Commit f3fe4e93 authored by Sara Sharon's avatar Sara Sharon Committed by Johannes Berg
Browse files

mac80211: add a HW flag for supporting HW TX fragmentation 



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: default avatarSara Sharon <sara.sharon@intel.com>
[added the flag to ath10k and wlcore]
Signed-off-by: default avatarLuca Coelho <luciano.coelho@intel.com>
Signed-off-by: default avatarJohannes Berg <johannes.berg@intel.com>
parent 0aa419ec

drivers/net/wireless/ath/ath10k/mac.c

+1 −0
Original line number Diff line number Diff line
@@ -7881,6 +7881,7 @@ int ath10k_mac_register(struct ath10k *ar) 
	ieee80211_hw_set(ar->hw, WANT_MONITOR_VIF);

	ieee80211_hw_set(ar->hw, CHANCTX_STA_CSA);

	ieee80211_hw_set(ar->hw, QUEUE_CONTROL);

	ieee80211_hw_set(ar->hw, SUPPORTS_TX_FRAG);



	if (!test_bit(ATH10K_FLAG_RAW_MODE, &ar->dev_flags))

		ieee80211_hw_set(ar->hw, SW_CRYPTO_CONTROL);

drivers/net/wireless/ti/wlcore/main.c

+1 −0
Original line number Diff line number Diff line
@@ -6086,6 +6086,7 @@ static int wl1271_init_ieee80211(struct wl1271 *wl) 
	ieee80211_hw_set(wl->hw, SUPPORTS_DYNAMIC_PS);

	ieee80211_hw_set(wl->hw, SIGNAL_DBM);

	ieee80211_hw_set(wl->hw, SUPPORTS_PS);

	ieee80211_hw_set(wl->hw, SUPPORTS_TX_FRAG);



	wl->hw->wiphy->cipher_suites = cipher_suites;

	wl->hw->wiphy->n_cipher_suites = ARRAY_SIZE(cipher_suites);

include/net/mac80211.h

+8 −2
Original line number Diff line number Diff line
@@ -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)

net/mac80211/debugfs.c

+1 −0
Original line number Diff line number Diff line
@@ -210,6 +210,7 @@ static const char *hw_flag_names[] = { 
	FLAG(TX_AMSDU),

	FLAG(TX_FRAG_LIST),

	FLAG(REPORTS_LOW_ACK),

	FLAG(SUPPORTS_TX_FRAG),

#undef FLAG

};

net/mac80211/main.c

+4 −0
Original line number Diff line number Diff line
@@ -821,6 +821,10 @@ int ieee80211_register_hw(struct ieee80211_hw *hw) 
	     !local->ops->tdls_recv_channel_switch))

		return -EOPNOTSUPP;



	if (WARN_ON(ieee80211_hw_check(hw, SUPPORTS_TX_FRAG) &&

		    !local->ops->set_frag_threshold))

		return -EINVAL;



	if (WARN_ON(local->hw.wiphy->interface_modes &

			BIT(NL80211_IFTYPE_NAN) &&

		    (!local->ops->start_nan || !local->ops->stop_nan)))

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