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/*-
* Copyright (c) 2008 Nathan Whitehorn
* Copyright (c) 2003 Peter Grehan
* All rights reserved
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* 2. Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the distribution.
*
* THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
* ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
* SUCH DAMAGE.
*
* $FreeBSD$
*/
/*
* Number of transmit/receive DBDMA descriptors.
* XXX allow override with a tuneable ?
*/
#define BM_MAX_DMA_COMMANDS 256
#define BM_NTXSEGS 16
#define BM_MAX_TX_PACKETS 100
#define BM_MAX_RX_PACKETS 100
/*
* Mutex macros
*/
#define BM_LOCK(_sc) mtx_lock(&(_sc)->sc_mtx)
#define BM_UNLOCK(_sc) mtx_unlock(&(_sc)->sc_mtx)
/*
* software state for transmit job mbufs (may be elements of mbuf chains)
*/
struct bm_txsoft {
struct mbuf *txs_mbuf; /* head of our mbuf chain */
bus_dmamap_t txs_dmamap; /* our DMA map */
int txs_firstdesc; /* first descriptor in packet */
int txs_lastdesc; /* last descriptor in packet */
int txs_stopdesc; /* the location of the closing STOP */
int txs_ndescs; /* number of descriptors */
STAILQ_ENTRY(bm_txsoft) txs_q;
};
STAILQ_HEAD(bm_txsq, bm_txsoft);
/*
* software state for receive jobs
*/
struct bm_rxsoft {
struct mbuf *rxs_mbuf; /* head of our mbuf chain */
bus_dmamap_t rxs_dmamap; /* our DMA map */
int dbdma_slot;
bus_dma_segment_t segment;
};
struct bm_softc {
struct ifnet *sc_ifp;
struct mtx sc_mtx;
u_char sc_enaddr[ETHER_ADDR_LEN];
int sc_streaming;
int sc_ifpflags;
int sc_duplex;
int sc_wdog_timer;
struct callout sc_tick_ch;
device_t sc_dev; /* back ptr to dev */
struct resource *sc_memr; /* macio bus mem resource */
int sc_memrid;
device_t sc_miibus;
struct mii_data *sc_mii;
struct resource *sc_txdmar, *sc_rxdmar;
int sc_txdmarid, sc_rxdmarid;
struct resource *sc_txdmairq, *sc_rxdmairq;
void *sc_txihtx, *sc_rxih;
int sc_txdmairqid, sc_rxdmairqid;
bus_dma_tag_t sc_pdma_tag;
bus_dma_tag_t sc_tdma_tag;
struct bm_txsoft sc_txsoft[BM_MAX_TX_PACKETS];
int first_used_txdma_slot, next_txdma_slot;
struct bm_txsq sc_txfreeq;
struct bm_txsq sc_txdirtyq;
bus_dma_tag_t sc_rdma_tag;
struct bm_rxsoft sc_rxsoft[BM_MAX_TX_PACKETS];
int next_rxdma_slot, rxdma_loop_slot;
dbdma_channel_t *sc_txdma, *sc_rxdma;
};
struct bm_mii_frame {
u_int8_t mii_stdelim;
u_int8_t mii_opcode;
u_int8_t mii_phyaddr;
u_int8_t mii_regaddr;
u_int8_t mii_turnaround;
u_int16_t mii_data;
};
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