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/*-
* Copyright (C) 2001 Eduardo Horvath.
* Copyright (c) 2008 Marius Strobl <marius@FreeBSD.org>
* 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 ``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 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.
*
* from: NetBSD: gemvar.h,v 1.8 2002/05/15 02:36:12 matt Exp
* from: FreeBSD: if_gemvar.h 177560 2008-03-24 17:23:53Z marius
*
* $FreeBSD: release/9.1.0/sys/dev/cas/if_casvar.h 223951 2011-07-12 13:22:17Z marius $
*/
#ifndef _IF_CASVAR_H
#define _IF_CASVAR_H
/*
* The page size is configurable, but needs to be at least 8k (the
* default) in order to also support jumbo buffers.
*/
#define CAS_PAGE_SIZE 8192
/*
* Transmit descriptor ring size - this is arbitrary, but allocate
* enough descriptors for 64 pending transmissions and 16 segments
* per packet. This limit is not actually enforced (packets with
* more segments can be sent, depending on the busdma backend); it
* is however used as an estimate for the TX window size.
*/
#define CAS_NTXSEGS 16
#define CAS_TXQUEUELEN 64
#define CAS_NTXDESC (CAS_TXQUEUELEN * CAS_NTXSEGS)
#define CAS_MAXTXFREE (CAS_NTXDESC - 1)
#define CAS_NTXDESC_MASK (CAS_NTXDESC - 1)
#define CAS_NEXTTX(x) ((x + 1) & CAS_NTXDESC_MASK)
/*
* Receive completion ring size - we have one completion per
* incoming packet (though the opposite isn't necesarrily true),
* so this logic is a little simpler.
*/
#define CAS_NRXCOMP 4096
#define CAS_NRXCOMP_MASK (CAS_NRXCOMP - 1)
#define CAS_NEXTRXCOMP(x) ((x + 1) & CAS_NRXCOMP_MASK)
/*
* Receive descriptor ring sizes - for Cassini+ and Saturn both
* rings must be at least initialized.
*/
#define CAS_NRXDESC 1024
#define CAS_NRXDESC_MASK (CAS_NRXDESC - 1)
#define CAS_NEXTRXDESC(x) ((x + 1) & CAS_NRXDESC_MASK)
#define CAS_NRXDESC2 32
#define CAS_NRXDESC2_MASK (CAS_NRXDESC2 - 1)
#define CAS_NEXTRXDESC2(x) ((x + 1) & CAS_NRXDESC2_MASK)
/*
* How many ticks to wait until to retry on a RX descriptor that is
* still owned by the hardware.
*/
#define CAS_RXOWN_TICKS (hz / 50)
/*
* Control structures are DMA'd to the chip. We allocate them
* in a single clump that maps to a single DMA segment to make
* several things easier.
*/
struct cas_control_data {
struct cas_desc ccd_txdescs[CAS_NTXDESC]; /* TX descriptors */
struct cas_rx_comp ccd_rxcomps[CAS_NRXCOMP]; /* RX completions */
struct cas_desc ccd_rxdescs[CAS_NRXDESC]; /* RX descriptors */
struct cas_desc ccd_rxdescs2[CAS_NRXDESC2]; /* RX descriptors 2 */
};
#define CAS_CDOFF(x) offsetof(struct cas_control_data, x)
#define CAS_CDTXDOFF(x) CAS_CDOFF(ccd_txdescs[(x)])
#define CAS_CDRXCOFF(x) CAS_CDOFF(ccd_rxcomps[(x)])
#define CAS_CDRXDOFF(x) CAS_CDOFF(ccd_rxdescs[(x)])
#define CAS_CDRXD2OFF(x) CAS_CDOFF(ccd_rxdescs2[(x)])
/*
* software state for transmit job mbufs (may be elements of mbuf chains)
*/
struct cas_txsoft {
struct mbuf *txs_mbuf; /* head of our mbuf chain */
bus_dmamap_t txs_dmamap; /* our DMA map */
u_int txs_firstdesc; /* first descriptor in packet */
u_int txs_lastdesc; /* last descriptor in packet */
u_int txs_ndescs; /* number of descriptors */
STAILQ_ENTRY(cas_txsoft) txs_q;
};
STAILQ_HEAD(cas_txsq, cas_txsoft);
/*
* software state for receive descriptors
*/
struct cas_rxdsoft {
void *rxds_buf; /* receive buffer */
bus_dmamap_t rxds_dmamap; /* our DMA map */
bus_addr_t rxds_paddr; /* physical address of the segment */
#if __FreeBSD_version < 800016
struct cas_softc *rxds_sc; /* softc pointer */
u_int rxds_idx; /* our index */
#endif
u_int rxds_refcount; /* hardware + mbuf references */
};
/*
* software state per device
*/
struct cas_softc {
struct ifnet *sc_ifp;
struct mtx sc_mtx;
device_t sc_miibus;
struct mii_data *sc_mii; /* MII media control */
device_t sc_dev; /* generic device information */
u_char sc_enaddr[ETHER_ADDR_LEN];
struct callout sc_tick_ch; /* tick callout */
struct callout sc_rx_ch; /* delayed RX callout */
struct task sc_intr_task;
struct task sc_tx_task;
struct taskqueue *sc_tq;
u_int sc_wdog_timer; /* watchdog timer */
void *sc_ih;
struct resource *sc_res[2];
#define CAS_RES_INTR 0
#define CAS_RES_MEM 1
bus_dma_tag_t sc_pdmatag; /* parent bus DMA tag */
bus_dma_tag_t sc_rdmatag; /* RX bus DMA tag */
bus_dma_tag_t sc_tdmatag; /* TX bus DMA tag */
bus_dma_tag_t sc_cdmatag; /* control data bus DMA tag */
bus_dmamap_t sc_dmamap; /* bus DMA handle */
u_int sc_variant;
#define CAS_UNKNOWN 0 /* don't know */
#define CAS_CAS 1 /* Sun Cassini */
#define CAS_CASPLUS 2 /* Sun Cassini+ */
#define CAS_SATURN 3 /* National Semiconductor Saturn */
u_int sc_flags;
#define CAS_INITED (1 << 0) /* reset persistent regs init'ed */
#define CAS_NO_CSUM (1 << 1) /* don't use hardware checksumming */
#define CAS_LINK (1 << 2) /* link is up */
#define CAS_REG_PLUS (1 << 3) /* has Cassini+ registers */
#define CAS_SERDES (1 << 4) /* use the SERDES */
#define CAS_TABORT (1 << 5) /* has target abort issues */
bus_dmamap_t sc_cddmamap; /* control data DMA map */
bus_addr_t sc_cddma;
/*
* software state for transmit and receive descriptors
*/
struct cas_txsoft sc_txsoft[CAS_TXQUEUELEN];
struct cas_rxdsoft sc_rxdsoft[CAS_NRXDESC];
/*
* control data structures
*/
struct cas_control_data *sc_control_data;
#define sc_txdescs sc_control_data->ccd_txdescs
#define sc_rxcomps sc_control_data->ccd_rxcomps
#define sc_rxdescs sc_control_data->ccd_rxdescs
#define sc_rxdescs2 sc_control_data->ccd_rxdescs2
u_int sc_txfree; /* number of free TX descriptors */
u_int sc_txnext; /* next ready TX descriptor */
u_int sc_txwin; /* TX desc. since last TX intr. */
struct cas_txsq sc_txfreeq; /* free software TX descriptors */
struct cas_txsq sc_txdirtyq; /* dirty software TX descriptors */
u_int sc_rxcptr; /* next ready RX completion */
u_int sc_rxdptr; /* next ready RX descriptor */
uint32_t sc_mac_rxcfg; /* RX MAC conf. % CAS_MAC_RX_CONF_EN */
int sc_ifflags;
};
#define CAS_BARRIER(sc, offs, len, flags) \
bus_barrier((sc)->sc_res[CAS_RES_MEM], (offs), (len), (flags))
#define CAS_READ_N(n, sc, offs) \
bus_read_ ## n((sc)->sc_res[CAS_RES_MEM], (offs))
#define CAS_READ_1(sc, offs) CAS_READ_N(1, (sc), (offs))
#define CAS_READ_2(sc, offs) CAS_READ_N(2, (sc), (offs))
#define CAS_READ_4(sc, offs) CAS_READ_N(4, (sc), (offs))
#define CAS_WRITE_N(n, sc, offs, v) \
bus_write_ ## n((sc)->sc_res[CAS_RES_MEM], (offs), (v))
#define CAS_WRITE_1(sc, offs, v) CAS_WRITE_N(1, (sc), (offs), (v))
#define CAS_WRITE_2(sc, offs, v) CAS_WRITE_N(2, (sc), (offs), (v))
#define CAS_WRITE_4(sc, offs, v) CAS_WRITE_N(4, (sc), (offs), (v))
#define CAS_CDTXDADDR(sc, x) ((sc)->sc_cddma + CAS_CDTXDOFF((x)))
#define CAS_CDRXCADDR(sc, x) ((sc)->sc_cddma + CAS_CDRXCOFF((x)))
#define CAS_CDRXDADDR(sc, x) ((sc)->sc_cddma + CAS_CDRXDOFF((x)))
#define CAS_CDRXD2ADDR(sc, x) ((sc)->sc_cddma + CAS_CDRXD2OFF((x)))
#define CAS_CDSYNC(sc, ops) \
bus_dmamap_sync((sc)->sc_cdmatag, (sc)->sc_cddmamap, (ops));
#define __CAS_UPDATE_RXDESC(rxd, rxds, s) \
do { \
\
refcount_init(&(rxds)->rxds_refcount, 1); \
(rxd)->cd_buf_ptr = htole64((rxds)->rxds_paddr); \
KASSERT((s) < CAS_RD_BUF_INDEX_MASK >> CAS_RD_BUF_INDEX_SHFT, \
("%s: RX buffer index too large!", __func__)); \
(rxd)->cd_flags = \
htole64((uint64_t)((s) << CAS_RD_BUF_INDEX_SHFT)); \
} while (0)
#define CAS_UPDATE_RXDESC(sc, d, s) \
__CAS_UPDATE_RXDESC(&(sc)->sc_rxdescs[(d)], \
&(sc)->sc_rxdsoft[(s)], (s))
#if __FreeBSD_version < 800016
#define CAS_INIT_RXDESC(sc, d, s) \
do { \
struct cas_rxdsoft *__rxds = &(sc)->sc_rxdsoft[(s)]; \
\
__rxds->rxds_sc = (sc); \
__rxds->rxds_idx = (s); \
__CAS_UPDATE_RXDESC(&(sc)->sc_rxdescs[(d)], __rxds, (s)); \
} while (0)
#else
#define CAS_INIT_RXDESC(sc, d, s) CAS_UPDATE_RXDESC(sc, d, s)
#endif
#define CAS_LOCK_INIT(_sc, _name) \
mtx_init(&(_sc)->sc_mtx, _name, MTX_NETWORK_LOCK, MTX_DEF)
#define CAS_LOCK(_sc) mtx_lock(&(_sc)->sc_mtx)
#define CAS_UNLOCK(_sc) mtx_unlock(&(_sc)->sc_mtx)
#define CAS_LOCK_ASSERT(_sc, _what) mtx_assert(&(_sc)->sc_mtx, (_what))
#define CAS_LOCK_DESTROY(_sc) mtx_destroy(&(_sc)->sc_mtx)
#define CAS_LOCK_OWNED(_sc) mtx_owned(&(_sc)->sc_mtx)
#endif