/*- * TODO: * [1] integrate into current if_ed.c * [2] parse tuples to find out where to map the shared memory buffer, * and what to write into the configuration register * [3] move pcic-specific code into a separate module. * * Device driver for IBM PCMCIA Credit Card Adapter for Ethernet, * if_ze.c * * Based on the Device driver for National Semiconductor DS8390 ethernet * adapters by David Greenman. Modifications for PCMCIA by Keith Moore. * Adapted for FreeBSD 1.1.5 by Jordan Hubbard. * * Currently supports only the IBM Credit Card Adapter for Ethernet, but * could probably work with other PCMCIA cards also, if it were modified * to get the locations of the PCMCIA configuration option register (COR) * by parsing the configuration tuples, rather than by hard-coding in * the value expected by IBM's card. * * Sources for data on the PCMCIA/IBM CCAE specific portions of the driver: * * [1] _Local Area Network Credit Card Adapters Technical Reference_, * IBM Corp., SC30-3585-00, part # 33G9243. * [2] "pre-alpha" PCMCIA support code for Linux by Barry Jaspan. * [3] Intel 82536SL PC Card Interface Controller Data Sheet, Intel * Order Number 290423-002 * [4] National Semiconductor DP83902A ST-NIC (tm) Serial Network * Interface Controller for Twisted Pair data sheet. * * * Copyright (C) 1993, David Greenman. This software may be used, modified, * copied, distributed, and sold, in both source and binary form provided * that the above copyright and these terms are retained. Under no * circumstances is the author responsible for the proper functioning * of this software, nor does the author assume any responsibility * for damages incurred with its use. */ /* * I doubled delay loops in this file because it is not enough for some * laptop machines' PCIC (especially, on my Chaplet ILFA 350 ^^;). * HOSOKAWA, Tatsumi */ /* * Very small patch for IBM Ethernet PCMCIA Card II and IBM ThinkPad230Cs. * ETO, Toshihisa */ /* * $FreeBSD$ */ /* XXX don't mix different PCCARD support code. */ #include "card.h" #include "pcic.h" #if NCARD > 0 || NPCIC > 0 #include "opt_lint.h" #ifdef COMPILING_LINT static char const zedummy[] = "code to use the includes of card.h and pcic.h"; #else #error "Dedicated PCMCIA drivers and generic PCMCIA support can't be mixed" #endif #endif #include "ze.h" #if NZE > 0 #include "opt_inet.h" #include "opt_ipx.h" #include #include #include #include #include #include #include #include #include #include #include #include #include #include #ifndef SMP #include #endif #include #include #include "apm.h" #if NAPM > 0 #include #endif /* NAPM > 0 */ /***************************************************************************** * Driver for Ethernet Adapter * *****************************************************************************/ /* * ze_softc: per line info and status */ static struct ze_softc { struct arpcom arpcom; /* ethernet common */ caddr_t maddr; u_long iobase, irq; char *type_str; /* pointer to type string */ char *mau; /* type of media access unit */ u_short nic_addr; /* NIC (DS8390) I/O bus address */ caddr_t smem_start; /* shared memory start address */ caddr_t smem_end; /* shared memory end address */ u_long smem_size; /* total shared memory size */ caddr_t smem_ring; /* start of RX ring-buffer (in smem) */ u_char memwidth; /* width of access to card mem 8 or 16 */ u_char xmit_busy; /* transmitter is busy */ u_char txb_cnt; /* Number of transmit buffers */ u_char txb_next; /* Pointer to next buffer ready to xmit */ u_short txb_next_len; /* next xmit buffer length */ u_char data_buffered; /* data has been buffered in interface memory */ u_char tx_page_start; /* first page of TX buffer area */ u_char rec_page_start; /* first page of RX ring-buffer */ u_char rec_page_stop; /* last page of RX ring-buffer */ u_char next_packet; /* pointer to next unread RX packet */ int slot; /* information for reconfiguration */ u_char last_alive; /* information for reconfiguration */ u_char last_up; /* information for reconfiguration */ #if NAPM > 0 struct apmhook s_hook; /* reconfiguration support */ struct apmhook r_hook; /* reconfiguration support */ #endif /* NAPM > 0 */ } ze_softc[NZE]; static int ze_check_cis __P((unsigned char *scratch)); static int ze_find_adapter __P((unsigned char *scratch, int reconfig)); static int ze_probe __P((struct isa_device *isa_dev)); static void ze_setup __P((struct ze_softc *sc)); static int ze_suspend __P((void *visa_dev)); static int ze_resume __P((void *visa_dev)); static int ze_attach __P((struct isa_device *isa_dev)); static void ze_reset __P((int unit)); static void ze_stop __P((int unit)); static void ze_watchdog __P((struct ifnet *ifp)); static void ze_init __P((int unit)); static __inline void ze_xmit __P((struct ifnet *ifp)); static void ze_start __P((struct ifnet *ifp)); static __inline void ze_rint __P((int unit)); static ointhand2_t zeintr; static int ze_ioctl __P((struct ifnet *ifp, u_long command, caddr_t data)); static void ze_get_packet __P((struct ze_softc *sc, char *buf, int len)); static __inline char *ze_ring_copy __P((struct ze_softc *sc, char *src, char *dst, int amount)); static struct mbuf *ze_ring_to_mbuf __P((struct ze_softc *sc, char *src, struct mbuf *dst, int total_len)); struct isa_driver zedriver = { ze_probe, ze_attach, "ze" }; static unsigned char enet_addr[6]; static unsigned char card_info[256]; #define CARD_INFO "IBM Corp.~Ethernet~0933495" /* * IBM Ethernet PCMCIA Card II returns following info. */ #define CARD2_INFO "IBM Corp.~Ethernet~0934214" /* */ #define CARD3_INFO "National Semiconductor~InfoMover NE4" /* * scan the card information structure looking for the version/product info * tuple. when we find it, compare it to the string we are looking for. * return 1 if we find it, 0 otherwise. */ static int ze_check_cis (unsigned char *scratch) { int i,j,k; card_info[0] = '\0'; i = 0; while (scratch[i] != 0xff && i < 1024) { unsigned char link = scratch[i+2]; #if 0 printf ("[%02x] %02x ", i, link); for (j = 4; j < 2 * link + 4 && j < 32; j += 2) printf ("%02x ", scratch[j + i]); printf ("\n"); #endif if (scratch[i] == 0x15) { /* * level 1 version/product info * copy to card_info, translating '\0' to '~' */ k = 0; for (j = i+8; scratch[j] != 0xff; j += 2) card_info[k++] = scratch[j] == '\0' ? '~' : scratch[j]; card_info[k++] = '\0'; #if 0 return (bcmp (card_info, CARD_INFO, sizeof(CARD_INFO)-1) == 0); #else if ((bcmp (card_info, CARD_INFO, sizeof(CARD_INFO)-1) == 0) || (bcmp (card_info, CARD2_INFO, sizeof(CARD2_INFO)-1) == 0) || (bcmp (card_info, CARD3_INFO, sizeof(CARD3_INFO)-1) == 0)) { return 1; } return 0; #endif } i += 4 + 2 * link; } return 0; } /* * Probe each slot looking for an IBM Credit Card Adapter for Ethernet * For each card that we find, map its card information structure * into system memory at 'scratch' and see whether it's one of ours. * Return the slot number if we find a card, or -1 otherwise. * * Side effects: * + On success, leaves CIS mapped into memory at 'scratch'; * caller must free it. * + On success, leaves ethernet address in enet_addr. * + Leaves product/vendor id of last card probed in 'card_info' */ static int prev_slot = 0; static int ze_find_adapter (unsigned char *scratch, int reconfig) { int slot; for (slot = prev_slot; slot < MAXSLOT; ++slot) { /* * see if there's a PCMCIA controller here * Intel PCMCIA controllers use 0x82 and 0x83 * IBM clone chips use 0x88 and 0x89, apparently */ /* * IBM ThinkPad230Cs use 0x84. */ unsigned char idbyte = pcic_getb (slot, PCIC_ID_REV); if (idbyte != 0x82 && idbyte != 0x83 && idbyte != 0x84 && /* for IBM ThinkPad 230Cs */ idbyte != 0x88 && idbyte != 0x89) { #if 0 printf ("ibmccae: pcic slot %d: wierd id/rev code 0x%02x\n", slot, idbyte); #endif continue; } if ((pcic_getb (slot, PCIC_STATUS) & PCIC_CD) != PCIC_CD) { if (!reconfig) { printf ("ze: slot %d: no card in slot\n", slot); } else { log (LOG_NOTICE, "ze: slot %d: no card in slot\n", slot); } /* no card in slot */ continue; } pcic_power_on (slot); pcic_reset (slot); /* * map the card's attribute memory and examine its * card information structure tuples for something * we recognize. */ pcic_map_memory (slot, 0, kvtop (scratch), 0L, 0xFFFL, ATTRIBUTE, 1); if ((ze_check_cis (scratch)) > 0) { /* found it */ if (!reconfig) { printf ("ze: found card in slot %d\n", slot); } else { log (LOG_NOTICE, "ze: found card in slot %d\n", slot); } prev_slot = (prev_slot == MAXSLOT - 1) ? 0 : prev_slot+1; return slot; } else { if (!reconfig) { printf ("ze: pcmcia slot %d: %s\n", slot, card_info); } else { log (LOG_NOTICE, "ze: pcmcia slot %d: %s\n", slot, card_info); } } pcic_unmap_memory (slot, 0); } prev_slot = 0; return -1; } /* * macros to handle casting unsigned long to (char *) so we can * read/write into physical memory space. */ #define PEEK(addr) (*((unsigned char *)(addr))) #define POKE(addr,val) do { PEEK(addr) = (val); } while (0) /* * Determine if the device is present * * on entry: * a pointer to an isa_device struct * on exit: * NULL if device not found * or # of i/o addresses used (if found) pcic( */ static int ze_probe(isa_dev) struct isa_device *isa_dev; { struct ze_softc *sc = &ze_softc[isa_dev->id_unit]; int i; u_int memsize; u_char tmp; int slot; if ((slot = ze_find_adapter (isa_dev->id_maddr, isa_dev->id_reconfig)) < 0) return 0; /* * okay, we found a card, so set it up */ /* * Inhibit 16 bit memory delay. * POINTETH.SYS apparently does this, for what reason I don't know. */ pcic_putb (slot, PCIC_CDGC, pcic_getb (slot, PCIC_CDGC) | PCIC_16_DL_INH); /* * things to map * (1) card's EEPROM is already mapped by the find_adapter routine * but we still need to get the card's ethernet address. * after that we unmap that part of attribute memory. * (2) card configuration registers need to be mapped in so we * can set the configuration and socket # registers. * (3) shared memory packet buffer * (4) i/o ports * (5) IRQ */ /* * Sigh. Location of the ethernet address isn't documented in [1]. * It was derived by doing a hex dump of all of attribute memory * and looking for the IBM vendor prefix. */ enet_addr[0] = PEEK(isa_dev->id_maddr+0xff0); enet_addr[1] = PEEK(isa_dev->id_maddr+0xff2); enet_addr[2] = PEEK(isa_dev->id_maddr+0xff4); enet_addr[3] = PEEK(isa_dev->id_maddr+0xff6); enet_addr[4] = PEEK(isa_dev->id_maddr+0xff8); enet_addr[5] = PEEK(isa_dev->id_maddr+0xffa); pcic_unmap_memory (slot, 0); sc->maddr = isa_dev->id_maddr; sc->irq = isa_dev->id_irq; sc->iobase = isa_dev->id_iobase; sc->slot = slot; /* * Setup i/o addresses */ sc->nic_addr = sc->iobase; sc->smem_start = (caddr_t)sc->maddr; ze_setup(sc); tmp = inb (sc->iobase + ZE_RESET); sc->mau = tmp & 0x09 ? "10base2" : "10baseT"; /* set width/size */ sc->type_str = "IBM PCMCIA"; memsize = 16*1024; sc->memwidth = 16; /* allocate 1 xmit buffer */ sc->smem_ring = sc->smem_start + (ED_PAGE_SIZE * ED_TXBUF_SIZE); sc->txb_cnt = 1; sc->rec_page_start = ED_TXBUF_SIZE + ZE_PAGE_OFFSET; sc->smem_size = memsize; sc->smem_end = sc->smem_start + memsize; sc->rec_page_stop = memsize / ED_PAGE_SIZE + ZE_PAGE_OFFSET; sc->tx_page_start = ZE_PAGE_OFFSET; /* get station address */ for (i = 0; i < ETHER_ADDR_LEN; ++i) sc->arpcom.ac_enaddr[i] = enet_addr[i]; isa_dev->id_msize = memsize; /* information for reconfiguration */ sc->last_alive = 0; sc->last_up = 0; return 32; } static void ze_setup(struct ze_softc *sc) { int re_init_flag = 0,tmp,slot = sc->slot; re_init: /* * (2) map card configuration registers. these are offset * in card memory space by 0x20000. normally we could get * this offset from the card information structure, but I'm * too lazy and am not quite sure if I understand the CIS anyway. * * XXX IF YOU'RE TRYING TO PORT THIS DRIVER FOR A DIFFERENT * PCMCIA CARD, the most likely thing to change is the constant * 0x20000 in the next statement. Oh yes, also change the * card id string that we probe for. */ pcic_map_memory (slot, 0, kvtop (sc->maddr), 0x20000, 8L, ATTRIBUTE, 1); POKE(sc->maddr, 0x80); /* reset the card (how long?) */ DELAY (40000); /* * Set the configuration index. According to [1], the adapter won't * respond to any i/o signals until we do this; it uses the * Memory Only interface (whatever that is; it's not documented). * Also turn on "level" (not pulse) interrupts. * * XXX probably should init the socket and copy register also, * so that we can deal with multiple instances of the same card. */ POKE(sc->maddr, 0x41); pcic_unmap_memory (slot, 0); /* * (3) now map in the shared memory buffer. This has to be mapped * as words, not bytes, and on a 16k boundary. The offset value * was derived by installing IBM's POINTETH.SYS under DOS and * looking at the PCIC registers; it's not documented in IBM's * tech ref manual ([1]). */ pcic_map_memory (slot, 0, kvtop (sc->maddr), 0x4000L, 0x4000L, COMMON, 2); /* * (4) map i/o ports. * * XXX is it possible that the config file leaves this unspecified, * in which case we have to pick one? * * At least one PCMCIA device driver I'v seen maps a block * of 32 consecutive i/o ports as two windows of 16 ports each. * Maybe some other pcic chips are restricted to 16-port windows; * the 82365SL doesn't seem to have that problem. But since * we have an extra window anyway... */ #ifdef SHARED_MEMORY pcic_map_io (slot, 0, sc->iobase, 32, 1); #else pcic_map_io (slot, 0, sc->iobase, 16, 1); pcic_map_io (slot, 1, sc->iobase+16, 16, 2); #endif /* SHARED_MEMORY */ /* * (5) configure the card for the desired interrupt * * XXX is it possible that the config file leaves this unspecified? */ pcic_map_irq (slot, ffs (sc->irq) - 1); /* tell the PCIC that this is an I/O card (not memory) */ pcic_putb (slot, PCIC_INT_GEN, pcic_getb (slot, PCIC_INT_GEN) | PCIC_CARDTYPE); #if 0 /* tell the PCIC to use level-mode interrupts */ /* XXX this register may not be present on all controllers */ pcic_putb (slot, PCIC_GLO_CTRL, pcic_getb (slot, PCIC_GLO_CTRL) | PCIC_LVL_MODE); #endif #if 0 pcic_print_regs (slot); #endif /* reset card to force it into a known state */ tmp = inb (sc->iobase + ZE_RESET); DELAY(20000); outb (sc->iobase + ZE_RESET, tmp); DELAY(20000); #if 0 tmp = inb(sc->iobase); printf("CR = 0x%x\n", tmp); #endif /* * query MAM bit in misc register for 10base2 */ tmp = inb (sc->iobase + ZE_MISC); /* * Some Intel-compatible PCICs of Cirrus Logic fails in * initializing them. This is a quick hack to fix this * problem. * HOSOKAWA, Tatsumi */ if (!tmp && !re_init_flag) { re_init_flag++; goto re_init; } } #if NAPM > 0 static int ze_suspend(visa_dev) void *visa_dev; { struct isa_device *isa_dev = visa_dev; struct ze_softc *sc = &ze_softc[isa_dev->id_unit]; pcic_power_off(sc->slot); return 0; } static int ze_resume(visa_dev) void *visa_dev; { struct isa_device *isa_dev = visa_dev; #if 0 printf("Resume ze:\n"); #endif prev_slot = 0; reconfig_isadev(isa_dev, &net_imask); return 0; } #endif /* NAPM > 0 */ /* * Install interface into kernel networking data structures */ static int ze_attach(isa_dev) struct isa_device *isa_dev; { struct ze_softc *sc = &ze_softc[isa_dev->id_unit]; struct ifnet *ifp = &sc->arpcom.ac_if; int pl; isa_dev->id_ointr = zeintr; /* PCMCIA card can be offlined. Reconfiguration is required */ if (isa_dev->id_reconfig) { ze_reset(isa_dev->id_unit); if (!isa_dev->id_alive && sc->last_alive) { pl = splimp(); sc->last_up = (ifp->if_flags & IFF_UP); if_down(ifp); splx(pl); sc->last_alive = 0; } if (isa_dev->id_alive && !sc->last_alive) { if (sc->last_up) { pl = splimp(); if_up(ifp); splx(pl); } sc->last_alive = 1; } return 1; } else { sc->last_alive = 1; } /* * Set interface to stopped condition (reset) */ ze_stop(isa_dev->id_unit); /* * Initialize ifnet structure */ ifp->if_softc = sc; ifp->if_unit = isa_dev->id_unit; ifp->if_name = "ze" ; ifp->if_mtu = ETHERMTU; ifp->if_output = ether_output; ifp->if_start = ze_start; ifp->if_ioctl = ze_ioctl; ifp->if_watchdog = ze_watchdog; ifp->if_flags = (IFF_BROADCAST | IFF_SIMPLEX); /* * Attach the interface */ if_attach(ifp); ether_ifattach(ifp); /* * Print additional info when attached */ printf("ze%d: address %6D, type %s (%dbit), MAU %s\n", isa_dev->id_unit, sc->arpcom.ac_enaddr, ":", sc->type_str, sc->memwidth, sc->mau); /* * If BPF is in the kernel, call the attach for it */ bpfattach(ifp, DLT_EN10MB, sizeof(struct ether_header)); #if NAPM > 0 sc->s_hook.ah_fun = ze_suspend; sc->s_hook.ah_arg = (void *)isa_dev; sc->s_hook.ah_name = "IBM PCMCIA Ethernet I/II"; sc->s_hook.ah_order = APM_MID_ORDER; apm_hook_establish(APM_HOOK_SUSPEND , &sc->s_hook); sc->r_hook.ah_fun = ze_resume; sc->r_hook.ah_arg = (void *)isa_dev; sc->r_hook.ah_name = "IBM PCMCIA Ethernet I/II"; sc->r_hook.ah_order = APM_MID_ORDER; apm_hook_establish(APM_HOOK_RESUME , &sc->r_hook); #endif /* NAPM > 0 */ return 1; } /* * Reset interface. */ static void ze_reset(unit) int unit; { int s; s = splnet(); /* * Stop interface and re-initialize. */ ze_stop(unit); ze_init(unit); (void) splx(s); } /* * Take interface offline. */ static void ze_stop(unit) int unit; { struct ze_softc *sc = &ze_softc[unit]; int n = 5000; /* * Stop everything on the interface, and select page 0 registers. */ outb(sc->nic_addr + ED_P0_CR, ED_CR_RD2|ED_CR_STP); /* * Wait for interface to enter stopped state, but limit # of checks * to 'n' (about 5ms). It shouldn't even take 5us on modern * DS8390's, but just in case it's an old one. */ while (((inb(sc->nic_addr + ED_P0_ISR) & ED_ISR_RST) == 0) && --n); pcic_power_off(sc->slot); } /* * Device timeout/watchdog routine. Entered if the device neglects to * generate an interrupt after a transmit has been started on it. */ static void ze_watchdog(ifp) struct ifnet *ifp; { #if 1 struct ze_softc *sc = (struct ze_softc *)ifp; u_char isr, imr; #ifndef SMP u_int imask; #endif if(!(ifp->if_flags & IFF_UP)) return; /* select page zero */ outb (sc->nic_addr + ED_P0_CR, (inb (sc->nic_addr + ED_P0_CR) & 0x3f) | ED_CR_PAGE_0); /* read interrupt status register */ isr = inb (sc->nic_addr + ED_P0_ISR) & 0xff; /* select page two */ outb (sc->nic_addr + ED_P0_CR, (inb (sc->nic_addr + ED_P0_CR) & 0x3f) | ED_CR_PAGE_2); /* read interrupt mask register */ imr = inb (sc->nic_addr + ED_P2_IMR) & 0xff; #ifdef SMP /* INTRGET() is NOT MP_SAFE, forgo printing it for now... */ log (LOG_ERR, "ze%d: device timeout, isr=%02x, imr=%02x\n", ifp->if_unit, isr, imr); #else imask = INTRGET(); log (LOG_ERR, "ze%d: device timeout, isr=%02x, imr=%02x, imask=%04x\n", ifp->if_unit, isr, imr, imask); #endif /* SMP */ #else log(LOG_ERR, "ze%d: device timeout\n", ifp->if_unit); #endif ze_reset(ifp->if_unit); } /* * Initialize device. */ static void ze_init(unit) int unit; { struct ze_softc *sc = &ze_softc[unit]; struct ifnet *ifp = &sc->arpcom.ac_if; int i, s; pcic_power_on(sc->slot); pcic_reset(sc->slot); if(!(sc->arpcom.ac_if.if_flags & IFF_UP)) Debugger("here!!"); ze_setup(sc); /* address not known */ if (TAILQ_EMPTY(&ifp->if_addrhead)) return; /* XXX unlikely! */ /* * Initialize the NIC in the exact order outlined in the NS manual. * This init procedure is "mandatory"...don't change what or when * things happen. */ s = splnet(); /* reset transmitter flags */ sc->data_buffered = 0; sc->xmit_busy = 0; sc->arpcom.ac_if.if_timer = 0; sc->txb_next = 0; /* This variable is used below - don't move this assignment */ sc->next_packet = sc->rec_page_start + 1; /* * Set interface for page 0, Remote DMA complete, Stopped */ outb(sc->nic_addr + ED_P0_CR, ED_CR_RD2|ED_CR_STP); if (sc->memwidth == 16) { /* * Set FIFO threshold to 8, No auto-init Remote DMA, * byte order=80x86, word-wide DMA xfers */ outb(sc->nic_addr + ED_P0_DCR, ED_DCR_FT1|ED_DCR_WTS); } else { /* * Same as above, but byte-wide DMA xfers */ outb(sc->nic_addr + ED_P0_DCR, ED_DCR_FT1); } /* * Clear Remote Byte Count Registers */ outb(sc->nic_addr + ED_P0_RBCR0, 0); outb(sc->nic_addr + ED_P0_RBCR1, 0); /* * Enable reception of broadcast packets */ outb(sc->nic_addr + ED_P0_RCR, ED_RCR_AB); /* * Place NIC in internal loopback mode */ outb(sc->nic_addr + ED_P0_TCR, ED_TCR_LB0); /* * Initialize transmit/receive (ring-buffer) Page Start */ outb(sc->nic_addr + ED_P0_TPSR, sc->tx_page_start); outb(sc->nic_addr + ED_P0_PSTART, sc->rec_page_start); /* * Initialize Receiver (ring-buffer) Page Stop and Boundry */ outb(sc->nic_addr + ED_P0_PSTOP, sc->rec_page_stop); outb(sc->nic_addr + ED_P0_BNRY, sc->rec_page_start); /* * Clear all interrupts. A '1' in each bit position clears the * corresponding flag. */ outb(sc->nic_addr + ED_P0_ISR, 0xff); /* * Enable the following interrupts: receive/transmit complete, * receive/transmit error, and Receiver OverWrite. * * Counter overflow and Remote DMA complete are *not* enabled. */ outb(sc->nic_addr + ED_P0_IMR, ED_IMR_PRXE|ED_IMR_PTXE|ED_IMR_RXEE|ED_IMR_TXEE|ED_IMR_OVWE); /* * Program Command Register for page 1 */ outb(sc->nic_addr + ED_P0_CR, ED_CR_PAGE_1|ED_CR_RD2|ED_CR_STP); /* * Copy out our station address */ for (i = 0; i < ETHER_ADDR_LEN; ++i) outb(sc->nic_addr + ED_P1_PAR0 + i, sc->arpcom.ac_enaddr[i]); /* * Initialize multicast address hashing registers to accept * all multicasts (only used when in promiscuous mode) */ for (i = 0; i < 8; ++i) outb(sc->nic_addr + ED_P1_MAR0 + i, 0xff); /* * Set Current Page pointer to next_packet (initialized above) */ outb(sc->nic_addr + ED_P1_CURR, sc->next_packet); /* * Set Command Register for page 0, Remote DMA complete, * and interface Start. */ outb(sc->nic_addr + ED_P1_CR, ED_CR_RD2|ED_CR_STA); /* * Take interface out of loopback */ outb(sc->nic_addr + ED_P0_TCR, 0); /* * Set 'running' flag, and clear output active flag. */ ifp->if_flags |= IFF_RUNNING; ifp->if_flags &= ~IFF_OACTIVE; /* * ...and attempt to start output */ ze_start(ifp); (void) splx(s); } /* * This routine actually starts the transmission on the interface */ static __inline void ze_xmit(ifp) struct ifnet *ifp; { struct ze_softc *sc = ifp->if_softc; u_short len = sc->txb_next_len; /* * Set NIC for page 0 register access */ outb(sc->nic_addr + ED_P0_CR, ED_CR_RD2|ED_CR_STA); /* * Set TX buffer start page */ outb(sc->nic_addr + ED_P0_TPSR, sc->tx_page_start + sc->txb_next * ED_TXBUF_SIZE); /* * Set TX length */ outb(sc->nic_addr + ED_P0_TBCR0, len & 0xff); outb(sc->nic_addr + ED_P0_TBCR1, len >> 8); /* * Set page 0, Remote DMA complete, Transmit Packet, and *Start* */ outb(sc->nic_addr + ED_P0_CR, ED_CR_RD2|ED_CR_TXP|ED_CR_STA); sc->xmit_busy = 1; sc->data_buffered = 0; /* * Switch buffers if we are doing double-buffered transmits */ if ((sc->txb_next == 0) && (sc->txb_cnt > 1)) sc->txb_next = 1; else sc->txb_next = 0; /* * Set a timer just in case we never hear from the board again */ ifp->if_timer = 2; } /* * Start output on interface. * We make two assumptions here: * 1) that the current priority is set to splnet _before_ this code * is called *and* is returned to the appropriate priority after * return * 2) that the IFF_OACTIVE flag is checked before this code is called * (i.e. that the output part of the interface is idle) */ static void ze_start(ifp) struct ifnet *ifp; { struct ze_softc *sc = ifp->if_softc; struct mbuf *m0, *m; caddr_t buffer; int len; outloop: /* * See if there is room to send more data (i.e. one or both of the * buffers is empty). */ if (sc->data_buffered) { if (sc->xmit_busy) { /* * No room. Indicate this to the outside world * and exit. */ ifp->if_flags |= IFF_OACTIVE; return; } else { /* * Data is buffered, but we're not transmitting, so * start the xmit on the buffered data. * Note that ze_xmit() resets the data_buffered flag * before returning. */ ze_xmit(ifp); } } IF_DEQUEUE(&sc->arpcom.ac_if.if_snd, m); if (m == NULL) { /* * The following isn't pretty; we are using the !OACTIVE flag to * indicate to the outside world that we can accept an additional * packet rather than that the transmitter is _actually_ * active. Indeed, the transmitter may be active, but if we haven't * filled the secondary buffer with data then we still want to * accept more. * Note that it isn't necessary to test the data_buffered flag - * we wouldn't have tried to de-queue the packet in the first place * if it was set. */ ifp->if_flags &= ~IFF_OACTIVE; return; } /* * Copy the mbuf chain into the transmit buffer */ buffer = sc->smem_start + (sc->txb_next * ED_TXBUF_SIZE * ED_PAGE_SIZE); len = 0; for (m0 = m; m != 0; m = m->m_next) { bcopy(mtod(m, caddr_t), buffer, m->m_len); buffer += m->m_len; len += m->m_len; } sc->txb_next_len = max(len, ETHER_MIN_LEN); if (sc->txb_cnt > 1) /* * only set 'buffered' flag if doing multiple buffers */ sc->data_buffered = 1; if (sc->xmit_busy == 0) ze_xmit(ifp); /* * If there is BPF support in the configuration, tap off here. */ if (ifp->if_bpf) { bpf_mtap(ifp, m0); } m_freem(m0); /* * If we are doing double-buffering, a buffer might be free to * fill with another packet, so loop back to the top. */ if (sc->txb_cnt > 1) goto outloop; else { ifp->if_flags |= IFF_OACTIVE; return; } } /* * Ethernet interface receiver interrupt. */ static __inline void /* only called from one place, so may as well inline */ ze_rint(unit) int unit; { register struct ze_softc *sc = &ze_softc[unit]; u_char boundry; u_short len; struct ed_ring *packet_ptr; /* * Set NIC to page 1 registers to get 'current' pointer */ outb(sc->nic_addr + ED_P0_CR, ED_CR_PAGE_1|ED_CR_RD2|ED_CR_STA); /* * 'sc->next_packet' is the logical beginning of the ring-buffer - i.e. * it points to where new data has been buffered. The 'CURR' * (current) register points to the logical end of the ring-buffer * - i.e. it points to where additional new data will be added. * We loop here until the logical beginning equals the logical * end (or in other words, until the ring-buffer is empty). */ while (sc->next_packet != inb(sc->nic_addr + ED_P1_CURR)) { /* get pointer to this buffer header structure */ packet_ptr = (struct ed_ring *)(sc->smem_ring + (sc->next_packet - sc->rec_page_start) * ED_PAGE_SIZE); /* * The byte count includes the FCS - Frame Check Sequence (a * 32 bit CRC). */ len = packet_ptr->count; if ((len >= ETHER_MIN_LEN) && (len <= ETHER_MAX_LEN)) { /* * Go get packet. len - 4 removes CRC from length. * (packet_ptr + 1) points to data just after the packet ring * header (+4 bytes) */ ze_get_packet(sc, (caddr_t)(packet_ptr + 1), len - 4); ++sc->arpcom.ac_if.if_ipackets; } else { /* * Really BAD...probably indicates that the ring pointers * are corrupted. Also seen on early rev chips under * high load - the byte order of the length gets switched. */ log(LOG_ERR, "ze%d: shared memory corrupt - invalid packet length %d\n", unit, len); ze_reset(unit); return; } /* * Update next packet pointer */ sc->next_packet = packet_ptr->next_packet; /* * Update NIC boundry pointer - being careful to keep it * one buffer behind. (as recommended by NS databook) */ boundry = sc->next_packet - 1; if (boundry < sc->rec_page_start) boundry = sc->rec_page_stop - 1; /* * Set NIC to page 0 registers to update boundry register */ outb(sc->nic_addr + ED_P0_CR, ED_CR_RD2|ED_CR_STA); outb(sc->nic_addr + ED_P0_BNRY, boundry); /* * Set NIC to page 1 registers before looping to top (prepare to * get 'CURR' current pointer) */ outb(sc->nic_addr + ED_P0_CR, ED_CR_PAGE_1|ED_CR_RD2|ED_CR_STA); } } /* * Ethernet interface interrupt processor */ static void zeintr(unit) int unit; { struct ze_softc *sc = &ze_softc[unit]; u_char isr; if(!(sc->arpcom.ac_if.if_flags & IFF_UP)) return; /* * Set NIC to page 0 registers */ outb(sc->nic_addr + ED_P0_CR, ED_CR_RD2|ED_CR_STA); /* * loop until there are no more new interrupts */ while ((isr = inb(sc->nic_addr + ED_P0_ISR)) != 0) { /* * reset all the bits that we are 'acknowleging' * by writing a '1' to each bit position that was set * (writing a '1' *clears* the bit) */ outb(sc->nic_addr + ED_P0_ISR, isr); /* * Transmit error. If a TX completed with an error, we end up * throwing the packet away. Really the only error that is * possible is excessive collisions, and in this case it is * best to allow the automatic mechanisms of TCP to backoff * the flow. Of course, with UDP we're screwed, but this is * expected when a network is heavily loaded. */ if (isr & ED_ISR_TXE) { u_char tsr = inb(sc->nic_addr + ED_P0_TSR); u_char ncr = inb(sc->nic_addr + ED_P0_NCR); /* * Excessive collisions (16) */ if ((tsr & ED_TSR_ABT) && (ncr == 0)) { /* * When collisions total 16, the P0_NCR will * indicate 0, and the TSR_ABT is set. */ sc->arpcom.ac_if.if_collisions += 16; } else sc->arpcom.ac_if.if_collisions += ncr; /* * update output errors counter */ ++sc->arpcom.ac_if.if_oerrors; /* * reset tx busy and output active flags */ sc->xmit_busy = 0; sc->arpcom.ac_if.if_flags &= ~IFF_OACTIVE; /* * clear watchdog timer */ sc->arpcom.ac_if.if_timer = 0; } /* * Receiver Error. One or more of: CRC error, frame alignment error * FIFO overrun, or missed packet. */ if (isr & ED_ISR_RXE) { ++sc->arpcom.ac_if.if_ierrors; #ifdef ZE_DEBUG printf("ze%d: receive error %b\n", unit, inb(sc->nic_addr + ED_P0_RSR), "\20\8DEF\7REC DISAB\6PHY/MC\5MISSED\4OVR\3ALIGN\2FCS\1RCVD"); #endif } /* * Overwrite warning. In order to make sure that a lockup * of the local DMA hasn't occurred, we reset and * re-init the NIC. The NSC manual suggests only a * partial reset/re-init is necessary - but some * chips seem to want more. The DMA lockup has been * seen only with early rev chips - Methinks this * bug was fixed in later revs. -DG */ if (isr & ED_ISR_OVW) { ++sc->arpcom.ac_if.if_ierrors; /* * Stop/reset/re-init NIC */ ze_reset(unit); } /* * Transmission completed normally. */ if (isr & ED_ISR_PTX) { /* * reset tx busy and output active flags */ sc->xmit_busy = 0; sc->arpcom.ac_if.if_flags &= ~IFF_OACTIVE; /* * clear watchdog timer */ sc->arpcom.ac_if.if_timer = 0; /* * Update total number of successfully transmitted * packets. */ ++sc->arpcom.ac_if.if_opackets; /* * Add in total number of collisions on last * transmission. */ sc->arpcom.ac_if.if_collisions += inb(sc->nic_addr + ED_P0_TBCR0); } /* * Receive Completion. Go and get the packet. * XXX - Doing this on an error is dubious because there * shouldn't be any data to get (we've configured the * interface to not accept packets with errors). */ if (isr & (ED_ISR_PRX|ED_ISR_RXE)) { ze_rint (unit); } /* * If it looks like the transmitter can take more data, * attempt to start output on the interface. If data is * already buffered and ready to go, send it first. */ if ((sc->arpcom.ac_if.if_flags & IFF_OACTIVE) == 0) { if (sc->data_buffered) ze_xmit(&sc->arpcom.ac_if); ze_start(&sc->arpcom.ac_if); } /* * return NIC CR to standard state: page 0, remote DMA complete, * start (toggling the TXP bit off, even if was just set * in the transmit routine, is *okay* - it is 'edge' * triggered from low to high) */ outb(sc->nic_addr + ED_P0_CR, ED_CR_RD2|ED_CR_STA); /* * If the Network Talley Counters overflow, read them to * reset them. It appears that old 8390's won't * clear the ISR flag otherwise - resulting in an * infinite loop. */ if (isr & ED_ISR_CNT) { (void) inb(sc->nic_addr + ED_P0_CNTR0); (void) inb(sc->nic_addr + ED_P0_CNTR1); (void) inb(sc->nic_addr + ED_P0_CNTR2); } } } /* * Process an ioctl request. This code needs some work - it looks * pretty ugly. */ static int ze_ioctl(ifp, command, data) register struct ifnet *ifp; u_long command; caddr_t data; { struct ze_softc *sc = ifp->if_softc; int s, error = 0; s = splnet(); switch (command) { case SIOCSIFADDR: case SIOCGIFADDR: case SIOCSIFMTU: error = ether_ioctl(ifp, command, data); break; case SIOCSIFFLAGS: /* * When the card is offlined, `up' operation can't be permitted */ if (!sc->last_alive) { int tmp; tmp = (ifp->if_flags & IFF_UP); if (!sc->last_up && (ifp->if_flags & IFF_UP)) { ifp->if_flags &= ~(IFF_UP); } sc->last_up = tmp; } /* * If interface is marked down and it is running, then stop it */ if (((ifp->if_flags & IFF_UP) == 0) && (ifp->if_flags & IFF_RUNNING)) { ze_stop(ifp->if_unit); ifp->if_flags &= ~IFF_RUNNING; } else { /* * If interface is marked up and it is stopped, then start it */ if ((ifp->if_flags & IFF_UP) && ((ifp->if_flags & IFF_RUNNING) == 0)) ze_init(ifp->if_unit); } if (ifp->if_flags & IFF_PROMISC) { /* * Set promiscuous mode on interface. * XXX - for multicasts to work, we would need to * write 1's in all bits of multicast * hashing array. For now we assume that * this was done in ze_init(). */ outb(sc->nic_addr + ED_P0_RCR, ED_RCR_PRO|ED_RCR_AM|ED_RCR_AB); } else { /* * XXX - for multicasts to work, we would need to * rewrite the multicast hashing array with the * proper hash (would have been destroyed above). */ outb(sc->nic_addr + ED_P0_RCR, ED_RCR_AB); } break; default: error = EINVAL; } (void) splx(s); return (error); } /* * Macro to calculate a new address within shared memory when given an offset * from an address, taking into account ring-wrap. */ #define ringoffset(sc, start, off, type) \ ((type)( ((caddr_t)(start)+(off) >= (sc)->smem_end) ? \ (((caddr_t)(start)+(off))) - (sc)->smem_end \ + (sc)->smem_ring: \ ((caddr_t)(start)+(off)) )) /* * Retreive packet from shared memory and send to the next level up via * ether_input(). If there is a BPF listener, give a copy to BPF, too. */ static void ze_get_packet(sc, buf, len) struct ze_softc *sc; char *buf; u_short len; { struct ether_header *eh; struct mbuf *m, *head = NULL; /* Allocate a header mbuf */ MGETHDR(m, M_DONTWAIT, MT_DATA); if (m == NULL) goto bad; m->m_pkthdr.rcvif = &sc->arpcom.ac_if; m->m_pkthdr.len = len; m->m_len = 0; head = m; eh = (struct ether_header *)buf; /* The following sillines is to make NFS happy */ #define EROUND ((sizeof(struct ether_header) + 3) & ~3) #define EOFF (EROUND - sizeof(struct ether_header)) /* * The following assumes there is room for * the ether header in the header mbuf */ head->m_data += EOFF; bcopy(buf, mtod(head, caddr_t), sizeof(struct ether_header)); buf += sizeof(struct ether_header); head->m_len += sizeof(struct ether_header); len -= sizeof(struct ether_header); /* * Pull packet off interface. Or if this was a trailer packet, * the data portion is appended. */ m = ze_ring_to_mbuf(sc, buf, m, len); if (m == NULL) goto bad; /* * Check if there's a BPF listener on this interface. * If so, hand off the raw packet to bpf. */ if (sc->arpcom.ac_if.if_bpf) { bpf_mtap(&sc->arpcom.ac_if, head); /* * Note that the interface cannot be in promiscuous mode if * there are no BPF listeners. And if we are in promiscuous * mode, we have to check if this packet is really ours. * * XXX This test does not support multicasts. */ if ((sc->arpcom.ac_if.if_flags & IFF_PROMISC) && bcmp(eh->ether_dhost, sc->arpcom.ac_enaddr, sizeof(eh->ether_dhost)) != 0 && bcmp(eh->ether_dhost, etherbroadcastaddr, sizeof(eh->ether_dhost)) != 0) { m_freem(head); return; } } /* * Fix up data start offset in mbuf to point past ether header */ m_adj(head, sizeof(struct ether_header)); ether_input(&sc->arpcom.ac_if, eh, head); return; bad: if (head) m_freem(head); return; } /* * Supporting routines */ /* * Given a source and destination address, copy 'amount' of a packet from * the ring buffer into a linear destination buffer. Takes into account * ring-wrap. */ static __inline char * ze_ring_copy(sc,src,dst,amount) struct ze_softc *sc; char *src; char *dst; u_short amount; { u_short tmp_amount; /* does copy wrap to lower addr in ring buffer? */ if (src + amount > sc->smem_end) { tmp_amount = sc->smem_end - src; bcopy(src,dst,tmp_amount); /* copy amount up to end of smem */ amount -= tmp_amount; src = sc->smem_ring; dst += tmp_amount; } bcopy(src, dst, amount); return(src + amount); } /* * Copy data from receive buffer to end of mbuf chain * allocate additional mbufs as needed. return pointer * to last mbuf in chain. * sc = ze info (softc) * src = pointer in ze ring buffer * dst = pointer to last mbuf in mbuf chain to copy to * amount = amount of data to copy */ static struct mbuf * ze_ring_to_mbuf(sc,src,dst,total_len) struct ze_softc *sc; char *src; struct mbuf *dst; u_short total_len; { register struct mbuf *m = dst; while (total_len) { register u_short amount = min(total_len, M_TRAILINGSPACE(m)); if (amount == 0) { /* no more data in this mbuf, alloc another */ /* * If there is enough data for an mbuf cluster, attempt * to allocate one of those, otherwise, a regular * mbuf will do. * Note that a regular mbuf is always required, even if * we get a cluster - getting a cluster does not * allocate any mbufs, and one is needed to assign * the cluster to. The mbuf that has a cluster * extension can not be used to contain data - only * the cluster can contain data. */ dst = m; MGET(m, M_DONTWAIT, MT_DATA); if (m == NULL) return (0); if (total_len >= MINCLSIZE) MCLGET(m, M_DONTWAIT); m->m_len = 0; dst->m_next = m; amount = min(total_len, M_TRAILINGSPACE(m)); } src = ze_ring_copy(sc, src, mtod(m, caddr_t) + m->m_len, amount); m->m_len += amount; total_len -= amount; } return (m); } #endif