freebsd-dev/sys/dev/pdq/pdq_ifsubr.c
Robert Watson eb956cd041 Use if_maddr_rlock()/if_maddr_runlock() rather than IF_ADDR_LOCK()/
IF_ADDR_UNLOCK() across network device drivers when accessing the
per-interface multicast address list, if_multiaddrs.  This will
allow us to change the locking strategy without affecting our driver
programming interface or binary interface.

For two wireless drivers, remove unnecessary locking, since they
don't actually access the multicast address list.

Approved by:	re (kib)
MFC after:	6 weeks
2009-06-26 11:45:06 +00:00

718 lines
18 KiB
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/* $NetBSD: pdq_ifsubr.c,v 1.38 2001/12/21 23:21:47 matt Exp $ */
/*-
* Copyright (c) 1995, 1996 Matt Thomas <matt@3am-software.com>
* 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. 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.
*
* $NetBSD: pdq_ifsubr.c,v 1.12 1997/06/05 01:56:35 thomas Exp$
*/
#include <sys/cdefs.h>
__FBSDID("$FreeBSD$");
/*
* DEC PDQ FDDI Controller; code for BSD derived operating systems
*
* This module provide bus independent BSD specific O/S functions.
* (ie. it provides an ifnet interface to the rest of the system)
*/
#define PDQ_OSSUPPORT
#include <sys/param.h>
#include <sys/systm.h>
#include <sys/kernel.h>
#include <sys/lock.h>
#include <sys/mutex.h>
#include <sys/malloc.h>
#include <sys/socket.h>
#include <sys/sockio.h>
#include <sys/module.h>
#include <sys/bus.h>
#include <machine/bus.h>
#include <machine/resource.h>
#include <sys/rman.h>
#include <net/if.h>
#include <net/if_arp.h>
#include <net/if_dl.h>
#include <net/if_media.h>
#include <net/if_types.h>
#include <net/fddi.h>
#include <net/bpf.h>
#include <dev/pdq/pdq_freebsd.h>
#include <dev/pdq/pdqreg.h>
devclass_t pdq_devclass;
static void
pdq_ifinit(
pdq_softc_t *sc)
{
if (PDQ_IFNET(sc)->if_flags & IFF_UP) {
PDQ_IFNET(sc)->if_drv_flags |= IFF_DRV_RUNNING;
if (PDQ_IFNET(sc)->if_flags & IFF_PROMISC) {
sc->sc_pdq->pdq_flags |= PDQ_PROMISC;
} else {
sc->sc_pdq->pdq_flags &= ~PDQ_PROMISC;
}
if (PDQ_IFNET(sc)->if_flags & IFF_LINK1) {
sc->sc_pdq->pdq_flags |= PDQ_PASS_SMT;
} else {
sc->sc_pdq->pdq_flags &= ~PDQ_PASS_SMT;
}
sc->sc_pdq->pdq_flags |= PDQ_RUNNING;
pdq_run(sc->sc_pdq);
} else {
PDQ_IFNET(sc)->if_drv_flags &= ~IFF_DRV_RUNNING;
sc->sc_pdq->pdq_flags &= ~PDQ_RUNNING;
pdq_stop(sc->sc_pdq);
}
}
static void
pdq_ifwatchdog(
struct ifnet *ifp)
{
/*
* No progress was made on the transmit queue for PDQ_OS_TX_TRANSMIT
* seconds. Remove all queued packets.
*/
ifp->if_drv_flags &= ~IFF_DRV_OACTIVE;
ifp->if_timer = 0;
for (;;) {
struct mbuf *m;
IFQ_DEQUEUE(&ifp->if_snd, m);
if (m == NULL)
return;
PDQ_OS_DATABUF_FREE(PDQ_OS_IFP_TO_SOFTC(ifp)->sc_pdq, m);
}
}
static void
pdq_ifstart(
struct ifnet *ifp)
{
pdq_softc_t * const sc = PDQ_OS_IFP_TO_SOFTC(ifp);
struct mbuf *m;
int tx = 0;
if ((ifp->if_drv_flags & IFF_DRV_RUNNING) == 0)
return;
if (PDQ_IFNET(sc)->if_timer == 0)
PDQ_IFNET(sc)->if_timer = PDQ_OS_TX_TIMEOUT;
if ((sc->sc_pdq->pdq_flags & PDQ_TXOK) == 0) {
PDQ_IFNET(sc)->if_drv_flags |= IFF_DRV_OACTIVE;
return;
}
sc->sc_flags |= PDQIF_DOWNCALL;
for (;; tx = 1) {
IF_DEQUEUE(&ifp->if_snd, m);
if (m == NULL)
break;
#if defined(PDQ_BUS_DMA) && !defined(PDQ_BUS_DMA_NOTX)
if ((m->m_flags & M_HASTXDMAMAP) == 0) {
bus_dmamap_t map;
if (PDQ_OS_HDR_OFFSET != PDQ_RX_FC_OFFSET) {
m->m_data[0] = PDQ_FDDI_PH0;
m->m_data[1] = PDQ_FDDI_PH1;
m->m_data[2] = PDQ_FDDI_PH2;
}
if (!bus_dmamap_create(sc->sc_dmatag, m->m_pkthdr.len, 255,
m->m_pkthdr.len, 0, BUS_DMA_NOWAIT, &map)) {
if (!bus_dmamap_load_mbuf(sc->sc_dmatag, map, m,
BUS_DMA_WRITE|BUS_DMA_NOWAIT)) {
bus_dmamap_sync(sc->sc_dmatag, map, 0, m->m_pkthdr.len,
BUS_DMASYNC_PREWRITE);
M_SETCTX(m, map);
m->m_flags |= M_HASTXDMAMAP;
}
}
if ((m->m_flags & M_HASTXDMAMAP) == 0)
break;
}
#else
if (PDQ_OS_HDR_OFFSET != PDQ_RX_FC_OFFSET) {
m->m_data[0] = PDQ_FDDI_PH0;
m->m_data[1] = PDQ_FDDI_PH1;
m->m_data[2] = PDQ_FDDI_PH2;
}
#endif
if (pdq_queue_transmit_data(sc->sc_pdq, m) == PDQ_FALSE)
break;
}
if (m != NULL) {
ifp->if_drv_flags |= IFF_DRV_OACTIVE;
IF_PREPEND(&ifp->if_snd, m);
}
if (tx)
PDQ_DO_TYPE2_PRODUCER(sc->sc_pdq);
sc->sc_flags &= ~PDQIF_DOWNCALL;
}
void
pdq_os_receive_pdu(
pdq_t *pdq,
struct mbuf *m,
size_t pktlen,
int drop)
{
pdq_softc_t *sc = pdq->pdq_os_ctx;
struct ifnet *ifp = PDQ_IFNET(sc);
struct fddi_header *fh;
ifp->if_ipackets++;
#if defined(PDQ_BUS_DMA)
{
/*
* Even though the first mbuf start at the first fddi header octet,
* the dmamap starts PDQ_OS_HDR_OFFSET octets earlier. Any additional
* mbufs will start normally.
*/
int offset = PDQ_OS_HDR_OFFSET;
struct mbuf *m0;
for (m0 = m; m0 != NULL; m0 = m0->m_next, offset = 0) {
pdq_os_databuf_sync(sc, m0, offset, m0->m_len, BUS_DMASYNC_POSTREAD);
bus_dmamap_unload(sc->sc_dmatag, M_GETCTX(m0, bus_dmamap_t));
bus_dmamap_destroy(sc->sc_dmatag, M_GETCTX(m0, bus_dmamap_t));
m0->m_flags &= ~M_HASRXDMAMAP;
M_SETCTX(m0, NULL);
}
}
#endif
m->m_pkthdr.len = pktlen;
fh = mtod(m, struct fddi_header *);
if (drop || (fh->fddi_fc & (FDDIFC_L|FDDIFC_F)) != FDDIFC_LLC_ASYNC) {
ifp->if_iqdrops++;
ifp->if_ierrors++;
PDQ_OS_DATABUF_FREE(pdq, m);
return;
}
m->m_pkthdr.rcvif = ifp;
(*ifp->if_input)(ifp, m);
}
void
pdq_os_restart_transmitter(
pdq_t *pdq)
{
pdq_softc_t *sc = pdq->pdq_os_ctx;
PDQ_IFNET(sc)->if_drv_flags &= ~IFF_DRV_OACTIVE;
if (IFQ_IS_EMPTY(&PDQ_IFNET(sc)->if_snd) == 0) {
PDQ_IFNET(sc)->if_timer = PDQ_OS_TX_TIMEOUT;
if ((sc->sc_flags & PDQIF_DOWNCALL) == 0)
pdq_ifstart(PDQ_IFNET(sc));
} else {
PDQ_IFNET(sc)->if_timer = 0;
}
}
void
pdq_os_transmit_done(
pdq_t *pdq,
struct mbuf *m)
{
pdq_softc_t *sc = pdq->pdq_os_ctx;
#if defined(NBPFILTER) && NBPFILTER > 0
if (PQD_IFNET(sc)->if_bpf != NULL)
PDQ_BPF_MTAP(sc, m);
#endif
PDQ_OS_DATABUF_FREE(pdq, m);
PDQ_IFNET(sc)->if_opackets++;
}
void
pdq_os_addr_fill(
pdq_t *pdq,
pdq_lanaddr_t *addr,
size_t num_addrs)
{
pdq_softc_t *sc = pdq->pdq_os_ctx;
struct ifnet *ifp;
struct ifmultiaddr *ifma;
ifp = sc->ifp;
/*
* ADDR_FILTER_SET is always issued before FILTER_SET so
* we can play with PDQ_ALLMULTI and not worry about
* queueing a FILTER_SET ourselves.
*/
pdq->pdq_flags &= ~PDQ_ALLMULTI;
#if defined(IFF_ALLMULTI)
PDQ_IFNET(sc)->if_flags &= ~IFF_ALLMULTI;
#endif
if_maddr_rlock(PDQ_IFNET(sc));
for (ifma = TAILQ_FIRST(&PDQ_IFNET(sc)->if_multiaddrs); ifma && num_addrs > 0;
ifma = TAILQ_NEXT(ifma, ifma_link)) {
char *mcaddr;
if (ifma->ifma_addr->sa_family != AF_LINK)
continue;
mcaddr = LLADDR((struct sockaddr_dl *)ifma->ifma_addr);
((u_short *) addr->lanaddr_bytes)[0] = ((u_short *) mcaddr)[0];
((u_short *) addr->lanaddr_bytes)[1] = ((u_short *) mcaddr)[1];
((u_short *) addr->lanaddr_bytes)[2] = ((u_short *) mcaddr)[2];
addr++;
num_addrs--;
}
if_maddr_runlock(PDQ_IFNET(sc));
/*
* If not all the address fit into the CAM, turn on all-multicast mode.
*/
if (ifma != NULL) {
pdq->pdq_flags |= PDQ_ALLMULTI;
#if defined(IFF_ALLMULTI)
PDQ_IFNET(sc)->if_flags |= IFF_ALLMULTI;
#endif
}
}
#if defined(IFM_FDDI)
static int
pdq_ifmedia_change(
struct ifnet *ifp)
{
pdq_softc_t * const sc = PDQ_OS_IFP_TO_SOFTC(ifp);
if (sc->sc_ifmedia.ifm_media & IFM_FDX) {
if ((sc->sc_pdq->pdq_flags & PDQ_WANT_FDX) == 0) {
sc->sc_pdq->pdq_flags |= PDQ_WANT_FDX;
if (sc->sc_pdq->pdq_flags & PDQ_RUNNING)
pdq_run(sc->sc_pdq);
}
} else if (sc->sc_pdq->pdq_flags & PDQ_WANT_FDX) {
sc->sc_pdq->pdq_flags &= ~PDQ_WANT_FDX;
if (sc->sc_pdq->pdq_flags & PDQ_RUNNING)
pdq_run(sc->sc_pdq);
}
return 0;
}
static void
pdq_ifmedia_status(
struct ifnet *ifp,
struct ifmediareq *ifmr)
{
pdq_softc_t * const sc = PDQ_OS_IFP_TO_SOFTC(ifp);
ifmr->ifm_status = IFM_AVALID;
if (sc->sc_pdq->pdq_flags & PDQ_IS_ONRING)
ifmr->ifm_status |= IFM_ACTIVE;
ifmr->ifm_active = (ifmr->ifm_current & ~IFM_FDX);
if (sc->sc_pdq->pdq_flags & PDQ_IS_FDX)
ifmr->ifm_active |= IFM_FDX;
}
void
pdq_os_update_status(
pdq_t *pdq,
const void *arg)
{
pdq_softc_t * const sc = pdq->pdq_os_ctx;
const pdq_response_status_chars_get_t *rsp = arg;
int media = 0;
switch (rsp->status_chars_get.pmd_type[0]) {
case PDQ_PMD_TYPE_ANSI_MUTLI_MODE: media = IFM_FDDI_MMF; break;
case PDQ_PMD_TYPE_ANSI_SINGLE_MODE_TYPE_1: media = IFM_FDDI_SMF; break;
case PDQ_PMD_TYPE_ANSI_SIGNLE_MODE_TYPE_2: media = IFM_FDDI_SMF; break;
case PDQ_PMD_TYPE_UNSHIELDED_TWISTED_PAIR: media = IFM_FDDI_UTP; break;
default: media |= IFM_MANUAL;
}
if (rsp->status_chars_get.station_type == PDQ_STATION_TYPE_DAS)
media |= IFM_FDDI_DA;
sc->sc_ifmedia.ifm_media = media | IFM_FDDI;
}
#endif /* defined(IFM_FDDI) */
static int
pdq_ifioctl(
struct ifnet *ifp,
u_long cmd,
caddr_t data)
{
pdq_softc_t *sc = PDQ_OS_IFP_TO_SOFTC(ifp);
int error = 0;
PDQ_LOCK(sc);
switch (cmd) {
case SIOCSIFFLAGS: {
pdq_ifinit(sc);
break;
}
case SIOCADDMULTI:
case SIOCDELMULTI: {
if (PDQ_IFNET(sc)->if_drv_flags & IFF_DRV_RUNNING) {
pdq_run(sc->sc_pdq);
error = 0;
}
break;
}
#if defined(IFM_FDDI) && defined(SIOCSIFMEDIA)
case SIOCSIFMEDIA:
case SIOCGIFMEDIA: {
struct ifreq *ifr = (struct ifreq *)data;
error = ifmedia_ioctl(ifp, ifr, &sc->sc_ifmedia, cmd);
break;
}
#endif
default: {
error = fddi_ioctl(ifp, cmd, data);
break;
}
}
PDQ_UNLOCK(sc);
return error;
}
#ifndef IFF_NOTRAILERS
#define IFF_NOTRAILERS 0
#endif
void
pdq_ifattach(pdq_softc_t *sc, const pdq_uint8_t *llc)
{
struct ifnet *ifp;
ifp = PDQ_IFNET(sc) = if_alloc(IFT_FDDI);
if (ifp == NULL)
panic("%s: can not if_alloc()", device_get_nameunit(sc->dev));
mtx_init(&sc->mtx, device_get_nameunit(sc->dev), MTX_NETWORK_LOCK,
MTX_DEF | MTX_RECURSE);
ifp->if_softc = sc;
ifp->if_init = (if_init_f_t *)pdq_ifinit;
ifp->if_snd.ifq_maxlen = IFQ_MAXLEN;
ifp->if_flags = IFF_BROADCAST|IFF_SIMPLEX|IFF_NOTRAILERS|IFF_MULTICAST;
ifp->if_watchdog = pdq_ifwatchdog;
ifp->if_ioctl = pdq_ifioctl;
ifp->if_start = pdq_ifstart;
#if defined(IFM_FDDI)
{
const int media = sc->sc_ifmedia.ifm_media;
ifmedia_init(&sc->sc_ifmedia, IFM_FDX,
pdq_ifmedia_change, pdq_ifmedia_status);
ifmedia_add(&sc->sc_ifmedia, media, 0, 0);
ifmedia_set(&sc->sc_ifmedia, media);
}
#endif
fddi_ifattach(ifp, llc, FDDI_BPF_SUPPORTED);
}
void
pdq_ifdetach (pdq_softc_t *sc)
{
struct ifnet *ifp;
ifp = sc->ifp;
fddi_ifdetach(ifp, FDDI_BPF_SUPPORTED);
if_free(ifp);
pdq_stop(sc->sc_pdq);
pdq_free(sc->dev);
return;
}
void
pdq_free (device_t dev)
{
pdq_softc_t *sc;
sc = device_get_softc(dev);
if (sc->io)
bus_release_resource(dev, sc->io_type, sc->io_rid, sc->io);
if (sc->mem)
bus_release_resource(dev, sc->mem_type, sc->mem_rid, sc->mem);
if (sc->irq_ih)
bus_teardown_intr(dev, sc->irq, sc->irq_ih);
if (sc->irq)
bus_release_resource(dev, SYS_RES_IRQ, sc->irq_rid, sc->irq);
/*
* Destroy the mutex.
*/
if (mtx_initialized(&sc->mtx) != 0) {
mtx_destroy(&sc->mtx);
}
return;
}
#if defined(PDQ_BUS_DMA)
int
pdq_os_memalloc_contig(
pdq_t *pdq)
{
pdq_softc_t * const sc = pdq->pdq_os_ctx;
bus_dma_segment_t db_segs[1], ui_segs[1], cb_segs[1];
int db_nsegs = 0, ui_nsegs = 0;
int steps = 0;
int not_ok;
not_ok = bus_dmamem_alloc(sc->sc_dmatag,
sizeof(*pdq->pdq_dbp), sizeof(*pdq->pdq_dbp),
sizeof(*pdq->pdq_dbp), db_segs, 1, &db_nsegs,
BUS_DMA_NOWAIT);
if (!not_ok) {
steps = 1;
not_ok = bus_dmamem_map(sc->sc_dmatag, db_segs, db_nsegs,
sizeof(*pdq->pdq_dbp), (caddr_t *) &pdq->pdq_dbp,
BUS_DMA_NOWAIT);
}
if (!not_ok) {
steps = 2;
not_ok = bus_dmamap_create(sc->sc_dmatag, db_segs[0].ds_len, 1,
0x2000, 0, BUS_DMA_NOWAIT, &sc->sc_dbmap);
}
if (!not_ok) {
steps = 3;
not_ok = bus_dmamap_load(sc->sc_dmatag, sc->sc_dbmap,
pdq->pdq_dbp, sizeof(*pdq->pdq_dbp),
NULL, BUS_DMA_NOWAIT);
}
if (!not_ok) {
steps = 4;
pdq->pdq_pa_descriptor_block = sc->sc_dbmap->dm_segs[0].ds_addr;
not_ok = bus_dmamem_alloc(sc->sc_dmatag,
PDQ_OS_PAGESIZE, PDQ_OS_PAGESIZE, PDQ_OS_PAGESIZE,
ui_segs, 1, &ui_nsegs, BUS_DMA_NOWAIT);
}
if (!not_ok) {
steps = 5;
not_ok = bus_dmamem_map(sc->sc_dmatag, ui_segs, ui_nsegs,
PDQ_OS_PAGESIZE,
(caddr_t *) &pdq->pdq_unsolicited_info.ui_events,
BUS_DMA_NOWAIT);
}
if (!not_ok) {
steps = 6;
not_ok = bus_dmamap_create(sc->sc_dmatag, ui_segs[0].ds_len, 1,
PDQ_OS_PAGESIZE, 0, BUS_DMA_NOWAIT,
&sc->sc_uimap);
}
if (!not_ok) {
steps = 7;
not_ok = bus_dmamap_load(sc->sc_dmatag, sc->sc_uimap,
pdq->pdq_unsolicited_info.ui_events,
PDQ_OS_PAGESIZE, NULL, BUS_DMA_NOWAIT);
}
if (!not_ok) {
steps = 8;
pdq->pdq_unsolicited_info.ui_pa_bufstart = sc->sc_uimap->dm_segs[0].ds_addr;
cb_segs[0] = db_segs[0];
cb_segs[0].ds_addr += offsetof(pdq_descriptor_block_t, pdqdb_consumer);
cb_segs[0].ds_len = sizeof(pdq_consumer_block_t);
not_ok = bus_dmamem_map(sc->sc_dmatag, cb_segs, 1,
sizeof(*pdq->pdq_cbp), (caddr_t *) &pdq->pdq_cbp,
BUS_DMA_NOWAIT|BUS_DMA_COHERENT);
}
if (!not_ok) {
steps = 9;
not_ok = bus_dmamap_create(sc->sc_dmatag, cb_segs[0].ds_len, 1,
0x2000, 0, BUS_DMA_NOWAIT, &sc->sc_cbmap);
}
if (!not_ok) {
steps = 10;
not_ok = bus_dmamap_load(sc->sc_dmatag, sc->sc_cbmap,
(caddr_t) pdq->pdq_cbp, sizeof(*pdq->pdq_cbp),
NULL, BUS_DMA_NOWAIT);
}
if (!not_ok) {
pdq->pdq_pa_consumer_block = sc->sc_cbmap->dm_segs[0].ds_addr;
return not_ok;
}
switch (steps) {
case 11: {
bus_dmamap_unload(sc->sc_dmatag, sc->sc_cbmap);
/* FALL THROUGH */
}
case 10: {
bus_dmamap_destroy(sc->sc_dmatag, sc->sc_cbmap);
/* FALL THROUGH */
}
case 9: {
bus_dmamem_unmap(sc->sc_dmatag,
(caddr_t) pdq->pdq_cbp, sizeof(*pdq->pdq_cbp));
/* FALL THROUGH */
}
case 8: {
bus_dmamap_unload(sc->sc_dmatag, sc->sc_uimap);
/* FALL THROUGH */
}
case 7: {
bus_dmamap_destroy(sc->sc_dmatag, sc->sc_uimap);
/* FALL THROUGH */
}
case 6: {
bus_dmamem_unmap(sc->sc_dmatag,
(caddr_t) pdq->pdq_unsolicited_info.ui_events,
PDQ_OS_PAGESIZE);
/* FALL THROUGH */
}
case 5: {
bus_dmamem_free(sc->sc_dmatag, ui_segs, ui_nsegs);
/* FALL THROUGH */
}
case 4: {
bus_dmamap_unload(sc->sc_dmatag, sc->sc_dbmap);
/* FALL THROUGH */
}
case 3: {
bus_dmamap_destroy(sc->sc_dmatag, sc->sc_dbmap);
/* FALL THROUGH */
}
case 2: {
bus_dmamem_unmap(sc->sc_dmatag,
(caddr_t) pdq->pdq_dbp,
sizeof(*pdq->pdq_dbp));
/* FALL THROUGH */
}
case 1: {
bus_dmamem_free(sc->sc_dmatag, db_segs, db_nsegs);
/* FALL THROUGH */
}
}
return not_ok;
}
extern void
pdq_os_descriptor_block_sync(
pdq_os_ctx_t *sc,
size_t offset,
size_t length,
int ops)
{
bus_dmamap_sync(sc->sc_dmatag, sc->sc_dbmap, offset, length, ops);
}
extern void
pdq_os_consumer_block_sync(
pdq_os_ctx_t *sc,
int ops)
{
bus_dmamap_sync(sc->sc_dmatag, sc->sc_cbmap, 0, sizeof(pdq_consumer_block_t), ops);
}
extern void
pdq_os_unsolicited_event_sync(
pdq_os_ctx_t *sc,
size_t offset,
size_t length,
int ops)
{
bus_dmamap_sync(sc->sc_dmatag, sc->sc_uimap, offset, length, ops);
}
extern void
pdq_os_databuf_sync(
pdq_os_ctx_t *sc,
struct mbuf *m,
size_t offset,
size_t length,
int ops)
{
bus_dmamap_sync(sc->sc_dmatag, M_GETCTX(m, bus_dmamap_t), offset, length, ops);
}
extern void
pdq_os_databuf_free(
pdq_os_ctx_t *sc,
struct mbuf *m)
{
if (m->m_flags & (M_HASRXDMAMAP|M_HASTXDMAMAP)) {
bus_dmamap_t map = M_GETCTX(m, bus_dmamap_t);
bus_dmamap_unload(sc->sc_dmatag, map);
bus_dmamap_destroy(sc->sc_dmatag, map);
m->m_flags &= ~(M_HASRXDMAMAP|M_HASTXDMAMAP);
}
m_freem(m);
}
extern struct mbuf *
pdq_os_databuf_alloc(
pdq_os_ctx_t *sc)
{
struct mbuf *m;
bus_dmamap_t map;
MGETHDR(m, M_DONTWAIT, MT_DATA);
if (m == NULL) {
printf("%s: can't alloc small buf\n", sc->sc_dev.dv_xname);
return NULL;
}
MCLGET(m, M_DONTWAIT);
if ((m->m_flags & M_EXT) == 0) {
printf("%s: can't alloc cluster\n", sc->sc_dev.dv_xname);
m_free(m);
return NULL;
}
m->m_pkthdr.len = m->m_len = PDQ_OS_DATABUF_SIZE;
if (bus_dmamap_create(sc->sc_dmatag, PDQ_OS_DATABUF_SIZE,
1, PDQ_OS_DATABUF_SIZE, 0, BUS_DMA_NOWAIT, &map)) {
printf("%s: can't create dmamap\n", sc->sc_dev.dv_xname);
m_free(m);
return NULL;
}
if (bus_dmamap_load_mbuf(sc->sc_dmatag, map, m,
BUS_DMA_READ|BUS_DMA_NOWAIT)) {
printf("%s: can't load dmamap\n", sc->sc_dev.dv_xname);
bus_dmamap_destroy(sc->sc_dmatag, map);
m_free(m);
return NULL;
}
m->m_flags |= M_HASRXDMAMAP;
M_SETCTX(m, map);
return m;
}
#endif