2 * Copyright (c) 1997-2001 Granch, Ltd. All rights reserved.
3 * Author: Denis I.Timofeev <timofeev@granch.ru>
5 * Redistributon 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 unmodified, this list of conditions, and the following
11 * 2. Redistributions in binary form must reproduce the above copyright
12 * notice, this list of conditions and the following disclaimer in the
13 * documentation and/or other materials provided with the distribution.
15 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
16 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
17 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
18 * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
19 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
20 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
21 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
22 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
23 * LIABILITY, OR TORT (INCLUDING NEIGENCE OR OTHERWISE) ARISING IN ANY WAY
24 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
27 * $FreeBSD: src/sys/dev/sbni/if_sbni.c,v 1.1.2.4 2002/08/11 09:32:00 fjoe Exp $
28 * $DragonFly: src/sys/dev/netif/sbni/if_sbni.c,v 1.23 2005/11/28 17:13:43 dillon Exp $
32 * Device driver for Granch SBNI12 leased line adapters
34 * Revision 2.0.0 1997/08/06
35 * Initial revision by Alexey Zverev
37 * Revision 2.0.1 1997/08/11
38 * Additional internal statistics support (tx statistics)
40 * Revision 2.0.2 1997/11/05
41 * if_bpf bug has been fixed
43 * Revision 2.0.3 1998/12/20
44 * Memory leakage has been eliminated in
45 * the sbni_st and sbni_timeout routines.
47 * Revision 3.0 2000/08/10 by Yaroslav Polyakov
48 * Support for PCI cards. 4.1 modification.
50 * Revision 3.1 2000/09/12
51 * Removed extra #defines around bpf functions
53 * Revision 4.0 2000/11/23 by Denis Timofeev
54 * Completely redesigned the buffer management
56 * Revision 4.1 2001/01/21
57 * Support for PCI Dual cards and new SBNI12D-10, -11 Dual/ISA cards
59 * Written with reference to NE2000 driver developed by David Greenman.
63 #include <sys/param.h>
64 #include <sys/systm.h>
65 #include <sys/socket.h>
66 #include <sys/sockio.h>
68 #include <sys/kernel.h>
70 #include <sys/callout.h>
71 #include <sys/syslog.h>
72 #include <sys/random.h>
73 #include <sys/thread2.h>
75 #include <machine/bus.h>
77 #include <machine/resource.h>
80 #include <net/ifq_var.h>
81 #include <net/ethernet.h>
82 #include <net/if_arp.h>
85 #include "if_sbnireg.h"
86 #include "if_sbnivar.h"
90 static void sbni_init(void *);
91 static void sbni_start(struct ifnet *);
92 static int sbni_ioctl(struct ifnet *, u_long, caddr_t, struct ucred *);
93 static void sbni_watchdog(struct ifnet *);
94 static void sbni_stop(struct sbni_softc *);
95 static void handle_channel(struct sbni_softc *);
97 static void card_start(struct sbni_softc *);
98 static int recv_frame(struct sbni_softc *);
99 static void send_frame(struct sbni_softc *);
100 static int upload_data(struct sbni_softc *, u_int, u_int, u_int, u_int32_t);
101 static int skip_tail(struct sbni_softc *, u_int, u_int32_t);
102 static void interpret_ack(struct sbni_softc *, u_int);
103 static void download_data(struct sbni_softc *, u_int32_t *);
104 static void prepare_to_send(struct sbni_softc *);
105 static void drop_xmit_queue(struct sbni_softc *);
106 static int get_rx_buf(struct sbni_softc *);
107 static void indicate_pkt(struct sbni_softc *);
108 static void change_level(struct sbni_softc *);
109 static int check_fhdr(struct sbni_softc *, u_int *, u_int *,
110 u_int *, u_int *, u_int32_t *);
111 static int append_frame_to_pkt(struct sbni_softc *, u_int, u_int32_t);
112 static void timeout_change_level(struct sbni_softc *);
113 static void send_frame_header(struct sbni_softc *, u_int32_t *);
114 static void set_initial_values(struct sbni_softc *, struct sbni_flags);
116 static u_int32_t calc_crc32(u_int32_t, caddr_t, u_int);
117 static timeout_t sbni_timeout;
119 static __inline u_char sbni_inb(struct sbni_softc *, enum sbni_reg);
120 static __inline void sbni_outb(struct sbni_softc *, enum sbni_reg, u_char);
121 static __inline void sbni_insb(struct sbni_softc *, u_char *, u_int);
122 static __inline void sbni_outsb(struct sbni_softc *, u_char *, u_int);
124 DECLARE_DUMMY_MODULE(if_sbni);
126 static u_int32_t crc32tab[];
128 #ifdef SBNI_DUAL_COMPOUND
129 struct sbni_softc *sbni_headlist;
132 u_int32_t next_sbni_unit;
134 /* -------------------------------------------------------------------------- */
136 static __inline u_char
137 sbni_inb(struct sbni_softc *sc, enum sbni_reg reg)
139 return bus_space_read_1(
140 rman_get_bustag(sc->io_res),
141 rman_get_bushandle(sc->io_res),
146 sbni_outb(struct sbni_softc *sc, enum sbni_reg reg, u_char value)
149 rman_get_bustag(sc->io_res),
150 rman_get_bushandle(sc->io_res),
151 sc->io_off + reg, value);
155 sbni_insb(struct sbni_softc *sc, u_char *to, u_int len)
157 bus_space_read_multi_1(
158 rman_get_bustag(sc->io_res),
159 rman_get_bushandle(sc->io_res),
160 sc->io_off + DAT, to, len);
164 sbni_outsb(struct sbni_softc *sc, u_char *from, u_int len)
166 bus_space_write_multi_1(
167 rman_get_bustag(sc->io_res),
168 rman_get_bushandle(sc->io_res),
169 sc->io_off + DAT, from, len);
174 Valid combinations in CSR0 (for probing):
176 VALID_DECODER 0000,0011,1011,1010
181 TR_RDY TR_REQ ; 3 ; +
183 BU_EMP TR_REQ ; 5 ; +
184 BU_EMP TR_RDY ; 6 ; -
185 BU_EMP TR_RDY TR_REQ ; 7 ; +
187 RC_RDY TR_REQ ; 9 ; +
188 RC_RDY TR_RDY ; 10 ; -
189 RC_RDY TR_RDY TR_REQ ; 11 ; -
190 RC_RDY BU_EMP ; 12 ; -
191 RC_RDY BU_EMP TR_REQ ; 13 ; -
192 RC_RDY BU_EMP TR_RDY ; 14 ; -
193 RC_RDY BU_EMP TR_RDY TR_REQ ; 15 ; -
196 #define VALID_DECODER (2 + 8 + 0x10 + 0x20 + 0x80 + 0x100 + 0x200)
200 sbni_probe(struct sbni_softc *sc)
204 csr0 = sbni_inb(sc, CSR0);
205 if (csr0 != 0xff && csr0 != 0x00) {
210 if (VALID_DECODER & (1 << (csr0 >> 4)))
219 * Install interface into kernel networking data structures
222 sbni_attach(struct sbni_softc *sc, int unit, struct sbni_flags flags)
227 ifp = &sc->arpcom.ac_if;
228 sbni_outb(sc, CSR0, 0);
229 set_initial_values(sc, flags);
231 callout_init(&sc->sbni_stat_timer);
232 /* Initialize ifnet structure */
234 if_initname(ifp, "sbni", unit);
235 ifp->if_init = sbni_init;
236 ifp->if_start = sbni_start;
237 ifp->if_ioctl = sbni_ioctl;
238 ifp->if_watchdog = sbni_watchdog;
239 ifq_set_maxlen(&ifp->if_snd, IFQ_MAXLEN);
240 ifq_set_ready(&ifp->if_snd);
242 /* report real baud rate */
243 csr0 = sbni_inb(sc, CSR0);
245 (csr0 & 0x01 ? 500000 : 2000000) / (1 << flags.rate);
247 ifp->if_flags = IFF_BROADCAST | IFF_SIMPLEX | IFF_MULTICAST;
248 ether_ifattach(ifp, sc->arpcom.ac_enaddr, NULL);
250 /* device attach does transition from UNCONFIGURED to IDLE state */
252 if_printf(ifp, "speed %ld, rxl ", ifp->if_baudrate);
256 printf("%d (fixed)\n", sc->cur_rxl_index);
259 /* -------------------------------------------------------------------------- */
264 struct sbni_softc *sc =xsc;
265 struct ifnet *ifp = &sc->arpcom.ac_if;
268 * kludge to avoid multiple initialization when more than once
269 * protocols configured
271 if (ifp->if_flags & IFF_RUNNING)
275 callout_reset(&sc->sbni_stat_timer,hz / SBNI_HZ, sbni_timeout, sc);
277 ifp->if_flags |= IFF_RUNNING;
278 ifp->if_flags &= ~IFF_OACTIVE;
280 /* attempt to start output */
286 sbni_start(struct ifnet *ifp)
288 struct sbni_softc *sc = ifp->if_softc;
289 if (sc->tx_frameno == 0)
295 sbni_stop(struct sbni_softc *sc)
297 sbni_outb(sc, CSR0, 0);
301 m_freem(sc->rx_buf_p);
305 callout_stop(&sc->sbni_stat_timer);
308 /* -------------------------------------------------------------------------- */
310 /* interrupt handler */
313 * SBNI12D-10, -11/ISA boards within "common interrupt" mode could not
314 * be looked as two independent single-channel devices. Every channel seems
315 * as Ethernet interface but interrupt handler must be common. Really, first
316 * channel ("master") driver only registers the handler. In it's struct softc
317 * it has got pointer to "slave" channel's struct softc and handles that's
319 * softc of successfully attached ISA SBNI boards is linked to list.
320 * While next board driver is initialized, it scans this list. If one
321 * has found softc with same irq and ioaddr different by 4 then it assumes
322 * this board to be "master".
328 struct sbni_softc *sc;
331 sc = (struct sbni_softc *)arg;
335 if (sbni_inb(sc, CSR0) & (RC_RDY | TR_RDY)) {
339 if (sc->slave_sc && /* second channel present */
340 (sbni_inb(sc->slave_sc, CSR0) & (RC_RDY | TR_RDY))) {
341 handle_channel(sc->slave_sc);
349 handle_channel(struct sbni_softc *sc)
354 sbni_outb(sc, CSR0, (sbni_inb(sc, CSR0) & ~EN_INT) | TR_REQ);
356 sc->timer_ticks = CHANGE_LEVEL_START_TICKS;
358 csr0 = sbni_inb(sc, CSR0);
359 if ((csr0 & (RC_RDY | TR_RDY)) == 0)
362 req_ans = !(sc->state & FL_PREV_OK);
365 req_ans = recv_frame(sc);
368 * TR_RDY always equals 1 here because we have owned the marker,
369 * and we set TR_REQ when disabled interrupts
371 csr0 = sbni_inb(sc, CSR0);
372 if ((csr0 & TR_RDY) == 0 || (csr0 & RC_RDY) != 0)
373 printf("sbni: internal error!\n");
375 /* if state & FL_NEED_RESEND != 0 then tx_frameno != 0 */
376 if (req_ans || sc->tx_frameno != 0)
379 /* send the marker without any data */
380 sbni_outb(sc, CSR0, sbni_inb(sc, CSR0) & ~TR_REQ);
384 sbni_outb(sc, CSR0, sbni_inb(sc, CSR0) | EN_INT);
389 * Routine returns 1 if it need to acknoweledge received frame.
390 * Empty frame received without errors won't be acknoweledged.
394 recv_frame(struct sbni_softc *sc)
397 u_int framelen, frameno, ack;
398 u_int is_first, frame_ok;
401 if (check_fhdr(sc, &framelen, &frameno, &ack, &is_first, &crc)) {
402 frame_ok = framelen > 4 ?
403 upload_data(sc, framelen, frameno, is_first, crc) :
404 skip_tail(sc, framelen, crc);
406 interpret_ack(sc, ack);
410 sbni_outb(sc, CSR0, sbni_inb(sc, CSR0) ^ CT_ZER);
412 sc->state |= FL_PREV_OK;
414 sc->in_stats.all_rx_number++;
416 sc->state &= ~FL_PREV_OK;
418 sc->in_stats.all_rx_number++;
419 sc->in_stats.bad_rx_number++;
422 return (!frame_ok || framelen > 4);
427 send_frame(struct sbni_softc *sc)
433 if (sc->state & FL_NEED_RESEND) {
435 /* if frame was sended but not ACK'ed - resend it */
436 if (sc->trans_errors) {
438 if (sc->framelen != 0)
439 sc->in_stats.resend_tx_number++;
441 /* cannot xmit with many attempts */
446 sc->trans_errors = TR_ERROR_COUNT;
448 send_frame_header(sc, &crc);
449 sc->state |= FL_NEED_RESEND;
451 * FL_NEED_RESEND will be cleared after ACK, but if empty
452 * frame sended then in prepare_to_send next frame
457 download_data(sc, &crc);
458 sc->in_stats.all_tx_number++;
459 sc->state |= FL_WAIT_ACK;
462 sbni_outsb(sc, (u_char *)&crc, sizeof crc);
465 csr0 = sbni_inb(sc, CSR0);
466 sbni_outb(sc, CSR0, csr0 & ~TR_REQ);
468 if (sc->tx_frameno) {
469 /* next frame exists - request to send */
470 sbni_outb(sc, CSR0, csr0 | TR_REQ);
476 download_data(struct sbni_softc *sc, u_int32_t *crc_p)
480 u_int data_len, pos, slice;
482 data_p = NULL; /* initialized to avoid warn */
485 for (m = sc->tx_buf_p; m != NULL && pos < sc->pktlen; m = m->m_next) {
486 if (pos + m->m_len > sc->outpos) {
487 data_len = m->m_len - (sc->outpos - pos);
488 data_p = mtod(m, caddr_t) + (sc->outpos - pos);
501 slice = min(data_len, sc->framelen - pos);
502 sbni_outsb(sc, data_p, slice);
503 *crc_p = calc_crc32(*crc_p, data_p, slice);
506 if (data_len -= slice)
511 } while (m != NULL && m->m_len == 0);
515 data_p = mtod(m, caddr_t);
519 /* frame too short - zero padding */
521 pos = sc->framelen - pos;
523 sbni_outb(sc, DAT, 0);
524 *crc_p = CRC32(0, *crc_p);
528 } while (pos < sc->framelen);
533 upload_data(struct sbni_softc *sc, u_int framelen, u_int frameno,
534 u_int is_first, u_int32_t crc)
539 sc->wait_frameno = frameno;
543 if (sc->wait_frameno == frameno) {
545 if (sc->inppos + framelen <= ETHER_MAX_LEN) {
546 frame_ok = append_frame_to_pkt(sc, framelen, crc);
549 * if CRC is right but framelen incorrect then transmitter
550 * error was occured... drop entire packet
552 } else if ((frame_ok = skip_tail(sc, framelen, crc)) != 0) {
553 sc->wait_frameno = 0;
555 sc->arpcom.ac_if.if_ierrors++;
556 /* now skip all frames until is_first != 0 */
559 frame_ok = skip_tail(sc, framelen, crc);
561 if (is_first && !frame_ok) {
563 * Frame has been violated, but we have stored
564 * is_first already... Drop entire packet.
566 sc->wait_frameno = 0;
567 sc->arpcom.ac_if.if_ierrors++;
574 static __inline void send_complete(struct sbni_softc *);
577 send_complete(struct sbni_softc *sc)
579 m_freem(sc->tx_buf_p);
581 sc->arpcom.ac_if.if_opackets++;
586 interpret_ack(struct sbni_softc *sc, u_int ack)
588 if (ack == FRAME_SENT_OK) {
589 sc->state &= ~FL_NEED_RESEND;
591 if (sc->state & FL_WAIT_ACK) {
592 sc->outpos += sc->framelen;
594 if (--sc->tx_frameno) {
596 sc->maxframe, sc->pktlen - sc->outpos);
604 sc->state &= ~FL_WAIT_ACK;
609 * Glue received frame with previous fragments of packet.
610 * Indicate packet when last frame would be accepted.
614 append_frame_to_pkt(struct sbni_softc *sc, u_int framelen, u_int32_t crc)
618 if (sc->inppos + framelen > ETHER_MAX_LEN)
621 if (!sc->rx_buf_p && !get_rx_buf(sc))
624 p = sc->rx_buf_p->m_data + sc->inppos;
625 sbni_insb(sc, p, framelen);
626 if (calc_crc32(crc, p, framelen) != CRC32_REMAINDER)
629 sc->inppos += framelen - 4;
630 if (--sc->wait_frameno == 0) { /* last frame received */
632 sc->arpcom.ac_if.if_ipackets++;
640 * Prepare to start output on adapter.
641 * Transmitter will be actually activated when marker has been accepted.
645 prepare_to_send(struct sbni_softc *sc)
650 /* sc->tx_buf_p == NULL here! */
652 printf("sbni: memory leak!\n");
655 sc->state &= ~(FL_WAIT_ACK | FL_NEED_RESEND);
658 sc->tx_buf_p = ifq_dequeue(&sc->arpcom.ac_if.if_snd, NULL);
659 if (sc->tx_buf_p == NULL) {
660 /* nothing to transmit... */
664 sc->arpcom.ac_if.if_flags &= ~IFF_OACTIVE;
668 for (len = 0, m = sc->tx_buf_p; m; m = m->m_next)
673 m_freem(sc->tx_buf_p);
676 if (len < SBNI_MIN_LEN)
680 sc->tx_frameno = (len + sc->maxframe - 1) / sc->maxframe;
681 sc->framelen = min(len, sc->maxframe);
683 sbni_outb(sc, CSR0, sbni_inb(sc, CSR0) | TR_REQ);
684 sc->arpcom.ac_if.if_flags |= IFF_OACTIVE;
685 BPF_MTAP(&sc->arpcom.ac_if, sc->tx_buf_p);
690 drop_xmit_queue(struct sbni_softc *sc)
693 m_freem(sc->tx_buf_p);
695 sc->arpcom.ac_if.if_oerrors++;
698 ifq_purge(&sc->arpcom.ac_if.if_snd);
703 sc->state &= ~(FL_WAIT_ACK | FL_NEED_RESEND);
704 sc->arpcom.ac_if.if_flags &= ~IFF_OACTIVE;
709 send_frame_header(struct sbni_softc *sc, u_int32_t *crc_p)
716 len_field = sc->framelen + 6; /* CRC + frameno + reserved */
718 if (sc->state & FL_NEED_RESEND)
719 len_field |= FRAME_RETRY; /* non-first attempt... */
722 len_field |= FRAME_FIRST;
724 len_field |= (sc->state & FL_PREV_OK) ? FRAME_SENT_OK : FRAME_SENT_BAD;
725 sbni_outb(sc, DAT, SBNI_SIG);
727 value = (u_char)len_field;
728 sbni_outb(sc, DAT, value);
729 crc = CRC32(value, crc);
730 value = (u_char)(len_field >> 8);
731 sbni_outb(sc, DAT, value);
732 crc = CRC32(value, crc);
734 sbni_outb(sc, DAT, sc->tx_frameno);
735 crc = CRC32(sc->tx_frameno, crc);
736 sbni_outb(sc, DAT, 0);
743 * if frame tail not needed (incorrect number or received twice),
744 * it won't store, but CRC will be calculated
748 skip_tail(struct sbni_softc *sc, u_int tail_len, u_int32_t crc)
751 crc = CRC32(sbni_inb(sc, DAT), crc);
753 return (crc == CRC32_REMAINDER);
758 check_fhdr(struct sbni_softc *sc, u_int *framelen, u_int *frameno,
759 u_int *ack, u_int *is_first, u_int32_t *crc_p)
765 if (sbni_inb(sc, DAT) != SBNI_SIG)
768 value = sbni_inb(sc, DAT);
769 *framelen = (u_int)value;
770 crc = CRC32(value, crc);
771 value = sbni_inb(sc, DAT);
772 *framelen |= ((u_int)value) << 8;
773 crc = CRC32(value, crc);
775 *ack = *framelen & FRAME_ACK_MASK;
776 *is_first = (*framelen & FRAME_FIRST) != 0;
778 if ((*framelen &= FRAME_LEN_MASK) < 6 || *framelen > SBNI_MAX_FRAME - 3)
781 value = sbni_inb(sc, DAT);
782 *frameno = (u_int)value;
783 crc = CRC32(value, crc);
785 crc = CRC32(sbni_inb(sc, DAT), crc); /* reserved byte */
794 get_rx_buf(struct sbni_softc *sc)
798 MGETHDR(m, MB_DONTWAIT, MT_DATA);
800 printf("%s: cannot allocate header mbuf\n",
801 sc->arpcom.ac_if.if_xname);
806 * We always put the received packet in a single buffer -
807 * either with just an mbuf header or in a cluster attached
808 * to the header. The +2 is to compensate for the alignment
811 if (ETHER_MAX_LEN + 2 > MHLEN) {
812 /* Attach an mbuf cluster */
813 MCLGET(m, MB_DONTWAIT);
814 if ((m->m_flags & M_EXT) == 0) {
819 m->m_pkthdr.len = m->m_len = ETHER_MAX_LEN + 2;
822 * The +2 is to longword align the start of the real packet.
823 * (sizeof ether_header == 14)
824 * This is important for NFS.
833 indicate_pkt(struct sbni_softc *sc)
835 struct ifnet *ifp = &sc->arpcom.ac_if;
839 m->m_pkthdr.rcvif = ifp;
840 m->m_pkthdr.len = m->m_len = sc->inppos;
842 ifp->if_input(ifp, m);
846 /* -------------------------------------------------------------------------- */
849 * Routine checks periodically wire activity and regenerates marker if
850 * connect was inactive for a long time.
854 sbni_timeout(void *xsc)
856 struct sbni_softc *sc = xsc;
859 lwkt_serialize_enter(sc->arpcom.ac_if.if_serializer);
861 csr0 = sbni_inb(sc, CSR0);
864 if (sc->timer_ticks) {
865 if (csr0 & (RC_RDY | BU_EMP))
866 /* receiving not active */
869 sc->in_stats.timeout_number++;
871 timeout_change_level(sc);
873 sbni_outb(sc, CSR1, *(u_char *)&sc->csr1 | PR_RES);
874 csr0 = sbni_inb(sc, CSR0);
878 sbni_outb(sc, CSR0, csr0 | RC_CHK);
879 callout_reset(&sc->sbni_stat_timer, hz / SBNI_HZ, sbni_timeout, sc);
881 lwkt_serialize_exit(sc->arpcom.ac_if.if_serializer);
884 /* -------------------------------------------------------------------------- */
887 card_start(struct sbni_softc *sc)
889 sc->timer_ticks = CHANGE_LEVEL_START_TICKS;
890 sc->state &= ~(FL_WAIT_ACK | FL_NEED_RESEND);
891 sc->state |= FL_PREV_OK;
894 sc->wait_frameno = 0;
896 sbni_outb(sc, CSR1, *(u_char *)&sc->csr1 | PR_RES);
897 sbni_outb(sc, CSR0, EN_INT);
900 /* -------------------------------------------------------------------------- */
903 * Device timeout/watchdog routine. Entered if the device neglects to
904 * generate an interrupt after a transmit has been started on it.
908 sbni_watchdog(struct ifnet *ifp)
910 log(LOG_ERR, "%s: device timeout\n", ifp->if_xname);
915 static u_char rxl_tab[] = {
916 0x00, 0x01, 0x02, 0x03, 0x04, 0x05, 0x06, 0x08,
917 0x0a, 0x0c, 0x0f, 0x16, 0x18, 0x1a, 0x1c, 0x1f
920 #define SIZE_OF_TIMEOUT_RXL_TAB 4
921 static u_char timeout_rxl_tab[] = {
922 0x03, 0x05, 0x08, 0x0b
926 set_initial_values(struct sbni_softc *sc, struct sbni_flags flags)
928 if (flags.fixed_rxl) {
929 sc->delta_rxl = 0; /* disable receive level autodetection */
930 sc->cur_rxl_index = flags.rxl;
932 sc->delta_rxl = DEF_RXL_DELTA;
933 sc->cur_rxl_index = DEF_RXL;
936 sc->csr1.rate = flags.fixed_rate ? flags.rate : DEFAULT_RATE;
937 sc->csr1.rxl = rxl_tab[sc->cur_rxl_index];
938 sc->maxframe = DEFAULT_FRAME_LEN;
941 * generate Ethernet address (0x00ff01xxxxxx)
943 *(u_int16_t *) sc->arpcom.ac_enaddr = htons(0x00ff);
944 if (flags.mac_addr) {
945 *(u_int32_t *) (sc->arpcom.ac_enaddr + 2) =
946 htonl(flags.mac_addr | 0x01000000);
948 *(u_char *) (sc->arpcom.ac_enaddr + 2) = 0x01;
949 read_random_unlimited(sc->arpcom.ac_enaddr + 3, 3);
954 #ifdef SBNI_DUAL_COMPOUND
957 connect_to_master(struct sbni_softc *sc)
959 struct sbni_softc *p, *p_prev;
961 for (p = sbni_headlist, p_prev = NULL; p; p_prev = p, p = p->link) {
962 if (rman_get_start(p->io_res) == rman_get_start(sc->io_res) + 4 ||
963 rman_get_start(p->io_res) == rman_get_start(sc->io_res) - 4) {
966 p_prev->link = p->link;
968 sbni_headlist = p->link;
976 #endif /* SBNI_DUAL_COMPOUND */
979 /* Receive level auto-selection */
982 change_level(struct sbni_softc *sc)
984 if (sc->delta_rxl == 0) /* do not auto-negotiate RxL */
987 if (sc->cur_rxl_index == 0)
989 else if (sc->cur_rxl_index == 15)
991 else if (sc->cur_rxl_rcvd < sc->prev_rxl_rcvd)
992 sc->delta_rxl = -sc->delta_rxl;
994 sc->csr1.rxl = rxl_tab[sc->cur_rxl_index += sc->delta_rxl];
995 sbni_inb(sc, CSR0); /* it needed for PCI cards */
996 sbni_outb(sc, CSR1, *(u_char *)&sc->csr1);
998 sc->prev_rxl_rcvd = sc->cur_rxl_rcvd;
999 sc->cur_rxl_rcvd = 0;
1004 timeout_change_level(struct sbni_softc *sc)
1006 sc->cur_rxl_index = timeout_rxl_tab[sc->timeout_rxl];
1007 if (++sc->timeout_rxl >= 4)
1008 sc->timeout_rxl = 0;
1010 sc->csr1.rxl = rxl_tab[sc->cur_rxl_index];
1012 sbni_outb(sc, CSR1, *(u_char *)&sc->csr1);
1014 sc->prev_rxl_rcvd = sc->cur_rxl_rcvd;
1015 sc->cur_rxl_rcvd = 0;
1018 /* -------------------------------------------------------------------------- */
1021 * Process an ioctl request. This code needs some work - it looks
1026 sbni_ioctl(struct ifnet *ifp, u_long command, caddr_t data, struct ucred *cr)
1028 struct sbni_softc *sc;
1030 struct sbni_in_stats *in_stats;
1031 struct sbni_flags flags;
1035 ifr = (struct ifreq *)data;
1041 * If the interface is marked up and stopped, then start it.
1042 * If it is marked down and running, then stop it.
1044 if (ifp->if_flags & IFF_UP) {
1045 if (!(ifp->if_flags & IFF_RUNNING))
1048 if (ifp->if_flags & IFF_RUNNING) {
1050 ifp->if_flags &= ~IFF_RUNNING;
1058 * Multicast list has changed; set the hardware filter
1063 error = EAFNOSUPPORT; */
1067 if (ifr->ifr_mtu > ETHERMTU)
1070 ifp->if_mtu = ifr->ifr_mtu;
1074 * SBNI specific ioctl
1076 case SIOCGHWFLAGS: /* get flags */
1077 bcopy((caddr_t) sc->arpcom.ac_enaddr+3, (caddr_t) &flags, 3);
1078 flags.rxl = sc->cur_rxl_index;
1079 flags.rate = sc->csr1.rate;
1080 flags.fixed_rxl = (sc->delta_rxl == 0);
1081 flags.fixed_rate = 1;
1082 ifr->ifr_data = *(caddr_t*) &flags;
1086 in_stats = (struct sbni_in_stats *)ifr->ifr_data;
1087 bcopy((void *)(&(sc->in_stats)), (void *)in_stats,
1088 sizeof(struct sbni_in_stats));
1091 case SIOCSHWFLAGS: /* set flags */
1093 error = suser_cred(cr, NULL_CRED_OKAY);
1094 /* NOTE: returns EPERM if no proc */
1097 flags = *(struct sbni_flags*)&ifr->ifr_data;
1098 if (flags.fixed_rxl) {
1100 sc->cur_rxl_index = flags.rxl;
1102 sc->delta_rxl = DEF_RXL_DELTA;
1103 sc->cur_rxl_index = DEF_RXL;
1105 sc->csr1.rxl = rxl_tab[sc->cur_rxl_index];
1106 sc->csr1.rate = flags.fixed_rate ? flags.rate : DEFAULT_RATE;
1108 bcopy((caddr_t) &flags,
1109 (caddr_t) sc->arpcom.ac_enaddr+3, 3);
1111 /* Don't be afraid... */
1112 sbni_outb(sc, CSR1, *(char*)(&sc->csr1) | PR_RES);
1116 if (!(error = suser_cred(cr, NULL_CRED_OKAY))) /* root only */
1117 bzero(&sc->in_stats, sizeof(struct sbni_in_stats));
1121 error = ether_ioctl(ifp, command, data);
1127 /* -------------------------------------------------------------------------- */
1132 calc_crc32(u_int32_t crc, caddr_t p, u_int len)
1138 "xorl %%ebx, %%ebx\n"
1141 "movl $crc32tab, %%edi\n"
1148 "movl (%%esi), %%edx\n"
1152 "xorl (%%edi,%%ebx,4), %%eax\n"
1158 "xorl (%%edi,%%ebx,4), %%eax\n"
1164 "xorl (%%edi,%%ebx,4), %%eax\n"
1170 "xorl (%%edi,%%ebx,4), %%eax\n"
1182 "xorb (%%esi), %%bl\n"
1183 "xorl (%%edi,%%ebx,4), %%eax\n"
1190 "xorb 1(%%esi), %%bl\n"
1191 "xorl (%%edi,%%ebx,4), %%eax\n"
1198 "xorb 2(%%esi), %%bl\n"
1199 "xorl (%%edi,%%ebx,4), %%eax\n"
1202 : "a" (_crc), "g" (p), "g" (len)
1203 : "bx", "cx", "dx", "si", "di"
1212 calc_crc32(u_int32_t crc, caddr_t p, u_int len)
1215 crc = CRC32(*p++, crc);
1220 #endif /* ASM_CRC */
1223 static u_int32_t crc32tab[] __attribute__ ((aligned(8))) = {
1224 0xD202EF8D, 0xA505DF1B, 0x3C0C8EA1, 0x4B0BBE37,
1225 0xD56F2B94, 0xA2681B02, 0x3B614AB8, 0x4C667A2E,
1226 0xDCD967BF, 0xABDE5729, 0x32D70693, 0x45D03605,
1227 0xDBB4A3A6, 0xACB39330, 0x35BAC28A, 0x42BDF21C,
1228 0xCFB5FFE9, 0xB8B2CF7F, 0x21BB9EC5, 0x56BCAE53,
1229 0xC8D83BF0, 0xBFDF0B66, 0x26D65ADC, 0x51D16A4A,
1230 0xC16E77DB, 0xB669474D, 0x2F6016F7, 0x58672661,
1231 0xC603B3C2, 0xB1048354, 0x280DD2EE, 0x5F0AE278,
1232 0xE96CCF45, 0x9E6BFFD3, 0x0762AE69, 0x70659EFF,
1233 0xEE010B5C, 0x99063BCA, 0x000F6A70, 0x77085AE6,
1234 0xE7B74777, 0x90B077E1, 0x09B9265B, 0x7EBE16CD,
1235 0xE0DA836E, 0x97DDB3F8, 0x0ED4E242, 0x79D3D2D4,
1236 0xF4DBDF21, 0x83DCEFB7, 0x1AD5BE0D, 0x6DD28E9B,
1237 0xF3B61B38, 0x84B12BAE, 0x1DB87A14, 0x6ABF4A82,
1238 0xFA005713, 0x8D076785, 0x140E363F, 0x630906A9,
1239 0xFD6D930A, 0x8A6AA39C, 0x1363F226, 0x6464C2B0,
1240 0xA4DEAE1D, 0xD3D99E8B, 0x4AD0CF31, 0x3DD7FFA7,
1241 0xA3B36A04, 0xD4B45A92, 0x4DBD0B28, 0x3ABA3BBE,
1242 0xAA05262F, 0xDD0216B9, 0x440B4703, 0x330C7795,
1243 0xAD68E236, 0xDA6FD2A0, 0x4366831A, 0x3461B38C,
1244 0xB969BE79, 0xCE6E8EEF, 0x5767DF55, 0x2060EFC3,
1245 0xBE047A60, 0xC9034AF6, 0x500A1B4C, 0x270D2BDA,
1246 0xB7B2364B, 0xC0B506DD, 0x59BC5767, 0x2EBB67F1,
1247 0xB0DFF252, 0xC7D8C2C4, 0x5ED1937E, 0x29D6A3E8,
1248 0x9FB08ED5, 0xE8B7BE43, 0x71BEEFF9, 0x06B9DF6F,
1249 0x98DD4ACC, 0xEFDA7A5A, 0x76D32BE0, 0x01D41B76,
1250 0x916B06E7, 0xE66C3671, 0x7F6567CB, 0x0862575D,
1251 0x9606C2FE, 0xE101F268, 0x7808A3D2, 0x0F0F9344,
1252 0x82079EB1, 0xF500AE27, 0x6C09FF9D, 0x1B0ECF0B,
1253 0x856A5AA8, 0xF26D6A3E, 0x6B643B84, 0x1C630B12,
1254 0x8CDC1683, 0xFBDB2615, 0x62D277AF, 0x15D54739,
1255 0x8BB1D29A, 0xFCB6E20C, 0x65BFB3B6, 0x12B88320,
1256 0x3FBA6CAD, 0x48BD5C3B, 0xD1B40D81, 0xA6B33D17,
1257 0x38D7A8B4, 0x4FD09822, 0xD6D9C998, 0xA1DEF90E,
1258 0x3161E49F, 0x4666D409, 0xDF6F85B3, 0xA868B525,
1259 0x360C2086, 0x410B1010, 0xD80241AA, 0xAF05713C,
1260 0x220D7CC9, 0x550A4C5F, 0xCC031DE5, 0xBB042D73,
1261 0x2560B8D0, 0x52678846, 0xCB6ED9FC, 0xBC69E96A,
1262 0x2CD6F4FB, 0x5BD1C46D, 0xC2D895D7, 0xB5DFA541,
1263 0x2BBB30E2, 0x5CBC0074, 0xC5B551CE, 0xB2B26158,
1264 0x04D44C65, 0x73D37CF3, 0xEADA2D49, 0x9DDD1DDF,
1265 0x03B9887C, 0x74BEB8EA, 0xEDB7E950, 0x9AB0D9C6,
1266 0x0A0FC457, 0x7D08F4C1, 0xE401A57B, 0x930695ED,
1267 0x0D62004E, 0x7A6530D8, 0xE36C6162, 0x946B51F4,
1268 0x19635C01, 0x6E646C97, 0xF76D3D2D, 0x806A0DBB,
1269 0x1E0E9818, 0x6909A88E, 0xF000F934, 0x8707C9A2,
1270 0x17B8D433, 0x60BFE4A5, 0xF9B6B51F, 0x8EB18589,
1271 0x10D5102A, 0x67D220BC, 0xFEDB7106, 0x89DC4190,
1272 0x49662D3D, 0x3E611DAB, 0xA7684C11, 0xD06F7C87,
1273 0x4E0BE924, 0x390CD9B2, 0xA0058808, 0xD702B89E,
1274 0x47BDA50F, 0x30BA9599, 0xA9B3C423, 0xDEB4F4B5,
1275 0x40D06116, 0x37D75180, 0xAEDE003A, 0xD9D930AC,
1276 0x54D13D59, 0x23D60DCF, 0xBADF5C75, 0xCDD86CE3,
1277 0x53BCF940, 0x24BBC9D6, 0xBDB2986C, 0xCAB5A8FA,
1278 0x5A0AB56B, 0x2D0D85FD, 0xB404D447, 0xC303E4D1,
1279 0x5D677172, 0x2A6041E4, 0xB369105E, 0xC46E20C8,
1280 0x72080DF5, 0x050F3D63, 0x9C066CD9, 0xEB015C4F,
1281 0x7565C9EC, 0x0262F97A, 0x9B6BA8C0, 0xEC6C9856,
1282 0x7CD385C7, 0x0BD4B551, 0x92DDE4EB, 0xE5DAD47D,
1283 0x7BBE41DE, 0x0CB97148, 0x95B020F2, 0xE2B71064,
1284 0x6FBF1D91, 0x18B82D07, 0x81B17CBD, 0xF6B64C2B,
1285 0x68D2D988, 0x1FD5E91E, 0x86DCB8A4, 0xF1DB8832,
1286 0x616495A3, 0x1663A535, 0x8F6AF48F, 0xF86DC419,
1287 0x660951BA, 0x110E612C, 0x88073096, 0xFF000000