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2010-02-09 Till Straumann <strauman@slac.stanford.edu>

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* network/tsec.c: Added code to restart halted DMA
	after a TX error (from error-isr). Added statistics
	counters for restarts and DMA bus errors.
This commit is contained in:
Till Straumann
2010-02-10 01:59:57 +00:00
parent 5068f3f994
commit 1bab8a6df1
2 changed files with 30 additions and 1 deletions
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6
c/src/lib/libbsp/powerpc/mvme3100/ChangeLog
View File

@@ -1,3 +1,9 @@
2010-02-09 Till Straumann <strauman@slac.stanford.edu>
* network/tsec.c: Added code to restart halted DMA
after a TX error (from error-isr). Added statistics
counters for restarts and DMA bus errors.
2009-10-22 Sebastian Huber <sebastian.huber@embedded-brains.de>
* Makefile.am, preinstall.am: Update for exception support changes.

25
c/src/lib/libbsp/powerpc/mvme3100/network/tsec.c
View File

@@ -198,6 +198,10 @@ void tsec_dump_rring(struct tsec_private *mp);
#define EV_IS_PHY(ev) ( (ev) & 2 )
#endif
#ifndef MAXEBERRS
#define MAXEBERRS 10
#endif
#define EV_IS_ANY(ev) ( (ev) & ((1<<EV_PER_UNIT) - 1) )
#define EV_MSK ( ( 1 << (EV_PER_UNIT * TSEC_NUM_DRIVER_SLOTS) ) - 1)
@@ -697,6 +701,8 @@ struct tsec_private {
unsigned packet;
unsigned odrops;
unsigned repack;
unsigned eberrs;
unsigned dmarst;
} stats;
uint16_t mc_refcnt[NUM_MC_HASHES];
};
@@ -1580,6 +1586,8 @@ FEC_Enet_Base b;
fprintf(f, "TX IRQS: %u\n", mp->stats.xirqs);
fprintf(f, "RX IRQS: %u\n", mp->stats.rirqs);
fprintf(f, "ERR IRQS: %u\n", mp->stats.eirqs);
fprintf(f, "bus errs: %u\n", mp->stats.eberrs);
fprintf(f, "dmawhack: %u\n", mp->stats.dmarst);
fprintf(f, "LNK IRQS: %u\n", mp->stats.lirqs);
fprintf(f, "maxchain: %u\n", mp->stats.maxchain);
fprintf(f, "xpackets: %u\n", mp->stats.packet);
@@ -2272,9 +2280,14 @@ static void tsec_eisr(rtems_irq_hdl_param arg)
{
struct tsec_private *mp = (struct tsec_private *)arg;
rtems_interrupt_level l;
uint32_t pending;
rtems_interrupt_disable( l );
mp->irq_pending |= tsec_dis_clr_irqs( mp );
/* make local copy since ISR may ack and clear mp->pending;
* also, we want the fresh bits not the ORed state including
* the past...
*/
mp->irq_pending |= (pending = tsec_dis_clr_irqs( mp ));
rtems_interrupt_enable( l );
mp->stats.eirqs++;
@@ -2283,6 +2296,16 @@ rtems_interrupt_level l;
mp->isr( mp->isr_arg );
else
rtems_event_send( mp->tid, mp->event );
if ( (TSEC_IEVENT_TXE & pending) ) {
if ( (TSEC_IEVENT_EBERR & pending) && ++mp->stats.eberrs > MAXEBERRS ) {
printk(DRVNAME" BAD error: max # of DMA bus errors reached\n");
} else {
/* Restart DMA -- do we have to clear DMACTRL[GTS], too ?? */
fec_wr( mp->base, TSEC_TSTAT, TSEC_TSTAT_THLT );
mp->stats.dmarst++;
}
}
}
static void tsec_lisr(rtems_irq_hdl_param arg)