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Diffstat (limited to 'sys/i386/isa/if_ie.c')
| -rw-r--r-- | sys/i386/isa/if_ie.c | 1953 |
1 files changed, 1953 insertions, 0 deletions
diff --git a/sys/i386/isa/if_ie.c b/sys/i386/isa/if_ie.c new file mode 100644 index 0000000..9693804 --- /dev/null +++ b/sys/i386/isa/if_ie.c @@ -0,0 +1,1953 @@ +/*- + * Copyright (c) 1992, 1993, University of Vermont and State + * Agricultural College. + * Copyright (c) 1992, 1993, Garrett A. Wollman. + * + * Portions: + * Copyright (c) 1990, 1991, William F. Jolitz + * Copyright (c) 1990, The Regents of the University of California + * + * 3Com 3C507 support: + * Copyright (c) 1993, 1994, Charles M. Hannum + * + * All rights reserved. + * + * Redistribution 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, 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. + * 3. All advertising materials mentioning features or use of this software + * must display the following acknowledgement: + * This product includes software developed by the University of + * Vermont and State Agricultural College and Garrett A. Wollman, + * by William F. Jolitz, by the University of California, + * Berkeley, by Larwence Berkeley Laboratory, by Charles M. Hannum, + * and their contributors. + * 4. Neither the names of the Universities nor the names of the authors + * may be used to endorse or promote products derived from this software + * without specific prior written permission. + * + * THIS SOFTWARE IS PROVIDED BY THE REGENTS 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 UNIVERSITY OR AUTHORS 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 NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY + * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF + * SUCH DAMAGE. + * + * $Id: if_ie.c,v 1.10 1994/08/24 22:32:43 ats Exp $ + */ + +/* + * Intel 82586 Ethernet chip + * Register, bit, and structure definitions. + * + * Written by GAW with reference to the Clarkson Packet Driver code for this + * chip written by Russ Nelson and others. + * + * BPF support code stolen directly from hpdev/if_le.c, supplied with + * tcpdump. + */ + +/* + * The i82586 is a very versatile chip, found in many implementations. + * Programming this chip is mostly the same, but certain details differ + * from card to card. This driver is written so that different cards + * can be automatically detected at run-time. Currently, only the + * AT&T EN100/StarLAN 10 series are supported. + */ + +/* +Mode of operation: + +We run the 82586 in a standard Ethernet mode. We keep NFRAMES received +frame descriptors around for the receiver to use, and NBUFFS associated +receive buffer descriptors, both in a circular list. Whenever a frame is +received, we rotate both lists as necessary. (The 586 treats both lists +as a simple queue.) We also keep a transmit command around so that packets +can be sent off quickly. + +We configure the adapter in AL-LOC = 1 mode, which means that the +Ethernet/802.3 MAC header is placed at the beginning of the receive buffer +rather than being split off into various fields in the RFD. This also +means that we must include this header in the transmit buffer as well. + +By convention, all transmit commands, and only transmit commands, shall +have the I (IE_CMD_INTR) bit set in the command. This way, when an +interrupt arrives at ieintr(), it is immediately possible to tell +what precisely caused it. ANY OTHER command-sending routines should +run at splimp(), and should post an acknowledgement to every interrupt +they generate. + +The 82586 has a 24-bit address space internally, and the adaptor's +memory is located at the top of this region. However, the value we are +given in configuration is normally the *bottom* of the adaptor RAM. So, +we must go through a few gyrations to come up with a kernel virtual address +which represents the actual beginning of the 586 address space. First, +we autosize the RAM by running through several possible sizes and trying +to initialize the adapter under the assumption that the selected size +is correct. Then, knowing the correct RAM size, we set up our pointers +in ie_softc[unit]. `iomem' represents the computed base of the 586 +address space. `iomembot' represents the actual configured base +of adapter RAM. Finally, `iosize' represents the calculated size +of 586 RAM. Then, when laying out commands, we use the interval +[iomembot, iomembot + iosize); to make 24-pointers, we subtract +iomem, and to make 16-pointers, we subtract iomem and and with 0xffff. + +*/ + +#include "ie.h" +#if NIE > 0 + +#include <sys/param.h> +#include <sys/systm.h> +#include <sys/mbuf.h> +#include <sys/protosw.h> +#include <sys/socket.h> +#include <sys/ioctl.h> +#include <sys/errno.h> +#include <sys/syslog.h> + +#include <net/if.h> +#include <net/if_types.h> +#include <net/if_dl.h> +#include <net/route.h> + +#include "bpfilter.h" + +#ifdef INET +#include <netinet/in.h> +#include <netinet/in_systm.h> +#include <netinet/in_var.h> +#include <netinet/ip.h> +#include <netinet/if_ether.h> +#endif + +#ifdef NS +#include <netns/ns.h> +#include <netns/ns_if.h> +#endif + +#include <i386/isa/isa.h> +#include <i386/isa/isa_device.h> +#include <i386/isa/ic/i82586.h> +#include <i386/isa/if_iereg.h> +#include <i386/isa/icu.h> +#include <i386/isa/if_ie507.h> +#include <i386/isa/elink.h> + +#include <vm/vm.h> + +#if NBPFILTER > 0 +#include <net/bpf.h> +#include <net/bpfdesc.h> +#endif + +#if (NBPFILTER > 0) || defined(MULTICAST) +#define FILTER +static struct mbuf *last_not_for_us; +#endif + +#ifdef DEBUG +#define IED_RINT 1 +#define IED_TINT 2 +#define IED_RNR 4 +#define IED_CNA 8 +#define IED_READFRAME 16 +int ie_debug = IED_RNR; +#endif + +#ifndef ETHERMINLEN +#define ETHERMINLEN 60 +#endif + +#define IE_BUF_LEN 1512 /* length of transmit buffer */ + +/* Forward declaration */ +struct ie_softc; + +static int ieprobe(struct isa_device *dvp); +static int ieattach(struct isa_device *dvp); +static void ieinit(int unit); +static int ieioctl(struct ifnet *ifp, int command, caddr_t data); +static void iestart(struct ifnet *ifp); +static void el_reset_586(int unit); +static void el_chan_attn(int unit); +static void sl_reset_586(int unit); +static void sl_chan_attn(int unit); +static void iereset(int unit); +static void ie_readframe(int unit, struct ie_softc *ie, int bufno); +static void ie_drop_packet_buffer(int unit, struct ie_softc *ie); +static void sl_read_ether(int unit, unsigned char addr[6]); +static void find_ie_mem_size(int unit); +static int command_and_wait(int unit, int command, void volatile *pcmd, int); +static int ierint(int unit, struct ie_softc *ie); +static int ietint(int unit, struct ie_softc *ie); +static int iernr(int unit, struct ie_softc *ie); +static void start_receiver(int unit); +static int ieget(int, struct ie_softc *, struct mbuf **, + struct ether_header *, int *); +static caddr_t setup_rfa(caddr_t ptr, struct ie_softc *ie); +static int mc_setup(int, caddr_t, volatile struct ie_sys_ctl_block *); +#ifdef MULTICAST +static void ie_mc_reset(int unit); +#endif + +#ifdef DEBUG +void print_rbd(volatile struct ie_recv_buf_desc *rbd); + +int in_ierint = 0; +int in_ietint = 0; +#endif + +/* + * This tells the autoconf code how to set us up. + */ +struct isa_driver iedriver = { + ieprobe, ieattach, "ie", +}; + +enum ie_hardware { + IE_STARLAN10, + IE_EN100, + IE_SLFIBER, + IE_3C507, + IE_UNKNOWN +}; + +const char *ie_hardware_names[] = { + "StarLAN 10", + "EN100", + "StarLAN Fiber", + "3C507", + "Unknown" +}; + +/* +sizeof(iscp) == 1+1+2+4 == 8 +sizeof(scb) == 2+2+2+2+2+2+2+2 == 16 +NFRAMES * sizeof(rfd) == NFRAMES*(2+2+2+2+6+6+2+2) == NFRAMES*24 == 384 +sizeof(xmit_cmd) == 2+2+2+2+6+2 == 18 +sizeof(transmit buffer) == 1512 +sizeof(transmit buffer desc) == 8 +----- +1946 + +NBUFFS * sizeof(rbd) == NBUFFS*(2+2+4+2+2) == NBUFFS*12 +NBUFFS * IE_RBUF_SIZE == NBUFFS*256 + +NBUFFS should be (16384 - 1946) / (256 + 12) == 14438 / 268 == 53 + +With NBUFFS == 48, this leaves us 1574 bytes for another command or +more buffers. Another transmit command would be 18+8+1512 == 1538 +---just barely fits! + +Obviously all these would have to be reduced for smaller memory sizes. +With a larger memory, it would be possible to roughly double the number of +both transmit and receive buffers. +*/ + +#define NFRAMES 16 /* number of frames to allow for receive */ +#define NBUFFS 48 /* number of buffers to allocate */ +#define IE_RBUF_SIZE 256 /* size of each buffer, MUST BE POWER OF TWO */ + +/* + * Ethernet status, per interface. + */ +struct ie_softc { + struct arpcom arpcom; + void (*ie_reset_586)(int); + void (*ie_chan_attn)(int); + enum ie_hardware hard_type; + int hard_vers; + + u_short port; + caddr_t iomem; + caddr_t iomembot; + unsigned iosize; + + int want_mcsetup; + int promisc; + volatile struct ie_int_sys_conf_ptr *iscp; + volatile struct ie_sys_ctl_block *scb; + volatile struct ie_recv_frame_desc *rframes[NFRAMES]; + volatile struct ie_recv_buf_desc *rbuffs[NBUFFS]; + volatile char *cbuffs[NBUFFS]; + int rfhead, rftail, rbhead, rbtail; + + volatile struct ie_xmit_cmd *xmit_cmds[2]; + volatile struct ie_xmit_buf *xmit_buffs[2]; + int xmit_count; + u_char *xmit_cbuffs[2]; + + struct ie_en_addr mcast_addrs[MAXMCAST + 1]; + int mcast_count; + +#if NBPFILTER > 0 + caddr_t ie_bpf; +#endif + +} ie_softc[NIE]; + +#define MK_24(base, ptr) ((caddr_t)((u_long)ptr - (u_long)base)) +#define MK_16(base, ptr) ((u_short)(u_long)MK_24(base, ptr)) + +#define PORT ie_softc[unit].port +#define MEM ie_softc[unit].iomem + +static int sl_probe(struct isa_device *); +static int el_probe(struct isa_device *); + +/* This routine written by Charles Martin Hannum. */ +int ieprobe(dvp) + struct isa_device *dvp; +{ + int ret; + + ret = sl_probe(dvp); + if(!ret) ret = el_probe(dvp); + return(ret); +} + +static int sl_probe(dvp) + struct isa_device *dvp; +{ + int unit = dvp->id_unit; + u_char c; + + ie_softc[unit].port = dvp->id_iobase; + ie_softc[unit].iomembot = dvp->id_maddr; + ie_softc[unit].iomem = 0; + + c = inb(PORT + IEATT_REVISION); + switch(SL_BOARD(c)) { + case SL10_BOARD: + ie_softc[unit].hard_type = IE_STARLAN10; + ie_softc[unit].ie_reset_586 = sl_reset_586; + ie_softc[unit].ie_chan_attn = sl_chan_attn; + break; + case EN100_BOARD: + ie_softc[unit].hard_type = IE_EN100; + ie_softc[unit].ie_reset_586 = sl_reset_586; + ie_softc[unit].ie_chan_attn = sl_chan_attn; + break; + case SLFIBER_BOARD: + ie_softc[unit].hard_type = IE_SLFIBER; + ie_softc[unit].ie_reset_586 = sl_reset_586; + ie_softc[unit].ie_chan_attn = sl_chan_attn; + break; + + /* + * Anything else is not recognized or cannot be used. + */ + default: + return 0; + } + + ie_softc[unit].hard_vers = SL_REV(c); + + /* + * Divine memory size on-board the card. Ususally 16k. + */ + find_ie_mem_size(unit); + + if(!ie_softc[unit].iosize) { + return 0; + } + + dvp->id_msize = ie_softc[unit].iosize; + + switch(ie_softc[unit].hard_type) { + case IE_EN100: + case IE_STARLAN10: + case IE_SLFIBER: + sl_read_ether(unit, ie_softc[unit].arpcom.ac_enaddr); + break; + + default: + printf("ie%d: unknown AT&T board type code %d\n", unit, + ie_softc[unit].hard_type); + return 0; + } + + return 1; +} + +/* This routine written by Charles Martin Hannum. */ +static int el_probe(dvp) + struct isa_device *dvp; +{ + struct ie_softc *sc = &ie_softc[dvp->id_unit]; + u_char c; + int i; + u_char signature[] = "*3COM*"; + int unit = dvp->id_unit; + + sc->port = dvp->id_iobase; + sc->iomembot = dvp->id_maddr; + + /* Need this for part of the probe. */ + sc->ie_reset_586 = el_reset_586; + sc->ie_chan_attn = el_chan_attn; + + /* Reset and put card in CONFIG state without changing address. */ + elink_reset(); + outb(ELINK_ID_PORT, 0x00); + elink_idseq(ELINK_507_POLY); + elink_idseq(ELINK_507_POLY); + outb(ELINK_ID_PORT, 0xff); + + c = inb(PORT + IE507_MADDR); + if(c & 0x20) { + printf("ie%d: can't map 3C507 RAM in high memory\n", unit); + return 0; + } + + /* go to RUN state */ + outb(ELINK_ID_PORT, 0x00); + elink_idseq(ELINK_507_POLY); + outb(ELINK_ID_PORT, 0x00); + + outb(PORT + IE507_CTRL, EL_CTRL_NRST); + + for (i = 0; i < 6; i++) + if (inb(PORT + i) != signature[i]) + return 0; + + c = inb(PORT + IE507_IRQ) & 0x0f; + + if (dvp->id_irq != (1 << c)) { + printf("ie%d: kernel configured irq %d doesn't match board configured irq %d\n", + unit, ffs(dvp->id_irq) - 1, c); + return 0; + } + + c = (inb(PORT + IE507_MADDR) & 0x1c) + 0xc0; + + if (kvtop(dvp->id_maddr) != ((int)c << 12)) { + printf("ie%d: kernel configured maddr %x doesn't match board configured maddr %x\n", + unit, kvtop(dvp->id_maddr),(int)c << 12); + return 0; + } + + outb(PORT + IE507_CTRL, EL_CTRL_NORMAL); + + sc->hard_type = IE_3C507; + sc->hard_vers = 0; /* 3C507 has no version number. */ + + /* + * Divine memory size on-board the card. + */ + find_ie_mem_size(dvp->id_unit); + + if (!sc->iosize) { + printf("ie%d: can't find shared memory\n", unit); + outb(PORT + IE507_CTRL, EL_CTRL_NRST); + return 0; + } + + if(!dvp->id_msize) + dvp->id_msize = sc->iosize; + else if (dvp->id_msize != sc->iosize) { + printf("ie%d: kernel configured msize %d doesn't match board configured msize %d\n", + unit, dvp->id_msize, sc->iosize); + outb(PORT + IE507_CTRL, EL_CTRL_NRST); + return 0; + } + + sl_read_ether(unit, ie_softc[unit].arpcom.ac_enaddr); + + /* Clear the interrupt latch just in case. */ + outb(PORT + IE507_ICTRL, 1); + + return 16; +} + +/* + * Taken almost exactly from Bill's if_is.c, then modified beyond recognition. + */ +int +ieattach(dvp) + struct isa_device *dvp; +{ + int unit = dvp->id_unit; + struct ie_softc *ie = &ie_softc[unit]; + struct ifnet *ifp = &ie->arpcom.ac_if; + + ifp->if_unit = unit; + ifp->if_name = iedriver.name; + ifp->if_mtu = ETHERMTU; + printf("<%s R%d> ethernet address %s\n", + ie_hardware_names[ie_softc[unit].hard_type], + ie_softc[unit].hard_vers + 1, + ether_sprintf(ie->arpcom.ac_enaddr)); + + ifp->if_flags = IFF_BROADCAST | IFF_SIMPLEX | IFF_NOTRAILERS; +#ifdef MULTICAST + ifp->if_flags |= IFF_MULTICAST; +#endif /* MULTICAST */ + + ifp->if_init = ieinit; + ifp->if_output = ether_output; + ifp->if_start = iestart; + ifp->if_ioctl = ieioctl; + ifp->if_reset = iereset; + ifp->if_type = IFT_ETHER; + ifp->if_addrlen = 6; + ifp->if_hdrlen = 14; + +#if NBPFILTER > 0 + bpfattach(&ie_softc[unit].ie_bpf, ifp, DLT_EN10MB, + sizeof(struct ether_header)); +#endif + + if_attach(ifp); + { + struct ifaddr *ifa = ifp->if_addrlist; + struct sockaddr_dl *sdl; + while(ifa && ifa->ifa_addr && ifa->ifa_addr->sa_family != AF_LINK) + ifa = ifa->ifa_next; + + if(!ifa || !ifa->ifa_addr) return 1; + + /* Provide our ether address to the higher layers */ + sdl = (struct sockaddr_dl *)ifa->ifa_addr; + sdl->sdl_type = IFT_ETHER; + sdl->sdl_alen = 6; + sdl->sdl_slen = 0; + bcopy(ie->arpcom.ac_enaddr, LLADDR(sdl), 6); + return 1; + } +} + +/* + * What to do upon receipt of an interrupt. + */ +int ieintr(unit) + int unit; +{ + register struct ie_softc *ie = &ie_softc[unit]; + register u_short status; + + status = ie->scb->ie_status; + + /* This if statement written by Charles Martin Hannum. */ + if ((status & IE_ST_WHENCE) == 0) { + /* Clear the interrupt latch on the 3C507. */ + if (ie->hard_type == IE_3C507 && + (inb(PORT + IE507_CTRL) & EL_CTRL_INTL)) + outb(PORT + IE507_ICTRL, 1); + } + +loop: + if(status & (IE_ST_RECV | IE_ST_RNR)) { +#ifdef DEBUG + in_ierint++; + if(ie_debug & IED_RINT) + printf("ie%d: rint\n", unit); +#endif + ierint(unit, ie); +#ifdef DEBUG + in_ierint--; +#endif + } + + if(status & IE_ST_DONE) { +#ifdef DEBUG + in_ietint++; + if(ie_debug & IED_TINT) + printf("ie%d: tint\n", unit); +#endif + ietint(unit, ie); +#ifdef DEBUG + in_ietint--; +#endif + } + + if(status & IE_ST_RNR) { +#ifdef DEBUG + if(ie_debug & IED_RNR) + printf("ie%d: rnr\n", unit); +#endif + iernr(unit, ie); + } + +#ifdef DEBUG + if((status & IE_ST_ALLDONE) + && (ie_debug & IED_CNA)) + printf("ie%d: cna\n", unit); +#endif + + /* Don't ack interrupts which we didn't receive */ + ie_ack(ie->scb, IE_ST_WHENCE & status, unit, ie->ie_chan_attn); + + if((status = ie->scb->ie_status) & IE_ST_WHENCE) + goto loop; + + /* This comment and if statement written by Charles Martin Hannum. */ + /* Clear the interrupt latch on the 3C507. */ + if (ie->hard_type == IE_3C507) + outb(PORT + IE507_ICTRL, 1); + + return unit; +} + +/* + * Process a received-frame interrupt. + */ +static int ierint(unit, ie) + int unit; + struct ie_softc *ie; +{ + int i, status; + static int timesthru = 1024; + + i = ie->rfhead; + while(1) { + status = ie->rframes[i]->ie_fd_status; + + if((status & IE_FD_COMPLETE) && (status & IE_FD_OK)) { + ie->arpcom.ac_if.if_ipackets++; + if(!--timesthru) { + ie->arpcom.ac_if.if_ierrors += ie->scb->ie_err_crc + ie->scb->ie_err_align + + ie->scb->ie_err_resource + ie->scb->ie_err_overrun; + ie->scb->ie_err_crc = 0; + ie->scb->ie_err_align = 0; + ie->scb->ie_err_resource = 0; + ie->scb->ie_err_overrun = 0; + timesthru = 1024; + } + ie_readframe(unit, ie, i); + } else { + if(status & IE_FD_RNR) { + if(!(ie->scb->ie_status & IE_RU_READY)) { + ie->rframes[0]->ie_fd_next = MK_16(MEM, ie->rbuffs[0]); + ie->scb->ie_recv_list = MK_16(MEM, ie->rframes[0]); + command_and_wait(unit, IE_RU_START, 0, 0); + } + } + break; + } + i = (i + 1) % NFRAMES; + } + return 0; +} + +/* + * Process a command-complete interrupt. These are only generated by + * the transmission of frames. This routine is deceptively simple, since + * most of the real work is done by iestart(). + */ +static int ietint(unit, ie) + int unit; + struct ie_softc *ie; +{ + int status; + int i; + + ie->arpcom.ac_if.if_timer = 0; + ie->arpcom.ac_if.if_flags &= ~IFF_OACTIVE; + + for(i = 0; i < ie->xmit_count; i++) { + status = ie->xmit_cmds[i]->ie_xmit_status; + + if(status & IE_XS_LATECOLL) { + printf("ie%d: late collision\n", unit); + ie->arpcom.ac_if.if_collisions++; + ie->arpcom.ac_if.if_oerrors++; + } else if(status & IE_XS_NOCARRIER) { + printf("ie%d: no carrier\n", unit); + ie->arpcom.ac_if.if_oerrors++; + } else if(status & IE_XS_LOSTCTS) { + printf("ie%d: lost CTS\n", unit); + ie->arpcom.ac_if.if_oerrors++; + } else if(status & IE_XS_UNDERRUN) { + printf("ie%d: DMA underrun\n", unit); + ie->arpcom.ac_if.if_oerrors++; + } else if(status & IE_XS_EXCMAX) { + printf("ie%d: too many collisions\n", unit); + ie->arpcom.ac_if.if_collisions += 16; + ie->arpcom.ac_if.if_oerrors++; + } else { + ie->arpcom.ac_if.if_opackets++; + ie->arpcom.ac_if.if_collisions += status & IE_XS_MAXCOLL; + } + } + ie->xmit_count = 0; + + /* + * If multicast addresses were added or deleted while we were transmitting, + * ie_mc_reset() set the want_mcsetup flag indicating that we should do it. + */ + if(ie->want_mcsetup) { + mc_setup(unit, (caddr_t)ie->xmit_cbuffs[0], ie->scb); + ie->want_mcsetup = 0; + } + + /* Wish I knew why this seems to be necessary... */ + ie->xmit_cmds[0]->ie_xmit_status |= IE_STAT_COMPL; + + iestart(&ie->arpcom.ac_if); + return 0; /* shouldn't be necessary */ +} + +/* + * Process a receiver-not-ready interrupt. I believe that we get these + * when there aren't enough buffers to go around. For now (FIXME), we + * just restart the receiver, and hope everything's ok. + */ +static int iernr(unit, ie) + int unit; + struct ie_softc *ie; +{ +#ifdef doesnt_work + setup_rfa((caddr_t)ie->rframes[0], ie); + + ie->scb->ie_recv_list = MK_16(MEM, ie_softc[unit].rframes[0]); + command_and_wait(unit, IE_RU_START, 0, 0); +#else + /* This doesn't work either, but it doesn't hang either. */ + command_and_wait(unit, IE_RU_DISABLE, 0, 0); /* just in case */ + setup_rfa((caddr_t)ie->rframes[0], ie); /* ignore cast-qual */ + + ie->scb->ie_recv_list = MK_16(MEM, ie_softc[unit].rframes[0]); + command_and_wait(unit, IE_RU_START, 0, 0); /* was ENABLE */ + +#endif + ie_ack(ie->scb, IE_ST_WHENCE, unit, ie->ie_chan_attn); + + ie->arpcom.ac_if.if_ierrors++; + return 0; +} + +#ifdef FILTER +/* + * Compare two Ether/802 addresses for equality, inlined and + * unrolled for speed. I'd love to have an inline assembler + * version of this... + */ +static inline int ether_equal(u_char *one, u_char *two) { + if(one[0] != two[0]) return 0; + if(one[1] != two[1]) return 0; + if(one[2] != two[2]) return 0; + if(one[3] != two[3]) return 0; + if(one[4] != two[4]) return 0; + if(one[5] != two[5]) return 0; + return 1; +} + +/* + * Check for a valid address. to_bpf is filled in with one of the following: + * 0 -> BPF doesn't get this packet + * 1 -> BPF does get this packet + * 2 -> BPF does get this packet, but we don't + * Return value is true if the packet is for us, and false otherwise. + * + * This routine is a mess, but it's also critical that it be as fast + * as possible. It could be made cleaner if we can assume that the + * only client which will fiddle with IFF_PROMISC is BPF. This is + * probably a good assumption, but we do not make it here. (Yet.) + */ +static inline int check_eh(struct ie_softc *ie, + struct ether_header *eh, + int *to_bpf) { + int i; + + switch(ie->promisc) { + case IFF_ALLMULTI: + /* + * Receiving all multicasts, but no unicasts except those destined for us. + */ +#if NBPFILTER > 0 + *to_bpf = (ie->ie_bpf != 0); /* BPF gets this packet if anybody cares */ +#endif + if(eh->ether_dhost[0] & 1) { + return 1; + } + if(ether_equal(eh->ether_dhost, ie->arpcom.ac_enaddr)) return 1; + return 0; + + case IFF_PROMISC: + /* + * Receiving all packets. These need to be passed on to BPF. + */ +#if NBPFILTER > 0 + *to_bpf = (ie->ie_bpf != 0); +#endif + /* If for us, accept and hand up to BPF */ + if(ether_equal(eh->ether_dhost, ie->arpcom.ac_enaddr)) return 1; + +#if NBPFILTER > 0 + if(*to_bpf) *to_bpf = 2; /* we don't need to see it */ +#endif + +#ifdef MULTICAST + /* + * Not a multicast, so BPF wants to see it but we don't. + */ + if(!(eh->ether_dhost[0] & 1)) return 1; + + /* + * If it's one of our multicast groups, accept it and pass it + * up. + */ + for(i = 0; i < ie->mcast_count; i++) { + if(ether_equal(eh->ether_dhost, (u_char *)&ie->mcast_addrs[i])) { +#if NBPFILTER > 0 + if(*to_bpf) *to_bpf = 1; +#endif + return 1; + } + } +#endif /* MULTICAST */ + return 1; + + case IFF_ALLMULTI | IFF_PROMISC: + /* + * Acting as a multicast router, and BPF running at the same time. + * Whew! (Hope this is a fast machine...) + */ +#if NBPFILTER > 0 + *to_bpf = (ie->ie_bpf != 0); +#endif + /* We want to see multicasts. */ + if(eh->ether_dhost[0] & 1) return 1; + + /* We want to see our own packets */ + if(ether_equal(eh->ether_dhost, ie->arpcom.ac_enaddr)) return 1; + + /* Anything else goes to BPF but nothing else. */ +#if NBPFILTER > 0 + if(*to_bpf) *to_bpf = 2; +#endif + return 1; + + default: + /* + * Only accept unicast packets destined for us, or multicasts + * for groups that we belong to. For now, we assume that the + * '586 will only return packets that we asked it for. This + * isn't strictly true (it uses hashing for the multicast filter), + * but it will do in this case, and we want to get out of here + * as quickly as possible. + */ +#if NBPFILTER > 0 + *to_bpf = (ie->ie_bpf != 0); +#endif + return 1; + } + return 0; +} +#endif /* FILTER */ + +/* + * We want to isolate the bits that have meaning... This assumes that + * IE_RBUF_SIZE is an even power of two. If somehow the act_len exceeds + * the size of the buffer, then we are screwed anyway. + */ +static inline int ie_buflen(struct ie_softc *ie, int head) { + return (ie->rbuffs[head]->ie_rbd_actual + & (IE_RBUF_SIZE | (IE_RBUF_SIZE - 1))); +} + +static inline int ie_packet_len(int unit, struct ie_softc *ie) { + int i; + int head = ie->rbhead; + int acc = 0; + + do { + if(!(ie->rbuffs[ie->rbhead]->ie_rbd_actual & IE_RBD_USED)) { +#ifdef DEBUG + print_rbd(ie->rbuffs[ie->rbhead]); +#endif + log(LOG_ERR, "ie%d: receive descriptors out of sync at %d\n", + unit, ie->rbhead); + iereset(unit); + return -1; + } + + i = ie->rbuffs[head]->ie_rbd_actual & IE_RBD_LAST; + + acc += ie_buflen(ie, head); + head = (head + 1) % NBUFFS; + } while(!i); + + return acc; +} + +/* + * Read data off the interface, and turn it into an mbuf chain. + * + * This code is DRAMATICALLY different from the previous version; this + * version tries to allocate the entire mbuf chain up front, given the + * length of the data available. This enables us to allocate mbuf + * clusters in many situations where before we would have had a long + * chain of partially-full mbufs. This should help to speed up the + * operation considerably. (Provided that it works, of course.) + */ +static inline int ieget(unit, ie, mp, ehp, to_bpf) + int unit; + struct ie_softc *ie; + struct mbuf **mp; + struct ether_header *ehp; + int *to_bpf; +{ + struct mbuf *m, *top, **mymp; + int i; + int offset; + int totlen, resid; + int thismboff; + int head; + + totlen = ie_packet_len(unit, ie); + if(totlen <= 0) return -1; + + i = ie->rbhead; + + /* + * Snarf the Ethernet header. + */ + bcopy((caddr_t)ie->cbuffs[i], (caddr_t)ehp, sizeof *ehp); + /* ignore cast-qual warning here */ + + /* + * As quickly as possible, check if this packet is for us. + * If not, don't waste a single cycle copying the rest of the + * packet in. + * This is only a consideration when FILTER is defined; i.e., when + * we are either running BPF or doing multicasting. + */ +#ifdef FILTER + if(!check_eh(ie, ehp, to_bpf)) { + ie_drop_packet_buffer(unit, ie); + ie->arpcom.ac_if.if_ierrors--; /* just this case, it's not an error */ + return -1; + } +#endif + totlen -= (offset = sizeof *ehp); + + MGETHDR(*mp, M_DONTWAIT, MT_DATA); + if(!*mp) { + ie_drop_packet_buffer(unit, ie); + return -1; + } + + m = *mp; + m->m_pkthdr.rcvif = &ie->arpcom.ac_if; + m->m_len = MHLEN; + resid = m->m_pkthdr.len = totlen; + top = 0; + mymp = ⊤ + + /* + * This loop goes through and allocates mbufs for all the data we will + * be copying in. It does not actually do the copying yet. + */ + do { /* while(resid > 0) */ + /* + * Try to allocate an mbuf to hold the data that we have. If we + * already allocated one, just get another one and stick it on the + * end (eventually). If we don't already have one, try to allocate + * an mbuf cluster big enough to hold the whole packet, if we think it's + * reasonable, or a single mbuf which may or may not be big enough. + * Got that? + */ + if(top) { + MGET(m, M_DONTWAIT, MT_DATA); + if(!m) { + m_freem(top); + ie_drop_packet_buffer(unit, ie); + return -1; + } + m->m_len = MLEN; + } + + if(resid >= MINCLSIZE) { + MCLGET(m, M_DONTWAIT); + if(m->m_flags & M_EXT) + m->m_len = min(resid, MCLBYTES); + } else { + if(resid < m->m_len) { + if(!top && resid + max_linkhdr <= m->m_len) + m->m_data += max_linkhdr; + m->m_len = resid; + } + } + resid -= m->m_len; + *mymp = m; + mymp = &m->m_next; + } while(resid > 0); + + resid = totlen; + m = top; + thismboff = 0; + head = ie->rbhead; + + /* + * Now we take the mbuf chain (hopefully only one mbuf most of the + * time) and stuff the data into it. There are no possible failures + * at or after this point. + */ + while(resid > 0) { /* while there's stuff left */ + int thislen = ie_buflen(ie, head) - offset; + + /* + * If too much data for the current mbuf, then fill the current one + * up, go to the next one, and try again. + */ + if(thislen > m->m_len - thismboff) { + int newlen = m->m_len - thismboff; + bcopy((caddr_t)(ie->cbuffs[head] + offset), + mtod(m, caddr_t) + thismboff, (unsigned)newlen); + /* ignore cast-qual warning */ + m = m->m_next; + thismboff = 0; /* new mbuf, so no offset */ + offset += newlen; /* we are now this far into the packet */ + resid -= newlen; /* so there is this much left to get */ + continue; + } + + /* + * If there is more than enough space in the mbuf to hold the + * contents of this buffer, copy everything in, advance pointers, + * and so on. + */ + if(thislen < m->m_len - thismboff) { + bcopy((caddr_t)(ie->cbuffs[head] + offset), /* ignore warning */ + mtod(m, caddr_t) + thismboff, (unsigned)thislen); + thismboff += thislen; /* we are this far into the mbuf */ + resid -= thislen; /* and this much is left */ + goto nextbuf; + } + + /* + * Otherwise, there is exactly enough space to put this buffer's + * contents into the current mbuf. Do the combination of the above + * actions. + */ + bcopy((caddr_t)(ie->cbuffs[head] + offset), /* ignore warning */ + mtod(m, caddr_t) + thismboff, (unsigned)thislen); + m = m->m_next; + thismboff = 0; /* new mbuf, start at the beginning */ + resid -= thislen; /* and we are this far through */ + + /* + * Advance all the pointers. We can get here from either of the + * last two cases, but never the first. + */ +nextbuf: + offset = 0; + ie->rbuffs[head]->ie_rbd_actual = 0; + ie->rbuffs[head]->ie_rbd_length |= IE_RBD_LAST; + ie->rbhead = head = (head + 1) % NBUFFS; + ie->rbuffs[ie->rbtail]->ie_rbd_length &= ~IE_RBD_LAST; + ie->rbtail = (ie->rbtail + 1) % NBUFFS; + } + + /* + * Unless something changed strangely while we were doing the copy, + * we have now copied everything in from the shared memory. + * This means that we are done. + */ + return 0; +} + +/* + * Read frame NUM from unit UNIT (pre-cached as IE). + * + * This routine reads the RFD at NUM, and copies in the buffers from + * the list of RBD, then rotates the RBD and RFD lists so that the receiver + * doesn't start complaining. Trailers are DROPPED---there's no point + * in wasting time on confusing code to deal with them. Hopefully, + * this machine will never ARP for trailers anyway. + */ +static void ie_readframe(unit, ie, num) + int unit; + struct ie_softc *ie; + int num; /* frame number to read */ +{ + struct ie_recv_frame_desc rfd; + struct mbuf *m = 0; + struct ether_header eh; +#if NBPFILTER > 0 + int bpf_gets_it = 0; +#endif + + bcopy((caddr_t)(ie->rframes[num]), &rfd, sizeof(struct ie_recv_frame_desc)); + + /* Immediately advance the RFD list, since we we have copied ours now. */ + ie->rframes[num]->ie_fd_status = 0; + ie->rframes[num]->ie_fd_last |= IE_FD_LAST; + ie->rframes[ie->rftail]->ie_fd_last &= ~IE_FD_LAST; + ie->rftail = (ie->rftail + 1) % NFRAMES; + ie->rfhead = (ie->rfhead + 1) % NFRAMES; + + if(rfd.ie_fd_status & IE_FD_OK) { + if( +#if NBPFILTER > 0 + ieget(unit, ie, &m, &eh, &bpf_gets_it) +#else + ieget(unit, ie, &m, &eh, (int *)0) +#endif + ) { + ie->arpcom.ac_if.if_ierrors++; /* this counts as an error */ + return; + } + } + +#ifdef DEBUG + if(ie_debug & IED_READFRAME) { + printf("ie%d: frame from ether %s type %x\n", unit, + ether_sprintf(eh.ether_shost), (unsigned)eh.ether_type); + } + if(ntohs(eh.ether_type) > ETHERTYPE_TRAIL + && ntohs(eh.ether_type) < (ETHERTYPE_TRAIL + ETHERTYPE_NTRAILER)) + printf("received trailer!\n"); +#endif + + if(!m) return; + +#ifdef FILTER + if(last_not_for_us) { + m_freem(last_not_for_us); + last_not_for_us = 0; + } + +#if NBPFILTER > 0 + /* + * Check for a BPF filter; if so, hand it up. + * Note that we have to stick an extra mbuf up front, because + * bpf_mtap expects to have the ether header at the front. + * It doesn't matter that this results in an ill-formatted mbuf chain, + * since BPF just looks at the data. (It doesn't try to free the mbuf, + * tho' it will make a copy for tcpdump.) + */ + if(bpf_gets_it) { + struct mbuf m0; + m0.m_len = sizeof eh; + m0.m_data = (caddr_t)&eh; + m0.m_next = m; + + /* Pass it up */ + bpf_mtap(ie->ie_bpf, &m0); + } + /* + * A signal passed up from the filtering code indicating that the + * packet is intended for BPF but not for the protocol machinery. + * We can save a few cycles by not handing it off to them. + */ + if(bpf_gets_it == 2) { + last_not_for_us = m; + return; + } +#endif /* NBPFILTER > 0 */ + /* + * In here there used to be code to check destination addresses upon + * receipt of a packet. We have deleted that code, and replaced it + * with code to check the address much earlier in the cycle, before + * copying the data in; this saves us valuable cycles when operating + * as a multicast router or when using BPF. + */ +#endif /* FILTER */ + + eh.ether_type = ntohs(eh.ether_type); + + /* + * Finally pass this packet up to higher layers. + */ + ether_input(&ie->arpcom.ac_if, &eh, m); +} + +static void ie_drop_packet_buffer(int unit, struct ie_softc *ie) { + int i; + + do { + /* + * This means we are somehow out of sync. So, we reset the + * adapter. + */ + if(!(ie->rbuffs[ie->rbhead]->ie_rbd_actual & IE_RBD_USED)) { +#ifdef DEBUG + print_rbd(ie->rbuffs[ie->rbhead]); +#endif + log(LOG_ERR, "ie%d: receive descriptors out of sync at %d\n", + unit, ie->rbhead); + iereset(unit); + return; + } + + i = ie->rbuffs[ie->rbhead]->ie_rbd_actual & IE_RBD_LAST; + + ie->rbuffs[ie->rbhead]->ie_rbd_length |= IE_RBD_LAST; + ie->rbuffs[ie->rbhead]->ie_rbd_actual = 0; + ie->rbhead = (ie->rbhead + 1) % NBUFFS; + ie->rbuffs[ie->rbtail]->ie_rbd_length &= ~IE_RBD_LAST; + ie->rbtail = (ie->rbtail + 1) % NBUFFS; + } while(!i); +} + + +/* + * Start transmission on an interface. + */ +static void +iestart(ifp) + struct ifnet *ifp; +{ + struct ie_softc *ie = &ie_softc[ifp->if_unit]; + struct mbuf *m0, *m; + unsigned char *buffer; + u_short len; + /* This is not really volatile, in this routine, but it makes gcc happy. */ + volatile u_short *bptr = &ie->scb->ie_command_list; + + if(!(ifp->if_flags & IFF_RUNNING)) + return; + if(ifp->if_flags & IFF_OACTIVE) + return; + + do { + IF_DEQUEUE(&ie->arpcom.ac_if.if_snd, m); + if(!m) + break; + + buffer = ie->xmit_cbuffs[ie->xmit_count]; + len = 0; + + for(m0 = m; m && len < IE_BUF_LEN; m = m->m_next) { + bcopy(mtod(m, caddr_t), buffer, m->m_len); + buffer += m->m_len; + len += m->m_len; + } + + m_freem(m0); + len = max(len, ETHERMINLEN); + +#if NBPFILTER > 0 + /* + * See if bpf is listening on this interface, let it see the packet + * before we commit it to the wire. + */ + if(ie->ie_bpf) + bpf_tap(ie->ie_bpf, ie->xmit_cbuffs[ie->xmit_count], len); +#endif + + ie->xmit_buffs[ie->xmit_count]->ie_xmit_flags = IE_XMIT_LAST | len; + ie->xmit_buffs[ie->xmit_count]->ie_xmit_next = 0xffff; + ie->xmit_buffs[ie->xmit_count]->ie_xmit_buf = + MK_24(ie->iomem, ie->xmit_cbuffs[ie->xmit_count]); + + ie->xmit_cmds[ie->xmit_count]->com.ie_cmd_cmd = IE_CMD_XMIT; + ie->xmit_cmds[ie->xmit_count]->ie_xmit_status = 0; + ie->xmit_cmds[ie->xmit_count]->ie_xmit_desc = + MK_16(ie->iomem, ie->xmit_buffs[ie->xmit_count]); + + *bptr = MK_16(ie->iomem, ie->xmit_cmds[ie->xmit_count]); + bptr = &ie->xmit_cmds[ie->xmit_count]->com.ie_cmd_link; + ie->xmit_count++; + } while(ie->xmit_count < 2); + + /* + * If we queued up anything for transmission, send it. + */ + if(ie->xmit_count) { + ie->xmit_cmds[ie->xmit_count - 1]->com.ie_cmd_cmd |= + IE_CMD_LAST | IE_CMD_INTR; + + /* + * By passing the command pointer as a null, we tell + * command_and_wait() to pretend that this isn't an action + * command. I wish I understood what was happening here. + */ + command_and_wait(ifp->if_unit, IE_CU_START, 0, 0); + ifp->if_flags |= IFF_OACTIVE; + } + + return; +} + +/* + * Check to see if there's an 82586 out there. + */ +int check_ie_present(unit, where, size) + int unit; + caddr_t where; + unsigned size; +{ + volatile struct ie_sys_conf_ptr *scp; + volatile struct ie_int_sys_conf_ptr *iscp; + volatile struct ie_sys_ctl_block *scb; + u_long realbase; + int s; + + s = splimp(); + + realbase = (u_long)where + size - (1 << 24); + + scp = (volatile struct ie_sys_conf_ptr *)(realbase + IE_SCP_ADDR); + bzero((char *)scp, sizeof *scp); /* ignore cast-qual */ + + /* + * First we put the ISCP at the bottom of memory; this tests to make + * sure that our idea of the size of memory is the same as the controller's. + * This is NOT where the ISCP will be in normal operation. + */ + iscp = (volatile struct ie_int_sys_conf_ptr *)where; + bzero((char *)iscp, sizeof *iscp); /* ignore cast-qual */ + + scb = (volatile struct ie_sys_ctl_block *)where; + bzero((char *)scb, sizeof *scb); /* ignore cast-qual */ + + scp->ie_bus_use = 0; /* 16-bit */ + scp->ie_iscp_ptr = (caddr_t)((volatile caddr_t)iscp - /* ignore cast-qual */ + (volatile caddr_t)realbase); + + iscp->ie_busy = 1; + iscp->ie_scb_offset = MK_16(realbase, scb) + 256; + + (*ie_softc[unit].ie_reset_586)(unit); + (*ie_softc[unit].ie_chan_attn)(unit); + + DELAY(100); /* wait a while... */ + + if(iscp->ie_busy) { + splx(s); + return 0; + } + + /* + * Now relocate the ISCP to its real home, and reset the controller + * again. + */ + iscp = (void *)Align((caddr_t)(realbase + IE_SCP_ADDR - + sizeof(struct ie_int_sys_conf_ptr))); + bzero((char *)iscp, sizeof *iscp); /* ignore cast-qual */ + + scp->ie_iscp_ptr = (caddr_t)((caddr_t)iscp - (caddr_t)realbase); + /* ignore cast-qual */ + + iscp->ie_busy = 1; + iscp->ie_scb_offset = MK_16(realbase, scb); + + (*ie_softc[unit].ie_reset_586)(unit); + (*ie_softc[unit].ie_chan_attn)(unit); + + DELAY(100); + + if(iscp->ie_busy) { + splx(s); + return 0; + } + + ie_softc[unit].iosize = size; + ie_softc[unit].iomem = (caddr_t)realbase; + + ie_softc[unit].iscp = iscp; + ie_softc[unit].scb = scb; + + /* + * Acknowledge any interrupts we may have caused... + */ + ie_ack(scb, IE_ST_WHENCE, unit, ie_softc[unit].ie_chan_attn); + splx(s); + + return 1; +} + +/* + * Divine the memory size of ie board UNIT. + * Better hope there's nothing important hiding just below the ie card... + */ +static void find_ie_mem_size(unit) + int unit; +{ + unsigned size; + + ie_softc[unit].iosize = 0; + + for(size = 65536; size >= 16384; size -= 16384) { + if(check_ie_present(unit, ie_softc[unit].iomembot, size)) { + return; + } + } + + return; +} + +void el_reset_586(unit) + int unit; +{ + outb(PORT + IE507_CTRL, EL_CTRL_RESET); + DELAY(100); + outb(PORT + IE507_CTRL, EL_CTRL_NORMAL); + DELAY(100); +} + +void sl_reset_586(unit) + int unit; +{ + outb(PORT + IEATT_RESET, 0); +} + +void el_chan_attn(unit) + int unit; +{ + outb(PORT + IE507_ATTN, 1); +} + +void sl_chan_attn(unit) + int unit; +{ + outb(PORT + IEATT_ATTN, 0); +} + +void sl_read_ether(unit, addr) + int unit; + unsigned char addr[6]; +{ + int i; + + for(i = 0; i < 6; i++) + addr[i] = inb(PORT + i); +} + + +static void +iereset(unit) + int unit; +{ + int s = splimp(); + + if(unit >= NIE) { + splx(s); + return; + } + + printf("ie%d: reset\n", unit); + ie_softc[unit].arpcom.ac_if.if_flags &= ~IFF_UP; + ieioctl(&ie_softc[unit].arpcom.ac_if, SIOCSIFFLAGS, 0); + + /* + * Stop i82586 dead in its tracks. + */ + if(command_and_wait(unit, IE_RU_ABORT | IE_CU_ABORT, 0, 0)) + printf("ie%d: abort commands timed out\n", unit); + + if(command_and_wait(unit, IE_RU_DISABLE | IE_CU_STOP, 0, 0)) + printf("ie%d: disable commands timed out\n", unit); + +#ifdef notdef + if(!check_ie_present(unit, ie_softc[unit].iomembot, ie_softc[unit].iosize)) + panic("ie disappeared!\n"); +#endif + + ie_softc[unit].arpcom.ac_if.if_flags |= IFF_UP; + ieioctl(&ie_softc[unit].arpcom.ac_if, SIOCSIFFLAGS, 0); + + splx(s); + return; +} + +/* + * This is called if we time out. + */ +static void +chan_attn_timeout(rock) + caddr_t rock; +{ + *(int *)rock = 1; +} + +/* + * Send a command to the controller and wait for it to either + * complete or be accepted, depending on the command. If the + * command pointer is null, then pretend that the command is + * not an action command. If the command pointer is not null, + * and the command is an action command, wait for + * ((volatile struct ie_cmd_common *)pcmd)->ie_cmd_status & MASK + * to become true. + */ +static int command_and_wait(unit, cmd, pcmd, mask) + int unit; + int cmd; + volatile void *pcmd; + int mask; +{ + volatile struct ie_cmd_common *cc = pcmd; + volatile int timedout = 0; + extern int hz; + + ie_softc[unit].scb->ie_command = (u_short)cmd; + + if(IE_ACTION_COMMAND(cmd) && pcmd) { + (*ie_softc[unit].ie_chan_attn)(unit); + + /* + * According to the packet driver, the minimum timeout should be + * .369 seconds, which we round up to .37. + */ + timeout(chan_attn_timeout, (caddr_t)&timedout, 37 * hz / 100); + /* ignore cast-qual */ + + /* + * Now spin-lock waiting for status. This is not a very nice + * thing to do, but I haven't figured out how, or indeed if, we + * can put the process waiting for action to sleep. (We may + * be getting called through some other timeout running in the + * kernel.) + */ + while(1) { + if((cc->ie_cmd_status & mask) || timedout) + break; + } + + untimeout(chan_attn_timeout, (caddr_t)&timedout); + /* ignore cast-qual */ + + return timedout; + } else { + + /* + * Otherwise, just wait for the command to be accepted. + */ + (*ie_softc[unit].ie_chan_attn)(unit); + + while(ie_softc[unit].scb->ie_command) + ; /* spin lock */ + + return 0; + } +} + +/* + * Run the time-domain reflectometer... + */ +static void run_tdr(unit, cmd) + int unit; + struct ie_tdr_cmd *cmd; +{ + int result; + + cmd->com.ie_cmd_status = 0; + cmd->com.ie_cmd_cmd = IE_CMD_TDR | IE_CMD_LAST; + cmd->com.ie_cmd_link = 0xffff; + cmd->ie_tdr_time = 0; + + ie_softc[unit].scb->ie_command_list = MK_16(MEM, cmd); + cmd->ie_tdr_time = 0; + + if(command_and_wait(unit, IE_CU_START, cmd, IE_STAT_COMPL)) + result = 0x2000; + else + result = cmd->ie_tdr_time; + + ie_ack(ie_softc[unit].scb, IE_ST_WHENCE, unit, + ie_softc[unit].ie_chan_attn); + + if(result & IE_TDR_SUCCESS) + return; + + if(result & IE_TDR_XCVR) { + printf("ie%d: transceiver problem\n", unit); + } else if(result & IE_TDR_OPEN) { + printf("ie%d: TDR detected an open %d clocks away\n", unit, + result & IE_TDR_TIME); + } else if(result & IE_TDR_SHORT) { + printf("ie%d: TDR detected a short %d clocks away\n", unit, + result & IE_TDR_TIME); + } else { + printf("ie%d: TDR returned unknown status %x\n", result); + } +} + +static void start_receiver(unit) + int unit; +{ + int s = splimp(); + + ie_softc[unit].scb->ie_recv_list = MK_16(MEM, ie_softc[unit].rframes[0]); + command_and_wait(unit, IE_RU_START, 0, 0); + + ie_ack(ie_softc[unit].scb, IE_ST_WHENCE, unit, ie_softc[unit].ie_chan_attn); + + splx(s); +} + +/* + * Here is a helper routine for iernr() and ieinit(). This sets up + * the RFA. + */ +static caddr_t setup_rfa(caddr_t ptr, struct ie_softc *ie) { + volatile struct ie_recv_frame_desc *rfd = (void *)ptr; + volatile struct ie_recv_buf_desc *rbd; + int i; + int unit = ie - &ie_softc[0]; + + /* First lay them out */ + for(i = 0; i < NFRAMES; i++) { + ie->rframes[i] = rfd; + bzero((char *)rfd, sizeof *rfd); /* ignore cast-qual */ + rfd++; + } + + ptr = (caddr_t)Align((caddr_t)rfd); /* ignore cast-qual */ + + /* Now link them together */ + for(i = 0; i < NFRAMES; i++) { + ie->rframes[i]->ie_fd_next = + MK_16(MEM, ie->rframes[(i + 1) % NFRAMES]); + } + + /* Finally, set the EOL bit on the last one. */ + ie->rframes[NFRAMES - 1]->ie_fd_last |= IE_FD_LAST; + + /* + * Now lay out some buffers for the incoming frames. Note that + * we set aside a bit of slop in each buffer, to make sure that + * we have enough space to hold a single frame in every buffer. + */ + rbd = (void *)ptr; + + for(i = 0; i < NBUFFS; i++) { + ie->rbuffs[i] = rbd; + bzero((char *)rbd, sizeof *rbd); /* ignore cast-qual */ + ptr = (caddr_t)Align(ptr + sizeof *rbd); + rbd->ie_rbd_length = IE_RBUF_SIZE; + rbd->ie_rbd_buffer = MK_24(MEM, ptr); + ie->cbuffs[i] = (void *)ptr; + ptr += IE_RBUF_SIZE; + rbd = (void *)ptr; + } + + /* Now link them together */ + for(i = 0; i < NBUFFS; i++) { + ie->rbuffs[i]->ie_rbd_next = MK_16(MEM, ie->rbuffs[(i + 1) % NBUFFS]); + } + + /* Tag EOF on the last one */ + ie->rbuffs[NBUFFS - 1]->ie_rbd_length |= IE_RBD_LAST; + + /* We use the head and tail pointers on receive to keep track of + * the order in which RFDs and RBDs are used. */ + ie->rfhead = 0; + ie->rftail = NFRAMES - 1; + ie->rbhead = 0; + ie->rbtail = NBUFFS - 1; + + ie->scb->ie_recv_list = MK_16(MEM, ie->rframes[0]); + ie->rframes[0]->ie_fd_buf_desc = MK_16(MEM, ie->rbuffs[0]); + + ptr = Align(ptr); + return ptr; +} + +/* + * Run the multicast setup command. + * Call at splimp(). + */ +static int mc_setup(int unit, caddr_t ptr, + volatile struct ie_sys_ctl_block *scb) { + struct ie_softc *ie = &ie_softc[unit]; + volatile struct ie_mcast_cmd *cmd = (void *)ptr; + + cmd->com.ie_cmd_status = 0; + cmd->com.ie_cmd_cmd = IE_CMD_MCAST | IE_CMD_LAST; + cmd->com.ie_cmd_link = 0xffff; + + /* ignore cast-qual */ + bcopy((caddr_t)ie->mcast_addrs, (caddr_t)cmd->ie_mcast_addrs, + ie->mcast_count * sizeof *ie->mcast_addrs); + + cmd->ie_mcast_bytes = ie->mcast_count * 6; /* grrr... */ + + scb->ie_command_list = MK_16(MEM, cmd); + if(command_and_wait(unit, IE_CU_START, cmd, IE_STAT_COMPL) + || !(cmd->com.ie_cmd_status & IE_STAT_OK)) { + printf("ie%d: multicast address setup command failed\n", unit); + return 0; + } + return 1; +} + +/* + * This routine takes the environment generated by check_ie_present() + * and adds to it all the other structures we need to operate the adapter. + * This includes executing the CONFIGURE, IA-SETUP, and MC-SETUP commands, + * starting the receiver unit, and clearing interrupts. + * + * THIS ROUTINE MUST BE CALLED AT splimp() OR HIGHER. + */ +static void +ieinit(unit) + int unit; +{ + struct ie_softc *ie = &ie_softc[unit]; + volatile struct ie_sys_ctl_block *scb = ie->scb; + caddr_t ptr; + + ptr = (caddr_t)Align((caddr_t)scb + sizeof *scb); /* ignore cast-qual */ + + /* + * Send the configure command first. + */ + { + volatile struct ie_config_cmd *cmd = (void *)ptr; + + ie_setup_config(cmd, ie->promisc, ie->hard_type == IE_STARLAN10); + cmd->com.ie_cmd_status = 0; + cmd->com.ie_cmd_cmd = IE_CMD_CONFIG | IE_CMD_LAST; + cmd->com.ie_cmd_link = 0xffff; + + scb->ie_command_list = MK_16(MEM, cmd); + + if(command_and_wait(unit, IE_CU_START, cmd, IE_STAT_COMPL) + || !(cmd->com.ie_cmd_status & IE_STAT_OK)) { + printf("ie%d: configure command failed\n", unit); + return; + } + } + /* + * Now send the Individual Address Setup command. + */ + { + volatile struct ie_iasetup_cmd *cmd = (void *)ptr; + + cmd->com.ie_cmd_status = 0; + cmd->com.ie_cmd_cmd = IE_CMD_IASETUP | IE_CMD_LAST; + cmd->com.ie_cmd_link = 0xffff; + + bcopy((char *)ie_softc[unit].arpcom.ac_enaddr, (char *)&cmd->ie_address, + sizeof cmd->ie_address); /* ignore cast-qual */ + + scb->ie_command_list = MK_16(MEM, cmd); + if(command_and_wait(unit, IE_CU_START, cmd, IE_STAT_COMPL) + || !(cmd->com.ie_cmd_status & IE_STAT_OK)) { + printf("ie%d: individual address setup command failed\n", unit); + return; + } + } + + /* + * Now run the time-domain reflectometer. + */ + run_tdr(unit, (void *)ptr); + + /* + * Acknowledge any interrupts we have generated thus far. + */ + ie_ack(ie->scb, IE_ST_WHENCE, unit, ie->ie_chan_attn); + + /* + * Set up the RFA. + */ + ptr = setup_rfa(ptr, ie); + + /* + * Finally, the transmit command and buffer are the last little bit of work. + */ + ie->xmit_cmds[0] = (void *)ptr; + ptr += sizeof *ie->xmit_cmds[0]; + ptr = Align(ptr); + ie->xmit_buffs[0] = (void *)ptr; + ptr += sizeof *ie->xmit_buffs[0]; + ptr = Align(ptr); + + /* Second transmit command */ + ie->xmit_cmds[1] = (void *)ptr; + ptr += sizeof *ie->xmit_cmds[1]; + ptr = Align(ptr); + ie->xmit_buffs[1] = (void *)ptr; + ptr += sizeof *ie->xmit_buffs[1]; + ptr = Align(ptr); + + /* Both transmit buffers */ + ie->xmit_cbuffs[0] = (void *)ptr; + ptr += IE_BUF_LEN; + ptr = Align(ptr); + ie->xmit_cbuffs[1] = (void *)ptr; + + bzero((caddr_t)ie->xmit_cmds[0], sizeof *ie->xmit_cmds[0]); /* ignore */ + bzero((caddr_t)ie->xmit_buffs[0], sizeof *ie->xmit_buffs[0]); /* cast-qual */ + bzero((caddr_t)ie->xmit_cmds[1], sizeof *ie->xmit_cmds[0]); /* warnings */ + bzero((caddr_t)ie->xmit_buffs[1], sizeof *ie->xmit_buffs[0]); /* here */ + + /* + * This must be coordinated with iestart() and ietint(). + */ + ie->xmit_cmds[0]->ie_xmit_status = IE_STAT_COMPL; + + ie->arpcom.ac_if.if_flags |= IFF_RUNNING; /* tell higher levels that we are here */ + start_receiver(unit); + return; +} + +static void ie_stop(unit) + int unit; +{ + command_and_wait(unit, IE_RU_DISABLE, 0, 0); +} + +static int +ieioctl(ifp, command, data) + struct ifnet *ifp; + int command; + caddr_t data; +{ + struct ifaddr *ifa = (struct ifaddr *)data; + struct ie_softc *ie = &ie_softc[ifp->if_unit]; + struct ifreq *ifr = (struct ifreq *) data; + int s, error = 0; + + s = splimp(); + + switch(command) { + case SIOCSIFADDR: + ifp->if_flags |= IFF_UP; + + switch(ifa->ifa_addr->sa_family) { +#ifdef INET + case AF_INET: + ieinit(ifp->if_unit); + ((struct arpcom *)ifp)->ac_ipaddr = + IA_SIN(ifa)->sin_addr; + arpwhohas((struct arpcom *)ifp, &IA_SIN(ifa)->sin_addr); + break; +#endif /* INET */ + +#ifdef NS + /* This magic copied from if_is.c; I don't use XNS, so I have no + * way of telling if this actually works or not. + */ + case AF_NS: + { + struct ns_addr *ina = &(IA_SNS(ifa)->sns_addr); + + if(ns_nullhost(*ina)) { + ina->x_host = *(union ns_host *)(ie->arpcom.ac_enaddr); + } else { + ifp->if_flags &= ~IFF_RUNNING; + bcopy((caddr_t)ina->x_host.c_host, + (caddr_t)ie->arpcom.ac_enaddr, + sizeof ie->arpcom.ac_enaddr); + } + + ieinit(ifp->if_unit); + } + break; +#endif /* NS */ + + default: + ieinit(ifp->if_unit); + break; + } + break; + + case SIOCSIFFLAGS: + /* + * Note that this device doesn't have an "all multicast" mode, so we + * must turn on promiscuous mode and do the filtering manually. + */ + if((ifp->if_flags & IFF_UP) == 0 && + (ifp->if_flags & IFF_RUNNING)) { + ifp->if_flags &= ~IFF_RUNNING; + ie_stop(ifp->if_unit); + } else if((ifp->if_flags & IFF_UP) && + (ifp->if_flags & IFF_RUNNING) == 0) { + ie_softc[ifp->if_unit].promisc = + ifp->if_flags & (IFF_PROMISC | IFF_ALLMULTI); + ieinit(ifp->if_unit); + } else if(ie_softc[ifp->if_unit].promisc ^ + (ifp->if_flags & (IFF_PROMISC | IFF_ALLMULTI))) { + ie_softc[ifp->if_unit].promisc = + ifp->if_flags & (IFF_PROMISC | IFF_ALLMULTI); + ieinit(ifp->if_unit); + } + break; + +#ifdef MULTICAST + case SIOCADDMULTI: + case SIOCDELMULTI: + /* + * Update multicast listeners + */ + error = ((command == SIOCADDMULTI) + ? ether_addmulti(ifr, &ie->arpcom) + : ether_delmulti(ifr, &ie->arpcom)); + + if(error == ENETRESET) { + /* reset multicast filtering */ + ie_mc_reset(ifp->if_unit); + error = 0; + } + break; +#endif /* MULTICAST */ + + case SIOCSIFMTU: + /* + * Set the interface MTU. + */ + if (ifr->ifr_mtu > ETHERMTU) { + error = EINVAL; + } else { + ifp->if_mtu = ifr->ifr_mtu; + } + break; + + default: + error = EINVAL; + } + + splx(s); + return error; +} + +#ifdef MULTICAST +static void ie_mc_reset(int unit) { + struct ie_softc *ie = &ie_softc[unit]; + struct ether_multi *enm; + struct ether_multistep step; + + /* + * Step through the list of addresses. + */ + ie->mcast_count = 0; + ETHER_FIRST_MULTI(step, &ie->arpcom, enm); + while(enm) { + if(ie->mcast_count >= MAXMCAST + || bcmp(enm->enm_addrlo, enm->enm_addrhi, 6) != 0) { + ie->arpcom.ac_if.if_flags |= IFF_ALLMULTI; + ieioctl(&ie->arpcom.ac_if, SIOCSIFFLAGS, (void *)0); + goto setflag; + } + + bcopy(enm->enm_addrlo, &(ie->mcast_addrs[ie->mcast_count]), 6); + ie->mcast_count++; + ETHER_NEXT_MULTI(step, enm); + } + +setflag: + ie->want_mcsetup = 1; +} + +#endif + +#ifdef DEBUG +void print_rbd(volatile struct ie_recv_buf_desc *rbd) { + printf("RBD at %08lx:\n" + "actual %04x, next %04x, buffer %08x\n" + "length %04x, mbz %04x\n", + (unsigned long)rbd, + rbd->ie_rbd_actual, rbd->ie_rbd_next, rbd->ie_rbd_buffer, + rbd->ie_rbd_length, rbd->mbz); +} +#endif /* DEBUG */ +#endif /* NIE > 0 */ + |
