73591c462d
handling in order to reduce interrupt overhead which results in better performance. - Call ether_ifdetach(9) before stopping the controller and the callouts detach in order to prevent active BPF listeners to clear promiscuous mode which may lead to the tick callout being restarted which will trigger a panic once it's actually gone. - Add explicit IFF_DRV_RUNNING checking in order to prevent extra link up/down events when using dhclient(8). - Use the correct macro for deciding whether 2/3 of the available TX descriptors are used. - Wrap the RX fault printing in #ifdef CAS_DEBUG in order to not unnecessarily frighten users and as debugging was the actual intention. Real errors caused by these faults still will be accumulated as input errors. It might be a good idea to later on add driver specific counters for the faults though. Submitted by: yongari (original patch)
264 lines
9.1 KiB
C
264 lines
9.1 KiB
C
/*-
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* Copyright (C) 2001 Eduardo Horvath.
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* Copyright (c) 2008 Marius Strobl <marius@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 ``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 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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* from: NetBSD: gemvar.h,v 1.8 2002/05/15 02:36:12 matt Exp
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* from: FreeBSD: if_gemvar.h 177560 2008-03-24 17:23:53Z marius
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*
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* $FreeBSD$
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*/
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#ifndef _IF_CASVAR_H
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#define _IF_CASVAR_H
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/*
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* The page size is configurable, but needs to be at least 8k (the
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* default) in order to also support jumbo buffers.
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*/
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#define CAS_PAGE_SIZE 8192
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/*
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* Transmit descriptor ring size - this is arbitrary, but allocate
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* enough descriptors for 64 pending transmissions and 16 segments
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* per packet. This limit is not actually enforced (packets with
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* more segments can be sent, depending on the busdma backend); it
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* is however used as an estimate for the TX window size.
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*/
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#define CAS_NTXSEGS 16
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#define CAS_TXQUEUELEN 64
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#define CAS_NTXDESC (CAS_TXQUEUELEN * CAS_NTXSEGS)
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#define CAS_MAXTXFREE (CAS_NTXDESC - 1)
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#define CAS_NTXDESC_MASK (CAS_NTXDESC - 1)
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#define CAS_NEXTTX(x) ((x + 1) & CAS_NTXDESC_MASK)
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/*
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* Receive completion ring size - we have one completion per
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* incoming packet (though the opposite isn't necesarrily true),
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* so this logic is a little simpler.
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*/
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#define CAS_NRXCOMP 4096
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#define CAS_NRXCOMP_MASK (CAS_NRXCOMP - 1)
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#define CAS_NEXTRXCOMP(x) ((x + 1) & CAS_NRXCOMP_MASK)
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/*
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* Receive descriptor ring sizes - for Cassini+ and Saturn both
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* rings must be at least initialized.
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*/
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#define CAS_NRXDESC 1024
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#define CAS_NRXDESC_MASK (CAS_NRXDESC - 1)
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#define CAS_NEXTRXDESC(x) ((x + 1) & CAS_NRXDESC_MASK)
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#define CAS_NRXDESC2 32
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#define CAS_NRXDESC2_MASK (CAS_NRXDESC2 - 1)
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#define CAS_NEXTRXDESC2(x) ((x + 1) & CAS_NRXDESC2_MASK)
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/*
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* How many ticks to wait until to retry on a RX descriptor that is
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* still owned by the hardware.
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*/
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#define CAS_RXOWN_TICKS (hz / 50)
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/*
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* Control structures are DMA'd to the chip. We allocate them
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* in a single clump that maps to a single DMA segment to make
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* several things easier.
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*/
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struct cas_control_data {
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struct cas_desc ccd_txdescs[CAS_NTXDESC]; /* TX descriptors */
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struct cas_rx_comp ccd_rxcomps[CAS_NRXCOMP]; /* RX completions */
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struct cas_desc ccd_rxdescs[CAS_NRXDESC]; /* RX descriptors */
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struct cas_desc ccd_rxdescs2[CAS_NRXDESC2]; /* RX descriptors 2 */
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};
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#define CAS_CDOFF(x) offsetof(struct cas_control_data, x)
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#define CAS_CDTXDOFF(x) CAS_CDOFF(ccd_txdescs[(x)])
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#define CAS_CDRXCOFF(x) CAS_CDOFF(ccd_rxcomps[(x)])
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#define CAS_CDRXDOFF(x) CAS_CDOFF(ccd_rxdescs[(x)])
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#define CAS_CDRXD2OFF(x) CAS_CDOFF(ccd_rxdescs2[(x)])
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/*
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* software state for transmit job mbufs (may be elements of mbuf chains)
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*/
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struct cas_txsoft {
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struct mbuf *txs_mbuf; /* head of our mbuf chain */
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bus_dmamap_t txs_dmamap; /* our DMA map */
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u_int txs_firstdesc; /* first descriptor in packet */
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u_int txs_lastdesc; /* last descriptor in packet */
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u_int txs_ndescs; /* number of descriptors */
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STAILQ_ENTRY(cas_txsoft) txs_q;
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};
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STAILQ_HEAD(cas_txsq, cas_txsoft);
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/*
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* software state for receive descriptors
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*/
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struct cas_rxdsoft {
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void *rxds_buf; /* receive buffer */
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bus_dmamap_t rxds_dmamap; /* our DMA map */
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bus_addr_t rxds_paddr; /* physical address of the segment */
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#if __FreeBSD_version < 800016
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struct cas_softc *rxds_sc; /* softc pointer */
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u_int rxds_idx; /* our index */
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#endif
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u_int rxds_refcount; /* hardware + mbuf references */
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};
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/*
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* software state per device
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*/
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struct cas_softc {
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struct ifnet *sc_ifp;
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struct mtx sc_mtx;
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device_t sc_miibus;
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struct mii_data *sc_mii; /* MII media control */
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device_t sc_dev; /* generic device information */
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u_char sc_enaddr[ETHER_ADDR_LEN];
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struct callout sc_tick_ch; /* tick callout */
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struct callout sc_rx_ch; /* delayed RX callout */
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struct task sc_intr_task;
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struct task sc_tx_task;
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struct taskqueue *sc_tq;
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u_int sc_wdog_timer; /* watchdog timer */
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void *sc_ih;
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struct resource *sc_res[2];
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#define CAS_RES_INTR 0
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#define CAS_RES_MEM 1
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bus_dma_tag_t sc_pdmatag; /* parent bus DMA tag */
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bus_dma_tag_t sc_rdmatag; /* RX bus DMA tag */
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bus_dma_tag_t sc_tdmatag; /* TX bus DMA tag */
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bus_dma_tag_t sc_cdmatag; /* control data bus DMA tag */
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bus_dmamap_t sc_dmamap; /* bus DMA handle */
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u_int sc_phyad; /* PHY to use or -1 for any */
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u_int sc_variant;
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#define CAS_UNKNOWN 0 /* don't know */
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#define CAS_CAS 1 /* Sun Cassini */
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#define CAS_CASPLUS 2 /* Sun Cassini+ */
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#define CAS_SATURN 3 /* National Semiconductor Saturn */
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u_int sc_flags;
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#define CAS_INITED (1 << 0) /* reset persistent regs init'ed */
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#define CAS_NO_CSUM (1 << 1) /* don't use hardware checksumming */
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#define CAS_LINK (1 << 2) /* link is up */
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#define CAS_REG_PLUS (1 << 3) /* has Cassini+ registers */
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#define CAS_SERDES (1 << 4) /* use the SERDES */
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#define CAS_TABORT (1 << 5) /* has target abort issues */
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bus_dmamap_t sc_cddmamap; /* control data DMA map */
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bus_addr_t sc_cddma;
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/*
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* software state for transmit and receive descriptors
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*/
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struct cas_txsoft sc_txsoft[CAS_TXQUEUELEN];
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struct cas_rxdsoft sc_rxdsoft[CAS_NRXDESC];
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/*
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* control data structures
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*/
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struct cas_control_data *sc_control_data;
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#define sc_txdescs sc_control_data->ccd_txdescs
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#define sc_rxcomps sc_control_data->ccd_rxcomps
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#define sc_rxdescs sc_control_data->ccd_rxdescs
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#define sc_rxdescs2 sc_control_data->ccd_rxdescs2
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u_int sc_txfree; /* number of free TX descriptors */
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u_int sc_txnext; /* next ready TX descriptor */
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u_int sc_txwin; /* TX desc. since last TX intr. */
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struct cas_txsq sc_txfreeq; /* free software TX descriptors */
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struct cas_txsq sc_txdirtyq; /* dirty software TX descriptors */
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u_int sc_rxcptr; /* next ready RX completion */
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u_int sc_rxdptr; /* next ready RX descriptor */
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int sc_ifflags;
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};
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#define CAS_BARRIER(sc, offs, len, flags) \
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bus_barrier((sc)->sc_res[CAS_RES_MEM], (offs), (len), (flags))
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#define CAS_READ_N(n, sc, offs) \
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bus_read_ ## n((sc)->sc_res[CAS_RES_MEM], (offs))
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#define CAS_READ_1(sc, offs) CAS_READ_N(1, (sc), (offs))
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#define CAS_READ_2(sc, offs) CAS_READ_N(2, (sc), (offs))
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#define CAS_READ_4(sc, offs) CAS_READ_N(4, (sc), (offs))
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#define CAS_WRITE_N(n, sc, offs, v) \
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bus_write_ ## n((sc)->sc_res[CAS_RES_MEM], (offs), (v))
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#define CAS_WRITE_1(sc, offs, v) CAS_WRITE_N(1, (sc), (offs), (v))
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#define CAS_WRITE_2(sc, offs, v) CAS_WRITE_N(2, (sc), (offs), (v))
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#define CAS_WRITE_4(sc, offs, v) CAS_WRITE_N(4, (sc), (offs), (v))
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#define CAS_CDTXDADDR(sc, x) ((sc)->sc_cddma + CAS_CDTXDOFF((x)))
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#define CAS_CDRXCADDR(sc, x) ((sc)->sc_cddma + CAS_CDRXCOFF((x)))
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#define CAS_CDRXDADDR(sc, x) ((sc)->sc_cddma + CAS_CDRXDOFF((x)))
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#define CAS_CDRXD2ADDR(sc, x) ((sc)->sc_cddma + CAS_CDRXD2OFF((x)))
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#define CAS_CDSYNC(sc, ops) \
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bus_dmamap_sync((sc)->sc_cdmatag, (sc)->sc_cddmamap, (ops));
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#define __CAS_UPDATE_RXDESC(rxd, rxds, s) \
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do { \
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\
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refcount_init(&(rxds)->rxds_refcount, 1); \
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(rxd)->cd_buf_ptr = htole64((rxds)->rxds_paddr); \
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KASSERT((s) < CAS_RD_BUF_INDEX_MASK >> CAS_RD_BUF_INDEX_SHFT, \
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("%s: RX buffer index too large!", __func__)); \
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(rxd)->cd_flags = \
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htole64((uint64_t)((s) << CAS_RD_BUF_INDEX_SHFT)); \
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} while (0)
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#define CAS_UPDATE_RXDESC(sc, d, s) \
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__CAS_UPDATE_RXDESC(&(sc)->sc_rxdescs[(d)], \
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&(sc)->sc_rxdsoft[(s)], (s))
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#if __FreeBSD_version < 800016
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#define CAS_INIT_RXDESC(sc, d, s) \
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do { \
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struct cas_rxdsoft *__rxds = &(sc)->sc_rxdsoft[(s)]; \
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\
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__rxds->rxds_sc = (sc); \
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__rxds->rxds_idx = (s); \
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__CAS_UPDATE_RXDESC(&(sc)->sc_rxdescs[(d)], __rxds, (s)); \
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} while (0)
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#else
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#define CAS_INIT_RXDESC(sc, d, s) CAS_UPDATE_RXDESC(sc, d, s)
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#endif
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#define CAS_LOCK_INIT(_sc, _name) \
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mtx_init(&(_sc)->sc_mtx, _name, MTX_NETWORK_LOCK, MTX_DEF)
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#define CAS_LOCK(_sc) mtx_lock(&(_sc)->sc_mtx)
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#define CAS_UNLOCK(_sc) mtx_unlock(&(_sc)->sc_mtx)
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#define CAS_LOCK_ASSERT(_sc, _what) mtx_assert(&(_sc)->sc_mtx, (_what))
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#define CAS_LOCK_DESTROY(_sc) mtx_destroy(&(_sc)->sc_mtx)
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#define CAS_LOCK_OWNED(_sc) mtx_owned(&(_sc)->sc_mtx)
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#endif
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