diff options
author | wpaul <wpaul@FreeBSD.org> | 1999-01-10 18:51:49 +0000 |
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committer | wpaul <wpaul@FreeBSD.org> | 1999-01-10 18:51:49 +0000 |
commit | 8d57d11ab2792cdc739e6071501b76ac3fd57246 (patch) | |
tree | d6c15e7c543d8772ea15c366942c687a25bcadbc /sys/dev/vr | |
parent | 910aa44d3b83a9b8499aa367bb1117572d1390d6 (diff) | |
download | FreeBSD-src-8d57d11ab2792cdc739e6071501b76ac3fd57246.zip FreeBSD-src-8d57d11ab2792cdc739e6071501b76ac3fd57246.tar.gz |
Tweak the vr_start() and vr_rxeof() routines a little to improve
performance and reliability a little. There was a condition before
where transmission would stall during periods of heavy traffic
exchange between two hosts. Also set the 'want interrupt' bit in
receive descriptor control words.
Diffstat (limited to 'sys/dev/vr')
-rw-r--r-- | sys/dev/vr/if_vr.c | 39 | ||||
-rw-r--r-- | sys/dev/vr/if_vrreg.h | 5 |
2 files changed, 13 insertions, 31 deletions
diff --git a/sys/dev/vr/if_vr.c b/sys/dev/vr/if_vr.c index 53b0bc4..efed968 100644 --- a/sys/dev/vr/if_vr.c +++ b/sys/dev/vr/if_vr.c @@ -29,7 +29,7 @@ * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF * THE POSSIBILITY OF SUCH DAMAGE. * - * $Id: if_vr.c,v 1.5 1998/12/24 18:03:17 wpaul Exp $ + * $Id: if_vr.c,v 1.16 1999/01/10 18:06:10 wpaul Exp $ */ /* @@ -97,7 +97,7 @@ #ifndef lint static const char rcsid[] = - "$Id: if_vr.c,v 1.5 1998/12/24 18:03:17 wpaul Exp $"; + "$Id: if_vr.c,v 1.16 1999/01/10 18:06:10 wpaul Exp $"; #endif /* @@ -1214,7 +1214,7 @@ static int vr_newbuf(sc, c) c->vr_mbuf = m_new; c->vr_ptr->vr_status = VR_RXSTAT; c->vr_ptr->vr_data = vtophys(mtod(m_new, caddr_t)); - c->vr_ptr->vr_ctl = VR_RXCTL_CHAIN | (MCLBYTES - 1); + c->vr_ptr->vr_ctl = VR_RXCTL | VR_RXLEN; return(0); } @@ -1276,8 +1276,7 @@ static void vr_rxeof(sc) break; } cur_rx->vr_ptr->vr_status = VR_RXSTAT; - cur_rx->vr_ptr->vr_ctl = - VR_RXCTL_CHAIN | (MCLBYTES - 1); + cur_rx->vr_ptr->vr_ctl = VR_RXCTL|VR_RXLEN; continue; } @@ -1304,8 +1303,7 @@ static void vr_rxeof(sc) if (vr_newbuf(sc, cur_rx) == ENOBUFS) { ifp->if_ierrors++; cur_rx->vr_ptr->vr_status = VR_RXSTAT; - cur_rx->vr_ptr->vr_ctl = - VR_RXCTL_CHAIN | (MCLBYTES - 1); + cur_rx->vr_ptr->vr_ctl = VR_RXCTL|VR_RXLEN; continue; } @@ -1383,7 +1381,7 @@ static void vr_txeof(sc) cur_tx = sc->vr_cdata.vr_tx_head; txstat = cur_tx->vr_ptr->vr_status; - if ((txstat & VR_TXSTAT_OWN) || txstat == VR_UNSENT) + if (txstat & VR_TXSTAT_OWN) break; if (txstat & VR_TXSTAT_ERRSUM) { @@ -1429,12 +1427,6 @@ static void vr_txeoc(sc) sc->vr_cdata.vr_tx_tail = NULL; if (sc->vr_want_auto) vr_autoneg_mii(sc, VR_FLAG_SCHEDDELAY, 1); - } else { - if (VR_TXOWN(sc->vr_cdata.vr_tx_head) == VR_UNSENT) { - VR_TXOWN(sc->vr_cdata.vr_tx_head) = VR_TXSTAT_OWN; - ifp->if_timer = 5; - VR_SETBIT16(sc, VR_COMMAND, VR_CMD_TX_ON|VR_CMD_TX_GO); - } } return; @@ -1571,7 +1563,7 @@ static int vr_encap(sc, c, m_head) } c->vr_mbuf = m_head; - c->vr_ptr->vr_ctl |= VR_TXCTL_LASTFRAG; + c->vr_ptr->vr_ctl |= VR_TXCTL_LASTFRAG|VR_TXCTL_FINT; c->vr_ptr->vr_next = vtophys(c->vr_nextdesc->vr_ptr); return(0); @@ -1632,6 +1624,8 @@ static void vr_start(ifp) if (ifp->if_bpf) bpf_mtap(ifp, cur_tx->vr_mbuf); #endif + VR_TXOWN(cur_tx) = VR_TXSTAT_OWN; + VR_SETBIT16(sc, VR_COMMAND, VR_CMD_TX_ON|VR_CMD_TX_GO); } /* @@ -1640,23 +1634,10 @@ static void vr_start(ifp) if (cur_tx == NULL) return; - /* - * Place the request for the upload interrupt - * in the last descriptor in the chain. This way, if - * we're chaining several packets at once, we'll only - * get an interupt once for the whole chain rather than - * once for each packet. - */ - cur_tx->vr_ptr->vr_ctl |= VR_TXCTL_FINT; sc->vr_cdata.vr_tx_tail = cur_tx; - if (sc->vr_cdata.vr_tx_head == NULL) { + if (sc->vr_cdata.vr_tx_head == NULL) sc->vr_cdata.vr_tx_head = start_tx; - VR_TXOWN(start_tx) = VR_TXSTAT_OWN; - VR_SETBIT16(sc, VR_COMMAND, VR_CMD_TX_ON|VR_CMD_TX_GO); - } else { - VR_TXOWN(start_tx) = VR_UNSENT; - } /* * Set a timeout in case the chip goes out to lunch. diff --git a/sys/dev/vr/if_vrreg.h b/sys/dev/vr/if_vrreg.h index 42f3a13..b44dcab 100644 --- a/sys/dev/vr/if_vrreg.h +++ b/sys/dev/vr/if_vrreg.h @@ -29,7 +29,7 @@ * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF * THE POSSIBILITY OF SUCH DAMAGE. * - * $Id: if_vrreg.h,v 1.8 1998/12/01 22:08:11 wpaul Exp $ + * $Id: if_vrreg.h,v 1.9 1999/01/10 18:06:10 wpaul Exp $ */ /* @@ -311,6 +311,7 @@ struct vr_desc { #define VR_RXCTL_CHAIN 0x00008000 #define VR_RXCTL_RX_INTR 0x00800000 +#define VR_RXCTL (VR_RXCTL_CHAIN|VR_RXCTL_RX_INTR) #define VR_TXSTAT_DEFER 0x00000001 #define VR_TXSTAT_UNDERRUN 0x00000002 @@ -337,9 +338,9 @@ struct vr_desc { #define VR_TX_LIST_CNT 64 #define VR_MIN_FRAMELEN 60 #define VR_FRAMELEN 1536 +#define VR_RXLEN 1520 #define VR_TXOWN(x) x->vr_ptr->vr_status -#define VR_UNSENT 0x12341234 struct vr_list_data { struct vr_desc vr_rx_list[VR_RX_LIST_CNT]; |