ad5a172c99
Pointed out by jmcneill; other instances found by grep -iE 'rx.*tx|tx.*rx'
1773 lines
47 KiB
C
1773 lines
47 KiB
C
/*-
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* Copyright (c) 2013 Ian Lepore <ian@freebsd.org>
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* All rights reserved.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution.
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*
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* THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
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* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
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* ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
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* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
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* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
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* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
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* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
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* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
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* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
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* SUCH DAMAGE.
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*
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*/
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#include <sys/cdefs.h>
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__FBSDID("$FreeBSD$");
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/*
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* Driver for Freescale Fast Ethernet Controller, found on imx-series SoCs among
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* others. Also works for the ENET Gigibit controller found on imx6 and imx28,
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* but the driver doesn't currently use any of the ENET advanced features other
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* than enabling gigabit.
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*
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* The interface name 'fec' is already taken by netgraph's Fast Etherchannel
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* (netgraph/ng_fec.c), so we use 'ffec'.
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*
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* Requires an FDT entry with at least these properties:
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* fec: ethernet@02188000 {
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* compatible = "fsl,imxNN-fec";
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* reg = <0x02188000 0x4000>;
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* interrupts = <150 151>;
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* phy-mode = "rgmii";
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* phy-disable-preamble; // optional
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* };
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* The second interrupt number is for IEEE-1588, and is not currently used; it
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* need not be present. phy-mode must be one of: "mii", "rmii", "rgmii".
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* There is also an optional property, phy-disable-preamble, which if present
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* will disable the preamble bits, cutting the size of each mdio transaction
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* (and thus the busy-wait time) in half.
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*/
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#include <sys/param.h>
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#include <sys/systm.h>
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#include <sys/bus.h>
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#include <sys/endian.h>
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#include <sys/kernel.h>
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#include <sys/lock.h>
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#include <sys/malloc.h>
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#include <sys/mbuf.h>
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#include <sys/module.h>
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#include <sys/mutex.h>
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#include <sys/rman.h>
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#include <sys/socket.h>
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#include <sys/sockio.h>
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#include <sys/sysctl.h>
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#include <machine/bus.h>
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#include <net/bpf.h>
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#include <net/if.h>
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#include <net/ethernet.h>
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#include <net/if_dl.h>
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#include <net/if_media.h>
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#include <net/if_types.h>
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#include <net/if_var.h>
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#include <net/if_vlan_var.h>
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#include <dev/ffec/if_ffecreg.h>
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#include <dev/ofw/ofw_bus.h>
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#include <dev/ofw/ofw_bus_subr.h>
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#include <dev/mii/mii.h>
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#include <dev/mii/miivar.h>
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#include "miibus_if.h"
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/*
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* There are small differences in the hardware on various SoCs. Not every SoC
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* we support has its own FECTYPE; most work as GENERIC and only the ones that
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* need different handling get their own entry. In addition to the types in
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* this list, there are some flags below that can be ORed into the upper bits.
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*/
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enum {
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FECTYPE_NONE,
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FECTYPE_GENERIC,
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FECTYPE_IMX53,
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FECTYPE_IMX6,
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FECTYPE_MVF,
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};
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/*
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* Flags that describe general differences between the FEC hardware in various
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* SoCs. These are ORed into the FECTYPE enum values.
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*/
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#define FECTYPE_MASK 0x0000ffff
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#define FECFLAG_GBE (0x0001 << 16)
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/*
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* Table of supported FDT compat strings and their associated FECTYPE values.
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*/
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static struct ofw_compat_data compat_data[] = {
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{"fsl,imx51-fec", FECTYPE_GENERIC},
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{"fsl,imx53-fec", FECTYPE_IMX53},
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{"fsl,imx6q-fec", FECTYPE_IMX6 | FECFLAG_GBE},
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{"fsl,mvf600-fec", FECTYPE_MVF},
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{"fsl,mvf-fec", FECTYPE_MVF},
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{NULL, FECTYPE_NONE},
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};
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/*
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* Driver data and defines.
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*/
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#define RX_DESC_COUNT 64
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#define RX_DESC_SIZE (sizeof(struct ffec_hwdesc) * RX_DESC_COUNT)
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#define TX_DESC_COUNT 64
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#define TX_DESC_SIZE (sizeof(struct ffec_hwdesc) * TX_DESC_COUNT)
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#define WATCHDOG_TIMEOUT_SECS 5
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#define STATS_HARVEST_INTERVAL 3
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struct ffec_bufmap {
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struct mbuf *mbuf;
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bus_dmamap_t map;
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};
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enum {
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PHY_CONN_UNKNOWN,
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PHY_CONN_MII,
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PHY_CONN_RMII,
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PHY_CONN_RGMII
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};
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struct ffec_softc {
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device_t dev;
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device_t miibus;
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struct mii_data * mii_softc;
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struct ifnet *ifp;
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int if_flags;
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struct mtx mtx;
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struct resource *irq_res;
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struct resource *mem_res;
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void * intr_cookie;
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struct callout ffec_callout;
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uint8_t phy_conn_type;
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uint8_t fectype;
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boolean_t link_is_up;
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boolean_t is_attached;
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boolean_t is_detaching;
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int tx_watchdog_count;
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int stats_harvest_count;
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bus_dma_tag_t rxdesc_tag;
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bus_dmamap_t rxdesc_map;
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struct ffec_hwdesc *rxdesc_ring;
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bus_addr_t rxdesc_ring_paddr;
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bus_dma_tag_t rxbuf_tag;
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struct ffec_bufmap rxbuf_map[RX_DESC_COUNT];
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uint32_t rx_idx;
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bus_dma_tag_t txdesc_tag;
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bus_dmamap_t txdesc_map;
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struct ffec_hwdesc *txdesc_ring;
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bus_addr_t txdesc_ring_paddr;
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bus_dma_tag_t txbuf_tag;
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struct ffec_bufmap txbuf_map[TX_DESC_COUNT];
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uint32_t tx_idx_head;
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uint32_t tx_idx_tail;
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int txcount;
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};
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#define FFEC_LOCK(sc) mtx_lock(&(sc)->mtx)
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#define FFEC_UNLOCK(sc) mtx_unlock(&(sc)->mtx)
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#define FFEC_LOCK_INIT(sc) mtx_init(&(sc)->mtx, \
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device_get_nameunit((sc)->dev), MTX_NETWORK_LOCK, MTX_DEF)
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#define FFEC_LOCK_DESTROY(sc) mtx_destroy(&(sc)->mtx);
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#define FFEC_ASSERT_LOCKED(sc) mtx_assert(&(sc)->mtx, MA_OWNED);
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#define FFEC_ASSERT_UNLOCKED(sc) mtx_assert(&(sc)->mtx, MA_NOTOWNED);
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static void ffec_init_locked(struct ffec_softc *sc);
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static void ffec_stop_locked(struct ffec_softc *sc);
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static void ffec_txstart_locked(struct ffec_softc *sc);
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static void ffec_txfinish_locked(struct ffec_softc *sc);
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static inline uint16_t
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RD2(struct ffec_softc *sc, bus_size_t off)
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{
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return (bus_read_2(sc->mem_res, off));
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}
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static inline void
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WR2(struct ffec_softc *sc, bus_size_t off, uint16_t val)
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{
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bus_write_2(sc->mem_res, off, val);
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}
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static inline uint32_t
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RD4(struct ffec_softc *sc, bus_size_t off)
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{
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return (bus_read_4(sc->mem_res, off));
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}
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static inline void
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WR4(struct ffec_softc *sc, bus_size_t off, uint32_t val)
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{
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bus_write_4(sc->mem_res, off, val);
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}
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static inline uint32_t
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next_rxidx(struct ffec_softc *sc, uint32_t curidx)
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{
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return ((curidx == RX_DESC_COUNT - 1) ? 0 : curidx + 1);
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}
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static inline uint32_t
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next_txidx(struct ffec_softc *sc, uint32_t curidx)
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{
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return ((curidx == TX_DESC_COUNT - 1) ? 0 : curidx + 1);
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}
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static void
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ffec_get1paddr(void *arg, bus_dma_segment_t *segs, int nsegs, int error)
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{
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if (error != 0)
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return;
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*(bus_addr_t *)arg = segs[0].ds_addr;
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}
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static void
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ffec_miigasket_setup(struct ffec_softc *sc)
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{
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uint32_t ifmode;
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/*
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* We only need the gasket for MII and RMII connections on certain SoCs.
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*/
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switch (sc->fectype & FECTYPE_MASK)
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{
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case FECTYPE_IMX53:
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break;
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default:
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return;
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}
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switch (sc->phy_conn_type)
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{
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case PHY_CONN_MII:
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ifmode = 0;
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break;
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case PHY_CONN_RMII:
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ifmode = FEC_MIIGSK_CFGR_IF_MODE_RMII;
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break;
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default:
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return;
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}
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/*
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* Disable the gasket, configure for either MII or RMII, then enable.
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*/
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WR2(sc, FEC_MIIGSK_ENR, 0);
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while (RD2(sc, FEC_MIIGSK_ENR) & FEC_MIIGSK_ENR_READY)
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continue;
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WR2(sc, FEC_MIIGSK_CFGR, ifmode);
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WR2(sc, FEC_MIIGSK_ENR, FEC_MIIGSK_ENR_EN);
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while (!(RD2(sc, FEC_MIIGSK_ENR) & FEC_MIIGSK_ENR_READY))
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continue;
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}
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static boolean_t
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ffec_miibus_iowait(struct ffec_softc *sc)
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{
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uint32_t timeout;
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for (timeout = 10000; timeout != 0; --timeout)
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if (RD4(sc, FEC_IER_REG) & FEC_IER_MII)
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return (true);
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return (false);
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}
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static int
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ffec_miibus_readreg(device_t dev, int phy, int reg)
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{
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struct ffec_softc *sc;
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int val;
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sc = device_get_softc(dev);
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WR4(sc, FEC_IER_REG, FEC_IER_MII);
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WR4(sc, FEC_MMFR_REG, FEC_MMFR_OP_READ |
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FEC_MMFR_ST_VALUE | FEC_MMFR_TA_VALUE |
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((phy << FEC_MMFR_PA_SHIFT) & FEC_MMFR_PA_MASK) |
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((reg << FEC_MMFR_RA_SHIFT) & FEC_MMFR_RA_MASK));
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if (!ffec_miibus_iowait(sc)) {
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device_printf(dev, "timeout waiting for mii read\n");
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return (-1); /* All-ones is a symptom of bad mdio. */
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}
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val = RD4(sc, FEC_MMFR_REG) & FEC_MMFR_DATA_MASK;
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return (val);
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}
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static int
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ffec_miibus_writereg(device_t dev, int phy, int reg, int val)
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{
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struct ffec_softc *sc;
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sc = device_get_softc(dev);
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WR4(sc, FEC_IER_REG, FEC_IER_MII);
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WR4(sc, FEC_MMFR_REG, FEC_MMFR_OP_WRITE |
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FEC_MMFR_ST_VALUE | FEC_MMFR_TA_VALUE |
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((phy << FEC_MMFR_PA_SHIFT) & FEC_MMFR_PA_MASK) |
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((reg << FEC_MMFR_RA_SHIFT) & FEC_MMFR_RA_MASK) |
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(val & FEC_MMFR_DATA_MASK));
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if (!ffec_miibus_iowait(sc)) {
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device_printf(dev, "timeout waiting for mii write\n");
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return (-1);
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}
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return (0);
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}
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static void
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ffec_miibus_statchg(device_t dev)
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{
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struct ffec_softc *sc;
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struct mii_data *mii;
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uint32_t ecr, rcr, tcr;
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/*
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* Called by the MII bus driver when the PHY establishes link to set the
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* MAC interface registers.
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*/
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sc = device_get_softc(dev);
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FFEC_ASSERT_LOCKED(sc);
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mii = sc->mii_softc;
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if (mii->mii_media_status & IFM_ACTIVE)
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sc->link_is_up = true;
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else
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sc->link_is_up = false;
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ecr = RD4(sc, FEC_ECR_REG) & ~FEC_ECR_SPEED;
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rcr = RD4(sc, FEC_RCR_REG) & ~(FEC_RCR_RMII_10T | FEC_RCR_RMII_MODE |
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FEC_RCR_RGMII_EN | FEC_RCR_DRT | FEC_RCR_FCE);
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tcr = RD4(sc, FEC_TCR_REG) & ~FEC_TCR_FDEN;
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rcr |= FEC_RCR_MII_MODE; /* Must always be on even for R[G]MII. */
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switch (sc->phy_conn_type) {
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case PHY_CONN_MII:
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break;
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case PHY_CONN_RMII:
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rcr |= FEC_RCR_RMII_MODE;
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break;
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case PHY_CONN_RGMII:
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rcr |= FEC_RCR_RGMII_EN;
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break;
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}
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switch (IFM_SUBTYPE(mii->mii_media_active)) {
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case IFM_1000_T:
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case IFM_1000_SX:
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ecr |= FEC_ECR_SPEED;
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break;
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case IFM_100_TX:
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/* Not-FEC_ECR_SPEED + not-FEC_RCR_RMII_10T means 100TX */
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break;
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case IFM_10_T:
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rcr |= FEC_RCR_RMII_10T;
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break;
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case IFM_NONE:
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sc->link_is_up = false;
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return;
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default:
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sc->link_is_up = false;
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device_printf(dev, "Unsupported media %u\n",
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IFM_SUBTYPE(mii->mii_media_active));
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return;
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}
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if ((IFM_OPTIONS(mii->mii_media_active) & IFM_FDX) != 0)
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tcr |= FEC_TCR_FDEN;
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else
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rcr |= FEC_RCR_DRT;
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if ((IFM_OPTIONS(mii->mii_media_active) & IFM_FLOW) != 0)
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rcr |= FEC_RCR_FCE;
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WR4(sc, FEC_RCR_REG, rcr);
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WR4(sc, FEC_TCR_REG, tcr);
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WR4(sc, FEC_ECR_REG, ecr);
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}
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static void
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ffec_media_status(struct ifnet * ifp, struct ifmediareq *ifmr)
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{
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struct ffec_softc *sc;
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struct mii_data *mii;
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sc = ifp->if_softc;
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mii = sc->mii_softc;
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FFEC_LOCK(sc);
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mii_pollstat(mii);
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ifmr->ifm_active = mii->mii_media_active;
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ifmr->ifm_status = mii->mii_media_status;
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FFEC_UNLOCK(sc);
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}
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static int
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ffec_media_change_locked(struct ffec_softc *sc)
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{
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return (mii_mediachg(sc->mii_softc));
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}
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static int
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ffec_media_change(struct ifnet * ifp)
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{
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struct ffec_softc *sc;
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int error;
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sc = ifp->if_softc;
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FFEC_LOCK(sc);
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error = ffec_media_change_locked(sc);
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FFEC_UNLOCK(sc);
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return (error);
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}
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static void ffec_clear_stats(struct ffec_softc *sc)
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{
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WR4(sc, FEC_RMON_R_PACKETS, 0);
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WR4(sc, FEC_RMON_R_MC_PKT, 0);
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WR4(sc, FEC_RMON_R_CRC_ALIGN, 0);
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WR4(sc, FEC_RMON_R_UNDERSIZE, 0);
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WR4(sc, FEC_RMON_R_OVERSIZE, 0);
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WR4(sc, FEC_RMON_R_FRAG, 0);
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WR4(sc, FEC_RMON_R_JAB, 0);
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WR4(sc, FEC_RMON_T_PACKETS, 0);
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WR4(sc, FEC_RMON_T_MC_PKT, 0);
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WR4(sc, FEC_RMON_T_CRC_ALIGN, 0);
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WR4(sc, FEC_RMON_T_UNDERSIZE, 0);
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WR4(sc, FEC_RMON_T_OVERSIZE , 0);
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WR4(sc, FEC_RMON_T_FRAG, 0);
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WR4(sc, FEC_RMON_T_JAB, 0);
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WR4(sc, FEC_RMON_T_COL, 0);
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}
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static void
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ffec_harvest_stats(struct ffec_softc *sc)
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{
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struct ifnet *ifp;
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|
|
/* We don't need to harvest too often. */
|
|
if (++sc->stats_harvest_count < STATS_HARVEST_INTERVAL)
|
|
return;
|
|
|
|
/*
|
|
* Try to avoid harvesting unless the IDLE flag is on, but if it has
|
|
* been too long just go ahead and do it anyway, the worst that'll
|
|
* happen is we'll lose a packet count or two as we clear at the end.
|
|
*/
|
|
if (sc->stats_harvest_count < (2 * STATS_HARVEST_INTERVAL) &&
|
|
((RD4(sc, FEC_MIBC_REG) & FEC_MIBC_IDLE) == 0))
|
|
return;
|
|
|
|
sc->stats_harvest_count = 0;
|
|
ifp = sc->ifp;
|
|
|
|
if_inc_counter(ifp, IFCOUNTER_IPACKETS, RD4(sc, FEC_RMON_R_PACKETS));
|
|
if_inc_counter(ifp, IFCOUNTER_IMCASTS, RD4(sc, FEC_RMON_R_MC_PKT));
|
|
if_inc_counter(ifp, IFCOUNTER_IERRORS,
|
|
RD4(sc, FEC_RMON_R_CRC_ALIGN) + RD4(sc, FEC_RMON_R_UNDERSIZE) +
|
|
RD4(sc, FEC_RMON_R_OVERSIZE) + RD4(sc, FEC_RMON_R_FRAG) +
|
|
RD4(sc, FEC_RMON_R_JAB));
|
|
|
|
if_inc_counter(ifp, IFCOUNTER_OPACKETS, RD4(sc, FEC_RMON_T_PACKETS));
|
|
if_inc_counter(ifp, IFCOUNTER_OMCASTS, RD4(sc, FEC_RMON_T_MC_PKT));
|
|
if_inc_counter(ifp, IFCOUNTER_OERRORS,
|
|
RD4(sc, FEC_RMON_T_CRC_ALIGN) + RD4(sc, FEC_RMON_T_UNDERSIZE) +
|
|
RD4(sc, FEC_RMON_T_OVERSIZE) + RD4(sc, FEC_RMON_T_FRAG) +
|
|
RD4(sc, FEC_RMON_T_JAB));
|
|
|
|
if_inc_counter(ifp, IFCOUNTER_COLLISIONS, RD4(sc, FEC_RMON_T_COL));
|
|
|
|
ffec_clear_stats(sc);
|
|
}
|
|
|
|
static void
|
|
ffec_tick(void *arg)
|
|
{
|
|
struct ffec_softc *sc;
|
|
struct ifnet *ifp;
|
|
int link_was_up;
|
|
|
|
sc = arg;
|
|
|
|
FFEC_ASSERT_LOCKED(sc);
|
|
|
|
ifp = sc->ifp;
|
|
|
|
if (!(ifp->if_drv_flags & IFF_DRV_RUNNING))
|
|
return;
|
|
|
|
/*
|
|
* Typical tx watchdog. If this fires it indicates that we enqueued
|
|
* packets for output and never got a txdone interrupt for them. Maybe
|
|
* it's a missed interrupt somehow, just pretend we got one.
|
|
*/
|
|
if (sc->tx_watchdog_count > 0) {
|
|
if (--sc->tx_watchdog_count == 0) {
|
|
ffec_txfinish_locked(sc);
|
|
}
|
|
}
|
|
|
|
/* Gather stats from hardware counters. */
|
|
ffec_harvest_stats(sc);
|
|
|
|
/* Check the media status. */
|
|
link_was_up = sc->link_is_up;
|
|
mii_tick(sc->mii_softc);
|
|
if (sc->link_is_up && !link_was_up)
|
|
ffec_txstart_locked(sc);
|
|
|
|
/* Schedule another check one second from now. */
|
|
callout_reset(&sc->ffec_callout, hz, ffec_tick, sc);
|
|
}
|
|
|
|
inline static uint32_t
|
|
ffec_setup_txdesc(struct ffec_softc *sc, int idx, bus_addr_t paddr,
|
|
uint32_t len)
|
|
{
|
|
uint32_t nidx;
|
|
uint32_t flags;
|
|
|
|
nidx = next_txidx(sc, idx);
|
|
|
|
/* Addr/len 0 means we're clearing the descriptor after xmit done. */
|
|
if (paddr == 0 || len == 0) {
|
|
flags = 0;
|
|
--sc->txcount;
|
|
} else {
|
|
flags = FEC_TXDESC_READY | FEC_TXDESC_L | FEC_TXDESC_TC;
|
|
++sc->txcount;
|
|
}
|
|
if (nidx == 0)
|
|
flags |= FEC_TXDESC_WRAP;
|
|
|
|
/*
|
|
* The hardware requires 32-bit physical addresses. We set up the dma
|
|
* tag to indicate that, so the cast to uint32_t should never lose
|
|
* significant bits.
|
|
*/
|
|
sc->txdesc_ring[idx].buf_paddr = (uint32_t)paddr;
|
|
sc->txdesc_ring[idx].flags_len = flags | len; /* Must be set last! */
|
|
|
|
return (nidx);
|
|
}
|
|
|
|
static int
|
|
ffec_setup_txbuf(struct ffec_softc *sc, int idx, struct mbuf **mp)
|
|
{
|
|
struct mbuf * m;
|
|
int error, nsegs;
|
|
struct bus_dma_segment seg;
|
|
|
|
if ((m = m_defrag(*mp, M_NOWAIT)) == NULL)
|
|
return (ENOMEM);
|
|
*mp = m;
|
|
|
|
error = bus_dmamap_load_mbuf_sg(sc->txbuf_tag, sc->txbuf_map[idx].map,
|
|
m, &seg, &nsegs, 0);
|
|
if (error != 0) {
|
|
return (ENOMEM);
|
|
}
|
|
bus_dmamap_sync(sc->txbuf_tag, sc->txbuf_map[idx].map,
|
|
BUS_DMASYNC_PREWRITE);
|
|
|
|
sc->txbuf_map[idx].mbuf = m;
|
|
ffec_setup_txdesc(sc, idx, seg.ds_addr, seg.ds_len);
|
|
|
|
return (0);
|
|
|
|
}
|
|
|
|
static void
|
|
ffec_txstart_locked(struct ffec_softc *sc)
|
|
{
|
|
struct ifnet *ifp;
|
|
struct mbuf *m;
|
|
int enqueued;
|
|
|
|
FFEC_ASSERT_LOCKED(sc);
|
|
|
|
if (!sc->link_is_up)
|
|
return;
|
|
|
|
ifp = sc->ifp;
|
|
|
|
if (ifp->if_drv_flags & IFF_DRV_OACTIVE)
|
|
return;
|
|
|
|
enqueued = 0;
|
|
|
|
for (;;) {
|
|
if (sc->txcount == (TX_DESC_COUNT-1)) {
|
|
ifp->if_drv_flags |= IFF_DRV_OACTIVE;
|
|
break;
|
|
}
|
|
IFQ_DRV_DEQUEUE(&ifp->if_snd, m);
|
|
if (m == NULL)
|
|
break;
|
|
if (ffec_setup_txbuf(sc, sc->tx_idx_head, &m) != 0) {
|
|
IFQ_DRV_PREPEND(&ifp->if_snd, m);
|
|
break;
|
|
}
|
|
BPF_MTAP(ifp, m);
|
|
sc->tx_idx_head = next_txidx(sc, sc->tx_idx_head);
|
|
++enqueued;
|
|
}
|
|
|
|
if (enqueued != 0) {
|
|
bus_dmamap_sync(sc->txdesc_tag, sc->txdesc_map, BUS_DMASYNC_PREWRITE);
|
|
WR4(sc, FEC_TDAR_REG, FEC_TDAR_TDAR);
|
|
bus_dmamap_sync(sc->txdesc_tag, sc->txdesc_map, BUS_DMASYNC_POSTWRITE);
|
|
sc->tx_watchdog_count = WATCHDOG_TIMEOUT_SECS;
|
|
}
|
|
}
|
|
|
|
static void
|
|
ffec_txstart(struct ifnet *ifp)
|
|
{
|
|
struct ffec_softc *sc = ifp->if_softc;
|
|
|
|
FFEC_LOCK(sc);
|
|
ffec_txstart_locked(sc);
|
|
FFEC_UNLOCK(sc);
|
|
}
|
|
|
|
static void
|
|
ffec_txfinish_locked(struct ffec_softc *sc)
|
|
{
|
|
struct ifnet *ifp;
|
|
struct ffec_hwdesc *desc;
|
|
struct ffec_bufmap *bmap;
|
|
boolean_t retired_buffer;
|
|
|
|
FFEC_ASSERT_LOCKED(sc);
|
|
|
|
/* XXX Can't set PRE|POST right now, but we need both. */
|
|
bus_dmamap_sync(sc->txdesc_tag, sc->txdesc_map, BUS_DMASYNC_PREREAD);
|
|
bus_dmamap_sync(sc->txdesc_tag, sc->txdesc_map, BUS_DMASYNC_POSTREAD);
|
|
ifp = sc->ifp;
|
|
retired_buffer = false;
|
|
while (sc->tx_idx_tail != sc->tx_idx_head) {
|
|
desc = &sc->txdesc_ring[sc->tx_idx_tail];
|
|
if (desc->flags_len & FEC_TXDESC_READY)
|
|
break;
|
|
retired_buffer = true;
|
|
bmap = &sc->txbuf_map[sc->tx_idx_tail];
|
|
bus_dmamap_sync(sc->txbuf_tag, bmap->map,
|
|
BUS_DMASYNC_POSTWRITE);
|
|
bus_dmamap_unload(sc->txbuf_tag, bmap->map);
|
|
m_freem(bmap->mbuf);
|
|
bmap->mbuf = NULL;
|
|
ffec_setup_txdesc(sc, sc->tx_idx_tail, 0, 0);
|
|
sc->tx_idx_tail = next_txidx(sc, sc->tx_idx_tail);
|
|
}
|
|
|
|
/*
|
|
* If we retired any buffers, there will be open tx slots available in
|
|
* the descriptor ring, go try to start some new output.
|
|
*/
|
|
if (retired_buffer) {
|
|
ifp->if_drv_flags &= ~IFF_DRV_OACTIVE;
|
|
ffec_txstart_locked(sc);
|
|
}
|
|
|
|
/* If there are no buffers outstanding, muzzle the watchdog. */
|
|
if (sc->tx_idx_tail == sc->tx_idx_head) {
|
|
sc->tx_watchdog_count = 0;
|
|
}
|
|
}
|
|
|
|
inline static uint32_t
|
|
ffec_setup_rxdesc(struct ffec_softc *sc, int idx, bus_addr_t paddr)
|
|
{
|
|
uint32_t nidx;
|
|
|
|
/*
|
|
* The hardware requires 32-bit physical addresses. We set up the dma
|
|
* tag to indicate that, so the cast to uint32_t should never lose
|
|
* significant bits.
|
|
*/
|
|
nidx = next_rxidx(sc, idx);
|
|
sc->rxdesc_ring[idx].buf_paddr = (uint32_t)paddr;
|
|
sc->rxdesc_ring[idx].flags_len = FEC_RXDESC_EMPTY |
|
|
((nidx == 0) ? FEC_RXDESC_WRAP : 0);
|
|
|
|
return (nidx);
|
|
}
|
|
|
|
static int
|
|
ffec_setup_rxbuf(struct ffec_softc *sc, int idx, struct mbuf * m)
|
|
{
|
|
int error, nsegs;
|
|
struct bus_dma_segment seg;
|
|
|
|
/*
|
|
* We need to leave at least ETHER_ALIGN bytes free at the beginning of
|
|
* the buffer to allow the data to be re-aligned after receiving it (by
|
|
* copying it backwards ETHER_ALIGN bytes in the same buffer). We also
|
|
* have to ensure that the beginning of the buffer is aligned to the
|
|
* hardware's requirements.
|
|
*/
|
|
m_adj(m, roundup(ETHER_ALIGN, FEC_RXBUF_ALIGN));
|
|
|
|
error = bus_dmamap_load_mbuf_sg(sc->rxbuf_tag, sc->rxbuf_map[idx].map,
|
|
m, &seg, &nsegs, 0);
|
|
if (error != 0) {
|
|
return (error);
|
|
}
|
|
|
|
bus_dmamap_sync(sc->rxbuf_tag, sc->rxbuf_map[idx].map,
|
|
BUS_DMASYNC_PREREAD);
|
|
|
|
sc->rxbuf_map[idx].mbuf = m;
|
|
ffec_setup_rxdesc(sc, idx, seg.ds_addr);
|
|
|
|
return (0);
|
|
}
|
|
|
|
static struct mbuf *
|
|
ffec_alloc_mbufcl(struct ffec_softc *sc)
|
|
{
|
|
struct mbuf *m;
|
|
|
|
m = m_getcl(M_NOWAIT, MT_DATA, M_PKTHDR);
|
|
m->m_pkthdr.len = m->m_len = m->m_ext.ext_size;
|
|
|
|
return (m);
|
|
}
|
|
|
|
static void
|
|
ffec_rxfinish_onebuf(struct ffec_softc *sc, int len)
|
|
{
|
|
struct mbuf *m, *newmbuf;
|
|
struct ffec_bufmap *bmap;
|
|
uint8_t *dst, *src;
|
|
int error;
|
|
|
|
/*
|
|
* First try to get a new mbuf to plug into this slot in the rx ring.
|
|
* If that fails, drop the current packet and recycle the current
|
|
* mbuf, which is still mapped and loaded.
|
|
*/
|
|
if ((newmbuf = ffec_alloc_mbufcl(sc)) == NULL) {
|
|
if_inc_counter(sc->ifp, IFCOUNTER_IQDROPS, 1);
|
|
ffec_setup_rxdesc(sc, sc->rx_idx,
|
|
sc->rxdesc_ring[sc->rx_idx].buf_paddr);
|
|
return;
|
|
}
|
|
|
|
/*
|
|
* Unfortunately, the protocol headers need to be aligned on a 32-bit
|
|
* boundary for the upper layers. The hardware requires receive
|
|
* buffers to be 16-byte aligned. The ethernet header is 14 bytes,
|
|
* leaving the protocol header unaligned. We used m_adj() after
|
|
* allocating the buffer to leave empty space at the start of the
|
|
* buffer, now we'll use the alignment agnostic bcopy() routine to
|
|
* shuffle all the data backwards 2 bytes and adjust m_data.
|
|
*
|
|
* XXX imx6 hardware is able to do this 2-byte alignment by setting the
|
|
* SHIFT16 bit in the RACC register. Older hardware doesn't have that
|
|
* feature, but for them could we speed this up by copying just the
|
|
* protocol headers into their own small mbuf then chaining the cluster
|
|
* to it? That way we'd only need to copy like 64 bytes or whatever
|
|
* the biggest header is, instead of the whole 1530ish-byte frame.
|
|
*/
|
|
|
|
FFEC_UNLOCK(sc);
|
|
|
|
bmap = &sc->rxbuf_map[sc->rx_idx];
|
|
len -= ETHER_CRC_LEN;
|
|
bus_dmamap_sync(sc->rxbuf_tag, bmap->map, BUS_DMASYNC_POSTREAD);
|
|
bus_dmamap_unload(sc->rxbuf_tag, bmap->map);
|
|
m = bmap->mbuf;
|
|
bmap->mbuf = NULL;
|
|
m->m_len = len;
|
|
m->m_pkthdr.len = len;
|
|
m->m_pkthdr.rcvif = sc->ifp;
|
|
|
|
src = mtod(m, uint8_t*);
|
|
dst = src - ETHER_ALIGN;
|
|
bcopy(src, dst, len);
|
|
m->m_data = dst;
|
|
sc->ifp->if_input(sc->ifp, m);
|
|
|
|
FFEC_LOCK(sc);
|
|
|
|
if ((error = ffec_setup_rxbuf(sc, sc->rx_idx, newmbuf)) != 0) {
|
|
device_printf(sc->dev, "ffec_setup_rxbuf error %d\n", error);
|
|
/* XXX Now what? We've got a hole in the rx ring. */
|
|
}
|
|
|
|
}
|
|
|
|
static void
|
|
ffec_rxfinish_locked(struct ffec_softc *sc)
|
|
{
|
|
struct ffec_hwdesc *desc;
|
|
int len;
|
|
boolean_t produced_empty_buffer;
|
|
|
|
FFEC_ASSERT_LOCKED(sc);
|
|
|
|
/* XXX Can't set PRE|POST right now, but we need both. */
|
|
bus_dmamap_sync(sc->rxdesc_tag, sc->rxdesc_map, BUS_DMASYNC_PREREAD);
|
|
bus_dmamap_sync(sc->rxdesc_tag, sc->rxdesc_map, BUS_DMASYNC_POSTREAD);
|
|
produced_empty_buffer = false;
|
|
for (;;) {
|
|
desc = &sc->rxdesc_ring[sc->rx_idx];
|
|
if (desc->flags_len & FEC_RXDESC_EMPTY)
|
|
break;
|
|
produced_empty_buffer = true;
|
|
len = (desc->flags_len & FEC_RXDESC_LEN_MASK);
|
|
if (len < 64) {
|
|
/*
|
|
* Just recycle the descriptor and continue. .
|
|
*/
|
|
ffec_setup_rxdesc(sc, sc->rx_idx,
|
|
sc->rxdesc_ring[sc->rx_idx].buf_paddr);
|
|
} else if ((desc->flags_len & FEC_RXDESC_L) == 0) {
|
|
/*
|
|
* The entire frame is not in this buffer. Impossible.
|
|
* Recycle the descriptor and continue.
|
|
*
|
|
* XXX what's the right way to handle this? Probably we
|
|
* should stop/init the hardware because this should
|
|
* just really never happen when we have buffers bigger
|
|
* than the maximum frame size.
|
|
*/
|
|
device_printf(sc->dev,
|
|
"fec_rxfinish: received frame without LAST bit set");
|
|
ffec_setup_rxdesc(sc, sc->rx_idx,
|
|
sc->rxdesc_ring[sc->rx_idx].buf_paddr);
|
|
} else if (desc->flags_len & FEC_RXDESC_ERROR_BITS) {
|
|
/*
|
|
* Something went wrong with receiving the frame, we
|
|
* don't care what (the hardware has counted the error
|
|
* in the stats registers already), we just reuse the
|
|
* same mbuf, which is still dma-mapped, by resetting
|
|
* the rx descriptor.
|
|
*/
|
|
ffec_setup_rxdesc(sc, sc->rx_idx,
|
|
sc->rxdesc_ring[sc->rx_idx].buf_paddr);
|
|
} else {
|
|
/*
|
|
* Normal case: a good frame all in one buffer.
|
|
*/
|
|
ffec_rxfinish_onebuf(sc, len);
|
|
}
|
|
sc->rx_idx = next_rxidx(sc, sc->rx_idx);
|
|
}
|
|
|
|
if (produced_empty_buffer) {
|
|
bus_dmamap_sync(sc->rxdesc_tag, sc->rxdesc_map, BUS_DMASYNC_PREWRITE);
|
|
WR4(sc, FEC_RDAR_REG, FEC_RDAR_RDAR);
|
|
bus_dmamap_sync(sc->rxdesc_tag, sc->rxdesc_map, BUS_DMASYNC_POSTWRITE);
|
|
}
|
|
}
|
|
|
|
static void
|
|
ffec_get_hwaddr(struct ffec_softc *sc, uint8_t *hwaddr)
|
|
{
|
|
uint32_t palr, paur, rnd;
|
|
|
|
/*
|
|
* Try to recover a MAC address from the running hardware. If there's
|
|
* something non-zero there, assume the bootloader did the right thing
|
|
* and just use it.
|
|
*
|
|
* Otherwise, set the address to a convenient locally assigned address,
|
|
* 'bsd' + random 24 low-order bits. 'b' is 0x62, which has the locally
|
|
* assigned bit set, and the broadcast/multicast bit clear.
|
|
*/
|
|
palr = RD4(sc, FEC_PALR_REG);
|
|
paur = RD4(sc, FEC_PAUR_REG) & FEC_PAUR_PADDR2_MASK;
|
|
if ((palr | paur) != 0) {
|
|
hwaddr[0] = palr >> 24;
|
|
hwaddr[1] = palr >> 16;
|
|
hwaddr[2] = palr >> 8;
|
|
hwaddr[3] = palr >> 0;
|
|
hwaddr[4] = paur >> 24;
|
|
hwaddr[5] = paur >> 16;
|
|
} else {
|
|
rnd = arc4random() & 0x00ffffff;
|
|
hwaddr[0] = 'b';
|
|
hwaddr[1] = 's';
|
|
hwaddr[2] = 'd';
|
|
hwaddr[3] = rnd >> 16;
|
|
hwaddr[4] = rnd >> 8;
|
|
hwaddr[5] = rnd >> 0;
|
|
}
|
|
|
|
if (bootverbose) {
|
|
device_printf(sc->dev,
|
|
"MAC address %02x:%02x:%02x:%02x:%02x:%02x:\n",
|
|
hwaddr[0], hwaddr[1], hwaddr[2],
|
|
hwaddr[3], hwaddr[4], hwaddr[5]);
|
|
}
|
|
}
|
|
|
|
static void
|
|
ffec_setup_rxfilter(struct ffec_softc *sc)
|
|
{
|
|
struct ifnet *ifp;
|
|
struct ifmultiaddr *ifma;
|
|
uint8_t *eaddr;
|
|
uint32_t crc;
|
|
uint64_t ghash, ihash;
|
|
|
|
FFEC_ASSERT_LOCKED(sc);
|
|
|
|
ifp = sc->ifp;
|
|
|
|
/*
|
|
* Set the multicast (group) filter hash.
|
|
*/
|
|
if ((ifp->if_flags & IFF_ALLMULTI))
|
|
ghash = 0xffffffffffffffffLLU;
|
|
else {
|
|
ghash = 0;
|
|
if_maddr_rlock(ifp);
|
|
TAILQ_FOREACH(ifma, &sc->ifp->if_multiaddrs, ifma_link) {
|
|
if (ifma->ifma_addr->sa_family != AF_LINK)
|
|
continue;
|
|
/* 6 bits from MSB in LE CRC32 are used for hash. */
|
|
crc = ether_crc32_le(LLADDR((struct sockaddr_dl *)
|
|
ifma->ifma_addr), ETHER_ADDR_LEN);
|
|
ghash |= 1LLU << (((uint8_t *)&crc)[3] >> 2);
|
|
}
|
|
if_maddr_runlock(ifp);
|
|
}
|
|
WR4(sc, FEC_GAUR_REG, (uint32_t)(ghash >> 32));
|
|
WR4(sc, FEC_GALR_REG, (uint32_t)ghash);
|
|
|
|
/*
|
|
* Set the individual address filter hash.
|
|
*
|
|
* XXX Is 0 the right value when promiscuous is off? This hw feature
|
|
* seems to support the concept of MAC address aliases, does such a
|
|
* thing even exist?
|
|
*/
|
|
if ((ifp->if_flags & IFF_PROMISC))
|
|
ihash = 0xffffffffffffffffLLU;
|
|
else {
|
|
ihash = 0;
|
|
}
|
|
WR4(sc, FEC_IAUR_REG, (uint32_t)(ihash >> 32));
|
|
WR4(sc, FEC_IALR_REG, (uint32_t)ihash);
|
|
|
|
/*
|
|
* Set the primary address.
|
|
*/
|
|
eaddr = IF_LLADDR(ifp);
|
|
WR4(sc, FEC_PALR_REG, (eaddr[0] << 24) | (eaddr[1] << 16) |
|
|
(eaddr[2] << 8) | eaddr[3]);
|
|
WR4(sc, FEC_PAUR_REG, (eaddr[4] << 24) | (eaddr[5] << 16));
|
|
}
|
|
|
|
static void
|
|
ffec_stop_locked(struct ffec_softc *sc)
|
|
{
|
|
struct ifnet *ifp;
|
|
struct ffec_hwdesc *desc;
|
|
struct ffec_bufmap *bmap;
|
|
int idx;
|
|
|
|
FFEC_ASSERT_LOCKED(sc);
|
|
|
|
ifp = sc->ifp;
|
|
ifp->if_drv_flags &= ~(IFF_DRV_RUNNING | IFF_DRV_OACTIVE);
|
|
sc->tx_watchdog_count = 0;
|
|
sc->stats_harvest_count = 0;
|
|
|
|
/*
|
|
* Stop the hardware, mask all interrupts, and clear all current
|
|
* interrupt status bits.
|
|
*/
|
|
WR4(sc, FEC_ECR_REG, RD4(sc, FEC_ECR_REG) & ~FEC_ECR_ETHEREN);
|
|
WR4(sc, FEC_IEM_REG, 0x00000000);
|
|
WR4(sc, FEC_IER_REG, 0xffffffff);
|
|
|
|
/*
|
|
* Stop the media-check callout. Do not use callout_drain() because
|
|
* we're holding a mutex the callout acquires, and if it's currently
|
|
* waiting to acquire it, we'd deadlock. If it is waiting now, the
|
|
* ffec_tick() routine will return without doing anything when it sees
|
|
* that IFF_DRV_RUNNING is not set, so avoiding callout_drain() is safe.
|
|
*/
|
|
callout_stop(&sc->ffec_callout);
|
|
|
|
/*
|
|
* Discard all untransmitted buffers. Each buffer is simply freed;
|
|
* it's as if the bits were transmitted and then lost on the wire.
|
|
*
|
|
* XXX Is this right? Or should we use IFQ_DRV_PREPEND() to put them
|
|
* back on the queue for when we get restarted later?
|
|
*/
|
|
idx = sc->tx_idx_tail;
|
|
while (idx != sc->tx_idx_head) {
|
|
desc = &sc->txdesc_ring[idx];
|
|
bmap = &sc->txbuf_map[idx];
|
|
if (desc->buf_paddr != 0) {
|
|
bus_dmamap_unload(sc->txbuf_tag, bmap->map);
|
|
m_freem(bmap->mbuf);
|
|
bmap->mbuf = NULL;
|
|
ffec_setup_txdesc(sc, idx, 0, 0);
|
|
}
|
|
idx = next_txidx(sc, idx);
|
|
}
|
|
|
|
/*
|
|
* Discard all unprocessed receive buffers. This amounts to just
|
|
* pretending that nothing ever got received into them. We reuse the
|
|
* mbuf already mapped for each desc, simply turning the EMPTY flags
|
|
* back on so they'll get reused when we start up again.
|
|
*/
|
|
for (idx = 0; idx < RX_DESC_COUNT; ++idx) {
|
|
desc = &sc->rxdesc_ring[idx];
|
|
ffec_setup_rxdesc(sc, idx, desc->buf_paddr);
|
|
}
|
|
}
|
|
|
|
static void
|
|
ffec_init_locked(struct ffec_softc *sc)
|
|
{
|
|
struct ifnet *ifp = sc->ifp;
|
|
uint32_t maxbuf, maxfl, regval;
|
|
|
|
FFEC_ASSERT_LOCKED(sc);
|
|
|
|
/*
|
|
* The hardware has a limit of 0x7ff as the max frame length (see
|
|
* comments for MRBR below), and we use mbuf clusters as receive
|
|
* buffers, and we currently are designed to receive an entire frame
|
|
* into a single buffer.
|
|
*
|
|
* We start with a MCLBYTES-sized cluster, but we have to offset into
|
|
* the buffer by ETHER_ALIGN to make room for post-receive re-alignment,
|
|
* and then that value has to be rounded up to the hardware's DMA
|
|
* alignment requirements, so all in all our buffer is that much smaller
|
|
* than MCLBYTES.
|
|
*
|
|
* The resulting value is used as the frame truncation length and the
|
|
* max buffer receive buffer size for now. It'll become more complex
|
|
* when we support jumbo frames and receiving fragments of them into
|
|
* separate buffers.
|
|
*/
|
|
maxbuf = MCLBYTES - roundup(ETHER_ALIGN, FEC_RXBUF_ALIGN);
|
|
maxfl = min(maxbuf, 0x7ff);
|
|
|
|
if (ifp->if_drv_flags & IFF_DRV_RUNNING)
|
|
return;
|
|
|
|
/* Mask all interrupts and clear all current interrupt status bits. */
|
|
WR4(sc, FEC_IEM_REG, 0x00000000);
|
|
WR4(sc, FEC_IER_REG, 0xffffffff);
|
|
|
|
/*
|
|
* Go set up palr/puar, galr/gaur, ialr/iaur.
|
|
*/
|
|
ffec_setup_rxfilter(sc);
|
|
|
|
/*
|
|
* TFWR - Transmit FIFO watermark register.
|
|
*
|
|
* Set the transmit fifo watermark register to "store and forward" mode
|
|
* and also set a threshold of 128 bytes in the fifo before transmission
|
|
* of a frame begins (to avoid dma underruns). Recent FEC hardware
|
|
* supports STRFWD and when that bit is set, the watermark level in the
|
|
* low bits is ignored. Older hardware doesn't have STRFWD, but writing
|
|
* to that bit is innocuous, and the TWFR bits get used instead.
|
|
*/
|
|
WR4(sc, FEC_TFWR_REG, FEC_TFWR_STRFWD | FEC_TFWR_TWFR_128BYTE);
|
|
|
|
/* RCR - Receive control register.
|
|
*
|
|
* Set max frame length + clean out anything left from u-boot.
|
|
*/
|
|
WR4(sc, FEC_RCR_REG, (maxfl << FEC_RCR_MAX_FL_SHIFT));
|
|
|
|
/*
|
|
* TCR - Transmit control register.
|
|
*
|
|
* Clean out anything left from u-boot. Any necessary values are set in
|
|
* ffec_miibus_statchg() based on the media type.
|
|
*/
|
|
WR4(sc, FEC_TCR_REG, 0);
|
|
|
|
/*
|
|
* OPD - Opcode/pause duration.
|
|
*
|
|
* XXX These magic numbers come from u-boot.
|
|
*/
|
|
WR4(sc, FEC_OPD_REG, 0x00010020);
|
|
|
|
/*
|
|
* FRSR - Fifo receive start register.
|
|
*
|
|
* This register does not exist on imx6, it is present on earlier
|
|
* hardware. The u-boot code sets this to a non-default value that's 32
|
|
* bytes larger than the default, with no clue as to why. The default
|
|
* value should work fine, so there's no code to init it here.
|
|
*/
|
|
|
|
/*
|
|
* MRBR - Max RX buffer size.
|
|
*
|
|
* Note: For hardware prior to imx6 this value cannot exceed 0x07ff,
|
|
* but the datasheet says no such thing for imx6. On the imx6, setting
|
|
* this to 2K without setting EN1588 resulted in a crazy runaway
|
|
* receive loop in the hardware, where every rx descriptor in the ring
|
|
* had its EMPTY flag cleared, no completion or error flags set, and a
|
|
* length of zero. I think maybe you can only exceed it when EN1588 is
|
|
* set, like maybe that's what enables jumbo frames, because in general
|
|
* the EN1588 flag seems to be the "enable new stuff" vs. "be legacy-
|
|
* compatible" flag.
|
|
*/
|
|
WR4(sc, FEC_MRBR_REG, maxfl << FEC_MRBR_R_BUF_SIZE_SHIFT);
|
|
|
|
/*
|
|
* FTRL - Frame truncation length.
|
|
*
|
|
* Must be greater than or equal to the value set in FEC_RCR_MAXFL.
|
|
*/
|
|
WR4(sc, FEC_FTRL_REG, maxfl);
|
|
|
|
/*
|
|
* RDSR / TDSR descriptor ring pointers.
|
|
*
|
|
* When we turn on ECR_ETHEREN at the end, the hardware zeroes its
|
|
* internal current descriptor index values for both rings, so we zero
|
|
* our index values as well.
|
|
*/
|
|
sc->rx_idx = 0;
|
|
sc->tx_idx_head = sc->tx_idx_tail = 0;
|
|
sc->txcount = 0;
|
|
WR4(sc, FEC_RDSR_REG, sc->rxdesc_ring_paddr);
|
|
WR4(sc, FEC_TDSR_REG, sc->txdesc_ring_paddr);
|
|
|
|
/*
|
|
* EIM - interrupt mask register.
|
|
*
|
|
* We always enable the same set of interrupts while running; unlike
|
|
* some drivers there's no need to change the mask on the fly depending
|
|
* on what operations are in progress.
|
|
*/
|
|
WR4(sc, FEC_IEM_REG, FEC_IER_TXF | FEC_IER_RXF | FEC_IER_EBERR);
|
|
|
|
/*
|
|
* MIBC - MIB control (hardware stats).
|
|
*/
|
|
regval = RD4(sc, FEC_MIBC_REG);
|
|
WR4(sc, FEC_MIBC_REG, regval | FEC_MIBC_DIS);
|
|
ffec_clear_stats(sc);
|
|
WR4(sc, FEC_MIBC_REG, regval & ~FEC_MIBC_DIS);
|
|
|
|
/*
|
|
* ECR - Ethernet control register.
|
|
*
|
|
* This must happen after all the other config registers are set. If
|
|
* we're running on little-endian hardware, also set the flag for byte-
|
|
* swapping descriptor ring entries. This flag doesn't exist on older
|
|
* hardware, but it can be safely set -- the bit position it occupies
|
|
* was unused.
|
|
*/
|
|
regval = RD4(sc, FEC_ECR_REG);
|
|
#if _BYTE_ORDER == _LITTLE_ENDIAN
|
|
regval |= FEC_ECR_DBSWP;
|
|
#endif
|
|
regval |= FEC_ECR_ETHEREN;
|
|
WR4(sc, FEC_ECR_REG, regval);
|
|
|
|
ifp->if_drv_flags |= IFF_DRV_RUNNING;
|
|
|
|
/*
|
|
* Call mii_mediachg() which will call back into ffec_miibus_statchg() to
|
|
* set up the remaining config registers based on the current media.
|
|
*/
|
|
mii_mediachg(sc->mii_softc);
|
|
callout_reset(&sc->ffec_callout, hz, ffec_tick, sc);
|
|
|
|
/*
|
|
* Tell the hardware that receive buffers are available. They were made
|
|
* available in ffec_attach() or ffec_stop().
|
|
*/
|
|
WR4(sc, FEC_RDAR_REG, FEC_RDAR_RDAR);
|
|
}
|
|
|
|
static void
|
|
ffec_init(void *if_softc)
|
|
{
|
|
struct ffec_softc *sc = if_softc;
|
|
|
|
FFEC_LOCK(sc);
|
|
ffec_init_locked(sc);
|
|
FFEC_UNLOCK(sc);
|
|
}
|
|
|
|
static void
|
|
ffec_intr(void *arg)
|
|
{
|
|
struct ffec_softc *sc;
|
|
uint32_t ier;
|
|
|
|
sc = arg;
|
|
|
|
FFEC_LOCK(sc);
|
|
|
|
ier = RD4(sc, FEC_IER_REG);
|
|
|
|
if (ier & FEC_IER_TXF) {
|
|
WR4(sc, FEC_IER_REG, FEC_IER_TXF);
|
|
ffec_txfinish_locked(sc);
|
|
}
|
|
|
|
if (ier & FEC_IER_RXF) {
|
|
WR4(sc, FEC_IER_REG, FEC_IER_RXF);
|
|
ffec_rxfinish_locked(sc);
|
|
}
|
|
|
|
/*
|
|
* We actually don't care about most errors, because the hardware copes
|
|
* with them just fine, discarding the incoming bad frame, or forcing a
|
|
* bad CRC onto an outgoing bad frame, and counting the errors in the
|
|
* stats registers. The one that really matters is EBERR (DMA bus
|
|
* error) because the hardware automatically clears ECR[ETHEREN] and we
|
|
* have to restart it here. It should never happen.
|
|
*/
|
|
if (ier & FEC_IER_EBERR) {
|
|
WR4(sc, FEC_IER_REG, FEC_IER_EBERR);
|
|
device_printf(sc->dev,
|
|
"Ethernet DMA error, restarting controller.\n");
|
|
ffec_stop_locked(sc);
|
|
ffec_init_locked(sc);
|
|
}
|
|
|
|
FFEC_UNLOCK(sc);
|
|
|
|
}
|
|
|
|
static int
|
|
ffec_ioctl(struct ifnet *ifp, u_long cmd, caddr_t data)
|
|
{
|
|
struct ffec_softc *sc;
|
|
struct mii_data *mii;
|
|
struct ifreq *ifr;
|
|
int mask, error;
|
|
|
|
sc = ifp->if_softc;
|
|
ifr = (struct ifreq *)data;
|
|
|
|
error = 0;
|
|
switch (cmd) {
|
|
case SIOCSIFFLAGS:
|
|
FFEC_LOCK(sc);
|
|
if (ifp->if_flags & IFF_UP) {
|
|
if (ifp->if_drv_flags & IFF_DRV_RUNNING) {
|
|
if ((ifp->if_flags ^ sc->if_flags) &
|
|
(IFF_PROMISC | IFF_ALLMULTI))
|
|
ffec_setup_rxfilter(sc);
|
|
} else {
|
|
if (!sc->is_detaching)
|
|
ffec_init_locked(sc);
|
|
}
|
|
} else {
|
|
if (ifp->if_drv_flags & IFF_DRV_RUNNING)
|
|
ffec_stop_locked(sc);
|
|
}
|
|
sc->if_flags = ifp->if_flags;
|
|
FFEC_UNLOCK(sc);
|
|
break;
|
|
|
|
case SIOCADDMULTI:
|
|
case SIOCDELMULTI:
|
|
if (ifp->if_drv_flags & IFF_DRV_RUNNING) {
|
|
FFEC_LOCK(sc);
|
|
ffec_setup_rxfilter(sc);
|
|
FFEC_UNLOCK(sc);
|
|
}
|
|
break;
|
|
|
|
case SIOCSIFMEDIA:
|
|
case SIOCGIFMEDIA:
|
|
mii = sc->mii_softc;
|
|
error = ifmedia_ioctl(ifp, ifr, &mii->mii_media, cmd);
|
|
break;
|
|
|
|
case SIOCSIFCAP:
|
|
mask = ifp->if_capenable ^ ifr->ifr_reqcap;
|
|
if (mask & IFCAP_VLAN_MTU) {
|
|
/* No work to do except acknowledge the change took. */
|
|
ifp->if_capenable ^= IFCAP_VLAN_MTU;
|
|
}
|
|
break;
|
|
|
|
default:
|
|
error = ether_ioctl(ifp, cmd, data);
|
|
break;
|
|
}
|
|
|
|
return (error);
|
|
}
|
|
|
|
static int
|
|
ffec_detach(device_t dev)
|
|
{
|
|
struct ffec_softc *sc;
|
|
bus_dmamap_t map;
|
|
int idx;
|
|
|
|
/*
|
|
* NB: This function can be called internally to unwind a failure to
|
|
* attach. Make sure a resource got allocated/created before destroying.
|
|
*/
|
|
|
|
sc = device_get_softc(dev);
|
|
|
|
if (sc->is_attached) {
|
|
FFEC_LOCK(sc);
|
|
sc->is_detaching = true;
|
|
ffec_stop_locked(sc);
|
|
FFEC_UNLOCK(sc);
|
|
callout_drain(&sc->ffec_callout);
|
|
ether_ifdetach(sc->ifp);
|
|
}
|
|
|
|
/* XXX no miibus detach? */
|
|
|
|
/* Clean up RX DMA resources and free mbufs. */
|
|
for (idx = 0; idx < RX_DESC_COUNT; ++idx) {
|
|
if ((map = sc->rxbuf_map[idx].map) != NULL) {
|
|
bus_dmamap_unload(sc->rxbuf_tag, map);
|
|
bus_dmamap_destroy(sc->rxbuf_tag, map);
|
|
m_freem(sc->rxbuf_map[idx].mbuf);
|
|
}
|
|
}
|
|
if (sc->rxbuf_tag != NULL)
|
|
bus_dma_tag_destroy(sc->rxbuf_tag);
|
|
if (sc->rxdesc_map != NULL) {
|
|
bus_dmamap_unload(sc->rxdesc_tag, sc->rxdesc_map);
|
|
bus_dmamap_destroy(sc->rxdesc_tag, sc->rxdesc_map);
|
|
}
|
|
if (sc->rxdesc_tag != NULL)
|
|
bus_dma_tag_destroy(sc->rxdesc_tag);
|
|
|
|
/* Clean up TX DMA resources. */
|
|
for (idx = 0; idx < TX_DESC_COUNT; ++idx) {
|
|
if ((map = sc->txbuf_map[idx].map) != NULL) {
|
|
/* TX maps are already unloaded. */
|
|
bus_dmamap_destroy(sc->txbuf_tag, map);
|
|
}
|
|
}
|
|
if (sc->txbuf_tag != NULL)
|
|
bus_dma_tag_destroy(sc->txbuf_tag);
|
|
if (sc->txdesc_map != NULL) {
|
|
bus_dmamap_unload(sc->txdesc_tag, sc->txdesc_map);
|
|
bus_dmamap_destroy(sc->txdesc_tag, sc->txdesc_map);
|
|
}
|
|
if (sc->txdesc_tag != NULL)
|
|
bus_dma_tag_destroy(sc->txdesc_tag);
|
|
|
|
/* Release bus resources. */
|
|
if (sc->intr_cookie)
|
|
bus_teardown_intr(dev, sc->irq_res, sc->intr_cookie);
|
|
|
|
if (sc->irq_res != NULL)
|
|
bus_release_resource(dev, SYS_RES_IRQ, 0, sc->irq_res);
|
|
|
|
if (sc->mem_res != NULL)
|
|
bus_release_resource(dev, SYS_RES_MEMORY, 0, sc->mem_res);
|
|
|
|
FFEC_LOCK_DESTROY(sc);
|
|
return (0);
|
|
}
|
|
|
|
static int
|
|
ffec_attach(device_t dev)
|
|
{
|
|
struct ffec_softc *sc;
|
|
struct ifnet *ifp = NULL;
|
|
struct mbuf *m;
|
|
phandle_t ofw_node;
|
|
int error, rid;
|
|
uint8_t eaddr[ETHER_ADDR_LEN];
|
|
char phy_conn_name[32];
|
|
uint32_t idx, mscr;
|
|
|
|
sc = device_get_softc(dev);
|
|
sc->dev = dev;
|
|
|
|
FFEC_LOCK_INIT(sc);
|
|
|
|
/*
|
|
* There are differences in the implementation and features of the FEC
|
|
* hardware on different SoCs, so figure out what type we are.
|
|
*/
|
|
sc->fectype = ofw_bus_search_compatible(dev, compat_data)->ocd_data;
|
|
|
|
/*
|
|
* We have to be told what kind of electrical connection exists between
|
|
* the MAC and PHY or we can't operate correctly.
|
|
*/
|
|
if ((ofw_node = ofw_bus_get_node(dev)) == -1) {
|
|
device_printf(dev, "Impossible: Can't find ofw bus node\n");
|
|
error = ENXIO;
|
|
goto out;
|
|
}
|
|
if (OF_searchprop(ofw_node, "phy-mode",
|
|
phy_conn_name, sizeof(phy_conn_name)) != -1) {
|
|
if (strcasecmp(phy_conn_name, "mii") == 0)
|
|
sc->phy_conn_type = PHY_CONN_MII;
|
|
else if (strcasecmp(phy_conn_name, "rmii") == 0)
|
|
sc->phy_conn_type = PHY_CONN_RMII;
|
|
else if (strcasecmp(phy_conn_name, "rgmii") == 0)
|
|
sc->phy_conn_type = PHY_CONN_RGMII;
|
|
}
|
|
if (sc->phy_conn_type == PHY_CONN_UNKNOWN) {
|
|
device_printf(sc->dev, "No valid 'phy-mode' "
|
|
"property found in FDT data for device.\n");
|
|
error = ENOATTR;
|
|
goto out;
|
|
}
|
|
|
|
callout_init_mtx(&sc->ffec_callout, &sc->mtx, 0);
|
|
|
|
/* Allocate bus resources for accessing the hardware. */
|
|
rid = 0;
|
|
sc->mem_res = bus_alloc_resource_any(dev, SYS_RES_MEMORY, &rid,
|
|
RF_ACTIVE);
|
|
if (sc->mem_res == NULL) {
|
|
device_printf(dev, "could not allocate memory resources.\n");
|
|
error = ENOMEM;
|
|
goto out;
|
|
}
|
|
rid = 0;
|
|
sc->irq_res = bus_alloc_resource_any(dev, SYS_RES_IRQ, &rid,
|
|
RF_ACTIVE);
|
|
if (sc->irq_res == NULL) {
|
|
device_printf(dev, "could not allocate interrupt resources.\n");
|
|
error = ENOMEM;
|
|
goto out;
|
|
}
|
|
|
|
/*
|
|
* Set up TX descriptor ring, descriptors, and dma maps.
|
|
*/
|
|
error = bus_dma_tag_create(
|
|
bus_get_dma_tag(dev), /* Parent tag. */
|
|
FEC_DESC_RING_ALIGN, 0, /* alignment, boundary */
|
|
BUS_SPACE_MAXADDR_32BIT, /* lowaddr */
|
|
BUS_SPACE_MAXADDR, /* highaddr */
|
|
NULL, NULL, /* filter, filterarg */
|
|
TX_DESC_SIZE, 1, /* maxsize, nsegments */
|
|
TX_DESC_SIZE, /* maxsegsize */
|
|
0, /* flags */
|
|
NULL, NULL, /* lockfunc, lockarg */
|
|
&sc->txdesc_tag);
|
|
if (error != 0) {
|
|
device_printf(sc->dev,
|
|
"could not create TX ring DMA tag.\n");
|
|
goto out;
|
|
}
|
|
|
|
error = bus_dmamem_alloc(sc->txdesc_tag, (void**)&sc->txdesc_ring,
|
|
BUS_DMA_COHERENT | BUS_DMA_WAITOK | BUS_DMA_ZERO, &sc->txdesc_map);
|
|
if (error != 0) {
|
|
device_printf(sc->dev,
|
|
"could not allocate TX descriptor ring.\n");
|
|
goto out;
|
|
}
|
|
|
|
error = bus_dmamap_load(sc->txdesc_tag, sc->txdesc_map, sc->txdesc_ring,
|
|
TX_DESC_SIZE, ffec_get1paddr, &sc->txdesc_ring_paddr, 0);
|
|
if (error != 0) {
|
|
device_printf(sc->dev,
|
|
"could not load TX descriptor ring map.\n");
|
|
goto out;
|
|
}
|
|
|
|
error = bus_dma_tag_create(
|
|
bus_get_dma_tag(dev), /* Parent tag. */
|
|
FEC_TXBUF_ALIGN, 0, /* alignment, boundary */
|
|
BUS_SPACE_MAXADDR_32BIT, /* lowaddr */
|
|
BUS_SPACE_MAXADDR, /* highaddr */
|
|
NULL, NULL, /* filter, filterarg */
|
|
MCLBYTES, 1, /* maxsize, nsegments */
|
|
MCLBYTES, /* maxsegsize */
|
|
0, /* flags */
|
|
NULL, NULL, /* lockfunc, lockarg */
|
|
&sc->txbuf_tag);
|
|
if (error != 0) {
|
|
device_printf(sc->dev,
|
|
"could not create TX ring DMA tag.\n");
|
|
goto out;
|
|
}
|
|
|
|
for (idx = 0; idx < TX_DESC_COUNT; ++idx) {
|
|
error = bus_dmamap_create(sc->txbuf_tag, 0,
|
|
&sc->txbuf_map[idx].map);
|
|
if (error != 0) {
|
|
device_printf(sc->dev,
|
|
"could not create TX buffer DMA map.\n");
|
|
goto out;
|
|
}
|
|
ffec_setup_txdesc(sc, idx, 0, 0);
|
|
}
|
|
|
|
/*
|
|
* Set up RX descriptor ring, descriptors, dma maps, and mbufs.
|
|
*/
|
|
error = bus_dma_tag_create(
|
|
bus_get_dma_tag(dev), /* Parent tag. */
|
|
FEC_DESC_RING_ALIGN, 0, /* alignment, boundary */
|
|
BUS_SPACE_MAXADDR_32BIT, /* lowaddr */
|
|
BUS_SPACE_MAXADDR, /* highaddr */
|
|
NULL, NULL, /* filter, filterarg */
|
|
RX_DESC_SIZE, 1, /* maxsize, nsegments */
|
|
RX_DESC_SIZE, /* maxsegsize */
|
|
0, /* flags */
|
|
NULL, NULL, /* lockfunc, lockarg */
|
|
&sc->rxdesc_tag);
|
|
if (error != 0) {
|
|
device_printf(sc->dev,
|
|
"could not create RX ring DMA tag.\n");
|
|
goto out;
|
|
}
|
|
|
|
error = bus_dmamem_alloc(sc->rxdesc_tag, (void **)&sc->rxdesc_ring,
|
|
BUS_DMA_COHERENT | BUS_DMA_WAITOK | BUS_DMA_ZERO, &sc->rxdesc_map);
|
|
if (error != 0) {
|
|
device_printf(sc->dev,
|
|
"could not allocate RX descriptor ring.\n");
|
|
goto out;
|
|
}
|
|
|
|
error = bus_dmamap_load(sc->rxdesc_tag, sc->rxdesc_map, sc->rxdesc_ring,
|
|
RX_DESC_SIZE, ffec_get1paddr, &sc->rxdesc_ring_paddr, 0);
|
|
if (error != 0) {
|
|
device_printf(sc->dev,
|
|
"could not load RX descriptor ring map.\n");
|
|
goto out;
|
|
}
|
|
|
|
error = bus_dma_tag_create(
|
|
bus_get_dma_tag(dev), /* Parent tag. */
|
|
1, 0, /* alignment, boundary */
|
|
BUS_SPACE_MAXADDR_32BIT, /* lowaddr */
|
|
BUS_SPACE_MAXADDR, /* highaddr */
|
|
NULL, NULL, /* filter, filterarg */
|
|
MCLBYTES, 1, /* maxsize, nsegments */
|
|
MCLBYTES, /* maxsegsize */
|
|
0, /* flags */
|
|
NULL, NULL, /* lockfunc, lockarg */
|
|
&sc->rxbuf_tag);
|
|
if (error != 0) {
|
|
device_printf(sc->dev,
|
|
"could not create RX buf DMA tag.\n");
|
|
goto out;
|
|
}
|
|
|
|
for (idx = 0; idx < RX_DESC_COUNT; ++idx) {
|
|
error = bus_dmamap_create(sc->rxbuf_tag, 0,
|
|
&sc->rxbuf_map[idx].map);
|
|
if (error != 0) {
|
|
device_printf(sc->dev,
|
|
"could not create RX buffer DMA map.\n");
|
|
goto out;
|
|
}
|
|
if ((m = ffec_alloc_mbufcl(sc)) == NULL) {
|
|
device_printf(dev, "Could not alloc mbuf\n");
|
|
error = ENOMEM;
|
|
goto out;
|
|
}
|
|
if ((error = ffec_setup_rxbuf(sc, idx, m)) != 0) {
|
|
device_printf(sc->dev,
|
|
"could not create new RX buffer.\n");
|
|
goto out;
|
|
}
|
|
}
|
|
|
|
/* Try to get the MAC address from the hardware before resetting it. */
|
|
ffec_get_hwaddr(sc, eaddr);
|
|
|
|
/* Reset the hardware. Disables all interrupts. */
|
|
WR4(sc, FEC_ECR_REG, FEC_ECR_RESET);
|
|
|
|
/* Setup interrupt handler. */
|
|
error = bus_setup_intr(dev, sc->irq_res, INTR_TYPE_NET | INTR_MPSAFE,
|
|
NULL, ffec_intr, sc, &sc->intr_cookie);
|
|
if (error != 0) {
|
|
device_printf(dev, "could not setup interrupt handler.\n");
|
|
goto out;
|
|
}
|
|
|
|
/*
|
|
* Set up the PHY control register.
|
|
*
|
|
* Speed formula for ENET is md_clock = mac_clock / ((N + 1) * 2).
|
|
* Speed formula for FEC is md_clock = mac_clock / (N * 2)
|
|
*
|
|
* XXX - Revisit this...
|
|
*
|
|
* For a Wandboard imx6 (ENET) I was originally using 4, but the uboot
|
|
* code uses 10. Both values seem to work, but I suspect many modern
|
|
* PHY parts can do mdio at speeds far above the standard 2.5 MHz.
|
|
*
|
|
* Different imx manuals use confusingly different terminology (things
|
|
* like "system clock" and "internal module clock") with examples that
|
|
* use frequencies that have nothing to do with ethernet, giving the
|
|
* vague impression that maybe the clock in question is the periphclock
|
|
* or something. In fact, on an imx53 development board (FEC),
|
|
* measuring the mdio clock at the pin on the PHY and playing with
|
|
* various divisors showed that the root speed was 66 MHz (clk_ipg_root
|
|
* aka periphclock) and 13 was the right divisor.
|
|
*
|
|
* All in all, it seems likely that 13 is a safe divisor for now,
|
|
* because if we really do need to base it on the peripheral clock
|
|
* speed, then we need a platform-independant get-clock-freq API.
|
|
*/
|
|
mscr = 13 << FEC_MSCR_MII_SPEED_SHIFT;
|
|
if (OF_hasprop(ofw_node, "phy-disable-preamble")) {
|
|
mscr |= FEC_MSCR_DIS_PRE;
|
|
if (bootverbose)
|
|
device_printf(dev, "PHY preamble disabled\n");
|
|
}
|
|
WR4(sc, FEC_MSCR_REG, mscr);
|
|
|
|
/* Set up the ethernet interface. */
|
|
sc->ifp = ifp = if_alloc(IFT_ETHER);
|
|
|
|
ifp->if_softc = sc;
|
|
if_initname(ifp, device_get_name(dev), device_get_unit(dev));
|
|
ifp->if_flags = IFF_BROADCAST | IFF_SIMPLEX | IFF_MULTICAST;
|
|
ifp->if_capabilities = IFCAP_VLAN_MTU;
|
|
ifp->if_capenable = ifp->if_capabilities;
|
|
ifp->if_start = ffec_txstart;
|
|
ifp->if_ioctl = ffec_ioctl;
|
|
ifp->if_init = ffec_init;
|
|
IFQ_SET_MAXLEN(&ifp->if_snd, TX_DESC_COUNT - 1);
|
|
ifp->if_snd.ifq_drv_maxlen = TX_DESC_COUNT - 1;
|
|
IFQ_SET_READY(&ifp->if_snd);
|
|
ifp->if_hdrlen = sizeof(struct ether_vlan_header);
|
|
|
|
#if 0 /* XXX The hardware keeps stats we could use for these. */
|
|
ifp->if_linkmib = &sc->mibdata;
|
|
ifp->if_linkmiblen = sizeof(sc->mibdata);
|
|
#endif
|
|
|
|
/* Set up the miigasket hardware (if any). */
|
|
ffec_miigasket_setup(sc);
|
|
|
|
/* Attach the mii driver. */
|
|
error = mii_attach(dev, &sc->miibus, ifp, ffec_media_change,
|
|
ffec_media_status, BMSR_DEFCAPMASK, MII_PHY_ANY, MII_OFFSET_ANY,
|
|
(sc->fectype & FECTYPE_MVF) ? MIIF_FORCEANEG : 0);
|
|
if (error != 0) {
|
|
device_printf(dev, "PHY attach failed\n");
|
|
goto out;
|
|
}
|
|
sc->mii_softc = device_get_softc(sc->miibus);
|
|
|
|
/* All ready to run, attach the ethernet interface. */
|
|
ether_ifattach(ifp, eaddr);
|
|
sc->is_attached = true;
|
|
|
|
error = 0;
|
|
out:
|
|
|
|
if (error != 0)
|
|
ffec_detach(dev);
|
|
|
|
return (error);
|
|
}
|
|
|
|
static int
|
|
ffec_probe(device_t dev)
|
|
{
|
|
uintptr_t fectype;
|
|
|
|
if (!ofw_bus_status_okay(dev))
|
|
return (ENXIO);
|
|
|
|
fectype = ofw_bus_search_compatible(dev, compat_data)->ocd_data;
|
|
if (fectype == FECTYPE_NONE)
|
|
return (ENXIO);
|
|
|
|
device_set_desc(dev, (fectype & FECFLAG_GBE) ?
|
|
"Freescale Gigabit Ethernet Controller" :
|
|
"Freescale Fast Ethernet Controller");
|
|
|
|
return (BUS_PROBE_DEFAULT);
|
|
}
|
|
|
|
|
|
static device_method_t ffec_methods[] = {
|
|
/* Device interface. */
|
|
DEVMETHOD(device_probe, ffec_probe),
|
|
DEVMETHOD(device_attach, ffec_attach),
|
|
DEVMETHOD(device_detach, ffec_detach),
|
|
|
|
/*
|
|
DEVMETHOD(device_shutdown, ffec_shutdown),
|
|
DEVMETHOD(device_suspend, ffec_suspend),
|
|
DEVMETHOD(device_resume, ffec_resume),
|
|
*/
|
|
|
|
/* MII interface. */
|
|
DEVMETHOD(miibus_readreg, ffec_miibus_readreg),
|
|
DEVMETHOD(miibus_writereg, ffec_miibus_writereg),
|
|
DEVMETHOD(miibus_statchg, ffec_miibus_statchg),
|
|
|
|
DEVMETHOD_END
|
|
};
|
|
|
|
static driver_t ffec_driver = {
|
|
"ffec",
|
|
ffec_methods,
|
|
sizeof(struct ffec_softc)
|
|
};
|
|
|
|
static devclass_t ffec_devclass;
|
|
|
|
DRIVER_MODULE(ffec, simplebus, ffec_driver, ffec_devclass, 0, 0);
|
|
DRIVER_MODULE(miibus, ffec, miibus_driver, miibus_devclass, 0, 0);
|
|
|
|
MODULE_DEPEND(ffec, ether, 1, 1, 1);
|
|
MODULE_DEPEND(ffec, miibus, 1, 1, 1);
|