f8cc9b09b0
The RX EDMA support requires a modified approach to the RX descriptor
handling.
Specifically:
* There's now two RX queues - high and low priority;
* The RX queues are implemented as FIFOs; they're now an array of pointers
to buffers;
* .. and the RX buffer and descriptor are in the same "buffer", rather than
being separate.
So to that end, this commit abstracts out most of the RX related functions
from the bulk of the driver. Notably, the RX DMA/buffer allocation isn't
updated, primarily because I haven't yet fleshed out what it should look
like.
Whilst I'm here, create a set of matching but mostly unimplemented EDMA
stubs.
Tested:
* AR9280, station mode
TODO:
* Thorough AP and other mode testing for non-EDMA chips;
* Figure out how to allocate RX buffers suitable for RX EDMA, including
correctly setting the mbuf length to compensate for the RX descriptor
and completion status area.
193 lines
4.9 KiB
C
193 lines
4.9 KiB
C
/*-
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* Copyright (c) 2012 Adrian Chadd <adrian@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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* without modification.
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* 2. Redistributions in binary form must reproduce at minimum a disclaimer
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* similar to the "NO WARRANTY" disclaimer below ("Disclaimer") and any
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* redistribution must be conditioned upon including a substantially
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* similar Disclaimer requirement for further binary redistribution.
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*
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* NO WARRANTY
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* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
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* ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
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* LIMITED TO, THE IMPLIED WARRANTIES OF NONINFRINGEMENT, MERCHANTIBILITY
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* AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL
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* THE COPYRIGHT HOLDERS OR CONTRIBUTORS BE LIABLE FOR SPECIAL, EXEMPLARY,
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* OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
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* SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
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* INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER
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* IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
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* ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF
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* THE POSSIBILITY OF SUCH DAMAGES.
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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 the Atheros Wireless LAN controller.
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*
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* This software is derived from work of Atsushi Onoe; his contribution
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* is greatly appreciated.
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*/
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#include "opt_inet.h"
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#include "opt_ath.h"
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/*
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* This is needed for register operations which are performed
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* by the driver - eg, calls to ath_hal_gettsf32().
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*
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* It's also required for any AH_DEBUG checks in here, eg the
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* module dependencies.
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*/
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#include "opt_ah.h"
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#include "opt_wlan.h"
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#include <sys/param.h>
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#include <sys/systm.h>
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#include <sys/sysctl.h>
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#include <sys/mbuf.h>
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#include <sys/malloc.h>
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#include <sys/lock.h>
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#include <sys/mutex.h>
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#include <sys/kernel.h>
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#include <sys/socket.h>
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#include <sys/sockio.h>
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#include <sys/errno.h>
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#include <sys/callout.h>
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#include <sys/bus.h>
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#include <sys/endian.h>
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#include <sys/kthread.h>
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#include <sys/taskqueue.h>
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#include <sys/priv.h>
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#include <sys/module.h>
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#include <sys/ktr.h>
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#include <sys/smp.h> /* for mp_ncpus */
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#include <machine/bus.h>
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#include <net/if.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_arp.h>
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#include <net/ethernet.h>
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#include <net/if_llc.h>
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#include <net80211/ieee80211_var.h>
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#include <net80211/ieee80211_regdomain.h>
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#ifdef IEEE80211_SUPPORT_SUPERG
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#include <net80211/ieee80211_superg.h>
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#endif
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#ifdef IEEE80211_SUPPORT_TDMA
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#include <net80211/ieee80211_tdma.h>
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#endif
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#include <net/bpf.h>
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#ifdef INET
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#include <netinet/in.h>
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#include <netinet/if_ether.h>
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#endif
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#include <dev/ath/if_athvar.h>
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#include <dev/ath/ath_hal/ah_devid.h> /* XXX for softled */
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#include <dev/ath/ath_hal/ah_diagcodes.h>
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#include <dev/ath/if_ath_debug.h>
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#include <dev/ath/if_ath_misc.h>
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#include <dev/ath/if_ath_tsf.h>
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#include <dev/ath/if_ath_tx.h>
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#include <dev/ath/if_ath_sysctl.h>
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#include <dev/ath/if_ath_led.h>
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#include <dev/ath/if_ath_keycache.h>
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#include <dev/ath/if_ath_rx.h>
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#include <dev/ath/if_ath_beacon.h>
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#include <dev/ath/if_athdfs.h>
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#ifdef ATH_TX99_DIAG
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#include <dev/ath/ath_tx99/ath_tx99.h>
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#endif
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#include <dev/ath/if_ath_rx_edma.h>
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static void
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ath_edma_stoprecv(struct ath_softc *sc, int dodelay)
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{
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struct ath_hal *ah = sc->sc_ah;
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ath_hal_stoppcurecv(ah);
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ath_hal_setrxfilter(ah, 0);
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ath_hal_stopdmarecv(ah);
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DELAY(3000);
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if (sc->sc_rxpending != NULL) {
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m_freem(sc->sc_rxpending);
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sc->sc_rxpending = NULL;
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}
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sc->sc_rxlink = NULL;
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}
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static int
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ath_edma_startrecv(struct ath_softc *sc)
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{
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struct ath_hal *ah = sc->sc_ah;
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sc->sc_rxlink = NULL;
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sc->sc_rxpending = NULL;
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/* XXX setup HP RX queue FIFO pointer */
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/* XXX setup LP RX queue FIFO pointer */
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/* XXX ath_hal_rxena() */
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ath_mode_init(sc);
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ath_hal_startpcurecv(ah);
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return (0);
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}
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static void
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ath_edma_recv_flush(struct ath_softc *sc)
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{
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device_printf(sc->sc_dev, "%s: called\n", __func__);
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}
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static void
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ath_edma_recv_tasklet(void *arg, int npending)
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{
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struct ath_softc *sc = (struct ath_softc *) arg;
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device_printf(sc->sc_dev, "%s: called; npending=%d\n",
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__func__,
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npending);
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/* XXX TODO */
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}
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static int
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ath_edma_rxbuf_init(struct ath_softc *sc, struct ath_buf *bf)
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{
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device_printf(sc->sc_dev, "%s: called; bf=%p\n", __func__, bf);
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return (EIO);
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}
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void
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ath_recv_setup_edma(struct ath_softc *sc)
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{
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device_printf(sc->sc_dev, "DMA setup: EDMA\n");
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sc->sc_rx.recv_stop = ath_edma_stoprecv;
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sc->sc_rx.recv_start = ath_edma_startrecv;
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sc->sc_rx.recv_flush = ath_edma_recv_flush;
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sc->sc_rx.recv_tasklet = ath_edma_recv_tasklet;
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sc->sc_rx.recv_rxbuf_init = ath_edma_rxbuf_init;
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}
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