| vr.4 (45022) | vr.4 (49831) |
|---|---|
| 1.\" Copyright (c) 1997, 1998 2.\" Bill Paul <wpaul@ctr.columbia.edu>. All rights reserved. 3.\" 4.\" Redistribution and use in source and binary forms, with or without 5.\" modification, are permitted provided that the following conditions 6.\" are met: 7.\" 1. Redistributions of source code must retain the above copyright 8.\" notice, this list of conditions and the following disclaimer. --- 14 unchanged lines hidden (view full) --- 23.\" BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR 24.\" CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF 25.\" SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS 26.\" INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN 27.\" CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) 28.\" ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF 29.\" THE POSSIBILITY OF SUCH DAMAGE. 30.\" | 1.\" Copyright (c) 1997, 1998 2.\" Bill Paul <wpaul@ctr.columbia.edu>. All rights reserved. 3.\" 4.\" Redistribution and use in source and binary forms, with or without 5.\" modification, are permitted provided that the following conditions 6.\" are met: 7.\" 1. Redistributions of source code must retain the above copyright 8.\" notice, this list of conditions and the following disclaimer. --- 14 unchanged lines hidden (view full) --- 23.\" BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR 24.\" CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF 25.\" SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS 26.\" INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN 27.\" CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) 28.\" ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF 29.\" THE POSSIBILITY OF SUCH DAMAGE. 30.\" |
| 31.\" $Id: vr.4,v 1.2 1998/12/05 09:31:25 rnordier Exp $ | 31.\" $Id: vr.4,v 1.3 1999/03/25 00:52:44 wpaul Exp $ |
| 32.\" 33.Dd November 22, 1998 34.Dt VR 4 i386 35.Os FreeBSD 36.Sh NAME 37.Nm vr 38.Nd 39VIA Technologies VT3043 and VT86C100A ethernet device driver --- 102 unchanged lines hidden (view full) --- 142.%T The VIA Technologies VT86C100A data sheet 143.%O http://www.via.com.tw 144.Re 145.Sh HISTORY 146The 147.Nm 148device driver first appeared in 149.Fx 3.0 . | 32.\" 33.Dd November 22, 1998 34.Dt VR 4 i386 35.Os FreeBSD 36.Sh NAME 37.Nm vr 38.Nd 39VIA Technologies VT3043 and VT86C100A ethernet device driver --- 102 unchanged lines hidden (view full) --- 142.%T The VIA Technologies VT86C100A data sheet 143.%O http://www.via.com.tw 144.Re 145.Sh HISTORY 146The 147.Nm 148device driver first appeared in 149.Fx 3.0 . |
| 150.Sh AUTHOR | 150.Sh AUTHORS |
| 151The 152.Nm 153driver was written by 154.An Bill Paul Aq wpaul@ctr.columbia.edu . 155.Sh BUGS 156The 157.Nm 158driver always copies transmit mbuf chains into longword-aligned 159buffers prior to transmission in order to pacify the Rhine chips. 160If buffers are not aligned correctly, the chip will round the 161supplied buffer address and begin DMAing from the wrong location. 162This buffer copying impairs transmit performance on slower systems but can't 163be avoided. On faster machines (e.g. a Pentium II), the performance 164impact is much less noticable. | 151The 152.Nm 153driver was written by 154.An Bill Paul Aq wpaul@ctr.columbia.edu . 155.Sh BUGS 156The 157.Nm 158driver always copies transmit mbuf chains into longword-aligned 159buffers prior to transmission in order to pacify the Rhine chips. 160If buffers are not aligned correctly, the chip will round the 161supplied buffer address and begin DMAing from the wrong location. 162This buffer copying impairs transmit performance on slower systems but can't 163be avoided. On faster machines (e.g. a Pentium II), the performance 164impact is much less noticable. |