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author | Mauro Carvalho Chehab | 2020-02-06 16:17:22 +0100 |
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committer | Marcel Holtmann | 2020-02-28 14:52:36 +0100 |
commit | 107db7ec783820411801c469ed08f8f68b369e08 (patch) | |
tree | 528888a6c96fe610c2450d23dc186a2561c2c3d3 /Documentation/networking/6lowpan.rst | |
parent | 8788a1ee070ab9984015ac6ab6af49f2fbfb2cb3 (diff) |
docs: networking: convert 6lowpan.txt to ReST
- add SPDX header;
- use document title markup;
- mark code blocks and literals as such;
- adjust identation, whitespaces and blank lines;
- add to networking/index.rst.
Signed-off-by: Mauro Carvalho Chehab <mchehab+huawei@kernel.org>
Reviewed-by: Stefan Schmidt <stefan@datenfreihafen.org>
Signed-off-by: Marcel Holtmann <marcel@holtmann.org>
Diffstat (limited to 'Documentation/networking/6lowpan.rst')
-rw-r--r-- | Documentation/networking/6lowpan.rst | 53 |
1 files changed, 53 insertions, 0 deletions
diff --git a/Documentation/networking/6lowpan.rst b/Documentation/networking/6lowpan.rst new file mode 100644 index 000000000000..e70a6520cc33 --- /dev/null +++ b/Documentation/networking/6lowpan.rst @@ -0,0 +1,53 @@ +.. SPDX-License-Identifier: GPL-2.0 + +============================================== +Netdev private dataroom for 6lowpan interfaces +============================================== + +All 6lowpan able net devices, means all interfaces with ARPHRD_6LOWPAN, +must have "struct lowpan_priv" placed at beginning of netdev_priv. + +The priv_size of each interface should be calculate by:: + + dev->priv_size = LOWPAN_PRIV_SIZE(LL_6LOWPAN_PRIV_DATA); + +Where LL_PRIV_6LOWPAN_DATA is sizeof linklayer 6lowpan private data struct. +To access the LL_PRIV_6LOWPAN_DATA structure you can cast:: + + lowpan_priv(dev)-priv; + +to your LL_6LOWPAN_PRIV_DATA structure. + +Before registering the lowpan netdev interface you must run:: + + lowpan_netdev_setup(dev, LOWPAN_LLTYPE_FOOBAR); + +wheres LOWPAN_LLTYPE_FOOBAR is a define for your 6LoWPAN linklayer type of +enum lowpan_lltypes. + +Example to evaluate the private usually you can do:: + + static inline struct lowpan_priv_foobar * + lowpan_foobar_priv(struct net_device *dev) + { + return (struct lowpan_priv_foobar *)lowpan_priv(dev)->priv; + } + + switch (dev->type) { + case ARPHRD_6LOWPAN: + lowpan_priv = lowpan_priv(dev); + /* do great stuff which is ARPHRD_6LOWPAN related */ + switch (lowpan_priv->lltype) { + case LOWPAN_LLTYPE_FOOBAR: + /* do 802.15.4 6LoWPAN handling here */ + lowpan_foobar_priv(dev)->bar = foo; + break; + ... + } + break; + ... + } + +In case of generic 6lowpan branch ("net/6lowpan") you can remove the check +on ARPHRD_6LOWPAN, because you can be sure that these function are called +by ARPHRD_6LOWPAN interfaces. |