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mac80211: add a HW flag for supporting HW TX fragmentation

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Currently mac80211 determines whether HW does fragmentation
by checking whether the set_frag_threshold callback is set
or not.
However, some drivers may want to set the HW fragmentation
capability depending on HW generation.
Allow this by checking a HW flag instead of checking the
callback.

Signed-off-by: Sara Sharon <sara.sharon@intel.com>
[added the flag to ath10k and wlcore]
Signed-off-by: Luca Coelho <luciano.coelho@intel.com>
Signed-off-by: Johannes Berg <johannes.berg@intel.com>
This commit is contained in:
Sara Sharon
2016-10-18 23:12:11 +03:00
committed by Johannes Berg
parent 0aa419ec6e
commit f3fe4e93dd
7 changed files with 18 additions and 5 deletions
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10
include/net/mac80211.h
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@@ -2025,6 +2025,10 @@ struct ieee80211_txq {
* drivers, mac80211 packet loss mechanism will not be triggered and driver
* is completely depending on firmware event for station kickout.
*
* @IEEE80211_HW_SUPPORTS_TX_FRAG: Hardware does fragmentation by itself.
* The stack will not do fragmentation.
* The callback for @set_frag_threshold should be set as well.
*
* @NUM_IEEE80211_HW_FLAGS: number of hardware flags, used for sizing arrays
*/
enum ieee80211_hw_flags {
@@ -2066,6 +2070,7 @@ enum ieee80211_hw_flags {
IEEE80211_HW_TX_AMSDU,
IEEE80211_HW_TX_FRAG_LIST,
IEEE80211_HW_REPORTS_LOW_ACK,
IEEE80211_HW_SUPPORTS_TX_FRAG,
/* keep last, obviously */
NUM_IEEE80211_HW_FLAGS
@@ -3093,8 +3098,9 @@ enum ieee80211_reconfig_type {
* The callback must be atomic.
*
* @set_frag_threshold: Configuration of fragmentation threshold. Assign this
* if the device does fragmentation by itself; if this callback is
* implemented then the stack will not do fragmentation.
* if the device does fragmentation by itself. Note that to prevent the
* stack from doing fragmentation IEEE80211_HW_SUPPORTS_TX_FRAG
* should be set as well.
* The callback can sleep.
*
* @set_rts_threshold: Configuration of RTS threshold (if device needs it)