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| author | Giuseppe CAVALLARO <peppe.cavallaro@st.com> | 2011-10-18 00:01:20 +0000 |
|---|---|---|
| committer | David S. Miller <davem@davemloft.net> | 2011-10-19 19:24:16 -0400 |
| commit | 51e3137b9b6113c7e12cf0a0dc82238854a86712 (patch) | |
| tree | 29aacb2bdfb421daefc22dd9a7274c2803feb688 /Documentation/networking/stmmac.txt | |
| parent | a9097a9666fd7b08fd2a152b2a0b6c8d48639bb2 (diff) | |
| download | lwn-51e3137b9b6113c7e12cf0a0dc82238854a86712.tar.gz lwn-51e3137b9b6113c7e12cf0a0dc82238854a86712.zip | |
stmmac: update the driver version and doc (V4)
Signed-off-by: Giuseppe Cavallaro <peppe.cavallaro@st.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
Diffstat (limited to 'Documentation/networking/stmmac.txt')
| -rw-r--r-- | Documentation/networking/stmmac.txt | 11 |
1 files changed, 10 insertions, 1 deletions
diff --git a/Documentation/networking/stmmac.txt b/Documentation/networking/stmmac.txt index 40ec92ce4c84..8d67980fabe8 100644 --- a/Documentation/networking/stmmac.txt +++ b/Documentation/networking/stmmac.txt @@ -76,7 +76,16 @@ core. 4.5) DMA descriptors Driver handles both normal and enhanced descriptors. The latter has been only -tested on DWC Ether MAC 10/100/1000 Universal version 3.41a. +tested on DWC Ether MAC 10/100/1000 Universal version 3.41a and later. + +STMMAC supports DMA descriptor to operate both in dual buffer (RING) +and linked-list(CHAINED) mode. In RING each descriptor points to two +data buffer pointers whereas in CHAINED mode they point to only one data +buffer pointer. RING mode is the default. + +In CHAINED mode each descriptor will have pointer to next descriptor in +the list, hence creating the explicit chaining in the descriptor itself, +whereas such explicit chaining is not possible in RING mode. 4.6) Ethtool support Ethtool is supported. Driver statistics and internal errors can be taken using: |