Date: Thu, 17 Nov 2005 10:13:18 +0000 (UTC) From: Gleb Smirnoff <glebius@FreeBSD.org> To: src-committers@FreeBSD.org, cvs-src@FreeBSD.org, cvs-all@FreeBSD.org Subject: cvs commit: src/sys/dev/em if_em.c if_em.h if_em_hw.h Message-ID: <200511171013.jAHADJ4O072668@repoman.freebsd.org>
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glebius 2005-11-17 10:13:18 UTC
FreeBSD src repository
Modified files:
sys/dev/em if_em.c if_em.h if_em_hw.h
Log:
- Backout last change, since it is memory overkill for a non busy host or
for a notebook with em(4) adapter.
- Introduce tunables em.hw.txd and em.hw.rxd, which allow administrator
to configure number of transmit and receive descriptors.
- Check em.hw.txd and em.hw.rxd against hardware limits [*] and require
them to be multiple of 128.
[*] According to comments in if_em.h the 82540EM/82541ER chips can handle
more than 256 descriptors. Since we don't have this hardware to test,
we decided to mimic NetBSD wm(4) driver, that limits these chips to
256 descriptors.
In collaboration with: yongari
Revision Changes Path
1.87 +29 -9 src/sys/dev/em/if_em.c
1.39 +8 -4 src/sys/dev/em/if_em.h
1.18 +7 -0 src/sys/dev/em/if_em_hw.h
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