FreeBSD/Linux Kernel Cross Reference
sys/pci/if_vr.c
1 /*
2 * Copyright (c) 1997, 1998
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: releng/5.3/sys/pci/if_vr.c 137021 2004-10-28 17:51:33Z bms $");
35
36 /*
37 * VIA Rhine fast ethernet PCI NIC driver
38 *
39 * Supports various network adapters based on the VIA Rhine
40 * and Rhine II PCI controllers, including the D-Link DFE530TX.
41 * Datasheets are available at http://www.via.com.tw.
42 *
43 * Written by Bill Paul <wpaul@ctr.columbia.edu>
44 * Electrical Engineering Department
45 * Columbia University, New York City
46 */
47
48 /*
49 * The VIA Rhine controllers are similar in some respects to the
50 * the DEC tulip chips, except less complicated. The controller
51 * uses an MII bus and an external physical layer interface. The
52 * receiver has a one entry perfect filter and a 64-bit hash table
53 * multicast filter. Transmit and receive descriptors are similar
54 * to the tulip.
55 *
56 * The Rhine has a serious flaw in its transmit DMA mechanism:
57 * transmit buffers must be longword aligned. Unfortunately,
58 * FreeBSD doesn't guarantee that mbufs will be filled in starting
59 * at longword boundaries, so we have to do a buffer copy before
60 * transmission.
61 */
62
63 #include <sys/param.h>
64 #include <sys/systm.h>
65 #include <sys/sockio.h>
66 #include <sys/mbuf.h>
67 #include <sys/malloc.h>
68 #include <sys/kernel.h>
69 #include <sys/module.h>
70 #include <sys/socket.h>
71
72 #include <net/if.h>
73 #include <net/if_arp.h>
74 #include <net/ethernet.h>
75 #include <net/if_dl.h>
76 #include <net/if_media.h>
77
78 #include <net/bpf.h>
79
80 #include <vm/vm.h> /* for vtophys */
81 #include <vm/pmap.h> /* for vtophys */
82 #include <machine/bus_pio.h>
83 #include <machine/bus_memio.h>
84 #include <machine/bus.h>
85 #include <machine/resource.h>
86 #include <sys/bus.h>
87 #include <sys/rman.h>
88
89 #include <dev/mii/mii.h>
90 #include <dev/mii/miivar.h>
91
92 #include <dev/pci/pcireg.h>
93 #include <dev/pci/pcivar.h>
94
95 #define VR_USEIOSPACE
96
97 #include <pci/if_vrreg.h>
98
99 MODULE_DEPEND(vr, pci, 1, 1, 1);
100 MODULE_DEPEND(vr, ether, 1, 1, 1);
101 MODULE_DEPEND(vr, miibus, 1, 1, 1);
102
103 /* "controller miibus0" required. See GENERIC if you get errors here. */
104 #include "miibus_if.h"
105
106 #undef VR_USESWSHIFT
107
108 /*
109 * Various supported device vendors/types and their names.
110 */
111 static struct vr_type vr_devs[] = {
112 { VIA_VENDORID, VIA_DEVICEID_RHINE,
113 "VIA VT3043 Rhine I 10/100BaseTX" },
114 { VIA_VENDORID, VIA_DEVICEID_RHINE_II,
115 "VIA VT86C100A Rhine II 10/100BaseTX" },
116 { VIA_VENDORID, VIA_DEVICEID_RHINE_II_2,
117 "VIA VT6102 Rhine II 10/100BaseTX" },
118 { VIA_VENDORID, VIA_DEVICEID_RHINE_III,
119 "VIA VT6105 Rhine III 10/100BaseTX" },
120 { VIA_VENDORID, VIA_DEVICEID_RHINE_III_M,
121 "VIA VT6105M Rhine III 10/100BaseTX" },
122 { DELTA_VENDORID, DELTA_DEVICEID_RHINE_II,
123 "Delta Electronics Rhine II 10/100BaseTX" },
124 { ADDTRON_VENDORID, ADDTRON_DEVICEID_RHINE_II,
125 "Addtron Technology Rhine II 10/100BaseTX" },
126 { 0, 0, NULL }
127 };
128
129 static int vr_probe (device_t);
130 static int vr_attach (device_t);
131 static int vr_detach (device_t);
132
133 static int vr_newbuf (struct vr_softc *,
134 struct vr_chain_onefrag *,
135 struct mbuf *);
136 static int vr_encap (struct vr_softc *, struct vr_chain *,
137 struct mbuf * );
138
139 static void vr_rxeof (struct vr_softc *);
140 static void vr_rxeoc (struct vr_softc *);
141 static void vr_txeof (struct vr_softc *);
142 static void vr_tick (void *);
143 static void vr_intr (void *);
144 static void vr_start (struct ifnet *);
145 static void vr_start_locked (struct ifnet *);
146 static int vr_ioctl (struct ifnet *, u_long, caddr_t);
147 static void vr_init (void *);
148 static void vr_init_locked (struct vr_softc *);
149 static void vr_stop (struct vr_softc *);
150 static void vr_watchdog (struct ifnet *);
151 static void vr_shutdown (device_t);
152 static int vr_ifmedia_upd (struct ifnet *);
153 static void vr_ifmedia_sts (struct ifnet *, struct ifmediareq *);
154
155 #ifdef VR_USESWSHIFT
156 static void vr_mii_sync (struct vr_softc *);
157 static void vr_mii_send (struct vr_softc *, uint32_t, int);
158 #endif
159 static int vr_mii_readreg (struct vr_softc *, struct vr_mii_frame *);
160 static int vr_mii_writereg (struct vr_softc *, struct vr_mii_frame *);
161 static int vr_miibus_readreg (device_t, uint16_t, uint16_t);
162 static int vr_miibus_writereg (device_t, uint16_t, uint16_t, uint16_t);
163 static void vr_miibus_statchg (device_t);
164
165 static void vr_setcfg (struct vr_softc *, int);
166 static void vr_setmulti (struct vr_softc *);
167 static void vr_reset (struct vr_softc *);
168 static int vr_list_rx_init (struct vr_softc *);
169 static int vr_list_tx_init (struct vr_softc *);
170
171 #ifdef VR_USEIOSPACE
172 #define VR_RES SYS_RES_IOPORT
173 #define VR_RID VR_PCI_LOIO
174 #else
175 #define VR_RES SYS_RES_MEMORY
176 #define VR_RID VR_PCI_LOMEM
177 #endif
178
179 static device_method_t vr_methods[] = {
180 /* Device interface */
181 DEVMETHOD(device_probe, vr_probe),
182 DEVMETHOD(device_attach, vr_attach),
183 DEVMETHOD(device_detach, vr_detach),
184 DEVMETHOD(device_shutdown, vr_shutdown),
185
186 /* bus interface */
187 DEVMETHOD(bus_print_child, bus_generic_print_child),
188 DEVMETHOD(bus_driver_added, bus_generic_driver_added),
189
190 /* MII interface */
191 DEVMETHOD(miibus_readreg, vr_miibus_readreg),
192 DEVMETHOD(miibus_writereg, vr_miibus_writereg),
193 DEVMETHOD(miibus_statchg, vr_miibus_statchg),
194
195 { 0, 0 }
196 };
197
198 static driver_t vr_driver = {
199 "vr",
200 vr_methods,
201 sizeof(struct vr_softc)
202 };
203
204 static devclass_t vr_devclass;
205
206 DRIVER_MODULE(vr, pci, vr_driver, vr_devclass, 0, 0);
207 DRIVER_MODULE(miibus, vr, miibus_driver, miibus_devclass, 0, 0);
208
209 #define VR_SETBIT(sc, reg, x) \
210 CSR_WRITE_1(sc, reg, \
211 CSR_READ_1(sc, reg) | (x))
212
213 #define VR_CLRBIT(sc, reg, x) \
214 CSR_WRITE_1(sc, reg, \
215 CSR_READ_1(sc, reg) & ~(x))
216
217 #define VR_SETBIT16(sc, reg, x) \
218 CSR_WRITE_2(sc, reg, \
219 CSR_READ_2(sc, reg) | (x))
220
221 #define VR_CLRBIT16(sc, reg, x) \
222 CSR_WRITE_2(sc, reg, \
223 CSR_READ_2(sc, reg) & ~(x))
224
225 #define VR_SETBIT32(sc, reg, x) \
226 CSR_WRITE_4(sc, reg, \
227 CSR_READ_4(sc, reg) | (x))
228
229 #define VR_CLRBIT32(sc, reg, x) \
230 CSR_WRITE_4(sc, reg, \
231 CSR_READ_4(sc, reg) & ~(x))
232
233 #define SIO_SET(x) \
234 CSR_WRITE_1(sc, VR_MIICMD, \
235 CSR_READ_1(sc, VR_MIICMD) | (x))
236
237 #define SIO_CLR(x) \
238 CSR_WRITE_1(sc, VR_MIICMD, \
239 CSR_READ_1(sc, VR_MIICMD) & ~(x))
240
241 #ifdef VR_USESWSHIFT
242 /*
243 * Sync the PHYs by setting data bit and strobing the clock 32 times.
244 */
245 static void
246 vr_mii_sync(struct vr_softc *sc)
247 {
248 register int i;
249
250 SIO_SET(VR_MIICMD_DIR|VR_MIICMD_DATAIN);
251
252 for (i = 0; i < 32; i++) {
253 SIO_SET(VR_MIICMD_CLK);
254 DELAY(1);
255 SIO_CLR(VR_MIICMD_CLK);
256 DELAY(1);
257 }
258 }
259
260 /*
261 * Clock a series of bits through the MII.
262 */
263 static void
264 vr_mii_send(struct vr_softc *sc, uint32_t bits, int cnt)
265 {
266 int i;
267
268 SIO_CLR(VR_MIICMD_CLK);
269
270 for (i = (0x1 << (cnt - 1)); i; i >>= 1) {
271 if (bits & i) {
272 SIO_SET(VR_MIICMD_DATAIN);
273 } else {
274 SIO_CLR(VR_MIICMD_DATAIN);
275 }
276 DELAY(1);
277 SIO_CLR(VR_MIICMD_CLK);
278 DELAY(1);
279 SIO_SET(VR_MIICMD_CLK);
280 }
281 }
282 #endif
283
284 /*
285 * Read an PHY register through the MII.
286 */
287 static int
288 vr_mii_readreg(struct vr_softc *sc, struct vr_mii_frame *frame)
289 #ifdef VR_USESWSHIFT
290 {
291 int i, ack;
292
293 /* Set up frame for RX. */
294 frame->mii_stdelim = VR_MII_STARTDELIM;
295 frame->mii_opcode = VR_MII_READOP;
296 frame->mii_turnaround = 0;
297 frame->mii_data = 0;
298
299 CSR_WRITE_1(sc, VR_MIICMD, 0);
300 VR_SETBIT(sc, VR_MIICMD, VR_MIICMD_DIRECTPGM);
301
302 /* Turn on data xmit. */
303 SIO_SET(VR_MIICMD_DIR);
304
305 vr_mii_sync(sc);
306
307 /* Send command/address info. */
308 vr_mii_send(sc, frame->mii_stdelim, 2);
309 vr_mii_send(sc, frame->mii_opcode, 2);
310 vr_mii_send(sc, frame->mii_phyaddr, 5);
311 vr_mii_send(sc, frame->mii_regaddr, 5);
312
313 /* Idle bit. */
314 SIO_CLR((VR_MIICMD_CLK|VR_MIICMD_DATAIN));
315 DELAY(1);
316 SIO_SET(VR_MIICMD_CLK);
317 DELAY(1);
318
319 /* Turn off xmit. */
320 SIO_CLR(VR_MIICMD_DIR);
321
322 /* Check for ack */
323 SIO_CLR(VR_MIICMD_CLK);
324 DELAY(1);
325 ack = CSR_READ_4(sc, VR_MIICMD) & VR_MIICMD_DATAOUT;
326 SIO_SET(VR_MIICMD_CLK);
327 DELAY(1);
328
329 /*
330 * Now try reading data bits. If the ack failed, we still
331 * need to clock through 16 cycles to keep the PHY(s) in sync.
332 */
333 if (ack) {
334 for(i = 0; i < 16; i++) {
335 SIO_CLR(VR_MIICMD_CLK);
336 DELAY(1);
337 SIO_SET(VR_MIICMD_CLK);
338 DELAY(1);
339 }
340 goto fail;
341 }
342
343 for (i = 0x8000; i; i >>= 1) {
344 SIO_CLR(VR_MIICMD_CLK);
345 DELAY(1);
346 if (!ack) {
347 if (CSR_READ_4(sc, VR_MIICMD) & VR_MIICMD_DATAOUT)
348 frame->mii_data |= i;
349 DELAY(1);
350 }
351 SIO_SET(VR_MIICMD_CLK);
352 DELAY(1);
353 }
354
355 fail:
356 SIO_CLR(VR_MIICMD_CLK);
357 DELAY(1);
358 SIO_SET(VR_MIICMD_CLK);
359 DELAY(1);
360
361 if (ack)
362 return (1);
363 return (0);
364 }
365 #else
366 {
367 int i;
368
369 /* Set the PHY address. */
370 CSR_WRITE_1(sc, VR_PHYADDR, (CSR_READ_1(sc, VR_PHYADDR)& 0xe0)|
371 frame->mii_phyaddr);
372
373 /* Set the register address. */
374 CSR_WRITE_1(sc, VR_MIIADDR, frame->mii_regaddr);
375 VR_SETBIT(sc, VR_MIICMD, VR_MIICMD_READ_ENB);
376
377 for (i = 0; i < 10000; i++) {
378 if ((CSR_READ_1(sc, VR_MIICMD) & VR_MIICMD_READ_ENB) == 0)
379 break;
380 DELAY(1);
381 }
382 frame->mii_data = CSR_READ_2(sc, VR_MIIDATA);
383
384 return (0);
385 }
386 #endif
387
388
389 /*
390 * Write to a PHY register through the MII.
391 */
392 static int
393 vr_mii_writereg(struct vr_softc *sc, struct vr_mii_frame *frame)
394 #ifdef VR_USESWSHIFT
395 {
396 CSR_WRITE_1(sc, VR_MIICMD, 0);
397 VR_SETBIT(sc, VR_MIICMD, VR_MIICMD_DIRECTPGM);
398
399 /* Set up frame for TX. */
400 frame->mii_stdelim = VR_MII_STARTDELIM;
401 frame->mii_opcode = VR_MII_WRITEOP;
402 frame->mii_turnaround = VR_MII_TURNAROUND;
403
404 /* Turn on data output. */
405 SIO_SET(VR_MIICMD_DIR);
406
407 vr_mii_sync(sc);
408
409 vr_mii_send(sc, frame->mii_stdelim, 2);
410 vr_mii_send(sc, frame->mii_opcode, 2);
411 vr_mii_send(sc, frame->mii_phyaddr, 5);
412 vr_mii_send(sc, frame->mii_regaddr, 5);
413 vr_mii_send(sc, frame->mii_turnaround, 2);
414 vr_mii_send(sc, frame->mii_data, 16);
415
416 /* Idle bit. */
417 SIO_SET(VR_MIICMD_CLK);
418 DELAY(1);
419 SIO_CLR(VR_MIICMD_CLK);
420 DELAY(1);
421
422 /* Turn off xmit. */
423 SIO_CLR(VR_MIICMD_DIR);
424
425 return (0);
426 }
427 #else
428 {
429 int i;
430
431 /* Set the PHY address. */
432 CSR_WRITE_1(sc, VR_PHYADDR, (CSR_READ_1(sc, VR_PHYADDR)& 0xe0)|
433 frame->mii_phyaddr);
434
435 /* Set the register address and data to write. */
436 CSR_WRITE_1(sc, VR_MIIADDR, frame->mii_regaddr);
437 CSR_WRITE_2(sc, VR_MIIDATA, frame->mii_data);
438
439 VR_SETBIT(sc, VR_MIICMD, VR_MIICMD_WRITE_ENB);
440
441 for (i = 0; i < 10000; i++) {
442 if ((CSR_READ_1(sc, VR_MIICMD) & VR_MIICMD_WRITE_ENB) == 0)
443 break;
444 DELAY(1);
445 }
446
447 return (0);
448 }
449 #endif
450
451 static int
452 vr_miibus_readreg(device_t dev, uint16_t phy, uint16_t reg)
453 {
454 struct vr_mii_frame frame;
455 struct vr_softc *sc = device_get_softc(dev);
456
457 switch (sc->vr_revid) {
458 case REV_ID_VT6102_APOLLO:
459 if (phy != 1) {
460 frame.mii_data = 0;
461 goto out;
462 }
463 default:
464 break;
465 }
466
467 bzero((char *)&frame, sizeof(frame));
468 frame.mii_phyaddr = phy;
469 frame.mii_regaddr = reg;
470 vr_mii_readreg(sc, &frame);
471
472 out:
473 return (frame.mii_data);
474 }
475
476 static int
477 vr_miibus_writereg(device_t dev, uint16_t phy, uint16_t reg, uint16_t data)
478 {
479 struct vr_mii_frame frame;
480 struct vr_softc *sc = device_get_softc(dev);
481
482 switch (sc->vr_revid) {
483 case REV_ID_VT6102_APOLLO:
484 if (phy != 1)
485 return (0);
486 default:
487 break;
488 }
489
490 bzero((char *)&frame, sizeof(frame));
491 frame.mii_phyaddr = phy;
492 frame.mii_regaddr = reg;
493 frame.mii_data = data;
494 vr_mii_writereg(sc, &frame);
495
496 return (0);
497 }
498
499 static void
500 vr_miibus_statchg(device_t dev)
501 {
502 struct mii_data *mii;
503 struct vr_softc *sc = device_get_softc(dev);
504
505 mii = device_get_softc(sc->vr_miibus);
506 vr_setcfg(sc, mii->mii_media_active);
507 }
508
509 /*
510 * Program the 64-bit multicast hash filter.
511 */
512 static void
513 vr_setmulti(struct vr_softc *sc)
514 {
515 struct ifnet *ifp = &sc->arpcom.ac_if;
516 int h = 0;
517 uint32_t hashes[2] = { 0, 0 };
518 struct ifmultiaddr *ifma;
519 uint8_t rxfilt;
520 int mcnt = 0;
521
522 VR_LOCK_ASSERT(sc);
523
524 rxfilt = CSR_READ_1(sc, VR_RXCFG);
525
526 if (ifp->if_flags & IFF_ALLMULTI || ifp->if_flags & IFF_PROMISC) {
527 rxfilt |= VR_RXCFG_RX_MULTI;
528 CSR_WRITE_1(sc, VR_RXCFG, rxfilt);
529 CSR_WRITE_4(sc, VR_MAR0, 0xFFFFFFFF);
530 CSR_WRITE_4(sc, VR_MAR1, 0xFFFFFFFF);
531 return;
532 }
533
534 /* First, zero out all the existing hash bits. */
535 CSR_WRITE_4(sc, VR_MAR0, 0);
536 CSR_WRITE_4(sc, VR_MAR1, 0);
537
538 /* Now program new ones. */
539 TAILQ_FOREACH(ifma, &ifp->if_multiaddrs, ifma_link) {
540 if (ifma->ifma_addr->sa_family != AF_LINK)
541 continue;
542 h = ether_crc32_be(LLADDR((struct sockaddr_dl *)
543 ifma->ifma_addr), ETHER_ADDR_LEN) >> 26;
544 if (h < 32)
545 hashes[0] |= (1 << h);
546 else
547 hashes[1] |= (1 << (h - 32));
548 mcnt++;
549 }
550
551 if (mcnt)
552 rxfilt |= VR_RXCFG_RX_MULTI;
553 else
554 rxfilt &= ~VR_RXCFG_RX_MULTI;
555
556 CSR_WRITE_4(sc, VR_MAR0, hashes[0]);
557 CSR_WRITE_4(sc, VR_MAR1, hashes[1]);
558 CSR_WRITE_1(sc, VR_RXCFG, rxfilt);
559 }
560
561 /*
562 * In order to fiddle with the
563 * 'full-duplex' and '100Mbps' bits in the netconfig register, we
564 * first have to put the transmit and/or receive logic in the idle state.
565 */
566 static void
567 vr_setcfg(struct vr_softc *sc, int media)
568 {
569 int restart = 0;
570
571 VR_LOCK_ASSERT(sc);
572
573 if (CSR_READ_2(sc, VR_COMMAND) & (VR_CMD_TX_ON|VR_CMD_RX_ON)) {
574 restart = 1;
575 VR_CLRBIT16(sc, VR_COMMAND, (VR_CMD_TX_ON|VR_CMD_RX_ON));
576 }
577
578 if ((media & IFM_GMASK) == IFM_FDX)
579 VR_SETBIT16(sc, VR_COMMAND, VR_CMD_FULLDUPLEX);
580 else
581 VR_CLRBIT16(sc, VR_COMMAND, VR_CMD_FULLDUPLEX);
582
583 if (restart)
584 VR_SETBIT16(sc, VR_COMMAND, VR_CMD_TX_ON|VR_CMD_RX_ON);
585 }
586
587 static void
588 vr_reset(struct vr_softc *sc)
589 {
590 register int i;
591
592 /*VR_LOCK_ASSERT(sc);*/ /* XXX: Called during detach w/o lock. */
593
594 VR_SETBIT16(sc, VR_COMMAND, VR_CMD_RESET);
595
596 for (i = 0; i < VR_TIMEOUT; i++) {
597 DELAY(10);
598 if (!(CSR_READ_2(sc, VR_COMMAND) & VR_CMD_RESET))
599 break;
600 }
601 if (i == VR_TIMEOUT) {
602 if (sc->vr_revid < REV_ID_VT3065_A)
603 printf("vr%d: reset never completed!\n", sc->vr_unit);
604 else {
605 /* Use newer force reset command */
606 printf("vr%d: Using force reset command.\n",
607 sc->vr_unit);
608 VR_SETBIT(sc, VR_MISC_CR1, VR_MISCCR1_FORSRST);
609 }
610 }
611
612 /* Wait a little while for the chip to get its brains in order. */
613 DELAY(1000);
614 }
615
616 /*
617 * Probe for a VIA Rhine chip. Check the PCI vendor and device
618 * IDs against our list and return a device name if we find a match.
619 */
620 static int
621 vr_probe(device_t dev)
622 {
623 struct vr_type *t = vr_devs;
624
625 while (t->vr_name != NULL) {
626 if ((pci_get_vendor(dev) == t->vr_vid) &&
627 (pci_get_device(dev) == t->vr_did)) {
628 device_set_desc(dev, t->vr_name);
629 return (0);
630 }
631 t++;
632 }
633
634 return (ENXIO);
635 }
636
637 /*
638 * Attach the interface. Allocate softc structures, do ifmedia
639 * setup and ethernet/BPF attach.
640 */
641 static int
642 vr_attach(dev)
643 device_t dev;
644 {
645 int i;
646 u_char eaddr[ETHER_ADDR_LEN];
647 struct vr_softc *sc;
648 struct ifnet *ifp;
649 int unit, error = 0, rid;
650
651 sc = device_get_softc(dev);
652 unit = device_get_unit(dev);
653
654 mtx_init(&sc->vr_mtx, device_get_nameunit(dev), MTX_NETWORK_LOCK,
655 MTX_DEF);
656 /*
657 * Map control/status registers.
658 */
659 pci_enable_busmaster(dev);
660 sc->vr_revid = pci_read_config(dev, VR_PCI_REVID, 4) & 0x000000FF;
661
662 rid = VR_RID;
663 sc->vr_res = bus_alloc_resource_any(dev, VR_RES, &rid, RF_ACTIVE);
664
665 if (sc->vr_res == NULL) {
666 printf("vr%d: couldn't map ports/memory\n", unit);
667 error = ENXIO;
668 goto fail;
669 }
670
671 sc->vr_btag = rman_get_bustag(sc->vr_res);
672 sc->vr_bhandle = rman_get_bushandle(sc->vr_res);
673
674 /* Allocate interrupt */
675 rid = 0;
676 sc->vr_irq = bus_alloc_resource_any(dev, SYS_RES_IRQ, &rid,
677 RF_SHAREABLE | RF_ACTIVE);
678
679 if (sc->vr_irq == NULL) {
680 printf("vr%d: couldn't map interrupt\n", unit);
681 error = ENXIO;
682 goto fail;
683 }
684
685 /*
686 * Windows may put the chip in suspend mode when it
687 * shuts down. Be sure to kick it in the head to wake it
688 * up again.
689 */
690 VR_CLRBIT(sc, VR_STICKHW, (VR_STICKHW_DS0|VR_STICKHW_DS1));
691
692 /* Reset the adapter. */
693 vr_reset(sc);
694
695 /*
696 * Turn on bit2 (MIION) in PCI configuration register 0x53 during
697 * initialization and disable AUTOPOLL.
698 */
699 pci_write_config(dev, VR_PCI_MODE,
700 pci_read_config(dev, VR_PCI_MODE, 4) | (VR_MODE3_MIION << 24), 4);
701 VR_CLRBIT(sc, VR_MIICMD, VR_MIICMD_AUTOPOLL);
702
703 /*
704 * Get station address. The way the Rhine chips work,
705 * you're not allowed to directly access the EEPROM once
706 * they've been programmed a special way. Consequently,
707 * we need to read the node address from the PAR0 and PAR1
708 * registers.
709 */
710 VR_SETBIT(sc, VR_EECSR, VR_EECSR_LOAD);
711 DELAY(200);
712 for (i = 0; i < ETHER_ADDR_LEN; i++)
713 eaddr[i] = CSR_READ_1(sc, VR_PAR0 + i);
714
715 sc->vr_unit = unit;
716 bcopy(eaddr, (char *)&sc->arpcom.ac_enaddr, ETHER_ADDR_LEN);
717
718 sc->vr_ldata = contigmalloc(sizeof(struct vr_list_data), M_DEVBUF,
719 M_NOWAIT, 0, 0xffffffff, PAGE_SIZE, 0);
720
721 if (sc->vr_ldata == NULL) {
722 printf("vr%d: no memory for list buffers!\n", unit);
723 error = ENXIO;
724 goto fail;
725 }
726
727 bzero(sc->vr_ldata, sizeof(struct vr_list_data));
728
729 ifp = &sc->arpcom.ac_if;
730 ifp->if_softc = sc;
731 if_initname(ifp, device_get_name(dev), device_get_unit(dev));
732 ifp->if_mtu = ETHERMTU;
733 ifp->if_flags = IFF_BROADCAST | IFF_SIMPLEX | IFF_MULTICAST;
734 ifp->if_ioctl = vr_ioctl;
735 ifp->if_start = vr_start;
736 ifp->if_watchdog = vr_watchdog;
737 ifp->if_init = vr_init;
738 ifp->if_baudrate = 10000000;
739 IFQ_SET_MAXLEN(&ifp->if_snd, VR_TX_LIST_CNT - 1);
740 ifp->if_snd.ifq_maxlen = VR_TX_LIST_CNT - 1;
741 IFQ_SET_READY(&ifp->if_snd);
742 #ifdef DEVICE_POLLING
743 ifp->if_capabilities |= IFCAP_POLLING;
744 #endif
745 ifp->if_capenable = ifp->if_capabilities;
746
747 /* Do MII setup. */
748 if (mii_phy_probe(dev, &sc->vr_miibus,
749 vr_ifmedia_upd, vr_ifmedia_sts)) {
750 printf("vr%d: MII without any phy!\n", sc->vr_unit);
751 error = ENXIO;
752 goto fail;
753 }
754
755 callout_handle_init(&sc->vr_stat_ch);
756
757 /* Call MI attach routine. */
758 ether_ifattach(ifp, eaddr);
759
760 sc->suspended = 0;
761
762 /* Hook interrupt last to avoid having to lock softc */
763 error = bus_setup_intr(dev, sc->vr_irq, INTR_TYPE_NET | INTR_MPSAFE,
764 vr_intr, sc, &sc->vr_intrhand);
765
766 if (error) {
767 printf("vr%d: couldn't set up irq\n", unit);
768 ether_ifdetach(ifp);
769 goto fail;
770 }
771
772 fail:
773 if (error)
774 vr_detach(dev);
775
776 return (error);
777 }
778
779 /*
780 * Shutdown hardware and free up resources. This can be called any
781 * time after the mutex has been initialized. It is called in both
782 * the error case in attach and the normal detach case so it needs
783 * to be careful about only freeing resources that have actually been
784 * allocated.
785 */
786 static int
787 vr_detach(device_t dev)
788 {
789 struct vr_softc *sc = device_get_softc(dev);
790 struct ifnet *ifp = &sc->arpcom.ac_if;
791
792 KASSERT(mtx_initialized(&sc->vr_mtx), ("vr mutex not initialized"));
793
794 VR_LOCK(sc);
795
796 sc->suspended = 1;
797
798 /* These should only be active if attach succeeded */
799 if (device_is_attached(dev)) {
800 vr_stop(sc);
801 VR_UNLOCK(sc); /* XXX: Avoid recursive acquire. */
802 ether_ifdetach(ifp);
803 VR_LOCK(sc);
804 }
805 if (sc->vr_miibus)
806 device_delete_child(dev, sc->vr_miibus);
807 bus_generic_detach(dev);
808
809 if (sc->vr_intrhand)
810 bus_teardown_intr(dev, sc->vr_irq, sc->vr_intrhand);
811 if (sc->vr_irq)
812 bus_release_resource(dev, SYS_RES_IRQ, 0, sc->vr_irq);
813 if (sc->vr_res)
814 bus_release_resource(dev, VR_RES, VR_RID, sc->vr_res);
815
816 if (sc->vr_ldata)
817 contigfree(sc->vr_ldata, sizeof(struct vr_list_data), M_DEVBUF);
818
819 VR_UNLOCK(sc);
820 mtx_destroy(&sc->vr_mtx);
821
822 return (0);
823 }
824
825 /*
826 * Initialize the transmit descriptors.
827 */
828 static int
829 vr_list_tx_init(struct vr_softc *sc)
830 {
831 struct vr_chain_data *cd;
832 struct vr_list_data *ld;
833 int i;
834
835 cd = &sc->vr_cdata;
836 ld = sc->vr_ldata;
837 for (i = 0; i < VR_TX_LIST_CNT; i++) {
838 cd->vr_tx_chain[i].vr_ptr = &ld->vr_tx_list[i];
839 if (i == (VR_TX_LIST_CNT - 1))
840 cd->vr_tx_chain[i].vr_nextdesc =
841 &cd->vr_tx_chain[0];
842 else
843 cd->vr_tx_chain[i].vr_nextdesc =
844 &cd->vr_tx_chain[i + 1];
845 }
846 cd->vr_tx_cons = cd->vr_tx_prod = &cd->vr_tx_chain[0];
847
848 return (0);
849 }
850
851
852 /*
853 * Initialize the RX descriptors and allocate mbufs for them. Note that
854 * we arrange the descriptors in a closed ring, so that the last descriptor
855 * points back to the first.
856 */
857 static int
858 vr_list_rx_init(struct vr_softc *sc)
859 {
860 struct vr_chain_data *cd;
861 struct vr_list_data *ld;
862 int i;
863
864 VR_LOCK_ASSERT(sc);
865
866 cd = &sc->vr_cdata;
867 ld = sc->vr_ldata;
868
869 for (i = 0; i < VR_RX_LIST_CNT; i++) {
870 cd->vr_rx_chain[i].vr_ptr =
871 (struct vr_desc *)&ld->vr_rx_list[i];
872 if (vr_newbuf(sc, &cd->vr_rx_chain[i], NULL) == ENOBUFS)
873 return (ENOBUFS);
874 if (i == (VR_RX_LIST_CNT - 1)) {
875 cd->vr_rx_chain[i].vr_nextdesc =
876 &cd->vr_rx_chain[0];
877 ld->vr_rx_list[i].vr_next =
878 vtophys(&ld->vr_rx_list[0]);
879 } else {
880 cd->vr_rx_chain[i].vr_nextdesc =
881 &cd->vr_rx_chain[i + 1];
882 ld->vr_rx_list[i].vr_next =
883 vtophys(&ld->vr_rx_list[i + 1]);
884 }
885 }
886
887 cd->vr_rx_head = &cd->vr_rx_chain[0];
888
889 return (0);
890 }
891
892 /*
893 * Initialize an RX descriptor and attach an MBUF cluster.
894 * Note: the length fields are only 11 bits wide, which means the
895 * largest size we can specify is 2047. This is important because
896 * MCLBYTES is 2048, so we have to subtract one otherwise we'll
897 * overflow the field and make a mess.
898 */
899 static int
900 vr_newbuf(struct vr_softc *sc, struct vr_chain_onefrag *c, struct mbuf *m)
901 {
902 struct mbuf *m_new = NULL;
903
904 if (m == NULL) {
905 MGETHDR(m_new, M_DONTWAIT, MT_DATA);
906 if (m_new == NULL)
907 return (ENOBUFS);
908
909 MCLGET(m_new, M_DONTWAIT);
910 if (!(m_new->m_flags & M_EXT)) {
911 m_freem(m_new);
912 return (ENOBUFS);
913 }
914 m_new->m_len = m_new->m_pkthdr.len = MCLBYTES;
915 } else {
916 m_new = m;
917 m_new->m_len = m_new->m_pkthdr.len = MCLBYTES;
918 m_new->m_data = m_new->m_ext.ext_buf;
919 }
920
921 m_adj(m_new, sizeof(uint64_t));
922
923 c->vr_mbuf = m_new;
924 c->vr_ptr->vr_status = VR_RXSTAT;
925 c->vr_ptr->vr_data = vtophys(mtod(m_new, caddr_t));
926 c->vr_ptr->vr_ctl = VR_RXCTL | VR_RXLEN;
927
928 return (0);
929 }
930
931 /*
932 * A frame has been uploaded: pass the resulting mbuf chain up to
933 * the higher level protocols.
934 */
935 static void
936 vr_rxeof(struct vr_softc *sc)
937 {
938 struct mbuf *m, *m0;
939 struct ifnet *ifp;
940 struct vr_chain_onefrag *cur_rx;
941 int total_len = 0;
942 uint32_t rxstat;
943
944 VR_LOCK_ASSERT(sc);
945 ifp = &sc->arpcom.ac_if;
946
947 while (!((rxstat = sc->vr_cdata.vr_rx_head->vr_ptr->vr_status) &
948 VR_RXSTAT_OWN)) {
949 #ifdef DEVICE_POLLING
950 if (ifp->if_flags & IFF_POLLING) {
951 if (sc->rxcycles <= 0)
952 break;
953 sc->rxcycles--;
954 }
955 #endif /* DEVICE_POLLING */
956 m0 = NULL;
957 cur_rx = sc->vr_cdata.vr_rx_head;
958 sc->vr_cdata.vr_rx_head = cur_rx->vr_nextdesc;
959 m = cur_rx->vr_mbuf;
960
961 /*
962 * If an error occurs, update stats, clear the
963 * status word and leave the mbuf cluster in place:
964 * it should simply get re-used next time this descriptor
965 * comes up in the ring.
966 */
967 if (rxstat & VR_RXSTAT_RXERR) {
968 ifp->if_ierrors++;
969 printf("vr%d: rx error (%02x):", sc->vr_unit,
970 rxstat & 0x000000ff);
971 if (rxstat & VR_RXSTAT_CRCERR)
972 printf(" crc error");
973 if (rxstat & VR_RXSTAT_FRAMEALIGNERR)
974 printf(" frame alignment error\n");
975 if (rxstat & VR_RXSTAT_FIFOOFLOW)
976 printf(" FIFO overflow");
977 if (rxstat & VR_RXSTAT_GIANT)
978 printf(" received giant packet");
979 if (rxstat & VR_RXSTAT_RUNT)
980 printf(" received runt packet");
981 if (rxstat & VR_RXSTAT_BUSERR)
982 printf(" system bus error");
983 if (rxstat & VR_RXSTAT_BUFFERR)
984 printf("rx buffer error");
985 printf("\n");
986 vr_newbuf(sc, cur_rx, m);
987 continue;
988 }
989
990 /* No errors; receive the packet. */
991 total_len = VR_RXBYTES(cur_rx->vr_ptr->vr_status);
992
993 /*
994 * XXX The VIA Rhine chip includes the CRC with every
995 * received frame, and there's no way to turn this
996 * behavior off (at least, I can't find anything in
997 * the manual that explains how to do it) so we have
998 * to trim off the CRC manually.
999 */
1000 total_len -= ETHER_CRC_LEN;
1001
1002 m0 = m_devget(mtod(m, char *), total_len, ETHER_ALIGN, ifp,
1003 NULL);
1004 vr_newbuf(sc, cur_rx, m);
1005 if (m0 == NULL) {
1006 ifp->if_ierrors++;
1007 continue;
1008 }
1009 m = m0;
1010
1011 ifp->if_ipackets++;
1012 VR_UNLOCK(sc);
1013 (*ifp->if_input)(ifp, m);
1014 VR_LOCK(sc);
1015 }
1016 }
1017
1018 static void
1019 vr_rxeoc(struct vr_softc *sc)
1020 {
1021 struct ifnet *ifp = &sc->arpcom.ac_if;
1022 int i;
1023
1024 VR_LOCK_ASSERT(sc);
1025
1026 ifp->if_ierrors++;
1027
1028 VR_CLRBIT16(sc, VR_COMMAND, VR_CMD_RX_ON);
1029 DELAY(10000);
1030
1031 /* Wait for receiver to stop */
1032 for (i = 0x400;
1033 i && (CSR_READ_2(sc, VR_COMMAND) & VR_CMD_RX_ON);
1034 i--) {
1035 ;
1036 }
1037
1038 if (!i) {
1039 printf("vr%d: rx shutdown error!\n", sc->vr_unit);
1040 sc->vr_flags |= VR_F_RESTART;
1041 return;
1042 }
1043
1044 vr_rxeof(sc);
1045
1046 CSR_WRITE_4(sc, VR_RXADDR, vtophys(sc->vr_cdata.vr_rx_head->vr_ptr));
1047 VR_SETBIT16(sc, VR_COMMAND, VR_CMD_RX_ON);
1048 VR_SETBIT16(sc, VR_COMMAND, VR_CMD_RX_GO);
1049 }
1050
1051 /*
1052 * A frame was downloaded to the chip. It's safe for us to clean up
1053 * the list buffers.
1054 */
1055 static void
1056 vr_txeof(struct vr_softc *sc)
1057 {
1058 struct vr_chain *cur_tx;
1059 struct ifnet *ifp = &sc->arpcom.ac_if;
1060
1061 VR_LOCK_ASSERT(sc);
1062
1063 /*
1064 * Go through our tx list and free mbufs for those
1065 * frames that have been transmitted.
1066 */
1067 cur_tx = sc->vr_cdata.vr_tx_cons;
1068 while (cur_tx->vr_mbuf != NULL) {
1069 uint32_t txstat;
1070 int i;
1071
1072 txstat = cur_tx->vr_ptr->vr_status;
1073
1074 if ((txstat & VR_TXSTAT_ABRT) ||
1075 (txstat & VR_TXSTAT_UDF)) {
1076 for (i = 0x400;
1077 i && (CSR_READ_2(sc, VR_COMMAND) & VR_CMD_TX_ON);
1078 i--)
1079 ; /* Wait for chip to shutdown */
1080 if (!i) {
1081 printf("vr%d: tx shutdown timeout\n",
1082 sc->vr_unit);
1083 sc->vr_flags |= VR_F_RESTART;
1084 break;
1085 }
1086 VR_TXOWN(cur_tx) = VR_TXSTAT_OWN;
1087 CSR_WRITE_4(sc, VR_TXADDR, vtophys(cur_tx->vr_ptr));
1088 break;
1089 }
1090
1091 if (txstat & VR_TXSTAT_OWN)
1092 break;
1093
1094 if (txstat & VR_TXSTAT_ERRSUM) {
1095 ifp->if_oerrors++;
1096 if (txstat & VR_TXSTAT_DEFER)
1097 ifp->if_collisions++;
1098 if (txstat & VR_TXSTAT_LATECOLL)
1099 ifp->if_collisions++;
1100 }
1101
1102 ifp->if_collisions +=(txstat & VR_TXSTAT_COLLCNT) >> 3;
1103
1104 ifp->if_opackets++;
1105 m_freem(cur_tx->vr_mbuf);
1106 cur_tx->vr_mbuf = NULL;
1107 ifp->if_flags &= ~IFF_OACTIVE;
1108
1109 cur_tx = cur_tx->vr_nextdesc;
1110 }
1111 sc->vr_cdata.vr_tx_cons = cur_tx;
1112 if (cur_tx->vr_mbuf == NULL)
1113 ifp->if_timer = 0;
1114 }
1115
1116 static void
1117 vr_tick(void *xsc)
1118 {
1119 struct vr_softc *sc = xsc;
1120 struct mii_data *mii;
1121
1122 VR_LOCK(sc);
1123
1124 if (sc->vr_flags & VR_F_RESTART) {
1125 printf("vr%d: restarting\n", sc->vr_unit);
1126 vr_stop(sc);
1127 vr_reset(sc);
1128 vr_init_locked(sc);
1129 sc->vr_flags &= ~VR_F_RESTART;
1130 }
1131
1132 mii = device_get_softc(sc->vr_miibus);
1133 mii_tick(mii);
1134 sc->vr_stat_ch = timeout(vr_tick, sc, hz);
1135
1136 VR_UNLOCK(sc);
1137 }
1138
1139 #ifdef DEVICE_POLLING
1140 static poll_handler_t vr_poll;
1141 static poll_handler_t vr_poll_locked;
1142
1143 static void
1144 vr_poll(struct ifnet *ifp, enum poll_cmd cmd, int count)
1145 {
1146 struct vr_softc *sc = ifp->if_softc;
1147
1148 VR_LOCK(sc);
1149 vr_poll_locked(ifp, cmd, count);
1150 VR_UNLOCK(sc);
1151 }
1152
1153 static void
1154 vr_poll_locked(struct ifnet *ifp, enum poll_cmd cmd, int count)
1155 {
1156 struct vr_softc *sc = ifp->if_softc;
1157
1158 VR_LOCK_ASSERT(sc);
1159
1160 if (!(ifp->if_capenable & IFCAP_POLLING)) {
1161 ether_poll_deregister(ifp);
1162 cmd = POLL_DEREGISTER;
1163 }
1164
1165 if (cmd == POLL_DEREGISTER) {
1166 /* Final call, enable interrupts. */
1167 CSR_WRITE_2(sc, VR_IMR, VR_INTRS);
1168 return;
1169 }
1170
1171 sc->rxcycles = count;
1172 vr_rxeof(sc);
1173 vr_txeof(sc);
1174 if (!IFQ_DRV_IS_EMPTY(&ifp->if_snd))
1175 vr_start_locked(ifp);
1176
1177 if (cmd == POLL_AND_CHECK_STATUS) {
1178 uint16_t status;
1179
1180 /* Also check status register. */
1181 status = CSR_READ_2(sc, VR_ISR);
1182 if (status)
1183 CSR_WRITE_2(sc, VR_ISR, status);
1184
1185 if ((status & VR_INTRS) == 0)
1186 return;
1187
1188 if (status & VR_ISR_RX_DROPPED) {
1189 printf("vr%d: rx packet lost\n", sc->vr_unit);
1190 ifp->if_ierrors++;
1191 }
1192
1193 if ((status & VR_ISR_RX_ERR) || (status & VR_ISR_RX_NOBUF) ||
1194 (status & VR_ISR_RX_NOBUF) || (status & VR_ISR_RX_OFLOW)) {
1195 printf("vr%d: receive error (%04x)",
1196 sc->vr_unit, status);
1197 if (status & VR_ISR_RX_NOBUF)
1198 printf(" no buffers");
1199 if (status & VR_ISR_RX_OFLOW)
1200 printf(" overflow");
1201 if (status & VR_ISR_RX_DROPPED)
1202 printf(" packet lost");
1203 printf("\n");
1204 vr_rxeoc(sc);
1205 }
1206
1207 if ((status & VR_ISR_BUSERR) ||
1208 (status & VR_ISR_TX_UNDERRUN)) {
1209 vr_reset(sc);
1210 vr_init_locked(sc);
1211 return;
1212 }
1213
1214 if ((status & VR_ISR_UDFI) ||
1215 (status & VR_ISR_TX_ABRT2) ||
1216 (status & VR_ISR_TX_ABRT)) {
1217 ifp->if_oerrors++;
1218 if (sc->vr_cdata.vr_tx_cons->vr_mbuf != NULL) {
1219 VR_SETBIT16(sc, VR_COMMAND, VR_CMD_TX_ON);
1220 VR_SETBIT16(sc, VR_COMMAND, VR_CMD_TX_GO);
1221 }
1222 }
1223 }
1224 }
1225 #endif /* DEVICE_POLLING */
1226
1227 static void
1228 vr_intr(void *arg)
1229 {
1230 struct vr_softc *sc = arg;
1231 struct ifnet *ifp = &sc->arpcom.ac_if;
1232 uint16_t status;
1233
1234 VR_LOCK(sc);
1235
1236 if (sc->suspended) {
1237 /*
1238 * Forcibly disable interrupts.
1239 * XXX: Mobile VIA based platforms may need
1240 * interrupt re-enable on resume.
1241 */
1242 CSR_WRITE_2(sc, VR_IMR, 0x0000);
1243 goto done_locked;
1244 }
1245
1246 #ifdef DEVICE_POLLING
1247 if (ifp->if_flags & IFF_POLLING)
1248 goto done_locked;
1249
1250 if ((ifp->if_capenable & IFCAP_POLLING) &&
1251 ether_poll_register(vr_poll, ifp)) {
1252 /* OK, disable interrupts. */
1253 CSR_WRITE_2(sc, VR_IMR, 0x0000);
1254 vr_poll_locked(ifp, 0, 1);
1255 goto done_locked;
1256 }
1257 #endif /* DEVICE_POLLING */
1258
1259 /* Suppress unwanted interrupts. */
1260 if (!(ifp->if_flags & IFF_UP)) {
1261 vr_stop(sc);
1262 goto done_locked;
1263 }
1264
1265 /* Disable interrupts. */
1266 CSR_WRITE_2(sc, VR_IMR, 0x0000);
1267
1268 for (;;) {
1269 status = CSR_READ_2(sc, VR_ISR);
1270 if (status)
1271 CSR_WRITE_2(sc, VR_ISR, status);
1272
1273 if ((status & VR_INTRS) == 0)
1274 break;
1275
1276 if (status & VR_ISR_RX_OK)
1277 vr_rxeof(sc);
1278
1279 if (status & VR_ISR_RX_DROPPED) {
1280 printf("vr%d: rx packet lost\n", sc->vr_unit);
1281 ifp->if_ierrors++;
1282 }
1283
1284 if ((status & VR_ISR_RX_ERR) || (status & VR_ISR_RX_NOBUF) ||
1285 (status & VR_ISR_RX_NOBUF) || (status & VR_ISR_RX_OFLOW)) {
1286 printf("vr%d: receive error (%04x)",
1287 sc->vr_unit, status);
1288 if (status & VR_ISR_RX_NOBUF)
1289 printf(" no buffers");
1290 if (status & VR_ISR_RX_OFLOW)
1291 printf(" overflow");
1292 if (status & VR_ISR_RX_DROPPED)
1293 printf(" packet lost");
1294 printf("\n");
1295 vr_rxeoc(sc);
1296 }
1297
1298 if ((status & VR_ISR_BUSERR) || (status & VR_ISR_TX_UNDERRUN)) {
1299 vr_reset(sc);
1300 vr_init_locked(sc);
1301 break;
1302 }
1303
1304 if ((status & VR_ISR_TX_OK) || (status & VR_ISR_TX_ABRT) ||
1305 (status & VR_ISR_TX_ABRT2) || (status & VR_ISR_UDFI)) {
1306 vr_txeof(sc);
1307 if ((status & VR_ISR_UDFI) ||
1308 (status & VR_ISR_TX_ABRT2) ||
1309 (status & VR_ISR_TX_ABRT)) {
1310 ifp->if_oerrors++;
1311 if (sc->vr_cdata.vr_tx_cons->vr_mbuf != NULL) {
1312 VR_SETBIT16(sc, VR_COMMAND,
1313 VR_CMD_TX_ON);
1314 VR_SETBIT16(sc, VR_COMMAND,
1315 VR_CMD_TX_GO);
1316 }
1317 }
1318 }
1319 }
1320
1321 /* Re-enable interrupts. */
1322 CSR_WRITE_2(sc, VR_IMR, VR_INTRS);
1323
1324 if (!IFQ_DRV_IS_EMPTY(&ifp->if_snd))
1325 vr_start_locked(ifp);
1326
1327 done_locked:
1328 VR_UNLOCK(sc);
1329 }
1330
1331 /*
1332 * Encapsulate an mbuf chain in a descriptor by coupling the mbuf data
1333 * pointers to the fragment pointers.
1334 */
1335 static int
1336 vr_encap(struct vr_softc *sc, struct vr_chain *c, struct mbuf *m_head)
1337 {
1338 struct vr_desc *f = NULL;
1339 struct mbuf *m;
1340
1341 VR_LOCK_ASSERT(sc);
1342 /*
1343 * The VIA Rhine wants packet buffers to be longword
1344 * aligned, but very often our mbufs aren't. Rather than
1345 * waste time trying to decide when to copy and when not
1346 * to copy, just do it all the time.
1347 */
1348 m = m_defrag(m_head, M_DONTWAIT);
1349 if (m == NULL)
1350 return (1);
1351
1352 /*
1353 * The Rhine chip doesn't auto-pad, so we have to make
1354 * sure to pad short frames out to the minimum frame length
1355 * ourselves.
1356 */
1357 if (m->m_len < VR_MIN_FRAMELEN) {
1358 m->m_pkthdr.len += VR_MIN_FRAMELEN - m->m_len;
1359 m->m_len = m->m_pkthdr.len;
1360 }
1361
1362 c->vr_mbuf = m;
1363 f = c->vr_ptr;
1364 f->vr_data = vtophys(mtod(m, caddr_t));
1365 f->vr_ctl = m->m_len;
1366 f->vr_ctl |= VR_TXCTL_TLINK|VR_TXCTL_FIRSTFRAG;
1367 f->vr_status = 0;
1368 f->vr_ctl |= VR_TXCTL_LASTFRAG|VR_TXCTL_FINT;
1369 f->vr_next = vtophys(c->vr_nextdesc->vr_ptr);
1370
1371 return (0);
1372 }
1373
1374 /*
1375 * Main transmit routine. To avoid having to do mbuf copies, we put pointers
1376 * to the mbuf data regions directly in the transmit lists. We also save a
1377 * copy of the pointers since the transmit list fragment pointers are
1378 * physical addresses.
1379 */
1380
1381 static void
1382 vr_start(struct ifnet *ifp)
1383 {
1384 struct vr_softc *sc = ifp->if_softc;
1385
1386 VR_LOCK(sc);
1387 vr_start_locked(ifp);
1388 VR_UNLOCK(sc);
1389 }
1390
1391 static void
1392 vr_start_locked(struct ifnet *ifp)
1393 {
1394 struct vr_softc *sc = ifp->if_softc;
1395 struct mbuf *m_head;
1396 struct vr_chain *cur_tx;
1397
1398 if (ifp->if_flags & IFF_OACTIVE)
1399 return;
1400
1401 cur_tx = sc->vr_cdata.vr_tx_prod;
1402 while (cur_tx->vr_mbuf == NULL) {
1403 IFQ_DRV_DEQUEUE(&ifp->if_snd, m_head);
1404 if (m_head == NULL)
1405 break;
1406
1407 /* Pack the data into the descriptor. */
1408 if (vr_encap(sc, cur_tx, m_head)) {
1409 /* Rollback, send what we were able to encap. */
1410 IFQ_DRV_PREPEND(&ifp->if_snd, m_head);
1411 break;
1412 }
1413
1414 VR_TXOWN(cur_tx) = VR_TXSTAT_OWN;
1415
1416 /*
1417 * If there's a BPF listener, bounce a copy of this frame
1418 * to him.
1419 */
1420 BPF_MTAP(ifp, cur_tx->vr_mbuf);
1421
1422 cur_tx = cur_tx->vr_nextdesc;
1423 }
1424 if (cur_tx != sc->vr_cdata.vr_tx_prod || cur_tx->vr_mbuf != NULL) {
1425 sc->vr_cdata.vr_tx_prod = cur_tx;
1426
1427 /* Tell the chip to start transmitting. */
1428 VR_SETBIT16(sc, VR_COMMAND, /*VR_CMD_TX_ON|*/ VR_CMD_TX_GO);
1429
1430 /* Set a timeout in case the chip goes out to lunch. */
1431 ifp->if_timer = 5;
1432
1433 if (cur_tx->vr_mbuf != NULL)
1434 ifp->if_flags |= IFF_OACTIVE;
1435 }
1436 }
1437
1438 static void
1439 vr_init(void *xsc)
1440 {
1441 struct vr_softc *sc = xsc;
1442
1443 VR_LOCK(sc);
1444 vr_init_locked(sc);
1445 VR_UNLOCK(sc);
1446 }
1447
1448 static void
1449 vr_init_locked(struct vr_softc *sc)
1450 {
1451 struct ifnet *ifp = &sc->arpcom.ac_if;
1452 struct mii_data *mii;
1453 int i;
1454
1455 VR_LOCK_ASSERT(sc);
1456
1457 mii = device_get_softc(sc->vr_miibus);
1458
1459 /* Cancel pending I/O and free all RX/TX buffers. */
1460 vr_stop(sc);
1461 vr_reset(sc);
1462
1463 /* Set our station address. */
1464 for (i = 0; i < ETHER_ADDR_LEN; i++)
1465 CSR_WRITE_1(sc, VR_PAR0 + i, sc->arpcom.ac_enaddr[i]);
1466
1467 /* Set DMA size. */
1468 VR_CLRBIT(sc, VR_BCR0, VR_BCR0_DMA_LENGTH);
1469 VR_SETBIT(sc, VR_BCR0, VR_BCR0_DMA_STORENFWD);
1470
1471 /*
1472 * BCR0 and BCR1 can override the RXCFG and TXCFG registers,
1473 * so we must set both.
1474 */
1475 VR_CLRBIT(sc, VR_BCR0, VR_BCR0_RX_THRESH);
1476 VR_SETBIT(sc, VR_BCR0, VR_BCR0_RXTHRESH128BYTES);
1477
1478 VR_CLRBIT(sc, VR_BCR1, VR_BCR1_TX_THRESH);
1479 VR_SETBIT(sc, VR_BCR1, VR_BCR1_TXTHRESHSTORENFWD);
1480
1481 VR_CLRBIT(sc, VR_RXCFG, VR_RXCFG_RX_THRESH);
1482 VR_SETBIT(sc, VR_RXCFG, VR_RXTHRESH_128BYTES);
1483
1484 VR_CLRBIT(sc, VR_TXCFG, VR_TXCFG_TX_THRESH);
1485 VR_SETBIT(sc, VR_TXCFG, VR_TXTHRESH_STORENFWD);
1486
1487 /* Init circular RX list. */
1488 if (vr_list_rx_init(sc) == ENOBUFS) {
1489 printf(
1490 "vr%d: initialization failed: no memory for rx buffers\n", sc->vr_unit);
1491 vr_stop(sc);
1492 return;
1493 }
1494
1495 /* Init tx descriptors. */
1496 vr_list_tx_init(sc);
1497
1498 /* If we want promiscuous mode, set the allframes bit. */
1499 if (ifp->if_flags & IFF_PROMISC)
1500 VR_SETBIT(sc, VR_RXCFG, VR_RXCFG_RX_PROMISC);
1501 else
1502 VR_CLRBIT(sc, VR_RXCFG, VR_RXCFG_RX_PROMISC);
1503
1504 /* Set capture broadcast bit to capture broadcast frames. */
1505 if (ifp->if_flags & IFF_BROADCAST)
1506 VR_SETBIT(sc, VR_RXCFG, VR_RXCFG_RX_BROAD);
1507 else
1508 VR_CLRBIT(sc, VR_RXCFG, VR_RXCFG_RX_BROAD);
1509
1510 /*
1511 * Program the multicast filter, if necessary.
1512 */
1513 vr_setmulti(sc);
1514
1515 /*
1516 * Load the address of the RX list.
1517 */
1518 CSR_WRITE_4(sc, VR_RXADDR, vtophys(sc->vr_cdata.vr_rx_head->vr_ptr));
1519
1520 /* Enable receiver and transmitter. */
1521 CSR_WRITE_2(sc, VR_COMMAND, VR_CMD_TX_NOPOLL|VR_CMD_START|
1522 VR_CMD_TX_ON|VR_CMD_RX_ON|
1523 VR_CMD_RX_GO);
1524
1525 CSR_WRITE_4(sc, VR_TXADDR, vtophys(&sc->vr_ldata->vr_tx_list[0]));
1526
1527 CSR_WRITE_2(sc, VR_ISR, 0xFFFF);
1528 #ifdef DEVICE_POLLING
1529 /*
1530 * Disable interrupts if we are polling.
1531 */
1532 if (ifp->if_flags & IFF_POLLING)
1533 CSR_WRITE_2(sc, VR_IMR, 0);
1534 else
1535 #endif /* DEVICE_POLLING */
1536 /*
1537 * Enable interrupts.
1538 */
1539 CSR_WRITE_2(sc, VR_IMR, VR_INTRS);
1540
1541 mii_mediachg(mii);
1542
1543 ifp->if_flags |= IFF_RUNNING;
1544 ifp->if_flags &= ~IFF_OACTIVE;
1545
1546 sc->vr_stat_ch = timeout(vr_tick, sc, hz);
1547 }
1548
1549 /*
1550 * Set media options.
1551 */
1552 static int
1553 vr_ifmedia_upd(struct ifnet *ifp)
1554 {
1555 struct vr_softc *sc = ifp->if_softc;
1556
1557 if (ifp->if_flags & IFF_UP)
1558 vr_init(sc);
1559
1560 return (0);
1561 }
1562
1563 /*
1564 * Report current media status.
1565 */
1566 static void
1567 vr_ifmedia_sts(struct ifnet *ifp, struct ifmediareq *ifmr)
1568 {
1569 struct vr_softc *sc = ifp->if_softc;
1570 struct mii_data *mii;
1571
1572 mii = device_get_softc(sc->vr_miibus);
1573 VR_LOCK(sc);
1574 mii_pollstat(mii);
1575 VR_UNLOCK(sc);
1576 ifmr->ifm_active = mii->mii_media_active;
1577 ifmr->ifm_status = mii->mii_media_status;
1578 }
1579
1580 static int
1581 vr_ioctl(struct ifnet *ifp, u_long command, caddr_t data)
1582 {
1583 struct vr_softc *sc = ifp->if_softc;
1584 struct ifreq *ifr = (struct ifreq *) data;
1585 struct mii_data *mii;
1586 int error = 0;
1587
1588 switch (command) {
1589 case SIOCSIFFLAGS:
1590 VR_LOCK(sc);
1591 if (ifp->if_flags & IFF_UP) {
1592 vr_init_locked(sc);
1593 } else {
1594 if (ifp->if_flags & IFF_RUNNING)
1595 vr_stop(sc);
1596 }
1597 VR_UNLOCK(sc);
1598 error = 0;
1599 break;
1600 case SIOCADDMULTI:
1601 case SIOCDELMULTI:
1602 VR_LOCK(sc);
1603 vr_setmulti(sc);
1604 VR_UNLOCK(sc);
1605 error = 0;
1606 break;
1607 case SIOCGIFMEDIA:
1608 case SIOCSIFMEDIA:
1609 mii = device_get_softc(sc->vr_miibus);
1610 error = ifmedia_ioctl(ifp, ifr, &mii->mii_media, command);
1611 break;
1612 case SIOCSIFCAP:
1613 ifp->if_capenable = ifr->ifr_reqcap;
1614 break;
1615 default:
1616 error = ether_ioctl(ifp, command, data);
1617 break;
1618 }
1619
1620 return (error);
1621 }
1622
1623 static void
1624 vr_watchdog(struct ifnet *ifp)
1625 {
1626 struct vr_softc *sc = ifp->if_softc;
1627
1628 VR_LOCK(sc);
1629
1630 ifp->if_oerrors++;
1631 printf("vr%d: watchdog timeout\n", sc->vr_unit);
1632
1633 vr_stop(sc);
1634 vr_reset(sc);
1635 vr_init_locked(sc);
1636
1637 if (!IFQ_DRV_IS_EMPTY(&ifp->if_snd))
1638 vr_start_locked(ifp);
1639
1640 VR_UNLOCK(sc);
1641 }
1642
1643 /*
1644 * Stop the adapter and free any mbufs allocated to the
1645 * RX and TX lists.
1646 */
1647 static void
1648 vr_stop(struct vr_softc *sc)
1649 {
1650 register int i;
1651 struct ifnet *ifp;
1652
1653 VR_LOCK_ASSERT(sc);
1654
1655 ifp = &sc->arpcom.ac_if;
1656 ifp->if_timer = 0;
1657
1658 untimeout(vr_tick, sc, sc->vr_stat_ch);
1659 ifp->if_flags &= ~(IFF_RUNNING | IFF_OACTIVE);
1660 #ifdef DEVICE_POLLING
1661 ether_poll_deregister(ifp);
1662 #endif /* DEVICE_POLLING */
1663
1664 VR_SETBIT16(sc, VR_COMMAND, VR_CMD_STOP);
1665 VR_CLRBIT16(sc, VR_COMMAND, (VR_CMD_RX_ON|VR_CMD_TX_ON));
1666 CSR_WRITE_2(sc, VR_IMR, 0x0000);
1667 CSR_WRITE_4(sc, VR_TXADDR, 0x00000000);
1668 CSR_WRITE_4(sc, VR_RXADDR, 0x00000000);
1669
1670 /*
1671 * Free data in the RX lists.
1672 */
1673 for (i = 0; i < VR_RX_LIST_CNT; i++) {
1674 if (sc->vr_cdata.vr_rx_chain[i].vr_mbuf != NULL) {
1675 m_freem(sc->vr_cdata.vr_rx_chain[i].vr_mbuf);
1676 sc->vr_cdata.vr_rx_chain[i].vr_mbuf = NULL;
1677 }
1678 }
1679 bzero((char *)&sc->vr_ldata->vr_rx_list,
1680 sizeof(sc->vr_ldata->vr_rx_list));
1681
1682 /*
1683 * Free the TX list buffers.
1684 */
1685 for (i = 0; i < VR_TX_LIST_CNT; i++) {
1686 if (sc->vr_cdata.vr_tx_chain[i].vr_mbuf != NULL) {
1687 m_freem(sc->vr_cdata.vr_tx_chain[i].vr_mbuf);
1688 sc->vr_cdata.vr_tx_chain[i].vr_mbuf = NULL;
1689 }
1690 }
1691 bzero((char *)&sc->vr_ldata->vr_tx_list,
1692 sizeof(sc->vr_ldata->vr_tx_list));
1693 }
1694
1695 /*
1696 * Stop all chip I/O so that the kernel's probe routines don't
1697 * get confused by errant DMAs when rebooting.
1698 */
1699 static void
1700 vr_shutdown(device_t dev)
1701 {
1702
1703 vr_detach(dev);
1704 }
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