/* * Copyright (c) 1997-2001 Granch, Ltd. All rights reserved. * Author: Denis I.Timofeev * * Redistributon and use in source and binary forms, with or without * modification, are permitted provided that the following conditions * are met: * 1. Redistributions of source code must retain the above copyright * notice unmodified, this list of conditions, and the following * disclaimer. * 2. Redistributions in binary form must reproduce the above copyright * notice, this list of conditions and the following disclaimer in the * documentation and/or other materials provided with the distribution. * * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT * LIABILITY, OR TORT (INCLUDING NEIGENCE OR OTHERWISE) ARISING IN ANY WAY * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF * SUCH DAMAGE. * * $FreeBSD: src/sys/dev/sbni/if_sbni.c,v 1.1.2.4 2002/08/11 09:32:00 fjoe Exp $ */ /* * Device driver for Granch SBNI12 leased line adapters * * Revision 2.0.0 1997/08/06 * Initial revision by Alexey Zverev * * Revision 2.0.1 1997/08/11 * Additional internal statistics support (tx statistics) * * Revision 2.0.2 1997/11/05 * if_bpf bug has been fixed * * Revision 2.0.3 1998/12/20 * Memory leakage has been eliminated in * the sbni_st and sbni_timeout routines. * * Revision 3.0 2000/08/10 by Yaroslav Polyakov * Support for PCI cards. 4.1 modification. * * Revision 3.1 2000/09/12 * Removed extra #defines around bpf functions * * Revision 4.0 2000/11/23 by Denis Timofeev * Completely redesigned the buffer management * * Revision 4.1 2001/01/21 * Support for PCI Dual cards and new SBNI12D-10, -11 Dual/ISA cards * * Written with reference to NE2000 driver developed by David Greenman. */ #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include "if_sbnireg.h" #include "if_sbnivar.h" #ifdef __i386__ #define ASM_CRC 1 #endif static void sbni_init(void *); static void sbni_start(struct ifnet *); static int sbni_ioctl(struct ifnet *, u_long, caddr_t, struct ucred *); static void sbni_watchdog(struct ifnet *); static void sbni_stop(struct sbni_softc *); static void handle_channel(struct sbni_softc *); static void card_start(struct sbni_softc *); static int recv_frame(struct sbni_softc *); static void send_frame(struct sbni_softc *); static int upload_data(struct sbni_softc *, u_int, u_int, u_int, u_int32_t); static int skip_tail(struct sbni_softc *, u_int, u_int32_t); static void interpret_ack(struct sbni_softc *, u_int); static void download_data(struct sbni_softc *, u_int32_t *); static void prepare_to_send(struct sbni_softc *); static void drop_xmit_queue(struct sbni_softc *); static int get_rx_buf(struct sbni_softc *); static void indicate_pkt(struct sbni_softc *); static void change_level(struct sbni_softc *); static int check_fhdr(struct sbni_softc *, u_int *, u_int *, u_int *, u_int *, u_int32_t *); static int append_frame_to_pkt(struct sbni_softc *, u_int, u_int32_t); static void timeout_change_level(struct sbni_softc *); static void send_frame_header(struct sbni_softc *, u_int32_t *); static void set_initial_values(struct sbni_softc *, struct sbni_flags); static u_int32_t calc_crc32(u_int32_t, caddr_t, u_int); static timeout_t sbni_timeout; static __inline u_char sbni_inb(struct sbni_softc *, enum sbni_reg); static __inline void sbni_outb(struct sbni_softc *, enum sbni_reg, u_char); static __inline void sbni_insb(struct sbni_softc *, u_char *, u_int); static __inline void sbni_outsb(struct sbni_softc *, u_char *, u_int); DECLARE_DUMMY_MODULE(if_sbni); static u_int32_t crc32tab[]; #ifdef SBNI_DUAL_COMPOUND struct sbni_softc *sbni_headlist; #endif u_int32_t next_sbni_unit; /* -------------------------------------------------------------------------- */ static __inline u_char sbni_inb(struct sbni_softc *sc, enum sbni_reg reg) { return bus_space_read_1( rman_get_bustag(sc->io_res), rman_get_bushandle(sc->io_res), sc->io_off + reg); } static __inline void sbni_outb(struct sbni_softc *sc, enum sbni_reg reg, u_char value) { bus_space_write_1( rman_get_bustag(sc->io_res), rman_get_bushandle(sc->io_res), sc->io_off + reg, value); } static __inline void sbni_insb(struct sbni_softc *sc, u_char *to, u_int len) { bus_space_read_multi_1( rman_get_bustag(sc->io_res), rman_get_bushandle(sc->io_res), sc->io_off + DAT, to, len); } static __inline void sbni_outsb(struct sbni_softc *sc, u_char *from, u_int len) { bus_space_write_multi_1( rman_get_bustag(sc->io_res), rman_get_bushandle(sc->io_res), sc->io_off + DAT, from, len); } /* Valid combinations in CSR0 (for probing): VALID_DECODER 0000,0011,1011,1010 ; 0 ; - TR_REQ ; 1 ; + TR_RDY ; 2 ; - TR_RDY TR_REQ ; 3 ; + BU_EMP ; 4 ; + BU_EMP TR_REQ ; 5 ; + BU_EMP TR_RDY ; 6 ; - BU_EMP TR_RDY TR_REQ ; 7 ; + RC_RDY ; 8 ; + RC_RDY TR_REQ ; 9 ; + RC_RDY TR_RDY ; 10 ; - RC_RDY TR_RDY TR_REQ ; 11 ; - RC_RDY BU_EMP ; 12 ; - RC_RDY BU_EMP TR_REQ ; 13 ; - RC_RDY BU_EMP TR_RDY ; 14 ; - RC_RDY BU_EMP TR_RDY TR_REQ ; 15 ; - */ #define VALID_DECODER (2 + 8 + 0x10 + 0x20 + 0x80 + 0x100 + 0x200) int sbni_probe(struct sbni_softc *sc) { u_char csr0; csr0 = sbni_inb(sc, CSR0); if (csr0 != 0xff && csr0 != 0x00) { csr0 &= ~EN_INT; if (csr0 & BU_EMP) csr0 |= EN_INT; if (VALID_DECODER & (1 << (csr0 >> 4))) return (0); } return (ENXIO); } /* * Install interface into kernel networking data structures */ void sbni_attach(struct sbni_softc *sc, int unit, struct sbni_flags flags) { struct ifnet *ifp; u_char csr0; ifp = &sc->arpcom.ac_if; sbni_outb(sc, CSR0, 0); set_initial_values(sc, flags); callout_init(&sc->sbni_stat_timer); /* Initialize ifnet structure */ ifp->if_softc = sc; if_initname(ifp, "sbni", unit); ifp->if_init = sbni_init; ifp->if_start = sbni_start; ifp->if_ioctl = sbni_ioctl; ifp->if_watchdog = sbni_watchdog; ifq_set_maxlen(&ifp->if_snd, IFQ_MAXLEN); ifq_set_ready(&ifp->if_snd); /* report real baud rate */ csr0 = sbni_inb(sc, CSR0); ifp->if_baudrate = (csr0 & 0x01 ? 500000 : 2000000) / (1 << flags.rate); ifp->if_flags = IFF_BROADCAST | IFF_SIMPLEX | IFF_MULTICAST; ether_ifattach(ifp, sc->arpcom.ac_enaddr, NULL); /* device attach does transition from UNCONFIGURED to IDLE state */ if_printf(ifp, "speed %ju, rxl ", (uintmax_t)ifp->if_baudrate); if (sc->delta_rxl) kprintf("auto\n"); else kprintf("%d (fixed)\n", sc->cur_rxl_index); } /* -------------------------------------------------------------------------- */ static void sbni_init(void *xsc) { struct sbni_softc *sc =xsc; struct ifnet *ifp = &sc->arpcom.ac_if; /* * kludge to avoid multiple initialization when more than once * protocols configured */ if (ifp->if_flags & IFF_RUNNING) return; ifp->if_timer = 0; card_start(sc); callout_reset(&sc->sbni_stat_timer,hz / SBNI_HZ, sbni_timeout, sc); ifp->if_flags |= IFF_RUNNING; ifp->if_flags &= ~IFF_OACTIVE; /* attempt to start output */ if_devstart(ifp); } static void sbni_start(struct ifnet *ifp) { struct sbni_softc *sc = ifp->if_softc; if (sc->tx_frameno == 0) prepare_to_send(sc); } static void sbni_stop(struct sbni_softc *sc) { sbni_outb(sc, CSR0, 0); drop_xmit_queue(sc); if (sc->rx_buf_p) { m_freem(sc->rx_buf_p); sc->rx_buf_p = NULL; } callout_stop(&sc->sbni_stat_timer); } /* -------------------------------------------------------------------------- */ /* interrupt handler */ /* * SBNI12D-10, -11/ISA boards within "common interrupt" mode could not * be looked as two independent single-channel devices. Every channel seems * as Ethernet interface but interrupt handler must be common. Really, first * channel ("master") driver only registers the handler. In it's struct softc * it has got pointer to "slave" channel's struct softc and handles that's * interrupts too. * softc of successfully attached ISA SBNI boards is linked to list. * While next board driver is initialized, it scans this list. If one * has found softc with same irq and ioaddr different by 4 then it assumes * this board to be "master". */ void sbni_intr(void *arg) { struct sbni_softc *sc; int repeat; sc = (struct sbni_softc *)arg; do { repeat = 0; if (sbni_inb(sc, CSR0) & (RC_RDY | TR_RDY)) { handle_channel(sc); repeat = 1; } if (sc->slave_sc && /* second channel present */ (sbni_inb(sc->slave_sc, CSR0) & (RC_RDY | TR_RDY))) { handle_channel(sc->slave_sc); repeat = 1; } } while (repeat); } static void handle_channel(struct sbni_softc *sc) { int req_ans; u_char csr0; sbni_outb(sc, CSR0, (sbni_inb(sc, CSR0) & ~EN_INT) | TR_REQ); sc->timer_ticks = CHANGE_LEVEL_START_TICKS; for (;;) { csr0 = sbni_inb(sc, CSR0); if ((csr0 & (RC_RDY | TR_RDY)) == 0) break; req_ans = !(sc->state & FL_PREV_OK); if (csr0 & RC_RDY) req_ans = recv_frame(sc); /* * TR_RDY always equals 1 here because we have owned the marker, * and we set TR_REQ when disabled interrupts */ csr0 = sbni_inb(sc, CSR0); if ((csr0 & TR_RDY) == 0 || (csr0 & RC_RDY) != 0) kprintf("sbni: internal error!\n"); /* if state & FL_NEED_RESEND != 0 then tx_frameno != 0 */ if (req_ans || sc->tx_frameno != 0) send_frame(sc); else { /* send the marker without any data */ sbni_outb(sc, CSR0, sbni_inb(sc, CSR0) & ~TR_REQ); } } sbni_outb(sc, CSR0, sbni_inb(sc, CSR0) | EN_INT); } /* * Routine returns 1 if it need to acknoweledge received frame. * Empty frame received without errors won't be acknoweledged. */ static int recv_frame(struct sbni_softc *sc) { u_int32_t crc; u_int framelen, frameno, ack; u_int is_first, frame_ok; crc = CRC32_INITIAL; framelen = 0; if (check_fhdr(sc, &framelen, &frameno, &ack, &is_first, &crc)) { frame_ok = framelen > 4 ? upload_data(sc, framelen, frameno, is_first, crc) : skip_tail(sc, framelen, crc); if (frame_ok) interpret_ack(sc, ack); } else frame_ok = 0; sbni_outb(sc, CSR0, sbni_inb(sc, CSR0) ^ CT_ZER); if (frame_ok) { sc->state |= FL_PREV_OK; if (framelen > 4) sc->in_stats.all_rx_number++; } else { sc->state &= ~FL_PREV_OK; change_level(sc); sc->in_stats.all_rx_number++; sc->in_stats.bad_rx_number++; } return (!frame_ok || framelen > 4); } static void send_frame(struct sbni_softc *sc) { u_int32_t crc; u_char csr0; crc = CRC32_INITIAL; if (sc->state & FL_NEED_RESEND) { /* if frame was sended but not ACK'ed - resend it */ if (sc->trans_errors) { sc->trans_errors--; if (sc->framelen != 0) sc->in_stats.resend_tx_number++; } else { /* cannot xmit with many attempts */ drop_xmit_queue(sc); goto do_send; } } else sc->trans_errors = TR_ERROR_COUNT; send_frame_header(sc, &crc); sc->state |= FL_NEED_RESEND; /* * FL_NEED_RESEND will be cleared after ACK, but if empty * frame sended then in prepare_to_send next frame */ if (sc->framelen) { download_data(sc, &crc); sc->in_stats.all_tx_number++; sc->state |= FL_WAIT_ACK; } sbni_outsb(sc, (u_char *)&crc, sizeof crc); do_send: csr0 = sbni_inb(sc, CSR0); sbni_outb(sc, CSR0, csr0 & ~TR_REQ); if (sc->tx_frameno) { /* next frame exists - request to send */ sbni_outb(sc, CSR0, csr0 | TR_REQ); } } static void download_data(struct sbni_softc *sc, u_int32_t *crc_p) { struct mbuf *m; caddr_t data_p; u_int data_len, pos, slice; data_p = NULL; /* initialized to avoid warn */ pos = 0; for (m = sc->tx_buf_p; m != NULL && pos < sc->pktlen; m = m->m_next) { if (pos + m->m_len > sc->outpos) { data_len = m->m_len - (sc->outpos - pos); data_p = mtod(m, caddr_t) + (sc->outpos - pos); goto do_copy; } else pos += m->m_len; } data_len = 0; do_copy: pos = 0; do { if (data_len) { slice = min(data_len, sc->framelen - pos); sbni_outsb(sc, data_p, slice); *crc_p = calc_crc32(*crc_p, data_p, slice); pos += slice; if (data_len -= slice) data_p += slice; else { do { m = m->m_next; } while (m != NULL && m->m_len == 0); if (m) { data_len = m->m_len; data_p = mtod(m, caddr_t); } } } else { /* frame too short - zero padding */ pos = sc->framelen - pos; while (pos--) { sbni_outb(sc, DAT, 0); *crc_p = CRC32(0, *crc_p); } return; } } while (pos < sc->framelen); } static int upload_data(struct sbni_softc *sc, u_int framelen, u_int frameno, u_int is_first, u_int32_t crc) { int frame_ok; if (is_first) { sc->wait_frameno = frameno; sc->inppos = 0; } if (sc->wait_frameno == frameno) { if (sc->inppos + framelen <= ETHER_MAX_LEN) { frame_ok = append_frame_to_pkt(sc, framelen, crc); /* * if CRC is right but framelen incorrect then transmitter * error was occured... drop entire packet */ } else if ((frame_ok = skip_tail(sc, framelen, crc)) != 0) { sc->wait_frameno = 0; sc->inppos = 0; sc->arpcom.ac_if.if_ierrors++; /* now skip all frames until is_first != 0 */ } } else frame_ok = skip_tail(sc, framelen, crc); if (is_first && !frame_ok) { /* * Frame has been violated, but we have stored * is_first already... Drop entire packet. */ sc->wait_frameno = 0; sc->arpcom.ac_if.if_ierrors++; } return (frame_ok); } static __inline void send_complete(struct sbni_softc *); static __inline void send_complete(struct sbni_softc *sc) { m_freem(sc->tx_buf_p); sc->tx_buf_p = NULL; sc->arpcom.ac_if.if_opackets++; } static void interpret_ack(struct sbni_softc *sc, u_int ack) { if (ack == FRAME_SENT_OK) { sc->state &= ~FL_NEED_RESEND; if (sc->state & FL_WAIT_ACK) { sc->outpos += sc->framelen; if (--sc->tx_frameno) { sc->framelen = min( sc->maxframe, sc->pktlen - sc->outpos); } else { send_complete(sc); prepare_to_send(sc); } } } sc->state &= ~FL_WAIT_ACK; } /* * Glue received frame with previous fragments of packet. * Indicate packet when last frame would be accepted. */ static int append_frame_to_pkt(struct sbni_softc *sc, u_int framelen, u_int32_t crc) { caddr_t p; if (sc->inppos + framelen > ETHER_MAX_LEN) return (0); if (!sc->rx_buf_p && !get_rx_buf(sc)) return (0); p = sc->rx_buf_p->m_data + sc->inppos; sbni_insb(sc, p, framelen); if (calc_crc32(crc, p, framelen) != CRC32_REMAINDER) return (0); sc->inppos += framelen - 4; if (--sc->wait_frameno == 0) { /* last frame received */ indicate_pkt(sc); sc->arpcom.ac_if.if_ipackets++; } return (1); } /* * Prepare to start output on adapter. * Transmitter will be actually activated when marker has been accepted. */ static void prepare_to_send(struct sbni_softc *sc) { struct mbuf *m; u_int len; /* sc->tx_buf_p == NULL here! */ if (sc->tx_buf_p) kprintf("sbni: memory leak!\n"); sc->outpos = 0; sc->state &= ~(FL_WAIT_ACK | FL_NEED_RESEND); for (;;) { sc->tx_buf_p = ifq_dequeue(&sc->arpcom.ac_if.if_snd, NULL); if (sc->tx_buf_p == NULL) { /* nothing to transmit... */ sc->pktlen = 0; sc->tx_frameno = 0; sc->framelen = 0; sc->arpcom.ac_if.if_flags &= ~IFF_OACTIVE; return; } for (len = 0, m = sc->tx_buf_p; m; m = m->m_next) len += m->m_len; if (len != 0) break; m_freem(sc->tx_buf_p); } if (len < SBNI_MIN_LEN) len = SBNI_MIN_LEN; sc->pktlen = len; sc->tx_frameno = (len + sc->maxframe - 1) / sc->maxframe; sc->framelen = min(len, sc->maxframe); sbni_outb(sc, CSR0, sbni_inb(sc, CSR0) | TR_REQ); sc->arpcom.ac_if.if_flags |= IFF_OACTIVE; BPF_MTAP(&sc->arpcom.ac_if, sc->tx_buf_p); } static void drop_xmit_queue(struct sbni_softc *sc) { if (sc->tx_buf_p) { m_freem(sc->tx_buf_p); sc->tx_buf_p = NULL; sc->arpcom.ac_if.if_oerrors++; } ifq_purge(&sc->arpcom.ac_if.if_snd); sc->tx_frameno = 0; sc->framelen = 0; sc->outpos = 0; sc->state &= ~(FL_WAIT_ACK | FL_NEED_RESEND); sc->arpcom.ac_if.if_flags &= ~IFF_OACTIVE; } static void send_frame_header(struct sbni_softc *sc, u_int32_t *crc_p) { u_int32_t crc; u_int len_field; u_char value; crc = *crc_p; len_field = sc->framelen + 6; /* CRC + frameno + reserved */ if (sc->state & FL_NEED_RESEND) len_field |= FRAME_RETRY; /* non-first attempt... */ if (sc->outpos == 0) len_field |= FRAME_FIRST; len_field |= (sc->state & FL_PREV_OK) ? FRAME_SENT_OK : FRAME_SENT_BAD; sbni_outb(sc, DAT, SBNI_SIG); value = (u_char)len_field; sbni_outb(sc, DAT, value); crc = CRC32(value, crc); value = (u_char)(len_field >> 8); sbni_outb(sc, DAT, value); crc = CRC32(value, crc); sbni_outb(sc, DAT, sc->tx_frameno); crc = CRC32(sc->tx_frameno, crc); sbni_outb(sc, DAT, 0); crc = CRC32(0, crc); *crc_p = crc; } /* * if frame tail not needed (incorrect number or received twice), * it won't store, but CRC will be calculated */ static int skip_tail(struct sbni_softc *sc, u_int tail_len, u_int32_t crc) { while (tail_len--) crc = CRC32(sbni_inb(sc, DAT), crc); return (crc == CRC32_REMAINDER); } static int check_fhdr(struct sbni_softc *sc, u_int *framelen, u_int *frameno, u_int *ack, u_int *is_first, u_int32_t *crc_p) { u_int32_t crc; u_char value; crc = *crc_p; if (sbni_inb(sc, DAT) != SBNI_SIG) return (0); value = sbni_inb(sc, DAT); *framelen = (u_int)value; crc = CRC32(value, crc); value = sbni_inb(sc, DAT); *framelen |= ((u_int)value) << 8; crc = CRC32(value, crc); *ack = *framelen & FRAME_ACK_MASK; *is_first = (*framelen & FRAME_FIRST) != 0; if ((*framelen &= FRAME_LEN_MASK) < 6 || *framelen > SBNI_MAX_FRAME - 3) return (0); value = sbni_inb(sc, DAT); *frameno = (u_int)value; crc = CRC32(value, crc); crc = CRC32(sbni_inb(sc, DAT), crc); /* reserved byte */ *framelen -= 2; *crc_p = crc; return (1); } static int get_rx_buf(struct sbni_softc *sc) { struct mbuf *m; MGETHDR(m, MB_DONTWAIT, MT_DATA); if (m == NULL) { kprintf("%s: cannot allocate header mbuf\n", sc->arpcom.ac_if.if_xname); return (0); } /* * We always put the received packet in a single buffer - * either with just an mbuf header or in a cluster attached * to the header. The +2 is to compensate for the alignment * fixup below. */ if (ETHER_MAX_LEN + 2 > MHLEN) { /* Attach an mbuf cluster */ MCLGET(m, MB_DONTWAIT); if ((m->m_flags & M_EXT) == 0) { m_freem(m); return (0); } } m->m_pkthdr.len = m->m_len = ETHER_MAX_LEN + 2; /* * The +2 is to longword align the start of the real packet. * (sizeof ether_header == 14) * This is important for NFS. */ m_adj(m, 2); sc->rx_buf_p = m; return (1); } static void indicate_pkt(struct sbni_softc *sc) { struct ifnet *ifp = &sc->arpcom.ac_if; struct mbuf *m; m = sc->rx_buf_p; m->m_pkthdr.rcvif = ifp; m->m_pkthdr.len = m->m_len = sc->inppos; ifp->if_input(ifp, m); sc->rx_buf_p = NULL; } /* -------------------------------------------------------------------------- */ /* * Routine checks periodically wire activity and regenerates marker if * connect was inactive for a long time. */ static void sbni_timeout(void *xsc) { struct sbni_softc *sc = xsc; u_char csr0; lwkt_serialize_enter(sc->arpcom.ac_if.if_serializer); csr0 = sbni_inb(sc, CSR0); if (csr0 & RC_CHK) { if (sc->timer_ticks) { if (csr0 & (RC_RDY | BU_EMP)) /* receiving not active */ sc->timer_ticks--; } else { sc->in_stats.timeout_number++; if (sc->delta_rxl) timeout_change_level(sc); sbni_outb(sc, CSR1, *(u_char *)&sc->csr1 | PR_RES); csr0 = sbni_inb(sc, CSR0); } } sbni_outb(sc, CSR0, csr0 | RC_CHK); callout_reset(&sc->sbni_stat_timer, hz / SBNI_HZ, sbni_timeout, sc); lwkt_serialize_exit(sc->arpcom.ac_if.if_serializer); } /* -------------------------------------------------------------------------- */ static void card_start(struct sbni_softc *sc) { sc->timer_ticks = CHANGE_LEVEL_START_TICKS; sc->state &= ~(FL_WAIT_ACK | FL_NEED_RESEND); sc->state |= FL_PREV_OK; sc->inppos = 0; sc->wait_frameno = 0; sbni_outb(sc, CSR1, *(u_char *)&sc->csr1 | PR_RES); sbni_outb(sc, CSR0, EN_INT); } /* -------------------------------------------------------------------------- */ /* * Device timeout/watchdog routine. Entered if the device neglects to * generate an interrupt after a transmit has been started on it. */ static void sbni_watchdog(struct ifnet *ifp) { log(LOG_ERR, "%s: device timeout\n", ifp->if_xname); ifp->if_oerrors++; } static u_char rxl_tab[] = { 0x00, 0x01, 0x02, 0x03, 0x04, 0x05, 0x06, 0x08, 0x0a, 0x0c, 0x0f, 0x16, 0x18, 0x1a, 0x1c, 0x1f }; #define SIZE_OF_TIMEOUT_RXL_TAB 4 static u_char timeout_rxl_tab[] = { 0x03, 0x05, 0x08, 0x0b }; static void set_initial_values(struct sbni_softc *sc, struct sbni_flags flags) { if (flags.fixed_rxl) { sc->delta_rxl = 0; /* disable receive level autodetection */ sc->cur_rxl_index = flags.rxl; } else { sc->delta_rxl = DEF_RXL_DELTA; sc->cur_rxl_index = DEF_RXL; } sc->csr1.rate = flags.fixed_rate ? flags.rate : DEFAULT_RATE; sc->csr1.rxl = rxl_tab[sc->cur_rxl_index]; sc->maxframe = DEFAULT_FRAME_LEN; /* * generate Ethernet address (0x00ff01xxxxxx) */ *(u_int16_t *) sc->arpcom.ac_enaddr = htons(0x00ff); if (flags.mac_addr) { *(u_int32_t *) (sc->arpcom.ac_enaddr + 2) = htonl(flags.mac_addr | 0x01000000); } else { *(u_char *) (sc->arpcom.ac_enaddr + 2) = 0x01; read_random_unlimited(sc->arpcom.ac_enaddr + 3, 3); } } #ifdef SBNI_DUAL_COMPOUND struct sbni_softc * connect_to_master(struct sbni_softc *sc) { struct sbni_softc *p, *p_prev; for (p = sbni_headlist, p_prev = NULL; p; p_prev = p, p = p->link) { if (rman_get_start(p->io_res) == rman_get_start(sc->io_res) + 4 || rman_get_start(p->io_res) == rman_get_start(sc->io_res) - 4) { p->slave_sc = sc; if (p_prev) p_prev->link = p->link; else sbni_headlist = p->link; return p; } } return (NULL); } #endif /* SBNI_DUAL_COMPOUND */ /* Receive level auto-selection */ static void change_level(struct sbni_softc *sc) { if (sc->delta_rxl == 0) /* do not auto-negotiate RxL */ return; if (sc->cur_rxl_index == 0) sc->delta_rxl = 1; else if (sc->cur_rxl_index == 15) sc->delta_rxl = -1; else if (sc->cur_rxl_rcvd < sc->prev_rxl_rcvd) sc->delta_rxl = -sc->delta_rxl; sc->csr1.rxl = rxl_tab[sc->cur_rxl_index += sc->delta_rxl]; sbni_inb(sc, CSR0); /* it needed for PCI cards */ sbni_outb(sc, CSR1, *(u_char *)&sc->csr1); sc->prev_rxl_rcvd = sc->cur_rxl_rcvd; sc->cur_rxl_rcvd = 0; } static void timeout_change_level(struct sbni_softc *sc) { sc->cur_rxl_index = timeout_rxl_tab[sc->timeout_rxl]; if (++sc->timeout_rxl >= 4) sc->timeout_rxl = 0; sc->csr1.rxl = rxl_tab[sc->cur_rxl_index]; sbni_inb(sc, CSR0); sbni_outb(sc, CSR1, *(u_char *)&sc->csr1); sc->prev_rxl_rcvd = sc->cur_rxl_rcvd; sc->cur_rxl_rcvd = 0; } /* -------------------------------------------------------------------------- */ /* * Process an ioctl request. This code needs some work - it looks * pretty ugly. */ static int sbni_ioctl(struct ifnet *ifp, u_long command, caddr_t data, struct ucred *cr) { struct sbni_softc *sc; struct ifreq *ifr; struct sbni_in_stats *in_stats; struct sbni_flags flags; int error; sc = ifp->if_softc; ifr = (struct ifreq *)data; error = 0; switch (command) { case SIOCSIFFLAGS: /* * If the interface is marked up and stopped, then start it. * If it is marked down and running, then stop it. */ if (ifp->if_flags & IFF_UP) { if (!(ifp->if_flags & IFF_RUNNING)) sbni_init(sc); } else { if (ifp->if_flags & IFF_RUNNING) { sbni_stop(sc); ifp->if_flags &= ~IFF_RUNNING; } } break; case SIOCADDMULTI: case SIOCDELMULTI: /* * Multicast list has changed; set the hardware filter * accordingly. */ error = 0; /* if (ifr == NULL) error = EAFNOSUPPORT; */ break; case SIOCSIFMTU: if (ifr->ifr_mtu > ETHERMTU) error = EINVAL; else ifp->if_mtu = ifr->ifr_mtu; break; /* * SBNI specific ioctl */ case SIOCGHWFLAGS: /* get flags */ bcopy((caddr_t) sc->arpcom.ac_enaddr+3, (caddr_t) &flags, 3); flags.rxl = sc->cur_rxl_index; flags.rate = sc->csr1.rate; flags.fixed_rxl = (sc->delta_rxl == 0); flags.fixed_rate = 1; ifr->ifr_data = *(caddr_t*) &flags; break; case SIOCGINSTATS: in_stats = (struct sbni_in_stats *)ifr->ifr_data; bcopy((void *)(&(sc->in_stats)), (void *)in_stats, sizeof(struct sbni_in_stats)); break; case SIOCSHWFLAGS: /* set flags */ /* root only */ error = priv_check_cred(cr, PRIV_ROOT, NULL_CRED_OKAY); /* NOTE: returns EPERM if no proc */ if (error) break; flags = *(struct sbni_flags*)&ifr->ifr_data; if (flags.fixed_rxl) { sc->delta_rxl = 0; sc->cur_rxl_index = flags.rxl; } else { sc->delta_rxl = DEF_RXL_DELTA; sc->cur_rxl_index = DEF_RXL; } sc->csr1.rxl = rxl_tab[sc->cur_rxl_index]; sc->csr1.rate = flags.fixed_rate ? flags.rate : DEFAULT_RATE; if (flags.mac_addr) bcopy((caddr_t) &flags, (caddr_t) sc->arpcom.ac_enaddr+3, 3); /* Don't be afraid... */ sbni_outb(sc, CSR1, *(char*)(&sc->csr1) | PR_RES); break; case SIOCRINSTATS: if (!(error = priv_check_cred(cr, PRIV_ROOT, NULL_CRED_OKAY))) /* root only */ bzero(&sc->in_stats, sizeof(struct sbni_in_stats)); break; default: error = ether_ioctl(ifp, command, data); break; } return (error); } /* -------------------------------------------------------------------------- */ #ifdef ASM_CRC static u_int32_t calc_crc32(u_int32_t crc, caddr_t p, u_int len) { u_int32_t _crc; _crc = crc; __asm __volatile ( "xorl %%ebx, %%ebx\n" "movl %1, %%esi\n" "movl %2, %%ecx\n" "movl $crc32tab, %%edi\n" "shrl $2, %%ecx\n" "jz 1f\n" ".align 4\n" "0:\n" "movb %%al, %%bl\n" "movl (%%esi), %%edx\n" "shrl $8, %%eax\n" "xorb %%dl, %%bl\n" "shrl $8, %%edx\n" "xorl (%%edi,%%ebx,4), %%eax\n" "movb %%al, %%bl\n" "shrl $8, %%eax\n" "xorb %%dl, %%bl\n" "shrl $8, %%edx\n" "xorl (%%edi,%%ebx,4), %%eax\n" "movb %%al, %%bl\n" "shrl $8, %%eax\n" "xorb %%dl, %%bl\n" "movb %%dh, %%dl\n" "xorl (%%edi,%%ebx,4), %%eax\n" "movb %%al, %%bl\n" "shrl $8, %%eax\n" "xorb %%dl, %%bl\n" "addl $4, %%esi\n" "xorl (%%edi,%%ebx,4), %%eax\n" "decl %%ecx\n" "jnz 0b\n" "1:\n" "movl %2, %%ecx\n" "andl $3, %%ecx\n" "jz 2f\n" "movb %%al, %%bl\n" "shrl $8, %%eax\n" "xorb (%%esi), %%bl\n" "xorl (%%edi,%%ebx,4), %%eax\n" "decl %%ecx\n" "jz 2f\n" "movb %%al, %%bl\n" "shrl $8, %%eax\n" "xorb 1(%%esi), %%bl\n" "xorl (%%edi,%%ebx,4), %%eax\n" "decl %%ecx\n" "jz 2f\n" "movb %%al, %%bl\n" "shrl $8, %%eax\n" "xorb 2(%%esi), %%bl\n" "xorl (%%edi,%%ebx,4), %%eax\n" "2:\n" : : "a" (_crc), "g" (p), "g" (len) : "bx", "cx", "dx", "si", "di" ); return (_crc); } #else /* ASM_CRC */ static u_int32_t calc_crc32(u_int32_t crc, caddr_t p, u_int len) { while (len--) crc = CRC32(*p++, crc); return (crc); } #endif /* ASM_CRC */ static u_int32_t crc32tab[] __attribute__ ((aligned(8))) = { 0xD202EF8D, 0xA505DF1B, 0x3C0C8EA1, 0x4B0BBE37, 0xD56F2B94, 0xA2681B02, 0x3B614AB8, 0x4C667A2E, 0xDCD967BF, 0xABDE5729, 0x32D70693, 0x45D03605, 0xDBB4A3A6, 0xACB39330, 0x35BAC28A, 0x42BDF21C, 0xCFB5FFE9, 0xB8B2CF7F, 0x21BB9EC5, 0x56BCAE53, 0xC8D83BF0, 0xBFDF0B66, 0x26D65ADC, 0x51D16A4A, 0xC16E77DB, 0xB669474D, 0x2F6016F7, 0x58672661, 0xC603B3C2, 0xB1048354, 0x280DD2EE, 0x5F0AE278, 0xE96CCF45, 0x9E6BFFD3, 0x0762AE69, 0x70659EFF, 0xEE010B5C, 0x99063BCA, 0x000F6A70, 0x77085AE6, 0xE7B74777, 0x90B077E1, 0x09B9265B, 0x7EBE16CD, 0xE0DA836E, 0x97DDB3F8, 0x0ED4E242, 0x79D3D2D4, 0xF4DBDF21, 0x83DCEFB7, 0x1AD5BE0D, 0x6DD28E9B, 0xF3B61B38, 0x84B12BAE, 0x1DB87A14, 0x6ABF4A82, 0xFA005713, 0x8D076785, 0x140E363F, 0x630906A9, 0xFD6D930A, 0x8A6AA39C, 0x1363F226, 0x6464C2B0, 0xA4DEAE1D, 0xD3D99E8B, 0x4AD0CF31, 0x3DD7FFA7, 0xA3B36A04, 0xD4B45A92, 0x4DBD0B28, 0x3ABA3BBE, 0xAA05262F, 0xDD0216B9, 0x440B4703, 0x330C7795, 0xAD68E236, 0xDA6FD2A0, 0x4366831A, 0x3461B38C, 0xB969BE79, 0xCE6E8EEF, 0x5767DF55, 0x2060EFC3, 0xBE047A60, 0xC9034AF6, 0x500A1B4C, 0x270D2BDA, 0xB7B2364B, 0xC0B506DD, 0x59BC5767, 0x2EBB67F1, 0xB0DFF252, 0xC7D8C2C4, 0x5ED1937E, 0x29D6A3E8, 0x9FB08ED5, 0xE8B7BE43, 0x71BEEFF9, 0x06B9DF6F, 0x98DD4ACC, 0xEFDA7A5A, 0x76D32BE0, 0x01D41B76, 0x916B06E7, 0xE66C3671, 0x7F6567CB, 0x0862575D, 0x9606C2FE, 0xE101F268, 0x7808A3D2, 0x0F0F9344, 0x82079EB1, 0xF500AE27, 0x6C09FF9D, 0x1B0ECF0B, 0x856A5AA8, 0xF26D6A3E, 0x6B643B84, 0x1C630B12, 0x8CDC1683, 0xFBDB2615, 0x62D277AF, 0x15D54739, 0x8BB1D29A, 0xFCB6E20C, 0x65BFB3B6, 0x12B88320, 0x3FBA6CAD, 0x48BD5C3B, 0xD1B40D81, 0xA6B33D17, 0x38D7A8B4, 0x4FD09822, 0xD6D9C998, 0xA1DEF90E, 0x3161E49F, 0x4666D409, 0xDF6F85B3, 0xA868B525, 0x360C2086, 0x410B1010, 0xD80241AA, 0xAF05713C, 0x220D7CC9, 0x550A4C5F, 0xCC031DE5, 0xBB042D73, 0x2560B8D0, 0x52678846, 0xCB6ED9FC, 0xBC69E96A, 0x2CD6F4FB, 0x5BD1C46D, 0xC2D895D7, 0xB5DFA541, 0x2BBB30E2, 0x5CBC0074, 0xC5B551CE, 0xB2B26158, 0x04D44C65, 0x73D37CF3, 0xEADA2D49, 0x9DDD1DDF, 0x03B9887C, 0x74BEB8EA, 0xEDB7E950, 0x9AB0D9C6, 0x0A0FC457, 0x7D08F4C1, 0xE401A57B, 0x930695ED, 0x0D62004E, 0x7A6530D8, 0xE36C6162, 0x946B51F4, 0x19635C01, 0x6E646C97, 0xF76D3D2D, 0x806A0DBB, 0x1E0E9818, 0x6909A88E, 0xF000F934, 0x8707C9A2, 0x17B8D433, 0x60BFE4A5, 0xF9B6B51F, 0x8EB18589, 0x10D5102A, 0x67D220BC, 0xFEDB7106, 0x89DC4190, 0x49662D3D, 0x3E611DAB, 0xA7684C11, 0xD06F7C87, 0x4E0BE924, 0x390CD9B2, 0xA0058808, 0xD702B89E, 0x47BDA50F, 0x30BA9599, 0xA9B3C423, 0xDEB4F4B5, 0x40D06116, 0x37D75180, 0xAEDE003A, 0xD9D930AC, 0x54D13D59, 0x23D60DCF, 0xBADF5C75, 0xCDD86CE3, 0x53BCF940, 0x24BBC9D6, 0xBDB2986C, 0xCAB5A8FA, 0x5A0AB56B, 0x2D0D85FD, 0xB404D447, 0xC303E4D1, 0x5D677172, 0x2A6041E4, 0xB369105E, 0xC46E20C8, 0x72080DF5, 0x050F3D63, 0x9C066CD9, 0xEB015C4F, 0x7565C9EC, 0x0262F97A, 0x9B6BA8C0, 0xEC6C9856, 0x7CD385C7, 0x0BD4B551, 0x92DDE4EB, 0xE5DAD47D, 0x7BBE41DE, 0x0CB97148, 0x95B020F2, 0xE2B71064, 0x6FBF1D91, 0x18B82D07, 0x81B17CBD, 0xF6B64C2B, 0x68D2D988, 0x1FD5E91E, 0x86DCB8A4, 0xF1DB8832, 0x616495A3, 0x1663A535, 0x8F6AF48F, 0xF86DC419, 0x660951BA, 0x110E612C, 0x88073096, 0xFF000000 };