/* $NetBSD: if_qt.c,v 1.21.8.2 2019/10/24 16:06:09 martin Exp $ */ /* * Copyright (c) 1992 Steven M. Schultz * 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. The name of the author may not be used to endorse or promote products * derived from this software without specific prior written permission * * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. * IN NO EVENT SHALL THE AUTHOR 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. * * @(#)if_qt.c 1.2 (2.11BSD) 2/20/93 */ /* * * Modification History * 23-Feb-92 -- sms * Rewrite the buffer handling so that fewer than the maximum number of * buffers may be used (32 receive and 12 transmit buffers consume 66+kb * of main system memory in addition to the internal structures in the * networking code). A freelist of available buffers is maintained now. * When I/O operations complete the associated buffer is placed on the * freelist (a single linked list for simplicity) and when an I/O is * started a buffer is pulled off the list. * * 20-Feb-92 -- sms * It works! Darned board couldn't handle "short" rings - those rings * where only half the entries were made available to the board (the * ring descriptors were the full size, merely half the entries were * flagged as belonging always to the driver). Grrrr. Would have thought * the board could skip over those entries reserved by the driver. * Now to find a way not to have to allocated 32+12 times 1.5kb worth of * buffers... * * 03-Feb-92 -- sms * Released but still not working. The driver now responds to arp and * ping requests. The board is apparently not returning ring descriptors * to the driver so eventually we run out of buffers. Back to the * drawing board. * * 28-Dec-92 -- sms * Still not released. Hiatus in finding free time and thin-netting * the systems (many thanks Terry!). * Added logic to dynamically allocate a vector and initialize it. * * 23-Oct-92 -- sms * The INIT block must (apparently) be quadword aligned [no thanks to * the manual for not mentioning that fact]. The necessary alignment * is achieved by allocating the INIT block from main memory ('malloc' * guarantees click alignment) and mapping it as needed (which is _very_ * infrequently). A check for quadword alignment of the ring descriptors * was added - at present the descriptors are properly aligned, if this * should change then something will have to be done (like do it "right"). * Darned alignment restrictions! * * A couple of typos were corrected (missing parentheses, reversed * arguments to printf calls, etc). * * 13-Oct-92 -- sms@wlv.iipo.gtegsc.com * Created based on the DELQA-PLUS addendum to DELQA User's Guide. * This driver ('qt') is selected at system configuration time. If the * board * is not a DELQA-YM an error message will be printed and the * interface will not be attached. */ #include __KERNEL_RCSID(0, "$NetBSD: if_qt.c,v 1.21.8.2 2019/10/24 16:06:09 martin Exp $"); #include "opt_inet.h" #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #ifdef INET #include #include #include #include #include #endif #include #include #include #include #define NRCV QT_MAX_RCV /* Receive descriptors (must be == 32) */ #define NXMT QT_MAX_XMT /* Transmit descriptors (must be == 12) */ #if NRCV != 32 || NXMT != 12 hardware requires these sizes. #endif /* * Control data structures, must be in DMA-friendly memory. */ struct qt_cdata { struct qt_init qc_init; /* Init block */ struct qt_rring qc_r[NRCV]; /* Receive descriptor ring */ struct qt_tring qc_t[NXMT]; /* Transmit descriptor ring */ }; struct qt_softc { device_t sc_dev; /* Configuration common part */ struct ethercom is_ec; /* common part - must be first */ struct uba_softc *sc_uh; struct evcnt sc_intrcnt; /* Interrupt counting */ #define is_if is_ec.ec_if /* network-visible interface */ u_int8_t is_addr[ETHER_ADDR_LEN]; /* hardware Ethernet address */ bus_space_tag_t sc_iot; bus_addr_t sc_ioh; struct ubinfo sc_ui; /* control block address desc */ struct qt_cdata *sc_ib; /* virt address of ctrl block */ struct qt_cdata *sc_pib; /* phys address of ctrl block */ struct ifubinfo sc_ifuba; /* UNIBUS resources */ struct ifrw sc_ifr[NRCV]; /* UNIBUS receive buffer maps */ struct ifxmt sc_ifw[NXMT]; /* UNIBUS receive buffer maps */ int rindex; /* Receive Completed Index */ int nxtrcv; /* Next Receive Index */ int nrcv; /* Number of Receives active */ int xnext; /* Next descriptor to transmit */ int xlast; /* Last descriptor transmitted */ int nxmit; /* # packets in send queue */ short vector; /* Interrupt vector assigned */ }; static int qtmatch(device_t, cfdata_t, void *); static void qtattach(device_t, device_t, void *); static void qtintr(void *); static int qtinit(struct ifnet *); static int qtioctl(struct ifnet *, u_long, void *); static int qtturbo(struct qt_softc *); static void qtstart(struct ifnet *ifp); static void qtstop(struct ifnet *ifp, int disable); static void qtsrr(struct qt_softc *, int); static void qtrint(struct qt_softc *sc); static void qttint(struct qt_softc *sc); /* static void qtrestart(struct qt_softc *sc); */ CFATTACH_DECL_NEW(qt, sizeof(struct qt_softc), qtmatch, qtattach, NULL, NULL); /* * Maximum packet size needs to include 4 bytes for the CRC * on received packets. */ #define MAXPACKETSIZE (ETHERMTU + sizeof (struct ether_header) + 4) #define MINPACKETSIZE 64 #define QT_WCSR(csr, val) \ bus_space_write_2(sc->sc_iot, sc->sc_ioh, csr, val) #define QT_RCSR(csr) \ bus_space_read_2(sc->sc_iot, sc->sc_ioh, csr) #define loint(x) ((int)(x) & 0xffff) #define hiint(x) (((int)(x) >> 16) & 0x3f) /* * Check if this card is a turbo delqa. */ int qtmatch(device_t parent, cfdata_t cf, void *aux) { struct qt_softc ssc; struct qt_softc *sc = &ssc; struct uba_attach_args *ua = aux; struct uba_softc *uh = device_private(parent); struct qt_init *qi; struct ubinfo ui; sc->sc_iot = ua->ua_iot; sc->sc_ioh = ua->ua_ioh; if (qtturbo(sc) == 0) return 0; /* Not a turbo card */ /* Force the card to interrupt */ ui.ui_size = sizeof(struct qt_init); if (ubmemalloc(uh, &ui, 0)) return 0; /* Failed */ qi = (struct qt_init *)ui.ui_vaddr; memset(qi, 0, sizeof(struct qt_init)); qi->vector = uh->uh_lastiv - 4; qi->options = INIT_OPTIONS_INT; QT_WCSR(CSR_IBAL, loint(ui.ui_baddr)); QT_WCSR(CSR_IBAH, hiint(ui.ui_baddr)); QT_WCSR(CSR_SRQR, 2); delay(100000); /* Wait some time for interrupt */ QT_WCSR(CSR_SRQR, 3); /* Stop card */ ubmemfree(uh, &ui); return 10; } /* * Interface exists. More accurately, something exists at the CSR (see * sys/sys_net.c) -- there's no guarantee it's a DELQA-YM. * * The ring descriptors are initialized, the buffers allocated using first the * DMA region allocated at network load time and then later main memory. The * INIT block is filled in and the device is poked/probed to see if it really * is a DELQA-YM. If the device is not a -YM then a message is printed and * the 'if_attach' call is skipped. For a -YM the START command is issued, * but the device is not marked as running|up - that happens at interrupt level * when the device interrupts to say it has started. */ void qtattach(device_t parent, device_t self, void *aux) { struct qt_softc *sc = device_private(self); struct ifnet *ifp = &sc->is_if; struct uba_attach_args *ua = aux; sc->sc_dev = self; uba_intr_establish(ua->ua_icookie, ua->ua_cvec, qtintr, sc, &sc->sc_intrcnt); evcnt_attach_dynamic(&sc->sc_intrcnt, EVCNT_TYPE_INTR, ua->ua_evcnt, device_xname(sc->sc_dev), "intr"); sc->sc_uh = device_private(parent); sc->sc_iot = ua->ua_iot; sc->sc_ioh = ua->ua_ioh; sc->sc_uh->uh_lastiv -= 4; sc->vector = sc->sc_uh->uh_lastiv; /* * Now allocate the buffers and initialize the buffers. This should _never_ * fail because main memory is allocated after the DMA pool is used up. */ sc->is_addr[0] = QT_RCSR(0); sc->is_addr[1] = QT_RCSR(2); sc->is_addr[2] = QT_RCSR(4); sc->is_addr[3] = QT_RCSR(6); sc->is_addr[4] = QT_RCSR(8); sc->is_addr[5] = QT_RCSR(10); strcpy(ifp->if_xname, device_xname(sc->sc_dev)); ifp->if_softc = sc; ifp->if_flags = IFF_BROADCAST|IFF_MULTICAST; ifp->if_ioctl = qtioctl; ifp->if_start = qtstart; ifp->if_init = qtinit; ifp->if_stop = qtstop; IFQ_SET_READY(&ifp->if_snd); printf("\n%s: delqa-plus in Turbo mode, hardware address %s\n", device_xname(sc->sc_dev), ether_sprintf(sc->is_addr)); if_attach(ifp); ether_ifattach(ifp, sc->is_addr); } int qtturbo(struct qt_softc *sc) { int i; /* * Issue the software reset. Delay 150us. The board should now be in * DELQA-Normal mode. Set ITB and DEQTA select. If both bits do not * stay turned on then the board is not a DELQA-YM. */ QT_WCSR(CSR_ARQR, ARQR_SR); QT_WCSR(CSR_ARQR, 0); delay(150L); QT_WCSR(CSR_SRR, 0x8001); /* MS | ITB */ i = QT_RCSR(CSR_SRR); QT_WCSR(CSR_SRR, 0x8000); /* Turn off ITB, set DELQA select */ if (i != 0x8001) return(0); /* * Board is a DELQA-YM. Send the commands to enable Turbo mode. Delay * 1 second, testing the SRR register every millisecond to see if the * board has shifted to Turbo mode. */ QT_WCSR(CSR_XCR0, 0x0baf); QT_WCSR(CSR_XCR1, 0xff00); for (i = 0; i < 1000; i++) { if ((QT_RCSR(CSR_SRR) & SRR_RESP) == 1) break; delay(1000L); } if (i >= 1000) { printf("qt !Turbo\n"); return(0); } return(1); } int qtinit(struct ifnet *ifp) { struct qt_softc *sc = ifp->if_softc; struct qt_init *iniblk; struct ifrw *ifrw; struct ifxmt *ifxp; struct qt_rring *rp; struct qt_tring *tp; int i, error; if (ifp->if_flags & IFF_RUNNING) { /* Cancel any pending I/O. */ qtstop(ifp, 0); } if (sc->sc_ib == NULL) { if (if_ubaminit(&sc->sc_ifuba, sc->sc_uh, MCLBYTES, sc->sc_ifr, NRCV, sc->sc_ifw, NXMT)) { printf("%s: can't initialize\n", device_xname(sc->sc_dev)); ifp->if_flags &= ~IFF_UP; return 0; } sc->sc_ui.ui_size = sizeof(struct qt_cdata); if ((error = ubmemalloc(sc->sc_uh, &sc->sc_ui, 0))) { printf(": failed ubmemalloc(), error = %d\n", error); return error; } sc->sc_ib = (struct qt_cdata *)sc->sc_ui.ui_vaddr; sc->sc_pib = (struct qt_cdata *)sc->sc_ui.ui_baddr; /* * Fill in most of the INIT block: vector, options (interrupt enable), ring * locations. The physical address is copied from the ROMs as part of the * -YM testing procedure. The CSR is saved here rather than in qtinit() * because the qtturbo() routine needs it. * * The INIT block must be quadword aligned. Using malloc() guarantees click * (64 byte) alignment. Since the only time the INIT block is referenced is * at 'startup' or 'reset' time there is really no time penalty (and a modest * D space savings) involved. */ memset(sc->sc_ib, 0, sizeof(struct qt_cdata)); iniblk = &sc->sc_ib->qc_init; iniblk->vector = sc->vector; memcpy(iniblk->paddr, sc->is_addr, 6); iniblk->options = INIT_OPTIONS_INT; iniblk->rx_lo = loint(&sc->sc_pib->qc_r); iniblk->rx_hi = hiint(&sc->sc_pib->qc_r); iniblk->tx_lo = loint(&sc->sc_pib->qc_t); iniblk->tx_hi = hiint(&sc->sc_pib->qc_t); } iniblk = &sc->sc_ib->qc_init; iniblk->mode = ifp->if_flags & IFF_PROMISC ? INIT_MODE_PRO : 0; /* * Now initialize the receive ring descriptors. Because this routine can be * called with outstanding I/O operations we check the ring descriptors for * a non-zero 'rhost0' (or 'thost0') word and place those buffers back on * the free list. */ for (i = 0; i < NRCV; i++) { rp = &sc->sc_ib->qc_r[i]; ifrw = &sc->sc_ifr[i]; rp->rmd1 = MCLBYTES; rp->rmd4 = loint(ifrw->ifrw_info); rp->rmd5 = hiint(ifrw->ifrw_info); rp->rmd3 = 0; /* clear RMD3_OWN */ } for (i = 0; i < NXMT; i++) { tp = &sc->sc_ib->qc_t[i]; ifxp = &sc->sc_ifw[i]; tp->tmd4 = loint(ifxp->ifw_info); tp->tmd5 = hiint(ifxp->ifw_info); tp->tmd3 = TMD3_OWN; } sc->xnext = sc->xlast = sc->nxmit = 0; sc->rindex = 0; sc->nxtrcv = 0; sc->nrcv = 0; /* * Now we tell the device the address of the INIT block. The device * _must_ be in the Turbo mode at this time. The "START" command is * then issued to the device. A 1 second timeout is then started. * When the interrupt occurs the IFF_UP|IFF_RUNNING state is entered and * full operations will proceed. If the timeout expires without an interrupt * being received an error is printed, the flags cleared and the device left * marked down. */ QT_WCSR(CSR_IBAL, loint(&sc->sc_pib->qc_init)); QT_WCSR(CSR_IBAH, hiint(&sc->sc_pib->qc_init)); QT_WCSR(CSR_SRQR, 2); sc->is_if.if_flags |= IFF_RUNNING; return 0; } /* * Start output on interface. */ void qtstart(struct ifnet *ifp) { int len, nxmit; struct qt_softc *sc = ifp->if_softc; struct qt_tring *rp; struct mbuf *m = NULL; for (nxmit = sc->nxmit; nxmit < NXMT; nxmit++) { IF_DEQUEUE(&sc->is_if.if_snd, m); if (m == 0) break; rp = &sc->sc_ib->qc_t[sc->xnext]; if ((rp->tmd3 & TMD3_OWN) == 0) panic("qtstart"); bpf_mtap(ifp, m); len = if_ubaput(&sc->sc_ifuba, &sc->sc_ifw[sc->xnext], m); if (len < MINPACKETSIZE) len = MINPACKETSIZE; rp->tmd3 = len & TMD3_BCT; /* set length,clear ownership */ QT_WCSR(CSR_ARQR, ARQR_TRQ); /* tell device it has buffer */ if (++sc->xnext >= NXMT) sc->xnext = 0; } if (sc->nxmit != nxmit) sc->nxmit = nxmit; /* XXX - set OACTIVE */ } /* * General interrupt service routine. Receive, transmit, device start * interrupts and timeouts come here. Check for hard device errors and print a * message if any errors are found. If we are waiting for the device to * START then check if the device is now running. */ void qtintr(void *arg) { struct qt_softc *sc = arg; struct ifnet *ifp = &sc->is_if; short status; status = QT_RCSR(CSR_SRR); if (status < 0) /* should we reset the device after a bunch of these errs? */ qtsrr(sc, status); if ((ifp->if_flags & IFF_UP) == 0) return; /* Unwanted interrupt */ qtrint(sc); qttint(sc); qtstart(&sc->is_ec.ec_if); } /* * Transmit interrupt service. Only called if there are outstanding transmit * requests which could have completed. The DELQA-YM doesn't provide the * status bits telling the kind (receive, transmit) of interrupt. */ #define BBLMIS (TMD2_BBL|TMD2_MIS) void qttint(struct qt_softc *sc) { struct qt_tring *rp; while (sc->nxmit > 0) { rp = &sc->sc_ib->qc_t[sc->xlast]; if ((rp->tmd3 & TMD3_OWN) == 0) break; sc->is_if.if_opackets++; /* * Collisions don't count as output errors, but babbling and missing packets * do count as output errors. */ if (rp->tmd2 & TMD2_CER) sc->is_if.if_collisions++; if ((rp->tmd0 & TMD0_ERR1) || ((rp->tmd2 & TMD2_ERR2) && (rp->tmd2 & BBLMIS))) { #ifdef QTDEBUG char buf[100]; snprintb(buf, sizeof(buf), TMD2_BITS, rp->tmd2); printf("%s: tmd2 %s\n", device_xname(sc->sc_dev), buf); #endif sc->is_if.if_oerrors++; } if_ubaend(&sc->sc_ifuba, &sc->sc_ifw[sc->xlast]); if (++sc->xlast >= NXMT) sc->xlast = 0; sc->nxmit--; } } /* * Receive interrupt service. Pull packet off the interface and put into * a mbuf chain for processing later. */ void qtrint(struct qt_softc *sc) { struct qt_rring *rp; struct ifnet *ifp = &sc->is_ec.ec_if; struct mbuf *m; int len; while (sc->sc_ib->qc_r[(int)sc->rindex].rmd3 & RMD3_OWN) { rp = &sc->sc_ib->qc_r[(int)sc->rindex]; if ((rp->rmd0 & (RMD0_STP|RMD0_ENP)) != (RMD0_STP|RMD0_ENP)) { printf("%s: chained packet\n", device_xname(sc->sc_dev)); sc->is_if.if_ierrors++; goto rnext; } len = (rp->rmd1 & RMD1_MCNT) - 4; /* -4 for CRC */ if ((rp->rmd0 & RMD0_ERR3) || (rp->rmd2 & RMD2_ERR4)) { #ifdef QTDEBUG char buf[100]; snprintb(buf, sizeof(buf), RMD0_BITS, rp->rmd0); printf("%s: rmd0 %s\n", device_xname(sc->sc_dev), buf); snprintb(buf, sizeof(buf), RMD2_BITS, rp->rmd2); printf("%s: rmd2 %s\n", device_xname(sc->sc_dev), buf); #endif sc->is_if.if_ierrors++; goto rnext; } m = if_ubaget(&sc->sc_ifuba, &sc->sc_ifr[(int)sc->rindex], ifp, len); if (m == 0) { sc->is_if.if_ierrors++; goto rnext; } if_percpuq_enqueue(ifp->if_percpuq, m); rnext: --sc->nrcv; rp->rmd3 = 0; rp->rmd1 = MCLBYTES; if (++sc->rindex >= NRCV) sc->rindex = 0; } QT_WCSR(CSR_ARQR, ARQR_RRQ); /* tell device it has buffer */ } int qtioctl(struct ifnet *ifp, u_long cmd, void *data) { int s, error; s = splnet(); error = ether_ioctl(ifp, cmd, data); if (error == ENETRESET) { if (ifp->if_flags & IFF_RUNNING) error = qtinit(ifp); else error = 0; } splx(s); return (error); } void qtsrr(struct qt_softc *sc, int srrbits) { char buf[100]; snprintb(buf, sizeof(buf), SRR_BITS, srrbits); printf("%s: srr=%s\n", device_xname(sc->sc_dev), buf); } /* * Stop activity on the interface. * Lose outstanding transmit requests. XXX - not good for multicast. */ void qtstop(struct ifnet *ifp, int disable) { struct qt_softc *sc = ifp->if_softc; int i; QT_WCSR(CSR_SRQR, 3); for (i = 0; i < 100; i++) if ((QT_RCSR(CSR_SRR) & SRR_RESP) == 3) break; if (QT_RCSR(CSR_SRR) & SRR_FES) qtsrr(sc, QT_RCSR(CSR_SRR)); /* Forget already queued transmit requests */ while (sc->nxmit > 0) { if_ubaend(&sc->sc_ifuba, &sc->sc_ifw[sc->xlast]); if (++sc->xlast >= NXMT) sc->xlast = 0; sc->nxmit--; } /* Handle late received packets */ qtrint(sc); ifp->if_flags &= ~IFF_RUNNING; } #ifdef notyet /* * Reset the device. This moves it from DELQA-T mode to DELQA-Normal mode. * After the reset put the device back in -T mode. Then call qtinit() to * reinitialize the ring structures and issue the 'timeout' for the "device * started interrupt". */ void qtreset(sc) struct qt_softc *sc; { qtturbo(sc); qtinit(&sc->is_ec.ec_if); } #endif