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Diffstat (limited to 'bsps/shared/net/i82586.c')
| -rw-r--r-- | bsps/shared/net/i82586.c | 2198 |
1 files changed, 0 insertions, 2198 deletions
diff --git a/bsps/shared/net/i82586.c b/bsps/shared/net/i82586.c deleted file mode 100644 index 8933ddf3c4..0000000000 --- a/bsps/shared/net/i82586.c +++ /dev/null @@ -1,2198 +0,0 @@ -/* $NetBSD: i82586.c,v 1.38 2001/07/07 05:35:39 thorpej Exp $ */ - -/*- - * Copyright (c) 1998 The NetBSD Foundation, Inc. - * All rights reserved. - * - * This code is derived from software contributed to The NetBSD Foundation - * by Paul Kranenburg and Charles M. Hannum. - * - * 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 NetBSD - * Foundation, Inc. and its contributors. - * 4. Neither the name of The NetBSD Foundation nor the names of its - * contributors may be used to endorse or promote products derived - * from this software without specific prior written permission. - * - * THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. 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 FOUNDATION OR CONTRIBUTORS - * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR - * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF - * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS - * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN - * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) - * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE - * POSSIBILITY OF SUCH DAMAGE. - */ - -/*- - * Copyright (c) 1997 Paul Kranenburg. - * Copyright (c) 1992, 1993, University of Vermont and State - * Agricultural College. - * Copyright (c) 1992, 1993, Garrett A. Wollman. - * - * Portions: - * Copyright (c) 1994, 1995, Rafal K. Boni - * Copyright (c) 1990, 1991, William F. Jolitz - * Copyright (c) 1990, The Regents of the University of California - * - * RTEMS: - * Copyright (c) 2001, Chris Johns, Cybertec Pty Ltd, - * http://www.cybertec.com.au/. - * - * 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, and by the University of California, Berkeley, Lawrence - * Berkeley Laboratory, and its 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. - */ - -/* - * Intel 82586 Ethernet chip - * Register, bit, and structure definitions. - * - * Original StarLAN driver written by Garrett Wollman with reference to the - * Clarkson Packet Driver code for this chip written by Russ Nelson and others. - * - * BPF support code taken from hpdev/if_le.c, supplied with tcpdump. - * - * 3C507 support is loosely based on code donated to NetBSD by Rafal Boni. - * - * Majorly cleaned up and 3C507 code merged by Charles Hannum. - * - * Converted to SUN ie driver by Charles D. Cranor, - * October 1994, January 1995. - * This sun version based on i386 version 1.30. - */ - -/* - * The i82586 is a very painful chip, found in sun3's, sun-4/100's - * sun-4/200's, and VME based suns. The byte order is all wrong for a - * SUN, making life difficult. Programming this chip is mostly the same, - * but certain details differ from system to system. This driver is - * written so that different "ie" interfaces can be controled by the same - * driver. - */ - -/* -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 - NRXBUF 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 i82586_intr(), it is immediately possible - to tell what precisely caused it. ANY OTHER command-sending - routines should run at splnet(), and should post an acknowledgement - to every interrupt they generate. - - To save the expense of shipping a command to 82586 every time we - want to send a frame, we use a linked list of commands consisting - of alternate XMIT and NOP commands. The links of these elements - are manipulated (in iexmit()) such that the NOP command loops back - to itself whenever the following XMIT command is not yet ready to - go. Whenever an XMIT is ready, the preceding NOP link is pointed - at it, while its own link field points to the following NOP command. - Thus, a single transmit command sets off an interlocked traversal - of the xmit command chain, with the host processor in control of - the synchronization. -*/ - -#include <machine/rtems-bsd-kernel-space.h> - -#include <rtems.h> -#include <rtems/error.h> -#include <rtems/rtems_bsdnet.h> - -#include <ctype.h> -#include <stdio.h> -#include <string.h> -#include <errno.h> -#include <inttypes.h> - -#include <sys/param.h> -#include <sys/mbuf.h> -#include <sys/socket.h> -#include <sys/sockio.h> - -#include <net/ethernet.h> -#include <net/if.h> -#include <net/if_types.h> -#include <net/if_dl.h> - -#include <netinet/in.h> -#include <netinet/if_ether.h> - -#include "i82586reg.h" -#include <libchip/i82586var.h> - -#if defined(ALIGNBYTES) && defined(ALIGN) -/* FIXME: Redefine because some versions of - * RTEMS newlib and the BSDs ship a broken ALIGN */ -#undef ALIGN -#define ALIGN(p) (((uintptr_t)(p) + ALIGNBYTES) & ~ALIGNBYTES) -#else -#define ALIGN(p) (p) -#endif - -/* - * A global way to change all async cmd requests at once. For RTEMS and running - * as tasks I wanted to see if the tx race condition is effected by this. - */ -#define ASYNC_OPTION (1) - -void i82586_reset (struct ie_softc *, int); -void i82586_watchdog (struct ifnet *); -void i82586_init (void *); -int i82586_ioctl (struct ifnet *, ioctl_command_t cmd, caddr_t data); -void i82586_start (struct ifnet *); - -void i82586_stop (struct ifnet *, int); -int i82586_rint (struct ie_softc *, int); -int i82586_tint (struct ie_softc *, int); - -int i82586_mediachange (struct ifnet *); -void i82586_mediastatus (struct ifnet *, struct ifmediareq *); - -static void i82586_tx_task(void *arg); -static void i82586_start_tx(struct ie_softc *sc); - -static int ie_readframe (struct ie_softc *, int); -static struct mbuf *ieget (struct ie_softc *, int, int); -static int i82586_get_rbd_list (struct ie_softc *, u_int16_t*, - u_int16_t*, int *); -static void i82586_release_rbd_list (struct ie_softc *, - u_int16_t, u_int16_t); -static int i82586_drop_frames (struct ie_softc *); -static int i82586_chk_rx_ring (struct ie_softc *); - -static __inline__ void ie_ack (struct ie_softc *, u_int); -static __inline__ void iexmit (struct ie_softc *); -static void i82586_start_transceiver (struct ie_softc *); - -static void i82586_count_errors (struct ie_softc *); -static void i82586_rx_errors (struct ie_softc *, int, int); -static void i82586_setup_bufs (struct ie_softc *); -static void setup_simple_command (struct ie_softc *, int, int); -static int ie_cfg_setup (struct ie_softc *, int, int, int); -static int ie_ia_setup (struct ie_softc *, int); -static void ie_run_tdr (struct ie_softc *, int); -static int ie_mc_setup (struct ie_softc *, int); -static void ie_mc_reset (struct ie_softc *); -static int i82586_start_cmd (struct ie_softc *, int, int, int, int); -static int i82586_cmd_wait (struct ie_softc *); - -#if I82586_DEBUG -static void print_softie(struct ie_softc *sc); -static void print_rbd (struct ie_softc *, int); -#endif - -#define min(l,r) ((l) < (r) ? (l) : (r)) -#define max(l,r) ((l) > (r) ? (l) : (r)) - -#define delay(p) rtems_task_wake_after (RTEMS_MICROSECONDS_TO_TICKS (p)) - -#define i82586_WAKE_EVENT RTEMS_EVENT_1 -#define i82586_TX_EVENT RTEMS_EVENT_2 - -static char * -bitmask_snprintf(unsigned long value, const char *format, char *buf, int blen) -{ - char *b = buf; - int bit = 31; - - while (bit-- > *format) - value <<= 1; - - format++; - - while (*format) - { - if (value & 0x80000000) - while (isalnum((unsigned char)*format)) - *b++ = *format; - else - *b++ = '0'; - - *b++ = ','; - - while (bit-- > *format) - value <<= 1; - - format++; - } - - *b = '\0'; - return buf; -} - -/* - * Front-ends call this function to attach to the MI driver. - * - * The front-end has responsibility for managing the ICP and ISCP - * structures. Both of these are opaque to us. Also, the front-end - * chooses a location for the SCB which is expected to be addressable - * (through `sc->scb') as an offset against the shared-memory bus handle. - * - * The following MD interface function must be setup by the front-end - * before calling here: - * - * hwreset - board dependent reset - * hwinit - board dependent initialization - * chan_attn - channel attention - * intrhook - board dependent interrupt processing - * memcopyin - shared memory copy: board to KVA - * memcopyout - shared memory copy: KVA to board - * ie_bus_read16 - read a sixteen-bit i82586 pointer - * ie_bus_write16 - write a sixteen-bit i82586 pointer - * ie_bus_write24 - write a twenty-four-bit i82586 pointer - * - */ -int -i82586_attach(struct rtems_bsdnet_ifconfig *config, int attaching) -{ - struct ie_softc *sc; - struct ifnet *ifp; - char *name; - int unit; - int mtu; - - /* - * Parse driver name - */ - - if ((unit = rtems_bsdnet_parse_driver_name (config, &name)) < 0) - return 0; - - sc = config->drv_ctrl; - ifp = &sc->arpcom.ac_if; - -#if I82586_DEBUG - sc->sc_debug = 0; /*IED_TINT | IED_XMIT; */ -#endif - - if (attaching) - { - if (ifp->if_softc) - { - printf ("Driver `%s' already in use.\n", config->name); - return 0; - } - - /* - * Process options - */ - - memcpy (sc->arpcom.ac_enaddr, config->hardware_address, ETHER_ADDR_LEN); - - if (config->mtu) - mtu = config->mtu; - else - mtu = ETHERMTU; - - ifp->if_softc = sc; - ifp->if_unit = unit; - ifp->if_name = name; - ifp->if_mtu = mtu; - ifp->if_init = i82586_init; - ifp->if_ioctl = i82586_ioctl; - ifp->if_start = i82586_start; - ifp->if_output = ether_output; - ifp->if_flags = IFF_BROADCAST | IFF_SIMPLEX | IFF_MULTICAST; - - if (ifp->if_snd.ifq_maxlen == 0) - ifp->if_snd.ifq_maxlen = ifqmaxlen; - - /* Attach the interface. */ - if_attach(ifp); - ether_ifattach(ifp); - return 1; - } - return 0; -} - - -/* - * Interrupt Acknowledge. Mask in native byte-order. - */ -static __inline__ void -ie_ack(struct ie_softc *sc, u_int mask) -{ - u_int status; - - IE_BUS_BARRIER(sc, 0, 0, BUS_SPACE_BARRIER_READ); - status = sc->ie_bus_read16(sc, IE_SCB_STATUS(sc->scb)); - i82586_start_cmd(sc, status & mask, 0, 0, 0); - if (sc->intrhook) - sc->intrhook(sc, INTR_ACK); -} - - -/* - * 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 struct mbuf * -ieget(struct ie_softc *sc, int head, int totlen) -{ - struct mbuf *m, *m0, *newm; - int len, resid; - int thisrboff, thismboff; - struct ether_header eh; - - /* - * Snarf the Ethernet header. - */ - (sc->memcopyin)(sc, &eh, IE_RBUF_ADDR(sc, head), - sizeof(struct ether_header)); - - resid = totlen; - - MGETHDR(m0, M_DONTWAIT, MT_DATA); - if (m0 == 0) - return (0); - m0->m_pkthdr.rcvif = &sc->arpcom.ac_if; - m0->m_pkthdr.len = totlen; - len = MHLEN; - m = m0; - - /* - * This loop goes through and allocates mbufs for all the data we will - * be copying in. It does not actually do the copying yet. - */ - while (totlen > 0) { - if (totlen >= MINCLSIZE) { - MCLGET(m, M_DONTWAIT); - if ((m->m_flags & M_EXT) == 0) - goto bad; - len = MCLBYTES; - } - - if (m == m0) { - caddr_t newdata = (caddr_t) - ALIGN(m->m_data + sizeof(struct ether_header)) - - sizeof(struct ether_header); - len -= newdata - m->m_data; - m->m_data = newdata; - } - - m->m_len = len = min(totlen, len); - - totlen -= len; - if (totlen > 0) { - MGET(newm, M_DONTWAIT, MT_DATA); - if (newm == 0) - goto bad; - len = MLEN; - m = m->m_next = newm; - } - } - - m = m0; - thismboff = 0; - - /* - * Copy the Ethernet header into the mbuf chain. - */ - memcpy(mtod(m, caddr_t), &eh, sizeof(struct ether_header)); - thismboff = sizeof(struct ether_header); - thisrboff = sizeof(struct ether_header); - resid -= sizeof(struct ether_header); - - /* - * 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) { - int thisrblen = IE_RBUF_SIZE - thisrboff, - thismblen = m->m_len - thismboff; - len = min(thisrblen, thismblen); - - (sc->memcopyin)(sc, mtod(m, caddr_t) + thismboff, - IE_RBUF_ADDR(sc,head) + thisrboff, - (u_int)len); - resid -= len; - - if (len == thismblen) { - m = m->m_next; - thismboff = 0; - } else - thismboff += len; - - if (len == thisrblen) { - if (++head == sc->nrxbuf) - head = 0; - thisrboff = 0; - } else - thisrboff += len; - } - - /* - * 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 (m0); - - bad: - m_freem(m0); - return (0); -} - -/* - * Setup all necessary artifacts for an XMIT command, and then pass the XMIT - * command to the chip to be executed. - */ -static __inline__ void -iexmit(struct ie_softc *sc) -{ - int off; - int cur, prev; - - cur = sc->xctail; - -#if I82586_DEBUG - I82586_TRACE(sc, I82586_TX_EMIT, cur); -#endif - -#if I82586_DEBUG - if (sc->sc_debug & IED_XMIT) - printf("%s: xmit buffer %d\n", sc->arpcom.ac_if.if_name, cur); -#endif - - /* - * Setup the transmit command. - */ - sc->ie_bus_write16(sc, IE_CMD_XMIT_DESC(sc->xmit_cmds, cur), - IE_XBD_ADDR(sc->xbds, cur)); - - sc->ie_bus_write16(sc, IE_CMD_XMIT_STATUS(sc->xmit_cmds, cur), 0); - - if (sc->do_xmitnopchain) { - /* - * Gate this XMIT command to the following NOP - */ - sc->ie_bus_write16(sc, IE_CMD_XMIT_LINK(sc->xmit_cmds, cur), - IE_CMD_NOP_ADDR(sc->nop_cmds, cur)); - sc->ie_bus_write16(sc, IE_CMD_XMIT_CMD(sc->xmit_cmds, cur), - IE_CMD_XMIT | IE_CMD_INTR); - - /* - * Loopback at following NOP - */ - sc->ie_bus_write16(sc, IE_CMD_NOP_STATUS(sc->nop_cmds, cur), 0); - sc->ie_bus_write16(sc, IE_CMD_NOP_LINK(sc->nop_cmds, cur), - IE_CMD_NOP_ADDR(sc->nop_cmds, cur)); - - /* - * Gate preceding NOP to this XMIT command - */ - prev = (cur + NTXBUF - 1) % NTXBUF; - sc->ie_bus_write16(sc, IE_CMD_NOP_STATUS(sc->nop_cmds, prev), 0); - sc->ie_bus_write16(sc, IE_CMD_NOP_LINK(sc->nop_cmds, prev), - IE_CMD_XMIT_ADDR(sc->xmit_cmds, cur)); - - off = IE_SCB_STATUS(sc->scb); - IE_BUS_BARRIER(sc, off, 2, BUS_SPACE_BARRIER_READ); - if ((sc->ie_bus_read16(sc, off) & IE_CUS_ACTIVE) == 0) { - printf("iexmit: CU not active\n"); - i82586_start_transceiver(sc); - } - } else { - sc->ie_bus_write16(sc, IE_CMD_XMIT_LINK(sc->xmit_cmds,cur), - 0xffff); - - sc->ie_bus_write16(sc, IE_CMD_XMIT_CMD(sc->xmit_cmds, cur), - IE_CMD_XMIT | IE_CMD_INTR | IE_CMD_LAST); - - off = IE_SCB_CMDLST(sc->scb); - sc->ie_bus_write16(sc, off, IE_CMD_XMIT_ADDR(sc->xmit_cmds, cur)); - IE_BUS_BARRIER(sc, off, 2, BUS_SPACE_BARRIER_READ); - - if (i82586_start_cmd(sc, IE_CUC_START, 0, 0, ASYNC_OPTION)) - printf("%s: iexmit: start xmit command timed out\n", - sc->arpcom.ac_if.if_name); - } - - sc->arpcom.ac_if.if_timer = 5; -} - - -/* - * Device timeout/watchdog routine. - * Entered if the device neglects to generate an interrupt after a - * transmit has been started on it. - */ -void -i82586_watchdog(struct ifnet *ifp) -{ - struct ie_softc *sc = ifp->if_softc; - printf("%s: device timeout\n", ifp->if_name); - ++ifp->if_oerrors; - i82586_reset(sc, 1); -} - -static int -i82586_cmd_wait(struct ie_softc *sc) -{ - /* spin on i82586 command acknowledge; wait at most 0.9 (!) seconds */ - int i, off; - u_int16_t cmd; - - for (i = 0; i < 900000; i++) { - /* Read the command word */ - off = IE_SCB_CMD(sc->scb); - - IE_BUS_BARRIER(sc, off, 2, BUS_SPACE_BARRIER_READ); - if ((cmd = sc->ie_bus_read16(sc, off)) == 0) - return (0); - delay(1); - } - - off = IE_SCB_STATUS(sc->scb); - printf("i82586_cmd_wait: timo(%ssync): scb status: 0x%x, cmd: 0x%x\n", - sc->async_cmd_inprogress?"a":"", - sc->ie_bus_read16(sc, off), cmd); - - return (1); /* Timeout */ -} - -/* - * 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 one of the MASK bits to turn on in the command's - * status field. - * If ASYNC is set, we just call the chip's attention and return. - * We may have to wait for the command's acceptance later though. - */ -static int -i82586_start_cmd(struct ie_softc *sc, int cmd, int iecmdbuf, int mask, int async) -{ - int i; - int off; - - if (sc->async_cmd_inprogress != 0) { - /* - * If previous command was issued asynchronously, wait - * for it now. - */ - if (i82586_cmd_wait(sc) != 0) - return (1); - sc->async_cmd_inprogress = 0; - } - - off = IE_SCB_CMD(sc->scb); - sc->ie_bus_write16(sc, off, cmd); - IE_BUS_BARRIER(sc, off, 2, BUS_SPACE_BARRIER_WRITE); - (sc->chan_attn)(sc, CARD_RESET); - - if (async != 0) { - sc->async_cmd_inprogress = 1; - return (0); - } - - if (IE_ACTION_COMMAND(cmd) && iecmdbuf) { - int status; - /* - * Now spin-lock waiting for status. This is not a very nice - * thing to do, and can kill performance pretty well... - * According to the packet driver, the minimum timeout - * should be .369 seconds. - */ - for (i = 0; i < 369000; i++) { - /* Read the command status */ - off = IE_CMD_COMMON_STATUS(iecmdbuf); - IE_BUS_BARRIER(sc, off, 2, BUS_SPACE_BARRIER_READ); - status = sc->ie_bus_read16(sc, off); - if (status & mask) - return (0); - delay(1); - } - - } else { - /* - * Otherwise, just wait for the command to be accepted. - */ - return (i82586_cmd_wait(sc)); - } - - /* Timeout */ - return (1); -} - - -/* - * Transfer accumulated chip error counters to IF. - */ -static __inline void -i82586_count_errors(struct ie_softc *sc) -{ - int scb = sc->scb; - - sc->arpcom.ac_if.if_ierrors += - sc->ie_bus_read16(sc, IE_SCB_ERRCRC(scb)) + - sc->ie_bus_read16(sc, IE_SCB_ERRALN(scb)) + - sc->ie_bus_read16(sc, IE_SCB_ERRRES(scb)) + - sc->ie_bus_read16(sc, IE_SCB_ERROVR(scb)); - - /* Clear error counters */ - sc->ie_bus_write16(sc, IE_SCB_ERRCRC(scb), 0); - sc->ie_bus_write16(sc, IE_SCB_ERRALN(scb), 0); - sc->ie_bus_write16(sc, IE_SCB_ERRRES(scb), 0); - sc->ie_bus_write16(sc, IE_SCB_ERROVR(scb), 0); -} - - -static void -i82586_rx_errors(struct ie_softc *sc, int fn, int status) -{ - char bits[128]; - - printf("%s: rx error (frame# %d): %s\n", sc->arpcom.ac_if.if_name, fn, - bitmask_snprintf(status, IE_FD_STATUSBITS, bits, sizeof(bits))); -} - -/* - * i82586 interrupt entry point. - */ -rtems_isr -i82586_intr(rtems_vector_number vec, void *arg) -{ - struct ie_softc *sc = arg; - -#if I82586_DEBUG - static unsigned long icnt = 0; - I82586_TRACE(sc, I82586_INTS_REQ, icnt++); -#endif - - /* - * Implementation dependent interrupt handling. It must at least - * disabled interrupts from the i82586. It is hoped this can - * happen somewhere outside the i82586. - */ - if (sc->intrhook) - (sc->intrhook)(sc, INTR_ENTER); - - /* - * Wake the task to handle the interrupt. It will - * enabled the interrupts when it has finished. - */ - rtems_bsdnet_event_send (sc->intr_task, i82586_WAKE_EVENT); -} - -/* - * i82586 interrupt task. The task is actually an extension of the interrupt - * with a context switch in the middle. The RTEMS TCP/IP stack requires a task - * be used to talk to the stack as a network semaphore is claimed. This - * cannot happen during an interrupt. - */ -static void -i82586_intr_task(void *arg) -{ - struct ie_softc *sc = arg; - rtems_event_set events; - u_int status; - int off; - int reset; - - /* - * Not sure this is a good idea but as a out path exists and - * roads lead to it, it seems ok. - */ - for (;;) { - rtems_bsdnet_event_receive (i82586_WAKE_EVENT, - RTEMS_WAIT | RTEMS_EVENT_ANY, - 0, &events); - - off = IE_SCB_STATUS(sc->scb); - IE_BUS_BARRIER(sc, off, 2, BUS_SPACE_BARRIER_READ); - status = sc->ie_bus_read16(sc, off) & IE_ST_WHENCE; - -#if I82586_DEBUG - I82586_TRACE(sc, I82586_INTS_IN, status); -#endif - - reset = 0; - - while ((status & IE_ST_WHENCE) != 0) { -#if I82586_DEBUG - if (sc->sc_debug) - printf ("%s: -------\n%s: scbstatus=0x%x\n", - sc->arpcom.ac_if.if_name, sc->arpcom.ac_if.if_name, status); -#endif - -#if 1 - /* Ack interrupts FIRST in case we receive more during the ISR. */ - ie_ack(sc, status & IE_ST_WHENCE); -#endif - - i82586_start_cmd(sc, status & IE_ST_WHENCE, 0, 0, ASYNC_OPTION); - - if (status & (IE_ST_FR | IE_ST_RNR)) - if (i82586_rint(sc, status) != 0) { - reset = 1; - break; - } - - if (status & IE_ST_CX) - if (i82586_tint(sc, status) != 0) { - reset = 1; - break; - } - -#if I82586_DEBUG - if ((status & IE_ST_CNA) && (sc->sc_debug & IED_CNA)) - printf("%s: cna; status=0x%x\n", sc->arpcom.ac_if.if_name, status); -#endif - -#if 0 - if (sc->intrhook) - (sc->intrhook)(sc, INTR_LOOP); -#endif - -#if 1 - /* - * Interrupt ACK was posted asynchronously; wait for - * completion here before reading SCB status again. - * - * If ACK fails, try to reset the chip, in hopes that - * it helps. - */ - if (i82586_cmd_wait(sc) != 0) { - reset = 1; - break; - } -#endif - - IE_BUS_BARRIER(sc, off, 2, BUS_SPACE_BARRIER_READ); - status = sc->ie_bus_read16(sc, off); -#if I82586_DEBUG - I82586_TRACE(sc, I82586_INTS_LOOPS, status); -#endif - } - - if (reset) { -#if I82586_DEBUG - printf("%s: intr reset; status=0x%x\n", sc->arpcom.ac_if.if_name, status); -#endif - i82586_cmd_wait(sc); - i82586_reset(sc, 1); - } - -#if I82586_DEBUG - I82586_TRACE(sc, I82586_INTS_OUT, status); -#endif - - if (sc->intrhook) - (sc->intrhook)(sc, INTR_EXIT); - } -} - -/* - * Process a received-frame interrupt. - */ -int -i82586_rint(struct ie_softc *sc, int scbstatus) -{ - static int timesthru = 1024; - int i, status, off; - -#if I82586_DEBUG - I82586_TRACE(sc, I82586_RX_INT, scbstatus); - - if (sc->sc_debug & IED_RINT) - printf("%s: rint: status 0x%x\n", - sc->arpcom.ac_if.if_name, scbstatus); -#endif - - for (;;) { - int drop = 0; - - i = sc->rfhead; - off = IE_RFRAME_STATUS(sc->rframes, i); - IE_BUS_BARRIER(sc, off, 2, BUS_SPACE_BARRIER_READ); - status = sc->ie_bus_read16(sc, off); - -#if I82586_DEBUG - if (sc->sc_debug & IED_RINT) - printf("%s: rint: frame(%d) status 0x%x\n", - sc->arpcom.ac_if.if_name, i, status); -#endif - if ((status & IE_FD_COMPLETE) == 0) { - if ((status & IE_FD_OK) != 0) { - printf("%s: rint: weird: ", - sc->arpcom.ac_if.if_name); - i82586_rx_errors(sc, i, status); -#if I82586_DEBUG - I82586_TRACE(sc, I82586_RX_ERR, status); -#endif - break; - } - if (--timesthru == 0) { - /* Account the accumulated errors */ - i82586_count_errors(sc); - timesthru = 1024; - } - break; - } else if ((status & IE_FD_OK) == 0) { - /* - * If the chip is configured to automatically - * discard bad frames, the only reason we can - * get here is an "out-of-resource" condition. - */ - i82586_rx_errors(sc, i, status); - drop = 1; - -#if I82586_DEBUG - I82586_TRACE(sc, I82586_RX_DROP, status); -#endif - } - -#if I82586_DEBUG - if ((status & IE_FD_BUSY) != 0) - printf("%s: rint: frame(%d) busy; status=0x%x\n", - sc->arpcom.ac_if.if_name, i, status); -#endif - - /* - * Advance the RFD list, since we're done with - * this descriptor. - */ - - /* Clear frame status */ - sc->ie_bus_write16(sc, off, 0); - - /* Put fence at this frame (the head) */ - off = IE_RFRAME_LAST(sc->rframes, i); - sc->ie_bus_write16(sc, off, IE_FD_EOL|IE_FD_SUSP); - - /* and clear RBD field */ - off = IE_RFRAME_BUFDESC(sc->rframes, i); - sc->ie_bus_write16(sc, off, 0xffff); - - /* Remove fence from current tail */ - off = IE_RFRAME_LAST(sc->rframes, sc->rftail); - sc->ie_bus_write16(sc, off, 0); - - if (++sc->rftail == sc->nframes) - sc->rftail = 0; - if (++sc->rfhead == sc->nframes) - sc->rfhead = 0; - - /* Pull the frame off the board */ - if (drop) { - i82586_drop_frames(sc); - if ((status & IE_FD_RNR) != 0) - sc->rnr_expect = 1; - sc->arpcom.ac_if.if_ierrors++; - } else if (ie_readframe(sc, i) != 0) - return (1); - } - - if ((scbstatus & IE_ST_RNR) != 0) { - - /* - * Receiver went "Not Ready". We try to figure out - * whether this was an expected event based on past - * frame status values. - */ - - if ((scbstatus & IE_RUS_SUSPEND) != 0) { - /* - * We use the "suspend on last frame" flag. - * Send a RU RESUME command in response, since - * we should have dealt with all completed frames - * by now. - */ - printf("RINT: SUSPENDED; scbstatus=0x%x\n", - scbstatus); - if (i82586_start_cmd(sc, IE_RUC_RESUME, 0, 0, 0) == 0) - return (0); - printf("%s: RU RESUME command timed out\n", - sc->arpcom.ac_if.if_name); - return (1); /* Ask for a reset */ - } - - if (sc->rnr_expect != 0) { - /* - * The RNR condition was announced in the previously - * completed frame. Assume the receive ring is Ok, - * so restart the receiver without further delay. - */ - i82586_start_transceiver(sc); - sc->rnr_expect = 0; - return (0); - - } else if ((scbstatus & IE_RUS_NOSPACE) != 0) { - /* - * We saw no previous IF_FD_RNR flag. - * We check our ring invariants and, if ok, - * just restart the receiver at the current - * point in the ring. - */ - if (i82586_chk_rx_ring(sc) != 0) - return (1); - - i82586_start_transceiver(sc); - sc->arpcom.ac_if.if_ierrors++; - return (0); - } else - printf("%s: receiver not ready; scbstatus=0x%x\n", - sc->arpcom.ac_if.if_name, scbstatus); - - sc->arpcom.ac_if.if_ierrors++; - return (1); /* Ask for a reset */ - } - - 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 i82586_start(). - */ -int -i82586_tint(struct ie_softc *sc, int scbstatus) -{ - struct ifnet *ifp = &sc->arpcom.ac_if; - int status; - -#if I82586_DEBUG - I82586_TRACE(sc, I82586_TX_INT, sc->xmit_busy); -#endif - -#if I82586_DEBUG - if (sc->xmit_busy <= 0) { - printf("i82586_tint: (%d), WEIRD: xmit_busy=%d, xctail=%d, xchead=%d\n", - sc->trace_flow_in / 2, sc->xmit_busy, sc->xctail, sc->xchead); - I82586_TRACE(sc, I82586_TX_BAD, sc->xctail); - return (0); - } -#endif - - ifp->if_timer = 0; - ifp->if_flags &= ~IFF_OACTIVE; - - status = sc->ie_bus_read16(sc, IE_CMD_XMIT_STATUS(sc->xmit_cmds, - sc->xctail)); - -#if I82586_DEBUG - if (sc->sc_debug & IED_TINT) - printf("%s: tint: SCB status 0x%x; xmit status 0x%x\n", - sc->arpcom.ac_if.if_name, scbstatus, status); -#endif - - if ((status & IE_STAT_COMPL) == 0 || (status & IE_STAT_BUSY)) { - printf("i82586_tint: (%d) command still busy; status=0x%x; tail=%d\n", - sc->trace_flow_in / 2, status, sc->xctail); - printf("iestatus = 0x%x\n", scbstatus); -/* sc->sc_debug = IED_ALL; */ - } - - if (status & IE_STAT_OK) { - ifp->if_opackets++; - ifp->if_collisions += (status & IE_XS_MAXCOLL); - } else { - ifp->if_oerrors++; - /* - * Check SQE and DEFERRED? - * What if more than one bit is set? - */ - if (status & IE_STAT_ABORT) - printf("%s: send aborted\n", sc->arpcom.ac_if.if_name); - else if (status & IE_XS_NOCARRIER) - printf("%s: no carrier\n", sc->arpcom.ac_if.if_name); - else if (status & IE_XS_LOSTCTS) - printf("%s: lost CTS\n", sc->arpcom.ac_if.if_name); - else if (status & IE_XS_UNDERRUN) - printf("%s: DMA underrun\n", sc->arpcom.ac_if.if_name); - else if (status & IE_XS_EXCMAX) { - printf("%s: too many collisions\n", - sc->arpcom.ac_if.if_name); - sc->arpcom.ac_if.if_collisions += 16; - } - } - - /* - * If multicast addresses were added or deleted while transmitting, - * ie_mc_reset() set the want_mcsetup flag indicating that we - * should do it. - */ - if (sc->want_mcsetup) { - ie_mc_setup(sc, IE_XBUF_ADDR(sc, sc->xctail)); - sc->want_mcsetup = 0; - } - - /* Done with the buffer. */ - sc->xmit_busy--; - sc->xctail = (sc->xctail + 1) % NTXBUF; - - /* Start the next packet, if any, transmitting. */ - if (sc->xmit_busy > 0) - iexmit(sc); - - i82586_start_tx(sc); - return (0); -} - -/* - * Get a range of receive buffer descriptors that represent one packet. - */ -static int -i82586_get_rbd_list(struct ie_softc *sc, u_int16_t *start, u_int16_t *end, int *pktlen) -{ - int off, rbbase = sc->rbds; - int rbindex, count = 0; - int plen = 0; - int rbdstatus; - - *start = rbindex = sc->rbhead; - - do { - off = IE_RBD_STATUS(rbbase, rbindex); - IE_BUS_BARRIER(sc, off, 2, BUS_SPACE_BARRIER_READ); - rbdstatus = sc->ie_bus_read16(sc, off); - if ((rbdstatus & IE_RBD_USED) == 0) { - /* - * This means we are somehow out of sync. So, we - * reset the adapter. - */ -#if I82586_DEBUG - print_rbd(sc, rbindex); -#endif - printf("%s: receive descriptors out of sync at %d\n", - sc->arpcom.ac_if.if_name, rbindex); - return (0); - } - plen += (rbdstatus & IE_RBD_CNTMASK); - - if (++rbindex == sc->nrxbuf) - rbindex = 0; - - ++count; - } while ((rbdstatus & IE_RBD_LAST) == 0); - *end = rbindex; - *pktlen = plen; - return (count); -} - - -/* - * Release a range of receive buffer descriptors after we've copied the packet. - */ -static void -i82586_release_rbd_list(struct ie_softc *sc, u_int16_t start, u_int16_t end) -{ - int off, rbbase = sc->rbds; - int rbindex = start; - - do { - /* Clear buffer status */ - off = IE_RBD_STATUS(rbbase, rbindex); - sc->ie_bus_write16(sc, off, 0); - if (++rbindex == sc->nrxbuf) - rbindex = 0; - } while (rbindex != end); - - /* Mark EOL at new tail */ - rbindex = ((rbindex == 0) ? sc->nrxbuf : rbindex) - 1; - off = IE_RBD_BUFLEN(rbbase, rbindex); - sc->ie_bus_write16(sc, off, IE_RBUF_SIZE|IE_RBD_EOL); - - /* Remove EOL from current tail */ - off = IE_RBD_BUFLEN(rbbase, sc->rbtail); - sc->ie_bus_write16(sc, off, IE_RBUF_SIZE); - - /* New head & tail pointer */ -/* hmm, why have both? head is always (tail + 1) % NRXBUF */ - sc->rbhead = end; - sc->rbtail = rbindex; -} - -/* - * Drop the packet at the head of the RX buffer ring. - * Called if the frame descriptor reports an error on this packet. - * Returns 1 if the buffer descriptor ring appears to be corrupt; - * and 0 otherwise. - */ -static int -i82586_drop_frames(struct ie_softc *sc) -{ - u_int16_t bstart, bend; - int pktlen; - - if (i82586_get_rbd_list(sc, &bstart, &bend, &pktlen) == 0) - return (1); - i82586_release_rbd_list(sc, bstart, bend); - return (0); -} - -/* - * Check the RX frame & buffer descriptor lists for our invariants, - * i.e.: EOL bit set iff. it is pointed at by the r*tail pointer. - * - * Called when the receive unit has stopped unexpectedly. - * Returns 1 if an inconsistency is detected; 0 otherwise. - * - * The Receive Unit is expected to be NOT RUNNING. - */ -static int -i82586_chk_rx_ring(struct ie_softc *sc) -{ - int n, off, val; - - for (n = 0; n < sc->nrxbuf; n++) { - off = IE_RBD_BUFLEN(sc->rbds, n); - val = sc->ie_bus_read16(sc, off); - if ((n == sc->rbtail) ^ ((val & IE_RBD_EOL) != 0)) { - /* `rbtail' and EOL flag out of sync */ - printf("%s: rx buffer descriptors out of sync at %d\n", - sc->arpcom.ac_if.if_name, n); - return (1); - } - - /* Take the opportunity to clear the status fields here ? */ - } - - for (n = 0; n < sc->nframes; n++) { - off = IE_RFRAME_LAST(sc->rframes, n); - val = sc->ie_bus_read16(sc, off); - if ((n == sc->rftail) ^ ((val & (IE_FD_EOL|IE_FD_SUSP)) != 0)) { - /* `rftail' and EOL flag out of sync */ - printf("%s: rx frame list out of sync at %d\n", - sc->arpcom.ac_if.if_name, n); - return (1); - } - } - - 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 list 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 int -ie_readframe(struct ie_softc *sc, int num) /* frame number to read */ -{ - struct ether_header *eh; - struct mbuf *m; - u_int16_t bstart, bend; - int pktlen; - - if (i82586_get_rbd_list(sc, &bstart, &bend, &pktlen) == 0) { - sc->arpcom.ac_if.if_ierrors++; - return (1); - } - - m = ieget(sc, bstart, pktlen); - i82586_release_rbd_list(sc, bstart, bend); - - if (m == 0) { - sc->arpcom.ac_if.if_ierrors++; - return (0); - } - - /* - * Remove the mac header. This is different from the NetBSD - * stack. - */ - eh = mtod(m, struct ether_header *); - m->m_data += sizeof (struct ether_header); - m->m_len -= sizeof (struct ether_header); - m->m_pkthdr.len -= sizeof (struct ether_header); - -#if I82586_DEBUG - if (sc->sc_debug & IED_READFRAME) { - - printf("%s: frame from ether %s type 0x%x len %d\n", - sc->arpcom.ac_if.if_name, - ether_sprintf(eh->ether_shost), - (u_int)ntohs(eh->ether_type), - pktlen); - } -#endif - -#if NBPFILTER > 0 - /* Check for a BPF filter; if so, hand it up. */ - if (sc->arpcom.ac_if.if_bpf != 0) - /* Pass it up. */ - bpf_mtap(sc->arpcom.ac_if.if_bpf, m); -#endif /* NBPFILTER > 0 */ - - /* - * Finally pass this packet up to higher layers. - */ - ether_input (&sc->arpcom.ac_if, eh, m); - sc->arpcom.ac_if.if_ipackets++; - -#if I82586_DEBUG - I82586_TRACE(sc, I82586_RX_OK, sc->arpcom.ac_if.if_ipackets); -#endif - - return (0); -} - -/* - * Start transmission on an interface. - */ -void -i82586_start(struct ifnet *ifp) -{ - struct ie_softc *sc = ifp->if_softc; - - if ((ifp->if_flags & (IFF_RUNNING | IFF_OACTIVE)) != IFF_RUNNING) - return; - -#if I82586_DEBUG - I82586_TRACE(sc, I82586_TX_REQ, sc->xmit_busy); -#endif - - rtems_bsdnet_event_send (sc->tx_task, i82586_TX_EVENT); -} - -static void -i82586_tx_task(void *arg) -{ - struct ie_softc *sc = arg; - rtems_event_set events; - - for (;;) { - rtems_bsdnet_event_receive (i82586_TX_EVENT, - RTEMS_WAIT | RTEMS_EVENT_ANY, - 0, &events); - -#if I82586_DEBUG - I82586_TRACE(sc, I82586_TX_EVT, sc->xmit_busy); - - if (sc->sc_debug) - printf ("%s: =======\n", sc->arpcom.ac_if.if_name); -#endif - - i82586_start_tx(sc); - } -} - -static void -i82586_start_tx(struct ie_softc *sc) -{ - struct ifnet *ifp = &sc->arpcom.ac_if; - struct mbuf *m0, *m; - int buffer, head, xbase; - u_short len; - int s; - -#if I82586_DEBUG - I82586_TRACE(sc, I82586_START_TX, sc->xmit_busy); -#endif - - if ((ifp->if_flags & (IFF_RUNNING | IFF_OACTIVE)) != IFF_RUNNING) - { -#if I82586_DEBUG - I82586_TRACE(sc, I82586_TX_ACTIVE, ifp->if_snd.ifq_len); -#endif - return; - } - - for (;;) { - if (sc->xmit_busy == NTXBUF) { - ifp->if_flags |= IFF_OACTIVE; - break; - } - - head = sc->xchead; - xbase = sc->xbds; - - IF_DEQUEUE(&ifp->if_snd, m0); - if (m0 == 0) - break; - - /* We need to use m->m_pkthdr.len, so require the header */ - if ((m0->m_flags & M_PKTHDR) == 0) - panic("i82586_start: no header mbuf"); - -#if NBPFILTER > 0 - /* Tap off here if there is a BPF listener. */ - if (ifp->if_bpf) - bpf_mtap(ifp->if_bpf, m0); -#endif - -#if I82586_DEBUG - if (sc->sc_debug & IED_ENQ) - printf("%s: fill buffer %d\n", sc->arpcom.ac_if.if_name, - sc->xchead); -#endif - - if (m0->m_pkthdr.len > IE_TBUF_SIZE) - printf("%s: tbuf overflow\n", sc->arpcom.ac_if.if_name); - - buffer = IE_XBUF_ADDR(sc, head); - for (m = m0; m != 0; m = m->m_next) { - (sc->memcopyout)(sc, mtod(m,caddr_t), buffer, m->m_len); - buffer += m->m_len; - } - - len = max(m0->m_pkthdr.len, ETHER_MIN_LEN); - m_freem(m0); - - /* - * Setup the transmit buffer descriptor here, while we - * know the packet's length. - */ - sc->ie_bus_write16(sc, IE_XBD_FLAGS(xbase, head), - len | IE_TBD_EOL); - sc->ie_bus_write16(sc, IE_XBD_NEXT(xbase, head), 0xffff); - sc->ie_bus_write24(sc, IE_XBD_BUF(xbase, head), - IE_XBUF_ADDR(sc, head)); - - if (++head == NTXBUF) - head = 0; - sc->xchead = head; - -#if I82586_DEBUG - I82586_TRACE(sc, I82586_TX_START, sc->xmit_busy); -#endif - - s = splnet(); - /* Start the first packet transmitting. */ - if (sc->xmit_busy == 0) - iexmit(sc); - - sc->xmit_busy++; - - splx(s); - } -} - -/* - * Probe IE's ram setup [ Move all this into MD front-end!? ] - * Use only if SCP and ISCP represent offsets into shared ram space. - */ -int -i82586_proberam(struct ie_softc *sc) -{ - int result, off; - - /* Put in 16-bit mode */ - off = IE_SCP_BUS_USE(sc->scp); - sc->ie_bus_write16(sc, off, 0); - IE_BUS_BARRIER(sc, off, 2, BUS_SPACE_BARRIER_WRITE); - - /* Set the ISCP `busy' bit */ - off = IE_ISCP_BUSY(sc->iscp); - sc->ie_bus_write16(sc, off, 1); - IE_BUS_BARRIER(sc, off, 2, BUS_SPACE_BARRIER_WRITE); - - if (sc->hwreset) - (sc->hwreset)(sc, CHIP_PROBE); - - (sc->chan_attn) (sc, CHIP_PROBE); - - delay(100); /* wait a while... */ - - /* Read back the ISCP `busy' bit; it should be clear by now */ - off = IE_ISCP_BUSY(sc->iscp); - IE_BUS_BARRIER(sc, off, 2, BUS_SPACE_BARRIER_READ); - result = sc->ie_bus_read16(sc, off) == 0; - - /* Acknowledge any interrupts we may have caused. */ - ie_ack(sc, IE_ST_WHENCE); - - return (result); -} - -void -i82586_reset(struct ie_softc *sc, int hard) -{ - int s = splnet(); - - if (hard) - printf("%s: reset\n", sc->arpcom.ac_if.if_name); - - /* Clear OACTIVE in case we're called from watchdog (frozen xmit). */ - sc->arpcom.ac_if.if_timer = 0; - sc->arpcom.ac_if.if_flags &= ~IFF_OACTIVE; - - /* - * Stop i82586 dead in its tracks. - */ - if (i82586_start_cmd(sc, IE_RUC_ABORT | IE_CUC_ABORT, 0, 0, 0)) - printf("%s: abort commands timed out\n", sc->arpcom.ac_if.if_name); - - /* - * This can really slow down the i82586_reset() on some cards, but it's - * necessary to unwedge other ones (eg, the Sun VME ones) from certain - * lockups. - */ - if (hard && sc->hwreset) - (sc->hwreset)(sc, CARD_RESET); - - delay(100); - ie_ack(sc, IE_ST_WHENCE); - - if ((sc->arpcom.ac_if.if_flags & IFF_UP) != 0) { - i82586_init(&sc->arpcom.ac_if); - } - - splx(s); -} - -static void -setup_simple_command(struct ie_softc *sc, int cmd, int cmdbuf) -{ - /* Setup a simple command */ - sc->ie_bus_write16(sc, IE_CMD_COMMON_STATUS(cmdbuf), 0); - sc->ie_bus_write16(sc, IE_CMD_COMMON_CMD(cmdbuf), cmd | IE_CMD_LAST); - sc->ie_bus_write16(sc, IE_CMD_COMMON_LINK(cmdbuf), 0xffff); - - /* Assign the command buffer to the SCB command list */ - sc->ie_bus_write16(sc, IE_SCB_CMDLST(sc->scb), cmdbuf); -} - -/* - * Run the time-domain reflectometer. - */ -static void -ie_run_tdr(struct ie_softc *sc, int cmd) -{ - uint32_t result; - - setup_simple_command(sc, IE_CMD_TDR, cmd); - sc->ie_bus_write16(sc, IE_CMD_TDR_TIME(cmd), 0); - - if (i82586_start_cmd(sc, IE_CUC_START, cmd, IE_STAT_COMPL, 0) || - (sc->ie_bus_read16(sc, IE_CMD_COMMON_STATUS(cmd)) & IE_STAT_OK) == 0) - result = 0x10000; /* XXX */ - else - result = sc->ie_bus_read16(sc, IE_CMD_TDR_TIME(cmd)); - - /* Squash any pending interrupts */ - ie_ack(sc, IE_ST_WHENCE); - - if (result & IE_TDR_SUCCESS) - return; - - if (result & 0x10000) - printf("%s: TDR command failed\n", sc->arpcom.ac_if.if_name); - else if (result & IE_TDR_XCVR) - printf("%s: transceiver problem\n", sc->arpcom.ac_if.if_name); - else if (result & IE_TDR_OPEN) - printf("%s: TDR detected incorrect termination %" PRId32 " clocks away\n", - sc->arpcom.ac_if.if_name, result & IE_TDR_TIME); - else if (result & IE_TDR_SHORT) - printf("%s: TDR detected a short circuit %" PRId32 " clocks away\n", - sc->arpcom.ac_if.if_name, result & IE_TDR_TIME); - else - printf("%s: TDR returned unknown status 0x%" PRIx32 "\n", - sc->arpcom.ac_if.if_name, result); -} - - -/* - * i82586_setup_bufs: set up the buffers - * - * We have a block of KVA at sc->buf_area which is of size sc->buf_area_sz. - * this is to be used for the buffers. The chip indexs its control data - * structures with 16 bit offsets, and it indexes actual buffers with - * 24 bit addresses. So we should allocate control buffers first so that - * we don't overflow the 16 bit offset field. The number of transmit - * buffers is fixed at compile time. - * - */ -static void -i82586_setup_bufs(struct ie_softc *sc) -{ - int ptr = sc->buf_area; /* memory pool */ - int n, r; - - /* - * step 0: zero memory and figure out how many recv buffers and - * frames we can have. - */ - ptr = (ptr + 3) & ~3; /* set alignment and stick with it */ - - - /* - * step 1: lay out data structures in the shared-memory area - */ - - /* The no-op commands; used if "nop-chaining" is in effect */ - sc->nop_cmds = ptr; - ptr += NTXBUF * IE_CMD_NOP_SZ; - - /* The transmit commands */ - sc->xmit_cmds = ptr; - ptr += NTXBUF * IE_CMD_XMIT_SZ; - - /* The transmit buffers descriptors */ - sc->xbds = ptr; - ptr += NTXBUF * IE_XBD_SZ; - - /* The transmit buffers */ - sc->xbufs = ptr; - ptr += NTXBUF * IE_TBUF_SIZE; - - ptr = (ptr + 3) & ~3; /* re-align.. just in case */ - - /* Compute free space for RECV stuff */ - n = sc->buf_area_sz - (ptr - sc->buf_area); - - /* Compute size of one RECV frame */ - r = IE_RFRAME_SZ + ((IE_RBD_SZ + IE_RBUF_SIZE) * B_PER_F); - - sc->nframes = n / r; - - if (sc->nframes <= 0) - panic("ie: bogus buffer calc\n"); - - sc->nrxbuf = sc->nframes * B_PER_F; - - /* The receice frame descriptors */ - sc->rframes = ptr; - ptr += sc->nframes * IE_RFRAME_SZ; - - /* The receive buffer descriptors */ - sc->rbds = ptr; - ptr += sc->nrxbuf * IE_RBD_SZ; - - /* The receive buffers */ - sc->rbufs = ptr; - ptr += sc->nrxbuf * IE_RBUF_SIZE; - -#if I82586_DEBUG - printf("%s: %d frames %d bufs\n", sc->arpcom.ac_if.if_name, sc->nframes, - sc->nrxbuf); -#endif - - /* - * step 2: link together the recv frames and set EOL on last one - */ - for (n = 0; n < sc->nframes; n++) { - int m = (n == sc->nframes - 1) ? 0 : n + 1; - - /* Clear status */ - sc->ie_bus_write16(sc, IE_RFRAME_STATUS(sc->rframes,n), 0); - - /* RBD link = NULL */ - sc->ie_bus_write16(sc, IE_RFRAME_BUFDESC(sc->rframes,n), - 0xffff); - - /* Make a circular list */ - sc->ie_bus_write16(sc, IE_RFRAME_NEXT(sc->rframes,n), - IE_RFRAME_ADDR(sc->rframes,m)); - - /* Mark last as EOL */ - sc->ie_bus_write16(sc, IE_RFRAME_LAST(sc->rframes,n), - ((m==0)? (IE_FD_EOL|IE_FD_SUSP) : 0)); - } - - /* - * step 3: link the RBDs and set EOL on last one - */ - for (n = 0; n < sc->nrxbuf; n++) { - int m = (n == sc->nrxbuf - 1) ? 0 : n + 1; - - /* Clear status */ - sc->ie_bus_write16(sc, IE_RBD_STATUS(sc->rbds,n), 0); - - /* Make a circular list */ - sc->ie_bus_write16(sc, IE_RBD_NEXT(sc->rbds,n), - IE_RBD_ADDR(sc->rbds,m)); - - /* Link to data buffers */ - sc->ie_bus_write24(sc, IE_RBD_BUFADDR(sc->rbds, n), - IE_RBUF_ADDR(sc, n)); - sc->ie_bus_write16(sc, IE_RBD_BUFLEN(sc->rbds,n), - IE_RBUF_SIZE | ((m==0)?IE_RBD_EOL:0)); - } - - /* - * step 4: all xmit no-op commands loopback onto themselves - */ - for (n = 0; n < NTXBUF; n++) { - sc->ie_bus_write16(sc, IE_CMD_NOP_STATUS(sc->nop_cmds, n), 0); - - sc->ie_bus_write16(sc, IE_CMD_NOP_CMD(sc->nop_cmds, n), - IE_CMD_NOP); - - sc->ie_bus_write16(sc, IE_CMD_NOP_LINK(sc->nop_cmds, n), - IE_CMD_NOP_ADDR(sc->nop_cmds, n)); - } - - - /* - * step 6: set the head and tail pointers on receive to keep track of - * the order in which RFDs and RBDs are used. - */ - - /* Pointers to last packet sent and next available transmit buffer. */ - sc->xchead = sc->xctail = 0; - - /* Clear transmit-busy flag and set number of free transmit buffers. */ - sc->xmit_busy = 0; - - /* - * Pointers to first and last receive frame. - * The RFD pointed to by rftail is the only one that has EOL set. - */ - sc->rfhead = 0; - sc->rftail = sc->nframes - 1; - - /* - * Pointers to first and last receive descriptor buffer. - * The RBD pointed to by rbtail is the only one that has EOL set. - */ - sc->rbhead = 0; - sc->rbtail = sc->nrxbuf - 1; - -/* link in recv frames * and buffer into the scb. */ -#if I82586_DEBUG - printf("%s: reserved %d bytes\n", - sc->arpcom.ac_if.if_name, ptr - sc->buf_area); -#endif -} - -static int -ie_cfg_setup(struct ie_softc *sc, int cmd, int promiscuous, int manchester) -{ - int cmdresult, status; - u_int8_t buf[IE_CMD_CFG_SZ]; /* XXX malloc? */ - - *IE_CMD_CFG_CNT(buf) = 0x0c; - *IE_CMD_CFG_FIFO(buf) = 8; - *IE_CMD_CFG_SAVEBAD(buf) = 0x40; - *IE_CMD_CFG_ADDRLEN(buf) = 0x2e; - *IE_CMD_CFG_PRIORITY(buf) = 0; - *IE_CMD_CFG_IFS(buf) = 0x60; - *IE_CMD_CFG_SLOT_LOW(buf) = 0; - *IE_CMD_CFG_SLOT_HIGH(buf) = 0xf2; - *IE_CMD_CFG_PROMISC(buf) = (!!promiscuous) | (manchester << 2); - *IE_CMD_CFG_CRSCDT(buf) = 0; - *IE_CMD_CFG_MINLEN(buf) = 64; - *IE_CMD_CFG_JUNK(buf) = 0xff; - sc->memcopyout(sc, buf, cmd, IE_CMD_CFG_SZ); - setup_simple_command(sc, IE_CMD_CONFIG, cmd); - IE_BUS_BARRIER(sc, cmd, IE_CMD_CFG_SZ, BUS_SPACE_BARRIER_WRITE); - - cmdresult = i82586_start_cmd(sc, IE_CUC_START, cmd, IE_STAT_COMPL, 0); - status = sc->ie_bus_read16(sc, IE_CMD_COMMON_STATUS(cmd)); - if (cmdresult != 0) { - printf("%s: configure command timed out; status %x\n", - sc->arpcom.ac_if.if_name, status); - return (0); - } - if ((status & IE_STAT_OK) == 0) { - printf("%s: configure command failed; status %x\n", - sc->arpcom.ac_if.if_name, status); - return (0); - } - - /* Squash any pending interrupts */ - ie_ack(sc, IE_ST_WHENCE); - return (1); -} - -static int -ie_ia_setup(struct ie_softc *sc, int cmdbuf) -{ - int cmdresult, status; - - setup_simple_command(sc, IE_CMD_IASETUP, cmdbuf); - - (sc->memcopyout)(sc, sc->arpcom.ac_enaddr, - IE_CMD_IAS_EADDR(cmdbuf), ETHER_ADDR_LEN); - - cmdresult = i82586_start_cmd(sc, IE_CUC_START, cmdbuf, IE_STAT_COMPL, 0); - status = sc->ie_bus_read16(sc, IE_CMD_COMMON_STATUS(cmdbuf)); - if (cmdresult != 0) { - printf("%s: individual address command timed out; status %x\n", - sc->arpcom.ac_if.if_name, status); - return (0); - } - if ((status & IE_STAT_OK) == 0) { - printf("%s: individual address command failed; status %x\n", - sc->arpcom.ac_if.if_name, status); - return (0); - } - - /* Squash any pending interrupts */ - ie_ack(sc, IE_ST_WHENCE); - return (1); -} - -/* - * Run the multicast setup command. - * Called at splnet(). - */ -static int -ie_mc_setup(struct ie_softc *sc, int cmdbuf) -{ - int cmdresult, status; - - if (sc->mcast_count == 0) - return (1); - - setup_simple_command(sc, IE_CMD_MCAST, cmdbuf); - - (sc->memcopyout)(sc, (caddr_t)sc->mcast_addrs, - IE_CMD_MCAST_MADDR(cmdbuf), - sc->mcast_count * ETHER_ADDR_LEN); - - sc->ie_bus_write16(sc, IE_CMD_MCAST_BYTES(cmdbuf), - sc->mcast_count * ETHER_ADDR_LEN); - - /* Start the command */ - cmdresult = i82586_start_cmd(sc, IE_CUC_START, cmdbuf, IE_STAT_COMPL, 0); - status = sc->ie_bus_read16(sc, IE_CMD_COMMON_STATUS(cmdbuf)); - if (cmdresult != 0) { - printf("%s: multicast setup command timed out; status %x\n", - sc->arpcom.ac_if.if_name, status); - return (0); - } - if ((status & IE_STAT_OK) == 0) { - printf("%s: multicast setup command failed; status %x\n", - sc->arpcom.ac_if.if_name, status); - return (0); - } - - /* Squash any pending interrupts */ - ie_ack(sc, IE_ST_WHENCE); - 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 splnet() OR HIGHER. - */ -void -i82586_init(void *arg) -{ - struct ie_softc *sc = arg; - struct ifnet *ifp = &sc->arpcom.ac_if; - int cmd; - - sc->async_cmd_inprogress = 0; - sc->xmit_busy = 0; - -#if I82586_DEBUG - memset(sc->trace_flow, 0, sizeof(sc->trace_flow)); - sc->trace_flow_wrap = 0; -#endif - sc->trace_flow_in = 0; - - cmd = sc->buf_area; - -#if I82586_DEBUG - printf ("%s: sc_debug at 0x%08x\n", sc->arpcom.ac_if.if_name, (unsigned int) &sc->sc_debug); -#endif - - /* - * Send the configure command first. - */ - if (ie_cfg_setup(sc, cmd, sc->promisc, 0) == 0) - return; - - /* - * Send the Individual Address Setup command. - */ - if (ie_ia_setup(sc, cmd) == 0) - return; - - /* - * Run the time-domain reflectometer. - */ - ie_run_tdr(sc, cmd); - - /* - * Set the multi-cast filter, if any - */ - if (ie_mc_setup(sc, cmd) == 0) - return; - - /* - * If no tasks exist, create them. Need to add something to allow - * different names for the different devices. - */ - if (sc->intr_task == 0) - sc->intr_task = rtems_bsdnet_newproc ("IEi0", 2048, i82586_intr_task, sc); - if (sc->tx_task == 0) - sc->tx_task = rtems_bsdnet_newproc ("IEt0", 2048, i82586_tx_task, sc); - - - /* - * Acknowledge any interrupts we have generated thus far. - */ - ie_ack(sc, IE_ST_WHENCE); - - /* - * Set up the transmit and recv buffers. - */ - i82586_setup_bufs(sc); - - if (sc->hwinit) - (sc->hwinit)(sc); - - ifp->if_flags |= IFF_RUNNING; - ifp->if_flags &= ~IFF_OACTIVE; - - if (NTXBUF < 2) - sc->do_xmitnopchain = 0; - - i82586_start_transceiver(sc); -} - -/* - * Start the RU and possibly the CU unit - */ -static void -i82586_start_transceiver(struct ie_softc *sc) -{ -#if I82586_DEBUG - I82586_TRACE(sc, I82586_RX_START, 0); -#endif - - /* - * Start RU at current position in frame & RBD lists. - */ - sc->ie_bus_write16(sc, IE_RFRAME_BUFDESC(sc->rframes,sc->rfhead), - IE_RBD_ADDR(sc->rbds, sc->rbhead)); - - sc->ie_bus_write16(sc, IE_SCB_RCVLST(sc->scb), - IE_RFRAME_ADDR(sc->rframes,sc->rfhead)); - - if (sc->do_xmitnopchain) { - /* Stop transmit command chain */ - if (i82586_start_cmd(sc, IE_CUC_SUSPEND|IE_RUC_SUSPEND, 0, 0, 0)) - printf("%s: CU/RU stop command timed out\n", - sc->arpcom.ac_if.if_name); - - /* Start the receiver & transmitter chain */ - /* sc->scb->ie_command_list = - IEADDR(sc->nop_cmds[(sc->xctail+NTXBUF-1) % NTXBUF]);*/ - sc->ie_bus_write16(sc, IE_SCB_CMDLST(sc->scb), - IE_CMD_NOP_ADDR( - sc->nop_cmds, - (sc->xctail + NTXBUF - 1) % NTXBUF)); - - if (i82586_start_cmd(sc, IE_CUC_START|IE_RUC_START, 0, 0, 0)) - printf("%s: CU/RU command timed out\n", - sc->arpcom.ac_if.if_name); - } else { - if (i82586_start_cmd(sc, IE_RUC_START, 0, 0, 0)) - printf("%s: RU command timed out\n", - sc->arpcom.ac_if.if_name); - } -} - -void -i82586_stop(struct ifnet *ifp, int disable) -{ - struct ie_softc *sc = ifp->if_softc; - - if (i82586_start_cmd(sc, IE_RUC_SUSPEND | IE_CUC_SUSPEND, 0, 0, 0)) - printf("%s: iestop: disable commands timed out\n", - sc->arpcom.ac_if.if_name); -} - -int -i82586_ioctl(struct ifnet *ifp, ioctl_command_t cmd, caddr_t data) -{ - struct ie_softc *sc = ifp->if_softc; -/* struct ifreq *ifr = (struct ifreq *)data; */ - int s; - int error = 0; - - s = splnet(); - switch(cmd) { - case SIOCGIFMEDIA: - case SIOCSIFMEDIA: - break; - case SIO_RTEMS_SHOW_STATS: -#if I82586_DEBUG - print_softie(sc); -#endif - break; - default: - error = ether_ioctl(ifp, cmd, data); - if (error == ENETRESET) { - /* - * Multicast list has changed; set the hardware filter - * accordingly. - */ - ie_mc_reset(sc); - error = 0; - } - break; - } -#if I82586_DEBUG - if (cmd == SIOCSIFFLAGS) - sc->sc_debug = (ifp->if_flags & IFF_DEBUG) ? IED_ALL : 0; -#endif - splx(s); - return (error); -} - -static void -ie_mc_reset(struct ie_softc *sc) -{ - struct ether_multi *enm; - struct ether_multistep step; - int size; - - /* - * Step through the list of addresses. - */ - again: - size = 0; - sc->mcast_count = 0; - ETHER_FIRST_MULTI(step, &sc->arpcom, enm); - while (enm) { - size += 6; - if (sc->mcast_count >= IE_MAXMCAST || - memcmp(enm->enm_addrlo, enm->enm_addrhi, 6) != 0) { - sc->arpcom.ac_if.if_flags |= IFF_ALLMULTI; - i82586_ioctl(&sc->arpcom.ac_if, - SIOCSIFFLAGS, (void *)0); - return; - } - ETHER_NEXT_MULTI(step, enm); - } - - if (size > sc->mcast_addrs_size) { - /* Need to allocate more space */ - if (sc->mcast_addrs_size) - free(sc->mcast_addrs, M_IPMADDR); - sc->mcast_addrs = (char *) - malloc(size, M_IPMADDR, M_WAITOK); - sc->mcast_addrs_size = size; - } - - /* - * We've got the space; now copy the addresses - */ - ETHER_FIRST_MULTI(step, &sc->arpcom, enm); - while (enm) { - if (sc->mcast_count >= IE_MAXMCAST) - goto again; /* Just in case */ - - memcpy(&sc->mcast_addrs[sc->mcast_count], enm->enm_addrlo, 6); - sc->mcast_count++; - ETHER_NEXT_MULTI(step, enm); - } - sc->want_mcsetup = 1; -} - -/* - * Media change callback. - */ -int -i82586_mediachange(struct ifnet *ifp) -{ - struct ie_softc *sc = ifp->if_softc; - - if (sc->sc_mediachange) - return ((*sc->sc_mediachange)(sc)); - return (0); -} - -/* - * Media status callback. - */ -void -i82586_mediastatus(struct ifnet *ifp, struct ifmediareq *ifmr) -{ - struct ie_softc *sc = ifp->if_softc; - - if (sc->sc_mediastatus) - (*sc->sc_mediastatus)(sc, ifmr); -} - -#if I82586_DEBUG -static void -print_softie(struct ie_softc *sc) -{ - static char *trace_labels[] = { - "INTS_REQ", - "INTS_IN", - "INTS_LOOPS", - "INTS_OUT", - "RX_INT", - "RX_DROP", - "RX_ERR", - "RX_OK", - "RX_START", - "START_TX", - "TX_START", - "TX_INT", - "TX_REQ", - "TX_EVT", - "TX_EMIT", - "TX_BAD", - "TX_ACTIVE", - "TRACE_CNT" - }; - - int i; - - printf("i82586 %s:\n", sc->arpcom.ac_if.if_name); - - printf(" iobase=%p\n", sc->sc_iobase); - - printf(" scp=0x%08x\t\tiscp=0x%08x\t\tscb=0x%08x\n", - sc->scp, sc->iscp, sc->scb); - printf(" buf_area=0x%08x\tbuf_area_sz=0x%08x\n", - sc->buf_area, sc->buf_area_sz); - printf(" rframes=0x%08x\trbds=0x%08x\t\trbufs=0x%08x\n", - sc->rframes, sc->rbds, sc->rbufs); - printf(" nop_cmds=0x%08x\txmit_cmds=0x%08x\n", - sc->nop_cmds, sc->xmit_cmds); - printf(" xbds=0x%08x\txbufs=0x%08x\n\n", - sc->xbds, sc->xbufs); - printf(" rfhead=%d\trftail=%d\n", - sc->rfhead, sc->rftail); - printf(" rbhead=%d\trbtail=%d\n", - sc->rbhead, sc->rbtail); - printf(" nframes=%d\tnrxbuf=%d\trnr_expect=%d\n", - sc->nframes, sc->nrxbuf, sc->rnr_expect); - printf(" xchead=%d\txctail=%d\n", - sc->xchead, sc->xctail); - printf(" xmit_busy=%d\txmit_req=%d\tdo_xmitnopchain=%d\n", - sc->xmit_busy, sc->xmit_req, sc->do_xmitnopchain); - printf(" promisc=%d\tasync_cmd_inprogress=%d\n\n", - sc->promisc, sc->async_cmd_inprogress); - - { - int cnt; - int in; - int lfdone = 0; - char *tabs; - - if (!sc->trace_flow_wrap) { - cnt = sc->trace_flow_in; - in = 0; - } - else { - cnt = I82586_TRACE_FLOW; - in = sc->trace_flow_in; - } - - sc->trace_flow_in = sc->trace_flow_wrap = 0; - - cnt /= 2; - - for (i = 0; i < cnt; i++) { - if (!lfdone) { - switch (sc->trace_flow[in]) { - case I82586_INTS_REQ: - case I82586_INTS_IN: - printf("\n"); - } - } - - lfdone = 0; - - if (strlen(trace_labels[sc->trace_flow[in]]) < 8) - tabs = "\t\t"; - else - tabs = "\t"; - - printf(" %d\t%s%s0x%08x (%d)\n", - i, trace_labels[sc->trace_flow[in]], tabs, - sc->trace_flow[in + 1], sc->trace_flow[in + 1]); - - switch (sc->trace_flow[in]) { - case I82586_INTS_REQ: - case I82586_INTS_OUT: - lfdone = 1; - printf("\n"); - } - - in += 2; - - if (in >= I82586_TRACE_FLOW) - in = 0; - } - } -} - -static void -print_rbd(struct ie_softc *sc, int n) -{ - printf("RBD at %08x:\n status %04x, next %04x, buffer %lx\n" - "length/EOL %04x\n", IE_RBD_ADDR(sc->rbds,n), - sc->ie_bus_read16(sc, IE_RBD_STATUS(sc->rbds,n)), - sc->ie_bus_read16(sc, IE_RBD_NEXT(sc->rbds,n)), - (u_long)0,/*bus_space_read_4(sc->bt, sc->bh, IE_RBD_BUFADDR(sc->rbds,n)),-* XXX */ - sc->ie_bus_read16(sc, IE_RBD_BUFLEN(sc->rbds,n))); -} - -#endif |