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FreeBSD hs32.drive.ne.jp 9.1-RELEASE FreeBSD 9.1-RELEASE #1: Wed Jan 14 12:18:08 JST 2015 root@hs32.drive.ne.jp:/sys/amd64/compile/hs32 amd64 |
| Current File : //usr/src/sys/dev/patm/if_patm.c |
/*-
* Copyright (c) 2003
* Fraunhofer Institute for Open Communication Systems (FhG Fokus).
* 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 AND CONTRIBUTORS ``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 OR CONTRIBUTORS 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.
*
* Author: Hartmut Brandt <harti@freebsd.org>
*
* Driver for IDT77252 based cards like ProSum's.
*/
#include <sys/cdefs.h>
__FBSDID("$FreeBSD: release/9.1.0/sys/dev/patm/if_patm.c 148887 2005-08-09 10:20:02Z rwatson $");
#include "opt_inet.h"
#include "opt_natm.h"
#include <sys/types.h>
#include <sys/param.h>
#include <sys/systm.h>
#include <sys/malloc.h>
#include <sys/kernel.h>
#include <sys/bus.h>
#include <sys/errno.h>
#include <sys/conf.h>
#include <sys/module.h>
#include <sys/lock.h>
#include <sys/mutex.h>
#include <sys/sysctl.h>
#include <sys/queue.h>
#include <sys/condvar.h>
#include <sys/endian.h>
#include <vm/uma.h>
#include <sys/sockio.h>
#include <sys/mbuf.h>
#include <sys/socket.h>
#include <net/if.h>
#include <net/if_media.h>
#include <net/if_atm.h>
#include <net/route.h>
#include <netinet/in.h>
#include <netinet/if_atm.h>
#include <machine/bus.h>
#include <machine/resource.h>
#include <sys/bus.h>
#include <sys/rman.h>
#include <sys/mbpool.h>
#include <dev/utopia/utopia.h>
#include <dev/patm/idt77252reg.h>
#include <dev/patm/if_patmvar.h>
static void patm_tst_init(struct patm_softc *sc);
static void patm_scd_init(struct patm_softc *sc);
/*
* Start the card. This assumes the mutex to be held
*/
void
patm_initialize(struct patm_softc *sc)
{
uint32_t cfg;
u_int i;
patm_debug(sc, ATTACH, "configuring...");
/* clear SRAM */
for (i = 0; i < sc->mmap->sram * 1024; i += 4)
patm_sram_write4(sc, i, 0, 0, 0, 0);
patm_scd_init(sc);
/* configuration register. Setting NOIDLE makes the timing wrong! */
cfg = IDT_CFG_TXFIFO9 | IDT_CFG_RXQ512 | PATM_CFG_VPI |
/* IDT_CFG_NOIDLE | */ sc->mmap->rxtab;
if (!(sc->flags & PATM_UNASS))
cfg |= IDT_CFG_IDLECLP;
patm_nor_write(sc, IDT_NOR_CFG, cfg);
/* clean all the status queues and the Raw handle */
memset(sc->tsq, 0, sc->sq_size);
/* initialize RSQ */
patm_debug(sc, ATTACH, "RSQ %llx", (unsigned long long)sc->rsq_phy);
patm_nor_write(sc, IDT_NOR_RSQB, sc->rsq_phy);
patm_nor_write(sc, IDT_NOR_RSQT, sc->rsq_phy);
patm_nor_write(sc, IDT_NOR_RSQH, 0);
sc->rsq_last = PATM_RSQ_SIZE - 1;
/* initialize TSTB */
patm_nor_write(sc, IDT_NOR_TSTB, sc->mmap->tst1base << 2);
patm_tst_init(sc);
/* initialize TSQ */
for (i = 0; i < IDT_TSQ_SIZE; i++)
sc->tsq[i].stamp = htole32(IDT_TSQE_EMPTY);
patm_nor_write(sc, IDT_NOR_TSQB, sc->tsq_phy);
patm_nor_write(sc, IDT_NOR_TSQH, 0);
patm_nor_write(sc, IDT_NOR_TSQT, 0);
sc->tsq_next = sc->tsq;
/* GP */
#if BYTE_ORDER == BIG_ENDIAN && 0
patm_nor_write(sc, IDT_NOR_GP, IDT_GP_BIGE);
#else
patm_nor_write(sc, IDT_NOR_GP, 0);
#endif
/* VPM */
patm_nor_write(sc, IDT_NOR_VPM, 0);
/* RxFIFO */
patm_nor_write(sc, IDT_NOR_RXFD,
IDT_RXFD(sc->mmap->rxfifo_addr, sc->mmap->rxfifo_code));
patm_nor_write(sc, IDT_NOR_RXFT, 0);
patm_nor_write(sc, IDT_NOR_RXFH, 0);
/* RAWHND */
patm_debug(sc, ATTACH, "RWH %llx",
(unsigned long long)sc->rawhnd_phy);
patm_nor_write(sc, IDT_NOR_RAWHND, sc->rawhnd_phy);
/* ABRSTD */
patm_nor_write(sc, IDT_NOR_ABRSTD,
IDT_ABRSTD(sc->mmap->abrstd_addr, sc->mmap->abrstd_code));
for (i = 0; i < sc->mmap->abrstd_size; i++)
patm_sram_write(sc, sc->mmap->abrstd_addr + i, 0);
patm_nor_write(sc, IDT_NOR_ABRRQ, 0);
patm_nor_write(sc, IDT_NOR_VBRRQ, 0);
/* rate tables */
if (sc->flags & PATM_25M) {
for (i = 0; i < patm_rtables_size; i++)
patm_sram_write(sc, sc->mmap->rtables + i,
patm_rtables25[i]);
} else {
for (i = 0; i < patm_rtables_size; i++)
patm_sram_write(sc, sc->mmap->rtables + i,
patm_rtables155[i]);
}
patm_nor_write(sc, IDT_NOR_RTBL, sc->mmap->rtables << 2);
/* Maximum deficit */
patm_nor_write(sc, IDT_NOR_MXDFCT, 32 | IDT_MDFCT_LCI | IDT_MDFCT_LNI);
/* Free buffer queues */
patm_nor_write(sc, IDT_NOR_FBQP0, 0);
patm_nor_write(sc, IDT_NOR_FBQP1, 0);
patm_nor_write(sc, IDT_NOR_FBQP2, 0);
patm_nor_write(sc, IDT_NOR_FBQP3, 0);
patm_nor_write(sc, IDT_NOR_FBQWP0, 0);
patm_nor_write(sc, IDT_NOR_FBQWP1, 0);
patm_nor_write(sc, IDT_NOR_FBQWP2, 0);
patm_nor_write(sc, IDT_NOR_FBQWP3, 0);
patm_nor_write(sc, IDT_NOR_FBQS0,
(SMBUF_THRESHOLD << 28) |
(SMBUF_NI_THRESH << 24) |
(SMBUF_CI_THRESH << 20) |
SMBUF_CELLS);
patm_nor_write(sc, IDT_NOR_FBQS1,
(LMBUF_THRESHOLD << 28) |
(LMBUF_NI_THRESH << 24) |
(LMBUF_CI_THRESH << 20) |
LMBUF_CELLS);
patm_nor_write(sc, IDT_NOR_FBQS2,
(VMBUF_THRESHOLD << 28) | VMBUF_CELLS);
patm_nor_write(sc, IDT_NOR_FBQS3, 0);
/* make SCD0 for UBR0 */
if ((sc->scd0 = patm_scd_alloc(sc)) == NULL) {
patm_printf(sc, "cannot create UBR0 SCD\n");
patm_reset(sc);
return;
}
sc->scd0->q.ifq_maxlen = PATM_DLFT_MAXQ;
patm_scd_setup(sc, sc->scd0);
patm_tct_setup(sc, sc->scd0, NULL);
patm_debug(sc, ATTACH, "go...");
sc->utopia.flags &= ~UTP_FL_POLL_CARRIER;
sc->ifp->if_drv_flags |= IFF_DRV_RUNNING;
/* enable interrupts, Tx and Rx paths */
cfg |= IDT_CFG_RXPTH | IDT_CFG_RXIIMM | IDT_CFG_RAWIE | IDT_CFG_RQFIE |
IDT_CFG_TIMOIE | IDT_CFG_FBIE | IDT_CFG_TXENB | IDT_CFG_TXINT |
IDT_CFG_TXUIE | IDT_CFG_TXSFI | IDT_CFG_PHYIE;
patm_nor_write(sc, IDT_NOR_CFG, cfg);
for (i = 0; i < sc->mmap->max_conn; i++)
if (sc->vccs[i] != NULL)
patm_load_vc(sc, sc->vccs[i], 1);
ATMEV_SEND_IFSTATE_CHANGED(IFP2IFATM(sc->ifp),
sc->utopia.carrier == UTP_CARR_OK);
}
/*
* External callable start function
*/
void
patm_init(void *p)
{
struct patm_softc *sc = p;
mtx_lock(&sc->mtx);
patm_stop(sc);
patm_initialize(sc);
mtx_unlock(&sc->mtx);
}
/*
* Stop the interface
*/
void
patm_stop(struct patm_softc *sc)
{
u_int i;
struct mbuf *m;
struct patm_txmap *map;
struct patm_scd *scd;
sc->ifp->if_drv_flags &= ~IFF_DRV_RUNNING;
sc->utopia.flags |= UTP_FL_POLL_CARRIER;
patm_reset(sc);
mtx_lock(&sc->tst_lock);
i = sc->tst_state;
sc->tst_state = 0;
callout_stop(&sc->tst_callout);
mtx_unlock(&sc->tst_lock);
if (i != 0) {
/* this means we are just entering or leaving the timeout.
* wait a little bit. Doing this correctly would be more
* involved */
DELAY(1000);
}
/*
* Give any waiters on closing a VCC a chance. They will stop
* to wait if they see that IFF_DRV_RUNNING disappeared.
*/
cv_broadcast(&sc->vcc_cv);
/* free large buffers */
patm_debug(sc, ATTACH, "freeing large buffers...");
for (i = 0; i < sc->lbuf_max; i++)
if (sc->lbufs[i].m != NULL)
patm_lbuf_free(sc, &sc->lbufs[i]);
/* free small buffers that are on the card */
patm_debug(sc, ATTACH, "freeing small buffers...");
mbp_card_free(sc->sbuf_pool);
/* free aal0 buffers that are on the card */
patm_debug(sc, ATTACH, "freeing aal0 buffers...");
mbp_card_free(sc->vbuf_pool);
/* freeing partial receive chains and reset vcc state */
for (i = 0; i < sc->mmap->max_conn; i++) {
if (sc->vccs[i] != NULL) {
if (sc->vccs[i]->chain != NULL) {
m_freem(sc->vccs[i]->chain);
sc->vccs[i]->chain = NULL;
sc->vccs[i]->last = NULL;
}
if (sc->vccs[i]->vflags & (PATM_VCC_RX_CLOSING |
PATM_VCC_TX_CLOSING)) {
uma_zfree(sc->vcc_zone, sc->vccs[i]);
sc->vccs[i] = NULL;
} else {
/* keep */
sc->vccs[i]->vflags &= ~PATM_VCC_OPEN;
sc->vccs[i]->cps = 0;
sc->vccs[i]->scd = NULL;
}
}
}
/* stop all active SCDs */
while ((scd = LIST_FIRST(&sc->scd_list)) != NULL) {
/* free queue packets */
for (;;) {
_IF_DEQUEUE(&scd->q, m);
if (m == NULL)
break;
m_freem(m);
}
/* free transmitting packets */
for (i = 0; i < IDT_TSQE_TAG_SPACE; i++) {
if ((m = scd->on_card[i]) != NULL) {
scd->on_card[i] = 0;
map = m->m_pkthdr.header;
bus_dmamap_unload(sc->tx_tag, map->map);
SLIST_INSERT_HEAD(&sc->tx_maps_free, map, link);
m_freem(m);
}
}
patm_scd_free(sc, scd);
}
sc->scd0 = NULL;
sc->flags &= ~PATM_CLR;
/* reset raw cell queue */
sc->rawh = NULL;
ATMEV_SEND_IFSTATE_CHANGED(IFP2IFATM(sc->ifp),
sc->utopia.carrier == UTP_CARR_OK);
}
/*
* Stop the card and reset it
*/
void
patm_reset(struct patm_softc *sc)
{
patm_debug(sc, ATTACH, "resetting...");
patm_nor_write(sc, IDT_NOR_CFG, IDT_CFG_SWRST);
DELAY(200);
patm_nor_write(sc, IDT_NOR_CFG, 0);
DELAY(200);
patm_nor_write(sc, IDT_NOR_RSQH, 0);
patm_nor_write(sc, IDT_NOR_TSQH, 0);
patm_nor_write(sc, IDT_NOR_GP, IDT_GP_PHY_RST);
DELAY(50);
patm_nor_write(sc, IDT_NOR_GP, IDT_GP_EEDO | IDT_GP_EECS);
DELAY(50);
}
/*
* Initialize the soft TST to contain only ABR scheduling and
* write it to SRAM
*/
static void
patm_tst_init(struct patm_softc *sc)
{
u_int i;
u_int base, idle;
base = sc->mmap->tst1base;
idle = sc->mmap->tst1base + sc->mmap->tst_size;
/* soft */
for (i = 0; i < sc->mmap->tst_size - 1; i++)
sc->tst_soft[i] = IDT_TST_VBR;
sc->tst_state = 0;
sc->tst_jump[0] = base + sc->mmap->tst_size - 1;
sc->tst_jump[1] = idle + sc->mmap->tst_size - 1;
sc->tst_base[0] = base;
sc->tst_base[1] = idle;
/* TST1 */
for (i = 0; i < sc->mmap->tst_size - 1; i++)
patm_sram_write(sc, base + i, IDT_TST_VBR);
patm_sram_write(sc, sc->tst_jump[0], IDT_TST_BR | (base << 2));
/* TST2 */
for (i = 0; i < sc->mmap->tst_size - 1; i++)
patm_sram_write(sc, idle + i, IDT_TST_VBR);
patm_sram_write(sc, sc->tst_jump[1], IDT_TST_BR | (idle << 2));
sc->tst_free = sc->mmap->tst_size - 1;
sc->tst_reserve = sc->tst_free * PATM_TST_RESERVE / 100;
sc->bwrem = IFP2IFATM(sc->ifp)->mib.pcr;
}
/*
* Initialize the SCDs. This is done by building a list of all free
* SCDs in SRAM. The first word of each potential SCD is used as a
* link to the next free SCD. The list is rooted in softc.
*/
static void
patm_scd_init(struct patm_softc *sc)
{
u_int s; /* SRAM address of current SCD */
sc->scd_free = 0;
for (s = sc->mmap->scd_base; s + 12 <= sc->mmap->tst1base; s += 12) {
patm_sram_write(sc, s, sc->scd_free);
sc->scd_free = s;
}
}
/*
* allocate an SCQ
*/
struct patm_scd *
patm_scd_alloc(struct patm_softc *sc)
{
u_int sram, next; /* SRAM address of this and next SCD */
int error;
void *p;
struct patm_scd *scd;
bus_dmamap_t map;
bus_addr_t phy;
/* get an SCD from the free list */
if ((sram = sc->scd_free) == 0)
return (NULL);
next = patm_sram_read(sc, sram);
/* allocate memory for the queue and our host stuff */
error = bus_dmamem_alloc(sc->scd_tag, &p, BUS_DMA_NOWAIT, &map);
if (error != 0)
return (NULL);
phy = 0x3ff;
error = bus_dmamap_load(sc->scd_tag, map, p, sizeof(scd->scq),
patm_load_callback, &phy, BUS_DMA_NOWAIT);
if (error != 0) {
bus_dmamem_free(sc->scd_tag, p, map);
return (NULL);
}
KASSERT((phy & 0x1ff) == 0, ("SCD not aligned %lx", (u_long)phy));
scd = p;
bzero(scd, sizeof(*scd));
scd->sram = sram;
scd->phy = phy;
scd->map = map;
scd->space = IDT_SCQ_SIZE;
scd->last_tag = IDT_TSQE_TAG_SPACE - 1;
scd->q.ifq_maxlen = PATM_TX_IFQLEN;
/* remove the scd from the free list */
sc->scd_free = next;
LIST_INSERT_HEAD(&sc->scd_list, scd, link);
return (scd);
}
/*
* Free an SCD
*/
void
patm_scd_free(struct patm_softc *sc, struct patm_scd *scd)
{
LIST_REMOVE(scd, link);
/* clear SCD and insert link word */
patm_sram_write4(sc, scd->sram, sc->scd_free, 0, 0, 0);
patm_sram_write4(sc, scd->sram, 0, 0, 0, 0);
patm_sram_write4(sc, scd->sram, 0, 0, 0, 0);
/* put on free list */
sc->scd_free = scd->sram;
/* free memory */
bus_dmamap_unload(sc->scd_tag, scd->map);
bus_dmamem_free(sc->scd_tag, scd, scd->map);
}
/*
* DMA loading helper function. This function handles the loading of
* all one segment DMA maps. The argument is a pointer to a bus_addr_t
* which must contain the desired alignment of the address as a bitmap.
*/
void
patm_load_callback(void *arg, bus_dma_segment_t *segs, int nsegs, int error)
{
bus_addr_t *phy = arg;
if (error)
return;
KASSERT(nsegs == 1,
("too many segments for DMA: %d", nsegs));
KASSERT(segs[0].ds_addr <= 0xffffffffUL,
("phys addr too large %lx", (u_long)segs[0].ds_addr));
KASSERT((segs[0].ds_addr & *phy) == 0,
("bad alignment %lx:%lx", (u_long)segs[0].ds_addr, (u_long)*phy));
*phy = segs[0].ds_addr;
}