2 * Copyright (c) 2003 Stuart Walsh<stu@ipng.org.uk>
3 * and Duncan Barclay<dmlb@dmlb.org>
5 * Redistribution and use in source and binary forms, with or without
6 * modification, are permitted provided that the following conditions
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.
14 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS 'AS IS' AND
15 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
16 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
17 * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
18 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
19 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
20 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
21 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
22 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
23 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
28 #include <sys/cdefs.h>
29 __FBSDID("$FreeBSD$");
31 #include <sys/param.h>
32 #include <sys/systm.h>
34 #include <sys/endian.h>
35 #include <sys/kernel.h>
36 #include <sys/malloc.h>
38 #include <sys/module.h>
40 #include <sys/socket.h>
41 #include <sys/sockio.h>
45 #include <net/ethernet.h>
46 #include <net/if_dl.h>
47 #include <net/if_media.h>
48 #include <net/if_types.h>
49 #include <net/if_vlan_var.h>
51 #include <dev/mii/mii.h>
52 #include <dev/mii/miivar.h>
54 #include <dev/pci/pcireg.h>
55 #include <dev/pci/pcivar.h>
57 #include <machine/bus.h>
59 #include <dev/bfe/if_bfereg.h>
61 MODULE_DEPEND(bfe, pci, 1, 1, 1);
62 MODULE_DEPEND(bfe, ether, 1, 1, 1);
63 MODULE_DEPEND(bfe, miibus, 1, 1, 1);
65 /* "device miibus" required. See GENERIC if you get errors here. */
66 #include "miibus_if.h"
68 #define BFE_DEVDESC_MAX 64 /* Maximum device description length */
70 static struct bfe_type bfe_devs[] = {
71 { BCOM_VENDORID, BCOM_DEVICEID_BCM4401,
72 "Broadcom BCM4401 Fast Ethernet" },
73 { BCOM_VENDORID, BCOM_DEVICEID_BCM4401B0,
74 "Broadcom BCM4401-B0 Fast Ethernet" },
78 static int bfe_probe (device_t);
79 static int bfe_attach (device_t);
80 static int bfe_detach (device_t);
81 static int bfe_suspend (device_t);
82 static int bfe_resume (device_t);
83 static void bfe_release_resources (struct bfe_softc *);
84 static void bfe_intr (void *);
85 static int bfe_encap (struct bfe_softc *, struct mbuf **);
86 static void bfe_start (struct ifnet *);
87 static void bfe_start_locked (struct ifnet *);
88 static int bfe_ioctl (struct ifnet *, u_long, caddr_t);
89 static void bfe_init (void *);
90 static void bfe_init_locked (void *);
91 static void bfe_stop (struct bfe_softc *);
92 static void bfe_watchdog (struct bfe_softc *);
93 static int bfe_shutdown (device_t);
94 static void bfe_tick (void *);
95 static void bfe_txeof (struct bfe_softc *);
96 static void bfe_rxeof (struct bfe_softc *);
97 static void bfe_set_rx_mode (struct bfe_softc *);
98 static int bfe_list_rx_init (struct bfe_softc *);
99 static void bfe_list_tx_init (struct bfe_softc *);
100 static void bfe_discard_buf (struct bfe_softc *, int);
101 static int bfe_list_newbuf (struct bfe_softc *, int);
102 static void bfe_rx_ring_free (struct bfe_softc *);
104 static void bfe_pci_setup (struct bfe_softc *, u_int32_t);
105 static int bfe_ifmedia_upd (struct ifnet *);
106 static void bfe_ifmedia_sts (struct ifnet *, struct ifmediareq *);
107 static int bfe_miibus_readreg (device_t, int, int);
108 static int bfe_miibus_writereg (device_t, int, int, int);
109 static void bfe_miibus_statchg (device_t);
110 static int bfe_wait_bit (struct bfe_softc *, u_int32_t, u_int32_t,
112 static void bfe_get_config (struct bfe_softc *sc);
113 static void bfe_read_eeprom (struct bfe_softc *, u_int8_t *);
114 static void bfe_stats_update (struct bfe_softc *);
115 static void bfe_clear_stats (struct bfe_softc *);
116 static int bfe_readphy (struct bfe_softc *, u_int32_t, u_int32_t*);
117 static int bfe_writephy (struct bfe_softc *, u_int32_t, u_int32_t);
118 static int bfe_resetphy (struct bfe_softc *);
119 static int bfe_setupphy (struct bfe_softc *);
120 static void bfe_chip_reset (struct bfe_softc *);
121 static void bfe_chip_halt (struct bfe_softc *);
122 static void bfe_core_reset (struct bfe_softc *);
123 static void bfe_core_disable (struct bfe_softc *);
124 static int bfe_dma_alloc (struct bfe_softc *);
125 static void bfe_dma_free (struct bfe_softc *sc);
126 static void bfe_dma_map (void *, bus_dma_segment_t *, int, int);
127 static void bfe_cam_write (struct bfe_softc *, u_char *, int);
129 static device_method_t bfe_methods[] = {
130 /* Device interface */
131 DEVMETHOD(device_probe, bfe_probe),
132 DEVMETHOD(device_attach, bfe_attach),
133 DEVMETHOD(device_detach, bfe_detach),
134 DEVMETHOD(device_shutdown, bfe_shutdown),
135 DEVMETHOD(device_suspend, bfe_suspend),
136 DEVMETHOD(device_resume, bfe_resume),
139 DEVMETHOD(bus_print_child, bus_generic_print_child),
140 DEVMETHOD(bus_driver_added, bus_generic_driver_added),
143 DEVMETHOD(miibus_readreg, bfe_miibus_readreg),
144 DEVMETHOD(miibus_writereg, bfe_miibus_writereg),
145 DEVMETHOD(miibus_statchg, bfe_miibus_statchg),
150 static driver_t bfe_driver = {
153 sizeof(struct bfe_softc)
156 static devclass_t bfe_devclass;
158 DRIVER_MODULE(bfe, pci, bfe_driver, bfe_devclass, 0, 0);
159 DRIVER_MODULE(miibus, bfe, miibus_driver, miibus_devclass, 0, 0);
162 * Probe for a Broadcom 4401 chip.
165 bfe_probe(device_t dev)
171 while (t->bfe_name != NULL) {
172 if (pci_get_vendor(dev) == t->bfe_vid &&
173 pci_get_device(dev) == t->bfe_did) {
174 device_set_desc(dev, t->bfe_name);
175 return (BUS_PROBE_DEFAULT);
183 struct bfe_dmamap_arg {
184 bus_addr_t bfe_busaddr;
188 bfe_dma_alloc(struct bfe_softc *sc)
190 struct bfe_dmamap_arg ctx;
191 struct bfe_rx_data *rd;
192 struct bfe_tx_data *td;
196 * parent tag. Apparently the chip cannot handle any DMA address
199 error = bus_dma_tag_create(bus_get_dma_tag(sc->bfe_dev), /* parent */
200 1, 0, /* alignment, boundary */
201 BFE_DMA_MAXADDR, /* lowaddr */
202 BUS_SPACE_MAXADDR, /* highaddr */
203 NULL, NULL, /* filter, filterarg */
204 BUS_SPACE_MAXSIZE_32BIT, /* maxsize */
206 BUS_SPACE_MAXSIZE_32BIT, /* maxsegsize */
208 NULL, NULL, /* lockfunc, lockarg */
209 &sc->bfe_parent_tag);
211 device_printf(sc->bfe_dev, "cannot create parent DMA tag.\n");
215 /* Create tag for Tx ring. */
216 error = bus_dma_tag_create(sc->bfe_parent_tag, /* parent */
217 BFE_TX_RING_ALIGN, 0, /* alignment, boundary */
218 BUS_SPACE_MAXADDR, /* lowaddr */
219 BUS_SPACE_MAXADDR, /* highaddr */
220 NULL, NULL, /* filter, filterarg */
221 BFE_TX_LIST_SIZE, /* maxsize */
223 BFE_TX_LIST_SIZE, /* maxsegsize */
225 NULL, NULL, /* lockfunc, lockarg */
228 device_printf(sc->bfe_dev, "cannot create Tx ring DMA tag.\n");
232 /* Create tag for Rx ring. */
233 error = bus_dma_tag_create(sc->bfe_parent_tag, /* parent */
234 BFE_RX_RING_ALIGN, 0, /* alignment, boundary */
235 BUS_SPACE_MAXADDR, /* lowaddr */
236 BUS_SPACE_MAXADDR, /* highaddr */
237 NULL, NULL, /* filter, filterarg */
238 BFE_RX_LIST_SIZE, /* maxsize */
240 BFE_RX_LIST_SIZE, /* maxsegsize */
242 NULL, NULL, /* lockfunc, lockarg */
245 device_printf(sc->bfe_dev, "cannot create Rx ring DMA tag.\n");
249 /* Create tag for Tx buffers. */
250 error = bus_dma_tag_create(sc->bfe_parent_tag, /* parent */
251 1, 0, /* alignment, boundary */
252 BUS_SPACE_MAXADDR, /* lowaddr */
253 BUS_SPACE_MAXADDR, /* highaddr */
254 NULL, NULL, /* filter, filterarg */
255 MCLBYTES * BFE_MAXTXSEGS, /* maxsize */
256 BFE_MAXTXSEGS, /* nsegments */
257 MCLBYTES, /* maxsegsize */
259 NULL, NULL, /* lockfunc, lockarg */
260 &sc->bfe_txmbuf_tag);
262 device_printf(sc->bfe_dev,
263 "cannot create Tx buffer DMA tag.\n");
267 /* Create tag for Rx buffers. */
268 error = bus_dma_tag_create(sc->bfe_parent_tag, /* parent */
269 1, 0, /* alignment, boundary */
270 BUS_SPACE_MAXADDR, /* lowaddr */
271 BUS_SPACE_MAXADDR, /* highaddr */
272 NULL, NULL, /* filter, filterarg */
273 MCLBYTES, /* maxsize */
275 MCLBYTES, /* maxsegsize */
277 NULL, NULL, /* lockfunc, lockarg */
278 &sc->bfe_rxmbuf_tag);
280 device_printf(sc->bfe_dev,
281 "cannot create Rx buffer DMA tag.\n");
285 /* Allocate DMA'able memory and load DMA map. */
286 error = bus_dmamem_alloc(sc->bfe_tx_tag, (void *)&sc->bfe_tx_list,
287 BUS_DMA_WAITOK | BUS_DMA_ZERO | BUS_DMA_COHERENT, &sc->bfe_tx_map);
289 device_printf(sc->bfe_dev,
290 "cannot allocate DMA'able memory for Tx ring.\n");
294 error = bus_dmamap_load(sc->bfe_tx_tag, sc->bfe_tx_map,
295 sc->bfe_tx_list, BFE_TX_LIST_SIZE, bfe_dma_map, &ctx,
297 if (error != 0 || ctx.bfe_busaddr == 0) {
298 device_printf(sc->bfe_dev,
299 "cannot load DMA'able memory for Tx ring.\n");
302 sc->bfe_tx_dma = BFE_ADDR_LO(ctx.bfe_busaddr);
304 error = bus_dmamem_alloc(sc->bfe_rx_tag, (void *)&sc->bfe_rx_list,
305 BUS_DMA_WAITOK | BUS_DMA_ZERO | BUS_DMA_COHERENT, &sc->bfe_rx_map);
307 device_printf(sc->bfe_dev,
308 "cannot allocate DMA'able memory for Rx ring.\n");
312 error = bus_dmamap_load(sc->bfe_rx_tag, sc->bfe_rx_map,
313 sc->bfe_rx_list, BFE_RX_LIST_SIZE, bfe_dma_map, &ctx,
315 if (error != 0 || ctx.bfe_busaddr == 0) {
316 device_printf(sc->bfe_dev,
317 "cannot load DMA'able memory for Rx ring.\n");
320 sc->bfe_rx_dma = BFE_ADDR_LO(ctx.bfe_busaddr);
322 /* Create DMA maps for Tx buffers. */
323 for (i = 0; i < BFE_TX_LIST_CNT; i++) {
324 td = &sc->bfe_tx_ring[i];
327 error = bus_dmamap_create(sc->bfe_txmbuf_tag, 0, &td->bfe_map);
329 device_printf(sc->bfe_dev,
330 "cannot create DMA map for Tx.\n");
335 /* Create spare DMA map for Rx buffers. */
336 error = bus_dmamap_create(sc->bfe_rxmbuf_tag, 0, &sc->bfe_rx_sparemap);
338 device_printf(sc->bfe_dev, "cannot create spare DMA map for Rx.\n");
341 /* Create DMA maps for Rx buffers. */
342 for (i = 0; i < BFE_RX_LIST_CNT; i++) {
343 rd = &sc->bfe_rx_ring[i];
347 error = bus_dmamap_create(sc->bfe_rxmbuf_tag, 0, &rd->bfe_map);
349 device_printf(sc->bfe_dev,
350 "cannot create DMA map for Rx.\n");
360 bfe_dma_free(struct bfe_softc *sc)
362 struct bfe_tx_data *td;
363 struct bfe_rx_data *rd;
367 if (sc->bfe_tx_tag != NULL) {
368 if (sc->bfe_tx_map != NULL)
369 bus_dmamap_unload(sc->bfe_tx_tag, sc->bfe_tx_map);
370 if (sc->bfe_tx_map != NULL && sc->bfe_tx_list != NULL)
371 bus_dmamem_free(sc->bfe_tx_tag, sc->bfe_tx_list,
373 sc->bfe_tx_map = NULL;
374 sc->bfe_tx_list = NULL;
375 bus_dma_tag_destroy(sc->bfe_tx_tag);
376 sc->bfe_tx_tag = NULL;
380 if (sc->bfe_rx_tag != NULL) {
381 if (sc->bfe_rx_map != NULL)
382 bus_dmamap_unload(sc->bfe_rx_tag, sc->bfe_rx_map);
383 if (sc->bfe_rx_map != NULL && sc->bfe_rx_list != NULL)
384 bus_dmamem_free(sc->bfe_rx_tag, sc->bfe_rx_list,
386 sc->bfe_rx_map = NULL;
387 sc->bfe_rx_list = NULL;
388 bus_dma_tag_destroy(sc->bfe_rx_tag);
389 sc->bfe_rx_tag = NULL;
393 if (sc->bfe_txmbuf_tag != NULL) {
394 for (i = 0; i < BFE_TX_LIST_CNT; i++) {
395 td = &sc->bfe_tx_ring[i];
396 if (td->bfe_map != NULL) {
397 bus_dmamap_destroy(sc->bfe_txmbuf_tag,
402 bus_dma_tag_destroy(sc->bfe_txmbuf_tag);
403 sc->bfe_txmbuf_tag = NULL;
407 if (sc->bfe_rxmbuf_tag != NULL) {
408 for (i = 0; i < BFE_RX_LIST_CNT; i++) {
409 rd = &sc->bfe_rx_ring[i];
410 if (rd->bfe_map != NULL) {
411 bus_dmamap_destroy(sc->bfe_rxmbuf_tag,
416 if (sc->bfe_rx_sparemap != NULL) {
417 bus_dmamap_destroy(sc->bfe_rxmbuf_tag,
418 sc->bfe_rx_sparemap);
419 sc->bfe_rx_sparemap = NULL;
421 bus_dma_tag_destroy(sc->bfe_rxmbuf_tag);
422 sc->bfe_rxmbuf_tag = NULL;
425 if (sc->bfe_parent_tag != NULL) {
426 bus_dma_tag_destroy(sc->bfe_parent_tag);
427 sc->bfe_parent_tag = NULL;
432 bfe_attach(device_t dev)
434 struct ifnet *ifp = NULL;
435 struct bfe_softc *sc;
438 sc = device_get_softc(dev);
439 mtx_init(&sc->bfe_mtx, device_get_nameunit(dev), MTX_NETWORK_LOCK,
441 callout_init_mtx(&sc->bfe_stat_co, &sc->bfe_mtx, 0);
446 * Map control/status registers.
448 pci_enable_busmaster(dev);
451 sc->bfe_res = bus_alloc_resource_any(dev, SYS_RES_MEMORY, &rid,
453 if (sc->bfe_res == NULL) {
454 device_printf(dev, "couldn't map memory\n");
459 /* Allocate interrupt */
462 sc->bfe_irq = bus_alloc_resource_any(dev, SYS_RES_IRQ, &rid,
463 RF_SHAREABLE | RF_ACTIVE);
464 if (sc->bfe_irq == NULL) {
465 device_printf(dev, "couldn't map interrupt\n");
470 if (bfe_dma_alloc(sc) != 0) {
471 device_printf(dev, "failed to allocate DMA resources\n");
476 /* Set up ifnet structure */
477 ifp = sc->bfe_ifp = if_alloc(IFT_ETHER);
479 device_printf(dev, "failed to if_alloc()\n");
484 if_initname(ifp, device_get_name(dev), device_get_unit(dev));
485 ifp->if_flags = IFF_BROADCAST | IFF_SIMPLEX | IFF_MULTICAST;
486 ifp->if_ioctl = bfe_ioctl;
487 ifp->if_start = bfe_start;
488 ifp->if_init = bfe_init;
489 ifp->if_mtu = ETHERMTU;
490 IFQ_SET_MAXLEN(&ifp->if_snd, BFE_TX_QLEN);
491 ifp->if_snd.ifq_drv_maxlen = BFE_TX_QLEN;
492 IFQ_SET_READY(&ifp->if_snd);
496 /* Reset the chip and turn on the PHY */
501 if (mii_phy_probe(dev, &sc->bfe_miibus,
502 bfe_ifmedia_upd, bfe_ifmedia_sts)) {
503 device_printf(dev, "MII without any PHY!\n");
508 ether_ifattach(ifp, sc->bfe_enaddr);
511 * Tell the upper layer(s) we support long frames.
513 ifp->if_data.ifi_hdrlen = sizeof(struct ether_vlan_header);
514 ifp->if_capabilities |= IFCAP_VLAN_MTU;
515 ifp->if_capenable |= IFCAP_VLAN_MTU;
518 * Hook interrupt last to avoid having to lock softc
520 error = bus_setup_intr(dev, sc->bfe_irq, INTR_TYPE_NET | INTR_MPSAFE,
521 NULL, bfe_intr, sc, &sc->bfe_intrhand);
524 device_printf(dev, "couldn't set up irq\n");
534 bfe_detach(device_t dev)
536 struct bfe_softc *sc;
539 sc = device_get_softc(dev);
543 if (device_is_attached(dev)) {
545 sc->bfe_flags |= BFE_FLAG_DETACH;
548 callout_drain(&sc->bfe_stat_co);
557 bus_generic_detach(dev);
558 if (sc->bfe_miibus != NULL)
559 device_delete_child(dev, sc->bfe_miibus);
561 bfe_release_resources(sc);
563 mtx_destroy(&sc->bfe_mtx);
569 * Stop all chip I/O so that the kernel's probe routines don't
570 * get confused by errant DMAs when rebooting.
573 bfe_shutdown(device_t dev)
575 struct bfe_softc *sc;
577 sc = device_get_softc(dev);
587 bfe_suspend(device_t dev)
589 struct bfe_softc *sc;
591 sc = device_get_softc(dev);
600 bfe_resume(device_t dev)
602 struct bfe_softc *sc;
605 sc = device_get_softc(dev);
609 if (ifp->if_flags & IFF_UP) {
611 if (ifp->if_drv_flags & IFF_DRV_RUNNING &&
612 !IFQ_DRV_IS_EMPTY(&ifp->if_snd))
613 bfe_start_locked(ifp);
621 bfe_miibus_readreg(device_t dev, int phy, int reg)
623 struct bfe_softc *sc;
626 sc = device_get_softc(dev);
627 if (phy != sc->bfe_phyaddr)
629 bfe_readphy(sc, reg, &ret);
635 bfe_miibus_writereg(device_t dev, int phy, int reg, int val)
637 struct bfe_softc *sc;
639 sc = device_get_softc(dev);
640 if (phy != sc->bfe_phyaddr)
642 bfe_writephy(sc, reg, val);
648 bfe_miibus_statchg(device_t dev)
650 struct bfe_softc *sc;
651 struct mii_data *mii;
654 sc = device_get_softc(dev);
655 mii = device_get_softc(sc->bfe_miibus);
657 sc->bfe_flags &= ~BFE_FLAG_LINK;
658 if ((mii->mii_media_status & (IFM_ACTIVE | IFM_AVALID)) ==
659 (IFM_ACTIVE | IFM_AVALID)) {
660 switch (IFM_SUBTYPE(mii->mii_media_active)) {
663 sc->bfe_flags |= BFE_FLAG_LINK;
670 /* XXX Should stop Rx/Tx engine prior to touching MAC. */
671 val = CSR_READ_4(sc, BFE_TX_CTRL);
672 val &= ~BFE_TX_DUPLEX;
673 if ((IFM_OPTIONS(mii->mii_media_active) & IFM_FDX) != 0) {
674 val |= BFE_TX_DUPLEX;
677 flow = CSR_READ_4(sc, BFE_RXCONF);
678 flow &= ~BFE_RXCONF_FLOW;
679 if ((IFM_OPTIONS(sc->sc_mii->mii_media_active) &
680 IFM_ETH_RXPAUSE) != 0)
681 flow |= BFE_RXCONF_FLOW;
682 CSR_WRITE_4(sc, BFE_RXCONF, flow);
684 * It seems that the hardware has Tx pause issues
685 * so enable only Rx pause.
687 flow = CSR_READ_4(sc, BFE_MAC_FLOW);
688 flow &= ~BFE_FLOW_PAUSE_ENAB;
689 CSR_WRITE_4(sc, BFE_MAC_FLOW, flow);
692 CSR_WRITE_4(sc, BFE_TX_CTRL, val);
696 bfe_tx_ring_free(struct bfe_softc *sc)
700 for(i = 0; i < BFE_TX_LIST_CNT; i++) {
701 if (sc->bfe_tx_ring[i].bfe_mbuf != NULL) {
702 bus_dmamap_sync(sc->bfe_txmbuf_tag,
703 sc->bfe_tx_ring[i].bfe_map, BUS_DMASYNC_POSTWRITE);
704 bus_dmamap_unload(sc->bfe_txmbuf_tag,
705 sc->bfe_tx_ring[i].bfe_map);
706 m_freem(sc->bfe_tx_ring[i].bfe_mbuf);
707 sc->bfe_tx_ring[i].bfe_mbuf = NULL;
710 bzero(sc->bfe_tx_list, BFE_TX_LIST_SIZE);
711 bus_dmamap_sync(sc->bfe_tx_tag, sc->bfe_tx_map,
712 BUS_DMASYNC_PREREAD | BUS_DMASYNC_PREWRITE);
716 bfe_rx_ring_free(struct bfe_softc *sc)
720 for (i = 0; i < BFE_RX_LIST_CNT; i++) {
721 if (sc->bfe_rx_ring[i].bfe_mbuf != NULL) {
722 bus_dmamap_sync(sc->bfe_rxmbuf_tag,
723 sc->bfe_rx_ring[i].bfe_map, BUS_DMASYNC_POSTREAD);
724 bus_dmamap_unload(sc->bfe_rxmbuf_tag,
725 sc->bfe_rx_ring[i].bfe_map);
726 m_freem(sc->bfe_rx_ring[i].bfe_mbuf);
727 sc->bfe_rx_ring[i].bfe_mbuf = NULL;
730 bzero(sc->bfe_rx_list, BFE_RX_LIST_SIZE);
731 bus_dmamap_sync(sc->bfe_rx_tag, sc->bfe_rx_map,
732 BUS_DMASYNC_PREREAD | BUS_DMASYNC_PREWRITE);
736 bfe_list_rx_init(struct bfe_softc *sc)
738 struct bfe_rx_data *rd;
741 sc->bfe_rx_prod = sc->bfe_rx_cons = 0;
742 bzero(sc->bfe_rx_list, BFE_RX_LIST_SIZE);
743 for (i = 0; i < BFE_RX_LIST_CNT; i++) {
744 rd = &sc->bfe_rx_ring[i];
747 if (bfe_list_newbuf(sc, i) != 0)
751 bus_dmamap_sync(sc->bfe_rx_tag, sc->bfe_rx_map,
752 BUS_DMASYNC_PREREAD | BUS_DMASYNC_PREWRITE);
753 CSR_WRITE_4(sc, BFE_DMARX_PTR, (i * sizeof(struct bfe_desc)));
759 bfe_list_tx_init(struct bfe_softc *sc)
763 sc->bfe_tx_cnt = sc->bfe_tx_prod = sc->bfe_tx_cons = 0;
764 bzero(sc->bfe_tx_list, BFE_TX_LIST_SIZE);
765 for (i = 0; i < BFE_TX_LIST_CNT; i++)
766 sc->bfe_tx_ring[i].bfe_mbuf = NULL;
768 bus_dmamap_sync(sc->bfe_tx_tag, sc->bfe_tx_map,
769 BUS_DMASYNC_PREREAD | BUS_DMASYNC_PREWRITE);
773 bfe_discard_buf(struct bfe_softc *sc, int c)
775 struct bfe_rx_data *r;
778 r = &sc->bfe_rx_ring[c];
779 d = &sc->bfe_rx_list[c];
780 d->bfe_ctrl = htole32(r->bfe_ctrl);
784 bfe_list_newbuf(struct bfe_softc *sc, int c)
786 struct bfe_rxheader *rx_header;
788 struct bfe_rx_data *r;
790 bus_dma_segment_t segs[1];
795 m = m_getcl(M_DONTWAIT, MT_DATA, M_PKTHDR);
796 m->m_len = m->m_pkthdr.len = MCLBYTES;
798 if (bus_dmamap_load_mbuf_sg(sc->bfe_rxmbuf_tag, sc->bfe_rx_sparemap,
799 m, segs, &nsegs, 0) != 0) {
804 KASSERT(nsegs == 1, ("%s: %d segments returned!", __func__, nsegs));
805 r = &sc->bfe_rx_ring[c];
806 if (r->bfe_mbuf != NULL) {
807 bus_dmamap_sync(sc->bfe_rxmbuf_tag, r->bfe_map,
808 BUS_DMASYNC_POSTREAD);
809 bus_dmamap_unload(sc->bfe_rxmbuf_tag, r->bfe_map);
812 r->bfe_map = sc->bfe_rx_sparemap;
813 sc->bfe_rx_sparemap = map;
816 rx_header = mtod(m, struct bfe_rxheader *);
818 rx_header->flags = 0;
819 bus_dmamap_sync(sc->bfe_rxmbuf_tag, r->bfe_map, BUS_DMASYNC_PREREAD);
821 ctrl = segs[0].ds_len & BFE_DESC_LEN;
822 KASSERT(ctrl > ETHER_MAX_LEN + 32, ("%s: buffer size too small(%d)!",
824 if (c == BFE_RX_LIST_CNT - 1)
825 ctrl |= BFE_DESC_EOT;
828 d = &sc->bfe_rx_list[c];
829 d->bfe_ctrl = htole32(ctrl);
830 /* The chip needs all addresses to be added to BFE_PCI_DMA. */
831 d->bfe_addr = htole32(BFE_ADDR_LO(segs[0].ds_addr) + BFE_PCI_DMA);
837 bfe_get_config(struct bfe_softc *sc)
839 u_int8_t eeprom[128];
841 bfe_read_eeprom(sc, eeprom);
843 sc->bfe_enaddr[0] = eeprom[79];
844 sc->bfe_enaddr[1] = eeprom[78];
845 sc->bfe_enaddr[2] = eeprom[81];
846 sc->bfe_enaddr[3] = eeprom[80];
847 sc->bfe_enaddr[4] = eeprom[83];
848 sc->bfe_enaddr[5] = eeprom[82];
850 sc->bfe_phyaddr = eeprom[90] & 0x1f;
851 sc->bfe_mdc_port = (eeprom[90] >> 14) & 0x1;
853 sc->bfe_core_unit = 0;
854 sc->bfe_dma_offset = BFE_PCI_DMA;
858 bfe_pci_setup(struct bfe_softc *sc, u_int32_t cores)
860 u_int32_t bar_orig, pci_rev, val;
862 bar_orig = pci_read_config(sc->bfe_dev, BFE_BAR0_WIN, 4);
863 pci_write_config(sc->bfe_dev, BFE_BAR0_WIN, BFE_REG_PCI, 4);
864 pci_rev = CSR_READ_4(sc, BFE_SBIDHIGH) & BFE_RC_MASK;
866 val = CSR_READ_4(sc, BFE_SBINTVEC);
868 CSR_WRITE_4(sc, BFE_SBINTVEC, val);
870 val = CSR_READ_4(sc, BFE_SSB_PCI_TRANS_2);
871 val |= BFE_SSB_PCI_PREF | BFE_SSB_PCI_BURST;
872 CSR_WRITE_4(sc, BFE_SSB_PCI_TRANS_2, val);
874 pci_write_config(sc->bfe_dev, BFE_BAR0_WIN, bar_orig, 4);
878 bfe_clear_stats(struct bfe_softc *sc)
884 CSR_WRITE_4(sc, BFE_MIB_CTRL, BFE_MIB_CLR_ON_READ);
885 for (reg = BFE_TX_GOOD_O; reg <= BFE_TX_PAUSE; reg += 4)
887 for (reg = BFE_RX_GOOD_O; reg <= BFE_RX_NPAUSE; reg += 4)
892 bfe_resetphy(struct bfe_softc *sc)
896 bfe_writephy(sc, 0, BMCR_RESET);
898 bfe_readphy(sc, 0, &val);
899 if (val & BMCR_RESET) {
900 device_printf(sc->bfe_dev, "PHY Reset would not complete.\n");
907 bfe_chip_halt(struct bfe_softc *sc)
910 /* disable interrupts - not that it actually does..*/
911 CSR_WRITE_4(sc, BFE_IMASK, 0);
912 CSR_READ_4(sc, BFE_IMASK);
914 CSR_WRITE_4(sc, BFE_ENET_CTRL, BFE_ENET_DISABLE);
915 bfe_wait_bit(sc, BFE_ENET_CTRL, BFE_ENET_DISABLE, 200, 1);
917 CSR_WRITE_4(sc, BFE_DMARX_CTRL, 0);
918 CSR_WRITE_4(sc, BFE_DMATX_CTRL, 0);
923 bfe_chip_reset(struct bfe_softc *sc)
929 /* Set the interrupt vector for the enet core */
930 bfe_pci_setup(sc, BFE_INTVEC_ENET0);
933 val = CSR_READ_4(sc, BFE_SBTMSLOW) &
934 (BFE_RESET | BFE_REJECT | BFE_CLOCK);
935 if (val == BFE_CLOCK) {
936 /* It is, so shut it down */
937 CSR_WRITE_4(sc, BFE_RCV_LAZY, 0);
938 CSR_WRITE_4(sc, BFE_ENET_CTRL, BFE_ENET_DISABLE);
939 bfe_wait_bit(sc, BFE_ENET_CTRL, BFE_ENET_DISABLE, 100, 1);
940 CSR_WRITE_4(sc, BFE_DMATX_CTRL, 0);
941 if (CSR_READ_4(sc, BFE_DMARX_STAT) & BFE_STAT_EMASK)
942 bfe_wait_bit(sc, BFE_DMARX_STAT, BFE_STAT_SIDLE,
944 CSR_WRITE_4(sc, BFE_DMARX_CTRL, 0);
951 * We want the phy registers to be accessible even when
952 * the driver is "downed" so initialize MDC preamble, frequency,
953 * and whether internal or external phy here.
956 /* 4402 has 62.5Mhz SB clock and internal phy */
957 CSR_WRITE_4(sc, BFE_MDIO_CTRL, 0x8d);
959 /* Internal or external PHY? */
960 val = CSR_READ_4(sc, BFE_DEVCTRL);
961 if (!(val & BFE_IPP))
962 CSR_WRITE_4(sc, BFE_ENET_CTRL, BFE_ENET_EPSEL);
963 else if (CSR_READ_4(sc, BFE_DEVCTRL) & BFE_EPR) {
964 BFE_AND(sc, BFE_DEVCTRL, ~BFE_EPR);
968 /* Enable CRC32 generation and set proper LED modes */
969 BFE_OR(sc, BFE_MAC_CTRL, BFE_CTRL_CRC32_ENAB | BFE_CTRL_LED);
971 /* Reset or clear powerdown control bit */
972 BFE_AND(sc, BFE_MAC_CTRL, ~BFE_CTRL_PDOWN);
974 CSR_WRITE_4(sc, BFE_RCV_LAZY, ((1 << BFE_LAZY_FC_SHIFT) &
978 * We don't want lazy interrupts, so just send them at
979 * the end of a frame, please
981 BFE_OR(sc, BFE_RCV_LAZY, 0);
983 /* Set max lengths, accounting for VLAN tags */
984 CSR_WRITE_4(sc, BFE_RXMAXLEN, ETHER_MAX_LEN+32);
985 CSR_WRITE_4(sc, BFE_TXMAXLEN, ETHER_MAX_LEN+32);
987 /* Set watermark XXX - magic */
988 CSR_WRITE_4(sc, BFE_TX_WMARK, 56);
991 * Initialise DMA channels
992 * - not forgetting dma addresses need to be added to BFE_PCI_DMA
994 CSR_WRITE_4(sc, BFE_DMATX_CTRL, BFE_TX_CTRL_ENABLE);
995 CSR_WRITE_4(sc, BFE_DMATX_ADDR, sc->bfe_tx_dma + BFE_PCI_DMA);
997 CSR_WRITE_4(sc, BFE_DMARX_CTRL, (BFE_RX_OFFSET << BFE_RX_CTRL_ROSHIFT) |
999 CSR_WRITE_4(sc, BFE_DMARX_ADDR, sc->bfe_rx_dma + BFE_PCI_DMA);
1006 bfe_core_disable(struct bfe_softc *sc)
1008 if ((CSR_READ_4(sc, BFE_SBTMSLOW)) & BFE_RESET)
1012 * Set reject, wait for it set, then wait for the core to stop
1013 * being busy, then set reset and reject and enable the clocks.
1015 CSR_WRITE_4(sc, BFE_SBTMSLOW, (BFE_REJECT | BFE_CLOCK));
1016 bfe_wait_bit(sc, BFE_SBTMSLOW, BFE_REJECT, 1000, 0);
1017 bfe_wait_bit(sc, BFE_SBTMSHIGH, BFE_BUSY, 1000, 1);
1018 CSR_WRITE_4(sc, BFE_SBTMSLOW, (BFE_FGC | BFE_CLOCK | BFE_REJECT |
1020 CSR_READ_4(sc, BFE_SBTMSLOW);
1022 /* Leave reset and reject set */
1023 CSR_WRITE_4(sc, BFE_SBTMSLOW, (BFE_REJECT | BFE_RESET));
1028 bfe_core_reset(struct bfe_softc *sc)
1032 /* Disable the core */
1033 bfe_core_disable(sc);
1035 /* and bring it back up */
1036 CSR_WRITE_4(sc, BFE_SBTMSLOW, (BFE_RESET | BFE_CLOCK | BFE_FGC));
1037 CSR_READ_4(sc, BFE_SBTMSLOW);
1040 /* Chip bug, clear SERR, IB and TO if they are set. */
1041 if (CSR_READ_4(sc, BFE_SBTMSHIGH) & BFE_SERR)
1042 CSR_WRITE_4(sc, BFE_SBTMSHIGH, 0);
1043 val = CSR_READ_4(sc, BFE_SBIMSTATE);
1044 if (val & (BFE_IBE | BFE_TO))
1045 CSR_WRITE_4(sc, BFE_SBIMSTATE, val & ~(BFE_IBE | BFE_TO));
1047 /* Clear reset and allow it to move through the core */
1048 CSR_WRITE_4(sc, BFE_SBTMSLOW, (BFE_CLOCK | BFE_FGC));
1049 CSR_READ_4(sc, BFE_SBTMSLOW);
1052 /* Leave the clock set */
1053 CSR_WRITE_4(sc, BFE_SBTMSLOW, BFE_CLOCK);
1054 CSR_READ_4(sc, BFE_SBTMSLOW);
1059 bfe_cam_write(struct bfe_softc *sc, u_char *data, int index)
1063 val = ((u_int32_t) data[2]) << 24;
1064 val |= ((u_int32_t) data[3]) << 16;
1065 val |= ((u_int32_t) data[4]) << 8;
1066 val |= ((u_int32_t) data[5]);
1067 CSR_WRITE_4(sc, BFE_CAM_DATA_LO, val);
1068 val = (BFE_CAM_HI_VALID |
1069 (((u_int32_t) data[0]) << 8) |
1070 (((u_int32_t) data[1])));
1071 CSR_WRITE_4(sc, BFE_CAM_DATA_HI, val);
1072 CSR_WRITE_4(sc, BFE_CAM_CTRL, (BFE_CAM_WRITE |
1073 ((u_int32_t) index << BFE_CAM_INDEX_SHIFT)));
1074 bfe_wait_bit(sc, BFE_CAM_CTRL, BFE_CAM_BUSY, 10000, 1);
1078 bfe_set_rx_mode(struct bfe_softc *sc)
1080 struct ifnet *ifp = sc->bfe_ifp;
1081 struct ifmultiaddr *ifma;
1085 val = CSR_READ_4(sc, BFE_RXCONF);
1087 if (ifp->if_flags & IFF_PROMISC)
1088 val |= BFE_RXCONF_PROMISC;
1090 val &= ~BFE_RXCONF_PROMISC;
1092 if (ifp->if_flags & IFF_BROADCAST)
1093 val &= ~BFE_RXCONF_DBCAST;
1095 val |= BFE_RXCONF_DBCAST;
1098 CSR_WRITE_4(sc, BFE_CAM_CTRL, 0);
1099 bfe_cam_write(sc, IF_LLADDR(sc->bfe_ifp), i++);
1101 if (ifp->if_flags & IFF_ALLMULTI)
1102 val |= BFE_RXCONF_ALLMULTI;
1104 val &= ~BFE_RXCONF_ALLMULTI;
1106 TAILQ_FOREACH(ifma, &ifp->if_multiaddrs, ifma_link) {
1107 if (ifma->ifma_addr->sa_family != AF_LINK)
1110 LLADDR((struct sockaddr_dl *)ifma->ifma_addr), i++);
1112 IF_ADDR_UNLOCK(ifp);
1115 CSR_WRITE_4(sc, BFE_RXCONF, val);
1116 BFE_OR(sc, BFE_CAM_CTRL, BFE_CAM_ENABLE);
1120 bfe_dma_map(void *arg, bus_dma_segment_t *segs, int nseg, int error)
1122 struct bfe_dmamap_arg *ctx;
1127 KASSERT(nseg == 1, ("%s : %d segments returned!", __func__, nseg));
1129 ctx = (struct bfe_dmamap_arg *)arg;
1130 ctx->bfe_busaddr = segs[0].ds_addr;
1134 bfe_release_resources(struct bfe_softc *sc)
1137 if (sc->bfe_intrhand != NULL)
1138 bus_teardown_intr(sc->bfe_dev, sc->bfe_irq, sc->bfe_intrhand);
1140 if (sc->bfe_irq != NULL)
1141 bus_release_resource(sc->bfe_dev, SYS_RES_IRQ, 0, sc->bfe_irq);
1143 if (sc->bfe_res != NULL)
1144 bus_release_resource(sc->bfe_dev, SYS_RES_MEMORY, PCIR_BAR(0),
1147 if (sc->bfe_ifp != NULL)
1148 if_free(sc->bfe_ifp);
1152 bfe_read_eeprom(struct bfe_softc *sc, u_int8_t *data)
1155 u_int16_t *ptr = (u_int16_t *)data;
1157 for(i = 0; i < 128; i += 2)
1158 ptr[i/2] = CSR_READ_4(sc, 4096 + i);
1162 bfe_wait_bit(struct bfe_softc *sc, u_int32_t reg, u_int32_t bit,
1163 u_long timeout, const int clear)
1167 for (i = 0; i < timeout; i++) {
1168 u_int32_t val = CSR_READ_4(sc, reg);
1170 if (clear && !(val & bit))
1172 if (!clear && (val & bit))
1177 device_printf(sc->bfe_dev,
1178 "BUG! Timeout waiting for bit %08x of register "
1179 "%x to %s.\n", bit, reg, (clear ? "clear" : "set"));
1186 bfe_readphy(struct bfe_softc *sc, u_int32_t reg, u_int32_t *val)
1191 CSR_WRITE_4(sc, BFE_EMAC_ISTAT, BFE_EMAC_INT_MII);
1192 CSR_WRITE_4(sc, BFE_MDIO_DATA, (BFE_MDIO_SB_START |
1193 (BFE_MDIO_OP_READ << BFE_MDIO_OP_SHIFT) |
1194 (sc->bfe_phyaddr << BFE_MDIO_PMD_SHIFT) |
1195 (reg << BFE_MDIO_RA_SHIFT) |
1196 (BFE_MDIO_TA_VALID << BFE_MDIO_TA_SHIFT)));
1197 err = bfe_wait_bit(sc, BFE_EMAC_ISTAT, BFE_EMAC_INT_MII, 100, 0);
1198 *val = CSR_READ_4(sc, BFE_MDIO_DATA) & BFE_MDIO_DATA_DATA;
1204 bfe_writephy(struct bfe_softc *sc, u_int32_t reg, u_int32_t val)
1208 CSR_WRITE_4(sc, BFE_EMAC_ISTAT, BFE_EMAC_INT_MII);
1209 CSR_WRITE_4(sc, BFE_MDIO_DATA, (BFE_MDIO_SB_START |
1210 (BFE_MDIO_OP_WRITE << BFE_MDIO_OP_SHIFT) |
1211 (sc->bfe_phyaddr << BFE_MDIO_PMD_SHIFT) |
1212 (reg << BFE_MDIO_RA_SHIFT) |
1213 (BFE_MDIO_TA_VALID << BFE_MDIO_TA_SHIFT) |
1214 (val & BFE_MDIO_DATA_DATA)));
1215 status = bfe_wait_bit(sc, BFE_EMAC_ISTAT, BFE_EMAC_INT_MII, 100, 0);
1221 * XXX - I think this is handled by the PHY driver, but it can't hurt to do it
1225 bfe_setupphy(struct bfe_softc *sc)
1229 /* Enable activity LED */
1230 bfe_readphy(sc, 26, &val);
1231 bfe_writephy(sc, 26, val & 0x7fff);
1232 bfe_readphy(sc, 26, &val);
1234 /* Enable traffic meter LED mode */
1235 bfe_readphy(sc, 27, &val);
1236 bfe_writephy(sc, 27, val | (1 << 6));
1242 bfe_stats_update(struct bfe_softc *sc)
1247 val = &sc->bfe_hwstats.tx_good_octets;
1248 for (reg = BFE_TX_GOOD_O; reg <= BFE_TX_PAUSE; reg += 4) {
1249 *val++ += CSR_READ_4(sc, reg);
1251 val = &sc->bfe_hwstats.rx_good_octets;
1252 for (reg = BFE_RX_GOOD_O; reg <= BFE_RX_NPAUSE; reg += 4) {
1253 *val++ += CSR_READ_4(sc, reg);
1258 bfe_txeof(struct bfe_softc *sc)
1260 struct bfe_tx_data *r;
1264 BFE_LOCK_ASSERT(sc);
1268 chipidx = CSR_READ_4(sc, BFE_DMATX_STAT) & BFE_STAT_CDMASK;
1269 chipidx /= sizeof(struct bfe_desc);
1271 i = sc->bfe_tx_cons;
1274 bus_dmamap_sync(sc->bfe_tx_tag, sc->bfe_tx_map,
1275 BUS_DMASYNC_POSTREAD | BUS_DMASYNC_POSTWRITE);
1276 /* Go through the mbufs and free those that have been transmitted */
1277 for (; i != chipidx; BFE_INC(i, BFE_TX_LIST_CNT)) {
1278 r = &sc->bfe_tx_ring[i];
1280 if (r->bfe_mbuf == NULL)
1282 bus_dmamap_sync(sc->bfe_txmbuf_tag, r->bfe_map,
1283 BUS_DMASYNC_POSTWRITE);
1284 bus_dmamap_unload(sc->bfe_txmbuf_tag, r->bfe_map);
1287 m_freem(r->bfe_mbuf);
1291 if (i != sc->bfe_tx_cons) {
1292 /* we freed up some mbufs */
1293 sc->bfe_tx_cons = i;
1294 ifp->if_drv_flags &= ~IFF_DRV_OACTIVE;
1297 if (sc->bfe_tx_cnt == 0)
1298 sc->bfe_watchdog_timer = 0;
1301 /* Pass a received packet up the stack */
1303 bfe_rxeof(struct bfe_softc *sc)
1307 struct bfe_rxheader *rxheader;
1308 struct bfe_rx_data *r;
1310 u_int32_t status, current, len, flags;
1312 BFE_LOCK_ASSERT(sc);
1313 cons = sc->bfe_rx_cons;
1314 status = CSR_READ_4(sc, BFE_DMARX_STAT);
1315 current = (status & BFE_STAT_CDMASK) / sizeof(struct bfe_desc);
1319 bus_dmamap_sync(sc->bfe_rx_tag, sc->bfe_rx_map,
1320 BUS_DMASYNC_POSTREAD | BUS_DMASYNC_POSTWRITE);
1322 for (prog = 0; current != cons; prog++,
1323 BFE_INC(cons, BFE_RX_LIST_CNT)) {
1324 r = &sc->bfe_rx_ring[cons];
1327 * Rx status should be read from mbuf such that we can't
1328 * delay bus_dmamap_sync(9). This hardware limiation
1329 * results in inefficent mbuf usage as bfe(4) couldn't
1330 * reuse mapped buffer from errored frame.
1332 if (bfe_list_newbuf(sc, cons) != 0) {
1334 bfe_discard_buf(sc, cons);
1337 rxheader = mtod(m, struct bfe_rxheader*);
1338 len = le16toh(rxheader->len);
1339 flags = le16toh(rxheader->flags);
1341 /* Remove CRC bytes. */
1342 len -= ETHER_CRC_LEN;
1344 /* flag an error and try again */
1345 if ((len > ETHER_MAX_LEN+32) || (flags & BFE_RX_FLAG_ERRORS)) {
1347 if (flags & BFE_RX_FLAG_SERR)
1348 ifp->if_collisions++;
1353 /* Make sure to skip header bytes written by hardware. */
1354 m_adj(m, BFE_RX_OFFSET);
1355 m->m_len = m->m_pkthdr.len = len;
1358 m->m_pkthdr.rcvif = ifp;
1360 (*ifp->if_input)(ifp, m);
1365 sc->bfe_rx_cons = cons;
1366 bus_dmamap_sync(sc->bfe_rx_tag, sc->bfe_rx_map,
1367 BUS_DMASYNC_PREREAD | BUS_DMASYNC_PREWRITE);
1374 struct bfe_softc *sc = xsc;
1376 u_int32_t istat, flag;
1382 istat = CSR_READ_4(sc, BFE_ISTAT);
1385 * Defer unsolicited interrupts - This is necessary because setting the
1386 * chips interrupt mask register to 0 doesn't actually stop the
1389 istat &= BFE_IMASK_DEF;
1390 CSR_WRITE_4(sc, BFE_ISTAT, istat);
1391 CSR_READ_4(sc, BFE_ISTAT);
1393 /* not expecting this interrupt, disregard it */
1394 if (istat == 0 || (ifp->if_drv_flags & IFF_DRV_RUNNING) == 0) {
1399 if (istat & BFE_ISTAT_ERRORS) {
1401 if (istat & BFE_ISTAT_DSCE) {
1402 device_printf(sc->bfe_dev, "Descriptor Error\n");
1408 if (istat & BFE_ISTAT_DPE) {
1409 device_printf(sc->bfe_dev,
1410 "Descriptor Protocol Error\n");
1416 flag = CSR_READ_4(sc, BFE_DMATX_STAT);
1417 if (flag & BFE_STAT_EMASK)
1420 flag = CSR_READ_4(sc, BFE_DMARX_STAT);
1421 if (flag & BFE_RX_FLAG_ERRORS)
1424 ifp->if_drv_flags &= ~IFF_DRV_RUNNING;
1425 bfe_init_locked(sc);
1428 /* A packet was received */
1429 if (istat & BFE_ISTAT_RX)
1432 /* A packet was sent */
1433 if (istat & BFE_ISTAT_TX)
1436 /* We have packets pending, fire them out */
1437 if (!IFQ_DRV_IS_EMPTY(&ifp->if_snd))
1438 bfe_start_locked(ifp);
1444 bfe_encap(struct bfe_softc *sc, struct mbuf **m_head)
1447 struct bfe_tx_data *r, *r1;
1450 bus_dma_segment_t txsegs[BFE_MAXTXSEGS];
1452 int error, i, nsegs;
1454 BFE_LOCK_ASSERT(sc);
1456 M_ASSERTPKTHDR((*m_head));
1458 si = cur = sc->bfe_tx_prod;
1459 r = &sc->bfe_tx_ring[cur];
1460 error = bus_dmamap_load_mbuf_sg(sc->bfe_txmbuf_tag, r->bfe_map, *m_head,
1462 if (error == EFBIG) {
1463 m = m_collapse(*m_head, M_DONTWAIT, BFE_MAXTXSEGS);
1470 error = bus_dmamap_load_mbuf_sg(sc->bfe_txmbuf_tag, r->bfe_map,
1471 *m_head, txsegs, &nsegs, 0);
1477 } else if (error != 0)
1485 if (sc->bfe_tx_cnt + nsegs > BFE_TX_LIST_CNT - 1) {
1486 bus_dmamap_unload(sc->bfe_txmbuf_tag, r->bfe_map);
1490 for (i = 0; i < nsegs; i++) {
1491 d = &sc->bfe_tx_list[cur];
1492 d->bfe_ctrl = htole32(txsegs[i].ds_len & BFE_DESC_LEN);
1493 d->bfe_ctrl |= htole32(BFE_DESC_IOC);
1494 if (cur == BFE_TX_LIST_CNT - 1)
1496 * Tell the chip to wrap to the start of
1497 * the descriptor list.
1499 d->bfe_ctrl |= htole32(BFE_DESC_EOT);
1500 /* The chip needs all addresses to be added to BFE_PCI_DMA. */
1501 d->bfe_addr = htole32(BFE_ADDR_LO(txsegs[i].ds_addr) +
1503 BFE_INC(cur, BFE_TX_LIST_CNT);
1506 /* Update producer index. */
1507 sc->bfe_tx_prod = cur;
1509 /* Set EOF on the last descriptor. */
1510 cur = (cur + BFE_TX_LIST_CNT - 1) % BFE_TX_LIST_CNT;
1511 d = &sc->bfe_tx_list[cur];
1512 d->bfe_ctrl |= htole32(BFE_DESC_EOF);
1514 /* Lastly set SOF on the first descriptor to avoid races. */
1515 d = &sc->bfe_tx_list[si];
1516 d->bfe_ctrl |= htole32(BFE_DESC_SOF);
1518 r1 = &sc->bfe_tx_ring[cur];
1520 r->bfe_map = r1->bfe_map;
1522 r1->bfe_mbuf = *m_head;
1523 sc->bfe_tx_cnt += nsegs;
1525 bus_dmamap_sync(sc->bfe_txmbuf_tag, map, BUS_DMASYNC_PREWRITE);
1531 * Set up to transmit a packet.
1534 bfe_start(struct ifnet *ifp)
1536 BFE_LOCK((struct bfe_softc *)ifp->if_softc);
1537 bfe_start_locked(ifp);
1538 BFE_UNLOCK((struct bfe_softc *)ifp->if_softc);
1542 * Set up to transmit a packet. The softc is already locked.
1545 bfe_start_locked(struct ifnet *ifp)
1547 struct bfe_softc *sc;
1548 struct mbuf *m_head;
1553 BFE_LOCK_ASSERT(sc);
1556 * Not much point trying to send if the link is down
1557 * or we have nothing to send.
1559 if ((ifp->if_drv_flags & (IFF_DRV_RUNNING | IFF_DRV_OACTIVE)) !=
1560 IFF_DRV_RUNNING || (sc->bfe_flags & BFE_FLAG_LINK) == 0)
1563 for (queued = 0; !IFQ_DRV_IS_EMPTY(&ifp->if_snd) &&
1564 sc->bfe_tx_cnt < BFE_TX_LIST_CNT - 1;) {
1565 IFQ_DRV_DEQUEUE(&ifp->if_snd, m_head);
1570 * Pack the data into the tx ring. If we dont have
1571 * enough room, let the chip drain the ring.
1573 if (bfe_encap(sc, &m_head)) {
1576 IFQ_DRV_PREPEND(&ifp->if_snd, m_head);
1577 ifp->if_drv_flags |= IFF_DRV_OACTIVE;
1584 * If there's a BPF listener, bounce a copy of this frame
1587 BPF_MTAP(ifp, m_head);
1591 bus_dmamap_sync(sc->bfe_tx_tag, sc->bfe_tx_map,
1592 BUS_DMASYNC_PREREAD | BUS_DMASYNC_PREWRITE);
1593 /* Transmit - twice due to apparent hardware bug */
1594 CSR_WRITE_4(sc, BFE_DMATX_PTR,
1595 sc->bfe_tx_prod * sizeof(struct bfe_desc));
1597 * XXX It seems the following write is not necessary
1598 * to kick Tx command. What might be required would be
1599 * a way flushing PCI posted write. Reading the register
1600 * back ensures the flush operation. In addition,
1601 * hardware will execute PCI posted write in the long
1602 * run and watchdog timer for the kick command was set
1603 * to 5 seconds. Therefore I think the second write
1604 * access is not necessary or could be replaced with
1607 CSR_WRITE_4(sc, BFE_DMATX_PTR,
1608 sc->bfe_tx_prod * sizeof(struct bfe_desc));
1611 * Set a timeout in case the chip goes out to lunch.
1613 sc->bfe_watchdog_timer = 5;
1620 BFE_LOCK((struct bfe_softc *)xsc);
1621 bfe_init_locked(xsc);
1622 BFE_UNLOCK((struct bfe_softc *)xsc);
1626 bfe_init_locked(void *xsc)
1628 struct bfe_softc *sc = (struct bfe_softc*)xsc;
1629 struct ifnet *ifp = sc->bfe_ifp;
1630 struct mii_data *mii;
1632 BFE_LOCK_ASSERT(sc);
1634 mii = device_get_softc(sc->bfe_miibus);
1636 if (ifp->if_drv_flags & IFF_DRV_RUNNING)
1642 if (bfe_list_rx_init(sc) == ENOBUFS) {
1643 device_printf(sc->bfe_dev,
1644 "%s: Not enough memory for list buffers\n", __func__);
1648 bfe_list_tx_init(sc);
1650 bfe_set_rx_mode(sc);
1652 /* Enable the chip and core */
1653 BFE_OR(sc, BFE_ENET_CTRL, BFE_ENET_ENABLE);
1654 /* Enable interrupts */
1655 CSR_WRITE_4(sc, BFE_IMASK, BFE_IMASK_DEF);
1657 /* Clear link state and change media. */
1658 sc->bfe_flags &= ~BFE_FLAG_LINK;
1661 ifp->if_drv_flags |= IFF_DRV_RUNNING;
1662 ifp->if_drv_flags &= ~IFF_DRV_OACTIVE;
1664 callout_reset(&sc->bfe_stat_co, hz, bfe_tick, sc);
1668 * Set media options.
1671 bfe_ifmedia_upd(struct ifnet *ifp)
1673 struct bfe_softc *sc;
1674 struct mii_data *mii;
1680 mii = device_get_softc(sc->bfe_miibus);
1681 if (mii->mii_instance) {
1682 struct mii_softc *miisc;
1683 for (miisc = LIST_FIRST(&mii->mii_phys); miisc != NULL;
1684 miisc = LIST_NEXT(miisc, mii_list))
1685 mii_phy_reset(miisc);
1687 error = mii_mediachg(mii);
1694 * Report current media status.
1697 bfe_ifmedia_sts(struct ifnet *ifp, struct ifmediareq *ifmr)
1699 struct bfe_softc *sc = ifp->if_softc;
1700 struct mii_data *mii;
1703 mii = device_get_softc(sc->bfe_miibus);
1705 ifmr->ifm_active = mii->mii_media_active;
1706 ifmr->ifm_status = mii->mii_media_status;
1711 bfe_ioctl(struct ifnet *ifp, u_long command, caddr_t data)
1713 struct bfe_softc *sc = ifp->if_softc;
1714 struct ifreq *ifr = (struct ifreq *) data;
1715 struct mii_data *mii;
1721 if (ifp->if_flags & IFF_UP) {
1722 if (ifp->if_drv_flags & IFF_DRV_RUNNING)
1723 bfe_set_rx_mode(sc);
1724 else if ((sc->bfe_flags & BFE_FLAG_DETACH) == 0)
1725 bfe_init_locked(sc);
1726 } else if (ifp->if_drv_flags & IFF_DRV_RUNNING)
1733 if (ifp->if_drv_flags & IFF_DRV_RUNNING)
1734 bfe_set_rx_mode(sc);
1739 mii = device_get_softc(sc->bfe_miibus);
1740 error = ifmedia_ioctl(ifp, ifr, &mii->mii_media, command);
1743 error = ether_ioctl(ifp, command, data);
1751 bfe_watchdog(struct bfe_softc *sc)
1755 BFE_LOCK_ASSERT(sc);
1757 if (sc->bfe_watchdog_timer == 0 || --sc->bfe_watchdog_timer)
1762 device_printf(sc->bfe_dev, "watchdog timeout -- resetting\n");
1765 ifp->if_drv_flags &= ~IFF_DRV_RUNNING;
1766 bfe_init_locked(sc);
1768 if (!IFQ_DRV_IS_EMPTY(&ifp->if_snd))
1769 bfe_start_locked(ifp);
1775 struct bfe_softc *sc = xsc;
1776 struct mii_data *mii;
1778 BFE_LOCK_ASSERT(sc);
1780 mii = device_get_softc(sc->bfe_miibus);
1782 bfe_stats_update(sc);
1784 callout_reset(&sc->bfe_stat_co, hz, bfe_tick, sc);
1788 * Stop the adapter and free any mbufs allocated to the
1792 bfe_stop(struct bfe_softc *sc)
1796 BFE_LOCK_ASSERT(sc);
1799 ifp->if_drv_flags &= ~(IFF_DRV_RUNNING | IFF_DRV_OACTIVE);
1800 sc->bfe_flags &= ~BFE_FLAG_LINK;
1801 callout_stop(&sc->bfe_stat_co);
1802 sc->bfe_watchdog_timer = 0;
1805 bfe_tx_ring_free(sc);
1806 bfe_rx_ring_free(sc);