/* $NetBSD: mx98905.c,v 1.16 2018/09/03 16:29:31 riastradh Exp $ */ /*- * Copyright (c) 1997, 1998 The NetBSD Foundation, Inc. * All rights reserved. * * This code is derived from software contributed to The NetBSD Foundation * by Jason R. Thorpe of the Numerical Aerospace Simulation Facility, * NASA Ames Research Center. * * 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. * * 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. */ /* * Device driver for National Semiconductor DS8390/WD83C690 based ethernet * adapters. * * Copyright (c) 1994, 1995 Charles M. Hannum. All rights reserved. * * 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. */ /* * Special routines for the Macronix MX 98905. For use with the "ne" driver. */ /* * : * There are 2 types of etherh card. One uses the macronics chipset MX98905 * and that chipset has a bug in it, in that it the MSB remote DMA * register does not work. There is a workaround for this which * should be around soon. In fact, I think only the buffer ram test * ever transfers more than 256 bytes across the DMA channel, so diabling * it will make the mx stuff work. */ #include __KERNEL_RCSID(0, "$NetBSD: mx98905.c,v 1.16 2018/09/03 16:29:31 riastradh Exp $"); #include #include #include #include #include #include #include #include #include #include #include #include #include #include #ifndef __BUS_SPACE_HAS_STREAM_METHODS #define bus_space_write_stream_2 bus_space_write_2 #define bus_space_write_multi_stream_2 bus_space_write_multi_2 #define bus_space_read_multi_stream_2 bus_space_read_multi_2 #endif /* __BUS_SPACE_HAS_STREAM_METHODS */ static inline void mx98905_write_setup(struct dp8390_softc *, int, int); static inline void mx98905_write_wait(struct dp8390_softc *); void mx98905_attach(struct dp8390_softc *sc) { sc->ring_copy = mx98905_ring_copy; sc->write_mbuf = mx98905_write_mbuf; sc->read_hdr = mx98905_read_hdr; } static inline void mx98905_write_setup(struct dp8390_softc *sc, int len, int buf) { bus_space_tag_t nict = sc->sc_regt; bus_space_handle_t nich = sc->sc_regh; /* Select page 0 registers. */ NIC_BARRIER(nict, nich); bus_space_write_1(nict, nich, ED_P0_CR, ED_CR_RD2 | ED_CR_PAGE_0 | ED_CR_STA); NIC_BARRIER(nict, nich); /* Reset remote DMA complete flag. */ bus_space_write_1(nict, nich, ED_P0_ISR, ED_ISR_RDC); NIC_BARRIER(nict, nich); /* Set up DMA byte count. */ bus_space_write_1(nict, nich, ED_P0_RBCR0, len); bus_space_write_1(nict, nich, ED_P0_RBCR1, len >> 8); /* Set up destination address in NIC mem. */ bus_space_write_1(nict, nich, ED_P0_RSAR0, buf); bus_space_write_1(nict, nich, ED_P0_RSAR1, buf >> 8); /* Set remote DMA write. */ NIC_BARRIER(nict, nich); bus_space_write_1(nict, nich, ED_P0_CR, ED_CR_RD1 | ED_CR_PAGE_0 | ED_CR_STA); NIC_BARRIER(nict, nich); } static inline void mx98905_write_wait(struct dp8390_softc *sc) { int maxwait = 100; /* about 120us */ bus_space_tag_t nict = sc->sc_regt; bus_space_handle_t nich = sc->sc_regh; /* * Wait for remote DMA to complete. This is necessary because on the * transmit side, data is handled internally by the NIC in bursts, and * we can't start another remote DMA until this one completes. Not * waiting causes really bad things to happen - like the NIC wedging * the bus. */ while (((bus_space_read_1(nict, nich, ED_P0_ISR) & ED_ISR_RDC) != ED_ISR_RDC) && --maxwait) { bus_space_read_1(nict, nich, ED_P0_CRDA1); bus_space_read_1(nict, nich, ED_P0_CRDA0); NIC_BARRIER(nict, nich); DELAY(1); } if (maxwait == 0) { log(LOG_WARNING, "%s: remote transmit DMA failed to complete\n", device_xname(sc->sc_dev)); dp8390_reset(sc); } } /* * Write an mbuf chain to the destination NIC memory address using programmed * I/O. */ int mx98905_write_mbuf(struct dp8390_softc *sc, struct mbuf *m, int buf) { struct ne2000_softc *nsc = (struct ne2000_softc *)sc; bus_space_tag_t nict = sc->sc_regt; bus_space_handle_t nich = sc->sc_regh; bus_space_tag_t asict = nsc->sc_asict; bus_space_handle_t asich = nsc->sc_asich; int savelen, dmalen, resid, len; u_int8_t *data, savebyte[2]; int l, leftover; #ifdef DIAGNOSTIC u_int8_t *lim; #endif int i; resid = savelen = m->m_pkthdr.len; dmalen = uimin(resid, 254); mx98905_write_setup(sc, dmalen, buf); buf += dmalen; resid -= dmalen; /* * Transfer the mbuf chain to the NIC memory. NE2000 cards * require that data be transferred as words, and only words, * so that case requires some extra code to patch over odd-length * mbufs. */ /* NE2000s are a bit trickier. */ /* Start out with no leftover data. */ leftover = 0; savebyte[0] = savebyte[1] = 0; for (; m != 0; m = m->m_next) { l = m->m_len; if (l == 0) continue; data = mtod(m, u_int8_t *); #ifdef DIAGNOSTIC lim = data + l; #endif while (l > 0) { if (leftover) { /* * Data left over (from mbuf or * realignment). Buffer the next * byte, and write it and the leftover * data out. */ savebyte[1] = *data++; l--; bus_space_write_stream_2(asict, asich, NE2000_ASIC_DATA, *(u_int16_t *)savebyte); dmalen -= 2; leftover = 0; } else if (BUS_SPACE_ALIGNED_POINTER(data, u_int16_t) == 0) { /* Unaligned data; buffer the next byte. */ savebyte[0] = *data++; l--; leftover = 1; } else { /* * Aligned data; output contiguous * words as much as we can, then * buffer the remaining byte, if any. */ len = uimin(l, dmalen); leftover = len & 1; len &= ~1; bus_space_write_multi_stream_2(asict, asich, NE2000_ASIC_DATA, (u_int16_t *)data, len >> 1); dmalen -= len; data += len; if (leftover) savebyte[0] = *data++; l -= len + leftover; } if (dmalen == 0 && resid > 0) { mx98905_write_wait(sc); dmalen = uimin(resid, 254); mx98905_write_setup(sc, dmalen, buf); buf += dmalen; resid -= dmalen; } } if (l < 0) panic("mx98905_write_mbuf: negative len"); #ifdef DIAGNOSTIC if (data != lim) panic("mx98905_write_mbuf: data != lim"); #endif } if (leftover) { savebyte[1] = 0; bus_space_write_stream_2(asict, asich, NE2000_ASIC_DATA, *(u_int16_t *)savebyte); } if (savelen < ETHER_MIN_LEN - ETHER_CRC_LEN) { for(i = 0; i < (ETHER_MIN_LEN - ETHER_CRC_LEN - savelen) >> 1; i++) bus_space_write_stream_2(asict, asich, NE2000_ASIC_DATA, 0); savelen = ETHER_MIN_LEN - ETHER_CRC_LEN; } NIC_BARRIER(nict, nich); mx98905_write_wait(sc); return (savelen); } /* * Given a source and destination address, copy 'amout' of a packet from * the ring buffer into a linear destination buffer. Takes into account * ring-wrap. */ int mx98905_ring_copy(struct dp8390_softc *sc, int src, void *vdst, u_short amount) { struct ne2000_softc *nsc = (struct ne2000_softc *)sc; uint8_t *dst = vdst; bus_space_tag_t nict = sc->sc_regt; bus_space_handle_t nich = sc->sc_regh; bus_space_tag_t asict = nsc->sc_asict; bus_space_handle_t asich = nsc->sc_asich; u_short tmp_amount; int useword = nsc->sc_useword; /* Does copy wrap to lower addr in ring buffer? */ if (src + amount > sc->mem_end) { tmp_amount = sc->mem_end - src; /* Copy amount up to end of NIC memory. */ mx98905_readmem(nict, nich, asict, asich, src, (u_int8_t *)dst, tmp_amount, useword); amount -= tmp_amount; src = sc->mem_ring; dst += tmp_amount; } mx98905_readmem(nict, nich, asict, asich, src, dst, amount, useword); return (src + amount); } void mx98905_read_hdr(struct dp8390_softc *sc, int buf, struct dp8390_ring *hdr) { struct ne2000_softc *nsc = (struct ne2000_softc *)sc; mx98905_readmem(sc->sc_regt, sc->sc_regh, nsc->sc_asict, nsc->sc_asich, buf, (u_int8_t *)hdr, sizeof(struct dp8390_ring), nsc->sc_useword); #if BYTE_ORDER == BIG_ENDIAN hdr->count = bswap16(hdr->count); #endif } static inline void mx98905_read_setup(bus_space_tag_t nict, bus_space_handle_t nich, int len, int buf) { /* Select page 0 registers. */ NIC_BARRIER(nict, nich); bus_space_write_1(nict, nich, ED_P0_CR, ED_CR_RD2 | ED_CR_PAGE_0 | ED_CR_STA); NIC_BARRIER(nict, nich); /* Set up DMA byte count. */ bus_space_write_1(nict, nich, ED_P0_RBCR0, len); bus_space_write_1(nict, nich, ED_P0_RBCR1, len >> 8); /* Set up source address in NIC mem. */ bus_space_write_1(nict, nich, ED_P0_RSAR0, buf); bus_space_write_1(nict, nich, ED_P0_RSAR1, buf >> 8); NIC_BARRIER(nict, nich); bus_space_write_1(nict, nich, ED_P0_CR, ED_CR_RD0 | ED_CR_PAGE_0 | ED_CR_STA); bus_space_barrier(nict, nich, 0, NE2000_NPORTS, BUS_SPACE_BARRIER_READ | BUS_SPACE_BARRIER_WRITE); } /* * Given a NIC memory source address and a host memory destination address, * copy 'amount' from NIC to host using programmed i/o. The 'amount' is * rounded up to a word - ok as long as mbufs are word sized. */ void mx98905_readmem(bus_space_tag_t nict, bus_space_handle_t nich, bus_space_tag_t asict, bus_space_handle_t asich, int src, u_int8_t *dst, size_t amount, int useword) { int len, resid; resid = amount; /* Round up to a word. */ if (resid & 1) ++resid; while (resid > 0) { len = uimin(resid, 254); mx98905_read_setup(nict, nich, len, src); if (useword) bus_space_read_multi_stream_2(asict, asich, NE2000_ASIC_DATA, (u_int16_t *)dst, len >> 1); else bus_space_read_multi_1(asict, asich, NE2000_ASIC_DATA, dst, len); resid -= len; src += len; dst += len; } }