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linprocfs - Introduce /proc/mounts
[dragonfly.git] / sys / dev / netif / et / if_et.c
blob30f690061f9890d5b84f9f8db15621258f720086
1 /*
2 * Copyright (c) 2007 The DragonFly Project. All rights reserved.
3 *
4 * This code is derived from software contributed to The DragonFly Project
5 * by Sepherosa Ziehau <sepherosa@gmail.com>
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 *
11 * 1. Redistributions of source code must retain the above copyright
12 * notice, this list of conditions and the following disclaimer.
13 * 2. Redistributions in binary form must reproduce the above copyright
14 * notice, this list of conditions and the following disclaimer in
15 * the documentation and/or other materials provided with the
16 * distribution.
17 * 3. Neither the name of The DragonFly Project nor the names of its
18 * contributors may be used to endorse or promote products derived
19 * from this software without specific, prior written permission.
20 *
21 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
22 * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
23 * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS
24 * FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE
25 * COPYRIGHT HOLDERS OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT,
26 * INCIDENTAL, SPECIAL, EXEMPLARY OR CONSEQUENTIAL DAMAGES (INCLUDING,
27 * BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
28 * LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED
29 * AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
30 * OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT
31 * OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
32 * SUCH DAMAGE.
33 *
34 * $DragonFly: src/sys/dev/netif/et/if_et.c,v 1.17 2008/09/17 08:51:29 sephe Exp $
35 */
36
37 #include <sys/param.h>
38 #include <sys/bitops.h>
39 #include <sys/endian.h>
40 #include <sys/kernel.h>
41 #include <sys/bus.h>
42 #include <sys/interrupt.h>
43 #include <sys/malloc.h>
44 #include <sys/proc.h>
45 #include <sys/rman.h>
46 #include <sys/serialize.h>
47 #include <sys/socket.h>
48 #include <sys/sockio.h>
49 #include <sys/sysctl.h>
50
51 #include <net/ethernet.h>
52 #include <net/if.h>
53 #include <net/bpf.h>
54 #include <net/if_arp.h>
55 #include <net/if_dl.h>
56 #include <net/if_media.h>
57 #include <net/ifq_var.h>
58 #include <net/vlan/if_vlan_var.h>
59
60 #include <dev/netif/mii_layer/miivar.h>
61
62 #include <bus/pci/pcireg.h>
63 #include <bus/pci/pcivar.h>
64 #include <bus/pci/pcidevs.h>
65
66 #include <dev/netif/et/if_etreg.h>
67 #include <dev/netif/et/if_etvar.h>
68
69 #include "miibus_if.h"
70
71 static int et_probe(device_t);
72 static int et_attach(device_t);
73 static int et_detach(device_t);
74 static int et_shutdown(device_t);
75
76 static int et_miibus_readreg(device_t, int, int);
77 static int et_miibus_writereg(device_t, int, int, int);
78 static void et_miibus_statchg(device_t);
79
80 static void et_init(void *);
81 static int et_ioctl(struct ifnet *, u_long, caddr_t, struct ucred *);
82 static void et_start(struct ifnet *);
83 static void et_watchdog(struct ifnet *);
84 static int et_ifmedia_upd(struct ifnet *);
85 static void et_ifmedia_sts(struct ifnet *, struct ifmediareq *);
86
87 static int et_sysctl_rx_intr_npkts(SYSCTL_HANDLER_ARGS);
88 static int et_sysctl_rx_intr_delay(SYSCTL_HANDLER_ARGS);
89
90 static void et_intr(void *);
91 static void et_enable_intrs(struct et_softc *, uint32_t);
92 static void et_disable_intrs(struct et_softc *);
93 static void et_rxeof(struct et_softc *);
94 static void et_txeof(struct et_softc *, int);
95
96 static int et_dma_alloc(device_t);
97 static void et_dma_free(device_t);
98 static void et_dma_mem_destroy(bus_dma_tag_t, void *, bus_dmamap_t);
99 static int et_dma_mbuf_create(device_t);
100 static void et_dma_mbuf_destroy(device_t, int, const int[]);
101 static int et_jumbo_mem_alloc(device_t);
102 static void et_jumbo_mem_free(device_t);
103 static int et_init_tx_ring(struct et_softc *);
104 static int et_init_rx_ring(struct et_softc *);
105 static void et_free_tx_ring(struct et_softc *);
106 static void et_free_rx_ring(struct et_softc *);
107 static int et_encap(struct et_softc *, struct mbuf **);
108 static struct et_jslot *
109 et_jalloc(struct et_jumbo_data *);
110 static void et_jfree(void *);
111 static void et_jref(void *);
112 static int et_newbuf(struct et_rxbuf_data *, int, int, int);
113 static int et_newbuf_cluster(struct et_rxbuf_data *, int, int);
114 static int et_newbuf_hdr(struct et_rxbuf_data *, int, int);
115 static int et_newbuf_jumbo(struct et_rxbuf_data *, int, int);
116
117 static void et_stop(struct et_softc *);
118 static int et_chip_init(struct et_softc *);
119 static void et_chip_attach(struct et_softc *);
120 static void et_init_mac(struct et_softc *);
121 static void et_init_rxmac(struct et_softc *);
122 static void et_init_txmac(struct et_softc *);
123 static int et_init_rxdma(struct et_softc *);
124 static int et_init_txdma(struct et_softc *);
125 static int et_start_rxdma(struct et_softc *);
126 static int et_start_txdma(struct et_softc *);
127 static int et_stop_rxdma(struct et_softc *);
128 static int et_stop_txdma(struct et_softc *);
129 static int et_enable_txrx(struct et_softc *, int);
130 static void et_reset(struct et_softc *);
131 static int et_bus_config(device_t);
132 static void et_get_eaddr(device_t, uint8_t[]);
133 static void et_setmulti(struct et_softc *);
134 static void et_tick(void *);
135 static void et_setmedia(struct et_softc *);
136 static void et_setup_rxdesc(struct et_rxbuf_data *, int, bus_addr_t);
137
138 static const struct et_dev {
139 uint16_t vid;
140 uint16_t did;
141 const char *desc;
142 } et_devices[] = {
143 { PCI_VENDOR_LUCENT, PCI_PRODUCT_LUCENT_ET1310,
144 "Agere ET1310 Gigabit Ethernet" },
145 { PCI_VENDOR_LUCENT, PCI_PRODUCT_LUCENT_ET1310_FAST,
146 "Agere ET1310 Fast Ethernet" },
147 { 0, 0, NULL }
148 };
149
150 static device_method_t et_methods[] = {
151 DEVMETHOD(device_probe, et_probe),
152 DEVMETHOD(device_attach, et_attach),
153 DEVMETHOD(device_detach, et_detach),
154 DEVMETHOD(device_shutdown, et_shutdown),
155 #if 0
156 DEVMETHOD(device_suspend, et_suspend),
157 DEVMETHOD(device_resume, et_resume),
158 #endif
159
160 DEVMETHOD(bus_print_child, bus_generic_print_child),
161 DEVMETHOD(bus_driver_added, bus_generic_driver_added),
162
163 DEVMETHOD(miibus_readreg, et_miibus_readreg),
164 DEVMETHOD(miibus_writereg, et_miibus_writereg),
165 DEVMETHOD(miibus_statchg, et_miibus_statchg),
166
167 { 0, 0 }
168 };
169
170 static driver_t et_driver = {
171 "et",
172 et_methods,
173 sizeof(struct et_softc)
174 };
175
176 static devclass_t et_devclass;
177
178 DECLARE_DUMMY_MODULE(if_et);
179 MODULE_DEPEND(if_et, miibus, 1, 1, 1);
180 DRIVER_MODULE(if_et, pci, et_driver, et_devclass, 0, 0);
181 DRIVER_MODULE(miibus, et, miibus_driver, miibus_devclass, 0, 0);
182
183 static int et_rx_intr_npkts = 129;
184 static int et_rx_intr_delay = 25; /* x4 usec */
185 static int et_tx_intr_nsegs = 256;
186 static uint32_t et_timer = 1000 * 1000 * 1000; /* nanosec */
187
188 TUNABLE_INT("hw.et.timer", &et_timer);
189 TUNABLE_INT("hw.et.rx_intr_npkts", &et_rx_intr_npkts);
190 TUNABLE_INT("hw.et.rx_intr_delay", &et_rx_intr_delay);
191 TUNABLE_INT("hw.et.tx_intr_nsegs", &et_tx_intr_nsegs);
192
193 struct et_bsize {
194 int bufsize;
195 int jumbo;
196 et_newbuf_t newbuf;
197 };
198
199 static const struct et_bsize et_bufsize_std[ET_RX_NRING] = {
200 { .bufsize = ET_RXDMA_CTRL_RING0_128, .jumbo = 0,
201 .newbuf = et_newbuf_hdr },
202 { .bufsize = ET_RXDMA_CTRL_RING1_2048, .jumbo = 0,
203 .newbuf = et_newbuf_cluster },
204 };
205
206 static const struct et_bsize et_bufsize_jumbo[ET_RX_NRING] = {
207 { .bufsize = ET_RXDMA_CTRL_RING0_128, .jumbo = 0,
208 .newbuf = et_newbuf_hdr },
209 { .bufsize = ET_RXDMA_CTRL_RING1_16384, .jumbo = 1,
210 .newbuf = et_newbuf_jumbo },
211 };
212
213 static int
214 et_probe(device_t dev)
215 {
216 const struct et_dev *d;
217 uint16_t did, vid;
218
219 vid = pci_get_vendor(dev);
220 did = pci_get_device(dev);
221
222 for (d = et_devices; d->desc != NULL; ++d) {
223 if (vid == d->vid && did == d->did) {
224 device_set_desc(dev, d->desc);
225 return 0;
226 }
227 }
228 return ENXIO;
229 }
230
231 static int
232 et_attach(device_t dev)
233 {
234 struct et_softc *sc = device_get_softc(dev);
235 struct ifnet *ifp = &sc->arpcom.ac_if;
236 uint8_t eaddr[ETHER_ADDR_LEN];
237 int error;
238
239 if_initname(ifp, device_get_name(dev), device_get_unit(dev));
240 callout_init(&sc->sc_tick);
241
242 /*
243 * Initialize tunables
244 */
245 sc->sc_rx_intr_npkts = et_rx_intr_npkts;
246 sc->sc_rx_intr_delay = et_rx_intr_delay;
247 sc->sc_tx_intr_nsegs = et_tx_intr_nsegs;
248 sc->sc_timer = et_timer;
249
250 #ifndef BURN_BRIDGES
251 if (pci_get_powerstate(dev) != PCI_POWERSTATE_D0) {
252 uint32_t irq, mem;
253
254 irq = pci_read_config(dev, PCIR_INTLINE, 4);
255 mem = pci_read_config(dev, ET_PCIR_BAR, 4);
256
257 device_printf(dev, "chip is in D%d power mode "
258 "-- setting to D0\n", pci_get_powerstate(dev));
259
260 pci_set_powerstate(dev, PCI_POWERSTATE_D0);
261
262 pci_write_config(dev, PCIR_INTLINE, irq, 4);
263 pci_write_config(dev, ET_PCIR_BAR, mem, 4);
264 }
265 #endif /* !BURN_BRIDGE */
266
267 /* Enable bus mastering */
268 pci_enable_busmaster(dev);
269
270 /*
271 * Allocate IO memory
272 */
273 sc->sc_mem_rid = ET_PCIR_BAR;
274 sc->sc_mem_res = bus_alloc_resource_any(dev, SYS_RES_MEMORY,
275 &sc->sc_mem_rid, RF_ACTIVE);
276 if (sc->sc_mem_res == NULL) {
277 device_printf(dev, "can't allocate IO memory\n");
278 return ENXIO;
279 }
280 sc->sc_mem_bt = rman_get_bustag(sc->sc_mem_res);
281 sc->sc_mem_bh = rman_get_bushandle(sc->sc_mem_res);
282
283 /*
284 * Allocate IRQ
285 */
286 sc->sc_irq_rid = 0;
287 sc->sc_irq_res = bus_alloc_resource_any(dev, SYS_RES_IRQ,
288 &sc->sc_irq_rid,
289 RF_SHAREABLE | RF_ACTIVE);
290 if (sc->sc_irq_res == NULL) {
291 device_printf(dev, "can't allocate irq\n");
292 error = ENXIO;
293 goto fail;
294 }
295
296 /*
297 * Create sysctl tree
298 */
299 sysctl_ctx_init(&sc->sc_sysctl_ctx);
300 sc->sc_sysctl_tree = SYSCTL_ADD_NODE(&sc->sc_sysctl_ctx,
301 SYSCTL_STATIC_CHILDREN(_hw),
302 OID_AUTO,
303 device_get_nameunit(dev),
304 CTLFLAG_RD, 0, "");
305 if (sc->sc_sysctl_tree == NULL) {
306 device_printf(dev, "can't add sysctl node\n");
307 error = ENXIO;
308 goto fail;
309 }
310
311 SYSCTL_ADD_PROC(&sc->sc_sysctl_ctx,
312 SYSCTL_CHILDREN(sc->sc_sysctl_tree),
313 OID_AUTO, "rx_intr_npkts", CTLTYPE_INT | CTLFLAG_RW,
314 sc, 0, et_sysctl_rx_intr_npkts, "I",
315 "RX IM, # packets per RX interrupt");
316 SYSCTL_ADD_PROC(&sc->sc_sysctl_ctx,
317 SYSCTL_CHILDREN(sc->sc_sysctl_tree),
318 OID_AUTO, "rx_intr_delay", CTLTYPE_INT | CTLFLAG_RW,
319 sc, 0, et_sysctl_rx_intr_delay, "I",
320 "RX IM, RX interrupt delay (x10 usec)");
321 SYSCTL_ADD_INT(&sc->sc_sysctl_ctx,
322 SYSCTL_CHILDREN(sc->sc_sysctl_tree), OID_AUTO,
323 "tx_intr_nsegs", CTLFLAG_RW, &sc->sc_tx_intr_nsegs, 0,
324 "TX IM, # segments per TX interrupt");
325 SYSCTL_ADD_UINT(&sc->sc_sysctl_ctx,
326 SYSCTL_CHILDREN(sc->sc_sysctl_tree), OID_AUTO,
327 "timer", CTLFLAG_RW, &sc->sc_timer, 0,
328 "TX timer");
329
330 error = et_bus_config(dev);
331 if (error)
332 goto fail;
333
334 et_get_eaddr(dev, eaddr);
335
336 CSR_WRITE_4(sc, ET_PM,
337 ET_PM_SYSCLK_GATE | ET_PM_TXCLK_GATE | ET_PM_RXCLK_GATE);
338
339 et_reset(sc);
340
341 et_disable_intrs(sc);
342
343 error = et_dma_alloc(dev);
344 if (error)
345 goto fail;
346
347 ifp->if_softc = sc;
348 ifp->if_flags = IFF_BROADCAST | IFF_SIMPLEX | IFF_MULTICAST;
349 ifp->if_init = et_init;
350 ifp->if_ioctl = et_ioctl;
351 ifp->if_start = et_start;
352 ifp->if_watchdog = et_watchdog;
353 ifp->if_mtu = ETHERMTU;
354 ifp->if_capabilities = IFCAP_VLAN_MTU;
355 ifp->if_capenable = ifp->if_capabilities;
356 ifq_set_maxlen(&ifp->if_snd, ET_TX_NDESC);
357 ifq_set_ready(&ifp->if_snd);
358
359 et_chip_attach(sc);
360
361 error = mii_phy_probe(dev, &sc->sc_miibus,
362 et_ifmedia_upd, et_ifmedia_sts);
363 if (error) {
364 device_printf(dev, "can't probe any PHY\n");
365 goto fail;
366 }
367
368 ether_ifattach(ifp, eaddr, NULL);
369
370 error = bus_setup_intr(dev, sc->sc_irq_res, INTR_MPSAFE, et_intr, sc,
371 &sc->sc_irq_handle, ifp->if_serializer);
372 if (error) {
373 ether_ifdetach(ifp);
374 device_printf(dev, "can't setup intr\n");
375 goto fail;
376 }
377
378 ifp->if_cpuid = ithread_cpuid(rman_get_start(sc->sc_irq_res));
379 KKASSERT(ifp->if_cpuid >= 0 && ifp->if_cpuid < ncpus);
380
381 return 0;
382 fail:
383 et_detach(dev);
384 return error;
385 }
386
387 static int
388 et_detach(device_t dev)
389 {
390 struct et_softc *sc = device_get_softc(dev);
391
392 if (device_is_attached(dev)) {
393 struct ifnet *ifp = &sc->arpcom.ac_if;
394
395 lwkt_serialize_enter(ifp->if_serializer);
396 et_stop(sc);
397 bus_teardown_intr(dev, sc->sc_irq_res, sc->sc_irq_handle);
398 lwkt_serialize_exit(ifp->if_serializer);
399
400 ether_ifdetach(ifp);
401 }
402
403 if (sc->sc_sysctl_tree != NULL)
404 sysctl_ctx_free(&sc->sc_sysctl_ctx);
405
406 if (sc->sc_miibus != NULL)
407 device_delete_child(dev, sc->sc_miibus);
408 bus_generic_detach(dev);
409
410 if (sc->sc_irq_res != NULL) {
411 bus_release_resource(dev, SYS_RES_IRQ, sc->sc_irq_rid,
412 sc->sc_irq_res);
413 }
414
415 if (sc->sc_mem_res != NULL) {
416 bus_release_resource(dev, SYS_RES_MEMORY, sc->sc_mem_rid,
417 sc->sc_mem_res);
418 }
419
420 et_dma_free(dev);
421
422 return 0;
423 }
424
425 static int
426 et_shutdown(device_t dev)
427 {
428 struct et_softc *sc = device_get_softc(dev);
429 struct ifnet *ifp = &sc->arpcom.ac_if;
430
431 lwkt_serialize_enter(ifp->if_serializer);
432 et_stop(sc);
433 lwkt_serialize_exit(ifp->if_serializer);
434 return 0;
435 }
436
437 static int
438 et_miibus_readreg(device_t dev, int phy, int reg)
439 {
440 struct et_softc *sc = device_get_softc(dev);
441 uint32_t val;
442 int i, ret;
443
444 /* Stop any pending operations */
445 CSR_WRITE_4(sc, ET_MII_CMD, 0);
446
447 val = __SHIFTIN(phy, ET_MII_ADDR_PHY) |
448 __SHIFTIN(reg, ET_MII_ADDR_REG);
449 CSR_WRITE_4(sc, ET_MII_ADDR, val);
450
451 /* Start reading */
452 CSR_WRITE_4(sc, ET_MII_CMD, ET_MII_CMD_READ);
453
454 #define NRETRY 50
455
456 for (i = 0; i < NRETRY; ++i) {
457 val = CSR_READ_4(sc, ET_MII_IND);
458 if ((val & (ET_MII_IND_BUSY | ET_MII_IND_INVALID)) == 0)
459 break;
460 DELAY(50);
461 }
462 if (i == NRETRY) {
463 if_printf(&sc->arpcom.ac_if,
464 "read phy %d, reg %d timed out\n", phy, reg);
465 ret = 0;
466 goto back;
467 }
468
469 #undef NRETRY
470
471 val = CSR_READ_4(sc, ET_MII_STAT);
472 ret = __SHIFTOUT(val, ET_MII_STAT_VALUE);
473
474 back:
475 /* Make sure that the current operation is stopped */
476 CSR_WRITE_4(sc, ET_MII_CMD, 0);
477 return ret;
478 }
479
480 static int
481 et_miibus_writereg(device_t dev, int phy, int reg, int val0)
482 {
483 struct et_softc *sc = device_get_softc(dev);
484 uint32_t val;
485 int i;
486
487 /* Stop any pending operations */
488 CSR_WRITE_4(sc, ET_MII_CMD, 0);
489
490 val = __SHIFTIN(phy, ET_MII_ADDR_PHY) |
491 __SHIFTIN(reg, ET_MII_ADDR_REG);
492 CSR_WRITE_4(sc, ET_MII_ADDR, val);
493
494 /* Start writing */
495 CSR_WRITE_4(sc, ET_MII_CTRL, __SHIFTIN(val0, ET_MII_CTRL_VALUE));
496
497 #define NRETRY 100
498
499 for (i = 0; i < NRETRY; ++i) {
500 val = CSR_READ_4(sc, ET_MII_IND);
501 if ((val & ET_MII_IND_BUSY) == 0)
502 break;
503 DELAY(50);
504 }
505 if (i == NRETRY) {
506 if_printf(&sc->arpcom.ac_if,
507 "write phy %d, reg %d timed out\n", phy, reg);
508 et_miibus_readreg(dev, phy, reg);
509 }
510
511 #undef NRETRY
512
513 /* Make sure that the current operation is stopped */
514 CSR_WRITE_4(sc, ET_MII_CMD, 0);
515 return 0;
516 }
517
518 static void
519 et_miibus_statchg(device_t dev)
520 {
521 et_setmedia(device_get_softc(dev));
522 }
523
524 static int
525 et_ifmedia_upd(struct ifnet *ifp)
526 {
527 struct et_softc *sc = ifp->if_softc;
528 struct mii_data *mii = device_get_softc(sc->sc_miibus);
529
530 if (mii->mii_instance != 0) {
531 struct mii_softc *miisc;
532
533 LIST_FOREACH(miisc, &mii->mii_phys, mii_list)
534 mii_phy_reset(miisc);
535 }
536 mii_mediachg(mii);
537
538 return 0;
539 }
540
541 static void
542 et_ifmedia_sts(struct ifnet *ifp, struct ifmediareq *ifmr)
543 {
544 struct et_softc *sc = ifp->if_softc;
545 struct mii_data *mii = device_get_softc(sc->sc_miibus);
546
547 mii_pollstat(mii);
548 ifmr->ifm_active = mii->mii_media_active;
549 ifmr->ifm_status = mii->mii_media_status;
550 }
551
552 static void
553 et_stop(struct et_softc *sc)
554 {
555 struct ifnet *ifp = &sc->arpcom.ac_if;
556
557 ASSERT_SERIALIZED(ifp->if_serializer);
558
559 callout_stop(&sc->sc_tick);
560
561 et_stop_rxdma(sc);
562 et_stop_txdma(sc);
563
564 et_disable_intrs(sc);
565
566 et_free_tx_ring(sc);
567 et_free_rx_ring(sc);
568
569 et_reset(sc);
570
571 sc->sc_tx = 0;
572 sc->sc_tx_intr = 0;
573 sc->sc_flags &= ~ET_FLAG_TXRX_ENABLED;
574
575 ifp->if_timer = 0;
576 ifp->if_flags &= ~(IFF_RUNNING | IFF_OACTIVE);
577 }
578
579 static int
580 et_bus_config(device_t dev)
581 {
582 uint32_t val, max_plsz;
583 uint16_t ack_latency, replay_timer;
584
585 /*
586 * Test whether EEPROM is valid
587 * NOTE: Read twice to get the correct value
588 */
589 pci_read_config(dev, ET_PCIR_EEPROM_STATUS, 1);
590 val = pci_read_config(dev, ET_PCIR_EEPROM_STATUS, 1);
591 if (val & ET_PCIM_EEPROM_STATUS_ERROR) {
592 device_printf(dev, "EEPROM status error 0x%02x\n", val);
593 return ENXIO;
594 }
595
596 /* TODO: LED */
597
598 /*
599 * Configure ACK latency and replay timer according to
600 * max playload size
601 */
602 val = pci_read_config(dev, ET_PCIR_DEVICE_CAPS, 4);
603 max_plsz = val & ET_PCIM_DEVICE_CAPS_MAX_PLSZ;
604
605 switch (max_plsz) {
606 case ET_PCIV_DEVICE_CAPS_PLSZ_128:
607 ack_latency = ET_PCIV_ACK_LATENCY_128;
608 replay_timer = ET_PCIV_REPLAY_TIMER_128;
609 break;
610
611 case ET_PCIV_DEVICE_CAPS_PLSZ_256:
612 ack_latency = ET_PCIV_ACK_LATENCY_256;
613 replay_timer = ET_PCIV_REPLAY_TIMER_256;
614 break;
615
616 default:
617 ack_latency = pci_read_config(dev, ET_PCIR_ACK_LATENCY, 2);
618 replay_timer = pci_read_config(dev, ET_PCIR_REPLAY_TIMER, 2);
619 device_printf(dev, "ack latency %u, replay timer %u\n",
620 ack_latency, replay_timer);
621 break;
622 }
623 if (ack_latency != 0) {
624 pci_write_config(dev, ET_PCIR_ACK_LATENCY, ack_latency, 2);
625 pci_write_config(dev, ET_PCIR_REPLAY_TIMER, replay_timer, 2);
626 }
627
628 /*
629 * Set L0s and L1 latency timer to 2us
630 */
631 val = ET_PCIV_L0S_LATENCY(2) | ET_PCIV_L1_LATENCY(2);
632 pci_write_config(dev, ET_PCIR_L0S_L1_LATENCY, val, 1);
633
634 /*
635 * Set max read request size to 2048 bytes
636 */
637 val = pci_read_config(dev, ET_PCIR_DEVICE_CTRL, 2);
638 val &= ~ET_PCIM_DEVICE_CTRL_MAX_RRSZ;
639 val |= ET_PCIV_DEVICE_CTRL_RRSZ_2K;
640 pci_write_config(dev, ET_PCIR_DEVICE_CTRL, val, 2);
641
642 return 0;
643 }
644
645 static void
646 et_get_eaddr(device_t dev, uint8_t eaddr[])
647 {
648 uint32_t val;
649 int i;
650
651 val = pci_read_config(dev, ET_PCIR_MAC_ADDR0, 4);
652 for (i = 0; i < 4; ++i)
653 eaddr[i] = (val >> (8 * i)) & 0xff;
654
655 val = pci_read_config(dev, ET_PCIR_MAC_ADDR1, 2);
656 for (; i < ETHER_ADDR_LEN; ++i)
657 eaddr[i] = (val >> (8 * (i - 4))) & 0xff;
658 }
659
660 static void
661 et_reset(struct et_softc *sc)
662 {
663 CSR_WRITE_4(sc, ET_MAC_CFG1,
664 ET_MAC_CFG1_RST_TXFUNC | ET_MAC_CFG1_RST_RXFUNC |
665 ET_MAC_CFG1_RST_TXMC | ET_MAC_CFG1_RST_RXMC |
666 ET_MAC_CFG1_SIM_RST | ET_MAC_CFG1_SOFT_RST);
667
668 CSR_WRITE_4(sc, ET_SWRST,
669 ET_SWRST_TXDMA | ET_SWRST_RXDMA |
670 ET_SWRST_TXMAC | ET_SWRST_RXMAC |
671 ET_SWRST_MAC | ET_SWRST_MAC_STAT | ET_SWRST_MMC);
672
673 CSR_WRITE_4(sc, ET_MAC_CFG1,
674 ET_MAC_CFG1_RST_TXFUNC | ET_MAC_CFG1_RST_RXFUNC |
675 ET_MAC_CFG1_RST_TXMC | ET_MAC_CFG1_RST_RXMC);
676 CSR_WRITE_4(sc, ET_MAC_CFG1, 0);
677 }
678
679 static void
680 et_disable_intrs(struct et_softc *sc)
681 {
682 CSR_WRITE_4(sc, ET_INTR_MASK, 0xffffffff);
683 }
684
685 static void
686 et_enable_intrs(struct et_softc *sc, uint32_t intrs)
687 {
688 CSR_WRITE_4(sc, ET_INTR_MASK, ~intrs);
689 }
690
691 static int
692 et_dma_alloc(device_t dev)
693 {
694 struct et_softc *sc = device_get_softc(dev);
695 struct et_txdesc_ring *tx_ring = &sc->sc_tx_ring;
696 struct et_txstatus_data *txsd = &sc->sc_tx_status;
697 struct et_rxstat_ring *rxst_ring = &sc->sc_rxstat_ring;
698 struct et_rxstatus_data *rxsd = &sc->sc_rx_status;
699 int i, error;
700
701 /*
702 * Create top level DMA tag
703 */
704 error = bus_dma_tag_create(NULL, 1, 0,
705 BUS_SPACE_MAXADDR,
706 BUS_SPACE_MAXADDR,
707 NULL, NULL,
708 BUS_SPACE_MAXSIZE_32BIT,
709 0,
710 BUS_SPACE_MAXSIZE_32BIT,
711 0, &sc->sc_dtag);
712 if (error) {
713 device_printf(dev, "can't create DMA tag\n");
714 return error;
715 }
716
717 /*
718 * Create TX ring DMA stuffs
719 */
720 tx_ring->tr_desc = bus_dmamem_coherent_any(sc->sc_dtag,
721 ET_ALIGN, ET_TX_RING_SIZE,
722 BUS_DMA_WAITOK | BUS_DMA_ZERO,
723 &tx_ring->tr_dtag, &tx_ring->tr_dmap,
724 &tx_ring->tr_paddr);
725 if (tx_ring->tr_desc == NULL) {
726 device_printf(dev, "can't create TX ring DMA stuffs\n");
727 return ENOMEM;
728 }
729
730 /*
731 * Create TX status DMA stuffs
732 */
733 txsd->txsd_status = bus_dmamem_coherent_any(sc->sc_dtag,
734 ET_ALIGN, sizeof(uint32_t),
735 BUS_DMA_WAITOK | BUS_DMA_ZERO,
736 &txsd->txsd_dtag, &txsd->txsd_dmap,
737 &txsd->txsd_paddr);
738 if (txsd->txsd_status == NULL) {
739 device_printf(dev, "can't create TX status DMA stuffs\n");
740 return ENOMEM;
741 }
742
743 /*
744 * Create DMA stuffs for RX rings
745 */
746 for (i = 0; i < ET_RX_NRING; ++i) {
747 static const uint32_t rx_ring_posreg[ET_RX_NRING] =
748 { ET_RX_RING0_POS, ET_RX_RING1_POS };
749
750 struct et_rxdesc_ring *rx_ring = &sc->sc_rx_ring[i];
751
752 rx_ring->rr_desc = bus_dmamem_coherent_any(sc->sc_dtag,
753 ET_ALIGN, ET_RX_RING_SIZE,
754 BUS_DMA_WAITOK | BUS_DMA_ZERO,
755 &rx_ring->rr_dtag, &rx_ring->rr_dmap,
756 &rx_ring->rr_paddr);
757 if (rx_ring->rr_desc == NULL) {
758 device_printf(dev, "can't create DMA stuffs for "
759 "the %d RX ring\n", i);
760 return ENOMEM;
761 }
762 rx_ring->rr_posreg = rx_ring_posreg[i];
763 }
764
765 /*
766 * Create RX stat ring DMA stuffs
767 */
768 rxst_ring->rsr_stat = bus_dmamem_coherent_any(sc->sc_dtag,
769 ET_ALIGN, ET_RXSTAT_RING_SIZE,
770 BUS_DMA_WAITOK | BUS_DMA_ZERO,
771 &rxst_ring->rsr_dtag, &rxst_ring->rsr_dmap,
772 &rxst_ring->rsr_paddr);
773 if (rxst_ring->rsr_stat == NULL) {
774 device_printf(dev, "can't create RX stat ring DMA stuffs\n");
775 return ENOMEM;
776 }
777
778 /*
779 * Create RX status DMA stuffs
780 */
781 rxsd->rxsd_status = bus_dmamem_coherent_any(sc->sc_dtag,
782 ET_ALIGN, sizeof(struct et_rxstatus),
783 BUS_DMA_WAITOK | BUS_DMA_ZERO,
784 &rxsd->rxsd_dtag, &rxsd->rxsd_dmap,
785 &rxsd->rxsd_paddr);
786 if (rxsd->rxsd_status == NULL) {
787 device_printf(dev, "can't create RX status DMA stuffs\n");
788 return ENOMEM;
789 }
790
791 /*
792 * Create mbuf DMA stuffs
793 */
794 error = et_dma_mbuf_create(dev);
795 if (error)
796 return error;
797
798 /*
799 * Create jumbo buffer DMA stuffs
800 * NOTE: Allow it to fail
801 */
802 if (et_jumbo_mem_alloc(dev) == 0)
803 sc->sc_flags |= ET_FLAG_JUMBO;
804
805 return 0;
806 }
807
808 static void
809 et_dma_free(device_t dev)
810 {
811 struct et_softc *sc = device_get_softc(dev);
812 struct et_txdesc_ring *tx_ring = &sc->sc_tx_ring;
813 struct et_txstatus_data *txsd = &sc->sc_tx_status;
814 struct et_rxstat_ring *rxst_ring = &sc->sc_rxstat_ring;
815 struct et_rxstatus_data *rxsd = &sc->sc_rx_status;
816 int i, rx_done[ET_RX_NRING];
817
818 /*
819 * Destroy TX ring DMA stuffs
820 */
821 et_dma_mem_destroy(tx_ring->tr_dtag, tx_ring->tr_desc,
822 tx_ring->tr_dmap);
823
824 /*
825 * Destroy TX status DMA stuffs
826 */
827 et_dma_mem_destroy(txsd->txsd_dtag, txsd->txsd_status,
828 txsd->txsd_dmap);
829
830 /*
831 * Destroy DMA stuffs for RX rings
832 */
833 for (i = 0; i < ET_RX_NRING; ++i) {
834 struct et_rxdesc_ring *rx_ring = &sc->sc_rx_ring[i];
835
836 et_dma_mem_destroy(rx_ring->rr_dtag, rx_ring->rr_desc,
837 rx_ring->rr_dmap);
838 }
839
840 /*
841 * Destroy RX stat ring DMA stuffs
842 */
843 et_dma_mem_destroy(rxst_ring->rsr_dtag, rxst_ring->rsr_stat,
844 rxst_ring->rsr_dmap);
845
846 /*
847 * Destroy RX status DMA stuffs
848 */
849 et_dma_mem_destroy(rxsd->rxsd_dtag, rxsd->rxsd_status,
850 rxsd->rxsd_dmap);
851
852 /*
853 * Destroy mbuf DMA stuffs
854 */
855 for (i = 0; i < ET_RX_NRING; ++i)
856 rx_done[i] = ET_RX_NDESC;
857 et_dma_mbuf_destroy(dev, ET_TX_NDESC, rx_done);
858
859 /*
860 * Destroy jumbo buffer DMA stuffs
861 */
862 if (sc->sc_flags & ET_FLAG_JUMBO)
863 et_jumbo_mem_free(dev);
864
865 /*
866 * Destroy top level DMA tag
867 */
868 if (sc->sc_dtag != NULL)
869 bus_dma_tag_destroy(sc->sc_dtag);
870 }
871
872 static int
873 et_dma_mbuf_create(device_t dev)
874 {
875 struct et_softc *sc = device_get_softc(dev);
876 struct et_txbuf_data *tbd = &sc->sc_tx_data;
877 int i, error, rx_done[ET_RX_NRING];
878
879 /*
880 * Create RX mbuf DMA tag
881 */
882 error = bus_dma_tag_create(sc->sc_dtag, 1, 0,
883 BUS_SPACE_MAXADDR, BUS_SPACE_MAXADDR,
884 NULL, NULL,
885 MCLBYTES, 1, MCLBYTES,
886 BUS_DMA_ALLOCNOW | BUS_DMA_WAITOK,
887 &sc->sc_rxbuf_dtag);
888 if (error) {
889 device_printf(dev, "can't create RX mbuf DMA tag\n");
890 return error;
891 }
892
893 /*
894 * Create spare DMA map for RX mbufs
895 */
896 error = bus_dmamap_create(sc->sc_rxbuf_dtag, BUS_DMA_WAITOK,
897 &sc->sc_rxbuf_tmp_dmap);
898 if (error) {
899 device_printf(dev, "can't create spare mbuf DMA map\n");
900 bus_dma_tag_destroy(sc->sc_rxbuf_dtag);
901 sc->sc_rxbuf_dtag = NULL;
902 return error;
903 }
904
905 /*
906 * Create DMA maps for RX mbufs
907 */
908 bzero(rx_done, sizeof(rx_done));
909 for (i = 0; i < ET_RX_NRING; ++i) {
910 struct et_rxbuf_data *rbd = &sc->sc_rx_data[i];
911 int j;
912
913 for (j = 0; j < ET_RX_NDESC; ++j) {
914 error = bus_dmamap_create(sc->sc_rxbuf_dtag,
915 BUS_DMA_WAITOK,
916 &rbd->rbd_buf[j].rb_dmap);
917 if (error) {
918 device_printf(dev, "can't create %d RX mbuf "
919 "for %d RX ring\n", j, i);
920 rx_done[i] = j;
921 et_dma_mbuf_destroy(dev, 0, rx_done);
922 return error;
923 }
924 }
925 rx_done[i] = ET_RX_NDESC;
926
927 rbd->rbd_softc = sc;
928 rbd->rbd_ring = &sc->sc_rx_ring[i];
929 }
930
931 /*
932 * Create TX mbuf DMA tag
933 */
934 error = bus_dma_tag_create(sc->sc_dtag, 1, 0,
935 BUS_SPACE_MAXADDR, BUS_SPACE_MAXADDR,
936 NULL, NULL,
937 ET_JUMBO_FRAMELEN, ET_NSEG_MAX, MCLBYTES,
938 BUS_DMA_ALLOCNOW | BUS_DMA_WAITOK |
939 BUS_DMA_ONEBPAGE,
940 &sc->sc_txbuf_dtag);
941 if (error) {
942 device_printf(dev, "can't create TX mbuf DMA tag\n");
943 return error;
944 }
945
946 /*
947 * Create DMA maps for TX mbufs
948 */
949 for (i = 0; i < ET_TX_NDESC; ++i) {
950 error = bus_dmamap_create(sc->sc_txbuf_dtag,
951 BUS_DMA_WAITOK | BUS_DMA_ONEBPAGE,
952 &tbd->tbd_buf[i].tb_dmap);
953 if (error) {
954 device_printf(dev, "can't create %d TX mbuf "
955 "DMA map\n", i);
956 et_dma_mbuf_destroy(dev, i, rx_done);
957 return error;
958 }
959 }
960
961 return 0;
962 }
963
964 static void
965 et_dma_mbuf_destroy(device_t dev, int tx_done, const int rx_done[])
966 {
967 struct et_softc *sc = device_get_softc(dev);
968 struct et_txbuf_data *tbd = &sc->sc_tx_data;
969 int i;
970
971 /*
972 * Destroy DMA tag and maps for RX mbufs
973 */
974 if (sc->sc_rxbuf_dtag) {
975 for (i = 0; i < ET_RX_NRING; ++i) {
976 struct et_rxbuf_data *rbd = &sc->sc_rx_data[i];
977 int j;
978
979 for (j = 0; j < rx_done[i]; ++j) {
980 struct et_rxbuf *rb = &rbd->rbd_buf[j];
981
982 KASSERT(rb->rb_mbuf == NULL,
983 ("RX mbuf in %d RX ring is "
984 "not freed yet\n", i));
985 bus_dmamap_destroy(sc->sc_rxbuf_dtag,
986 rb->rb_dmap);
987 }
988 }
989 bus_dmamap_destroy(sc->sc_rxbuf_dtag, sc->sc_rxbuf_tmp_dmap);
990 bus_dma_tag_destroy(sc->sc_rxbuf_dtag);
991 sc->sc_rxbuf_dtag = NULL;
992 }
993
994 /*
995 * Destroy DMA tag and maps for TX mbufs
996 */
997 if (sc->sc_txbuf_dtag) {
998 for (i = 0; i < tx_done; ++i) {
999 struct et_txbuf *tb = &tbd->tbd_buf[i];
1000
1001 KASSERT(tb->tb_mbuf == NULL,
1002 ("TX mbuf is not freed yet\n"));
1003 bus_dmamap_destroy(sc->sc_txbuf_dtag, tb->tb_dmap);
1004 }
1005 bus_dma_tag_destroy(sc->sc_txbuf_dtag);
1006 sc->sc_txbuf_dtag = NULL;
1007 }
1008 }
1009
1010 static void
1011 et_dma_mem_destroy(bus_dma_tag_t dtag, void *addr, bus_dmamap_t dmap)
1012 {
1013 if (dtag != NULL) {
1014 bus_dmamap_unload(dtag, dmap);
1015 bus_dmamem_free(dtag, addr, dmap);
1016 bus_dma_tag_destroy(dtag);
1017 }
1018 }
1019
1020 static void
1021 et_chip_attach(struct et_softc *sc)
1022 {
1023 uint32_t val;
1024
1025 /*
1026 * Perform minimal initialization
1027 */
1028
1029 /* Disable loopback */
1030 CSR_WRITE_4(sc, ET_LOOPBACK, 0);
1031
1032 /* Reset MAC */
1033 CSR_WRITE_4(sc, ET_MAC_CFG1,
1034 ET_MAC_CFG1_RST_TXFUNC | ET_MAC_CFG1_RST_RXFUNC |
1035 ET_MAC_CFG1_RST_TXMC | ET_MAC_CFG1_RST_RXMC |
1036 ET_MAC_CFG1_SIM_RST | ET_MAC_CFG1_SOFT_RST);
1037
1038 /*
1039 * Setup half duplex mode
1040 */
1041 val = __SHIFTIN(10, ET_MAC_HDX_ALT_BEB_TRUNC) |
1042 __SHIFTIN(15, ET_MAC_HDX_REXMIT_MAX) |
1043 __SHIFTIN(55, ET_MAC_HDX_COLLWIN) |
1044 ET_MAC_HDX_EXC_DEFER;
1045 CSR_WRITE_4(sc, ET_MAC_HDX, val);
1046
1047 /* Clear MAC control */
1048 CSR_WRITE_4(sc, ET_MAC_CTRL, 0);
1049
1050 /* Reset MII */
1051 CSR_WRITE_4(sc, ET_MII_CFG, ET_MII_CFG_CLKRST);
1052
1053 /* Bring MAC out of reset state */
1054 CSR_WRITE_4(sc, ET_MAC_CFG1, 0);
1055
1056 /* Enable memory controllers */
1057 CSR_WRITE_4(sc, ET_MMC_CTRL, ET_MMC_CTRL_ENABLE);
1058 }
1059
1060 static void
1061 et_intr(void *xsc)
1062 {
1063 struct et_softc *sc = xsc;
1064 struct ifnet *ifp = &sc->arpcom.ac_if;
1065 uint32_t intrs;
1066
1067 ASSERT_SERIALIZED(ifp->if_serializer);
1068
1069 if ((ifp->if_flags & IFF_RUNNING) == 0)
1070 return;
1071
1072 et_disable_intrs(sc);
1073
1074 intrs = CSR_READ_4(sc, ET_INTR_STATUS);
1075 intrs &= ET_INTRS;
1076 if (intrs == 0) /* Not interested */
1077 goto back;
1078
1079 if (intrs & ET_INTR_RXEOF)
1080 et_rxeof(sc);
1081 if (intrs & (ET_INTR_TXEOF | ET_INTR_TIMER))
1082 et_txeof(sc, 1);
1083 if (intrs & ET_INTR_TIMER)
1084 CSR_WRITE_4(sc, ET_TIMER, sc->sc_timer);
1085 back:
1086 et_enable_intrs(sc, ET_INTRS);
1087 }
1088
1089 static void
1090 et_init(void *xsc)
1091 {
1092 struct et_softc *sc = xsc;
1093 struct ifnet *ifp = &sc->arpcom.ac_if;
1094 const struct et_bsize *arr;
1095 int error, i;
1096
1097 ASSERT_SERIALIZED(ifp->if_serializer);
1098
1099 et_stop(sc);
1100
1101 arr = ET_FRAMELEN(ifp->if_mtu) < MCLBYTES ?
1102 et_bufsize_std : et_bufsize_jumbo;
1103 for (i = 0; i < ET_RX_NRING; ++i) {
1104 sc->sc_rx_data[i].rbd_bufsize = arr[i].bufsize;
1105 sc->sc_rx_data[i].rbd_newbuf = arr[i].newbuf;
1106 sc->sc_rx_data[i].rbd_jumbo = arr[i].jumbo;
1107 }
1108
1109 error = et_init_tx_ring(sc);
1110 if (error)
1111 goto back;
1112
1113 error = et_init_rx_ring(sc);
1114 if (error)
1115 goto back;
1116
1117 error = et_chip_init(sc);
1118 if (error)
1119 goto back;
1120
1121 error = et_enable_txrx(sc, 1);
1122 if (error)
1123 goto back;
1124
1125 et_enable_intrs(sc, ET_INTRS);
1126
1127 callout_reset(&sc->sc_tick, hz, et_tick, sc);
1128
1129 CSR_WRITE_4(sc, ET_TIMER, sc->sc_timer);
1130
1131 ifp->if_flags |= IFF_RUNNING;
1132 ifp->if_flags &= ~IFF_OACTIVE;
1133 back:
1134 if (error)
1135 et_stop(sc);
1136 }
1137
1138 static int
1139 et_ioctl(struct ifnet *ifp, u_long cmd, caddr_t data, struct ucred *cr)
1140 {
1141 struct et_softc *sc = ifp->if_softc;
1142 struct mii_data *mii = device_get_softc(sc->sc_miibus);
1143 struct ifreq *ifr = (struct ifreq *)data;
1144 int error = 0, max_framelen;
1145
1146 ASSERT_SERIALIZED(ifp->if_serializer);
1147
1148 switch (cmd) {
1149 case SIOCSIFFLAGS:
1150 if (ifp->if_flags & IFF_UP) {
1151 if (ifp->if_flags & IFF_RUNNING) {
1152 if ((ifp->if_flags ^ sc->sc_if_flags) &
1153 (IFF_ALLMULTI | IFF_PROMISC))
1154 et_setmulti(sc);
1155 } else {
1156 et_init(sc);
1157 }
1158 } else {
1159 if (ifp->if_flags & IFF_RUNNING)
1160 et_stop(sc);
1161 }
1162 sc->sc_if_flags = ifp->if_flags;
1163 break;
1164
1165 case SIOCSIFMEDIA:
1166 case SIOCGIFMEDIA:
1167 error = ifmedia_ioctl(ifp, ifr, &mii->mii_media, cmd);
1168 break;
1169
1170 case SIOCADDMULTI:
1171 case SIOCDELMULTI:
1172 if (ifp->if_flags & IFF_RUNNING)
1173 et_setmulti(sc);
1174 break;
1175
1176 case SIOCSIFMTU:
1177 if (sc->sc_flags & ET_FLAG_JUMBO)
1178 max_framelen = ET_JUMBO_FRAMELEN;
1179 else
1180 max_framelen = MCLBYTES - 1;
1181
1182 if (ET_FRAMELEN(ifr->ifr_mtu) > max_framelen) {
1183 error = EOPNOTSUPP;
1184 break;
1185 }
1186
1187 ifp->if_mtu = ifr->ifr_mtu;
1188 if (ifp->if_flags & IFF_RUNNING)
1189 et_init(sc);
1190 break;
1191
1192 default:
1193 error = ether_ioctl(ifp, cmd, data);
1194 break;
1195 }
1196 return error;
1197 }
1198
1199 static void
1200 et_start(struct ifnet *ifp)
1201 {
1202 struct et_softc *sc = ifp->if_softc;
1203 struct et_txbuf_data *tbd = &sc->sc_tx_data;
1204 int trans, oactive;
1205
1206 ASSERT_SERIALIZED(ifp->if_serializer);
1207
1208 if ((sc->sc_flags & ET_FLAG_TXRX_ENABLED) == 0) {
1209 ifq_purge(&ifp->if_snd);
1210 return;
1211 }
1212
1213 if ((ifp->if_flags & (IFF_RUNNING | IFF_OACTIVE)) != IFF_RUNNING)
1214 return;
1215
1216 oactive = 0;
1217 trans = 0;
1218 for (;;) {
1219 struct mbuf *m;
1220 int error;
1221
1222 if ((tbd->tbd_used + ET_NSEG_SPARE) > ET_TX_NDESC) {
1223 if (oactive) {
1224 ifp->if_flags |= IFF_OACTIVE;
1225 break;
1226 }
1227
1228 et_txeof(sc, 0);
1229 oactive = 1;
1230 continue;
1231 }
1232
1233 m = ifq_dequeue(&ifp->if_snd, NULL);
1234 if (m == NULL)
1235 break;
1236
1237 error = et_encap(sc, &m);
1238 if (error) {
1239 ifp->if_oerrors++;
1240 KKASSERT(m == NULL);
1241
1242 if (error == EFBIG) {
1243 /*
1244 * Excessive fragmented packets
1245 */
1246 if (oactive) {
1247 ifp->if_flags |= IFF_OACTIVE;
1248 break;
1249 }
1250 et_txeof(sc, 0);
1251 oactive = 1;
1252 }
1253 continue;
1254 } else {
1255 oactive = 0;
1256 }
1257 trans = 1;
1258
1259 BPF_MTAP(ifp, m);
1260 }
1261
1262 if (trans)
1263 ifp->if_timer = 5;
1264 }
1265
1266 static void
1267 et_watchdog(struct ifnet *ifp)
1268 {
1269 ASSERT_SERIALIZED(ifp->if_serializer);
1270
1271 if_printf(ifp, "watchdog timed out\n");
1272
1273 ifp->if_init(ifp->if_softc);
1274 if_devstart(ifp);
1275 }
1276
1277 static int
1278 et_stop_rxdma(struct et_softc *sc)
1279 {
1280 CSR_WRITE_4(sc, ET_RXDMA_CTRL,
1281 ET_RXDMA_CTRL_HALT | ET_RXDMA_CTRL_RING1_ENABLE);
1282
1283 DELAY(5);
1284 if ((CSR_READ_4(sc, ET_RXDMA_CTRL) & ET_RXDMA_CTRL_HALTED) == 0) {
1285 if_printf(&sc->arpcom.ac_if, "can't stop RX DMA engine\n");
1286 return ETIMEDOUT;
1287 }
1288 return 0;
1289 }
1290
1291 static int
1292 et_stop_txdma(struct et_softc *sc)
1293 {
1294 CSR_WRITE_4(sc, ET_TXDMA_CTRL,
1295 ET_TXDMA_CTRL_HALT | ET_TXDMA_CTRL_SINGLE_EPKT);
1296 return 0;
1297 }
1298
1299 static void
1300 et_free_tx_ring(struct et_softc *sc)
1301 {
1302 struct et_txbuf_data *tbd = &sc->sc_tx_data;
1303 struct et_txdesc_ring *tx_ring = &sc->sc_tx_ring;
1304 int i;
1305
1306 for (i = 0; i < ET_TX_NDESC; ++i) {
1307 struct et_txbuf *tb = &tbd->tbd_buf[i];
1308
1309 if (tb->tb_mbuf != NULL) {
1310 bus_dmamap_unload(sc->sc_txbuf_dtag, tb->tb_dmap);
1311 m_freem(tb->tb_mbuf);
1312 tb->tb_mbuf = NULL;
1313 }
1314 }
1315 bzero(tx_ring->tr_desc, ET_TX_RING_SIZE);
1316 }
1317
1318 static void
1319 et_free_rx_ring(struct et_softc *sc)
1320 {
1321 int n;
1322
1323 for (n = 0; n < ET_RX_NRING; ++n) {
1324 struct et_rxbuf_data *rbd = &sc->sc_rx_data[n];
1325 struct et_rxdesc_ring *rx_ring = &sc->sc_rx_ring[n];
1326 int i;
1327
1328 for (i = 0; i < ET_RX_NDESC; ++i) {
1329 struct et_rxbuf *rb = &rbd->rbd_buf[i];
1330
1331 if (rb->rb_mbuf != NULL) {
1332 if (!rbd->rbd_jumbo) {
1333 bus_dmamap_unload(sc->sc_rxbuf_dtag,
1334 rb->rb_dmap);
1335 }
1336 m_freem(rb->rb_mbuf);
1337 rb->rb_mbuf = NULL;
1338 }
1339 }
1340 bzero(rx_ring->rr_desc, ET_RX_RING_SIZE);
1341 }
1342 }
1343
1344 static void
1345 et_setmulti(struct et_softc *sc)
1346 {
1347 struct ifnet *ifp = &sc->arpcom.ac_if;
1348 uint32_t hash[4] = { 0, 0, 0, 0 };
1349 uint32_t rxmac_ctrl, pktfilt;
1350 struct ifmultiaddr *ifma;
1351 int i, count;
1352
1353 pktfilt = CSR_READ_4(sc, ET_PKTFILT);
1354 rxmac_ctrl = CSR_READ_4(sc, ET_RXMAC_CTRL);
1355
1356 pktfilt &= ~(ET_PKTFILT_BCAST | ET_PKTFILT_MCAST | ET_PKTFILT_UCAST);
1357 if (ifp->if_flags & (IFF_PROMISC | IFF_ALLMULTI)) {
1358 rxmac_ctrl |= ET_RXMAC_CTRL_NO_PKTFILT;
1359 goto back;
1360 }
1361
1362 count = 0;
1363 LIST_FOREACH(ifma, &ifp->if_multiaddrs, ifma_link) {
1364 uint32_t *hp, h;
1365
1366 if (ifma->ifma_addr->sa_family != AF_LINK)
1367 continue;
1368
1369 h = ether_crc32_be(LLADDR((struct sockaddr_dl *)
1370 ifma->ifma_addr), ETHER_ADDR_LEN);
1371 h = (h & 0x3f800000) >> 23;
1372
1373 hp = &hash[0];
1374 if (h >= 32 && h < 64) {
1375 h -= 32;
1376 hp = &hash[1];
1377 } else if (h >= 64 && h < 96) {
1378 h -= 64;
1379 hp = &hash[2];
1380 } else if (h >= 96) {
1381 h -= 96;
1382 hp = &hash[3];
1383 }
1384 *hp |= (1 << h);
1385
1386 ++count;
1387 }
1388
1389 for (i = 0; i < 4; ++i)
1390 CSR_WRITE_4(sc, ET_MULTI_HASH + (i * 4), hash[i]);
1391
1392 if (count > 0)
1393 pktfilt |= ET_PKTFILT_MCAST;
1394 rxmac_ctrl &= ~ET_RXMAC_CTRL_NO_PKTFILT;
1395 back:
1396 CSR_WRITE_4(sc, ET_PKTFILT, pktfilt);
1397 CSR_WRITE_4(sc, ET_RXMAC_CTRL, rxmac_ctrl);
1398 }
1399
1400 static int
1401 et_chip_init(struct et_softc *sc)
1402 {
1403 struct ifnet *ifp = &sc->arpcom.ac_if;
1404 uint32_t rxq_end;
1405 int error, frame_len, rxmem_size;
1406
1407 /*
1408 * Split 16Kbytes internal memory between TX and RX
1409 * according to frame length.
1410 */
1411 frame_len = ET_FRAMELEN(ifp->if_mtu);
1412 if (frame_len < 2048) {
1413 rxmem_size = ET_MEM_RXSIZE_DEFAULT;
1414 } else if (frame_len <= ET_RXMAC_CUT_THRU_FRMLEN) {
1415 rxmem_size = ET_MEM_SIZE / 2;
1416 } else {
1417 rxmem_size = ET_MEM_SIZE -
1418 roundup(frame_len + ET_MEM_TXSIZE_EX, ET_MEM_UNIT);
1419 }
1420 rxq_end = ET_QUEUE_ADDR(rxmem_size);
1421
1422 CSR_WRITE_4(sc, ET_RXQUEUE_START, ET_QUEUE_ADDR_START);
1423 CSR_WRITE_4(sc, ET_RXQUEUE_END, rxq_end);
1424 CSR_WRITE_4(sc, ET_TXQUEUE_START, rxq_end + 1);
1425 CSR_WRITE_4(sc, ET_TXQUEUE_END, ET_QUEUE_ADDR_END);
1426
1427 /* No loopback */
1428 CSR_WRITE_4(sc, ET_LOOPBACK, 0);
1429
1430 /* Clear MSI configure */
1431 CSR_WRITE_4(sc, ET_MSI_CFG, 0);
1432
1433 /* Disable timer */
1434 CSR_WRITE_4(sc, ET_TIMER, 0);
1435
1436 /* Initialize MAC */
1437 et_init_mac(sc);
1438
1439 /* Enable memory controllers */
1440 CSR_WRITE_4(sc, ET_MMC_CTRL, ET_MMC_CTRL_ENABLE);
1441
1442 /* Initialize RX MAC */
1443 et_init_rxmac(sc);
1444
1445 /* Initialize TX MAC */
1446 et_init_txmac(sc);
1447
1448 /* Initialize RX DMA engine */
1449 error = et_init_rxdma(sc);
1450 if (error)
1451 return error;
1452
1453 /* Initialize TX DMA engine */
1454 error = et_init_txdma(sc);
1455 if (error)
1456 return error;
1457
1458 return 0;
1459 }
1460
1461 static int
1462 et_init_tx_ring(struct et_softc *sc)
1463 {
1464 struct et_txdesc_ring *tx_ring = &sc->sc_tx_ring;
1465 struct et_txstatus_data *txsd = &sc->sc_tx_status;
1466 struct et_txbuf_data *tbd = &sc->sc_tx_data;
1467
1468 bzero(tx_ring->tr_desc, ET_TX_RING_SIZE);
1469
1470 tbd->tbd_start_index = 0;
1471 tbd->tbd_start_wrap = 0;
1472 tbd->tbd_used = 0;
1473
1474 bzero(txsd->txsd_status, sizeof(uint32_t));
1475
1476 return 0;
1477 }
1478
1479 static int
1480 et_init_rx_ring(struct et_softc *sc)
1481 {
1482 struct et_rxstatus_data *rxsd = &sc->sc_rx_status;
1483 struct et_rxstat_ring *rxst_ring = &sc->sc_rxstat_ring;
1484 int n;
1485
1486 for (n = 0; n < ET_RX_NRING; ++n) {
1487 struct et_rxbuf_data *rbd = &sc->sc_rx_data[n];
1488 int i, error;
1489
1490 for (i = 0; i < ET_RX_NDESC; ++i) {
1491 error = rbd->rbd_newbuf(rbd, i, 1);
1492 if (error) {
1493 if_printf(&sc->arpcom.ac_if, "%d ring %d buf, "
1494 "newbuf failed: %d\n", n, i, error);
1495 return error;
1496 }
1497 }
1498 }
1499
1500 bzero(rxsd->rxsd_status, sizeof(struct et_rxstatus));
1501 bzero(rxst_ring->rsr_stat, ET_RXSTAT_RING_SIZE);
1502
1503 return 0;
1504 }
1505
1506 static int
1507 et_init_rxdma(struct et_softc *sc)
1508 {
1509 struct et_rxstatus_data *rxsd = &sc->sc_rx_status;
1510 struct et_rxstat_ring *rxst_ring = &sc->sc_rxstat_ring;
1511 struct et_rxdesc_ring *rx_ring;
1512 int error;
1513
1514 error = et_stop_rxdma(sc);
1515 if (error) {
1516 if_printf(&sc->arpcom.ac_if, "can't init RX DMA engine\n");
1517 return error;
1518 }
1519
1520 /*
1521 * Install RX status
1522 */
1523 CSR_WRITE_4(sc, ET_RX_STATUS_HI, ET_ADDR_HI(rxsd->rxsd_paddr));
1524 CSR_WRITE_4(sc, ET_RX_STATUS_LO, ET_ADDR_LO(rxsd->rxsd_paddr));
1525
1526 /*
1527 * Install RX stat ring
1528 */
1529 CSR_WRITE_4(sc, ET_RXSTAT_HI, ET_ADDR_HI(rxst_ring->rsr_paddr));
1530 CSR_WRITE_4(sc, ET_RXSTAT_LO, ET_ADDR_LO(rxst_ring->rsr_paddr));
1531 CSR_WRITE_4(sc, ET_RXSTAT_CNT, ET_RX_NSTAT - 1);
1532 CSR_WRITE_4(sc, ET_RXSTAT_POS, 0);
1533 CSR_WRITE_4(sc, ET_RXSTAT_MINCNT, ((ET_RX_NSTAT * 15) / 100) - 1);
1534
1535 /* Match ET_RXSTAT_POS */
1536 rxst_ring->rsr_index = 0;
1537 rxst_ring->rsr_wrap = 0;
1538
1539 /*
1540 * Install the 2nd RX descriptor ring
1541 */
1542 rx_ring = &sc->sc_rx_ring[1];
1543 CSR_WRITE_4(sc, ET_RX_RING1_HI, ET_ADDR_HI(rx_ring->rr_paddr));
1544 CSR_WRITE_4(sc, ET_RX_RING1_LO, ET_ADDR_LO(rx_ring->rr_paddr));
1545 CSR_WRITE_4(sc, ET_RX_RING1_CNT, ET_RX_NDESC - 1);
1546 CSR_WRITE_4(sc, ET_RX_RING1_POS, ET_RX_RING1_POS_WRAP);
1547 CSR_WRITE_4(sc, ET_RX_RING1_MINCNT, ((ET_RX_NDESC * 15) / 100) - 1);
1548
1549 /* Match ET_RX_RING1_POS */
1550 rx_ring->rr_index = 0;
1551 rx_ring->rr_wrap = 1;
1552
1553 /*
1554 * Install the 1st RX descriptor ring
1555 */
1556 rx_ring = &sc->sc_rx_ring[0];
1557 CSR_WRITE_4(sc, ET_RX_RING0_HI, ET_ADDR_HI(rx_ring->rr_paddr));
1558 CSR_WRITE_4(sc, ET_RX_RING0_LO, ET_ADDR_LO(rx_ring->rr_paddr));
1559 CSR_WRITE_4(sc, ET_RX_RING0_CNT, ET_RX_NDESC - 1);
1560 CSR_WRITE_4(sc, ET_RX_RING0_POS, ET_RX_RING0_POS_WRAP);
1561 CSR_WRITE_4(sc, ET_RX_RING0_MINCNT, ((ET_RX_NDESC * 15) / 100) - 1);
1562
1563 /* Match ET_RX_RING0_POS */
1564 rx_ring->rr_index = 0;
1565 rx_ring->rr_wrap = 1;
1566
1567 /*
1568 * RX intr moderation
1569 */
1570 CSR_WRITE_4(sc, ET_RX_INTR_NPKTS, sc->sc_rx_intr_npkts);
1571 CSR_WRITE_4(sc, ET_RX_INTR_DELAY, sc->sc_rx_intr_delay);
1572
1573 return 0;
1574 }
1575
1576 static int
1577 et_init_txdma(struct et_softc *sc)
1578 {
1579 struct et_txdesc_ring *tx_ring = &sc->sc_tx_ring;
1580 struct et_txstatus_data *txsd = &sc->sc_tx_status;
1581 int error;
1582
1583 error = et_stop_txdma(sc);
1584 if (error) {
1585 if_printf(&sc->arpcom.ac_if, "can't init TX DMA engine\n");
1586 return error;
1587 }
1588
1589 /*
1590 * Install TX descriptor ring
1591 */
1592 CSR_WRITE_4(sc, ET_TX_RING_HI, ET_ADDR_HI(tx_ring->tr_paddr));
1593 CSR_WRITE_4(sc, ET_TX_RING_LO, ET_ADDR_LO(tx_ring->tr_paddr));
1594 CSR_WRITE_4(sc, ET_TX_RING_CNT, ET_TX_NDESC - 1);
1595
1596 /*
1597 * Install TX status
1598 */
1599 CSR_WRITE_4(sc, ET_TX_STATUS_HI, ET_ADDR_HI(txsd->txsd_paddr));
1600 CSR_WRITE_4(sc, ET_TX_STATUS_LO, ET_ADDR_LO(txsd->txsd_paddr));
1601
1602 CSR_WRITE_4(sc, ET_TX_READY_POS, 0);
1603
1604 /* Match ET_TX_READY_POS */
1605 tx_ring->tr_ready_index = 0;
1606 tx_ring->tr_ready_wrap = 0;
1607
1608 return 0;
1609 }
1610
1611 static void
1612 et_init_mac(struct et_softc *sc)
1613 {
1614 struct ifnet *ifp = &sc->arpcom.ac_if;
1615 const uint8_t *eaddr = IF_LLADDR(ifp);
1616 uint32_t val;
1617
1618 /* Reset MAC */
1619 CSR_WRITE_4(sc, ET_MAC_CFG1,
1620 ET_MAC_CFG1_RST_TXFUNC | ET_MAC_CFG1_RST_RXFUNC |
1621 ET_MAC_CFG1_RST_TXMC | ET_MAC_CFG1_RST_RXMC |
1622 ET_MAC_CFG1_SIM_RST | ET_MAC_CFG1_SOFT_RST);
1623
1624 /*
1625 * Setup inter packet gap
1626 */
1627 val = __SHIFTIN(56, ET_IPG_NONB2B_1) |
1628 __SHIFTIN(88, ET_IPG_NONB2B_2) |
1629 __SHIFTIN(80, ET_IPG_MINIFG) |
1630 __SHIFTIN(96, ET_IPG_B2B);
1631 CSR_WRITE_4(sc, ET_IPG, val);
1632
1633 /*
1634 * Setup half duplex mode
1635 */
1636 val = __SHIFTIN(10, ET_MAC_HDX_ALT_BEB_TRUNC) |
1637 __SHIFTIN(15, ET_MAC_HDX_REXMIT_MAX) |
1638 __SHIFTIN(55, ET_MAC_HDX_COLLWIN) |
1639 ET_MAC_HDX_EXC_DEFER;
1640 CSR_WRITE_4(sc, ET_MAC_HDX, val);
1641
1642 /* Clear MAC control */
1643 CSR_WRITE_4(sc, ET_MAC_CTRL, 0);
1644
1645 /* Reset MII */
1646 CSR_WRITE_4(sc, ET_MII_CFG, ET_MII_CFG_CLKRST);
1647
1648 /*
1649 * Set MAC address
1650 */
1651 val = eaddr[2] | (eaddr[3] << 8) | (eaddr[4] << 16) | (eaddr[5] << 24);
1652 CSR_WRITE_4(sc, ET_MAC_ADDR1, val);
1653 val = (eaddr[0] << 16) | (eaddr[1] << 24);
1654 CSR_WRITE_4(sc, ET_MAC_ADDR2, val);
1655
1656 /* Set max frame length */
1657 CSR_WRITE_4(sc, ET_MAX_FRMLEN, ET_FRAMELEN(ifp->if_mtu));
1658
1659 /* Bring MAC out of reset state */
1660 CSR_WRITE_4(sc, ET_MAC_CFG1, 0);
1661 }
1662
1663 static void
1664 et_init_rxmac(struct et_softc *sc)
1665 {
1666 struct ifnet *ifp = &sc->arpcom.ac_if;
1667 const uint8_t *eaddr = IF_LLADDR(ifp);
1668 uint32_t val;
1669 int i;
1670
1671 /* Disable RX MAC and WOL */
1672 CSR_WRITE_4(sc, ET_RXMAC_CTRL, ET_RXMAC_CTRL_WOL_DISABLE);
1673
1674 /*
1675 * Clear all WOL related registers
1676 */
1677 for (i = 0; i < 3; ++i)
1678 CSR_WRITE_4(sc, ET_WOL_CRC + (i * 4), 0);
1679 for (i = 0; i < 20; ++i)
1680 CSR_WRITE_4(sc, ET_WOL_MASK + (i * 4), 0);
1681
1682 /*
1683 * Set WOL source address. XXX is this necessary?
1684 */
1685 val = (eaddr[2] << 24) | (eaddr[3] << 16) | (eaddr[4] << 8) | eaddr[5];
1686 CSR_WRITE_4(sc, ET_WOL_SA_LO, val);
1687 val = (eaddr[0] << 8) | eaddr[1];
1688 CSR_WRITE_4(sc, ET_WOL_SA_HI, val);
1689
1690 /* Clear packet filters */
1691 CSR_WRITE_4(sc, ET_PKTFILT, 0);
1692
1693 /* No ucast filtering */
1694 CSR_WRITE_4(sc, ET_UCAST_FILTADDR1, 0);
1695 CSR_WRITE_4(sc, ET_UCAST_FILTADDR2, 0);
1696 CSR_WRITE_4(sc, ET_UCAST_FILTADDR3, 0);
1697
1698 if (ET_FRAMELEN(ifp->if_mtu) > ET_RXMAC_CUT_THRU_FRMLEN) {
1699 /*
1700 * In order to transmit jumbo packets greater than
1701 * ET_RXMAC_CUT_THRU_FRMLEN bytes, the FIFO between
1702 * RX MAC and RX DMA needs to be reduced in size to
1703 * (ET_MEM_SIZE - ET_MEM_TXSIZE_EX - framelen). In
1704 * order to implement this, we must use "cut through"
1705 * mode in the RX MAC, which chops packets down into
1706 * segments. In this case we selected 256 bytes,
1707 * since this is the size of the PCI-Express TLP's
1708 * that the ET1310 uses.
1709 */
1710 val = __SHIFTIN(ET_RXMAC_SEGSZ(256), ET_RXMAC_MC_SEGSZ_MAX) |
1711 ET_RXMAC_MC_SEGSZ_ENABLE;
1712 } else {
1713 val = 0;
1714 }
1715 CSR_WRITE_4(sc, ET_RXMAC_MC_SEGSZ, val);
1716
1717 CSR_WRITE_4(sc, ET_RXMAC_MC_WATERMARK, 0);
1718
1719 /* Initialize RX MAC management register */
1720 CSR_WRITE_4(sc, ET_RXMAC_MGT, 0);
1721
1722 CSR_WRITE_4(sc, ET_RXMAC_SPACE_AVL, 0);
1723
1724 CSR_WRITE_4(sc, ET_RXMAC_MGT,
1725 ET_RXMAC_MGT_PASS_ECRC |
1726 ET_RXMAC_MGT_PASS_ELEN |
1727 ET_RXMAC_MGT_PASS_ETRUNC |
1728 ET_RXMAC_MGT_CHECK_PKT);
1729
1730 /*
1731 * Configure runt filtering (may not work on certain chip generation)
1732 */
1733 val = __SHIFTIN(ETHER_MIN_LEN, ET_PKTFILT_MINLEN) | ET_PKTFILT_FRAG;
1734 CSR_WRITE_4(sc, ET_PKTFILT, val);
1735
1736 /* Enable RX MAC but leave WOL disabled */
1737 CSR_WRITE_4(sc, ET_RXMAC_CTRL,
1738 ET_RXMAC_CTRL_WOL_DISABLE | ET_RXMAC_CTRL_ENABLE);
1739
1740 /*
1741 * Setup multicast hash and allmulti/promisc mode
1742 */
1743 et_setmulti(sc);
1744 }
1745
1746 static void
1747 et_init_txmac(struct et_softc *sc)
1748 {
1749 /* Disable TX MAC and FC(?) */
1750 CSR_WRITE_4(sc, ET_TXMAC_CTRL, ET_TXMAC_CTRL_FC_DISABLE);
1751
1752 /* No flow control yet */
1753 CSR_WRITE_4(sc, ET_TXMAC_FLOWCTRL, 0);
1754
1755 /* Enable TX MAC but leave FC(?) diabled */
1756 CSR_WRITE_4(sc, ET_TXMAC_CTRL,
1757 ET_TXMAC_CTRL_ENABLE | ET_TXMAC_CTRL_FC_DISABLE);
1758 }
1759
1760 static int
1761 et_start_rxdma(struct et_softc *sc)
1762 {
1763 uint32_t val = 0;
1764
1765 val |= __SHIFTIN(sc->sc_rx_data[0].rbd_bufsize,
1766 ET_RXDMA_CTRL_RING0_SIZE) |
1767 ET_RXDMA_CTRL_RING0_ENABLE;
1768 val |= __SHIFTIN(sc->sc_rx_data[1].rbd_bufsize,
1769 ET_RXDMA_CTRL_RING1_SIZE) |
1770 ET_RXDMA_CTRL_RING1_ENABLE;
1771
1772 CSR_WRITE_4(sc, ET_RXDMA_CTRL, val);
1773
1774 DELAY(5);
1775
1776 if (CSR_READ_4(sc, ET_RXDMA_CTRL) & ET_RXDMA_CTRL_HALTED) {
1777 if_printf(&sc->arpcom.ac_if, "can't start RX DMA engine\n");
1778 return ETIMEDOUT;
1779 }
1780 return 0;
1781 }
1782
1783 static int
1784 et_start_txdma(struct et_softc *sc)
1785 {
1786 CSR_WRITE_4(sc, ET_TXDMA_CTRL, ET_TXDMA_CTRL_SINGLE_EPKT);
1787 return 0;
1788 }
1789
1790 static int
1791 et_enable_txrx(struct et_softc *sc, int media_upd)
1792 {
1793 struct ifnet *ifp = &sc->arpcom.ac_if;
1794 uint32_t val;
1795 int i, error;
1796
1797 val = CSR_READ_4(sc, ET_MAC_CFG1);
1798 val |= ET_MAC_CFG1_TXEN | ET_MAC_CFG1_RXEN;
1799 val &= ~(ET_MAC_CFG1_TXFLOW | ET_MAC_CFG1_RXFLOW |
1800 ET_MAC_CFG1_LOOPBACK);
1801 CSR_WRITE_4(sc, ET_MAC_CFG1, val);
1802
1803 if (media_upd)
1804 et_ifmedia_upd(ifp);
1805 else
1806 et_setmedia(sc);
1807
1808 #define NRETRY 100
1809
1810 for (i = 0; i < NRETRY; ++i) {
1811 val = CSR_READ_4(sc, ET_MAC_CFG1);
1812 if ((val & (ET_MAC_CFG1_SYNC_TXEN | ET_MAC_CFG1_SYNC_RXEN)) ==
1813 (ET_MAC_CFG1_SYNC_TXEN | ET_MAC_CFG1_SYNC_RXEN))
1814 break;
1815
1816 DELAY(10);
1817 }
1818 if (i == NRETRY) {
1819 if_printf(ifp, "can't enable RX/TX\n");
1820 return 0;
1821 }
1822 sc->sc_flags |= ET_FLAG_TXRX_ENABLED;
1823
1824 #undef NRETRY
1825
1826 /*
1827 * Start TX/RX DMA engine
1828 */
1829 error = et_start_rxdma(sc);
1830 if (error)
1831 return error;
1832
1833 error = et_start_txdma(sc);
1834 if (error)
1835 return error;
1836
1837 return 0;
1838 }
1839
1840 static void
1841 et_rxeof(struct et_softc *sc)
1842 {
1843 struct ifnet *ifp = &sc->arpcom.ac_if;
1844 struct et_rxstatus_data *rxsd = &sc->sc_rx_status;
1845 struct et_rxstat_ring *rxst_ring = &sc->sc_rxstat_ring;
1846 uint32_t rxs_stat_ring;
1847 int rxst_wrap, rxst_index;
1848 struct mbuf_chain chain[MAXCPU];
1849
1850 if ((sc->sc_flags & ET_FLAG_TXRX_ENABLED) == 0)
1851 return;
1852
1853 rxs_stat_ring = rxsd->rxsd_status->rxs_stat_ring;
1854 rxst_wrap = (rxs_stat_ring & ET_RXS_STATRING_WRAP) ? 1 : 0;
1855 rxst_index = __SHIFTOUT(rxs_stat_ring, ET_RXS_STATRING_INDEX);
1856
1857 ether_input_chain_init(chain);
1858
1859 while (rxst_index != rxst_ring->rsr_index ||
1860 rxst_wrap != rxst_ring->rsr_wrap) {
1861 struct et_rxbuf_data *rbd;
1862 struct et_rxdesc_ring *rx_ring;
1863 struct et_rxstat *st;
1864 struct mbuf *m;
1865 int buflen, buf_idx, ring_idx;
1866 uint32_t rxstat_pos, rxring_pos;
1867
1868 KKASSERT(rxst_ring->rsr_index < ET_RX_NSTAT);
1869 st = &rxst_ring->rsr_stat[rxst_ring->rsr_index];
1870
1871 buflen = __SHIFTOUT(st->rxst_info2, ET_RXST_INFO2_LEN);
1872 buf_idx = __SHIFTOUT(st->rxst_info2, ET_RXST_INFO2_BUFIDX);
1873 ring_idx = __SHIFTOUT(st->rxst_info2, ET_RXST_INFO2_RINGIDX);
1874
1875 if (++rxst_ring->rsr_index == ET_RX_NSTAT) {
1876 rxst_ring->rsr_index = 0;
1877 rxst_ring->rsr_wrap ^= 1;
1878 }
1879 rxstat_pos = __SHIFTIN(rxst_ring->rsr_index,
1880 ET_RXSTAT_POS_INDEX);
1881 if (rxst_ring->rsr_wrap)
1882 rxstat_pos |= ET_RXSTAT_POS_WRAP;
1883 CSR_WRITE_4(sc, ET_RXSTAT_POS, rxstat_pos);
1884
1885 if (ring_idx >= ET_RX_NRING) {
1886 ifp->if_ierrors++;
1887 if_printf(ifp, "invalid ring index %d\n", ring_idx);
1888 continue;
1889 }
1890 if (buf_idx >= ET_RX_NDESC) {
1891 ifp->if_ierrors++;
1892 if_printf(ifp, "invalid buf index %d\n", buf_idx);
1893 continue;
1894 }
1895
1896 rbd = &sc->sc_rx_data[ring_idx];
1897 m = rbd->rbd_buf[buf_idx].rb_mbuf;
1898
1899 if (rbd->rbd_newbuf(rbd, buf_idx, 0) == 0) {
1900 if (buflen < ETHER_CRC_LEN) {
1901 m_freem(m);
1902 ifp->if_ierrors++;
1903 } else {
1904 m->m_pkthdr.len = m->m_len = buflen;
1905 m->m_pkthdr.rcvif = ifp;
1906
1907 m_adj(m, -ETHER_CRC_LEN);
1908
1909 ifp->if_ipackets++;
1910 ether_input_chain(ifp, m, NULL, chain);
1911 }
1912 } else {
1913 ifp->if_ierrors++;
1914 }
1915 m = NULL; /* Catch invalid reference */
1916
1917 rx_ring = &sc->sc_rx_ring[ring_idx];
1918
1919 if (buf_idx != rx_ring->rr_index) {
1920 if_printf(ifp, "WARNING!! ring %d, "
1921 "buf_idx %d, rr_idx %d\n",
1922 ring_idx, buf_idx, rx_ring->rr_index);
1923 }
1924
1925 KKASSERT(rx_ring->rr_index < ET_RX_NDESC);
1926 if (++rx_ring->rr_index == ET_RX_NDESC) {
1927 rx_ring->rr_index = 0;
1928 rx_ring->rr_wrap ^= 1;
1929 }
1930 rxring_pos = __SHIFTIN(rx_ring->rr_index, ET_RX_RING_POS_INDEX);
1931 if (rx_ring->rr_wrap)
1932 rxring_pos |= ET_RX_RING_POS_WRAP;
1933 CSR_WRITE_4(sc, rx_ring->rr_posreg, rxring_pos);
1934 }
1935
1936 ether_input_dispatch(chain);
1937 }
1938
1939 static int
1940 et_encap(struct et_softc *sc, struct mbuf **m0)
1941 {
1942 bus_dma_segment_t segs[ET_NSEG_MAX];
1943 struct et_txdesc_ring *tx_ring = &sc->sc_tx_ring;
1944 struct et_txbuf_data *tbd = &sc->sc_tx_data;
1945 struct et_txdesc *td;
1946 bus_dmamap_t map;
1947 int error, maxsegs, nsegs, first_idx, last_idx, i;
1948 uint32_t tx_ready_pos, last_td_ctrl2;
1949
1950 maxsegs = ET_TX_NDESC - tbd->tbd_used;
1951 if (maxsegs > ET_NSEG_MAX)
1952 maxsegs = ET_NSEG_MAX;
1953 KASSERT(maxsegs >= ET_NSEG_SPARE,
1954 ("not enough spare TX desc (%d)\n", maxsegs));
1955
1956 KKASSERT(tx_ring->tr_ready_index < ET_TX_NDESC);
1957 first_idx = tx_ring->tr_ready_index;
1958 map = tbd->tbd_buf[first_idx].tb_dmap;
1959
1960 error = bus_dmamap_load_mbuf_defrag(sc->sc_txbuf_dtag, map, m0,
1961 segs, maxsegs, &nsegs, BUS_DMA_NOWAIT);
1962 if (error)
1963 goto back;
1964 bus_dmamap_sync(sc->sc_txbuf_dtag, map, BUS_DMASYNC_PREWRITE);
1965
1966 last_td_ctrl2 = ET_TDCTRL2_LAST_FRAG;
1967 sc->sc_tx += nsegs;
1968 if (sc->sc_tx / sc->sc_tx_intr_nsegs != sc->sc_tx_intr) {
1969 sc->sc_tx_intr = sc->sc_tx / sc->sc_tx_intr_nsegs;
1970 last_td_ctrl2 |= ET_TDCTRL2_INTR;
1971 }
1972
1973 last_idx = -1;
1974 for (i = 0; i < nsegs; ++i) {
1975 int idx;
1976
1977 idx = (first_idx + i) % ET_TX_NDESC;
1978 td = &tx_ring->tr_desc[idx];
1979 td->td_addr_hi = ET_ADDR_HI(segs[i].ds_addr);
1980 td->td_addr_lo = ET_ADDR_LO(segs[i].ds_addr);
1981 td->td_ctrl1 = __SHIFTIN(segs[i].ds_len, ET_TDCTRL1_LEN);
1982
1983 if (i == nsegs - 1) { /* Last frag */
1984 td->td_ctrl2 = last_td_ctrl2;
1985 last_idx = idx;
1986 }
1987
1988 KKASSERT(tx_ring->tr_ready_index < ET_TX_NDESC);
1989 if (++tx_ring->tr_ready_index == ET_TX_NDESC) {
1990 tx_ring->tr_ready_index = 0;
1991 tx_ring->tr_ready_wrap ^= 1;
1992 }
1993 }
1994 td = &tx_ring->tr_desc[first_idx];
1995 td->td_ctrl2 |= ET_TDCTRL2_FIRST_FRAG; /* First frag */
1996
1997 KKASSERT(last_idx >= 0);
1998 tbd->tbd_buf[first_idx].tb_dmap = tbd->tbd_buf[last_idx].tb_dmap;
1999 tbd->tbd_buf[last_idx].tb_dmap = map;
2000 tbd->tbd_buf[last_idx].tb_mbuf = *m0;
2001
2002 tbd->tbd_used += nsegs;
2003 KKASSERT(tbd->tbd_used <= ET_TX_NDESC);
2004
2005 tx_ready_pos = __SHIFTIN(tx_ring->tr_ready_index,
2006 ET_TX_READY_POS_INDEX);
2007 if (tx_ring->tr_ready_wrap)
2008 tx_ready_pos |= ET_TX_READY_POS_WRAP;
2009 CSR_WRITE_4(sc, ET_TX_READY_POS, tx_ready_pos);
2010
2011 error = 0;
2012 back:
2013 if (error) {
2014 m_freem(*m0);
2015 *m0 = NULL;
2016 }
2017 return error;
2018 }
2019
2020 static void
2021 et_txeof(struct et_softc *sc, int start)
2022 {
2023 struct ifnet *ifp = &sc->arpcom.ac_if;
2024 struct et_txdesc_ring *tx_ring = &sc->sc_tx_ring;
2025 struct et_txbuf_data *tbd = &sc->sc_tx_data;
2026 uint32_t tx_done;
2027 int end, wrap;
2028
2029 if ((sc->sc_flags & ET_FLAG_TXRX_ENABLED) == 0)
2030 return;
2031
2032 if (tbd->tbd_used == 0)
2033 return;
2034
2035 tx_done = CSR_READ_4(sc, ET_TX_DONE_POS);
2036 end = __SHIFTOUT(tx_done, ET_TX_DONE_POS_INDEX);
2037 wrap = (tx_done & ET_TX_DONE_POS_WRAP) ? 1 : 0;
2038
2039 while (tbd->tbd_start_index != end || tbd->tbd_start_wrap != wrap) {
2040 struct et_txbuf *tb;
2041
2042 KKASSERT(tbd->tbd_start_index < ET_TX_NDESC);
2043 tb = &tbd->tbd_buf[tbd->tbd_start_index];
2044
2045 bzero(&tx_ring->tr_desc[tbd->tbd_start_index],
2046 sizeof(struct et_txdesc));
2047
2048 if (tb->tb_mbuf != NULL) {
2049 bus_dmamap_unload(sc->sc_txbuf_dtag, tb->tb_dmap);
2050 m_freem(tb->tb_mbuf);
2051 tb->tb_mbuf = NULL;
2052 ifp->if_opackets++;
2053 }
2054
2055 if (++tbd->tbd_start_index == ET_TX_NDESC) {
2056 tbd->tbd_start_index = 0;
2057 tbd->tbd_start_wrap ^= 1;
2058 }
2059
2060 KKASSERT(tbd->tbd_used > 0);
2061 tbd->tbd_used--;
2062 }
2063
2064 if (tbd->tbd_used == 0)
2065 ifp->if_timer = 0;
2066 if (tbd->tbd_used + ET_NSEG_SPARE <= ET_TX_NDESC)
2067 ifp->if_flags &= ~IFF_OACTIVE;
2068
2069 if (start)
2070 if_devstart(ifp);
2071 }
2072
2073 static void
2074 et_tick(void *xsc)
2075 {
2076 struct et_softc *sc = xsc;
2077 struct ifnet *ifp = &sc->arpcom.ac_if;
2078 struct mii_data *mii = device_get_softc(sc->sc_miibus);
2079
2080 lwkt_serialize_enter(ifp->if_serializer);
2081
2082 mii_tick(mii);
2083 if ((sc->sc_flags & ET_FLAG_TXRX_ENABLED) == 0 &&
2084 (mii->mii_media_status & IFM_ACTIVE) &&
2085 IFM_SUBTYPE(mii->mii_media_active) != IFM_NONE) {
2086 if_printf(ifp, "Link up, enable TX/RX\n");
2087 if (et_enable_txrx(sc, 0) == 0)
2088 if_devstart(ifp);
2089 }
2090 callout_reset(&sc->sc_tick, hz, et_tick, sc);
2091
2092 lwkt_serialize_exit(ifp->if_serializer);
2093 }
2094
2095 static int
2096 et_newbuf_cluster(struct et_rxbuf_data *rbd, int buf_idx, int init)
2097 {
2098 return et_newbuf(rbd, buf_idx, init, MCLBYTES);
2099 }
2100
2101 static int
2102 et_newbuf_hdr(struct et_rxbuf_data *rbd, int buf_idx, int init)
2103 {
2104 return et_newbuf(rbd, buf_idx, init, MHLEN);
2105 }
2106
2107 static int
2108 et_newbuf(struct et_rxbuf_data *rbd, int buf_idx, int init, int len0)
2109 {
2110 struct et_softc *sc = rbd->rbd_softc;
2111 struct et_rxbuf *rb;
2112 struct mbuf *m;
2113 bus_dma_segment_t seg;
2114 bus_dmamap_t dmap;
2115 int error, len, nseg;
2116
2117 KASSERT(!rbd->rbd_jumbo, ("calling %s with jumbo ring\n", __func__));
2118
2119 KKASSERT(buf_idx < ET_RX_NDESC);
2120 rb = &rbd->rbd_buf[buf_idx];
2121
2122 m = m_getl(len0, init ? MB_WAIT : MB_DONTWAIT, MT_DATA, M_PKTHDR, &len);
2123 if (m == NULL) {
2124 error = ENOBUFS;
2125
2126 if (init) {
2127 if_printf(&sc->arpcom.ac_if,
2128 "m_getl failed, size %d\n", len0);
2129 return error;
2130 } else {
2131 goto back;
2132 }
2133 }
2134 m->m_len = m->m_pkthdr.len = len;
2135
2136 /*
2137 * Try load RX mbuf into temporary DMA tag
2138 */
2139 error = bus_dmamap_load_mbuf_segment(sc->sc_rxbuf_dtag,
2140 sc->sc_rxbuf_tmp_dmap, m, &seg, 1, &nseg,
2141 BUS_DMA_NOWAIT);
2142 if (error) {
2143 m_freem(m);
2144 if (init) {
2145 if_printf(&sc->arpcom.ac_if, "can't load RX mbuf\n");
2146 return error;
2147 } else {
2148 goto back;
2149 }
2150 }
2151
2152 if (!init) {
2153 bus_dmamap_sync(sc->sc_rxbuf_dtag, rb->rb_dmap,
2154 BUS_DMASYNC_POSTREAD);
2155 bus_dmamap_unload(sc->sc_rxbuf_dtag, rb->rb_dmap);
2156 }
2157 rb->rb_mbuf = m;
2158 rb->rb_paddr = seg.ds_addr;
2159
2160 /*
2161 * Swap RX buf's DMA map with the loaded temporary one
2162 */
2163 dmap = rb->rb_dmap;
2164 rb->rb_dmap = sc->sc_rxbuf_tmp_dmap;
2165 sc->sc_rxbuf_tmp_dmap = dmap;
2166
2167 error = 0;
2168 back:
2169 et_setup_rxdesc(rbd, buf_idx, rb->rb_paddr);
2170 return error;
2171 }
2172
2173 static int
2174 et_sysctl_rx_intr_npkts(SYSCTL_HANDLER_ARGS)
2175 {
2176 struct et_softc *sc = arg1;
2177 struct ifnet *ifp = &sc->arpcom.ac_if;
2178 int error = 0, v;
2179
2180 lwkt_serialize_enter(ifp->if_serializer);
2181
2182 v = sc->sc_rx_intr_npkts;
2183 error = sysctl_handle_int(oidp, &v, 0, req);
2184 if (error || req->newptr == NULL)
2185 goto back;
2186 if (v <= 0) {
2187 error = EINVAL;
2188 goto back;
2189 }
2190
2191 if (sc->sc_rx_intr_npkts != v) {
2192 if (ifp->if_flags & IFF_RUNNING)
2193 CSR_WRITE_4(sc, ET_RX_INTR_NPKTS, v);
2194 sc->sc_rx_intr_npkts = v;
2195 }
2196 back:
2197 lwkt_serialize_exit(ifp->if_serializer);
2198 return error;
2199 }
2200
2201 static int
2202 et_sysctl_rx_intr_delay(SYSCTL_HANDLER_ARGS)
2203 {
2204 struct et_softc *sc = arg1;
2205 struct ifnet *ifp = &sc->arpcom.ac_if;
2206 int error = 0, v;
2207
2208 lwkt_serialize_enter(ifp->if_serializer);
2209
2210 v = sc->sc_rx_intr_delay;
2211 error = sysctl_handle_int(oidp, &v, 0, req);
2212 if (error || req->newptr == NULL)
2213 goto back;
2214 if (v <= 0) {
2215 error = EINVAL;
2216 goto back;
2217 }
2218
2219 if (sc->sc_rx_intr_delay != v) {
2220 if (ifp->if_flags & IFF_RUNNING)
2221 CSR_WRITE_4(sc, ET_RX_INTR_DELAY, v);
2222 sc->sc_rx_intr_delay = v;
2223 }
2224 back:
2225 lwkt_serialize_exit(ifp->if_serializer);
2226 return error;
2227 }
2228
2229 static void
2230 et_setmedia(struct et_softc *sc)
2231 {
2232 struct mii_data *mii = device_get_softc(sc->sc_miibus);
2233 uint32_t cfg2, ctrl;
2234
2235 cfg2 = CSR_READ_4(sc, ET_MAC_CFG2);
2236 cfg2 &= ~(ET_MAC_CFG2_MODE_MII | ET_MAC_CFG2_MODE_GMII |
2237 ET_MAC_CFG2_FDX | ET_MAC_CFG2_BIGFRM);
2238 cfg2 |= ET_MAC_CFG2_LENCHK | ET_MAC_CFG2_CRC | ET_MAC_CFG2_PADCRC |
2239 __SHIFTIN(7, ET_MAC_CFG2_PREAMBLE_LEN);
2240
2241 ctrl = CSR_READ_4(sc, ET_MAC_CTRL);
2242 ctrl &= ~(ET_MAC_CTRL_GHDX | ET_MAC_CTRL_MODE_MII);
2243
2244 if (IFM_SUBTYPE(mii->mii_media_active) == IFM_1000_T) {
2245 cfg2 |= ET_MAC_CFG2_MODE_GMII;
2246 } else {
2247 cfg2 |= ET_MAC_CFG2_MODE_MII;
2248 ctrl |= ET_MAC_CTRL_MODE_MII;
2249 }
2250
2251 if ((mii->mii_media_active & IFM_GMASK) == IFM_FDX)
2252 cfg2 |= ET_MAC_CFG2_FDX;
2253 else
2254 ctrl |= ET_MAC_CTRL_GHDX;
2255
2256 CSR_WRITE_4(sc, ET_MAC_CTRL, ctrl);
2257 CSR_WRITE_4(sc, ET_MAC_CFG2, cfg2);
2258 }
2259
2260 static int
2261 et_jumbo_mem_alloc(device_t dev)
2262 {
2263 struct et_softc *sc = device_get_softc(dev);
2264 struct et_jumbo_data *jd = &sc->sc_jumbo_data;
2265 bus_addr_t paddr;
2266 uint8_t *buf;
2267 int i;
2268
2269 jd->jd_buf = bus_dmamem_coherent_any(sc->sc_dtag,
2270 ET_JUMBO_ALIGN, ET_JUMBO_MEM_SIZE, BUS_DMA_WAITOK,
2271 &jd->jd_dtag, &jd->jd_dmap, &paddr);
2272 if (jd->jd_buf == NULL) {
2273 device_printf(dev, "can't create jumbo DMA stuffs\n");
2274 return ENOMEM;
2275 }
2276
2277 jd->jd_slots = kmalloc(sizeof(*jd->jd_slots) * ET_JSLOTS, M_DEVBUF,
2278 M_WAITOK | M_ZERO);
2279 lwkt_serialize_init(&jd->jd_serializer);
2280 SLIST_INIT(&jd->jd_free_slots);
2281
2282 buf = jd->jd_buf;
2283 for (i = 0; i < ET_JSLOTS; ++i) {
2284 struct et_jslot *jslot = &jd->jd_slots[i];
2285
2286 jslot->jslot_data = jd;
2287 jslot->jslot_buf = buf;
2288 jslot->jslot_paddr = paddr;
2289 jslot->jslot_inuse = 0;
2290 jslot->jslot_index = i;
2291 SLIST_INSERT_HEAD(&jd->jd_free_slots, jslot, jslot_link);
2292
2293 buf += ET_JLEN;
2294 paddr += ET_JLEN;
2295 }
2296 return 0;
2297 }
2298
2299 static void
2300 et_jumbo_mem_free(device_t dev)
2301 {
2302 struct et_softc *sc = device_get_softc(dev);
2303 struct et_jumbo_data *jd = &sc->sc_jumbo_data;
2304
2305 KKASSERT(sc->sc_flags & ET_FLAG_JUMBO);
2306
2307 kfree(jd->jd_slots, M_DEVBUF);
2308 et_dma_mem_destroy(jd->jd_dtag, jd->jd_buf, jd->jd_dmap);
2309 }
2310
2311 static struct et_jslot *
2312 et_jalloc(struct et_jumbo_data *jd)
2313 {
2314 struct et_jslot *jslot;
2315
2316 lwkt_serialize_enter(&jd->jd_serializer);
2317
2318 jslot = SLIST_FIRST(&jd->jd_free_slots);
2319 if (jslot) {
2320 SLIST_REMOVE_HEAD(&jd->jd_free_slots, jslot_link);
2321 jslot->jslot_inuse = 1;
2322 }
2323
2324 lwkt_serialize_exit(&jd->jd_serializer);
2325 return jslot;
2326 }
2327
2328 static void
2329 et_jfree(void *xjslot)
2330 {
2331 struct et_jslot *jslot = xjslot;
2332 struct et_jumbo_data *jd = jslot->jslot_data;
2333
2334 if (&jd->jd_slots[jslot->jslot_index] != jslot) {
2335 panic("%s wrong jslot!?\n", __func__);
2336 } else if (jslot->jslot_inuse == 0) {
2337 panic("%s jslot already freed\n", __func__);
2338 } else {
2339 lwkt_serialize_enter(&jd->jd_serializer);
2340
2341 atomic_subtract_int(&jslot->jslot_inuse, 1);
2342 if (jslot->jslot_inuse == 0) {
2343 SLIST_INSERT_HEAD(&jd->jd_free_slots, jslot,
2344 jslot_link);
2345 }
2346
2347 lwkt_serialize_exit(&jd->jd_serializer);
2348 }
2349 }
2350
2351 static void
2352 et_jref(void *xjslot)
2353 {
2354 struct et_jslot *jslot = xjslot;
2355 struct et_jumbo_data *jd = jslot->jslot_data;
2356
2357 if (&jd->jd_slots[jslot->jslot_index] != jslot)
2358 panic("%s wrong jslot!?\n", __func__);
2359 else if (jslot->jslot_inuse == 0)
2360 panic("%s jslot already freed\n", __func__);
2361 else
2362 atomic_add_int(&jslot->jslot_inuse, 1);
2363 }
2364
2365 static int
2366 et_newbuf_jumbo(struct et_rxbuf_data *rbd, int buf_idx, int init)
2367 {
2368 struct et_softc *sc = rbd->rbd_softc;
2369 struct et_rxbuf *rb;
2370 struct mbuf *m;
2371 struct et_jslot *jslot;
2372 int error;
2373
2374 KASSERT(rbd->rbd_jumbo, ("calling %s with non-jumbo ring\n", __func__));
2375
2376 KKASSERT(buf_idx < ET_RX_NDESC);
2377 rb = &rbd->rbd_buf[buf_idx];
2378
2379 error = ENOBUFS;
2380
2381 MGETHDR(m, init ? MB_WAIT : MB_DONTWAIT, MT_DATA);
2382 if (m == NULL) {
2383 if (init) {
2384 if_printf(&sc->arpcom.ac_if, "MGETHDR failed\n");
2385 return error;
2386 } else {
2387 goto back;
2388 }
2389 }
2390
2391 jslot = et_jalloc(&sc->sc_jumbo_data);
2392 if (jslot == NULL) {
2393 m_freem(m);
2394
2395 if (init) {
2396 if_printf(&sc->arpcom.ac_if,
2397 "jslot allocation failed\n");
2398 return error;
2399 } else {
2400 goto back;
2401 }
2402 }
2403
2404 m->m_ext.ext_arg = jslot;
2405 m->m_ext.ext_buf = jslot->jslot_buf;
2406 m->m_ext.ext_free = et_jfree;
2407 m->m_ext.ext_ref = et_jref;
2408 m->m_ext.ext_size = ET_JUMBO_FRAMELEN;
2409 m->m_flags |= M_EXT;
2410 m->m_data = m->m_ext.ext_buf;
2411 m->m_len = m->m_pkthdr.len = m->m_ext.ext_size;
2412
2413 rb->rb_mbuf = m;
2414 rb->rb_paddr = jslot->jslot_paddr;
2415
2416 error = 0;
2417 back:
2418 et_setup_rxdesc(rbd, buf_idx, rb->rb_paddr);
2419 return error;
2420 }
2421
2422 static void
2423 et_setup_rxdesc(struct et_rxbuf_data *rbd, int buf_idx, bus_addr_t paddr)
2424 {
2425 struct et_rxdesc_ring *rx_ring = rbd->rbd_ring;
2426 struct et_rxdesc *desc;
2427
2428 KKASSERT(buf_idx < ET_RX_NDESC);
2429 desc = &rx_ring->rr_desc[buf_idx];
2430
2431 desc->rd_addr_hi = ET_ADDR_HI(paddr);
2432 desc->rd_addr_lo = ET_ADDR_LO(paddr);
2433 desc->rd_ctrl = __SHIFTIN(buf_idx, ET_RDCTRL_BUFIDX);
2434 }
DragonFly BSD