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/*-
* Copyright (C) 2001 Eduardo Horvath.
* 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
*
* $FreeBSD: release/9.1.0/sys/dev/gem/if_gemvar.h 223648 2011-06-28 16:16:43Z marius $
*/
#ifndef _IF_GEMVAR_H
#define _IF_GEMVAR_H
#include <sys/queue.h>
#include <sys/callout.h>
/*
* 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 GEM_NTXSEGS 16
#define GEM_TXQUEUELEN 64
#define GEM_NTXDESC (GEM_TXQUEUELEN * GEM_NTXSEGS)
#define GEM_MAXTXFREE (GEM_NTXDESC - 1)
#define GEM_NTXDESC_MASK (GEM_NTXDESC - 1)
#define GEM_NEXTTX(x) ((x + 1) & GEM_NTXDESC_MASK)
/*
* Receive descriptor ring size - we have one RX buffer per incoming
* packet, so this logic is a little simpler.
*/
#define GEM_NRXDESC 256
#define GEM_NRXDESC_MASK (GEM_NRXDESC - 1)
#define GEM_NEXTRX(x) ((x + 1) & GEM_NRXDESC_MASK)
/*
* How many ticks to wait until to retry on a RX descriptor that is
* still owned by the hardware.
*/
#define GEM_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 gem_control_data {
struct gem_desc gcd_txdescs[GEM_NTXDESC]; /* TX descriptors */
struct gem_desc gcd_rxdescs[GEM_NRXDESC]; /* RX descriptors */
};
#define GEM_CDOFF(x) offsetof(struct gem_control_data, x)
#define GEM_CDTXOFF(x) GEM_CDOFF(gcd_txdescs[(x)])
#define GEM_CDRXOFF(x) GEM_CDOFF(gcd_rxdescs[(x)])
/*
* software state for transmit job mbufs (may be elements of mbuf chains)
*/
struct gem_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(gem_txsoft) txs_q;
};
STAILQ_HEAD(gem_txsq, gem_txsoft);
/*
* software state for receive jobs
*/
struct gem_rxsoft {
struct mbuf *rxs_mbuf; /* head of our mbuf chain */
bus_dmamap_t rxs_dmamap; /* our DMA map */
bus_addr_t rxs_paddr; /* physical address of the segment */
};
/*
* software state per device
*/
struct gem_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 */
u_int sc_wdog_timer; /* watchdog timer */
void *sc_ih;
struct resource *sc_res[3];
#define GEM_RES_INTR 0
#define GEM_RES_BANK1 1
#define GEM_RES_BANK2 2
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 GEM_UNKNOWN 0 /* don't know */
#define GEM_SUN_GEM 1 /* Sun GEM */
#define GEM_SUN_ERI 2 /* Sun ERI */
#define GEM_APPLE_GMAC 3 /* Apple GMAC */
#define GEM_APPLE_K2_GMAC 4 /* Apple K2 GMAC */
#define GEM_IS_APPLE(sc) \
((sc)->sc_variant == GEM_APPLE_GMAC || \
(sc)->sc_variant == GEM_APPLE_K2_GMAC)
u_int sc_flags;
#define GEM_INITED (1 << 0) /* reset persistent regs init'ed */
#define GEM_LINK (1 << 1) /* link is up */
#define GEM_PCI (1 << 2) /* PCI busses are little-endian */
#define GEM_PCI66 (1 << 3) /* PCI bus runs at 66MHz */
#define GEM_SERDES (1 << 4) /* use the SERDES */
/*
* ring buffer DMA stuff
*/
bus_dmamap_t sc_cddmamap; /* control data DMA map */
bus_addr_t sc_cddma;
/*
* software state for transmit and receive descriptors
*/
struct gem_txsoft sc_txsoft[GEM_TXQUEUELEN];
struct gem_rxsoft sc_rxsoft[GEM_NRXDESC];
/*
* control data structures
*/
struct gem_control_data *sc_control_data;
#define sc_txdescs sc_control_data->gcd_txdescs
#define sc_rxdescs sc_control_data->gcd_rxdescs
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 gem_txsq sc_txfreeq; /* free TX descsofts */
struct gem_txsq sc_txdirtyq; /* dirty TX descsofts */
u_int sc_rxptr; /* next ready RX descriptor/state */
u_int sc_rxfifosize; /* RX FIFO size (bytes) */
uint32_t sc_mac_rxcfg; /* RX MAC conf. % GEM_MAC_RX_ENABLE */
int sc_ifflags;
u_long sc_csum_features;
};
#define GEM_BANKN_BARRIER(n, sc, offs, len, flags) \
bus_barrier((sc)->sc_res[(n)], (offs), (len), (flags))
#define GEM_BANK1_BARRIER(sc, offs, len, flags) \
GEM_BANKN_BARRIER(GEM_RES_BANK1, (sc), (offs), (len), (flags))
#define GEM_BANK2_BARRIER(sc, offs, len, flags) \
GEM_BANKN_BARRIER(GEM_RES_BANK2, (sc), (offs), (len), (flags))
#define GEM_BANKN_READ_M(n, m, sc, offs) \
bus_read_ ## m((sc)->sc_res[(n)], (offs))
#define GEM_BANK1_READ_1(sc, offs) \
GEM_BANKN_READ_M(GEM_RES_BANK1, 1, (sc), (offs))
#define GEM_BANK1_READ_2(sc, offs) \
GEM_BANKN_READ_M(GEM_RES_BANK1, 2, (sc), (offs))
#define GEM_BANK1_READ_4(sc, offs) \
GEM_BANKN_READ_M(GEM_RES_BANK1, 4, (sc), (offs))
#define GEM_BANK2_READ_1(sc, offs) \
GEM_BANKN_READ_M(GEM_RES_BANK2, 1, (sc), (offs))
#define GEM_BANK2_READ_2(sc, offs) \
GEM_BANKN_READ_M(GEM_RES_BANK2, 2, (sc), (offs))
#define GEM_BANK2_READ_4(sc, offs) \
GEM_BANKN_READ_M(GEM_RES_BANK2, 4, (sc), (offs))
#define GEM_BANKN_WRITE_M(n, m, sc, offs, v) \
bus_write_ ## m((sc)->sc_res[n], (offs), (v))
#define GEM_BANK1_WRITE_1(sc, offs, v) \
GEM_BANKN_WRITE_M(GEM_RES_BANK1, 1, (sc), (offs), (v))
#define GEM_BANK1_WRITE_2(sc, offs, v) \
GEM_BANKN_WRITE_M(GEM_RES_BANK1, 2, (sc), (offs), (v))
#define GEM_BANK1_WRITE_4(sc, offs, v) \
GEM_BANKN_WRITE_M(GEM_RES_BANK1, 4, (sc), (offs), (v))
#define GEM_BANK2_WRITE_1(sc, offs, v) \
GEM_BANKN_WRITE_M(GEM_RES_BANK2, 1, (sc), (offs), (v))
#define GEM_BANK2_WRITE_2(sc, offs, v) \
GEM_BANKN_WRITE_M(GEM_RES_BANK2, 2, (sc), (offs), (v))
#define GEM_BANK2_WRITE_4(sc, offs, v) \
GEM_BANKN_WRITE_M(GEM_RES_BANK2, 4, (sc), (offs), (v))
/* XXX this should be handled by bus_dma(9). */
#define GEM_DMA_READ(sc, v) \
((((sc)->sc_flags & GEM_PCI) != 0) ? le64toh(v) : be64toh(v))
#define GEM_DMA_WRITE(sc, v) \
((((sc)->sc_flags & GEM_PCI) != 0) ? htole64(v) : htobe64(v))
#define GEM_CDTXADDR(sc, x) ((sc)->sc_cddma + GEM_CDTXOFF((x)))
#define GEM_CDRXADDR(sc, x) ((sc)->sc_cddma + GEM_CDRXOFF((x)))
#define GEM_CDSYNC(sc, ops) \
bus_dmamap_sync((sc)->sc_cdmatag, (sc)->sc_cddmamap, (ops));
#define GEM_INIT_RXDESC(sc, x) \
do { \
struct gem_rxsoft *__rxs = &sc->sc_rxsoft[(x)]; \
struct gem_desc *__rxd = &sc->sc_rxdescs[(x)]; \
struct mbuf *__m = __rxs->rxs_mbuf; \
\
__m->m_data = __m->m_ext.ext_buf; \
__rxd->gd_addr = \
GEM_DMA_WRITE((sc), __rxs->rxs_paddr); \
__rxd->gd_flags = GEM_DMA_WRITE((sc), \
(((__m->m_ext.ext_size) << GEM_RD_BUFSHIFT) & \
GEM_RD_BUFSIZE) | GEM_RD_OWN); \
} while (0)
#define GEM_UPDATE_RXDESC(sc, x) \
do { \
struct gem_rxsoft *__rxs = &sc->sc_rxsoft[(x)]; \
struct gem_desc *__rxd = &sc->sc_rxdescs[(x)]; \
struct mbuf *__m = __rxs->rxs_mbuf; \
\
__rxd->gd_flags = GEM_DMA_WRITE((sc), \
(((__m->m_ext.ext_size) << GEM_RD_BUFSHIFT) & \
GEM_RD_BUFSIZE) | GEM_RD_OWN); \
} while (0)
#define GEM_LOCK_INIT(_sc, _name) \
mtx_init(&(_sc)->sc_mtx, _name, MTX_NETWORK_LOCK, MTX_DEF)
#define GEM_LOCK(_sc) mtx_lock(&(_sc)->sc_mtx)
#define GEM_UNLOCK(_sc) mtx_unlock(&(_sc)->sc_mtx)
#define GEM_LOCK_ASSERT(_sc, _what) mtx_assert(&(_sc)->sc_mtx, (_what))
#define GEM_LOCK_DESTROY(_sc) mtx_destroy(&(_sc)->sc_mtx)
#ifdef _KERNEL
extern devclass_t gem_devclass;
int gem_attach(struct gem_softc *sc);
void gem_detach(struct gem_softc *sc);
void gem_intr(void *v);
void gem_resume(struct gem_softc *sc);
void gem_suspend(struct gem_softc *sc);
int gem_mediachange(struct ifnet *ifp);
void gem_mediastatus(struct ifnet *ifp, struct ifmediareq *ifmr);
/* MII methods & callbacks */
int gem_mii_readreg(device_t dev, int phy, int reg);
void gem_mii_statchg(device_t dev);
int gem_mii_writereg(device_t dev, int phy, int reg, int val);
#endif /* _KERNEL */
#endif