ieee802154: add support for phy capabilities

Hi,

this patch series contains support for phy capabilities. The phy capabilities can be used to check the setting parameters in nl802154 before we calling the according rdev-ops to send them into SoftMAC/Driver(HardMAC) layer. This avoids that we know before sending them to these layers that we know a "-EINVAL" before, this can be used to check all setting parameters in one setting commands like [0]. Additional we can now dump the capabilities into userspace so users know what the phy is supported.

The initial values for phy capabilities is that if the driver supports the according handling then the full range of 802.15.4 is supported like csma parameters or max frame retries. If the driver doesn't support the setting of these we assume the 802.15.4 standard values which cannot be changed. (If the phy supports that in any way then the driver is broken and need to support that, we assume that the phy doing 802.15.4 defaults). This case is for mac parameters. In case of that the driver supports the according settings like CSMA/frame retries _but_ not the full range of the 802.15.4 then the driver can overwrite this behaviour by changing the capabilities.

For phy parameters, if the driver doesn't set anything, then there is also no possibility to change these values from userspace, this is also a lack of support inside the driver then.

At least this patch series also includes a rework of setting/reporting tx_powers/cca_ed_levels values.

- Alex

changes since v2:
- fix nl802154_capability_attr to nl802154_wpan_phy_capability_attr
- change dbm handling to mbm handling
- reorder patches "mac802154: check for really change" and "mac802154: remove check if operation is supported" because inconsitent when it's applied before "ieee802154: add several phy supported handling"

changes since v3:
- rebase with cleanups on bluetooth-next.
- remove the listet iteration of transmit powers and cca energy detection levels.
- introduce wpan phy flags for checking in nl802154 for L1 supports. The hw flags are related to L2 settings which the phy supports. Was needed to access txpower/cca energy detection array without checking on null in nl802154 layer.
- add cca_ed_levels reset values for at86rf230.

Alexander Aring (17):
nl802154: cleanup invalid argument handling
ieee802154: move validation check out of softmac
ieee802154: change transmit power to s32
ieee802154: change transmit power to mbm
ieee802154: change cca ed level to mbm
ieee802154: introduce wpan_phy_supported
ieee802154: add several phy supported handling
mac802154: check for really changes
mac802154: remove check if operation is supported
cfg802154: introduce wpan phy flags
ieee802154: add iftypes capability
at86rf230: set cca_modes supported flags
at86rf230: rework tx power support
at86rf230: rework tx cca energy detection level
at86rf230: add cca ed level reset value
at86rf230: add reset states of tx power level
nl802154: add support for dump phy capabilities

 drivers/net/ieee802154/at86rf230.c | 187 +++++++++++++++++++++++++--------
 drivers/net/ieee802154/cc2520.c    |   2 +-
 drivers/net/ieee802154/fakelb.c    |  30 +++---
 drivers/net/ieee802154/mrf24j40.c  |   2 +-
 include/net/cfg802154.h            |  62 ++++++++++-
 include/net/mac802154.h            |  38 ++-----
 include/net/nl802154.h             |  79 ++++++++++++++
 net/ieee802154/nl-mac.c            |   8 +-
 net/ieee802154/nl-phy.c            |   4 +-
 net/ieee802154/nl802154.c          | 209 ++++++++++++++++++++++++++++++++-----
 net/mac802154/cfg.c                |  63 ++++-------
 net/mac802154/driver-ops.h         |   8 +-
 net/mac802154/mac_cmd.c            |   6 +-
 net/mac802154/main.c               |  32 ++++++
 14 files changed, 557 insertions(+), 173 deletions(-)

2.3.7