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Code Issues Releases Activity

Increase a maximum segment size of DMA to 4096. Previously it used

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MCLBYTES for the segment size but it used too many Tx descriptors in
TSO case.
While I'm here adjust maximum size of the sum of all segment lengths
in a given DMA mapping to 65535, the maximum size, in bytes, of a IP
packet.
This commit is contained in:
Pyun YongHyeon 2007-06-12 02:35:01 +00:00
parent b5f0caf909
commit 1c88901672
Notes: svn2git 2020-12-20 02:59:44 +00:00 
svn path=/head/; revision=170595
2 changed files with 4 additions and 2 deletions
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4
sys/dev/nfe/if_nfe.c
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@ -1555,9 +1555,9 @@ nfe_alloc_tx_ring(struct nfe_softc *sc, struct nfe_tx_ring *ring)
BUS_SPACE_MAXADDR,
BUS_SPACE_MAXADDR,
NULL, NULL,
MCLBYTES * NFE_MAX_SCATTER,
NFE_TSO_MAXSIZE,
NFE_MAX_SCATTER,
MCLBYTES,
NFE_TSO_MAXSGSIZE,
0,
NULL, NULL,
&ring->tx_data_tag);

2
sys/dev/nfe/if_nfereg.h
View File

@ -50,6 +50,8 @@
#define NFE_JMEM ((NFE_JLEN * NFE_JSLOTS) + NFE_RESID)
#define NFE_MAX_SCATTER 32
#define NFE_TSO_MAXSGSIZE 4096
#define NFE_TSO_MAXSIZE 65535
#define NFE_IRQ_STATUS 0x000
#define NFE_IRQ_MASK 0x004