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Add hooks to dynamically change the bge Rx interrupt thresholds. I 

found empiricaly that (at least on bcm5700s) the Rx coalesce and bd
counts cannot be updated on-the-fly; attempting to do so (even at
splhigh()) causes weird behaviour.

Instead, add a softc flag to record that the desired softc values for
Rx-interrupt thresholds have changed; check that boolean in the interrupt
routine. If set, apply the new values there and clear the flag.
This commit is contained in:
jonathan 2004-01-22 02:29:46 +00:00
parent 487ab6705e
commit ca71058195
2 changed files with 19 additions and 3 deletions
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19
sys/dev/pci/if_bge.c
View File

@ -1,4 +1,4 @@
/* $NetBSD: if_bge.c,v 1.57 2003/12/14 03:08:12 jonathan Exp $ */
/* $NetBSD: if_bge.c,v 1.58 2004/01/22 02:29:46 jonathan Exp $ */
/*
* Copyright (c) 2001 Wind River Systems
@ -79,7 +79,7 @@
*/
#include <sys/cdefs.h>
__KERNEL_RCSID(0, "$NetBSD: if_bge.c,v 1.57 2003/12/14 03:08:12 jonathan Exp $");
__KERNEL_RCSID(0, "$NetBSD: if_bge.c,v 1.58 2004/01/22 02:29:46 jonathan Exp $");
#include "bpfilter.h"
#include "vlan.h"
@ -2760,6 +2760,21 @@ bge_intr(xsc)
bge_txeof(sc);
}
if (sc->bge_pending_rxintr_change) {
uint32_t rx_ticks = sc->bge_rx_coal_ticks;
uint32_t rx_bds = sc->bge_rx_max_coal_bds;
uint32_t junk;
CSR_WRITE_4(sc, BGE_HCC_RX_COAL_TICKS, rx_ticks);
DELAY(10);
junk = CSR_READ_4(sc, BGE_HCC_RX_COAL_TICKS);
CSR_WRITE_4(sc, BGE_HCC_RX_MAX_COAL_BDS, rx_bds);
DELAY(10);
junk = CSR_READ_4(sc, BGE_HCC_RX_MAX_COAL_BDS);
sc->bge_pending_rxintr_change = 0;
}
bge_handle_events(sc);
/* Re-enable interrupts. */

3
sys/dev/pci/if_bgereg.h
View File

@ -1,4 +1,4 @@
/* $NetBSD: if_bgereg.h,v 1.16 2004/01/22 02:13:48 jonathan Exp $ */
/* $NetBSD: if_bgereg.h,v 1.17 2004/01/22 02:29:46 jonathan Exp $ */
/*
* Copyright (c) 2001 Wind River Systems
* Copyright (c) 1997, 1998, 1999, 2001
@ -2331,6 +2331,7 @@ struct bge_softc {
struct callout bge_timeout;
char *bge_vpd_prodname;
char *bge_vpd_readonly;
int bge_pending_rxintr_change;
SLIST_HEAD(, txdmamap_pool_entry) txdma_list;
struct txdmamap_pool_entry *txdma[BGE_TX_RING_CNT];
};