diff options
Diffstat (limited to 'sys/dev')
| -rw-r--r-- | sys/dev/ic/dp8390.c | 46 |
1 files changed, 24 insertions, 22 deletions
diff --git a/sys/dev/ic/dp8390.c b/sys/dev/ic/dp8390.c index 49e9d6d9051..c57c1884c33 100644 --- a/sys/dev/ic/dp8390.c +++ b/sys/dev/ic/dp8390.c @@ -1,4 +1,4 @@ -/* $OpenBSD: dp8390.c,v 1.2 1999/02/28 03:23:36 jason Exp $ */ +/* $OpenBSD: dp8390.c,v 1.3 1999/03/02 06:12:33 fgsch Exp $ */ /* $NetBSD: dp8390.c,v 1.13 1998/07/05 06:49:11 jonathan Exp $ */ /* @@ -336,12 +336,6 @@ dp8390_init(sc) NIC_PUT(regt, regh, ED_P0_PSTOP, sc->rec_page_stop); /* - * Clear all interrupts. A '1' in each bit position clears the - * corresponding flag. - */ - NIC_PUT(regt, regh, ED_P0_ISR, 0xff); - - /* * Enable the following interrupts: receive/transmit complete, * receive/transmit error, and Receiver OverWrite. * @@ -351,6 +345,12 @@ dp8390_init(sc) ED_IMR_PRXE | ED_IMR_PTXE | ED_IMR_RXEE | ED_IMR_TXEE | ED_IMR_OVWE); + /* + * Clear all interrupts. A '1' in each bit position clears the + * corresponding flag. + */ + NIC_PUT(regt, regh, ED_P0_ISR, 0xff); + /* Program command register for page 1. */ NIC_PUT(regt, regh, ED_P0_CR, sc->cr_proto | ED_CR_PAGE_1 | ED_CR_STP); @@ -385,6 +385,7 @@ dp8390_init(sc) NIC_PUT(regt, regh, ED_P1_CR, sc->cr_proto | ED_CR_PAGE_0 | ED_CR_STP); + /* Accept broadcast and multicast packets by default. */ i = ED_RCR_AB | ED_RCR_AM; if (ifp->if_flags & IFF_PROMISC) { /* @@ -449,8 +450,7 @@ dp8390_xmit(sc) sc->cr_proto | ED_CR_PAGE_0 | ED_CR_TXP | ED_CR_STA); /* Point to next transmit buffer slot and wrap if necessary. */ - sc->txb_next_tx++; - if (sc->txb_next_tx == sc->txb_cnt) + if (++sc->txb_next_tx == sc->txb_cnt) sc->txb_next_tx = 0; /* Set a timer just in case we never hear from the board again. */ @@ -511,15 +511,13 @@ outloop: m_freem(m0); sc->txb_len[sc->txb_new] = max(len, ETHER_MIN_LEN); - /* Start the first packet transmitting. */ - if (sc->txb_inuse == 0) - dp8390_xmit(sc); - /* Point to next buffer slot and wrap if necessary. */ if (++sc->txb_new == sc->txb_cnt) sc->txb_new = 0; - sc->txb_inuse++; + /* Start the first packet transmitting. */ + if (sc->txb_inuse++ == 0) + dp8390_xmit(sc); /* Loop back to the top to possibly buffer more packets. */ goto outloop; @@ -689,10 +687,15 @@ dp8390_intr(arg) /* * Handle transmitter interrupts. Handle these first because * the receiver will reset the board under some conditions. + * + * If the chip was reset while a packet was transmitting, it + * may still deliver a TX interrupt. In this case, just ignore + * the interrupt. */ - if (isr & (ED_ISR_PTX | ED_ISR_TXE)) { - u_char collisions = NIC_GET(regt, regh, - ED_P0_NCR) & 0x0f; + if (isr & (ED_ISR_PTX | ED_ISR_TXE) && + sc->txb_inuse != 0) { + u_char collisions = + NIC_GET(regt, regh, ED_P0_NCR) & 0x0f; /* * Check for transmit error. If a TX completed with an @@ -703,7 +706,6 @@ dp8390_intr(arg) * course, with UDP we're screwed, but this is expected * when a network is heavily loaded. */ - (void)NIC_GET(regt, regh, ED_P0_TSR); if (isr & ED_ISR_TXE) { /* * Excessive collisions (16). @@ -721,6 +723,9 @@ dp8390_intr(arg) /* Update output errors counter. */ ++ifp->if_oerrors; } else { + /* Throw away the non-error status bits. */ + (void)NIC_GET(regt, regh, ED_P0_TSR); + /* * Update total number of successfully * transmitted packets. @@ -728,9 +733,6 @@ dp8390_intr(arg) ++ifp->if_opackets; } - /* Done with the buffer. */ - sc->txb_inuse--; - /* Clear watchdog timer. */ ifp->if_timer = 0; ifp->if_flags &= ~IFF_OACTIVE; @@ -748,7 +750,7 @@ dp8390_intr(arg) * If data is ready to transmit, start it transmitting, * otherwise defer until after handling receiver. */ - if (sc->txb_inuse > 0) + if (--sc->txb_inuse != 0) dp8390_xmit(sc); } |