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/* $OpenBSD: gemvar.h,v 1.32 2024/05/13 01:15:50 jsg Exp $ */
/* $NetBSD: gemvar.h,v 1.1 2001/09/16 00:11:43 eeh Exp $ */
/*
*
* 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.
*
*/
#ifndef _IF_GEMVAR_H
#define _IF_GEMVAR_H
#include <sys/queue.h>
#include <sys/timeout.h>
/*
* Misc. definitions for the Sun ``Gem'' Ethernet controller family driver.
*/
/*
* Transmit descriptor list size. This is arbitrary, but allocate
* enough descriptors for 64 pending transmissions and 16 segments
* per packet.
*/
#define GEM_NTXSEGS 16
#define GEM_TXQUEUELEN 64
#define GEM_NTXDESC (GEM_TXQUEUELEN * GEM_NTXSEGS)
#define GEM_NTXDESC_MASK (GEM_NTXDESC - 1)
#define GEM_NEXTTX(x) ((x + 1) & GEM_NTXDESC_MASK)
struct gem_sxd {
struct mbuf *sd_mbuf;
bus_dmamap_t sd_map;
};
/*
* Receive descriptor list size. We have one Rx buffer per incoming
* packet, so this logic is a little simpler.
*/
#define GEM_NRXDESC 128
#define GEM_NRXDESC_MASK (GEM_NRXDESC - 1)
#define GEM_NEXTRX(x) ((x + 1) & GEM_NRXDESC_MASK)
/*
* Control structures are DMA'd to the GEM chip. We allocate them in
* a single clump that maps to a single DMA segment to make several things
* easier.
*/
struct gem_control_data {
/*
* The transmit descriptors.
*/
struct gem_desc gcd_txdescs[GEM_NTXDESC];
/*
* The receive descriptors.
*/
struct gem_desc gcd_rxdescs[GEM_NRXDESC];
};
#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 receive jobs.
*/
struct gem_rxsoft {
struct mbuf *rxs_mbuf; /* head of our mbuf chain */
bus_dmamap_t rxs_dmamap; /* our DMA map */
};
/*
* Table which describes the transmit threshold mode. We generally
* start at index 0. Whenever we get a transmit underrun, we increment
* our index, falling back if we encounter the NULL terminator.
*/
struct gem_txthresh_tab {
u_int32_t txth_opmode; /* OPMODE bits */
const char *txth_name; /* name of mode */
};
/*
* Some misc. statics, useful for debugging.
*/
struct gem_stats {
u_long ts_tx_uf; /* transmit underflow errors */
u_long ts_tx_to; /* transmit jabber timeouts */
u_long ts_tx_ec; /* excessive collision count */
u_long ts_tx_lc; /* late collision count */
};
/*
* Software state per device.
*/
struct gem_softc {
struct device sc_dev; /* generic device information */
struct arpcom sc_arpcom; /* ethernet common data */
struct mii_data sc_mii; /* MII media control */
#define sc_media sc_mii.mii_media/* shorthand */
struct timeout sc_tick_ch; /* tick callout */
void *sc_ih; /* interrupt handler */
/* The following bus handles are to be provided by the bus front-end */
bus_space_tag_t sc_bustag; /* bus tag */
bus_dma_tag_t sc_dmatag; /* bus dma tag */
bus_dmamap_t sc_dmamap; /* bus dma handle */
bus_space_handle_t sc_h1; /* bus space handle for bank 1 regs */
bus_space_handle_t sc_h2; /* bus space handle for bank 2 regs */
#if 0
/* The following may be needed for SBus */
bus_space_handle_t sc_seb; /* HME Global registers */
bus_space_handle_t sc_erx; /* HME ERX registers */
bus_space_handle_t sc_etx; /* HME ETX registers */
bus_space_handle_t sc_mac; /* HME MAC registers */
bus_space_handle_t sc_mif; /* HME MIF registers */
#endif
int sc_burst; /* DVMA burst size in effect */
int sc_mif_config; /* Selected MII reg setting */
int sc_pci; /* XXXXX -- PCI buses are LE. */
u_int sc_variant; /* which GEM are we dealing with? */
#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_GIGABIT 0x0001 /* has a gigabit PHY */
struct gem_stats sc_stats; /* debugging stats */
/*
* Ring buffer DMA stuff.
*/
bus_dma_segment_t sc_cdseg; /* control data memory */
int sc_cdnseg; /* number of segments */
bus_dmamap_t sc_cddmamap; /* control data DMA map */
#define sc_cddma sc_cddmamap->dm_segs[0].ds_addr
/*
* Software state for transmit and receive descriptors.
*/
struct gem_sxd sc_txd[GEM_NTXDESC];
u_int32_t sc_tx_cnt, sc_tx_prod, sc_tx_cons;
struct gem_rxsoft sc_rxsoft[GEM_NRXDESC];
struct if_rxring sc_rx_ring;
u_int32_t sc_rx_prod, sc_rx_cons;
/*
* 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
int sc_txfree; /* number of free Tx descriptors */
int sc_txnext; /* next ready Tx descriptor */
u_int32_t sc_tdctl_ch; /* conditional desc chaining */
u_int32_t sc_tdctl_er; /* conditional desc end-of-ring */
u_int32_t sc_setup_fsls; /* FS|LS on setup descriptor */
int sc_rxfifosize;
u_int32_t sc_rx_fifo_wr_ptr;
u_int32_t sc_rx_fifo_rd_ptr;
struct timeout sc_rx_watchdog;
/* ========== */
int sc_inited;
int sc_debug;
/* Special hardware hooks */
void (*sc_hwreset)(struct gem_softc *);
void (*sc_hwinit)(struct gem_softc *);
};
#define GEM_DMA_READ(_sc, _a) \
(((_sc)->sc_pci) ? lemtoh64(_a) : bemtoh64(_a))
#define GEM_DMA_WRITE(_sc, _a, _v) \
(((_sc)->sc_pci) ? htolem64((_a), (_v)) : htobem64((_a), (_v)))
/*
* This macro determines if a change to media-related OPMODE bits requires
* a chip reset.
*/
#define GEM_MEDIA_NEEDSRESET(sc, newbits) \
(((sc)->sc_opmode & OPMODE_MEDIA_BITS) != \
((newbits) & OPMODE_MEDIA_BITS))
#define GEM_CDTXADDR(sc, x) ((sc)->sc_cddma + GEM_CDTXOFF((x)))
#define GEM_CDRXADDR(sc, x) ((sc)->sc_cddma + GEM_CDRXOFF((x)))
#define GEM_CDSPADDR(sc) ((sc)->sc_cddma + GEM_CDSPOFF)
#define GEM_CDTXSYNC(sc, x, n, ops) \
do { \
int __x, __n; \
\
__x = (x); \
__n = (n); \
\
/* If it will wrap around, sync to the end of the ring. */ \
if ((__x + __n) > GEM_NTXDESC) { \
bus_dmamap_sync((sc)->sc_dmatag, (sc)->sc_cddmamap, \
GEM_CDTXOFF(__x), sizeof(struct gem_desc) * \
(GEM_NTXDESC - __x), (ops)); \
__n -= (GEM_NTXDESC - __x); \
__x = 0; \
} \
\
/* Now sync whatever is left. */ \
bus_dmamap_sync((sc)->sc_dmatag, (sc)->sc_cddmamap, \
GEM_CDTXOFF(__x), sizeof(struct gem_desc) * __n, (ops)); \
} while (0)
#define GEM_CDRXSYNC(sc, x, ops) \
bus_dmamap_sync((sc)->sc_dmatag, (sc)->sc_cddmamap, \
GEM_CDRXOFF((x)), sizeof(struct gem_desc), (ops))
#define GEM_CDSPSYNC(sc, ops) \
bus_dmamap_sync((sc)->sc_dmatag, (sc)->sc_cddmamap, \
GEM_CDSPOFF, GEM_SETUP_PACKET_LEN, (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; \
\
GEM_DMA_WRITE((sc), &__rxd->gd_addr, \
__rxs->rxs_dmamap->dm_segs[0].ds_addr); \
GEM_DMA_WRITE((sc), &__rxd->gd_flags, \
(((__m->m_ext.ext_size)<<GEM_RD_BUFSHIFT) \
& GEM_RD_BUFSIZE) | GEM_RD_OWN); \
GEM_CDRXSYNC((sc), (x), BUS_DMASYNC_PREREAD|BUS_DMASYNC_PREWRITE); \
} while (0)
#ifdef _KERNEL
int gem_intr(void *);
int gem_mediachange(struct ifnet *);
void gem_mediastatus(struct ifnet *, struct ifmediareq *);
void gem_config(struct gem_softc *);
void gem_unconfig(struct gem_softc *);
void gem_reset(struct gem_softc *);
int gem_intr(void *);
#endif /* _KERNEL */
#endif
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