/*- * 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. */ #include "ze.h" #if NZE > 0 #include "bpfilter.h" #include "param.h" #include "systm.h" #include "errno.h" #include "ioctl.h" #include "mbuf.h" #include "socket.h" #include "syslog.h" #include "net/if.h" #include "net/if_dl.h" #include "net/if_types.h" #include "net/netisr.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 #if NBPFILTER > 0 #include "net/bpf.h" #include "net/bpfdesc.h" #endif #include "i386/isa/isa.h" #include "i386/isa/isa_device.h" #include "i386/isa/icu.h" #include "i386/isa/if_zereg.h" #include "i386/include/pio.h" /***************************************************************************** * pcmcia controller chip (PCIC) support * * (eventually, move this to a separate file) * *****************************************************************************/ #include "ic/i82365.h" /* * Each PCIC chip (82365SL or clone) can handle two card slots, and there * can be up to four PCICs in a system. (On some machines, not all of the * address lines are decoded, so a card may appear to be in more than one * slot.) */ #define MAXSLOT 8 /* * To access a register on the PCIC for a particular slot, you * first write the correct OFFSET value for that slot in the * INDEX register for the PCIC controller. You then read or write * the value from or to the DATA register for that controller. * * The first pair of chips shares I/O addresss for DATA and INDEX, * as does the second pair. (To the programmer, it looks like each * pair is a single chip.) The i/o port addresses are hard-wired * into the PCIC; so the following addresses should be valid for * any machine that uses this chip. */ #define PCIC_INDEX_0 0x3E0 /* index reg, chips 0 and 1 */ #define PCIC_DATA_0 0x3E1 /* data register, chips 0 and 1 */ #define PCIC_INDEX_1 0x3E2 /* index reg, chips 1 and 2 */ #define PCIC_DATA_1 0x3E3 /* data register, chips 1 and 2 */ /* * Given a slot number, calculate the INDEX and DATA registers * to talk to that slot. OFFSET is added to the register number * to address the registers for a particular slot. */ #define INDEX(slot) ((slot) < 4 ? PCIC_INDEX_0 : PCIC_INDEX_1) #define DATA(slot) ((slot) < 4 ? PCIC_DATA_0 : PCIC_DATA_1) #define OFFSET(slot) ((slot) % 4 * 0x40) /* * There are 5 sets (windows) of memory mapping registers on the PCIC chip * for each slot, numbered 0..4. * * They start at 10/50 hex within the chip's register space (not system * I/O space), and are eight addresses apart. These are actually pairs of * 8-bit-wide registers (low byte first, then high byte) since the * address fields are actually 12 bits long. The upper bits are used * for other things like 8/16-bit select and wait states. * * Memory mapping registers include start/stop addresses to define the * region to be mapped (in terms of system memory addresses), and * an offset register to allow for translation from system space * to card space. The lower 12 bits aren't included in these, so memory is * mapped in 4K chunks. */ #define MEM_START_ADDR(window) (((window) * 0x08) + 0x10) #define MEM_STOP_ADDR(window) (((window) * 0x08) + 0x12) #define MEM_OFFSET(window) (((window) * 0x08) + 0x14) /* * this bit gets set in the address window enable register (PCIC_ADDRWINE) * to enable a particular address window. */ #define MEM_ENABLE_BIT(window) ((1) << (window)) /* * There are two i/o port addressing windows. I/O ports cannot be * relocated within system i/o space (unless the card doesn't decode * all of the address bits); unlike card memory, there is no address * translation offset. */ #define IO_START_ADDR(window) ((window) ? PCIC_IO1_STL : PCIC_IO0_STL) #define IO_STOP_ADDR(window) ((window) ? PCIC_IO1_SPL : PCIC_IO0_SPL) #define IO_ENABLE_BIT(window) ((window) ? PCIC_IO1_EN : PCIC_IO0_EN) #define IO_CS16_BIT(window) ((window) ? PCIC_IO1_CS16 : PCIC_IO0_CS16) /* * read a byte from a pcic register for a particular slot */ static inline unsigned char pcic_getb (int slot, int reg) { outb (INDEX(slot), OFFSET (slot) + reg); return inb (DATA (slot)); } /* * write a byte to a pcic register for a particular slot */ static inline void pcic_putb (int slot, int reg, unsigned char val) { outb (INDEX(slot), OFFSET (slot) + reg); outb (DATA (slot), val); } /* * read a word from a pcic register for a particular slot */ static inline unsigned short pcic_getw (int slot, int reg) { return pcic_getb (slot, reg) | (pcic_getb (slot, reg+1) << 8); } /* * write a word to a pcic register at a particular slot */ static inline void pcic_putw (int slot, int reg, unsigned short val) { pcic_putb (slot, reg, val & 0xff); pcic_putb (slot, reg + 1, (val >> 8) & 0xff); } static void pcic_print_regs (int slot) { int i, j; for (i = 0; i < 0x40; i += 16) { for (j = 0; j < 16; ++j) printf ("%02x ", pcic_getb (slot, i + j)); printf ("\n"); } } /* * map a portion of the card's memory space into system memory * space. * * slot = # of the slot the card is plugged into * window = which pcic memory map registers to use (0..4) * sys_addr = base system PHYSICAL memory address where we want it. must * be on an appropriate boundary (lower 12 bits are zero). * card_addr = the base address of the card's memory to correspond * to sys_addr * length = length of the segment to map (may be rounded up as necessary) * type = which card memory space to map (attribute or shared) * width = 1 for byte-wide mapping; 2 for word (16-bit) mapping. */ enum memtype { COMMON, ATTRIBUTE }; static void pcic_map_memory (int slot, int window, unsigned long sys_addr, unsigned long card_addr, unsigned long length, enum memtype type, int width) { unsigned short offset; unsigned short mem_start_addr; unsigned short mem_stop_addr; sys_addr >>= 12; card_addr >>= 12; length >>= 12; /* * compute an offset for the chip such that * (sys_addr + offset) = card_addr * but the arithmetic is done modulo 2^14 */ offset = (card_addr - sys_addr) & 0x3FFF; /* * now OR in the bit for "attribute memory" if necessary */ if (type == ATTRIBUTE) { offset |= (PCIC_REG << 8); /* REG == "region active" pin on card */ } /* * okay, set up the chip memory mapping registers, and turn * on the enable bit for this window. * if we are doing 16-bit wide accesses (width == 2), * turn on the appropriate bit. * * XXX for now, we set all of the wait state bits to zero. * Not really sure how they should be set. */ mem_start_addr = sys_addr & 0xFFF; if (width == 2) mem_start_addr |= (PCIC_DATA16 << 8); mem_stop_addr = (sys_addr + length) & 0xFFF; pcic_putw (slot, MEM_START_ADDR(window), mem_start_addr); pcic_putw (slot, MEM_STOP_ADDR(window), mem_stop_addr); pcic_putw (slot, MEM_OFFSET(window), offset); /* * Assert the bit (PCIC_MEMCS16) that says to decode all of * the address lines. */ pcic_putb (slot, PCIC_ADDRWINE, pcic_getb (slot, PCIC_ADDRWINE) | MEM_ENABLE_BIT(window) | PCIC_MEMCS16); } static void pcic_unmap_memory (int slot, int window) { /* * seems like we need to turn off the enable bit first, after which * we can clear the registers out just to be sure. */ pcic_putb (slot, PCIC_ADDRWINE, pcic_getb (slot, PCIC_ADDRWINE) & ~MEM_ENABLE_BIT(window)); pcic_putw (slot, MEM_START_ADDR(window), 0); pcic_putw (slot, MEM_STOP_ADDR(window), 0); pcic_putw (slot, MEM_OFFSET(window), 0); } /* * map a range of addresses into system i/o space * (no translation of i/o addresses is possible) * * 'width' is: * + 0 to tell the PCIC to generate the ISA IOCS16* signal from * the PCMCIA IOIS16* signal. * + 1 to select 8-bit width * + 2 to select 16-bit width */ static void pcic_map_io (int slot, int window, unsigned short base, unsigned short length, unsigned short width) { unsigned char x; pcic_putw (slot, IO_START_ADDR(window), base); pcic_putw (slot, IO_STOP_ADDR(window), base+length-1); /* * select the bits that determine whether * an i/o operation is 8 or 16 bits wide */ x = pcic_getb (slot, PCIC_IOCTL); switch (width) { case 0: /* PCMCIA card decides */ if (window) x = (x & 0xf0) | PCIC_IO1_CS16; else x = (x & 0x0f) | PCIC_IO0_CS16; break; case 1: /* 8 bits wide */ break; case 2: /* 16 bits wide */ if (window) x = (x & 0xf0) | PCIC_IO1_16BIT; else x = (x & 0x0f) | PCIC_IO0_16BIT; break; } pcic_putb (slot, PCIC_IOCTL, x); pcic_putb (slot, PCIC_ADDRWINE, pcic_getb (slot, PCIC_ADDRWINE) | IO_ENABLE_BIT(window)); } #ifdef TEST static void pcic_unmap_io (int slot, int window) { pcic_putb (slot, PCIC_ADDRWINE, pcic_getb (slot, PCIC_ADDRWINE) & ~IO_ENABLE_BIT(window)); pcic_putw (slot, IO_START_ADDR(window), 0); pcic_putw (slot, IO_STOP_ADDR(window), 0); } #endif /* TEST */ /* * tell the PCIC which irq we want to use. only the following are legal: * 3, 4, 5, 7, 9, 10, 11, 12, 14, 15 * * NB: 'irq' is an interrupt NUMBER, not a MASK as in struct isa_device. */ static void pcic_map_irq (int slot, int irq) { if (irq < 3 || irq == 6 || irq == 8 || irq == 13 || irq > 15) { printf ("ze: pcic_map_irq (slot %d): illegal irq %d\n", slot, irq); return; } pcic_putb (slot, PCIC_INT_GEN, pcic_getb (slot, PCIC_INT_GEN) | (irq & 0x0F)); } static void pcic_power_on (int slot) { pcic_putb (slot, PCIC_POWER, pcic_getb (slot, PCIC_POWER) | PCIC_DISRST | PCIC_PCPWRE); DELAY (50000); pcic_putb (slot, PCIC_POWER, pcic_getb (slot, PCIC_POWER) | PCIC_OUTENA); } static void pcic_reset (int slot) { /* assert RESET (by clearing a bit!), wait a bit, and de-assert it */ pcic_putb (slot, PCIC_INT_GEN, pcic_getb (slot, PCIC_INT_GEN) & ~PCIC_CARDRESET); DELAY (50000); pcic_putb (slot, PCIC_INT_GEN, pcic_getb (slot, PCIC_INT_GEN) | PCIC_CARDRESET); } /***************************************************************************** * Driver for Ethernet Adapter * *****************************************************************************/ /* * ze_softc: per line info and status */ struct ze_softc { struct arpcom arpcom; /* ethernet common */ char *type_str; /* pointer to type string */ char *mau; /* type of media access unit */ #if 0 u_char vendor; /* interface vendor */ u_char type; /* interface type code */ #endif #if 0 u_short vector; /* interrupt vector */ #endif 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) */ caddr_t bpf; /* BPF "magic cookie" */ 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 */ } ze_softc[NZE]; int ze_attach(), ze_ioctl(), ze_probe(); void ze_init(), ze_start(), ze_stop(), ze_intr(); void ze_reset(), ze_watchdog(), ze_get_packet(); static inline void ze_rint(); static inline void ze_xmit(); static inline char *ze_ring_copy(); extern int ether_output(); struct isa_driver zedriver = { ze_probe, ze_attach, "ze" }; #define ETHER_MIN_LEN 64 #define ETHER_MAX_LEN 1518 #define ETHER_ADDR_LEN 6 #define ETHER_HDR_SIZE 14 static unsigned char enet_addr[6]; static unsigned char card_info[256]; #define CARD_INFO "IBM Corp.~Ethernet~0933495" /* * 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'; return (memcmp (card_info, CARD_INFO, sizeof(CARD_INFO)-1) == 0); } 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 ze_find_adapter (unsigned char *scratch) { int slot; for (slot = 0; 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 */ unsigned char idbyte = pcic_getb (slot, PCIC_ID_REV); if (idbyte != 0x82 && idbyte != 0x83 && 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) { printf ("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 */ printf ("ze: found card in slot %d\n", slot); return slot; } else printf ("ze: pcmcia slot %d: %s\n", slot, card_info); pcic_unmap_memory (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) */ int ze_probe(isa_dev) struct isa_device *isa_dev; { struct ze_softc *sc = &ze_softc[isa_dev->id_unit]; int i, x; u_int memsize; u_char iptr, memwidth, sum, tmp; int slot; if ((slot = ze_find_adapter (isa_dev->id_maddr)) < 0) return NULL; /* * 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); /* * (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 (isa_dev->id_maddr), 0x20000, 8L, ATTRIBUTE, 1); POKE(isa_dev->id_maddr, 0x80); /* reset the card (how long?) */ DELAY (10000); /* * 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(isa_dev->id_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 (isa_dev->id_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, isa_dev->id_iobase, 32, 1); #else pcic_map_io (slot, 0, isa_dev->id_iobase, 16, 1); pcic_map_io (slot, 1, isa_dev->id_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 (isa_dev->id_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 /* * Setup i/o addresses */ sc->nic_addr = isa_dev->id_iobase; #if 0 sc->vector = isa_dev->id_irq; #endif sc->smem_start = (caddr_t)isa_dev->id_maddr; #if 0 sc->vendor = ZE_VENDOR_IBM; sc->type = xxx; #endif /* reset card to force it into a known state */ tmp = inb (isa_dev->id_iobase + ZE_RESET); DELAY(5000); outb (isa_dev->id_iobase + ZE_RESET, tmp); DELAY(5000); /* * query MAM bit in misc register for 10base2 */ tmp = inb (isa_dev->id_iobase + ZE_MISC); 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 + (ZE_PAGE_SIZE * ZE_TXBUF_SIZE); sc->txb_cnt = 1; sc->rec_page_start = ZE_TXBUF_SIZE + ZE_PAGE_OFFSET; sc->smem_size = memsize; sc->smem_end = sc->smem_start + memsize; sc->rec_page_stop = memsize / ZE_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; return 32; } /* * Install interface into kernel networking data structures */ 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; struct ifaddr *ifa; struct sockaddr_dl *sdl; /* * Set interface to stopped condition (reset) */ ze_stop(isa_dev->id_unit); /* * Initialize ifnet structure */ ifp->if_unit = isa_dev->id_unit; ifp->if_name = "ze" ; ifp->if_mtu = ETHERMTU; ifp->if_init = ze_init; ifp->if_output = ether_output; ifp->if_start = ze_start; ifp->if_ioctl = ze_ioctl; ifp->if_reset = ze_reset; ifp->if_watchdog = ze_watchdog; /* * Set default state for LLC0 flag (used to disable the tranceiver * for AUI operation), based on compile-time config option. */ if (isa_dev->id_flags & ZE_FLAGS_DISABLE_TRANCEIVER) ifp->if_flags = (IFF_BROADCAST | IFF_SIMPLEX | IFF_NOTRAILERS | IFF_LLC0); else ifp->if_flags = (IFF_BROADCAST | IFF_SIMPLEX | IFF_NOTRAILERS); /* * Attach the interface */ if_attach(ifp); /* * Search down the ifa address list looking for the AF_LINK type entry */ ifa = ifp->if_addrlist; while ((ifa != 0) && (ifa->ifa_addr != 0) && (ifa->ifa_addr->sa_family != AF_LINK)) ifa = ifa->ifa_next; /* * If we find an AF_LINK type entry we fill in the hardware address. * This is useful for netstat(1) to keep track of which interface * is which. */ if ((ifa != 0) && (ifa->ifa_addr != 0)) { /* * Fill in the link-level address for this interface */ sdl = (struct sockaddr_dl *)ifa->ifa_addr; sdl->sdl_type = IFT_ETHER; sdl->sdl_alen = ETHER_ADDR_LEN; sdl->sdl_slen = 0; bcopy(sc->arpcom.ac_enaddr, LLADDR(sdl), ETHER_ADDR_LEN); } /* * Print additional info when attached */ printf("ze%d: address %s, type %s (%dbit)%s, MAU %s\n", isa_dev->id_unit, ether_sprintf(sc->arpcom.ac_enaddr), sc->type_str, sc->memwidth, (ifp->if_flags & IFF_LLC0 ? " [tranceiver disabled]" : ""), sc->mau); /* * If BPF is in the kernel, call the attach for it */ #if NBPFILTER > 0 bpfattach(&sc->bpf, ifp, DLT_EN10MB, sizeof(struct ether_header)); #endif return 1; } /* * Reset interface. */ 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. */ 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 + ZE_P0_CR, ZE_CR_RD2|ZE_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 + ZE_P0_ISR) & ZE_ISR_RST) == 0) && --n); } /* * Device timeout/watchdog routine. Entered if the device neglects to * generate an interrupt after a transmit has been started on it. */ void ze_watchdog(unit) int unit; { #if 1 struct ze_softc *sc = &ze_softc[unit]; u_char isr, imr; u_short imask; /* select page zero */ outb (sc->nic_addr + ZE_P0_CR, (inb (sc->nic_addr + ZE_P0_CR) & 0x3f) | ZE_CR_PAGE_0); /* read interrupt status register */ isr = inb (sc->nic_addr + ZE_P0_ISR) & 0xff; /* select page two */ outb (sc->nic_addr + ZE_P0_CR, (inb (sc->nic_addr + ZE_P0_CR) & 0x3f) | ZE_CR_PAGE_2); /* read interrupt mask register */ imr = inb (sc->nic_addr + ZE_P2_IMR) & 0xff; imask = inb(IO_ICU2) << 8 | inb(IO_ICU1); log (LOG_ERR, "ze%d: device timeout, isr=%02x, imr=%02x, imask=%04x\n", unit, isr, imr, imask); #else log(LOG_ERR, "ze%d: device timeout\n", unit); #endif ze_reset(unit); } /* * Initialize device. */ void ze_init(unit) int unit; { struct ze_softc *sc = &ze_softc[unit]; struct ifnet *ifp = &sc->arpcom.ac_if; int i, s; u_char command; /* address not known */ if (ifp->if_addrlist == (struct ifaddr *)0) return; /* * 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 + ZE_P0_CR, ZE_CR_RD2|ZE_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 + ZE_P0_DCR, ZE_DCR_FT1|ZE_DCR_WTS); } else { /* * Same as above, but byte-wide DMA xfers */ outb(sc->nic_addr + ZE_P0_DCR, ZE_DCR_FT1); } /* * Clear Remote Byte Count Registers */ outb(sc->nic_addr + ZE_P0_RBCR0, 0); outb(sc->nic_addr + ZE_P0_RBCR1, 0); /* * Enable reception of broadcast packets */ outb(sc->nic_addr + ZE_P0_RCR, ZE_RCR_AB); /* * Place NIC in internal loopback mode */ outb(sc->nic_addr + ZE_P0_TCR, ZE_TCR_LB0); /* * Initialize transmit/receive (ring-buffer) Page Start */ outb(sc->nic_addr + ZE_P0_TPSR, sc->tx_page_start); outb(sc->nic_addr + ZE_P0_PSTART, sc->rec_page_start); /* * Initialize Receiver (ring-buffer) Page Stop and Boundry */ outb(sc->nic_addr + ZE_P0_PSTOP, sc->rec_page_stop); outb(sc->nic_addr + ZE_P0_BNRY, sc->rec_page_start); /* * Clear all interrupts. A '1' in each bit position clears the * corresponding flag. */ outb(sc->nic_addr + ZE_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 + ZE_P0_IMR, ZE_IMR_PRXE|ZE_IMR_PTXE|ZE_IMR_RXEE|ZE_IMR_TXEE|ZE_IMR_OVWE); /* * Program Command Register for page 1 */ outb(sc->nic_addr + ZE_P0_CR, ZE_CR_PAGE_1|ZE_CR_RD2|ZE_CR_STP); /* * Copy out our station address */ for (i = 0; i < ETHER_ADDR_LEN; ++i) outb(sc->nic_addr + ZE_P1_PAR0 + i, sc->arpcom.ac_enaddr[i]); #if NBPFILTER > 0 /* * 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 + ZE_P1_MAR0 + i, 0xff); #endif /* * Set Current Page pointer to next_packet (initialized above) */ outb(sc->nic_addr + ZE_P1_CURR, sc->next_packet); /* * Set Command Register for page 0, Remote DMA complete, * and interface Start. */ outb(sc->nic_addr + ZE_P1_CR, ZE_CR_RD2|ZE_CR_STA); /* * Take interface out of loopback */ outb(sc->nic_addr + ZE_P0_TCR, 0); #if 0 /* * If this is a 3Com board, the tranceiver must be software enabled * (there is no settable hardware default). */ if (sc->vendor == ZE_VENDOR_3COM) { if (ifp->if_flags & IFF_LLC0) { outb(sc->asic_addr + ZE_3COM_CR, 0); } else { outb(sc->asic_addr + ZE_3COM_CR, ZE_3COM_CR_XSEL); } } #endif /* * 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 = &ze_softc[ifp->if_unit]; u_short len = sc->txb_next_len; /* * Set NIC for page 0 register access */ outb(sc->nic_addr + ZE_P0_CR, ZE_CR_RD2|ZE_CR_STA); /* * Set TX buffer start page */ outb(sc->nic_addr + ZE_P0_TPSR, sc->tx_page_start + sc->txb_next * ZE_TXBUF_SIZE); /* * Set TX length */ outb(sc->nic_addr + ZE_P0_TBCR0, len & 0xff); outb(sc->nic_addr + ZE_P0_TBCR1, len >> 8); /* * Set page 0, Remote DMA complete, Transmit Packet, and *Start* */ outb(sc->nic_addr + ZE_P0_CR, ZE_CR_RD2|ZE_CR_TXP|ZE_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) */ void ze_start(ifp) struct ifnet *ifp; { struct ze_softc *sc = &ze_softc[ifp->if_unit]; struct mbuf *m0, *m; caddr_t buffer; int len; u_char laar_tmp; 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 */ #if 0 /* * Enable 16bit access to shared memory on WD/SMC boards */ if (sc->memwidth == 16) if (sc->vendor == ZE_VENDOR_WD_SMC) { laar_tmp = inb(sc->asic_addr + ZE_WD_LAAR); outb(sc->asic_addr + ZE_WD_LAAR, laar_tmp | ZE_WD_LAAR_M16EN); } #endif buffer = sc->smem_start + (sc->txb_next * ZE_TXBUF_SIZE * ZE_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; } #if 0 /* * Restore previous shared mem access type */ if (sc->memwidth == 16) if (sc->vendor == ZE_VENDOR_WD_SMC) { outb(sc->asic_addr + ZE_WD_LAAR, laar_tmp); } #endif 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. * The following has support for converting trailer packets * back to normal. */ #if NBPFILTER > 0 if (sc->bpf) { u_short etype; int off, datasize, resid; struct ether_header *eh; struct trailer_header { u_short ether_type; u_short ether_residual; } trailer_header; char ether_packet[ETHER_MAX_LEN]; char *ep; ep = ether_packet; /* * We handle trailers below: * Copy ether header first, then residual data, * then data. Put all this in a temporary buffer * 'ether_packet' and send off to bpf. Since the * system has generated this packet, we assume * that all of the offsets in the packet are * correct; if they're not, the system will almost * certainly crash in m_copydata. * We make no assumptions about how the data is * arranged in the mbuf chain (i.e. how much * data is in each mbuf, if mbuf clusters are * used, etc.), which is why we use m_copydata * to get the ether header rather than assume * that this is located in the first mbuf. */ /* copy ether header */ m_copydata(m0, 0, sizeof(struct ether_header), ep); eh = (struct ether_header *) ep; ep += sizeof(struct ether_header); etype = ntohs(eh->ether_type); if (etype >= ETHERTYPE_TRAIL && etype < ETHERTYPE_TRAIL+ETHERTYPE_NTRAILER) { datasize = ((etype - ETHERTYPE_TRAIL) << 9); off = datasize + sizeof(struct ether_header); /* copy trailer_header into a data structure */ m_copydata(m0, off, sizeof(struct trailer_header), &trailer_header.ether_type); /* copy residual data */ m_copydata(m0, off+sizeof(struct trailer_header), resid = ntohs(trailer_header.ether_residual) - sizeof(struct trailer_header), ep); ep += resid; /* copy data */ m_copydata(m0, sizeof(struct ether_header), datasize, ep); ep += datasize; /* restore original ether packet type */ eh->ether_type = trailer_header.ether_type; bpf_tap(sc->bpf, ether_packet, ep - ether_packet); } else bpf_mtap(sc->bpf, m0); } #endif 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 integrate */ ze_rint(unit) int unit; { register struct ze_softc *sc = &ze_softc[unit]; u_char boundry, current; u_short len; struct ze_ring *packet_ptr; /* * Set NIC to page 1 registers to get 'current' pointer */ outb(sc->nic_addr + ZE_P0_CR, ZE_CR_PAGE_1|ZE_CR_RD2|ZE_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 + ZE_P1_CURR)) { /* get pointer to this buffer header structure */ packet_ptr = (struct ze_ring *)(sc->smem_ring + (sc->next_packet - sc->rec_page_start) * ZE_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 + ZE_P0_CR, ZE_CR_RD2|ZE_CR_STA); outb(sc->nic_addr + ZE_P0_BNRY, boundry); /* * Set NIC to page 1 registers before looping to top (prepare to * get 'CURR' current pointer) */ outb(sc->nic_addr + ZE_P0_CR, ZE_CR_PAGE_1|ZE_CR_RD2|ZE_CR_STA); } } /* * Ethernet interface interrupt processor */ void zeintr(unit) int unit; { struct ze_softc *sc = &ze_softc[unit]; u_char isr; /* * Set NIC to page 0 registers */ outb(sc->nic_addr + ZE_P0_CR, ZE_CR_RD2|ZE_CR_STA); /* * loop until there are no more new interrupts */ while (isr = inb(sc->nic_addr + ZE_P0_ISR)) { /* * 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 + ZE_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 & ZE_ISR_TXE) { u_char tsr = inb(sc->nic_addr + ZE_P0_TSR); u_char ncr = inb(sc->nic_addr + ZE_P0_NCR); /* * Excessive collisions (16) */ if ((tsr & ZE_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 & ZE_ISR_RXE) { ++sc->arpcom.ac_if.if_ierrors; #ifdef ZE_DEBUG #if 0 printf("ze%d: receive error %x\n", unit, inb(sc->nic_addr + ZE_P0_RSR)); #else printf("ze%d: receive error %b\n", unit, inb(sc->nic_addr + ZE_P0_RSR), "\20\8DEF\7REC DISAB\6PHY/MC\5MISSED\4OVR\3ALIGN\2FCS\1RCVD"); #endif #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 & ZE_ISR_OVW) { ++sc->arpcom.ac_if.if_ierrors; #if 0 /* sigh. this happens too often on our net */ log(LOG_WARNING, "ze%d: warning - receiver ring buffer overrun\n", unit); #endif /* * Stop/reset/re-init NIC */ ze_reset(unit); } /* * Transmission completed normally. */ if (isr & ZE_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 + ZE_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 & (ZE_ISR_PRX|ZE_ISR_RXE)) { #if 0 /* * Enable access to shared memory on WD/SMC boards */ if (sc->memwidth == 16) if (sc->vendor == ZE_VENDOR_WD_SMC) { outb(sc->asic_addr + ZE_WD_LAAR, inb(sc->asic_addr + ZE_WD_LAAR) | ZE_WD_LAAR_M16EN); } #endif ze_rint (unit); #if 0 /* * Disable access to shared memory */ if (sc->memwidth == 16) if (sc->vendor == ZE_VENDOR_WD_SMC) { outb(sc->asic_addr + ZE_WD_LAAR, inb(sc->asic_addr + ZE_WD_LAAR) & ~ZE_WD_LAAR_M16EN); } #endif } /* * 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 + ZE_P0_CR, ZE_CR_RD2|ZE_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 & ZE_ISR_CNT) { (void) inb(sc->nic_addr + ZE_P0_CNTR0); (void) inb(sc->nic_addr + ZE_P0_CNTR1); (void) inb(sc->nic_addr + ZE_P0_CNTR2); } } } /* * Process an ioctl request. This code needs some work - it looks * pretty ugly. */ int ze_ioctl(ifp, command, data) register struct ifnet *ifp; int command; caddr_t data; { register struct ifaddr *ifa = (struct ifaddr *)data; struct ze_softc *sc = &ze_softc[ifp->if_unit]; struct ifreq *ifr = (struct ifreq *)data; int s, error = 0; s = splnet(); switch (command) { case SIOCSIFADDR: ifp->if_flags |= IFF_UP; switch (ifa->ifa_addr->sa_family) { #ifdef INET case AF_INET: ze_init(ifp->if_unit); /* before arpwhohas */ /* * See if another station has *our* IP address. * i.e.: There is an address conflict! If a * conflict exists, a message is sent to the * console. */ ((struct arpcom *)ifp)->ac_ipaddr = IA_SIN(ifa)->sin_addr; arpwhohas((struct arpcom *)ifp, &IA_SIN(ifa)->sin_addr); break; #endif #ifdef NS /* * XXX - This code is probably wrong */ case AF_NS: { register struct ns_addr *ina = &(IA_SNS(ifa)->sns_addr); if (ns_nullhost(*ina)) ina->x_host = *(union ns_host *)(sc->arpcom.ac_enaddr); else { /* * */ bcopy((caddr_t)ina->x_host.c_host, (caddr_t)sc->arpcom.ac_enaddr, sizeof(sc->arpcom.ac_enaddr)); } /* * Set new address */ ze_init(ifp->if_unit); break; } #endif default: ze_init(ifp->if_unit); break; } break; case SIOCSIFFLAGS: /* * 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 NBPFILTER > 0 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 + ZE_P0_RCR, ZE_RCR_PRO|ZE_RCR_AM|ZE_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 + ZE_P0_RCR, ZE_RCR_AB); } #endif #if 0 /* * An unfortunate hack to provide the (required) software control * of the tranceiver for 3Com boards. The LLC0 flag disables * the tranceiver if set. */ if (sc->vendor == ZE_VENDOR_3COM) { if (ifp->if_flags & IFF_LLC0) { outb(sc->asic_addr + ZE_3COM_CR, 0); } else { outb(sc->asic_addr + ZE_3COM_CR, ZE_3COM_CR_XSEL); } } #endif 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. */ 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, *ze_ring_to_mbuf(); u_short off; int resid; u_short etype; struct trailer_header { u_short trail_type; u_short trail_residual; } trailer_header; /* 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); etype = ntohs((u_short)eh->ether_type); /* * Deal with trailer protocol: * If trailer protocol, calculate the datasize as 'off', * which is also the offset to the trailer header. * Set resid to the amount of packet data following the * trailer header. * Finally, copy residual data into mbuf chain. */ if (etype >= ETHERTYPE_TRAIL && etype < ETHERTYPE_TRAIL+ETHERTYPE_NTRAILER) { off = (etype - ETHERTYPE_TRAIL) << 9; if ((off + sizeof(struct trailer_header)) > len) goto bad; /* insanity */ eh->ether_type = *ringoffset(sc, buf, off, u_short *); resid = ntohs(*ringoffset(sc, buf, off+2, u_short *)); if ((off + resid) > len) goto bad; /* insanity */ resid -= sizeof(struct trailer_header); if (resid < 0) goto bad; /* insanity */ m = ze_ring_to_mbuf(sc, ringoffset(sc, buf, off+4, char *), head, resid); if (m == NULL) goto bad; len = off; head->m_pkthdr.len -= 4; /* subtract trailer 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; #if NBPFILTER > 0 /* * Check if there's a BPF listener on this interface. * If so, hand off the raw packet to bpf. */ if (sc->bpf) { bpf_mtap(sc->bpf, 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; } } #endif /* * Fix up data start offset in mbuf to point past ether header */ m_adj(head, sizeof(struct ether_header)); /* * silly ether_input routine needs 'type' in host byte order */ eh->ether_type = ntohs(eh->ether_type); 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 */ 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