cvs commit: src/sys/dev/bge if_bge.c if_bgereg.h
glebius at FreeBSD.org
Thu Dec 8 08:12:37 PST 2005
glebius 2005-12-08 16:11:45 UTC
FreeBSD src repository
sys/dev/bge if_bge.c if_bgereg.h
A big rewrite of receive Jumbo frame handling. Remove the local Jumbo
cluster allocator, that wasn't MPSAFE. Instead, utilize our new generic
UMA jumbo cluster allocator. Since UMA gives us a 9k piece that is contigous
in virtual memory, but isn't contigous in physical memory we need to handle
a few segments. To deal with this we utilize Tigon chip feature - extended
RX descriptors, that can handle up to four DMA segments for one frame.
o Remove bge_alloc_jumbo_mem(), bge_free_jumbo_mem(),
bge_jalloc(), bge_jfree() functions.
o Remove SLIST heads, bge_jumbo_tag, bge_jumbo_map from softc.
o Use extended RX BDs for Jumbo receive producer ring, and
initialize it appropriately.
o New bge_newbuf_jumbo():
- Allocate an mbuf with Jumbo cluster with help of m_cljget().
- Load the cluster for DMA with help of bus_dmamap_load_mbuf_sg().
- Assert that we got 3 segments in the DMA mapping.
- Fill in these 3 segments into the extended RX descriptor.
Revision Changes Path
1.103 +49 -233 src/sys/dev/bge/if_bge.c
1.39 +26 -15 src/sys/dev/bge/if_bgereg.h
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