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 1.15 2004/07/23 07:16:28 joerg 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>
74 #include <machine/bus.h>
76 #include <machine/resource.h>
79 #include <net/ethernet.h>
80 #include <net/if_arp.h>
83 #include "if_sbnireg.h"
84 #include "if_sbnivar.h"
88 static void sbni_init(void *);
89 static void sbni_start(struct ifnet *);
90 static int sbni_ioctl(struct ifnet *, u_long, caddr_t, struct ucred *);
91 static void sbni_watchdog(struct ifnet *);
92 static void sbni_stop(struct sbni_softc *);
93 static void handle_channel(struct sbni_softc *);
95 static void card_start(struct sbni_softc *);
96 static int recv_frame(struct sbni_softc *);
97 static void send_frame(struct sbni_softc *);
98 static int upload_data(struct sbni_softc *, u_int, u_int, u_int, u_int32_t);
99 static int skip_tail(struct sbni_softc *, u_int, u_int32_t);
100 static void interpret_ack(struct sbni_softc *, u_int);
101 static void download_data(struct sbni_softc *, u_int32_t *);
102 static void prepare_to_send(struct sbni_softc *);
103 static void drop_xmit_queue(struct sbni_softc *);
104 static int get_rx_buf(struct sbni_softc *);
105 static void indicate_pkt(struct sbni_softc *);
106 static void change_level(struct sbni_softc *);
107 static int check_fhdr(struct sbni_softc *, u_int *, u_int *,
108 u_int *, u_int *, u_int32_t *);
109 static int append_frame_to_pkt(struct sbni_softc *, u_int, u_int32_t);
110 static void timeout_change_level(struct sbni_softc *);
111 static void send_frame_header(struct sbni_softc *, u_int32_t *);
112 static void set_initial_values(struct sbni_softc *, struct sbni_flags);
114 static u_int32_t calc_crc32(u_int32_t, caddr_t, u_int);
115 static timeout_t sbni_timeout;
117 static __inline u_char sbni_inb(struct sbni_softc *, enum sbni_reg);
118 static __inline void sbni_outb(struct sbni_softc *, enum sbni_reg, u_char);
119 static __inline void sbni_insb(struct sbni_softc *, u_char *, u_int);
120 static __inline void sbni_outsb(struct sbni_softc *, u_char *, u_int);
122 DECLARE_DUMMY_MODULE(if_sbni);
124 static u_int32_t crc32tab[];
126 #ifdef SBNI_DUAL_COMPOUND
127 struct sbni_softc *sbni_headlist;
130 u_int32_t next_sbni_unit;
132 /* -------------------------------------------------------------------------- */
134 static __inline u_char
135 sbni_inb(struct sbni_softc *sc, enum sbni_reg reg)
137 return bus_space_read_1(
138 rman_get_bustag(sc->io_res),
139 rman_get_bushandle(sc->io_res),
144 sbni_outb(struct sbni_softc *sc, enum sbni_reg reg, u_char value)
147 rman_get_bustag(sc->io_res),
148 rman_get_bushandle(sc->io_res),
149 sc->io_off + reg, value);
153 sbni_insb(struct sbni_softc *sc, u_char *to, u_int len)
155 bus_space_read_multi_1(
156 rman_get_bustag(sc->io_res),
157 rman_get_bushandle(sc->io_res),
158 sc->io_off + DAT, to, len);
162 sbni_outsb(struct sbni_softc *sc, u_char *from, u_int len)
164 bus_space_write_multi_1(
165 rman_get_bustag(sc->io_res),
166 rman_get_bushandle(sc->io_res),
167 sc->io_off + DAT, from, len);
172 Valid combinations in CSR0 (for probing):
174 VALID_DECODER 0000,0011,1011,1010
179 TR_RDY TR_REQ ; 3 ; +
181 BU_EMP TR_REQ ; 5 ; +
182 BU_EMP TR_RDY ; 6 ; -
183 BU_EMP TR_RDY TR_REQ ; 7 ; +
185 RC_RDY TR_REQ ; 9 ; +
186 RC_RDY TR_RDY ; 10 ; -
187 RC_RDY TR_RDY TR_REQ ; 11 ; -
188 RC_RDY BU_EMP ; 12 ; -
189 RC_RDY BU_EMP TR_REQ ; 13 ; -
190 RC_RDY BU_EMP TR_RDY ; 14 ; -
191 RC_RDY BU_EMP TR_RDY TR_REQ ; 15 ; -
194 #define VALID_DECODER (2 + 8 + 0x10 + 0x20 + 0x80 + 0x100 + 0x200)
198 sbni_probe(struct sbni_softc *sc)
202 csr0 = sbni_inb(sc, CSR0);
203 if (csr0 != 0xff && csr0 != 0x00) {
208 if (VALID_DECODER & (1 << (csr0 >> 4)))
217 * Install interface into kernel networking data structures
220 sbni_attach(struct sbni_softc *sc, int unit, struct sbni_flags flags)
225 ifp = &sc->arpcom.ac_if;
226 sbni_outb(sc, CSR0, 0);
227 set_initial_values(sc, flags);
229 callout_handle_init(&sc->wch);
230 /* Initialize ifnet structure */
232 if_initname(ifp, "sbni", unit);
233 ifp->if_init = sbni_init;
234 ifp->if_start = sbni_start;
235 ifp->if_ioctl = sbni_ioctl;
236 ifp->if_watchdog = sbni_watchdog;
237 ifp->if_snd.ifq_maxlen = IFQ_MAXLEN;
239 /* report real baud rate */
240 csr0 = sbni_inb(sc, CSR0);
242 (csr0 & 0x01 ? 500000 : 2000000) / (1 << flags.rate);
244 ifp->if_flags = IFF_BROADCAST | IFF_SIMPLEX | IFF_MULTICAST;
245 ether_ifattach(ifp, sc->arpcom.ac_enaddr);
247 /* device attach does transition from UNCONFIGURED to IDLE state */
249 if_printf(ifp, "speed %ld, rxl ", ifp->if_baudrate);
253 printf("%d (fixed)\n", sc->cur_rxl_index);
256 /* -------------------------------------------------------------------------- */
261 struct sbni_softc *sc;
265 sc = (struct sbni_softc *)xsc;
266 ifp = &sc->arpcom.ac_if;
268 /* address not known */
269 if (TAILQ_EMPTY(&ifp->if_addrhead))
273 * kludge to avoid multiple initialization when more than once
274 * protocols configured
276 if (ifp->if_flags & IFF_RUNNING)
282 sc->wch = timeout(sbni_timeout, sc, hz/SBNI_HZ);
284 ifp->if_flags |= IFF_RUNNING;
285 ifp->if_flags &= ~IFF_OACTIVE;
287 /* attempt to start output */
294 sbni_start(struct ifnet *ifp)
296 struct sbni_softc *sc = ifp->if_softc;
297 if (sc->tx_frameno == 0)
303 sbni_stop(struct sbni_softc *sc)
305 sbni_outb(sc, CSR0, 0);
309 m_freem(sc->rx_buf_p);
313 untimeout(sbni_timeout, sc, sc->wch);
314 sc->wch.callout = NULL;
317 /* -------------------------------------------------------------------------- */
319 /* interrupt handler */
322 * SBNI12D-10, -11/ISA boards within "common interrupt" mode could not
323 * be looked as two independent single-channel devices. Every channel seems
324 * as Ethernet interface but interrupt handler must be common. Really, first
325 * channel ("master") driver only registers the handler. In it's struct softc
326 * it has got pointer to "slave" channel's struct softc and handles that's
328 * softc of successfully attached ISA SBNI boards is linked to list.
329 * While next board driver is initialized, it scans this list. If one
330 * has found softc with same irq and ioaddr different by 4 then it assumes
331 * this board to be "master".
337 struct sbni_softc *sc;
340 sc = (struct sbni_softc *)arg;
344 if (sbni_inb(sc, CSR0) & (RC_RDY | TR_RDY)) {
348 if (sc->slave_sc && /* second channel present */
349 (sbni_inb(sc->slave_sc, CSR0) & (RC_RDY | TR_RDY))) {
350 handle_channel(sc->slave_sc);
358 handle_channel(struct sbni_softc *sc)
363 sbni_outb(sc, CSR0, (sbni_inb(sc, CSR0) & ~EN_INT) | TR_REQ);
365 sc->timer_ticks = CHANGE_LEVEL_START_TICKS;
367 csr0 = sbni_inb(sc, CSR0);
368 if ((csr0 & (RC_RDY | TR_RDY)) == 0)
371 req_ans = !(sc->state & FL_PREV_OK);
374 req_ans = recv_frame(sc);
377 * TR_RDY always equals 1 here because we have owned the marker,
378 * and we set TR_REQ when disabled interrupts
380 csr0 = sbni_inb(sc, CSR0);
381 if ((csr0 & TR_RDY) == 0 || (csr0 & RC_RDY) != 0)
382 printf("sbni: internal error!\n");
384 /* if state & FL_NEED_RESEND != 0 then tx_frameno != 0 */
385 if (req_ans || sc->tx_frameno != 0)
388 /* send the marker without any data */
389 sbni_outb(sc, CSR0, sbni_inb(sc, CSR0) & ~TR_REQ);
393 sbni_outb(sc, CSR0, sbni_inb(sc, CSR0) | EN_INT);
398 * Routine returns 1 if it need to acknoweledge received frame.
399 * Empty frame received without errors won't be acknoweledged.
403 recv_frame(struct sbni_softc *sc)
406 u_int framelen, frameno, ack;
407 u_int is_first, frame_ok;
410 if (check_fhdr(sc, &framelen, &frameno, &ack, &is_first, &crc)) {
411 frame_ok = framelen > 4 ?
412 upload_data(sc, framelen, frameno, is_first, crc) :
413 skip_tail(sc, framelen, crc);
415 interpret_ack(sc, ack);
419 sbni_outb(sc, CSR0, sbni_inb(sc, CSR0) ^ CT_ZER);
421 sc->state |= FL_PREV_OK;
423 sc->in_stats.all_rx_number++;
425 sc->state &= ~FL_PREV_OK;
427 sc->in_stats.all_rx_number++;
428 sc->in_stats.bad_rx_number++;
431 return (!frame_ok || framelen > 4);
436 send_frame(struct sbni_softc *sc)
442 if (sc->state & FL_NEED_RESEND) {
444 /* if frame was sended but not ACK'ed - resend it */
445 if (sc->trans_errors) {
447 if (sc->framelen != 0)
448 sc->in_stats.resend_tx_number++;
450 /* cannot xmit with many attempts */
455 sc->trans_errors = TR_ERROR_COUNT;
457 send_frame_header(sc, &crc);
458 sc->state |= FL_NEED_RESEND;
460 * FL_NEED_RESEND will be cleared after ACK, but if empty
461 * frame sended then in prepare_to_send next frame
466 download_data(sc, &crc);
467 sc->in_stats.all_tx_number++;
468 sc->state |= FL_WAIT_ACK;
471 sbni_outsb(sc, (u_char *)&crc, sizeof crc);
474 csr0 = sbni_inb(sc, CSR0);
475 sbni_outb(sc, CSR0, csr0 & ~TR_REQ);
477 if (sc->tx_frameno) {
478 /* next frame exists - request to send */
479 sbni_outb(sc, CSR0, csr0 | TR_REQ);
485 download_data(struct sbni_softc *sc, u_int32_t *crc_p)
489 u_int data_len, pos, slice;
491 data_p = NULL; /* initialized to avoid warn */
494 for (m = sc->tx_buf_p; m != NULL && pos < sc->pktlen; m = m->m_next) {
495 if (pos + m->m_len > sc->outpos) {
496 data_len = m->m_len - (sc->outpos - pos);
497 data_p = mtod(m, caddr_t) + (sc->outpos - pos);
510 slice = min(data_len, sc->framelen - pos);
511 sbni_outsb(sc, data_p, slice);
512 *crc_p = calc_crc32(*crc_p, data_p, slice);
515 if (data_len -= slice)
520 } while (m != NULL && m->m_len == 0);
524 data_p = mtod(m, caddr_t);
528 /* frame too short - zero padding */
530 pos = sc->framelen - pos;
532 sbni_outb(sc, DAT, 0);
533 *crc_p = CRC32(0, *crc_p);
537 } while (pos < sc->framelen);
542 upload_data(struct sbni_softc *sc, u_int framelen, u_int frameno,
543 u_int is_first, u_int32_t crc)
548 sc->wait_frameno = frameno;
552 if (sc->wait_frameno == frameno) {
554 if (sc->inppos + framelen <= ETHER_MAX_LEN) {
555 frame_ok = append_frame_to_pkt(sc, framelen, crc);
558 * if CRC is right but framelen incorrect then transmitter
559 * error was occured... drop entire packet
561 } else if ((frame_ok = skip_tail(sc, framelen, crc)) != 0) {
562 sc->wait_frameno = 0;
564 sc->arpcom.ac_if.if_ierrors++;
565 /* now skip all frames until is_first != 0 */
568 frame_ok = skip_tail(sc, framelen, crc);
570 if (is_first && !frame_ok) {
572 * Frame has been violated, but we have stored
573 * is_first already... Drop entire packet.
575 sc->wait_frameno = 0;
576 sc->arpcom.ac_if.if_ierrors++;
583 static __inline void send_complete(struct sbni_softc *);
586 send_complete(struct sbni_softc *sc)
588 m_freem(sc->tx_buf_p);
590 sc->arpcom.ac_if.if_opackets++;
595 interpret_ack(struct sbni_softc *sc, u_int ack)
597 if (ack == FRAME_SENT_OK) {
598 sc->state &= ~FL_NEED_RESEND;
600 if (sc->state & FL_WAIT_ACK) {
601 sc->outpos += sc->framelen;
603 if (--sc->tx_frameno) {
605 sc->maxframe, sc->pktlen - sc->outpos);
613 sc->state &= ~FL_WAIT_ACK;
618 * Glue received frame with previous fragments of packet.
619 * Indicate packet when last frame would be accepted.
623 append_frame_to_pkt(struct sbni_softc *sc, u_int framelen, u_int32_t crc)
627 if (sc->inppos + framelen > ETHER_MAX_LEN)
630 if (!sc->rx_buf_p && !get_rx_buf(sc))
633 p = sc->rx_buf_p->m_data + sc->inppos;
634 sbni_insb(sc, p, framelen);
635 if (calc_crc32(crc, p, framelen) != CRC32_REMAINDER)
638 sc->inppos += framelen - 4;
639 if (--sc->wait_frameno == 0) { /* last frame received */
641 sc->arpcom.ac_if.if_ipackets++;
649 * Prepare to start output on adapter. Current priority must be set to splimp
650 * before this routine is called.
651 * Transmitter will be actually activated when marker has been accepted.
655 prepare_to_send(struct sbni_softc *sc)
660 /* sc->tx_buf_p == NULL here! */
662 printf("sbni: memory leak!\n");
665 sc->state &= ~(FL_WAIT_ACK | FL_NEED_RESEND);
668 IF_DEQUEUE(&sc->arpcom.ac_if.if_snd, sc->tx_buf_p);
670 /* nothing to transmit... */
674 sc->arpcom.ac_if.if_flags &= ~IFF_OACTIVE;
678 for (len = 0, m = sc->tx_buf_p; m; m = m->m_next)
683 m_freem(sc->tx_buf_p);
686 if (len < SBNI_MIN_LEN)
690 sc->tx_frameno = (len + sc->maxframe - 1) / sc->maxframe;
691 sc->framelen = min(len, sc->maxframe);
693 sbni_outb(sc, CSR0, sbni_inb(sc, CSR0) | TR_REQ);
694 sc->arpcom.ac_if.if_flags |= IFF_OACTIVE;
695 if (sc->arpcom.ac_if.if_bpf)
696 bpf_mtap(&sc->arpcom.ac_if, sc->tx_buf_p);
701 drop_xmit_queue(struct sbni_softc *sc)
706 m_freem(sc->tx_buf_p);
708 sc->arpcom.ac_if.if_oerrors++;
712 IF_DEQUEUE(&sc->arpcom.ac_if.if_snd, m);
716 sc->arpcom.ac_if.if_oerrors++;
722 sc->state &= ~(FL_WAIT_ACK | FL_NEED_RESEND);
723 sc->arpcom.ac_if.if_flags &= ~IFF_OACTIVE;
728 send_frame_header(struct sbni_softc *sc, u_int32_t *crc_p)
735 len_field = sc->framelen + 6; /* CRC + frameno + reserved */
737 if (sc->state & FL_NEED_RESEND)
738 len_field |= FRAME_RETRY; /* non-first attempt... */
741 len_field |= FRAME_FIRST;
743 len_field |= (sc->state & FL_PREV_OK) ? FRAME_SENT_OK : FRAME_SENT_BAD;
744 sbni_outb(sc, DAT, SBNI_SIG);
746 value = (u_char)len_field;
747 sbni_outb(sc, DAT, value);
748 crc = CRC32(value, crc);
749 value = (u_char)(len_field >> 8);
750 sbni_outb(sc, DAT, value);
751 crc = CRC32(value, crc);
753 sbni_outb(sc, DAT, sc->tx_frameno);
754 crc = CRC32(sc->tx_frameno, crc);
755 sbni_outb(sc, DAT, 0);
762 * if frame tail not needed (incorrect number or received twice),
763 * it won't store, but CRC will be calculated
767 skip_tail(struct sbni_softc *sc, u_int tail_len, u_int32_t crc)
770 crc = CRC32(sbni_inb(sc, DAT), crc);
772 return (crc == CRC32_REMAINDER);
777 check_fhdr(struct sbni_softc *sc, u_int *framelen, u_int *frameno,
778 u_int *ack, u_int *is_first, u_int32_t *crc_p)
784 if (sbni_inb(sc, DAT) != SBNI_SIG)
787 value = sbni_inb(sc, DAT);
788 *framelen = (u_int)value;
789 crc = CRC32(value, crc);
790 value = sbni_inb(sc, DAT);
791 *framelen |= ((u_int)value) << 8;
792 crc = CRC32(value, crc);
794 *ack = *framelen & FRAME_ACK_MASK;
795 *is_first = (*framelen & FRAME_FIRST) != 0;
797 if ((*framelen &= FRAME_LEN_MASK) < 6 || *framelen > SBNI_MAX_FRAME - 3)
800 value = sbni_inb(sc, DAT);
801 *frameno = (u_int)value;
802 crc = CRC32(value, crc);
804 crc = CRC32(sbni_inb(sc, DAT), crc); /* reserved byte */
813 get_rx_buf(struct sbni_softc *sc)
817 MGETHDR(m, MB_DONTWAIT, MT_DATA);
819 printf("%s: cannot allocate header mbuf\n",
820 sc->arpcom.ac_if.if_xname);
825 * We always put the received packet in a single buffer -
826 * either with just an mbuf header or in a cluster attached
827 * to the header. The +2 is to compensate for the alignment
830 if (ETHER_MAX_LEN + 2 > MHLEN) {
831 /* Attach an mbuf cluster */
832 MCLGET(m, MB_DONTWAIT);
833 if ((m->m_flags & M_EXT) == 0) {
838 m->m_pkthdr.len = m->m_len = ETHER_MAX_LEN + 2;
841 * The +2 is to longword align the start of the real packet.
842 * (sizeof ether_header == 14)
843 * This is important for NFS.
852 indicate_pkt(struct sbni_softc *sc)
854 struct ifnet *ifp = &sc->arpcom.ac_if;
858 m->m_pkthdr.rcvif = ifp;
859 m->m_pkthdr.len = m->m_len = sc->inppos;
861 (*ifp->if_input)(ifp, m);
865 /* -------------------------------------------------------------------------- */
868 * Routine checks periodically wire activity and regenerates marker if
869 * connect was inactive for a long time.
873 sbni_timeout(void *xsc)
875 struct sbni_softc *sc;
879 sc = (struct sbni_softc *)xsc;
882 csr0 = sbni_inb(sc, CSR0);
885 if (sc->timer_ticks) {
886 if (csr0 & (RC_RDY | BU_EMP))
887 /* receiving not active */
890 sc->in_stats.timeout_number++;
892 timeout_change_level(sc);
894 sbni_outb(sc, CSR1, *(u_char *)&sc->csr1 | PR_RES);
895 csr0 = sbni_inb(sc, CSR0);
899 sbni_outb(sc, CSR0, csr0 | RC_CHK);
900 sc->wch = timeout(sbni_timeout, sc, hz/SBNI_HZ);
904 /* -------------------------------------------------------------------------- */
907 card_start(struct sbni_softc *sc)
909 sc->timer_ticks = CHANGE_LEVEL_START_TICKS;
910 sc->state &= ~(FL_WAIT_ACK | FL_NEED_RESEND);
911 sc->state |= FL_PREV_OK;
914 sc->wait_frameno = 0;
916 sbni_outb(sc, CSR1, *(u_char *)&sc->csr1 | PR_RES);
917 sbni_outb(sc, CSR0, EN_INT);
920 /* -------------------------------------------------------------------------- */
923 * Device timeout/watchdog routine. Entered if the device neglects to
924 * generate an interrupt after a transmit has been started on it.
928 sbni_watchdog(struct ifnet *ifp)
930 log(LOG_ERR, "%s: device timeout\n", ifp->if_xname);
935 static u_char rxl_tab[] = {
936 0x00, 0x01, 0x02, 0x03, 0x04, 0x05, 0x06, 0x08,
937 0x0a, 0x0c, 0x0f, 0x16, 0x18, 0x1a, 0x1c, 0x1f
940 #define SIZE_OF_TIMEOUT_RXL_TAB 4
941 static u_char timeout_rxl_tab[] = {
942 0x03, 0x05, 0x08, 0x0b
946 set_initial_values(struct sbni_softc *sc, struct sbni_flags flags)
948 if (flags.fixed_rxl) {
949 sc->delta_rxl = 0; /* disable receive level autodetection */
950 sc->cur_rxl_index = flags.rxl;
952 sc->delta_rxl = DEF_RXL_DELTA;
953 sc->cur_rxl_index = DEF_RXL;
956 sc->csr1.rate = flags.fixed_rate ? flags.rate : DEFAULT_RATE;
957 sc->csr1.rxl = rxl_tab[sc->cur_rxl_index];
958 sc->maxframe = DEFAULT_FRAME_LEN;
961 * generate Ethernet address (0x00ff01xxxxxx)
963 *(u_int16_t *) sc->arpcom.ac_enaddr = htons(0x00ff);
964 if (flags.mac_addr) {
965 *(u_int32_t *) (sc->arpcom.ac_enaddr + 2) =
966 htonl(flags.mac_addr | 0x01000000);
968 *(u_char *) (sc->arpcom.ac_enaddr + 2) = 0x01;
969 read_random_unlimited(sc->arpcom.ac_enaddr + 3, 3);
974 #ifdef SBNI_DUAL_COMPOUND
977 connect_to_master(struct sbni_softc *sc)
979 struct sbni_softc *p, *p_prev;
981 for (p = sbni_headlist, p_prev = NULL; p; p_prev = p, p = p->link) {
982 if (rman_get_start(p->io_res) == rman_get_start(sc->io_res) + 4 ||
983 rman_get_start(p->io_res) == rman_get_start(sc->io_res) - 4) {
986 p_prev->link = p->link;
988 sbni_headlist = p->link;
996 #endif /* SBNI_DUAL_COMPOUND */
999 /* Receive level auto-selection */
1002 change_level(struct sbni_softc *sc)
1004 if (sc->delta_rxl == 0) /* do not auto-negotiate RxL */
1007 if (sc->cur_rxl_index == 0)
1009 else if (sc->cur_rxl_index == 15)
1011 else if (sc->cur_rxl_rcvd < sc->prev_rxl_rcvd)
1012 sc->delta_rxl = -sc->delta_rxl;
1014 sc->csr1.rxl = rxl_tab[sc->cur_rxl_index += sc->delta_rxl];
1015 sbni_inb(sc, CSR0); /* it needed for PCI cards */
1016 sbni_outb(sc, CSR1, *(u_char *)&sc->csr1);
1018 sc->prev_rxl_rcvd = sc->cur_rxl_rcvd;
1019 sc->cur_rxl_rcvd = 0;
1024 timeout_change_level(struct sbni_softc *sc)
1026 sc->cur_rxl_index = timeout_rxl_tab[sc->timeout_rxl];
1027 if (++sc->timeout_rxl >= 4)
1028 sc->timeout_rxl = 0;
1030 sc->csr1.rxl = rxl_tab[sc->cur_rxl_index];
1032 sbni_outb(sc, CSR1, *(u_char *)&sc->csr1);
1034 sc->prev_rxl_rcvd = sc->cur_rxl_rcvd;
1035 sc->cur_rxl_rcvd = 0;
1038 /* -------------------------------------------------------------------------- */
1041 * Process an ioctl request. This code needs some work - it looks
1046 sbni_ioctl(struct ifnet *ifp, u_long command, caddr_t data, struct ucred *cr)
1048 struct sbni_softc *sc;
1050 struct sbni_in_stats *in_stats;
1051 struct sbni_flags flags;
1055 ifr = (struct ifreq *)data;
1063 ether_ioctl(ifp, command, data);
1068 * If the interface is marked up and stopped, then start it.
1069 * If it is marked down and running, then stop it.
1071 if (ifp->if_flags & IFF_UP) {
1072 if (!(ifp->if_flags & IFF_RUNNING))
1075 if (ifp->if_flags & IFF_RUNNING) {
1077 ifp->if_flags &= ~IFF_RUNNING;
1085 * Multicast list has changed; set the hardware filter
1090 error = EAFNOSUPPORT; */
1094 if (ifr->ifr_mtu > ETHERMTU)
1097 ifp->if_mtu = ifr->ifr_mtu;
1101 * SBNI specific ioctl
1103 case SIOCGHWFLAGS: /* get flags */
1104 bcopy((caddr_t) sc->arpcom.ac_enaddr+3, (caddr_t) &flags, 3);
1105 flags.rxl = sc->cur_rxl_index;
1106 flags.rate = sc->csr1.rate;
1107 flags.fixed_rxl = (sc->delta_rxl == 0);
1108 flags.fixed_rate = 1;
1109 ifr->ifr_data = *(caddr_t*) &flags;
1113 in_stats = (struct sbni_in_stats *)ifr->ifr_data;
1114 bcopy((void *)(&(sc->in_stats)), (void *)in_stats,
1115 sizeof(struct sbni_in_stats));
1118 case SIOCSHWFLAGS: /* set flags */
1120 error = suser_cred(cr, NULL_CRED_OKAY);
1121 /* NOTE: returns EPERM if no proc */
1124 flags = *(struct sbni_flags*)&ifr->ifr_data;
1125 if (flags.fixed_rxl) {
1127 sc->cur_rxl_index = flags.rxl;
1129 sc->delta_rxl = DEF_RXL_DELTA;
1130 sc->cur_rxl_index = DEF_RXL;
1132 sc->csr1.rxl = rxl_tab[sc->cur_rxl_index];
1133 sc->csr1.rate = flags.fixed_rate ? flags.rate : DEFAULT_RATE;
1135 bcopy((caddr_t) &flags,
1136 (caddr_t) sc->arpcom.ac_enaddr+3, 3);
1138 /* Don't be afraid... */
1139 sbni_outb(sc, CSR1, *(char*)(&sc->csr1) | PR_RES);
1143 if (!(error = suser_cred(cr, NULL_CRED_OKAY))) /* root only */
1144 bzero(&sc->in_stats, sizeof(struct sbni_in_stats));
1155 /* -------------------------------------------------------------------------- */
1160 calc_crc32(u_int32_t crc, caddr_t p, u_int len)
1166 "xorl %%ebx, %%ebx\n"
1169 "movl $crc32tab, %%edi\n"
1176 "movl (%%esi), %%edx\n"
1180 "xorl (%%edi,%%ebx,4), %%eax\n"
1186 "xorl (%%edi,%%ebx,4), %%eax\n"
1192 "xorl (%%edi,%%ebx,4), %%eax\n"
1198 "xorl (%%edi,%%ebx,4), %%eax\n"
1210 "xorb (%%esi), %%bl\n"
1211 "xorl (%%edi,%%ebx,4), %%eax\n"
1218 "xorb 1(%%esi), %%bl\n"
1219 "xorl (%%edi,%%ebx,4), %%eax\n"
1226 "xorb 2(%%esi), %%bl\n"
1227 "xorl (%%edi,%%ebx,4), %%eax\n"
1230 : "a" (_crc), "g" (p), "g" (len)
1231 : "bx", "cx", "dx", "si", "di"
1240 calc_crc32(u_int32_t crc, caddr_t p, u_int len)
1243 crc = CRC32(*p++, crc);
1248 #endif /* ASM_CRC */
1251 static u_int32_t crc32tab[] __attribute__ ((aligned(8))) = {
1252 0xD202EF8D, 0xA505DF1B, 0x3C0C8EA1, 0x4B0BBE37,
1253 0xD56F2B94, 0xA2681B02, 0x3B614AB8, 0x4C667A2E,
1254 0xDCD967BF, 0xABDE5729, 0x32D70693, 0x45D03605,
1255 0xDBB4A3A6, 0xACB39330, 0x35BAC28A, 0x42BDF21C,
1256 0xCFB5FFE9, 0xB8B2CF7F, 0x21BB9EC5, 0x56BCAE53,
1257 0xC8D83BF0, 0xBFDF0B66, 0x26D65ADC, 0x51D16A4A,
1258 0xC16E77DB, 0xB669474D, 0x2F6016F7, 0x58672661,
1259 0xC603B3C2, 0xB1048354, 0x280DD2EE, 0x5F0AE278,
1260 0xE96CCF45, 0x9E6BFFD3, 0x0762AE69, 0x70659EFF,
1261 0xEE010B5C, 0x99063BCA, 0x000F6A70, 0x77085AE6,
1262 0xE7B74777, 0x90B077E1, 0x09B9265B, 0x7EBE16CD,
1263 0xE0DA836E, 0x97DDB3F8, 0x0ED4E242, 0x79D3D2D4,
1264 0xF4DBDF21, 0x83DCEFB7, 0x1AD5BE0D, 0x6DD28E9B,
1265 0xF3B61B38, 0x84B12BAE, 0x1DB87A14, 0x6ABF4A82,
1266 0xFA005713, 0x8D076785, 0x140E363F, 0x630906A9,
1267 0xFD6D930A, 0x8A6AA39C, 0x1363F226, 0x6464C2B0,
1268 0xA4DEAE1D, 0xD3D99E8B, 0x4AD0CF31, 0x3DD7FFA7,
1269 0xA3B36A04, 0xD4B45A92, 0x4DBD0B28, 0x3ABA3BBE,
1270 0xAA05262F, 0xDD0216B9, 0x440B4703, 0x330C7795,
1271 0xAD68E236, 0xDA6FD2A0, 0x4366831A, 0x3461B38C,
1272 0xB969BE79, 0xCE6E8EEF, 0x5767DF55, 0x2060EFC3,
1273 0xBE047A60, 0xC9034AF6, 0x500A1B4C, 0x270D2BDA,
1274 0xB7B2364B, 0xC0B506DD, 0x59BC5767, 0x2EBB67F1,
1275 0xB0DFF252, 0xC7D8C2C4, 0x5ED1937E, 0x29D6A3E8,
1276 0x9FB08ED5, 0xE8B7BE43, 0x71BEEFF9, 0x06B9DF6F,
1277 0x98DD4ACC, 0xEFDA7A5A, 0x76D32BE0, 0x01D41B76,
1278 0x916B06E7, 0xE66C3671, 0x7F6567CB, 0x0862575D,
1279 0x9606C2FE, 0xE101F268, 0x7808A3D2, 0x0F0F9344,
1280 0x82079EB1, 0xF500AE27, 0x6C09FF9D, 0x1B0ECF0B,
1281 0x856A5AA8, 0xF26D6A3E, 0x6B643B84, 0x1C630B12,
1282 0x8CDC1683, 0xFBDB2615, 0x62D277AF, 0x15D54739,
1283 0x8BB1D29A, 0xFCB6E20C, 0x65BFB3B6, 0x12B88320,
1284 0x3FBA6CAD, 0x48BD5C3B, 0xD1B40D81, 0xA6B33D17,
1285 0x38D7A8B4, 0x4FD09822, 0xD6D9C998, 0xA1DEF90E,
1286 0x3161E49F, 0x4666D409, 0xDF6F85B3, 0xA868B525,
1287 0x360C2086, 0x410B1010, 0xD80241AA, 0xAF05713C,
1288 0x220D7CC9, 0x550A4C5F, 0xCC031DE5, 0xBB042D73,
1289 0x2560B8D0, 0x52678846, 0xCB6ED9FC, 0xBC69E96A,
1290 0x2CD6F4FB, 0x5BD1C46D, 0xC2D895D7, 0xB5DFA541,
1291 0x2BBB30E2, 0x5CBC0074, 0xC5B551CE, 0xB2B26158,
1292 0x04D44C65, 0x73D37CF3, 0xEADA2D49, 0x9DDD1DDF,
1293 0x03B9887C, 0x74BEB8EA, 0xEDB7E950, 0x9AB0D9C6,
1294 0x0A0FC457, 0x7D08F4C1, 0xE401A57B, 0x930695ED,
1295 0x0D62004E, 0x7A6530D8, 0xE36C6162, 0x946B51F4,
1296 0x19635C01, 0x6E646C97, 0xF76D3D2D, 0x806A0DBB,
1297 0x1E0E9818, 0x6909A88E, 0xF000F934, 0x8707C9A2,
1298 0x17B8D433, 0x60BFE4A5, 0xF9B6B51F, 0x8EB18589,
1299 0x10D5102A, 0x67D220BC, 0xFEDB7106, 0x89DC4190,
1300 0x49662D3D, 0x3E611DAB, 0xA7684C11, 0xD06F7C87,
1301 0x4E0BE924, 0x390CD9B2, 0xA0058808, 0xD702B89E,
1302 0x47BDA50F, 0x30BA9599, 0xA9B3C423, 0xDEB4F4B5,
1303 0x40D06116, 0x37D75180, 0xAEDE003A, 0xD9D930AC,
1304 0x54D13D59, 0x23D60DCF, 0xBADF5C75, 0xCDD86CE3,
1305 0x53BCF940, 0x24BBC9D6, 0xBDB2986C, 0xCAB5A8FA,
1306 0x5A0AB56B, 0x2D0D85FD, 0xB404D447, 0xC303E4D1,
1307 0x5D677172, 0x2A6041E4, 0xB369105E, 0xC46E20C8,
1308 0x72080DF5, 0x050F3D63, 0x9C066CD9, 0xEB015C4F,
1309 0x7565C9EC, 0x0262F97A, 0x9B6BA8C0, 0xEC6C9856,
1310 0x7CD385C7, 0x0BD4B551, 0x92DDE4EB, 0xE5DAD47D,
1311 0x7BBE41DE, 0x0CB97148, 0x95B020F2, 0xE2B71064,
1312 0x6FBF1D91, 0x18B82D07, 0x81B17CBD, 0xF6B64C2B,
1313 0x68D2D988, 0x1FD5E91E, 0x86DCB8A4, 0xF1DB8832,
1314 0x616495A3, 0x1663A535, 0x8F6AF48F, 0xF86DC419,
1315 0x660951BA, 0x110E612C, 0x88073096, 0xFF000000