/* $NetBSD: if_mec.c,v 1.65 2023/12/20 15:29:07 thorpej Exp $ */
/*-
* Copyright (c) 2004, 2008 Izumi Tsutsui. 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.
*/
/*
* Copyright (c) 2003 Christopher SEKIYA
* 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.
* 3. All advertising materials mentioning features or use of this software
* must display the following acknowledgement:
* This product includes software developed for the
* NetBSD Project. See
http://www.NetBSD.org/ for
* information about NetBSD.
* 4. The name of the author may not be used to endorse or promote products
* derived from this software without specific prior written permission.
*
* 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.
*/
/*
* MACE MAC-110 Ethernet driver
*/
#include <sys/cdefs.h>
__KERNEL_RCSID(0, "$NetBSD: if_mec.c,v 1.65 2023/12/20 15:29:07 thorpej Exp $");
#include "opt_ddb.h"
#include <sys/param.h>
#include <sys/systm.h>
#include <sys/device.h>
#include <sys/callout.h>
#include <sys/mbuf.h>
#include <sys/kernel.h>
#include <sys/socket.h>
#include <sys/ioctl.h>
#include <sys/errno.h>
#include <sys/rndsource.h>
#include <net/if.h>
#include <net/if_dl.h>
#include <net/if_media.h>
#include <net/if_ether.h>
#include <netinet/in.h>
#include <netinet/in_systm.h>
#include <netinet/ip.h>
#include <netinet/tcp.h>
#include <netinet/udp.h>
#include <net/bpf.h>
#include <sys/bus.h>
#include <machine/intr.h>
#include <machine/machtype.h>
#include <dev/mii/mii.h>
#include <dev/mii/miivar.h>
#include <sgimips/mace/macevar.h>
#include <sgimips/mace/if_mecreg.h>
#include <dev/arcbios/arcbios.h>
#include <dev/arcbios/arcbiosvar.h>
/* #define MEC_DEBUG */
#ifdef MEC_DEBUG
#define MEC_DEBUG_RESET 0x01
#define MEC_DEBUG_START 0x02
#define MEC_DEBUG_STOP 0x04
#define MEC_DEBUG_INTR 0x08
#define MEC_DEBUG_RXINTR 0x10
#define MEC_DEBUG_TXINTR 0x20
#define MEC_DEBUG_TXSEGS 0x40
uint32_t mec_debug = 0;
#define DPRINTF(x, y) if (mec_debug & (x)) printf y
#else
#define DPRINTF(x, y) /* nothing */
#endif
/* #define MEC_EVENT_COUNTERS */
#ifdef MEC_EVENT_COUNTERS
#define MEC_EVCNT_INCR(ev) (ev)->ev_count++
#else
#define MEC_EVCNT_INCR(ev) do {} while (/* CONSTCOND */ 0)
#endif
/*
* Transmit descriptor list size
*/
#define MEC_NTXDESC 64
#define MEC_NTXDESC_MASK (MEC_NTXDESC - 1)
#define MEC_NEXTTX(x) (((x) + 1) & MEC_NTXDESC_MASK)
#define MEC_NTXDESC_RSVD 4
#define MEC_NTXDESC_INTR 8
/*
* software state for TX
*/
struct mec_txsoft {
struct mbuf *txs_mbuf; /* head of our mbuf chain */
bus_dmamap_t txs_dmamap; /* our DMA map */
uint32_t txs_flags;
#define MEC_TXS_BUFLEN_MASK 0x0000007f /* data len in txd_buf */
#define MEC_TXS_TXDPTR 0x00000080 /* concat txd_ptr is used */
};
/*
* Transmit buffer descriptor
*/
#define MEC_TXDESCSIZE 128
#define MEC_NTXPTR 3
#define MEC_TXD_BUFOFFSET sizeof(uint64_t)
#define MEC_TXD_BUFOFFSET1 \
(sizeof(uint64_t) + sizeof(uint64_t) * MEC_NTXPTR)
#define MEC_TXD_BUFSIZE (MEC_TXDESCSIZE - MEC_TXD_BUFOFFSET)
#define MEC_TXD_BUFSIZE1 (MEC_TXDESCSIZE - MEC_TXD_BUFOFFSET1)
#define MEC_TXD_BUFSTART(len) (MEC_TXD_BUFSIZE - (len))
#define MEC_TXD_ALIGN 8
#define MEC_TXD_ALIGNMASK (MEC_TXD_ALIGN - 1)
#define MEC_TXD_ROUNDUP(addr) \
(((addr) + MEC_TXD_ALIGNMASK) & ~(uint64_t)MEC_TXD_ALIGNMASK)
#define MEC_NTXSEG 16
struct mec_txdesc {
volatile uint64_t txd_cmd;
#define MEC_TXCMD_DATALEN 0x000000000000ffff /* data length */
#define MEC_TXCMD_BUFSTART 0x00000000007f0000 /* start byte offset */
#define TXCMD_BUFSTART(x) ((x) << 16)
#define MEC_TXCMD_TERMDMA 0x0000000000800000 /* stop DMA on abort */
#define MEC_TXCMD_TXINT 0x0000000001000000 /* INT after TX done */
#define MEC_TXCMD_PTR1 0x0000000002000000 /* valid 1st txd_ptr */
#define MEC_TXCMD_PTR2 0x0000000004000000 /* valid 2nd txd_ptr */
#define MEC_TXCMD_PTR3 0x0000000008000000 /* valid 3rd txd_ptr */
#define MEC_TXCMD_UNUSED 0xfffffffff0000000ULL /* should be zero */
#define txd_stat txd_cmd
#define MEC_TXSTAT_LEN 0x000000000000ffff /* TX length */
#define MEC_TXSTAT_COLCNT 0x00000000000f0000 /* collision count */
#define MEC_TXSTAT_COLCNT_SHIFT 16
#define MEC_TXSTAT_LATE_COL 0x0000000000100000 /* late collision */
#define MEC_TXSTAT_CRCERROR 0x0000000000200000 /* */
#define MEC_TXSTAT_DEFERRED 0x0000000000400000 /* */
#define MEC_TXSTAT_SUCCESS 0x0000000000800000 /* TX complete */
#define MEC_TXSTAT_TOOBIG 0x0000000001000000 /* */
#define MEC_TXSTAT_UNDERRUN 0x0000000002000000 /* */
#define MEC_TXSTAT_COLLISIONS 0x0000000004000000 /* */
#define MEC_TXSTAT_EXDEFERRAL 0x0000000008000000 /* */
#define MEC_TXSTAT_COLLIDED 0x0000000010000000 /* */
#define MEC_TXSTAT_UNUSED 0x7fffffffe0000000ULL /* should be zero */
#define MEC_TXSTAT_SENT 0x8000000000000000ULL /* packet sent */
union {
uint64_t txptr[MEC_NTXPTR];
#define MEC_TXPTR_UNUSED2 0x0000000000000007 /* should be zero */
#define MEC_TXPTR_DMAADDR 0x00000000fffffff8 /* TX DMA address */
#define MEC_TXPTR_LEN 0x0000ffff00000000ULL /* buffer length */
#define TXPTR_LEN(x) ((uint64_t)(x) << 32)
#define MEC_TXPTR_UNUSED1 0xffff000000000000ULL /* should be zero */
uint8_t txbuf[MEC_TXD_BUFSIZE];
} txd_data;
#define txd_ptr txd_data.txptr
#define txd_buf txd_data.txbuf
};
/*
* Receive buffer size
*/
#define MEC_NRXDESC 16
#define MEC_NRXDESC_MASK (MEC_NRXDESC - 1)
#define MEC_NEXTRX(x) (((x) + 1) & MEC_NRXDESC_MASK)
/*
* Receive buffer description
*/
#define MEC_RXDESCSIZE 4096 /* umm, should be 4kbyte aligned */
#define MEC_RXD_NRXPAD 3
#define MEC_RXD_DMAOFFSET (1 + MEC_RXD_NRXPAD)
#define MEC_RXD_BUFOFFSET (MEC_RXD_DMAOFFSET * sizeof(uint64_t))
#define MEC_RXD_BUFSIZE (MEC_RXDESCSIZE - MEC_RXD_BUFOFFSET)
struct mec_rxdesc {
volatile uint64_t rxd_stat;
#define MEC_RXSTAT_LEN 0x000000000000ffff /* data length */
#define MEC_RXSTAT_VIOLATION 0x0000000000010000 /* code violation (?) */
#define MEC_RXSTAT_UNUSED2 0x0000000000020000 /* unknown (?) */
#define MEC_RXSTAT_CRCERROR 0x0000000000040000 /* CRC error */
#define MEC_RXSTAT_MULTICAST 0x0000000000080000 /* multicast packet */
#define MEC_RXSTAT_BROADCAST 0x0000000000100000 /* broadcast packet */
#define MEC_RXSTAT_INVALID 0x0000000000200000 /* invalid preamble */
#define MEC_RXSTAT_LONGEVENT 0x0000000000400000 /* long packet */
#define MEC_RXSTAT_BADPACKET 0x0000000000800000 /* bad packet */
#define MEC_RXSTAT_CAREVENT 0x0000000001000000 /* carrier event */
#define MEC_RXSTAT_MATCHMCAST 0x0000000002000000 /* match multicast */
#define MEC_RXSTAT_MATCHMAC 0x0000000004000000 /* match MAC */
#define MEC_RXSTAT_SEQNUM 0x00000000f8000000 /* sequence number */
#define MEC_RXSTAT_CKSUM 0x0000ffff00000000ULL /* IP checksum */
#define RXSTAT_CKSUM(x) (((uint64_t)(x) & MEC_RXSTAT_CKSUM) >> 32)
#define MEC_RXSTAT_UNUSED1 0x7fff000000000000ULL /* should be zero */
#define MEC_RXSTAT_RECEIVED 0x8000000000000000ULL /* set to 1 on RX */
uint64_t rxd_pad1[MEC_RXD_NRXPAD];
uint8_t rxd_buf[MEC_RXD_BUFSIZE];
};
/*
* control structures for DMA ops
*/
struct mec_control_data {
/*
* TX descriptors and buffers
*/
struct mec_txdesc mcd_txdesc[MEC_NTXDESC];
/*
* RX descriptors and buffers
*/
struct mec_rxdesc mcd_rxdesc[MEC_NRXDESC];
};
/*
* It _seems_ there are some restrictions on descriptor address:
*
* - Base address of txdescs should be 8kbyte aligned
* - Each txdesc should be 128byte aligned
* - Each rxdesc should be 4kbyte aligned
*
* So we should specify 8k align to allocalte txdescs.
* In this case, sizeof(struct mec_txdesc) * MEC_NTXDESC is 8192
* so rxdescs are also allocated at 4kbyte aligned.
*/
#define MEC_CONTROL_DATA_ALIGN (8 * 1024)
#define MEC_CDOFF(x) offsetof(struct mec_control_data, x)
#define MEC_CDTXOFF(x) MEC_CDOFF(mcd_txdesc[(x)])
#define MEC_CDRXOFF(x) MEC_CDOFF(mcd_rxdesc[(x)])
/*
* software state per device
*/
struct mec_softc {
device_t sc_dev; /* generic device structures */
bus_space_tag_t sc_st; /* bus_space tag */
bus_space_handle_t sc_sh; /* bus_space handle */
bus_dma_tag_t sc_dmat; /* bus_dma tag */
struct ethercom sc_ethercom; /* Ethernet common part */
struct mii_data sc_mii; /* MII/media information */
int sc_phyaddr; /* MII address */
struct callout sc_tick_ch; /* tick callout */
uint8_t sc_enaddr[ETHER_ADDR_LEN]; /* MAC address */
bus_dmamap_t sc_cddmamap; /* bus_dma map for control data */
#define sc_cddma sc_cddmamap->dm_segs[0].ds_addr
/* pointer to allocated control data */
struct mec_control_data *sc_control_data;
#define sc_txdesc sc_control_data->mcd_txdesc
#define sc_rxdesc sc_control_data->mcd_rxdesc
/* software state for TX descs */
struct mec_txsoft sc_txsoft[MEC_NTXDESC];
int sc_txpending; /* number of TX requests pending */
int sc_txdirty; /* first dirty TX descriptor */
int sc_txlast; /* last used TX descriptor */
int sc_rxptr; /* next ready RX buffer */
krndsource_t sc_rnd_source; /* random source */
#ifdef MEC_EVENT_COUNTERS
struct evcnt sc_ev_txpkts; /* TX packets queued total */
struct evcnt sc_ev_txdpad; /* TX packets padded in txdesc buf */
struct evcnt sc_ev_txdbuf; /* TX packets copied to txdesc buf */
struct evcnt sc_ev_txptr1; /* TX packets using concat ptr1 */
struct evcnt sc_ev_txptr1a; /* TX packets w/ptr1 ~160bytes */
struct evcnt sc_ev_txptr1b; /* TX packets w/ptr1 ~256bytes */
struct evcnt sc_ev_txptr1c; /* TX packets w/ptr1 ~512bytes */
struct evcnt sc_ev_txptr1d; /* TX packets w/ptr1 ~1024bytes */
struct evcnt sc_ev_txptr1e; /* TX packets w/ptr1 >1024bytes */
struct evcnt sc_ev_txptr2; /* TX packets using concat ptr1,2 */
struct evcnt sc_ev_txptr2a; /* TX packets w/ptr2 ~160bytes */
struct evcnt sc_ev_txptr2b; /* TX packets w/ptr2 ~256bytes */
struct evcnt sc_ev_txptr2c; /* TX packets w/ptr2 ~512bytes */
struct evcnt sc_ev_txptr2d; /* TX packets w/ptr2 ~1024bytes */
struct evcnt sc_ev_txptr2e; /* TX packets w/ptr2 >1024bytes */
struct evcnt sc_ev_txptr3; /* TX packets using concat ptr1,2,3 */
struct evcnt sc_ev_txptr3a; /* TX packets w/ptr3 ~160bytes */
struct evcnt sc_ev_txptr3b; /* TX packets w/ptr3 ~256bytes */
struct evcnt sc_ev_txptr3c; /* TX packets w/ptr3 ~512bytes */
struct evcnt sc_ev_txptr3d; /* TX packets w/ptr3 ~1024bytes */
struct evcnt sc_ev_txptr3e; /* TX packets w/ptr3 >1024bytes */
struct evcnt sc_ev_txmbuf; /* TX packets copied to new mbufs */
struct evcnt sc_ev_txmbufa; /* TX packets w/mbuf ~160bytes */
struct evcnt sc_ev_txmbufb; /* TX packets w/mbuf ~256bytes */
struct evcnt sc_ev_txmbufc; /* TX packets w/mbuf ~512bytes */
struct evcnt sc_ev_txmbufd; /* TX packets w/mbuf ~1024bytes */
struct evcnt sc_ev_txmbufe; /* TX packets w/mbuf >1024bytes */
struct evcnt sc_ev_txptrs; /* TX packets using ptrs total */
struct evcnt sc_ev_txptrc0; /* TX packets w/ptrs no hdr chain */
struct evcnt sc_ev_txptrc1; /* TX packets w/ptrs 1 hdr chain */
struct evcnt sc_ev_txptrc2; /* TX packets w/ptrs 2 hdr chains */
struct evcnt sc_ev_txptrc3; /* TX packets w/ptrs 3 hdr chains */
struct evcnt sc_ev_txptrc4; /* TX packets w/ptrs 4 hdr chains */
struct evcnt sc_ev_txptrc5; /* TX packets w/ptrs 5 hdr chains */
struct evcnt sc_ev_txptrc6; /* TX packets w/ptrs >5 hdr chains */
struct evcnt sc_ev_txptrh0; /* TX packets w/ptrs ~8bytes hdr */
struct evcnt sc_ev_txptrh1; /* TX packets w/ptrs ~16bytes hdr */
struct evcnt sc_ev_txptrh2; /* TX packets w/ptrs ~32bytes hdr */
struct evcnt sc_ev_txptrh3; /* TX packets w/ptrs ~64bytes hdr */
struct evcnt sc_ev_txptrh4; /* TX packets w/ptrs ~80bytes hdr */
struct evcnt sc_ev_txptrh5; /* TX packets w/ptrs ~96bytes hdr */
struct evcnt sc_ev_txdstall; /* TX stalled due to no txdesc */
struct evcnt sc_ev_txempty; /* TX empty interrupts */
struct evcnt sc_ev_txsent; /* TX sent interrupts */
#endif
};
#define MEC_CDTXADDR(sc, x) ((sc)->sc_cddma + MEC_CDTXOFF(x))
#define MEC_CDRXADDR(sc, x) ((sc)->sc_cddma + MEC_CDRXOFF(x))
#define MEC_TXDESCSYNC(sc, x, ops) \
bus_dmamap_sync((sc)->sc_dmat, (sc)->sc_cddmamap, \
MEC_CDTXOFF(x), MEC_TXDESCSIZE, (ops))
#define MEC_TXCMDSYNC(sc, x, ops) \
bus_dmamap_sync((sc)->sc_dmat, (sc)->sc_cddmamap, \
MEC_CDTXOFF(x), sizeof(uint64_t), (ops))
#define MEC_RXSTATSYNC(sc, x, ops) \
bus_dmamap_sync((sc)->sc_dmat, (sc)->sc_cddmamap, \
MEC_CDRXOFF(x), sizeof(uint64_t), (ops))
#define MEC_RXBUFSYNC(sc, x, len, ops) \
bus_dmamap_sync((sc)->sc_dmat, (sc)->sc_cddmamap, \
MEC_CDRXOFF(x) + MEC_RXD_BUFOFFSET, \
MEC_ETHER_ALIGN + (len), (ops))
/* XXX these values should be moved to <net/if_ether.h> ? */
#define ETHER_PAD_LEN (ETHER_MIN_LEN - ETHER_CRC_LEN)
#define MEC_ETHER_ALIGN 2
static int mec_match(device_t, cfdata_t, void *);
static void mec_attach(device_t, device_t, void *);
static int mec_mii_readreg(device_t, int, int, uint16_t *);
static int mec_mii_writereg(device_t, int, int, uint16_t);
static int mec_mii_wait(struct mec_softc *);
static void mec_statchg(struct ifnet *);
static int mec_init(struct ifnet * ifp);
static void mec_start(struct ifnet *);
static void mec_watchdog(struct ifnet *);
static void mec_tick(void *);
static int mec_ioctl(struct ifnet *, u_long, void *);
static void mec_reset(struct mec_softc *);
static void mec_setfilter(struct mec_softc *);
static int mec_intr(void *arg);
static void mec_stop(struct ifnet *, int);
static void mec_rxintr(struct mec_softc *);
static void mec_rxcsum(struct mec_softc *, struct mbuf *, uint16_t,
uint32_t);
static void mec_txintr(struct mec_softc *, uint32_t);
static bool mec_shutdown(device_t, int);
CFATTACH_DECL_NEW(mec, sizeof(struct mec_softc),
mec_match, mec_attach, NULL, NULL);
static int mec_matched = 0;
static int
mec_match(device_t parent, cfdata_t cf, void *aux)
{
/* allow only one device */
if (mec_matched)
return 0;
mec_matched = 1;
return 1;
}
static void
mec_attach(device_t parent, device_t self, void *aux)
{
struct mec_softc *sc = device_private(self);
struct mace_attach_args *maa = aux;
struct ifnet *ifp = &sc->sc_ethercom.ec_if;
struct mii_data *mii = &sc->sc_mii;
uint64_t address, command;
const char *macaddr;
struct mii_softc *child;
bus_dma_segment_t seg;
int i, err, rseg;
bool mac_is_fake;
sc->sc_dev = self;
sc->sc_st = maa->maa_st;
if (bus_space_subregion(sc->sc_st, maa->maa_sh,
maa->maa_offset, 0, &sc->sc_sh) != 0) {
aprint_error(": can't map i/o space\n");
return;
}
/* set up DMA structures */
sc->sc_dmat = maa->maa_dmat;
/*
* Allocate the control data structures, and create and load the
* DMA map for it.
*/
if ((err = bus_dmamem_alloc(sc->sc_dmat,
sizeof(struct mec_control_data), MEC_CONTROL_DATA_ALIGN, 0,
&seg, 1, &rseg, BUS_DMA_NOWAIT)) != 0) {
aprint_error(": unable to allocate control data, error = %d\n",
err);
goto fail_0;
}
/*
* XXX needs re-think...
* control data structures contain whole RX data buffer, so
* BUS_DMA_COHERENT (which disables cache) may cause some performance
* issue on copying data from the RX buffer to mbuf on normal memory,
* though we have to make sure all bus_dmamap_sync(9) ops are called
* properly in that case.
*/
if ((err = bus_dmamem_map(sc->sc_dmat, &seg, rseg,
sizeof(struct mec_control_data),
(void **)&sc->sc_control_data, /*BUS_DMA_COHERENT*/ 0)) != 0) {
aprint_error(": unable to map control data, error = %d\n", err);
goto fail_1;
}
memset(sc->sc_control_data, 0, sizeof(struct mec_control_data));
if ((err = bus_dmamap_create(sc->sc_dmat,
sizeof(struct mec_control_data), 1,
sizeof(struct mec_control_data), 0, 0, &sc->sc_cddmamap)) != 0) {
aprint_error(": unable to create control data DMA map,"
" error = %d\n", err);
goto fail_2;
}
if ((err = bus_dmamap_load(sc->sc_dmat, sc->sc_cddmamap,
sc->sc_control_data, sizeof(struct mec_control_data), NULL,
BUS_DMA_NOWAIT)) != 0) {
aprint_error(": unable to load control data DMA map,"
" error = %d\n", err);
goto fail_3;
}
/* create TX buffer DMA maps */
for (i = 0; i < MEC_NTXDESC; i++) {
if ((err = bus_dmamap_create(sc->sc_dmat,
MCLBYTES, MEC_NTXSEG, MCLBYTES, PAGE_SIZE, 0,
&sc->sc_txsoft[i].txs_dmamap)) != 0) {
aprint_error(": unable to create tx DMA map %d,"
" error = %d\n", i, err);
goto fail_4;
}
}
callout_init(&sc->sc_tick_ch, 0);
/* get Ethernet address from ARCBIOS */
if ((macaddr = arcbios_GetEnvironmentVariable("eaddr")) == NULL) {
aprint_error(": unable to get MAC address!\n");
goto fail_4;
}
/*
* On some machines the DS2502 chip storing the serial number/
* mac address is on the pci riser board - if this board is
* missing, ARCBIOS will not know a good ethernet address (but
* otherwise the machine will work fine).
*/
mac_is_fake = false;
if (strcmp(macaddr, "ff:ff:ff:ff:ff:ff") == 0) {
uint32_t ui = 0;
const char * netaddr =
arcbios_GetEnvironmentVariable("netaddr");
/*
* Create a MAC address by abusing the "netaddr" env var
*/
sc->sc_enaddr[0] = 0xf2;
sc->sc_enaddr[1] = 0x0b;
sc->sc_enaddr[2] = 0xa4;
if (netaddr) {
mac_is_fake = true;
while (*netaddr) {
int v = 0;
while (*netaddr && *netaddr != '.') {
if (*netaddr >= '0' && *netaddr <= '9')
v = v*10 + (*netaddr - '0');
netaddr++;
}
ui <<= 8;
ui |= v;
if (*netaddr == '.')
netaddr++;
}
}
memcpy(sc->sc_enaddr+3, ((uint8_t *)&ui)+1, 3);
}
if (!mac_is_fake)
ether_aton_r(sc->sc_enaddr, sizeof(sc->sc_enaddr), macaddr);
/* set the Ethernet address */
address = 0;
for (i = 0; i < ETHER_ADDR_LEN; i++) {
address = address << 8;
address |= sc->sc_enaddr[i];
}
bus_space_write_8(sc->sc_st, sc->sc_sh, MEC_STATION, address);
/* reset device */
mec_reset(sc);
command = bus_space_read_8(sc->sc_st, sc->sc_sh, MEC_MAC_CONTROL);
aprint_normal(": MAC-110 Ethernet, rev %u\n",
(u_int)((command & MEC_MAC_REVISION) >> MEC_MAC_REVISION_SHIFT));
if (mac_is_fake)
aprint_normal_dev(self,
"could not get ethernet address from firmware"
" - generated one from the \"netaddr\" environment"
" variable\n");
aprint_normal_dev(self, "Ethernet address %s\n",
ether_sprintf(sc->sc_enaddr));
/* Done, now attach everything */
mii->mii_ifp = ifp;
mii->mii_readreg = mec_mii_readreg;
mii->mii_writereg = mec_mii_writereg;
mii->mii_statchg = mec_statchg;
/* Set up PHY properties */
sc->sc_ethercom.ec_mii = mii;
ifmedia_init(&mii->mii_media, 0, ether_mediachange, ether_mediastatus);
mii_attach(self, mii, 0xffffffff, MII_PHY_ANY, MII_OFFSET_ANY, 0);
child = LIST_FIRST(&mii->mii_phys);
if (child == NULL) {
/* No PHY attached */
ifmedia_add(&mii->mii_media, IFM_ETHER | IFM_MANUAL,
0, NULL);
ifmedia_set(&mii->mii_media, IFM_ETHER | IFM_MANUAL);
} else {
ifmedia_set(&mii->mii_media, IFM_ETHER | IFM_AUTO);
sc->sc_phyaddr = child->mii_phy;
}
strcpy(ifp->if_xname, device_xname(self));
ifp->if_softc = sc;
ifp->if_flags = IFF_BROADCAST | IFF_SIMPLEX | IFF_MULTICAST;
ifp->if_ioctl = mec_ioctl;
ifp->if_start = mec_start;
ifp->if_watchdog = mec_watchdog;
ifp->if_init = mec_init;
ifp->if_stop = mec_stop;
ifp->if_mtu = ETHERMTU;
IFQ_SET_READY(&ifp->if_snd);
/* mec has dumb RX cksum support */
ifp->if_capabilities = IFCAP_CSUM_TCPv4_Rx | IFCAP_CSUM_UDPv4_Rx;
/* We can support 802.1Q VLAN-sized frames. */
sc->sc_ethercom.ec_capabilities |= ETHERCAP_VLAN_MTU;
/* attach the interface */
if_attach(ifp);
if_deferred_start_init(ifp, NULL);
ether_ifattach(ifp, sc->sc_enaddr);
/* establish interrupt */
cpu_intr_establish(maa->maa_intr, maa->maa_intrmask, mec_intr, sc);
rnd_attach_source(&sc->sc_rnd_source, device_xname(self),
RND_TYPE_NET, RND_FLAG_DEFAULT);
#ifdef MEC_EVENT_COUNTERS
evcnt_attach_dynamic(&sc->sc_ev_txpkts , EVCNT_TYPE_MISC,
NULL, device_xname(self), "TX pkts queued total");
evcnt_attach_dynamic(&sc->sc_ev_txdpad , EVCNT_TYPE_MISC,
NULL, device_xname(self), "TX pkts padded in txdesc buf");
evcnt_attach_dynamic(&sc->sc_ev_txdbuf , EVCNT_TYPE_MISC,
NULL, device_xname(self), "TX pkts copied to txdesc buf");
evcnt_attach_dynamic(&sc->sc_ev_txptr1 , EVCNT_TYPE_MISC,
NULL, device_xname(self), "TX pkts using concat ptr1");
evcnt_attach_dynamic(&sc->sc_ev_txptr1a , EVCNT_TYPE_MISC,
NULL, device_xname(self), "TX pkts w/ptr1 ~160bytes");
evcnt_attach_dynamic(&sc->sc_ev_txptr1b , EVCNT_TYPE_MISC,
NULL, device_xname(self), "TX pkts w/ptr1 ~256bytes");
evcnt_attach_dynamic(&sc->sc_ev_txptr1c , EVCNT_TYPE_MISC,
NULL, device_xname(self), "TX pkts w/ptr1 ~512bytes");
evcnt_attach_dynamic(&sc->sc_ev_txptr1d , EVCNT_TYPE_MISC,
NULL, device_xname(self), "TX pkts w/ptr1 ~1024bytes");
evcnt_attach_dynamic(&sc->sc_ev_txptr1e , EVCNT_TYPE_MISC,
NULL, device_xname(self), "TX pkts w/ptr1 >1024bytes");
evcnt_attach_dynamic(&sc->sc_ev_txptr2 , EVCNT_TYPE_MISC,
NULL, device_xname(self), "TX pkts using concat ptr1,2");
evcnt_attach_dynamic(&sc->sc_ev_txptr2a , EVCNT_TYPE_MISC,
NULL, device_xname(self), "TX pkts w/ptr2 ~160bytes");
evcnt_attach_dynamic(&sc->sc_ev_txptr2b , EVCNT_TYPE_MISC,
NULL, device_xname(self), "TX pkts w/ptr2 ~256bytes");
evcnt_attach_dynamic(&sc->sc_ev_txptr2c , EVCNT_TYPE_MISC,
NULL, device_xname(self), "TX pkts w/ptr2 ~512bytes");
evcnt_attach_dynamic(&sc->sc_ev_txptr2d , EVCNT_TYPE_MISC,
NULL, device_xname(self), "TX pkts w/ptr2 ~1024bytes");
evcnt_attach_dynamic(&sc->sc_ev_txptr2e , EVCNT_TYPE_MISC,
NULL, device_xname(self), "TX pkts w/ptr2 >1024bytes");
evcnt_attach_dynamic(&sc->sc_ev_txptr3 , EVCNT_TYPE_MISC,
NULL, device_xname(self), "TX pkts using concat ptr1,2,3");
evcnt_attach_dynamic(&sc->sc_ev_txptr3a , EVCNT_TYPE_MISC,
NULL, device_xname(self), "TX pkts w/ptr3 ~160bytes");
evcnt_attach_dynamic(&sc->sc_ev_txptr3b , EVCNT_TYPE_MISC,
NULL, device_xname(self), "TX pkts w/ptr3 ~256bytes");
evcnt_attach_dynamic(&sc->sc_ev_txptr3c , EVCNT_TYPE_MISC,
NULL, device_xname(self), "TX pkts w/ptr3 ~512bytes");
evcnt_attach_dynamic(&sc->sc_ev_txptr3d , EVCNT_TYPE_MISC,
NULL, device_xname(self), "TX pkts w/ptr3 ~1024bytes");
evcnt_attach_dynamic(&sc->sc_ev_txptr3e , EVCNT_TYPE_MISC,
NULL, device_xname(self), "TX pkts w/ptr3 >1024bytes");
evcnt_attach_dynamic(&sc->sc_ev_txmbuf , EVCNT_TYPE_MISC,
NULL, device_xname(self), "TX pkts copied to new mbufs");
evcnt_attach_dynamic(&sc->sc_ev_txmbufa , EVCNT_TYPE_MISC,
NULL, device_xname(self), "TX pkts w/mbuf ~160bytes");
evcnt_attach_dynamic(&sc->sc_ev_txmbufb , EVCNT_TYPE_MISC,
NULL, device_xname(self), "TX pkts w/mbuf ~256bytes");
evcnt_attach_dynamic(&sc->sc_ev_txmbufc , EVCNT_TYPE_MISC,
NULL, device_xname(self), "TX pkts w/mbuf ~512bytes");
evcnt_attach_dynamic(&sc->sc_ev_txmbufd , EVCNT_TYPE_MISC,
NULL, device_xname(self), "TX pkts w/mbuf ~1024bytes");
evcnt_attach_dynamic(&sc->sc_ev_txmbufe , EVCNT_TYPE_MISC,
NULL, device_xname(self), "TX pkts w/mbuf >1024bytes");
evcnt_attach_dynamic(&sc->sc_ev_txptrs , EVCNT_TYPE_MISC,
NULL, device_xname(self), "TX pkts using ptrs total");
evcnt_attach_dynamic(&sc->sc_ev_txptrc0 , EVCNT_TYPE_MISC,
NULL, device_xname(self), "TX pkts w/ptrs no hdr chain");
evcnt_attach_dynamic(&sc->sc_ev_txptrc1 , EVCNT_TYPE_MISC,
NULL, device_xname(self), "TX pkts w/ptrs 1 hdr chain");
evcnt_attach_dynamic(&sc->sc_ev_txptrc2 , EVCNT_TYPE_MISC,
NULL, device_xname(self), "TX pkts w/ptrs 2 hdr chains");
evcnt_attach_dynamic(&sc->sc_ev_txptrc3 , EVCNT_TYPE_MISC,
NULL, device_xname(self), "TX pkts w/ptrs 3 hdr chains");
evcnt_attach_dynamic(&sc->sc_ev_txptrc4 , EVCNT_TYPE_MISC,
NULL, device_xname(self), "TX pkts w/ptrs 4 hdr chains");
evcnt_attach_dynamic(&sc->sc_ev_txptrc5 , EVCNT_TYPE_MISC,
NULL, device_xname(self), "TX pkts w/ptrs 5 hdr chains");
evcnt_attach_dynamic(&sc->sc_ev_txptrc6 , EVCNT_TYPE_MISC,
NULL, device_xname(self), "TX pkts w/ptrs >5 hdr chains");
evcnt_attach_dynamic(&sc->sc_ev_txptrh0 , EVCNT_TYPE_MISC,
NULL, device_xname(self), "TX pkts w/ptrs ~8bytes hdr");
evcnt_attach_dynamic(&sc->sc_ev_txptrh1 , EVCNT_TYPE_MISC,
NULL, device_xname(self), "TX pkts w/ptrs ~16bytes hdr");
evcnt_attach_dynamic(&sc->sc_ev_txptrh2 , EVCNT_TYPE_MISC,
NULL, device_xname(self), "TX pkts w/ptrs ~32bytes hdr");
evcnt_attach_dynamic(&sc->sc_ev_txptrh3 , EVCNT_TYPE_MISC,
NULL, device_xname(self), "TX pkts w/ptrs ~64bytes hdr");
evcnt_attach_dynamic(&sc->sc_ev_txptrh4 , EVCNT_TYPE_MISC,
NULL, device_xname(self), "TX pkts w/ptrs ~80bytes hdr");
evcnt_attach_dynamic(&sc->sc_ev_txptrh5 , EVCNT_TYPE_MISC,
NULL, device_xname(self), "TX pkts w/ptrs ~96bytes hdr");
evcnt_attach_dynamic(&sc->sc_ev_txdstall , EVCNT_TYPE_MISC,
NULL, device_xname(self), "TX stalled due to no txdesc");
evcnt_attach_dynamic(&sc->sc_ev_txempty , EVCNT_TYPE_MISC,
NULL, device_xname(self), "TX empty interrupts");
evcnt_attach_dynamic(&sc->sc_ev_txsent , EVCNT_TYPE_MISC,
NULL, device_xname(self), "TX sent interrupts");
#endif
/* set shutdown hook to reset interface on powerdown */
if (pmf_device_register1(self, NULL, NULL, mec_shutdown))
pmf_class_network_register(self, ifp);
else
aprint_error_dev(self, "couldn't establish power handler\n");
return;
/*
* Free any resources we've allocated during the failed attach
* attempt. Do this in reverse order and fall though.
*/
fail_4:
for (i = 0; i < MEC_NTXDESC; i++) {
if (sc->sc_txsoft[i].txs_dmamap != NULL)
bus_dmamap_destroy(sc->sc_dmat,
sc->sc_txsoft[i].txs_dmamap);
}
bus_dmamap_unload(sc->sc_dmat, sc->sc_cddmamap);
fail_3:
bus_dmamap_destroy(sc->sc_dmat, sc->sc_cddmamap);
fail_2:
bus_dmamem_unmap(sc->sc_dmat, (void *)sc->sc_control_data,
sizeof(struct mec_control_data));
fail_1:
bus_dmamem_free(sc->sc_dmat, &seg, rseg);
fail_0:
return;
}
static int
mec_mii_readreg(device_t self, int phy, int reg, uint16_t *val)
{
struct mec_softc *sc = device_private(self);
bus_space_tag_t st = sc->sc_st;
bus_space_handle_t sh = sc->sc_sh;
uint64_t data;
int i, rv;
if ((rv = mec_mii_wait(sc)) != 0)
return rv;
bus_space_write_8(st, sh, MEC_PHY_ADDRESS,
(phy << MEC_PHY_ADDR_DEVSHIFT) | (reg & MEC_PHY_ADDR_REGISTER));
delay(25);
bus_space_write_8(st, sh, MEC_PHY_READ_INITIATE, 1);
delay(25);
mec_mii_wait(sc);
for (i = 0; i < 20; i++) {
delay(30);
data = bus_space_read_8(st, sh, MEC_PHY_DATA);
if ((data & MEC_PHY_DATA_BUSY) == 0) {
*val = data & MEC_PHY_DATA_VALUE;
return 0;
}
}
return -1;
}
static int
mec_mii_writereg(device_t self, int phy, int reg, uint16_t val)
{
struct mec_softc *sc = device_private(self);
bus_space_tag_t st = sc->sc_st;
bus_space_handle_t sh = sc->sc_sh;
int rv;
if ((rv = mec_mii_wait(sc)) != 0) {
printf("timed out writing %x: %hx\n", reg, val);
return rv;
}
bus_space_write_8(st, sh, MEC_PHY_ADDRESS,
(phy << MEC_PHY_ADDR_DEVSHIFT) | (reg & MEC_PHY_ADDR_REGISTER));
delay(60);
bus_space_write_8(st, sh, MEC_PHY_DATA, val & MEC_PHY_DATA_VALUE);
delay(60);
mec_mii_wait(sc);
return 0;
}
static int
mec_mii_wait(struct mec_softc *sc)
{
uint32_t busy;
int i, s;
for (i = 0; i < 100; i++) {
delay(30);
s = splhigh();
busy = bus_space_read_8(sc->sc_st, sc->sc_sh, MEC_PHY_DATA);
splx(s);
if ((busy & MEC_PHY_DATA_BUSY) == 0)
return 0;
#if 0
if (busy == 0xffff) /* XXX ? */
return 0;
#endif
}
printf("%s: MII timed out\n", device_xname(sc->sc_dev));
return ETIMEDOUT;
}
static void
mec_statchg(struct ifnet *ifp)
{
struct mec_softc *sc = ifp->if_softc;
bus_space_tag_t st = sc->sc_st;
bus_space_handle_t sh = sc->sc_sh;
uint32_t control;
control = bus_space_read_8(st, sh, MEC_MAC_CONTROL);
control &= ~(MEC_MAC_IPGT | MEC_MAC_IPGR1 | MEC_MAC_IPGR2 |
MEC_MAC_FULL_DUPLEX | MEC_MAC_SPEED_SELECT);
/* must also set IPG here for duplex stuff ... */
if ((sc->sc_mii.mii_media_active & IFM_FDX) != 0) {
control |= MEC_MAC_FULL_DUPLEX;
} else {
/* set IPG */
control |= MEC_MAC_IPG_DEFAULT;
}
bus_space_write_8(st, sh, MEC_MAC_CONTROL, control);
}
static int
mec_init(struct ifnet *ifp)
{
struct mec_softc *sc = ifp->if_softc;
bus_space_tag_t st = sc->sc_st;
bus_space_handle_t sh = sc->sc_sh;
struct mec_rxdesc *rxd;
int i, rc;
/* cancel any pending I/O */
mec_stop(ifp, 0);
/* reset device */
mec_reset(sc);
/* setup filter for multicast or promisc mode */
mec_setfilter(sc);
/* set the TX ring pointer to the base address */
bus_space_write_8(st, sh, MEC_TX_RING_BASE, MEC_CDTXADDR(sc, 0));
sc->sc_txpending = 0;
sc->sc_txdirty = 0;
sc->sc_txlast = MEC_NTXDESC - 1;
/* put RX buffers into FIFO */
for (i = 0; i < MEC_NRXDESC; i++) {
rxd = &sc->sc_rxdesc[i];
rxd->rxd_stat = 0;
MEC_RXSTATSYNC(sc, i, BUS_DMASYNC_PREREAD);
MEC_RXBUFSYNC(sc, i, ETHER_MAX_LEN, BUS_DMASYNC_PREREAD);
bus_space_write_8(st, sh, MEC_MCL_RX_FIFO, MEC_CDRXADDR(sc, i));
}
sc->sc_rxptr = 0;
#if 0 /* XXX no info */
bus_space_write_8(st, sh, MEC_TIMER, 0);
#endif
/*
* MEC_DMA_TX_INT_ENABLE will be set later otherwise it causes
* spurious interrupts when TX buffers are empty
*/
bus_space_write_8(st, sh, MEC_DMA_CONTROL,
(MEC_RXD_DMAOFFSET << MEC_DMA_RX_DMA_OFFSET_SHIFT) |
(MEC_NRXDESC << MEC_DMA_RX_INT_THRESH_SHIFT) |
MEC_DMA_TX_DMA_ENABLE | /* MEC_DMA_TX_INT_ENABLE | */
MEC_DMA_RX_DMA_ENABLE | MEC_DMA_RX_INT_ENABLE);
callout_reset(&sc->sc_tick_ch, hz, mec_tick, sc);
if ((rc = ether_mediachange(ifp)) != 0)
return rc;
ifp->if_flags |= IFF_RUNNING;
mec_start(ifp);
return 0;
}
static void
mec_reset(struct mec_softc *sc)
{
bus_space_tag_t st = sc->sc_st;
bus_space_handle_t sh = sc->sc_sh;
uint64_t control;
/* stop DMA first */
bus_space_write_8(st, sh, MEC_DMA_CONTROL, 0);
/* reset chip */
bus_space_write_8(st, sh, MEC_MAC_CONTROL, MEC_MAC_CORE_RESET);
delay(1000);
bus_space_write_8(st, sh, MEC_MAC_CONTROL, 0);
delay(1000);
/* Default to 100/half and let auto-negotiation work its magic */
control = MEC_MAC_SPEED_SELECT | MEC_MAC_FILTER_MATCHMULTI |
MEC_MAC_IPG_DEFAULT;
bus_space_write_8(st, sh, MEC_MAC_CONTROL, control);
/* stop DMA again for sanity */
bus_space_write_8(st, sh, MEC_DMA_CONTROL, 0);
DPRINTF(MEC_DEBUG_RESET, ("mec: control now %llx\n",
bus_space_read_8(st, sh, MEC_MAC_CONTROL)));
}
static void
mec_start(struct ifnet *ifp)
{
struct mec_softc *sc = ifp->if_softc;
struct mbuf *m0, *m;
struct mec_txdesc *txd;
struct mec_txsoft *txs;
bus_dmamap_t dmamap;
bus_space_tag_t st = sc->sc_st;
bus_space_handle_t sh = sc->sc_sh;
int error, firsttx, nexttx, opending;
int len, bufoff, buflen, nsegs, align, resid, pseg, nptr, slen, i;
uint32_t txdcmd;
if ((ifp->if_flags & IFF_RUNNING) == 0)
return;
/*
* Remember the previous txpending and the first transmit descriptor.
*/
opending = sc->sc_txpending;
firsttx = MEC_NEXTTX(sc->sc_txlast);
DPRINTF(MEC_DEBUG_START,
("%s: opending = %d, firsttx = %d\n", __func__, opending, firsttx));
while (sc->sc_txpending < MEC_NTXDESC - 1) {
/* Grab a packet off the queue. */
IFQ_POLL(&ifp->if_snd, m0);
if (m0 == NULL)
break;
m = NULL;
/*
* Get the next available transmit descriptor.
*/
nexttx = MEC_NEXTTX(sc->sc_txlast);
txd = &sc->sc_txdesc[nexttx];
txs = &sc->sc_txsoft[nexttx];
dmamap = txs->txs_dmamap;
txs->txs_flags = 0;
buflen = 0;
bufoff = 0;
resid = 0;
nptr = 0; /* XXX gcc */
pseg = 0; /* XXX gcc */
len = m0->m_pkthdr.len;
DPRINTF(MEC_DEBUG_START,
("%s: len = %d, nexttx = %d, txpending = %d\n",
__func__, len, nexttx, sc->sc_txpending));
if (len <= MEC_TXD_BUFSIZE) {
/*
* If a TX packet will fit into small txdesc buffer,
* just copy it into there. Maybe it's faster than
* checking alignment and calling bus_dma(9) etc.
*/
DPRINTF(MEC_DEBUG_START, ("%s: short packet\n",
__func__));
IFQ_DEQUEUE(&ifp->if_snd, m0);
/*
* I don't know if MEC chip does auto padding,
* but do it manually for safety.
*/
if (len < ETHER_PAD_LEN) {
MEC_EVCNT_INCR(&sc->sc_ev_txdpad);
bufoff = MEC_TXD_BUFSTART(ETHER_PAD_LEN);
m_copydata(m0, 0, len, txd->txd_buf + bufoff);
memset(txd->txd_buf + bufoff + len, 0,
ETHER_PAD_LEN - len);
len = buflen = ETHER_PAD_LEN;
} else {
MEC_EVCNT_INCR(&sc->sc_ev_txdbuf);
bufoff = MEC_TXD_BUFSTART(len);
m_copydata(m0, 0, len, txd->txd_buf + bufoff);
buflen = len;
}
} else {
/*
* If the packet won't fit the static buffer in txdesc,
* we have to use the concatenate pointers to handle it.
*/
DPRINTF(MEC_DEBUG_START, ("%s: long packet\n",
__func__));
txs->txs_flags = MEC_TXS_TXDPTR;
/*
* Call bus_dmamap_load_mbuf(9) first to see
* how many chains the TX mbuf has.
*/
error = bus_dmamap_load_mbuf(sc->sc_dmat, dmamap, m0,
BUS_DMA_WRITE | BUS_DMA_NOWAIT);
if (error == 0) {
/*
* Check chains which might contain headers.
* They might be so much fragmented and
* it's better to copy them into txdesc buffer
* since they would be small enough.
*/
nsegs = dmamap->dm_nsegs;
for (pseg = 0; pseg < nsegs; pseg++) {
slen = dmamap->dm_segs[pseg].ds_len;
if (buflen + slen >
MEC_TXD_BUFSIZE1 - MEC_TXD_ALIGN)
break;
buflen += slen;
}
/*
* Check if the rest chains can be fit into
* the concatinate pointers.
*/
align = dmamap->dm_segs[pseg].ds_addr &
MEC_TXD_ALIGNMASK;
if (align > 0) {
/*
* If the first chain isn't uint64_t
* aligned, append the unaligned part
* into txdesc buffer too.
*/
resid = MEC_TXD_ALIGN - align;
buflen += resid;
for (; pseg < nsegs; pseg++) {
slen =
dmamap->dm_segs[pseg].ds_len;
if (slen > resid)
break;
resid -= slen;
}
} else if (pseg == 0) {
/*
* In this case, the first chain is
* uint64_t aligned but it's too long
* to put into txdesc buf.
* We have to put some data into
* txdesc buf even in this case,
* so put MEC_TXD_ALIGN bytes there.
*/
buflen = resid = MEC_TXD_ALIGN;
}
nptr = nsegs - pseg;
if (nptr <= MEC_NTXPTR) {
bufoff = MEC_TXD_BUFSTART(buflen);
/*
* Check if all the rest chains are
* uint64_t aligned.
*/
align = 0;
for (i = pseg + 1; i < nsegs; i++)
align |=
dmamap->dm_segs[i].ds_addr
& MEC_TXD_ALIGNMASK;
if (align != 0) {
/* chains are not aligned */
error = -1;
}
} else {
/* The TX mbuf chains doesn't fit. */
error = -1;
}
if (error == -1)
bus_dmamap_unload(sc->sc_dmat, dmamap);
}
if (error != 0) {
/*
* The TX mbuf chains can't be put into
* the concatinate buffers. In this case,
* we have to allocate a new contiguous mbuf
* and copy data into it.
*
* Even in this case, the Ethernet header in
* the TX mbuf might be unaligned and trailing
* data might be word aligned, so put 2 byte
* (MEC_ETHER_ALIGN) padding at the top of the
* allocated mbuf and copy TX packets.
* 6 bytes (MEC_ALIGN_BYTES - MEC_ETHER_ALIGN)
* at the top of the new mbuf won't be uint64_t
* alignd, but we have to put some data into
* txdesc buffer anyway even if the buffer
* is uint64_t aligned.
*/
DPRINTF(MEC_DEBUG_START | MEC_DEBUG_TXSEGS,
("%s: re-allocating mbuf\n", __func__));
MGETHDR(m, M_DONTWAIT, MT_DATA);
if (m == NULL) {
printf("%s: unable to allocate "
"TX mbuf\n",
device_xname(sc->sc_dev));
break;
}
if (len > (MHLEN - MEC_ETHER_ALIGN)) {
MCLGET(m, M_DONTWAIT);
if ((m->m_flags & M_EXT) == 0) {
printf("%s: unable to allocate "
"TX cluster\n",
device_xname(sc->sc_dev));
m_freem(m);
break;
}
}
m->m_data += MEC_ETHER_ALIGN;
/*
* Copy whole data (including unaligned part)
* for following bpf_mtap().
*/
m_copydata(m0, 0, len, mtod(m, void *));
m->m_pkthdr.len = m->m_len = len;
error = bus_dmamap_load_mbuf(sc->sc_dmat,
dmamap, m, BUS_DMA_WRITE | BUS_DMA_NOWAIT);
if (dmamap->dm_nsegs > 1) {
/* should not happen, but for sanity */
bus_dmamap_unload(sc->sc_dmat, dmamap);
error = -1;
}
if (error != 0) {
printf("%s: unable to load TX buffer, "
"error = %d\n",
device_xname(sc->sc_dev), error);
m_freem(m);
break;
}
/*
* Only the first segment should be put into
* the concatinate pointer in this case.
*/
pseg = 0;
nptr = 1;
/*
* Set length of unaligned part which will be
* copied into txdesc buffer.
*/
buflen = MEC_TXD_ALIGN - MEC_ETHER_ALIGN;
bufoff = MEC_TXD_BUFSTART(buflen);
resid = buflen;
#ifdef MEC_EVENT_COUNTERS
MEC_EVCNT_INCR(&sc->sc_ev_txmbuf);
if (len <= 160)
MEC_EVCNT_INCR(&sc->sc_ev_txmbufa);
else if (len <= 256)
MEC_EVCNT_INCR(&sc->sc_ev_txmbufb);
else if (len <= 512)
MEC_EVCNT_INCR(&sc->sc_ev_txmbufc);
else if (len <= 1024)
MEC_EVCNT_INCR(&sc->sc_ev_txmbufd);
else
MEC_EVCNT_INCR(&sc->sc_ev_txmbufe);
#endif
}
#ifdef MEC_EVENT_COUNTERS
else {
MEC_EVCNT_INCR(&sc->sc_ev_txptrs);
if (nptr == 1) {
MEC_EVCNT_INCR(&sc->sc_ev_txptr1);
if (len <= 160)
MEC_EVCNT_INCR(
&sc->sc_ev_txptr1a);
else if (len <= 256)
MEC_EVCNT_INCR(
&sc->sc_ev_txptr1b);
else if (len <= 512)
MEC_EVCNT_INCR(
&sc->sc_ev_txptr1c);
else if (len <= 1024)
MEC_EVCNT_INCR(
&sc->sc_ev_txptr1d);
else
MEC_EVCNT_INCR(
&sc->sc_ev_txptr1e);
} else if (nptr == 2) {
MEC_EVCNT_INCR(&sc->sc_ev_txptr2);
if (len <= 160)
MEC_EVCNT_INCR(
&sc->sc_ev_txptr2a);
else if (len <= 256)
MEC_EVCNT_INCR(
&sc->sc_ev_txptr2b);
else if (len <= 512)
MEC_EVCNT_INCR(
&sc->sc_ev_txptr2c);
else if (len <= 1024)
MEC_EVCNT_INCR(
&sc->sc_ev_txptr2d);
else
MEC_EVCNT_INCR(
&sc->sc_ev_txptr2e);
} else if (nptr == 3) {
MEC_EVCNT_INCR(&sc->sc_ev_txptr3);
if (len <= 160)
MEC_EVCNT_INCR(
&sc->sc_ev_txptr3a);
else if (len <= 256)
MEC_EVCNT_INCR(
&sc->sc_ev_txptr3b);
else if (len <= 512)
MEC_EVCNT_INCR(
&sc->sc_ev_txptr3c);
else if (len <= 1024)
MEC_EVCNT_INCR(
&sc->sc_ev_txptr3d);
else
MEC_EVCNT_INCR(
&sc->sc_ev_txptr3e);
}
if (pseg == 0)
MEC_EVCNT_INCR(&sc->sc_ev_txptrc0);
else if (pseg == 1)
MEC_EVCNT_INCR(&sc->sc_ev_txptrc1);
else if (pseg == 2)
MEC_EVCNT_INCR(&sc->sc_ev_txptrc2);
else if (pseg == 3)
MEC_EVCNT_INCR(&sc->sc_ev_txptrc3);
else if (pseg == 4)
MEC_EVCNT_INCR(&sc->sc_ev_txptrc4);
else if (pseg == 5)
MEC_EVCNT_INCR(&sc->sc_ev_txptrc5);
else
MEC_EVCNT_INCR(&sc->sc_ev_txptrc6);
if (buflen <= 8)
MEC_EVCNT_INCR(&sc->sc_ev_txptrh0);
else if (buflen <= 16)
MEC_EVCNT_INCR(&sc->sc_ev_txptrh1);
else if (buflen <= 32)
MEC_EVCNT_INCR(&sc->sc_ev_txptrh2);
else if (buflen <= 64)
MEC_EVCNT_INCR(&sc->sc_ev_txptrh3);
else if (buflen <= 80)
MEC_EVCNT_INCR(&sc->sc_ev_txptrh4);
else
MEC_EVCNT_INCR(&sc->sc_ev_txptrh5);
}
#endif
m_copydata(m0, 0, buflen, txd->txd_buf + bufoff);
IFQ_DEQUEUE(&ifp->if_snd, m0);
if (m != NULL) {
m_freem(m0);
m0 = m;
}
/*
* sync the DMA map for TX mbuf
*/
bus_dmamap_sync(sc->sc_dmat, dmamap, buflen,
len - buflen, BUS_DMASYNC_PREWRITE);
}
/*
* Pass packet to bpf if there is a listener.
*/
bpf_mtap(ifp, m0, BPF_D_OUT);
MEC_EVCNT_INCR(&sc->sc_ev_txpkts);
/*
* setup the transmit descriptor.
*/
txdcmd = TXCMD_BUFSTART(MEC_TXDESCSIZE - buflen) | (len - 1);
/*
* Set MEC_TXCMD_TXINT every MEC_NTXDESC_INTR packets
* if more than half txdescs have been queued
* because TX_EMPTY interrupts will rarely happen
* if TX queue is so stacked.
*/
if (sc->sc_txpending > (MEC_NTXDESC / 2) &&
(nexttx & (MEC_NTXDESC_INTR - 1)) == 0)
txdcmd |= MEC_TXCMD_TXINT;
if ((txs->txs_flags & MEC_TXS_TXDPTR) != 0) {
bus_dma_segment_t *segs = dmamap->dm_segs;
DPRINTF(MEC_DEBUG_TXSEGS,
("%s: nsegs = %d, pseg = %d, nptr = %d\n",
__func__, dmamap->dm_nsegs, pseg, nptr));
switch (nptr) {
case 3:
KASSERT((segs[pseg + 2].ds_addr &
MEC_TXD_ALIGNMASK) == 0);
txdcmd |= MEC_TXCMD_PTR3;
txd->txd_ptr[2] =
TXPTR_LEN(segs[pseg + 2].ds_len - 1) |
segs[pseg + 2].ds_addr;
/* FALLTHROUGH */
case 2:
KASSERT((segs[pseg + 1].ds_addr &
MEC_TXD_ALIGNMASK) == 0);
txdcmd |= MEC_TXCMD_PTR2;
txd->txd_ptr[1] =
TXPTR_LEN(segs[pseg + 1].ds_len - 1) |
segs[pseg + 1].ds_addr;
/* FALLTHROUGH */
case 1:
txdcmd |= MEC_TXCMD_PTR1;
txd->txd_ptr[0] =
TXPTR_LEN(segs[pseg].ds_len - resid - 1) |
(segs[pseg].ds_addr + resid);
break;
default:
panic("%s: impossible nptr in %s",
device_xname(sc->sc_dev), __func__);
/* NOTREACHED */
}
/*
* Store a pointer to the packet so we can
* free it later.
*/
txs->txs_mbuf = m0;
} else {
/*
* In this case all data are copied to buffer in txdesc,
* we can free TX mbuf here.
*/
m_freem(m0);
}
txd->txd_cmd = txdcmd;
DPRINTF(MEC_DEBUG_START,
("%s: txd_cmd = 0x%016llx\n",
__func__, txd->txd_cmd));
DPRINTF(MEC_DEBUG_START,
("%s: txd_ptr[0] = 0x%016llx\n",
__func__, txd->txd_ptr[0]));
DPRINTF(MEC_DEBUG_START,
("%s: txd_ptr[1] = 0x%016llx\n",
__func__, txd->txd_ptr[1]));
DPRINTF(MEC_DEBUG_START,
("%s: txd_ptr[2] = 0x%016llx\n",
__func__, txd->txd_ptr[2]));
DPRINTF(MEC_DEBUG_START,
("%s: len = %d (0x%04x), buflen = %d (0x%02x)\n",
__func__, len, len, buflen, buflen));
/* sync TX descriptor */
MEC_TXDESCSYNC(sc, nexttx,
BUS_DMASYNC_PREREAD | BUS_DMASYNC_PREWRITE);
/* start TX */
bus_space_write_8(st, sh, MEC_TX_RING_PTR, MEC_NEXTTX(nexttx));
/* advance the TX pointer. */
sc->sc_txpending++;
sc->sc_txlast = nexttx;
}
if (sc->sc_txpending == MEC_NTXDESC - 1) {
/* No more slots. */
MEC_EVCNT_INCR(&sc->sc_ev_txdstall);
}
if (sc->sc_txpending != opending) {
/*
* If the transmitter was idle,
* reset the txdirty pointer and re-enable TX interrupt.
*/
if (opending == 0) {
sc->sc_txdirty = firsttx;
bus_space_write_8(st, sh, MEC_TX_ALIAS,
MEC_TX_ALIAS_INT_ENABLE);
}
/* Set a watchdog timer in case the chip flakes out. */
ifp->if_timer = 5;
}
}
static void
mec_stop(struct ifnet *ifp, int disable)
{
struct mec_softc *sc = ifp->if_softc;
struct mec_txsoft *txs;
int i;
DPRINTF(MEC_DEBUG_STOP, ("%s\n", __func__));
ifp->if_timer = 0;
ifp->if_flags &= ~IFF_RUNNING;
callout_stop(&sc->sc_tick_ch);
mii_down(&sc->sc_mii);
/* release any TX buffers */
for (i = 0; i < MEC_NTXDESC; i++) {
txs = &sc->sc_txsoft[i];
if ((txs->txs_flags & MEC_TXS_TXDPTR) != 0) {
bus_dmamap_unload(sc->sc_dmat, txs->txs_dmamap);
m_freem(txs->txs_mbuf);
txs->txs_mbuf = NULL;
}
}
}
static int
mec_ioctl(struct ifnet *ifp, u_long cmd, void *data)
{
int s, error;
s = splnet();
error = ether_ioctl(ifp, cmd, data);
if (error == ENETRESET) {
/*
* Multicast list has changed; set the hardware filter
* accordingly.
*/
if (ifp->if_flags & IFF_RUNNING)
error = mec_init(ifp);
else
error = 0;
}
/* Try to get more packets going. */
mec_start(ifp);
splx(s);
return error;
}
static void
mec_watchdog(struct ifnet *ifp)
{
struct mec_softc *sc = ifp->if_softc;
printf("%s: device timeout\n", device_xname(sc->sc_dev));
if_statinc(ifp, if_oerrors);
mec_init(ifp);
}
static void
mec_tick(void *arg)
{
struct mec_softc *sc = arg;
int s;
s = splnet();
mii_tick(&sc->sc_mii);
splx(s);
callout_reset(&sc->sc_tick_ch, hz, mec_tick, sc);
}
static void
mec_setfilter(struct mec_softc *sc)
{
struct ethercom *ec = &sc->sc_ethercom;
struct ifnet *ifp = &sc->sc_ethercom.ec_if;
struct ether_multi *enm;
struct ether_multistep step;
bus_space_tag_t st = sc->sc_st;
bus_space_handle_t sh = sc->sc_sh;
uint64_t mchash;
uint32_t control, hash;
int mcnt;
control = bus_space_read_8(st, sh, MEC_MAC_CONTROL);
control &= ~MEC_MAC_FILTER_MASK;
if (ifp->if_flags & IFF_PROMISC) {
control |= MEC_MAC_FILTER_PROMISC;
bus_space_write_8(st, sh, MEC_MULTICAST, 0xffffffffffffffffULL);
bus_space_write_8(st, sh, MEC_MAC_CONTROL, control);
return;
}
mcnt = 0;
mchash = 0;
ETHER_LOCK(ec);
ETHER_FIRST_MULTI(step, ec, enm);
while (enm != NULL) {
if (memcmp(enm->enm_addrlo, enm->enm_addrhi, ETHER_ADDR_LEN)) {
/* set allmulti for a range of multicast addresses */
control |= MEC_MAC_FILTER_ALLMULTI;
bus_space_write_8(st, sh, MEC_MULTICAST,
0xffffffffffffffffULL);
bus_space_write_8(st, sh, MEC_MAC_CONTROL, control);
ETHER_UNLOCK(ec);
return;
}
#define mec_calchash(addr) (ether_crc32_be((addr), ETHER_ADDR_LEN) >> 26)
hash = mec_calchash(enm->enm_addrlo);
mchash |= 1 << hash;
mcnt++;
ETHER_NEXT_MULTI(step, enm);
}
ETHER_UNLOCK(ec);
ifp->if_flags &= ~IFF_ALLMULTI;
if (mcnt > 0)
control |= MEC_MAC_FILTER_MATCHMULTI;
bus_space_write_8(st, sh, MEC_MULTICAST, mchash);
bus_space_write_8(st, sh, MEC_MAC_CONTROL, control);
}
static int
mec_intr(void *arg)
{
struct mec_softc *sc = arg;
bus_space_tag_t st = sc->sc_st;
bus_space_handle_t sh = sc->sc_sh;
struct ifnet *ifp = &sc->sc_ethercom.ec_if;
uint32_t statreg, statack, txptr;
int handled, sent;
DPRINTF(MEC_DEBUG_INTR, ("%s: called\n", __func__));
handled = sent = 0;
for (;;) {
statreg = bus_space_read_8(st, sh, MEC_INT_STATUS);
DPRINTF(MEC_DEBUG_INTR,
("%s: INT_STAT = 0x%08x\n", __func__, statreg));
statack = statreg & MEC_INT_STATUS_MASK;
if (statack == 0)
break;
bus_space_write_8(st, sh, MEC_INT_STATUS, statack);
handled = 1;
if (statack &
(MEC_INT_RX_THRESHOLD |
MEC_INT_RX_FIFO_UNDERFLOW)) {
mec_rxintr(sc);
}
if (statack &
(MEC_INT_TX_EMPTY |
MEC_INT_TX_PACKET_SENT |
MEC_INT_TX_ABORT)) {
txptr = (statreg & MEC_INT_TX_RING_BUFFER_ALIAS)
>> MEC_INT_TX_RING_BUFFER_SHIFT;
mec_txintr(sc, txptr);
sent = 1;
if ((statack & MEC_INT_TX_EMPTY) != 0) {
/*
* disable TX interrupt to stop
* TX empty interrupt
*/
bus_space_write_8(st, sh, MEC_TX_ALIAS, 0);
DPRINTF(MEC_DEBUG_INTR,
("%s: disable TX_INT\n", __func__));
}
#ifdef MEC_EVENT_COUNTERS
if ((statack & MEC_INT_TX_EMPTY) != 0)
MEC_EVCNT_INCR(&sc->sc_ev_txempty);
if ((statack & MEC_INT_TX_PACKET_SENT) != 0)
MEC_EVCNT_INCR(&sc->sc_ev_txsent);
#endif
}
if (statack &
(MEC_INT_TX_LINK_FAIL |
MEC_INT_TX_MEM_ERROR |
MEC_INT_TX_ABORT |
MEC_INT_RX_DMA_UNDERFLOW)) {
printf("%s: %s: interrupt status = 0x%08x\n",
device_xname(sc->sc_dev), __func__, statreg);
mec_init(ifp);
break;
}
}
if (sent) {
/* try to get more packets going */
if_schedule_deferred_start(ifp);
}
if (handled)
rnd_add_uint32(&sc->sc_rnd_source, statreg);
return handled;
}
static void
mec_rxintr(struct mec_softc *sc)
{
bus_space_tag_t st = sc->sc_st;
bus_space_handle_t sh = sc->sc_sh;
struct ifnet *ifp = &sc->sc_ethercom.ec_if;
struct mbuf *m;
struct mec_rxdesc *rxd;
uint64_t rxstat;
u_int len;
int i;
uint32_t crc;
DPRINTF(MEC_DEBUG_RXINTR, ("%s: called\n", __func__));
for (i = sc->sc_rxptr;; i = MEC_NEXTRX(i)) {
rxd = &sc->sc_rxdesc[i];
MEC_RXSTATSYNC(sc, i, BUS_DMASYNC_POSTREAD);
rxstat = rxd->rxd_stat;
DPRINTF(MEC_DEBUG_RXINTR,
("%s: rxstat = 0x%016llx, rxptr = %d\n",
__func__, rxstat, i));
DPRINTF(MEC_DEBUG_RXINTR, ("%s: rxfifo = 0x%08x\n",
__func__, (u_int)bus_space_read_8(st, sh, MEC_RX_FIFO)));
if ((rxstat & MEC_RXSTAT_RECEIVED) == 0) {
MEC_RXSTATSYNC(sc, i, BUS_DMASYNC_PREREAD);
break;
}
len = rxstat & MEC_RXSTAT_LEN;
if (len < ETHER_MIN_LEN ||
len > (MCLBYTES - MEC_ETHER_ALIGN)) {
/* invalid length packet; drop it. */
DPRINTF(MEC_DEBUG_RXINTR,
("%s: wrong packet\n", __func__));
dropit:
if_statinc(ifp, if_ierrors);
rxd->rxd_stat = 0;
MEC_RXSTATSYNC(sc, i, BUS_DMASYNC_PREREAD);
bus_space_write_8(st, sh, MEC_MCL_RX_FIFO,
MEC_CDRXADDR(sc, i));
continue;
}
/*
* If 802.1Q VLAN MTU is enabled, ignore the bad packet error.
*/
if ((sc->sc_ethercom.ec_capenable & ETHERCAP_VLAN_MTU) != 0)
rxstat &= ~MEC_RXSTAT_BADPACKET;
if (rxstat &
(MEC_RXSTAT_BADPACKET |
MEC_RXSTAT_LONGEVENT |
MEC_RXSTAT_INVALID |
MEC_RXSTAT_CRCERROR |
MEC_RXSTAT_VIOLATION)) {
printf("%s: mec_rxintr: status = 0x%016"PRIx64"\n",
device_xname(sc->sc_dev), rxstat);
goto dropit;
}
/*
* The MEC includes the CRC with every packet. Trim
* it off here.
*/
len -= ETHER_CRC_LEN;
/*
* now allocate an mbuf (and possibly a cluster) to hold
* the received packet.
*/
MGETHDR(m, M_DONTWAIT, MT_DATA);
if (m == NULL) {
printf("%s: unable to allocate RX mbuf\n",
device_xname(sc->sc_dev));
goto dropit;
}
if (len > (MHLEN - MEC_ETHER_ALIGN)) {
MCLGET(m, M_DONTWAIT);
if ((m->m_flags & M_EXT) == 0) {
printf("%s: unable to allocate RX cluster\n",
device_xname(sc->sc_dev));
m_freem(m);
m = NULL;
goto dropit;
}
}
/*
* Note MEC chip seems to insert 2 byte padding at the top of
* RX buffer, but we copy whole buffer to avoid unaligned copy.
*/
MEC_RXBUFSYNC(sc, i, len + ETHER_CRC_LEN, BUS_DMASYNC_POSTREAD);
memcpy(mtod(m, void *), rxd->rxd_buf, MEC_ETHER_ALIGN + len);
crc = be32dec(rxd->rxd_buf + MEC_ETHER_ALIGN + len);
MEC_RXBUFSYNC(sc, i, ETHER_MAX_LEN, BUS_DMASYNC_PREREAD);
m->m_data += MEC_ETHER_ALIGN;
/* put RX buffer into FIFO again */
rxd->rxd_stat = 0;
MEC_RXSTATSYNC(sc, i, BUS_DMASYNC_PREREAD);
bus_space_write_8(st, sh, MEC_MCL_RX_FIFO, MEC_CDRXADDR(sc, i));
m_set_rcvif(m, ifp);
m->m_pkthdr.len = m->m_len = len;
if ((ifp->if_csum_flags_rx & (M_CSUM_TCPv4|M_CSUM_UDPv4)) != 0)
mec_rxcsum(sc, m, RXSTAT_CKSUM(rxstat), crc);
/* Pass it on. */
if_percpuq_enqueue(ifp->if_percpuq, m);
}
/* update RX pointer */
sc->sc_rxptr = i;
}
static void
mec_rxcsum(struct mec_softc *sc, struct mbuf *m, uint16_t rxcsum, uint32_t crc)
{
struct ifnet *ifp = &sc->sc_ethercom.ec_if;
struct ether_header *eh;
struct ip *ip;
struct udphdr *uh;
u_int len, pktlen, hlen;
uint32_t csum_data, dsum;
int csum_flags;
const uint16_t *dp;
csum_data = 0;
csum_flags = 0;
len = m->m_len;
if (len < ETHER_HDR_LEN + sizeof(struct ip))
goto out;
pktlen = len - ETHER_HDR_LEN;
eh = mtod(m, struct ether_header *);
if (ntohs(eh->ether_type) != ETHERTYPE_IP)
goto out;
ip = (struct ip *)((uint8_t *)eh + ETHER_HDR_LEN);
if (ip->ip_v != IPVERSION)
goto out;
hlen = ip->ip_hl << 2;
if (hlen < sizeof(struct ip))
goto out;
/*
* Bail if too short, has random trailing garbage, truncated,
* fragment, or has ethernet pad.
*/
if (ntohs(ip->ip_len) < hlen ||
ntohs(ip->ip_len) != pktlen ||
(ntohs(ip->ip_off) & (IP_MF | IP_OFFMASK)) != 0)
goto out;
switch (ip->ip_p) {
case IPPROTO_TCP:
if ((ifp->if_csum_flags_rx & M_CSUM_TCPv4) == 0 ||
pktlen < (hlen + sizeof(struct tcphdr)))
goto out;
csum_flags = M_CSUM_TCPv4 | M_CSUM_DATA | M_CSUM_NO_PSEUDOHDR;
break;
case IPPROTO_UDP:
if ((ifp->if_csum_flags_rx & M_CSUM_UDPv4) == 0 ||
pktlen < (hlen + sizeof(struct udphdr)))
goto out;
uh = (struct udphdr *)((uint8_t *)ip + hlen);
if (uh->uh_sum == 0)
goto out; /* no checksum */
csum_flags = M_CSUM_UDPv4 | M_CSUM_DATA | M_CSUM_NO_PSEUDOHDR;
break;
default:
goto out;
}
/*
* The computed checksum includes Ethernet header, IP headers,
* and CRC, so we have to deduct them.
* Note IP header cksum should be 0xffff so we don't have to
* dedecut them.
*/
dsum = 0;
/* deduct Ethernet header */
dp = (const uint16_t *)eh;
for (hlen = 0; hlen < (ETHER_HDR_LEN / sizeof(uint16_t)); hlen++)
dsum += ntohs(*dp++);
/* deduct CRC */
if (len & 1) {
dsum += (crc >> 24) & 0x00ff;
dsum += (crc >> 8) & 0xffff;
dsum += (crc << 8) & 0xff00;
} else {
dsum += (crc >> 16) & 0xffff;
dsum += (crc >> 0) & 0xffff;
}
while (dsum >> 16)
dsum = (dsum >> 16) + (dsum & 0xffff);
csum_data = rxcsum;
csum_data += (uint16_t)~dsum;
while (csum_data >> 16)
csum_data = (csum_data >> 16) + (csum_data & 0xffff);
out:
m->m_pkthdr.csum_flags = csum_flags;
m->m_pkthdr.csum_data = csum_data;
}
static void
mec_txintr(struct mec_softc *sc, uint32_t txptr)
{
struct ifnet *ifp = &sc->sc_ethercom.ec_if;
struct mec_txdesc *txd;
struct mec_txsoft *txs;
bus_dmamap_t dmamap;
uint64_t txstat;
int i;
u_int col;
DPRINTF(MEC_DEBUG_TXINTR, ("%s: called\n", __func__));
for (i = sc->sc_txdirty; i != txptr && sc->sc_txpending != 0;
i = MEC_NEXTTX(i), sc->sc_txpending--) {
txd = &sc->sc_txdesc[i];
MEC_TXCMDSYNC(sc, i,
BUS_DMASYNC_POSTREAD | BUS_DMASYNC_POSTWRITE);
txstat = txd->txd_stat;
DPRINTF(MEC_DEBUG_TXINTR,
("%s: dirty = %d, txstat = 0x%016llx\n",
__func__, i, txstat));
if ((txstat & MEC_TXSTAT_SENT) == 0) {
MEC_TXCMDSYNC(sc, i, BUS_DMASYNC_PREREAD);
break;
}
txs = &sc->sc_txsoft[i];
if ((txs->txs_flags & MEC_TXS_TXDPTR) != 0) {
dmamap = txs->txs_dmamap;
bus_dmamap_sync(sc->sc_dmat, dmamap, 0,
dmamap->dm_mapsize, BUS_DMASYNC_POSTWRITE);
bus_dmamap_unload(sc->sc_dmat, dmamap);
m_freem(txs->txs_mbuf);
txs->txs_mbuf = NULL;
}
col = (txstat & MEC_TXSTAT_COLCNT) >> MEC_TXSTAT_COLCNT_SHIFT;
if (col)
if_statadd(ifp, if_collisions, col);
if ((txstat & MEC_TXSTAT_SUCCESS) == 0) {
printf("%s: TX error: txstat = 0x%016"PRIx64"\n",
device_xname(sc->sc_dev), txstat);
if_statinc(ifp, if_oerrors);
} else
if_statinc(ifp, if_opackets);
}
/* update the dirty TX buffer pointer */
sc->sc_txdirty = i;
DPRINTF(MEC_DEBUG_INTR,
("%s: sc_txdirty = %2d, sc_txpending = %2d\n",
__func__, sc->sc_txdirty, sc->sc_txpending));
/* cancel the watchdog timer if there are no pending TX packets */
if (sc->sc_txpending == 0)
ifp->if_timer = 0;
}
static bool
mec_shutdown(device_t self, int howto)
{
struct mec_softc *sc = device_private(self);
mec_stop(&sc->sc_ethercom.ec_if, 1);
/* make sure to stop DMA etc. */
mec_reset(sc);
return true;
}
