1400 filter[2] = 0;
1401 filter[3] = 0;
1402
1403 if_maddr_rlock(ifp);
1404 CK_STAILQ_FOREACH(ifma, &ifp->if_multiaddrs, ifma_link) {
1405 if (ifma->ifma_addr->sa_family != AF_LINK)
1406 continue;
1407 h = ether_crc32_be(LLADDR((struct sockaddr_dl *)
1408 ifma->ifma_addr), ETHER_ADDR_LEN) >> 26;
1409 filter[h >> 4] |= 1 << (h & 0xF);
1410 }
1411 if_maddr_runlock(ifp);
1412
1413 CSR_WRITE_4(sc, MC0, filter[0]);
1414 CSR_WRITE_4(sc, MC1, filter[1]);
1415 CSR_WRITE_4(sc, MC2, filter[2]);
1416 CSR_WRITE_4(sc, MC3, filter[3]);
1417 }
1418
1419
1420 /*
1421 * Synopsis: Start receive process and transmit one, if they need.
1422 */
1423 static void
epic_start_activity(epic_softc_t * sc)1424 epic_start_activity(epic_softc_t *sc)
1425 {
1426
1427 /* Start rx process. */
1428 CSR_WRITE_4(sc, COMMAND, COMMAND_RXQUEUED | COMMAND_START_RX |
1429 (sc->pending_txs ? COMMAND_TXQUEUED : 0));
1430 }
1431
1432 /*
1433 * Synopsis: Completely stop Rx and Tx processes. If TQE is set additional
1434 * packet needs to be queued to stop Tx DMA.
1435 */
1436 static void
epic_stop_activity(epic_softc_t * sc)1437 epic_stop_activity(epic_softc_t *sc)
1438 {
1439 int status, i;
1440
1441 /* Stop Tx and Rx DMA. */
1442 CSR_WRITE_4(sc, COMMAND,
1443 COMMAND_STOP_RX | COMMAND_STOP_RDMA | COMMAND_STOP_TDMA);
1444
1445 /* Wait Rx and Tx DMA to stop (why 1 ms ??? XXX). */
1446 for (i = 0; i < 0x1000; i++) {
1447 status = CSR_READ_4(sc, INTSTAT) &
1448 (INTSTAT_TXIDLE | INTSTAT_RXIDLE);
1449 if (status == (INTSTAT_TXIDLE | INTSTAT_RXIDLE))
1450 break;
1451 DELAY(1);
1452 }
1453
1454 /* Catch all finished packets. */
1455 epic_rx_done(sc);
1456 epic_tx_done(sc);
1457
1458 status = CSR_READ_4(sc, INTSTAT);
1459
1460 if ((status & INTSTAT_RXIDLE) == 0)
1461 device_printf(sc->dev, "ERROR! Can't stop Rx DMA\n");
1462
1463 if ((status & INTSTAT_TXIDLE) == 0)
1464 device_printf(sc->dev, "ERROR! Can't stop Tx DMA\n");
1465
1466 /*
1467 * May need to queue one more packet if TQE, this is rare
1468 * but existing case.
1469 */
1470 if ((status & INTSTAT_TQE) && !(status & INTSTAT_TXIDLE))
1471 (void)epic_queue_last_packet(sc);
1472 }
1473
1474 /*
1475 * The EPIC transmitter may stuck in TQE state. It will not go IDLE until
1476 * a packet from current descriptor will be copied to internal RAM. We
1477 * compose a dummy packet here and queue it for transmission.
1478 *
1479 * XXX the packet will then be actually sent over network...
1480 */
1481 static int
epic_queue_last_packet(epic_softc_t * sc)1482 epic_queue_last_packet(epic_softc_t *sc)
1483 {
1484 struct epic_tx_desc *desc;
1485 struct epic_frag_list *flist;
1486 struct epic_tx_buffer *buf;
1487 struct mbuf *m0;
1488 int error, i;
1489
1490 device_printf(sc->dev, "queue last packet\n");
1491
1492 desc = sc->tx_desc + sc->cur_tx;
1493 flist = sc->tx_flist + sc->cur_tx;
1494 buf = sc->tx_buffer + sc->cur_tx;
1495
1496 if ((desc->status & 0x8000) || (buf->mbuf != NULL))
1497 return (EBUSY);
1498
1499 MGETHDR(m0, M_NOWAIT, MT_DATA);
1500 if (m0 == NULL)
1501 return (ENOBUFS);
1502
1503 /* Prepare mbuf. */
1504 m0->m_len = min(MHLEN, ETHER_MIN_LEN - ETHER_CRC_LEN);
1505 m0->m_pkthdr.len = m0->m_len;
1506 m0->m_pkthdr.rcvif = sc->ifp;
1507 bzero(mtod(m0, caddr_t), m0->m_len);
1508
1509 /* Fill fragments list. */
1510 error = bus_dmamap_load_mbuf(sc->mtag, buf->map, m0,
1511 epic_dma_map_txbuf, flist, 0);
1512 if (error) {
1513 m_freem(m0);
1514 return (error);
1515 }
1516 bus_dmamap_sync(sc->mtag, buf->map, BUS_DMASYNC_PREWRITE);
1517
1518 /* Fill in descriptor. */
1519 buf->mbuf = m0;
1520 sc->pending_txs++;
1521 sc->cur_tx = (sc->cur_tx + 1) & TX_RING_MASK;
1522 desc->control = 0x01;
1523 desc->txlength = max(m0->m_pkthdr.len, ETHER_MIN_LEN - ETHER_CRC_LEN);
1524 desc->status = 0x8000;
1525 bus_dmamap_sync(sc->ttag, sc->tmap,
1526 BUS_DMASYNC_PREREAD | BUS_DMASYNC_PREWRITE);
1527 bus_dmamap_sync(sc->ftag, sc->fmap, BUS_DMASYNC_PREWRITE);
1528
1529 /* Launch transmission. */
1530 CSR_WRITE_4(sc, COMMAND, COMMAND_STOP_TDMA | COMMAND_TXQUEUED);
1531
1532 /* Wait Tx DMA to stop (for how long??? XXX) */
1533 for (i = 0; i < 1000; i++) {
1534 if (CSR_READ_4(sc, INTSTAT) & INTSTAT_TXIDLE)
1535 break;
1536 DELAY(1);
1537 }
1538
1539 if ((CSR_READ_4(sc, INTSTAT) & INTSTAT_TXIDLE) == 0)
1540 device_printf(sc->dev, "ERROR! can't stop Tx DMA (2)\n");
1541 else
1542 epic_tx_done(sc);
1543
1544 return (0);
1545 }
1546
1547 /*
1548 * Synopsis: Shut down board and deallocates rings.
1549 */
1550 static void
epic_stop(epic_softc_t * sc)1551 epic_stop(epic_softc_t *sc)
1552 {
1553
1554 EPIC_ASSERT_LOCKED(sc);
1555
1556 sc->tx_timeout = 0;
1557 callout_stop(&sc->timer);
1558
1559 /* Disable interrupts */
1560 CSR_WRITE_4(sc, INTMASK, 0);
1561 CSR_WRITE_4(sc, GENCTL, 0);
1562
1563 /* Try to stop Rx and TX processes */
1564 epic_stop_activity(sc);
1565
1566 /* Reset chip */
1567 CSR_WRITE_4(sc, GENCTL, GENCTL_SOFT_RESET);
1568 DELAY(1000);
1569
1570 /* Make chip go to bed */
1571 CSR_WRITE_4(sc, GENCTL, GENCTL_POWER_DOWN);
1572
1573 /* Mark as stopped */
1574 sc->ifp->if_drv_flags &= ~(IFF_DRV_RUNNING | IFF_DRV_OACTIVE);
1575 }
1576
1577 /*
1578 * Synopsis: This function should free all memory allocated for rings.
1579 */
1580 static void
epic_free_rings(epic_softc_t * sc)1581 epic_free_rings(epic_softc_t *sc)
1582 {
1583 int i;
1584
1585 for (i = 0; i < RX_RING_SIZE; i++) {
1586 struct epic_rx_buffer *buf = sc->rx_buffer + i;
1587 struct epic_rx_desc *desc = sc->rx_desc + i;
1588
1589 desc->status = 0;
1590 desc->buflength = 0;
1591 desc->bufaddr = 0;
1592
1593 if (buf->mbuf) {
1594 bus_dmamap_unload(sc->mtag, buf->map);
1595 bus_dmamap_destroy(sc->mtag, buf->map);
1596 m_freem(buf->mbuf);
1597 }
1598 buf->mbuf = NULL;
1599 }
1600
1601 if (sc->sparemap != NULL)
1602 bus_dmamap_destroy(sc->mtag, sc->sparemap);
1603
1604 for (i = 0; i < TX_RING_SIZE; i++) {
1605 struct epic_tx_buffer *buf = sc->tx_buffer + i;
1606 struct epic_tx_desc *desc = sc->tx_desc + i;
1607
1608 desc->status = 0;
1609 desc->buflength = 0;
1610 desc->bufaddr = 0;
1611
1612 if (buf->mbuf) {
1613 bus_dmamap_unload(sc->mtag, buf->map);
1614 bus_dmamap_destroy(sc->mtag, buf->map);
1615 m_freem(buf->mbuf);
1616 }
1617 buf->mbuf = NULL;
1618 }
1619 }
1620
1621 /*
1622 * Synopsis: Allocates mbufs for Rx ring and point Rx descs to them.
1623 * Point Tx descs to fragment lists. Check that all descs and fraglists
1624 * are bounded and aligned properly.
1625 */
1626 static int
epic_init_rings(epic_softc_t * sc)1627 epic_init_rings(epic_softc_t *sc)
1628 {
1629 int error, i;
1630
1631 sc->cur_rx = sc->cur_tx = sc->dirty_tx = sc->pending_txs = 0;
1632
1633 /* Initialize the RX descriptor ring. */
1634 for (i = 0; i < RX_RING_SIZE; i++) {
1635 struct epic_rx_buffer *buf = sc->rx_buffer + i;
1636 struct epic_rx_desc *desc = sc->rx_desc + i;
1637
1638 desc->status = 0; /* Owned by driver */
1639 desc->next = sc->rx_addr +
1640 ((i + 1) & RX_RING_MASK) * sizeof(struct epic_rx_desc);
1641
1642 if ((desc->next & 3) ||
1643 ((desc->next & PAGE_MASK) + sizeof *desc) > PAGE_SIZE) {
1644 epic_free_rings(sc);
1645 return (EFAULT);
1646 }
1647
1648 buf->mbuf = m_getcl(M_NOWAIT, MT_DATA, M_PKTHDR);
1649 if (buf->mbuf == NULL) {
1650 epic_free_rings(sc);
1651 return (ENOBUFS);
1652 }
1653 buf->mbuf->m_len = buf->mbuf->m_pkthdr.len = MCLBYTES;
1654 m_adj(buf->mbuf, ETHER_ALIGN);
1655
1656 error = bus_dmamap_create(sc->mtag, 0, &buf->map);
1657 if (error) {
1658 epic_free_rings(sc);
1659 return (error);
1660 }
1661 error = bus_dmamap_load_mbuf(sc->mtag, buf->map, buf->mbuf,
1662 epic_dma_map_rxbuf, desc, 0);
1663 if (error) {
1664 epic_free_rings(sc);
1665 return (error);
1666 }
1667 bus_dmamap_sync(sc->mtag, buf->map, BUS_DMASYNC_PREREAD);
1668
1669 desc->buflength = buf->mbuf->m_len; /* Max RX buffer length */
1670 desc->status = 0x8000; /* Set owner bit to NIC */
1671 }
1672 bus_dmamap_sync(sc->rtag, sc->rmap,
1673 BUS_DMASYNC_PREREAD | BUS_DMASYNC_PREWRITE);
1674
1675 /* Create the spare DMA map. */
1676 error = bus_dmamap_create(sc->mtag, 0, &sc->sparemap);
1677 if (error) {
1678 epic_free_rings(sc);
1679 return (error);
1680 }
1681
1682 /* Initialize the TX descriptor ring. */
1683 for (i = 0; i < TX_RING_SIZE; i++) {
1684 struct epic_tx_buffer *buf = sc->tx_buffer + i;
1685 struct epic_tx_desc *desc = sc->tx_desc + i;
1686
1687 desc->status = 0;
1688 desc->next = sc->tx_addr +
1689 ((i + 1) & TX_RING_MASK) * sizeof(struct epic_tx_desc);
1690
1691 if ((desc->next & 3) ||
1692 ((desc->next & PAGE_MASK) + sizeof *desc) > PAGE_SIZE) {
1693 epic_free_rings(sc);
1694 return (EFAULT);
1695 }
1696
1697 buf->mbuf = NULL;
1698 desc->bufaddr = sc->frag_addr +
1699 i * sizeof(struct epic_frag_list);
1700
1701 if ((desc->bufaddr & 3) ||
1702 ((desc->bufaddr & PAGE_MASK) +
1703 sizeof(struct epic_frag_list)) > PAGE_SIZE) {
1704 epic_free_rings(sc);
1705 return (EFAULT);
1706 }
1707
1708 error = bus_dmamap_create(sc->mtag, 0, &buf->map);
1709 if (error) {
1710 epic_free_rings(sc);
1711 return (error);
1712 }
1713 }
1714 bus_dmamap_sync(sc->ttag, sc->tmap,
1715 BUS_DMASYNC_PREREAD | BUS_DMASYNC_PREWRITE);
1716 bus_dmamap_sync(sc->ftag, sc->fmap, BUS_DMASYNC_PREWRITE);
1717
1718 return (0);
1719 }
1720
1721 /*
1722 * EEPROM operation functions
1723 */
1724 static void
epic_write_eepromreg(epic_softc_t * sc,u_int8_t val)1725 epic_write_eepromreg(epic_softc_t *sc, u_int8_t val)
1726 {
1727 u_int16_t i;
1728
1729 CSR_WRITE_1(sc, EECTL, val);
1730
1731 for (i = 0; i < 0xFF; i++) {
1732 if ((CSR_READ_1(sc, EECTL) & 0x20) == 0)
1733 break;
1734 }
1735 }
1736
1737 static u_int8_t
epic_read_eepromreg(epic_softc_t * sc)1738 epic_read_eepromreg(epic_softc_t *sc)
1739 {
1740
1741 return (CSR_READ_1(sc, EECTL));
1742 }
1743
1744 static u_int8_t
epic_eeprom_clock(epic_softc_t * sc,u_int8_t val)1745 epic_eeprom_clock(epic_softc_t *sc, u_int8_t val)
1746 {
1747
1748 epic_write_eepromreg(sc, val);
1749 epic_write_eepromreg(sc, (val | 0x4));
1750 epic_write_eepromreg(sc, val);
1751
1752 return (epic_read_eepromreg(sc));
1753 }
1754
1755 static void
epic_output_eepromw(epic_softc_t * sc,u_int16_t val)1756 epic_output_eepromw(epic_softc_t *sc, u_int16_t val)
1757 {
1758 int i;
1759
1760 for (i = 0xF; i >= 0; i--) {
1761 if (val & (1 << i))
1762 epic_eeprom_clock(sc, 0x0B);
1763 else
1764 epic_eeprom_clock(sc, 0x03);
1765 }
1766 }
1767
1768 static u_int16_t
epic_input_eepromw(epic_softc_t * sc)1769 epic_input_eepromw(epic_softc_t *sc)
1770 {
1771 u_int16_t retval = 0;
1772 int i;
1773
1774 for (i = 0xF; i >= 0; i--) {
1775 if (epic_eeprom_clock(sc, 0x3) & 0x10)
1776 retval |= (1 << i);
1777 }
1778
1779 return (retval);
1780 }
1781
1782 static int
epic_read_eeprom(epic_softc_t * sc,u_int16_t loc)1783 epic_read_eeprom(epic_softc_t *sc, u_int16_t loc)
1784 {
1785 u_int16_t dataval;
1786 u_int16_t read_cmd;
1787
1788 epic_write_eepromreg(sc, 3);
1789
1790 if (epic_read_eepromreg(sc) & 0x40)
1791 read_cmd = (loc & 0x3F) | 0x180;
1792 else
1793 read_cmd = (loc & 0xFF) | 0x600;
1794
1795 epic_output_eepromw(sc, read_cmd);
1796
1797 dataval = epic_input_eepromw(sc);
1798
1799 epic_write_eepromreg(sc, 1);
1800
1801 return (dataval);
1802 }
1803
1804 /*
1805 * Here goes MII read/write routines.
1806 */
1807 static int
epic_read_phy_reg(epic_softc_t * sc,int phy,int reg)1808 epic_read_phy_reg(epic_softc_t *sc, int phy, int reg)
1809 {
1810 int i;
1811
1812 CSR_WRITE_4(sc, MIICTL, ((reg << 4) | (phy << 9) | 0x01));
1813
1814 for (i = 0; i < 0x100; i++) {
1815 if ((CSR_READ_4(sc, MIICTL) & 0x01) == 0)
1816 break;
1817 DELAY(1);
1818 }
1819
1820 return (CSR_READ_4(sc, MIIDATA));
1821 }
1822
1823 static void
epic_write_phy_reg(epic_softc_t * sc,int phy,int reg,int val)1824 epic_write_phy_reg(epic_softc_t *sc, int phy, int reg, int val)
1825 {
1826 int i;
1827
1828 CSR_WRITE_4(sc, MIIDATA, val);
1829 CSR_WRITE_4(sc, MIICTL, ((reg << 4) | (phy << 9) | 0x02));
1830
1831 for(i = 0; i < 0x100; i++) {
1832 if ((CSR_READ_4(sc, MIICTL) & 0x02) == 0)
1833 break;
1834 DELAY(1);
1835 }
1836 }
1837
1838 static int
epic_miibus_readreg(device_t dev,int phy,int reg)1839 epic_miibus_readreg(device_t dev, int phy, int reg)
1840 {
1841 epic_softc_t *sc;
1842
1843 sc = device_get_softc(dev);
1844
1845 return (PHY_READ_2(sc, phy, reg));
1846 }
1847
1848 static int
epic_miibus_writereg(device_t dev,int phy,int reg,int data)1849 epic_miibus_writereg(device_t dev, int phy, int reg, int data)
1850 {
1851 epic_softc_t *sc;
1852
1853 sc = device_get_softc(dev);
1854
1855 PHY_WRITE_2(sc, phy, reg, data);
1856
1857 return (0);
1858 }
1859