iwlwifi: mvm: Change PHY context handling

1. All the phy contexts are added immediately after the
   firmware is loaded and up.
2. Whenever a PHY context needs to be used, its reference
   counter is incremented and the PHY context is being
   configured to the appropriate configuration.
3. When a PHY context is no longer needed, its reference
   count is decremented.
4. PHY contexts are never removed.

Signed-off-by: Ilan Peer <ilan.peer@intel.com>
Reviewed-by: Emmanuel Grumbach <emmanuel.grumbach@intel.com>
Signed-off-by: Johannes Berg <johannes.berg@intel.com>

1 files changed, 17 insertions, 1 deletions

diff --git a/drivers/net/wireless/iwlwifi/mvm/fw.c b/drivers/net/wireless/iwlwifi/mvm/fw.c
index e18c92d..a4071cf 100644
--- a/drivers/net/wireless/iwlwifi/mvm/fw.c
+++ b/drivers/net/wireless/iwlwifi/mvm/fw.c
@@ -388,6 +388,8 @@ out:
 int iwl_mvm_up(struct iwl_mvm *mvm)
 {
 	int ret, i;
+	struct ieee80211_channel *chan;
+	struct cfg80211_chan_def chandef;
 
 	lockdep_assert_held(&mvm->mutex);
 
@@ -443,8 +445,22 @@ int iwl_mvm_up(struct iwl_mvm *mvm)
 	if (ret)
 		goto error;
 
-	IWL_DEBUG_INFO(mvm, "RT uCode started.\n");
+	/* Add all the PHY contexts */
+	chan = &mvm->hw->wiphy->bands[IEEE80211_BAND_2GHZ]->channels[0];
+	cfg80211_chandef_create(&chandef, chan, NL80211_CHAN_NO_HT);
+	for (i = 0; i < NUM_PHY_CTX; i++) {
+		/*
+		 * The channel used here isn't relevant as it's
+		 * going to be overwritten in the other flows.
+		 * For now use the first channel we have.
+		 */
+		ret = iwl_mvm_phy_ctxt_add(mvm, &mvm->phy_ctxts[i],
+					   &chandef, 1, 1);
+		if (ret)
+			goto error;
+	}
 
+	IWL_DEBUG_INFO(mvm, "RT uCode started.\n");
 	return 0;
  error:
 	iwl_trans_stop_device(mvm->trans);